Nothing Special   »   [go: up one dir, main page]

CN107227387A - Quick reduction reactor and the quick reduction reaction system and method for water-cooled miberal powder - Google Patents

Quick reduction reactor and the quick reduction reaction system and method for water-cooled miberal powder Download PDF

Info

Publication number
CN107227387A
CN107227387A CN201710614263.5A CN201710614263A CN107227387A CN 107227387 A CN107227387 A CN 107227387A CN 201710614263 A CN201710614263 A CN 201710614263A CN 107227387 A CN107227387 A CN 107227387A
Authority
CN
China
Prior art keywords
reduction
gas
reactor
air
miberal powder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710614263.5A
Other languages
Chinese (zh)
Inventor
吴道洪
郑倩倩
孟嘉乐
窦从从
王培伦
彭丽
田广胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenwu Technology Group Corp Co Ltd
Original Assignee
Shenwu Technology Group Corp Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenwu Technology Group Corp Co Ltd filed Critical Shenwu Technology Group Corp Co Ltd
Priority to CN201710614263.5A priority Critical patent/CN107227387A/en
Publication of CN107227387A publication Critical patent/CN107227387A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B13/00Making spongy iron or liquid steel, by direct processes
    • C21B13/0073Selection or treatment of the reducing gases
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B13/00Making spongy iron or liquid steel, by direct processes
    • C21B13/02Making spongy iron or liquid steel, by direct processes in shaft furnaces

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)

Abstract

The invention belongs to metallurgical technology field, and in particular to a kind of quick reduction reaction system and method for quick reduction reactor and water-cooled miberal powder.System includes:Quick reduction reactor, heating system and also Primordial Qi system, wherein, the cooling section of the quick reduction reactor includes the air-cooled region and water cooling region that set gradually from top to bottom;The also Primordial Qi system includes exhaust gas processing device and reduction gas storage tank, and the exhaust gas processing device is connected with the reduction offgas outlet and the reduction gas storage tank of reactor respectively, and the reduction gas storage tank is connected through also Primordial Qi air intake valve with the air distribution plate in air-cooled region.As a result, the reduction tail gas after reduction is after cleaning dust cooling, gas compression, carbonization treatment, what is obtained is rich in CO2Reduction tail gas feeding reduction tail gas storage tank, and obtained unreacted reducing gas is then sent into reduction gas storage tank and mix with brand-new also Primordial Qi, hereby it is achieved that being made full use of to top gas, it is to avoid the unreacted reducibility gas of waste.

Description

Quick reduction reactor and the quick reduction reaction system and method for water-cooled miberal powder
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of quick reduction reactor and water-cooled miberal powder are quickly gone back Former reaction system and method.
Background technology
It is well known that direct reduction processes of Iron ores is the cutting edge technology of development of iron & steel industry, it is that development of iron & steel industry is broken away from The yoke of coking coal resource, reduction energy consumption, reduction CO2Discharge, the important hair for improving steel products structure, improving steel products quality Open up direction.DRI is the substitute of high-quality steel scrap, is the source of iron raw material that can not be short for producing high-quality clean steel, is The high-quality cooling agent of pneumatic steelmaking.
Now, reach commercial production levels or be still broadly divided into two classes in the direct reduction process for continuing to test:Use gas The direct-reduction process of body reducing agent and the direct-reduction process using solid reductant.Wherein, directly going back using gaseous reducing agent Former method is divided by process equipment and can be divided into three classes, including shaft furnace process, retort process making sponge iron and fluidized bed process.
Shaft furnace process be it is a kind of refer to furnace charge and coal gas in stove reverse movement, cause the furnace charge that declines progressively by heated by gas and The method of reduction.The method, using Midrex methods as representative, is most fast, the most widely used direct reduction iron making of current development. The specific work process of Midrex methods is:Added as the oxide pellet of raw material from furnace roof after shaft furnace, sequentially pass through preheating, go back Former and cooling three phases, the sponge iron obtained by reduction, the sponge iron discharges out of the furnace after being cooled to 50 DEG C, to prevent reoxidizing; Wherein, reducing gas is manufactured with a part of coal gas of natural gas and shaft furnace in itself, 760-900 DEG C is first to heat to, in reduction shaft furnace Pars infrasegmentalis is passed through, then, and stock gas is respectively used to coal gas regeneration, conversion stove heat and shaft furnace cooling after reclaiming.Therefore, this method Heat and mass efficiency high, product energy consumption per ton can be low up to 2.56 × 106 kilocalories, good product quality, and degree of metalization is up to 92%.Specially Sharp document CN201110282924.1 discloses a kind of method and device of gas-based reduction shaft furnace production DRI, uses Coal system also Primordial Qi and coke-stove gas combine supply shaft furnace production DRI.But, there are some defects in the technique:It can only locate Manage lump material, it is impossible to directly handle powdery iron ore.Agglomeration is needed during processing powdery iron ore, the tedious process and consumption energy consumption Water, it is less economical.
The HyL methods of Mexico are unique industrialization retort processes making sponge iron, and its specific course of work is as follows:Furnace charge is in retort In it is fixed, be passed through thermal reduction coal gas and preheated, reduced and cooled down successively, finally periodically stop the supple of gas or steam, outside furnace charge drain tank. In addition, in order to overcome conventional fixed bed reducing gas to utilize bad shortcoming, HyL methods employ 4 retort serial operations, Reducing gas is manufactured with natural gas, first conversion insufficient in heat-exchanged reformer, and after the reaction of each retort All be dehydrated, secondary conversion and temperature raising, coal gas reduced at a high temperature of 1100 DEG C;Moreover, in the case where stopping ventilation, HyL Method forces discharge using discharge bar.Therefore, this method has advantages below:It is not afraid of charging binding, operation temperature is higher, though between being Disconnected operation, productivity ratio is not low.But, this method still suffers from following shortcoming:It is poor that coal gas is utilized, and heat consumption is big, and product quality is uneven.
Fluidized bed process is the method that gas reduction Iron Ore Powder is used in fluid bed.In fluidized bed process reduction, specific work Make process as follows:Air flow press moldingization that the smitham bed of material is through simultaneously is heated, reduces and cooled down successively, obtains going back original product Briquetting is preserved after cooling;Wherein, coal gas also serves as the fluidizing agent of bulk cargo layer in addition to as reducing agent and heat carrier.Therefore, should Method has advantages below:Fluidized reduction has the advantages that directly to use miberal powder to save agglomeration, and because ore grain size is small and Can Accelerating reduction.But, this method still suffers from following shortcoming:Particulate miberal powder is very easily bonded, typically in 600-700 DEG C of not high temperature Degree is lower to be operated, and not only reduction rate is little, and easily facilitates CO analysis carbon to react;Carbon precipitating is excessive, then hinders normal behaviour Make.Therefore, a kind of quick reduction reaction system of miberal powder for reducing energy consumption, improving reduction gas utilization rate how is designed, as mesh The problem of preceding urgent need to resolve.
The content of the invention
For above-mentioned problem present in prior art, the invention provides a kind of quick reduction reactor and water-cooled The quick reduction reaction system and method for miberal powder, DRI is produced for powder ore;Compared with gas-based shaft kiln, the system can To handle powdery miberal powder, the processes such as pelletizing, drying, roasting are saved, whole technological process is simpler, simultaneously as powdered ore Powder footpath is small, big with reducing gas contact area, and the chemical reaction rate between the two is accelerated, and increases feed throughput, in addition, soon Fast reduction apparatus is using heat accumulation type radiant tube as thermal source, and the efficiency of heating surface is high, while the dustiness in reduction tail gas can be reduced; Compared with reducing fluid bed, quick reduction reaction system need to only control combustion gas, air mass flow to control the temperature in reactor, grasp Make simple, while the shut-down that " bonding defluidization " phenomenon is caused can be avoided in fluidized reduction method;Reduction tail gas warp after reduction Cross after cleaning dust cooling, gas compression, carbonization treatment, what is obtained is rich in CO2Reduction tail gas feeding reduction tail gas storage tank, and Obtained unreacted reducing gas is then sent into reduction gas storage tank and mixed with brand-new also Primordial Qi, hereby it is achieved that entering to top gas Row makes full use of, it is to avoid waste unreacted reducibility gas.
In order to solve the above technical problems, the technical solution adopted by the present invention is:
The invention provides a kind of quick reduction reactor, including:Feed zone, reduction section and the cooling set gradually from top to bottom Heating system is provided with section, the reduction section, makes the heat of miberal powder and reducing gas progress reduction reaction in reactor for producing Amount;The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, wherein, the air-cooled sections bottom is set There is air distribution plate, preliminary cooling treatment is carried out to hot reduzate for introducing reducing gas;The surrounding in the water cooling region is set There is water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth.
On the other hand, the invention provides a kind of quick reduction reaction system of water-cooled miberal powder, including:Quick reduction is anti- Answer device, heating system and go back Primordial Qi system, wherein, the quick reduction reactor includes the charging set gradually from top to bottom The heating system is provided with section, reduction section and cooling section, the reduction section, makes miberal powder and also Primordial Qi in reactor for producing Body carries out the heat of reduction reaction;The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, wherein, The air-cooled sections bottom is provided with air distribution plate, and preliminary cooling treatment is carried out to hot reduzate for introducing reducing gas;Institute That states water cooling region is surrounded by water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth;The also Primordial Qi system, Including exhaust gas processing device and reduction gas storage tank, wherein, the reduction offgas outlet of the exhaust gas processing device respectively with reactor With the reduction gas storage tank connection, the reduction tail gas for being discharged to reactor is handled, and obtains unreacted reducing gas; The reduction gas storage tank is connected through also Primordial Qi air intake valve with air distribution plate, and the also Primordial Qi system also includes brand-new also Primordial Qi gas Source, the reduction gas storage tank is provided with brand-new also Primordial Qi entrance connection brand-new also Primordial Qi source of the gas.Reducing gas storage tank is used for unreacted Reducing gas mixed with new reducing gas, and by mixed reducing gas via reactor air-cooled region carry out heat Exchange.
Inventor's discovery, a kind of quick reduction reaction system of water-cooled miberal powder of the present invention, compared with gas-based shaft kiln, The system can handle powdery miberal powder, produce DRI for powder ore, save the processes such as pelletizing, drying, roasting, whole Individual technological process is simpler, and process is easily-controllable, simultaneously as powdered ore powder footpath is small, it is big with reducing gas contact area, the two Between chemical reaction rate accelerate, increase feed throughput, in addition, quick reduction apparatus is used as heat using heat accumulation type radiant tube Source, the efficiency of heating surface is high, while the dustiness in reduction tail gas can be reduced;Compared with reducing fluid bed, quick reduction reaction system System need to only control combustion gas, air mass flow to control the temperature in reactor, simple to operate, while fluidized reduction method can be avoided In the shut-down that causes of " bond defluidization " phenomenon, can effectively reduce the energy consumption of the quick reducing process of miberal powder, mitigate at reduction tail gas Manage the burden of equipment;Reduction tail gas after reduction is after cleaning dust cooling, gas compression, carbonization treatment, and what is obtained is rich in CO2Reduction tail gas feeding reduction tail gas storage tank, and obtained unreacted reducing gas then send into reduction gas storage tank in brand-new Also Primordial Qi is mixed, hereby it is achieved that being made full use of to top gas, it is to avoid waste unreacted reducibility gas.
According to a particular embodiment of the invention, the heating system includes multiple heat accumulation type radiant tubes, each heat accumulating type spoke Pipe is penetrated vertically to be disposed side by side in the reduction section;The side wall of the reduction section is provided with and the heat accumulation type radiant tube Fuel gas inlet, air intake and the exhanst gas outlet being connected.
According to a particular embodiment of the invention, the reduction gas storage tank also includes newly also Primordial Qi entrance, for new to be gone back Primordial Qi is passed through in the reduction gas storage tank and mixed with unreacted reducing gas.
According to a particular embodiment of the invention, the also Primordial Qi system also includes blower fan, the air inlet of the blower fan and institute Also Primordial Qi air intake valve connection is stated, gas outlet be connected with the air distribution plate, for mixing reducing gas to be passed through and described quickly goes back The air-cooled region of former reactor.
According to a particular embodiment of the invention, the also Primordial Qi system also includes nitrogen air intake valve and nitrogen storage tank, institute State nitrogen air intake valve one end to be connected with the nitrogen storage tank, the other end is connected with the air inlet of the blower fan, for controlling nitrogen Gas enters reactor and carries out air displacement, it is ensured that enters whole system before reactor in reducing gas and is in nonoxidizing atmosphere.
According to a particular embodiment of the invention, the exhaust gas processing device includes wash cooling device, compression set and taken off Carbon device, wherein, the wash cooling device is connected with reduction offgas outlet, and the reduction tail gas for being discharged to reactor is carried out Washing, cooling treatment;The compression set is connected with the wash cooling device, for the gas that will be discharged to wash cooling device Body is compressed processing;The decarbonization device is connected with the compression set and the reduction gas storage tank respectively, for that will compress Gas afterwards carries out carbonization treatment, and obtained unreacted reducing gas is passed into also Primordial Qi in the reduction gas storage tank and new Body is mixed;The also Primordial Qi system also includes reduction tail gas storage tank, is connected with the decarbonization device, for decarbonization device to be obtained Be rich in CO2Reduction tail gas stored.
According to a particular embodiment of the invention, in addition to the discharging system, including miberal powder feed system and also originate in Thing discharge system, wherein, the miberal powder feed system is carried including raw material cabin, bucket, upper push-pull valve, underthrust plate valve, material leakage are bored and is shaken Dynamic Cloth sieve, wherein, the top carried respectively with raw material cabin and reactor of struggling against is connected, for carrying material;The upper push-pull valve, under Push-pull valve, material leakage cone and Vibrating Distribution Screen are set in turn in the feed zone from top to bottom, by the upper push-pull valve with The alternating of push-pull valve is opened and closed, and material envelope is carried out to the reactor;The reduzate discharge system, including drawing mechanism And storage bin, the drawing mechanism is connected with the discharging opening and the storage bin of the quick reduction reactor respectively, for inciting somebody to action Reduzate after being cooled down in reactor transports storage bin via drawing mechanism and stored.
Meanwhile, present invention also offers a kind of production method using the quick reduction reaction system of above-mentioned water-cooled miberal powder, Comprise the following steps:
(1)Produce the preparation before starting:First, air-tight test is carried out to system, it is ensured that the sealing of whole system;So Afterwards, air displacement is carried out to reactor, opens nitrogen air intake valve, nitrogen carries out nitrogen purging through air distribution plate, it is ensured that whole system System is in nonoxidizing atmosphere;Finally, the temperature of reduction section is set, realized pair also by adjusting heat that heating system provides The accurate temperature controlling of former process;
(2)Reduction phase:After temperature of reactor reaches setting value and keeps stable, nitrogen air intake valve is closed, reduction is opened Gas air intake valve, makes reducing gas enter reactor reduction section, afterwards again by miberal powder via feed system, reactor feed Duan Tian It is added to reduction section;The reducing gas in gas storage tank is reduced via the air distribution plate in air-cooled region even into cooling section, is then risen Reduction reaction is carried out to reduction section and miberal powder, hot reduzate and reduction tail gas is obtained;
(3)Product processing:Cooling section is fallen under the hot reduzate, is carried out just via the reducing gas in air-cooled region successively Walk cooling treatment, the water-cooling wall in water cooling region carries out reducing temperature twice processing, the reduzate after being cooled down, via reactor Discharging opening enters discharge system;Meanwhile, the reducing gas in the air-cooled region is carried out after pre-add heat treatment by hot reduzate Rise to reduction section and carry out reduction reaction with miberal powder, realize energy exchange;The reduction tail gas rises to reduction offgas outlet row Go out reactor, handled via exhaust gas processing device progress and obtain unreacted reducing gas, by itself and one piece new of reducing gas It is passed through after being mixed in reduction gas storage tank and is passed through reactor participation reduction reaction via air distribution plate again, realizes following for reduction tail gas Ring is recycled.
According to a particular embodiment of the invention, step(2)The fill process of middle feed system includes:Miberal powder in raw material cabin Push-pull valve in reactor head, opening is promoted to by bucket, miberal powder under charging aperture via dropping down onto on lower plugboard valve, then, closed Close push-pull valve, open underthrust plate valve, the powder between two push-pull valves is bored successively via material leakage, drop down onto under Vibrating Distribution Screen Reduction section, material leakage cone avoids miberal powder from assembling, it is ensured that the smoothness that miberal powder falls;Then, close in underthrust plate valve, opening Push-pull valve, which makes to be deposited in, to be dropped down onto under the powder on push-pull valve on lower plugboard valve, and charging is so repeated, passes through upper push-pull valve Used cooperatively with the alternating of underthrust plate valve, it is ensured that powder reactor in dropping process is in sealing state from beginning to end.
According to a particular embodiment of the invention, step(2)In reduction section burner hearth be heated system be heated to 900- 1200℃;Step(3)In generation hot reduzate behind air-cooled region temperature be down to 600-900 DEG C, by water cooling Temperature is down to normal temperature behind region, meanwhile, the reducing gas in air-cooled region is preheated to 300-600 DEG C, realizes reverse energy and hands over Change.
Beneficial effects of the present invention are as follows:
(1)The invention provides a kind of quick reduction reactor and the quick reduction reaction system and method for water-cooled miberal powder, pin DRI is produced to powder ore, easy to operate, process is easily-controllable.
(2)The quick reduction reaction system of water-cooled miberal powder of the present invention, compared with gas-based shaft kiln, the system can be located Powdery miberal powder is managed, the processes such as pelletizing, drying, roasting are saved, whole technological process is simpler, and process is easily-controllable, simultaneously as powder Shape miberal powder particle diameter is small, big with reducing gas contact area, and the chemical reaction rate between the two is accelerated, and increases feed throughput, separately Outside, quick reduction apparatus is using heat accumulation type radiant tube as thermal source, and the efficiency of heating surface is high, while containing in reduction tail gas can be reduced Dust quantity.
(3)The quick reduction reaction system of a kind of water-cooled miberal powder of the present invention, it is quick to go back compared with reducing fluid bed Former reaction system need to only control combustion gas, air mass flow to control the temperature in reactor, simple to operate, while fluidization can be avoided The shut-down that " bonding defluidization " phenomenon is caused in restoring method, can effectively reduce the energy consumption of the quick reducing process of miberal powder, mitigate also The burden of former tail gas treatment device.
(4)The invention provides a kind of quick reduction reactor and the quick reduction reaction system of water-cooled miberal powder and side Method, the reduction tail gas after reduction is after cleaning dust cooling, gas compression, carbonization treatment, and what is obtained is rich in CO2Go back protocercal tail Pneumatic transmission enters to reduce tail gas storage tank, and obtained unreacted reducing gas is then sent into reduction gas storage tank and mixed with brand-new also Primordial Qi, Hereby it is achieved that being made full use of to top gas, it is to avoid waste unreacted reducibility gas.
Brief description of the drawings
Fig. 1 is process chart of the invention.
Wherein, 1, raw material cabin, 2, bucket carry, 3, upper push-pull valve, 4, underthrust plate valve, 5, material leakage cone, 6, Vibrating Distribution Screen, 7, fast Fast reduction reactor, 8, heat accumulation type radiant tube, 9, fuel gas inlet, 10, combustion air inlet, 11, exhanst gas outlet, 12, air distribution plate, 13rd, water-cooling wall, 14, discharging spiral, 15, product feed bin, 16, wash cooling device, 17, compression set, 18, decarbonization device, 19, Reduce tail gas storage tank, 20, reduction gas storage tank, 21, nitrogen storage tank, 22, also Primordial Qi air intake valve, 23, nitrogen air intake valve, 24, Blower fan, 25, reduction offgas outlet.
Embodiment
Embodiments of the invention are described below in detail.The embodiments described below is exemplary, is only used for explaining this hair It is bright, and be not considered as limiting the invention.Unreceipted particular technique or condition in embodiment, according to text in the art Offer described technology or condition or carried out according to product description.Agents useful for same or the unreceipted production firm person of instrument, For can be by the conventional products of acquisition purchased in market.
In the description of the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not It is interpreted as indicating or implies relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " the One ", one or more this feature can be expressed or be implicitly included to the feature of " second ".In the description of the invention, " multiple " are meant that two or more, unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc. Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally;Can be that machinery connects Connect or electrically connect;Can be joined directly together, can also be indirectly connected to by intermediary, can be in two elements The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to specific feelings Condition understands the concrete meaning of above-mentioned term in the present invention.
According to an aspect of the present invention, the invention provides a kind of quick reduction reactor, including:From top to bottom successively Heating system is provided with feed zone, reduction section and the cooling section of setting, the reduction section, for produce make in reactor miberal powder and Reducing gas carries out the heat of reduction reaction;The cooling section includes the air-cooled region and water cooling area set gradually from top to bottom Domain, wherein, the air-cooled sections bottom is provided with air distribution plate, and hot reduzate is tentatively cooled down for introducing reducing gas Processing;The water cooling region is surrounded by water-cooling wall, heat for reduzate in absorbing reaction device burner hearth.
According to another aspect of the present invention, the invention provides a kind of quick reduction reaction system of water-cooled miberal powder, bag Include:Quick reduction reactor 7, heating system and also Primordial Qi system, wherein, the quick reduction reactor include from top to bottom according to Heating system is provided with feed zone, reduction section and the cooling section of secondary setting, the reduction section, makes miberal powder in reactor for producing The heat of reduction reaction is carried out with reducing gas;The cooling section includes the air-cooled region and water cooling area set gradually from top to bottom Domain, wherein, the air-cooled sections bottom is provided with air distribution plate 12, preliminary to the progress of hot reduzate cold for introducing reducing gas But handle;The water cooling region is surrounded by water-cooling wall, heat for reduzate in absorbing reaction device burner hearth;It is described to go back Primordial Qi system, including exhaust gas processing device and reduction gas storage tank, wherein, the reduction of the exhaust gas processing device respectively with reactor Offgas outlet 25 and the reduction gas storage tank 20 are connected, and the reduction tail gas for being discharged to reactor is handled, and obtains not anti- The reducing gas answered;The reduction gas storage tank is connected through also Primordial Qi air intake valve with air distribution plate 12, and the also Primordial Qi system is also wrapped Brand-new also Primordial Qi source of the gas is included, the reduction gas storage tank is provided with brand-new also Primordial Qi entrance connection brand-new also Primordial Qi source of the gas.In reactor The reduction tail gas progress of discharge, which is handled, to be obtained after unreacted reducing gas, and reduction gas storage tank is used for unreacted reducing gas Mixed with new reducing gas, and mixed reducing gas is subjected to heat exchange via the air-cooled region of reactor.
Inventor's discovery, a kind of quick reduction reaction system of water-cooled miberal powder of the present invention, compared with gas-based shaft kiln, The system can handle powdery miberal powder, produce DRI for powder ore, save the processes such as pelletizing, drying, roasting, whole Individual technological process is simpler, and process is easily-controllable, simultaneously as powdered ore powder footpath is small, it is big with reducing gas contact area, the two Between chemical reaction rate accelerate, increase feed throughput, in addition, quick reduction apparatus is used as heat using heat accumulation type radiant tube Source, the efficiency of heating surface is high, while the dustiness in reduction tail gas can be reduced;Compared with reducing fluid bed, quick reduction reaction system System need to only control combustion gas, air mass flow to control the temperature in reactor, simple to operate, while fluidized reduction method can be avoided In the shut-down that causes of " bond defluidization " phenomenon, can effectively reduce the energy consumption of the quick reducing process of miberal powder, mitigate at reduction tail gas Manage the burden of equipment;Reduction tail gas after reduction is after cleaning dust cooling, gas compression, carbonization treatment, and what is obtained is rich in CO2Reduction tail gas feeding reduction tail gas storage tank, and obtained unreacted reducing gas then send into reduction gas storage tank in brand-new Also Primordial Qi is mixed, hereby it is achieved that being made full use of to top gas, it is to avoid waste unreacted reducibility gas.
The quick reduction reaction system of a kind of water-cooled miberal powder of the present invention, including also Primordial Qi system, for reaction The reduction tail gas of device discharge obtains unreacted reducing gas after being handled so that the unreacted reducing gas with it is new Reducing gas mixing reenters reactor and carries out reduction reaction.According to a particular embodiment of the invention, the also Primordial Qi system, Including exhaust gas processing device and reduction gas storage tank 20, wherein, the exhaust gas processing device goes out with the reduction tail gas of reactor respectively Mouth 25 and the reduction gas storage tank connection, the reduction tail gas for being discharged to reactor are handled, and obtain unreacted reduction Gas;The reduction gas storage tank is connected through also Primordial Qi air intake valve 22 with air distribution plate 12, and the also Primordial Qi system also includes brand-new Also Primordial Qi source of the gas, the reduction gas storage tank is provided with brand-new also Primordial Qi entrance connection brand-new also Primordial Qi source of the gas.When most starting production, Reducing gas is supplied to reduce miberal powder by brand-new also Primordial Qi source of the gas, the reduction tail gas discharged in reactor is handled not anti- After the reducing gas answered, reduction gas storage tank is used for the new reduction by unreacted reducing gas and brand-new also Primordial Qi source of the gas supply Gas mixing, and mixed reducing gas is subjected to heat exchange via the air-cooled region of reactor.
According to a particular embodiment of the invention, the exhaust gas processing device includes wash cooling device 16, compression set 17 With decarbonization device 18, the reduction tail gas for being discharged to reactor is handled, isolated unreacted reducing gas and Rich in CO2Reduction tail gas.The reduction offgas outlet of the entrance of the wash cooling device and the quick reduction reactor 7 connects Connect, the reduction tail gas for being discharged to reactor is washed, cooling treatment;The entrance of the compression set and the washing are cold But the outlet connection of device, for processing will to be compressed to the gas that wash cooling device is discharged;The decarbonization device enters Mouthful be connected, for the gas progress carbonization treatment after the compression of discharging compression set, separate with the outlet of the compression set Obtained unreacted reducing gas and rich in CO2Reduction tail gas;The decarbonization device reducing gas outlet with it is described The recovery reducing gas entrance connection of gas storage tank is reduced, the unreacted reducing gas for decarbonization device to be discharged is passed into institute State in reduction gas storage tank, mixed in the reduction gas storage tank with new reducing gas.According to a particular embodiment of the invention, institute Stating also Primordial Qi system also includes reduction tail gas storage tank 19, the reaction gas of the entrance and the decarbonization device of the reduction tail gas storage tank Body outlet connection, CO is rich in for obtain decarbonization device2Reduction tail gas stored.Hereby it is achieved that pair going back protocercal tail Gas is separated, and obtains unreacted reducing gas and be discharged into reduction tail gas storage tank to carry out mixing place with new reducing gas Reason, is laid in as the reducing gas resource of reactor, to ensure to reduce recycling for tail gas, can mitigate whole system The energy consumption of the burden of middle tail gas treatment device, effectively reduction direct-reduction technique;And isolated is rich in CO2Go back protocercal tail Gas, is passed into reduction tail gas storage tank and is stored, and reduces waste gas discharge, environmentally friendly.
According to a particular embodiment of the invention, the reduction gas storage tank 20 includes reducing gas outlet and reclaims reducing gas Entrance, the recovery reducing gas entrance of the reduction gas storage tank is connected with the reducing gas outlet of the decarbonization device, described to go back The reducing gas outlet of Primordial Qi storage tank is connected with the quick reduction reactor 7, in the reduction tail gas of discharging reactor Unreacted reducing gas is obtained after handling via the exhaust gas processing device to be stored and collected, and realizes unreacted reduction Gas, which is again introduced into reactor, carries out reduction reaction, it is ensured that the cycling and reutilization of reduction tail gas;It is preferred that, the also Primordial Qi storage The reducing gas outlet of tank is connected through also Primordial Qi air intake valve with the air distribution plate 12 of the reactor, for by unreacted reduction Gas carries out heat exchange via the air-cooled region of reactor.Further, the reduction gas storage tank also enters including newly also Primordial Qi Mouthful, the new also Primordial Qi entrance of the reduction gas storage tank is connected with reduction device of air, for new also Primordial Qi to be passed through into the reduction Mixed in gas storage tank with unreacted reducing gas, and mixed reducing gas is subjected to heat via the air-cooled region of reactor Amount is exchanged.
According to a particular embodiment of the invention, the also Primordial Qi system also includes blower fan 24, nitrogen air intake valve 23 and nitrogen Gas storage tank 21, for controlling reducing gas and nitrogen to adjust the atmosphere of whole system.Described nitrogen air intake valve one end and institute The outlet connection of nitrogen storage tank is stated, the other end is connected with the air inlet of the blower fan, for controlling nitrogen to be carried out into reactor Air is replaced, it is ensured that is entered whole system before reactor in reducing gas and is in nonoxidizing atmosphere.The blower fan, air inlet can To be connected with also Primordial Qi air intake valve 22 or the nitrogen air intake valve, the gas outlet of the blower fan and the air distribution plate Connection, for guiding reducing gas or nitrogen to be transported in reactor;Wherein, the air inlet when the blower fan and the reduction When gas air intake valve 22 is connected, the gas outlet of the blower fan is connected with the air distribution plate, for mixing reducing gas to be passed through into institute State the air-cooled region of quick reduction reactor;Be connected with the nitrogen air intake valve when the air inlet of the blower fan, the blower fan Gas outlet be connected with the air distribution plate, for nitrogen is passed through the quick reduction reactor air-cooled region carry out air put Change, it is ensured that enter whole system before reactor in reducing gas and be in nonoxidizing atmosphere.
The course of work of the also Primordial Qi system is as follows:
1st, nitrogen purge:Need to carry out whole system nitrogen purging before also Primordial Qi enters reactor, it is whole to ensure Individual system is in nonoxidizing atmosphere.When nitrogen is purged, also Primordial Qi air intake valve is closed, nitrogen air intake valve is opened, then Blower fan is opened, the nitrogen in nitrogen storage tank is entered in quick reduction reactor.
2nd, reducing gas course of conveying:Nitrogen purging is finished, and closes nitrogen air intake valve, opens also Primordial Qi air intake valve, Then the reducing gas in blower fan, reduction gas storage tank is opened by air distribution plate even into quick reduction reactor, is gone back Original reaction.
3rd, vent gas treatment process is reduced:Quick reduction reactor is completed after reduction reaction, discharge reduction tail gas.Participate in reaction Reduction tail gas afterwards sequentially enters wash cooling device and carries out wash cooling processing, compression set from reduction offgas outlet discharge It is compressed processing, decarbonization device to carry out after carbonization treatment, obtains unreacted reducing gas and rich in CO2Reduction tail gas; Wherein, what is obtained is rich in CO2Reduction tail gas enter reduction tail gas storage tank and be collected storage, obtain unreacted is and Primordial Qi Body enters to be mixed in reduction gas storage tank with new reducing gas, enters reactor via also Primordial Qi air intake valve, blower fan again It is middle to be reduced.Hereby it is achieved that being recycled to reduction tail gas, bearing for tail gas treatment device in whole system can be mitigated The energy consumption of load, effectively reduction direct-reduction technique.
The invention provides a kind of quick reduction reaction system of water-cooled miberal powder, including quick reduction reactor 7, for pair Miberal powder carries out direct-reduction processing, obtains reduction tail gas and reduzate.According to a particular embodiment of the invention, it is described quickly to go back Former reactor includes feed zone, reduction section and the cooling section set gradually from top to bottom, and miberal powder is added to reactor by feed zone In, reduction reaction is carried out through reduction section and reducing gas, reduction tail gas and reduzate is obtained, the reduzate is via cooling Discharged after Duan Jinhang cooling treatments by discharging opening, the reduction tail gas is discharged into the also Primordial Qi system via reduction offgas outlet Exhaust gas processing device in.According to a particular embodiment of the invention, reduction tail gas is additionally provided with the side wall of reactor head to go out Mouthful, its discharge line connects the air inlet pipe of wash cooling device.
According to a particular embodiment of the invention, the reduction section, it is direct for miberal powder to be carried out positioned at the middle part of reactor Reduction, obtains reduzate and reduction tail gas.Heating system is provided with the reduction section, for produce make in reactor miberal powder and Reducing gas carries out the heat of reduction reaction.Further, the type of the heating system is not particularly limited, as long as can be Reactor provides stable reaction temperature, can be that the heat accumulating type system that multiple heat accumulation type radiant tubes 8 are constituted is either more Heating system of individual high-temperature heating circle composition etc..It is preferred that, the reducing gas enters via the bottom of the reduction section, institute State miberal powder via the top of the reduction section to enter, two kinds of raw materials are impacted by convection current, collided, are conducive to entering between the two Row fully contact, promotes miberal powder fully to be reduced;Obtained reduzate is constantly fallen due to self gravitation, via reduction section Bottom discharge to cooling section carry out cooling treatment;Obtained reduction tail gas constantly freely rises, and is arranged via the top of reduction section Go out, be then discharged into via the reduction offgas outlet positioned at reactor head side wall in wash cooling device.
According to a particular embodiment of the invention, the cooling section, positioned at the bottom of reactor, for also being originated in what is obtained Thing carries out cooling treatment.The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, successively to obtaining Reduzate carry out cooling treatment.The air-cooled sections bottom is provided with air distribution plate 12, is gone back for introducing reducing gas to hot Originate in thing and carry out preliminary cooling treatment, in order to which the hot reduzate generated and the normal temperature having just enter into reactor will be reacted also Raw-gas carries out heat exchange processing, the reduzate tentatively cooled down and pre-warmed reducing gas;Wherein, the preliminary cooling Reduzate constantly fallen due to self gravitation, carry out secondary cooling processing into water cooling region;The pre-warmed reduction Gas constantly freely rises, and enters reduction section and carries out reduction treatment to miberal powder;Thus, the heat exchange processing in air-cooled region, both real The preliminary cooling to hot reduzate is showed, has been conducive to the reducing gas after preheating to enter again and is rapidly heated after reduction section and anti- Should, the heat of reduzate is taken full advantage of, the energy expenditure of production process is reduced, production cost is reduced.The water cooling region Be surrounded by water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth;Wherein, water-cooling wall 13 is water cooling region Important component, is distributed in reactor bottom surrounding, the water or steam of flowing is in inside, the heat for absorbing reduzate in burner hearth Amount, realizes the reducing temperature twice of reduzate.According to a particular embodiment of the invention, the shape of the cooling section is not limited specifically System, as long as reduzate can be made smoothly to fall.Further, the cooling section is tapered, is conducive to reduzate profit Constantly fallen with self gravitation and carry out comprehensive cooling treatment.
According to a particular embodiment of the invention, the feed zone, positioned at the top of reactor, for miberal powder to be added to instead Answer and reduction treatment is carried out in device.The feed zone includes upper push-pull valve 3, underthrust plate valve 4, material leakage cone 5 and shaken successively from top to bottom Dynamic Cloth sieve 6, is opened and closed by the alternating of the upper push-pull valve and underthrust plate valve, in charging to the reactor head Charging aperture is closed in turn;Thus, while ensureing that miberal powder falls smooth, also to ensure to react in miberal powder dropping process The sealing of device.
The course of work of the quick reduction reactor is as follows:
1st, miberal powder is added in reactor via the feed zone of reactor head.First, push-pull valve in opening, miberal powder is via charging Dropped down onto under mouthful on lower plugboard valve, then, push-pull valve in closings, opening underthrust plate valve makes powder between two push-pull valves successively Bored via material leakage, reduction section dropped down onto under Vibrating Distribution Screen, material leakage cone avoids miberal powder from assembling, it is ensured that miberal powder whereabouts it is smooth Property;Then, push-pull valve, which makes to be deposited in, in closing underthrust plate valve, opening drops down onto under the powder on push-pull valve on lower plugboard valve, such as Charging is repeated in this, is used cooperatively by the alternating of upper push-pull valve and underthrust plate valve, it is ensured that powder is anti-in dropping process Device is answered to be in sealing state from beginning to end.
2nd, miberal powder in the reactor portion reduction section carry out reduction treatment.Under the heat effect of heating system, reduction section Internal furnace temperature is higher(It is preferred that, the burner hearth of reduction section is heated system and is heated to 900-1200 DEG C), it is entering for reduction reaction Row provides advantage.Miberal powder freely falls to cooling section via reduction section, and reducing gas is preheated via cooling section(Also Raw-gas is preheated to 300-600 DEG C)Reduction section is freely risen to afterwards, and both occur impact by convection, fully Contact, chemically reacts, and obtains reduzate and reduction tail gas;Obtained reduzate is constantly fallen due to self gravitation, Via the bottom discharge of reduction section cooling treatment is carried out to cooling section;Obtained reduction tail gas constantly freely rises, via reduction The top discharge of section, is then discharged into wash cooling device via the reduction offgas outlet positioned at reactor head side wall.Its In, the reaction mechanism of miberal powder and reducibility gas is:MexOy+CO→Me+CO2, MexOy+H2→Me+H2O.Due to miberal powder particle diameter Small, heat transfer condition and reacting dynamics condition are substantially improved between gas-solid, and reduction reaction can be completed within the several seconds, are realized directly The quick production process of reduced iron.
3rd, miberal powder carries out cooling treatment in the cooling section of reactor bottom.The reduzate that reduction section is obtained is hot reduction Product, first, carries out preliminary cooling processing, i.e., described hot reduzate via air distribution plate with just uniformly entering into air-cooled region Enter and exchanged heat between the normal temperature reducing gas in reactor so that the temperature of hot reduzate is down to 600-900 DEG C, with this Meanwhile, reducing gas is preheated to 300-600 DEG C;Then, enter via the reduzate of preliminary cooling processing into water cooling region Row reducing temperature twice processing, i.e., heat exchange when passing through water-cooling wall via the reduzate of preliminary cooling processing is handled so that be distributed in The water-cooling wall of reactor bottom surrounding can effectively absorb the heat of reduzate in burner hearth, obtain temperature and be down to going back for normal temperature Thing is originated in, the reducing temperature twice of reduzate is realized.Obtained normal temperature reduzate is discharged via the discharging opening of reactor.
The invention provides a kind of quick reduction reaction system of water-cooled miberal powder, including heating system, for for reactor Heat needed for miberal powder progress reduction treatment is provided.The heating system is arranged in the reduction section of the reactor, for producing It is raw to make miberal powder and the heat of reducing gas progress reduction reaction in reactor.According to a particular embodiment of the invention, the heating System includes multiple heat accumulation type radiant tubes 8, and each heat accumulation type radiant tube is vertically disposed side by side in the reduction section, had Uniformly heated beneficial to miberal powder in reduction section and reducing gas, it is to avoid temperature distributing disproportionation present in reaction compartment is even Problem, meanwhile, also help miberal powder and fallen using free gravity, it is unobstructed, it is ensured that miberal powder falls smooth.The reduction section Side wall is provided with fuel gas inlet 9, air intake 10 and the exhanst gas outlet 11 being connected with the heat accumulation type radiant tube, the combustion gas Entrance is used to input combustion gas, and the air intake is combustion air inlet 10, and for inputting combustion air, the exhanst gas outlet is used In output flue gas so that combustion gas and air, which enter, occurs combustion reaction in heat accumulation type radiant tube, the high-temperature flue gas of generation is to reaction Device is discharged after being heated;It is preferred that, the heat that combustion gas and air burning are produced mainly is passed heat in the way of radiation Miberal powder and reducing gas in reactor are passed, the combustion gas in reduction reaction acquisition reduzate, heat accumulation type radiant tube is brought it about Running system is isolated from one another with reduction flow of air system in reactor, does not interfere with the reduction process in reactor.Further , the gas flow that can be passed through heat accumulation type radiant tube by regulation can accurately control the temperature field in reactor, thus may be used To control reactor temperature number and thermograde, the accurate temperature controlling to reduction process in reactor is realized.Thus, institute Heating system is stated, realizes and miberal powder in reduction section and reducing gas is uniformly heated, it is to avoid be warm present in reaction compartment The problem of spending skewness, meanwhile, also help miberal powder and fallen using free gravity, it is unobstructed, it is ensured that miberal powder falls suitable Freely.
The invention provides a kind of quick reduction reaction system of water-cooled miberal powder, in addition to the discharging system, it is used for Pan feeding and discharging processing are carried out to reactor.According to a particular embodiment of the invention, the discharging system is fed including miberal powder System and reduzate discharge system, the miberal powder feed system are used for reactor conveying mineral powder, the reduzate discharging The reduzate that system is used to discharge reactor carries out output processing.The miberal powder feed system include raw material cabin 1, bucket carry 2, Upper push-pull valve 3, underthrust plate valve 4, material leakage cone 5 and Vibrating Distribution Screen 6.The bucket puies forward top phase respectively with raw material cabin and reactor Even, for carrying material.The upper push-pull valve, underthrust plate valve, material leakage cone and Vibrating Distribution Screen enter described in being set in turn in from top to bottom Expect in section, opened and closed by the alternating of the upper push-pull valve and underthrust plate valve, material envelope is carried out to the reactor, moreover, The powder being deposited on push-pull valve further enhances sealing effectiveness, realizes " material envelope ", meanwhile, the cooperation of two push-pull valves Use, it is ensured that powder reactor in dropping process is in sealing state from beginning to end.Material leakage bore, be arranged on underthrust plate valve and Between Vibrating Distribution Screen, Vibrating Distribution Screen is dropped down onto under the miberal powder between two push-pull valves is bored by material leakage under gravity During, the material leakage cone of arrangement in the reactor avoids the aggtegation of miberal powder, it is ensured that the smoothness that miberal powder falls.Vibration Sieve, passes through effect of vibration so that reduction section of the miberal powder even into reactor.The reduzate discharge system, including discharging Device 14 and storage bin 15, the secondary cooling reduzate discharged for transport reactor discharging opening.The drawing mechanism difference It is connected with the discharging opening and the storage bin of the quick reduction reactor, for the reduzate after being cooled down in reactor to be passed through Storage bin is transported by drawing mechanism to be stored.Further, the drawing mechanism 14 is discharging spiral 14;The storage bin 15 be product feed bin 15.
According to another aspect of the present invention, present invention also offers one kind, using above-mentioned water-cooled miberal powder, quickly reduction is anti- The production method of system is answered, is comprised the following steps:
(1)Produce the preparation before starting:First, air-tight test is carried out to system, it is ensured that the sealing of whole system;So Afterwards, air displacement is carried out to reactor, opens nitrogen air intake valve, nitrogen carries out nitrogen purging through air distribution plate, it is ensured that whole system System is in nonoxidizing atmosphere;Finally, the temperature of reduction section is set, realized pair also by adjusting heat that heating system provides The accurate temperature controlling of former process.
According to a particular embodiment of the invention, the miberal powder feed system include raw material cabin, bucket carry, upper push-pull valve, underthrust Plate valve, material leakage cone and Vibrating Distribution Screen, for reactor conveying mineral powder.The upper push-pull valve, underthrust plate valve, material leakage are bored and shaken Dynamic Cloth sieve is set in turn in the feed zone from top to bottom, opened by the alternating of the upper push-pull valve and underthrust plate valve and Close, material envelope is carried out to the reactor, moreover, the powder being deposited on push-pull valve further enhances sealing effectiveness, it is real Existing " material envelope ", meanwhile, two push-pull valves are used cooperatively, it is ensured that powder reactor in dropping process is in from beginning to end Sealing state.
According to a particular embodiment of the invention, the also Primordial Qi system also includes blower fan, nitrogen air intake valve and nitrogen storage Tank, for controlling reducing gas and nitrogen to adjust the atmosphere of whole system.Described nitrogen air intake valve one end and the nitrogen The outlet connection of storage tank, the other end is connected with the air inlet of the blower fan, is put for controlling nitrogen to enter reactor progress air Change, it is ensured that enter whole system before reactor in reducing gas and be in nonoxidizing atmosphere.
According to a particular embodiment of the invention, the heating system is arranged in the reduction section of the reactor, for producing It is raw to make miberal powder and the heat of reducing gas progress reduction reaction in reactor.The heating system is radiated including multiple heat accumulating types Pipe, each heat accumulation type radiant tube is vertically disposed side by side in the reduction section, is conducive to miberal powder in reduction section and is gone back Raw-gas is uniformly heated, it is to avoid the problem of temperature distributing disproportionation is even present in reaction compartment, meanwhile, also help miberal powder Fallen using free gravity, it is unobstructed, it is ensured that miberal powder falls smooth.The side wall of the reduction section is provided with and the heat accumulating type Fuel gas inlet, air intake and exhanst gas outlet that radiant tube is connected, the fuel gas inlet are used to input combustion gas, and the air enters Mouth is used for input air, and the exhanst gas outlet is used to export flue gas so that combustion gas and air, which enter in heat accumulation type radiant tube, to be occurred Combustion reaction, the high-temperature flue gas of generation is discharged after heating to reactor;It is preferred that, what combustion gas and air burning were produced Heat mainly transfers heat to miberal powder and reducing gas in reactor in the way of radiation, brings it about reduction reaction and is gone back Thing is originated in, the fuel gas flow system in heat accumulation type radiant tube and reduction flow of air system in reactor are isolated from one another, Bu Huiying Ring the reduction process in reactor.Further, the gas flow that can be passed through heat accumulation type radiant tube by regulation can be accurate The temperature field in reactor is controlled, it is possible thereby to control reactor temperature number and thermograde, is realized to reactor The accurate temperature controlling of interior reduction process.
(2)Reduction phase:After temperature of reactor reaches setting value and keeps stable, nitrogen air intake valve is closed, is opened Also Primordial Qi air intake valve, makes reducing gas enter reactor reduction section, afterwards again by miberal powder via feed system, reactor feed Section is added to reduction section;The reducing gas in gas storage tank is reduced via the air distribution plate in air-cooled region even into cooling section, then Rise to reduction section and carry out reduction reaction with miberal powder, obtain hot reduzate and reduction tail gas.
According to a particular embodiment of the invention, the miberal powder feed system include raw material cabin, bucket carry, upper push-pull valve, underthrust Plate valve, material leakage cone and Vibrating Distribution Screen.The top carried respectively with raw material cabin and reactor of struggling against is connected, for carrying material.It is described Upper push-pull valve, underthrust plate valve, material leakage cone and Vibrating Distribution Screen are set in turn in the feed zone from top to bottom, on described The alternating of push-pull valve and underthrust plate valve is opened and closed, and material envelope is carried out to the reactor, moreover, being deposited on push-pull valve Powder further enhances sealing effectiveness, realizes " material envelope ", meanwhile, two push-pull valves are used cooperatively, it is ensured that powder exists Reactor is in sealing state from beginning to end in dropping process.Material leakage is bored, and is arranged between underthrust plate valve and Vibrating Distribution Screen, when During miberal powder between two push-pull valves drops down onto Vibrating Distribution Screen under being bored under gravity by material leakage, reaction is arranged in Material leakage cone in device avoids the aggtegation of miberal powder, it is ensured that the smoothness that miberal powder falls.Vibratory sieve, by effect of vibration, So that reduction section of the miberal powder even into reactor.According to a particular embodiment of the invention, step(2)The charging of middle feed system Process includes:Miberal powder in raw material cabin is promoted to push-pull valve in reactor head, opening by bucket, and miberal powder is via under charging aperture Drop down onto on underthrust plate valve, then, push-pull valve in closing opens underthrust plate valve, make powder between two push-pull valves successively via Reduction section is dropped down onto under material leakage cone, Vibrating Distribution Screen, material leakage cone avoids miberal powder from assembling, it is ensured that the smoothness that miberal powder falls; Then, push-pull valve, which makes to be deposited in, in closing underthrust plate valve, opening drops down onto under the powder on push-pull valve on lower plugboard valve, so anti- Fed, used cooperatively by the alternating of upper push-pull valve and underthrust plate valve again, it is ensured that powder reactor in dropping process Sealing state is in from beginning to end.
Miberal powder is as follows via the specific work process of feed system:Miberal powder in raw material cabin is promoted to reactor by bucket Top, is added in reactor via the feed zone of reactor head.First, push-pull valve in opening, miberal powder is via under charging aperture Drop down onto on underthrust plate valve, then, push-pull valve in closing opens underthrust plate valve, make powder between two push-pull valves successively via Reduction section is dropped down onto under material leakage cone, Vibrating Distribution Screen, material leakage cone avoids miberal powder from assembling, it is ensured that the smoothness that miberal powder falls; Then, push-pull valve, which makes to be deposited in, in closing underthrust plate valve, opening drops down onto under the powder on push-pull valve on lower plugboard valve, so anti- Fed, used cooperatively by the alternating of upper push-pull valve and underthrust plate valve again, it is ensured that powder reactor in dropping process Sealing state is in from beginning to end.
According to a particular embodiment of the invention, the reduction gas storage tank reducing gas outlet is through also Primordial Qi air intake valve and institute The air distribution plate connection of reactor is stated, it is mixed to go back for unreacted reducing gas and new reducing gas to be mixed Raw-gas carries out heat exchange via the air-cooled region of reactor.Further, the air inlet of the blower fan and the also Primordial Qi Air intake valve is connected, when the gas outlet of the blower fan is connected with the air distribution plate, described fast for mixing reducing gas to be passed through The air-cooled region of fast reduction reactor carries out pre-add heat treatment.
According to a particular embodiment of the invention, the cooling section, positioned at the bottom of reactor, for also being originated in what is obtained Thing carries out cooling treatment.The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, successively to obtaining Reduzate carry out cooling treatment.The air-cooled sections bottom is provided with air distribution plate, for introducing reducing gas to hot reduction Product carries out preliminary cooling treatment, is reduced in order to react the hot reduzate of generation and the normal temperature having just enter into reactor Gas carries out heat exchange processing, the reduzate tentatively cooled down and pre-warmed reducing gas;Wherein, it is described tentatively to cool down Reduzate is constantly fallen due to self gravitation, and secondary cooling processing is carried out into water cooling region;The pre-warmed also Primordial Qi Body constantly freely rises, and enters reduction section and carries out reduction treatment to miberal powder;Thus, the heat exchange processing in air-cooled region, was both realized Preliminary cooling to hot reduzate, is conducive to the reducing gas after preheating to enter and is rapidly heated after reduction section and anti-again Should, the heat of reduzate is taken full advantage of, the energy expenditure of production process is reduced, production cost is reduced.
According to a particular embodiment of the invention, the reduction section, it is direct for miberal powder to be carried out positioned at the middle part of reactor Reduction, obtains reduzate and reduction tail gas.Heating system is provided with the reduction section, for produce make in reactor miberal powder and Reducing gas carries out the heat of reduction reaction.It is preferred that, the reducing gas enters via the bottom of the reduction section, the ore deposit Powder enters via the top of the reduction section, and two kinds of raw materials are impacted by convection current, collided, are conducive to being filled between the two Tap is touched, and promotes miberal powder fully to be reduced;Obtained reduzate is constantly fallen due to self gravitation, via the bottom of reduction section Portion is discharged into cooling section and carries out cooling treatment;Obtained reduction tail gas constantly freely rises, and is discharged via the top of reduction section, so By by being discharged into positioned at the reduction offgas outlet of reactor head side wall in wash cooling device.
Miberal powder is as follows in the specific work process that reduction section carries out reduction treatment:Miberal powder via reactor head feed zone It is added in reactor, the reduction section in portion carries out reduction treatment in the reactor.Under the heat effect of heating system, reduction section Internal furnace temperature is higher(It is preferred that, the burner hearth of reduction section is heated system and is heated to 900-1200 DEG C), it is entering for reduction reaction Row provides advantage.Miberal powder freely falls to reduction section via reduction section, and reducing gas is preheated via cooling section(Also Raw-gas is preheated to 300-600 DEG C)Reduction section is freely risen to afterwards, and both occur impact by convection, fully Contact, chemically reacts, and obtains reduzate and reduction tail gas;Obtained reduzate is constantly fallen due to self gravitation, Via the bottom discharge of reduction section cooling treatment is carried out to cooling section;Obtained reduction tail gas constantly freely rises, via reduction The top discharge of section, is then discharged into wash cooling device via the reduction offgas outlet positioned at reactor head side wall.Its In, the reaction mechanism of miberal powder and reducibility gas is:MexOy+CO→Me+CO2, MexOy+H2→Me+H2O.Due to miberal powder particle diameter Small, heat transfer condition and reacting dynamics condition are substantially improved between gas-solid, and reduction reaction can be completed within the several seconds, are realized directly The quick production process of reduced iron.Further, step(2)In reduction section burner hearth be heated system be heated to 900-1200 ℃。
(3)Product processing:Cooling section is fallen under the hot reduzate, is entered successively via the reducing gas in air-cooled region The preliminary cooling treatment of row, the water-cooling wall in water cooling region carry out reducing temperature twice processing, the reduzate after being cooled down, via reaction The discharging opening of device enters discharge system;Meanwhile, the reducing gas in the air-cooled region is carried out at preheating by hot reduzate Reduction section is risen to after reason and carries out reduction reaction with miberal powder, energy exchange is realized;The reduction tail gas rises to reduction tail gas and gone out Mouth discharge reactor, handles via exhaust gas processing device progress and obtains unreacted reducing gas, by itself and new reducing gas One piece be passed through reduction gas storage tank in mix after again via air distribution plate be passed through reactor participate in reduction reaction, realize reduction tail gas Cycling and reutilization.
According to a particular embodiment of the invention, the cooling section, positioned at the bottom of reactor, for also being originated in what is obtained Thing carries out cooling treatment.The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, successively to obtaining Reduzate carry out cooling treatment.The air-cooled sections bottom is provided with air distribution plate, for introducing reducing gas to hot reduction Product carries out preliminary cooling treatment, is reduced in order to react the hot reduzate of generation and the normal temperature having just enter into reactor Gas carries out heat exchange processing, the reduzate tentatively cooled down and pre-warmed reducing gas;Wherein, it is described tentatively to cool down Reduzate is constantly fallen due to self gravitation, and secondary cooling processing is carried out into water cooling region;The pre-warmed also Primordial Qi Body constantly freely rises, and enters reduction section and carries out reduction treatment to miberal powder;Thus, the heat exchange processing in air-cooled region, was both realized Preliminary cooling to hot reduzate, is conducive to the reducing gas after preheating to enter and is rapidly heated after reduction section and anti-again Should, the heat of reduzate is taken full advantage of, the energy expenditure of production process is reduced, production cost is reduced.The water cooling region Be surrounded by water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth;Wherein, water-cooling wall is the weight in water cooling region Part is wanted, reactor bottom surrounding is distributed in, the water or steam of flowing is in inside, the heat for absorbing reduzate in burner hearth Amount, realizes the reducing temperature twice of reduzate.According to a particular embodiment of the invention, the shape of the cooling section is not limited specifically System, as long as reduzate can be made smoothly to fall.Further, the cooling section is tapered, is conducive to reduzate profit Constantly fallen with self gravitation and carry out comprehensive cooling treatment.
According to a particular embodiment of the invention, the miberal powder feed system is used for reactor conveying mineral powder, the reduction The reduzate that product discharge system is used to discharge reactor carries out output processing.The reduzate discharge system, including Drawing mechanism and storage bin, the drawing mechanism connect with the discharging opening of the storage bin and the quick reduction reactor respectively Connect, stored for the reduzate after being cooled down in reactor to be transported into storage bin via drawing mechanism.
Miberal powder is as follows in the specific work process that cooling section carries out cooling treatment:Miberal powder enters in the cooling section of reactor bottom Row cooling treatment.The reduzate that reduction section is obtained is hot reduzate, first, is carried out into air-cooled region at preliminary cooling Reason, i.e., described hot reduzate and just changed via air distribution plate even between the normal temperature reducing gas in reactor Heat so that the temperature of hot reduzate is down to 600-900 DEG C, at the same time, and reducing gas is preheated to 300-600 DEG C;So Afterwards, enter water cooling region via the reduzate of preliminary cooling processing and carry out reducing temperature twice processing, i.e., handled via preliminary cooling Reduzate pass through water-cooling wall when heat exchange processing so that being distributed in the water-cooling wall of reactor bottom surrounding can effectively inhale The heat of reduzate in burner hearth is received, the reduzate that temperature is down to normal temperature is obtained, realizes the reducing temperature twice of reduzate.Obtain Normal temperature reduzate via reactor discharging opening discharge.
According to a particular embodiment of the invention, the also Primordial Qi system, including exhaust gas processing device and reduction gas storage tank, its In, the exhaust gas processing device includes wash cooling device, compression set and decarbonization device, for the reduction discharged to reactor Tail gas is handled, and obtains unreacted reducing gas.The entrance of the wash cooling device and the quick reduction reactor Reduction offgas outlet connection, the reduction tail gas for being discharged to reactor is washed, cooling treatment;The compression set Entrance is connected with the outlet of the wash cooling device, for will be compressed processing to the gas that wash cooling device is discharged; The entrance of the decarbonization device is connected with the outlet of the compression set, is entered for the gas after the compression of discharging compression set Row carbonization treatment, obtained unreacted reducing gas;Reducing gas outlet and the reduction gas storage tank of the decarbonization device The connection of recovery reducing gas entrance, the unreacted reducing gas for decarbonization device to be discharged is passed into the also Primordial Qi storage In tank, mixed in the reduction gas storage tank with new reducing gas.According to a particular embodiment of the invention, the also Primordial Qi system System also includes reduction tail gas storage tank, and the entrance of the reduction tail gas storage tank is connected with the reaction gas outlet of the decarbonization device, CO is rich in for obtain decarbonization device2Reduction tail gas stored.Hereby it is achieved that reduction tail gas is separated, Obtain unreacted reducing gas and be discharged into reducing gas progress mixed processing in reduction tail gas storage tank and new, be used as reactor Reducing gas resource laid in, recycled with ensureing to reduce tail gas, vent gas treatment in whole system can be mitigated set The energy consumption of standby burden, effectively reduction direct-reduction technique;And isolated is rich in CO2Reduction tail gas, be passed into also Stored in protocercal tail gas storage tank, reduce waste gas discharge, it is environmentally friendly.
According to a particular embodiment of the invention, the reduction gas storage tank includes reducing gas outlet and reclaims reducing gas to enter Mouthful, the recovery reducing gas entrance of the reduction gas storage tank is connected with the reducing gas outlet of the decarbonization device, the reduction The reducing gas outlet of gas storage tank is connected with the quick reduction reactor, in the reduction tail gas of discharging reactor via Unreacted reducing gas is obtained after the exhaust gas processing device processing to be stored and collected, and realizes unreacted reducing gas It is again introduced into reactor and carries out reduction reaction, it is ensured that the cycling and reutilization of reduction tail gas;It is preferred that, the reduction gas storage tank Reducing gas outlet is connected through also Primordial Qi air intake valve with the air distribution plate of the reactor, for unreacted reducing gas to be passed through Heat exchange is carried out by the air-cooled region of reactor.Further, the reduction gas storage tank also includes newly also Primordial Qi entrance, described The new also Primordial Qi entrance of reduction gas storage tank is connected with reduction device of air, for new also Primordial Qi to be passed through in the reduction gas storage tank Mixed with unreacted reducing gas, and mixed reducing gas is subjected to heat exchange via the air-cooled region of reactor.
The course of work that the reduction tail gas is recycled is as follows:Quick reduction reactor is completed after reduction reaction, Discharge reduction tail gas.Reacted reduction tail gas is participated in from reduction offgas outlet discharge, the progress of wash cooling device is sequentially entered Wash cooling processing, compression set are compressed processing, decarbonization device and carried out after carbonization treatment, obtain unreacted reducing gas With rich in CO2Reduction tail gas;Wherein, what is obtained is rich in CO2Reduction tail gas enter reduction tail gas storage tank be collected storage, Obtained unreacted reducing gas enters to be mixed in reduction gas storage tank with new reducing gas, again via also Primordial Qi intake valve Door, blower fan are entered in reactor and reduced.Hereby it is achieved that being recycled to reduction tail gas, whole system can be mitigated The energy consumption of the burden of tail gas treatment device in system, effectively reduction direct-reduction technique.
Inventor has found that the invention provides a kind of quick reduction reactor and the quick reduction reaction system of water-cooled miberal powder System and method, compared with gas-based shaft kiln, the system can handle powdery miberal powder, and DRI is produced for powder ore, save The processes such as pelletizing, drying, roasting are gone, whole technological process is simpler, and process is easily-controllable, simultaneously as powdered ore powder footpath is small, Big with reducing gas contact area, the chemical reaction rate between the two is accelerated, and increases feed throughput, in addition, quickly also original-pack Put using heat accumulation type radiant tube as thermal source, the efficiency of heating surface is high, while the dustiness in reduction tail gas can be reduced;Flowed with reduction Change bed to compare, quick reduction reaction system need to only control combustion gas, air mass flow to control the temperature in reactor, simple to operate, " bonding defluidization " shut-down that phenomenon is caused can be avoided in fluidized reduction method simultaneously, can effectively be reduced miberal powder and quickly be reduced work The energy consumption of skill, the burden for mitigating reduction tail gas treatment device;Reduction tail gas after reduction passes through cleaning dust cooling, gas pressure After contracting, carbonization treatment, wherein, what is obtained is rich in CO2Reduction tail gas feeding reduction tail gas storage tank, obtained unreacted also Primordial Qi Mixed in body feeding reduction gas storage tank with brand-new also Primordial Qi, hereby it is achieved that being made full use of to top gas, it is to avoid waste not The reducibility gas of reaction.
Embodiment one
The quick restoring method of the present embodiment Iron Ore Powder, comprises the following steps:
1st, iron ore concentrate is added at the top of the quick reduction apparatus of Iron Ore Powder;
2nd, the iron ore concentrate Iron grade is 65%, and the ratio that mineral powder granular particle diameter is less than 0.074mm is no less than 80%;
3rd, heat accumulation type radiant tube temperature is set to 950 DEG C in the quick reduction apparatus of Iron Ore Powder;
4th, it is rich in CO by what is obtained in reduction tail gas after dedusting, pressurization, decarburization2Reduction tail gas and unreacted also Primordial Qi, Rich in CO2Reduction tail gas feeding reduction tail gas storage tank, unreacted reducing gas feeding reduction gas storage tank in brand-new also Primordial Qi Mixed, obtain mixing also Primordial Qi;
5th, CO volume fractions are 80%, H in the mixing also Primordial Qi2Volume fraction is 15%;
6th, the mixing also Primordial Qi is passed through from the quick reduction apparatus bottom of Iron Ore Powder, reverse heat exchange is realized with reduzate;
7th, the also Primordial Qi is heated up in uphill process by the effect that heat accumulation type radiant tube is heated, the Iron Ore Powder with whereabouts Exchanged heat and occur reduction reaction, reduction offgas outlet discharge of the reduction tail gas through the quick reduction apparatus top of Iron Ore Powder is reacted Device;
8th, the metallization powder of reaction generation is discharged through the quick reduction apparatus bottom of Iron Ore Powder;
9th, the degree of metalization of the metallization powder iron is 95%.
Embodiment two
The quick restoring method of the present embodiment Iron Ore Powder, comprises the following steps:
1st, iron ore concentrate is added at the top of the quick reduction apparatus of Iron Ore Powder;
2nd, the iron ore concentrate Iron grade is 65%, and the ratio that mineral powder granular particle diameter is less than 1mm is no less than 80%;
3rd, in the quick reduction apparatus of Iron Ore Powder, radiant tube is set to 900 DEG C, bottom 2/3rds in the altitude range of top 1/3rd Radiant tube temperature is set to 950 DEG C in altitude range;
4th, it is rich in CO by what is obtained in reduction tail gas after dedusting, pressurization, decarburization2Reduction tail gas and unreacted also Primordial Qi, Rich in CO2Reduction tail gas feeding reduction tail gas storage tank, unreacted reducing gas feeding reduction gas storage tank in brand-new also Primordial Qi Mixed, obtain mixing also Primordial Qi;
5th, CO volume fractions are 60%, H in the mixing also Primordial Qi2Volume fraction is 30%;
6th, the mixing also Primordial Qi is passed through from the quick reduction apparatus bottom of Iron Ore Powder, reverse heat exchange is realized with reduzate;
7th, the effect that the also Primordial Qi is heated in uphill process by heat accumulation type radiant tube heats up, and is carried out with the Iron Ore Powder of whereabouts Heat exchange and generation reduction reaction, reduction offgas outlet discharge reaction dress of the reduction tail gas through the quick reduction apparatus top of Iron Ore Powder Put;
8th, the metallization powder of reaction generation is discharged through the quick reduction apparatus bottom of Iron Ore Powder;
9th, the metallization powder degree of metalization is 95%.
The present invention is described in detail above, used herein principle and embodiment of the embodiment to the application It is set forth, the explanation of above example is only intended to help and understands the present processes and its core concept;Simultaneously for Those of ordinary skill in the art, according to the thought of the application, have change in specific embodiments and applications Place, in summary, this specification content should not be construed as the limitation to the application.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changed, replacing and modification.

Claims (10)

1. a kind of quick reduction reactor, it is characterised in that including:The feed zone that sets gradually from top to bottom, reduction section and cold But heating system is provided with section, the reduction section, miberal powder and reducing gas in reactor is carried out reduction reaction for producing Heat;
The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, wherein, the air-cooled sections bottom Provided with air distribution plate, preliminary cooling treatment is carried out to hot reduzate for introducing reducing gas;The surrounding in the water cooling region Provided with water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth.
2. a kind of quick reduction reaction system of water-cooled miberal powder, it is characterised in that including:Quick reduction reactor, heating system With also Primordial Qi system, wherein,
The quick reduction reactor includes feed zone, reduction section and the cooling section set gradually from top to bottom, the reduction section In be provided with the heating system, for producing the heat for making miberal powder and reducing gas in reactor carry out reduction reaction;
The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, wherein, the air-cooled sections bottom Provided with air distribution plate, preliminary cooling treatment is carried out to hot reduzate for introducing reducing gas;The surrounding in the water cooling region Provided with water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth;
It is described also Primordial Qi system, including exhaust gas processing device and reduction gas storage tank, wherein, the exhaust gas processing device respectively with instead Reduction offgas outlet and the reduction gas storage tank connection of device are answered, the reduction tail gas for being discharged to reactor is handled, obtained To unreacted reducing gas;
The reduction gas storage tank is connected through also Primordial Qi air intake valve with air distribution plate;
The also Primordial Qi system also includes brand-new also Primordial Qi source of the gas, and the reduction gas storage tank is new provided with brand-new also Primordial Qi entrance connection System also Primordial Qi source of the gas.
3. a kind of quick reduction reaction system of water-cooled miberal powder as claimed in claim 2, it is characterised in that the heating system Including multiple heat accumulation type radiant tubes, each heat accumulation type radiant tube is vertically disposed side by side in the reduction section;It is described to go back The side wall of former section is provided with fuel gas inlet, air intake and the exhanst gas outlet being connected with the heat accumulation type radiant tube.
4. a kind of quick reduction reaction system of water-cooled miberal powder as claimed in claim 2, it is characterised in that the also Primordial Qi system System also includes blower fan, and the air inlet of the blower fan is connected with the also Primordial Qi air intake valve, and gas outlet is connected with the air distribution plate, Air-cooled region for mixing reducing gas to be passed through to the quick reduction reactor.
5. a kind of quick reduction reaction system of water-cooled miberal powder as claimed in claim 2, it is characterised in that the also Primordial Qi system System also includes nitrogen air intake valve and nitrogen storage tank, and described nitrogen air intake valve one end is connected with the nitrogen storage tank, the other end It is connected with the air inlet of the blower fan, carries out air displacement for controlling nitrogen to enter reactor, it is ensured that enter in reducing gas Whole system is in nonoxidizing atmosphere before reactor.
6. a kind of quick reduction reaction system of water-cooled miberal powder as claimed in claim 2, it is characterised in that the vent gas treatment Device includes wash cooling device, compression set and decarbonization device, wherein, the wash cooling device connects with reduction offgas outlet Connect, the reduction tail gas for being discharged to reactor is washed, cooling treatment;The compression set and the wash cooling device Connection, for processing will to be compressed to the gas that wash cooling device is discharged;The decarbonization device is filled with the compression respectively Put and connected with the reduction gas storage tank, for the gas after compression to be carried out into carbonization treatment, obtained unreacted reducing gas It is passed into the reduction gas storage tank and is mixed with new reducing gas;The also Primordial Qi system also includes reduction tail gas storage tank, with The decarbonization device connection, CO is rich in for obtain decarbonization device2Reduction tail gas stored.
7. a kind of quick reduction reaction system of water-cooled miberal powder as claimed in claim 2, it is characterised in that also including it is described enter Discharge system, including miberal powder feed system and reduzate discharge system, wherein, the miberal powder feed system include raw material cabin, Bucket carry, upper push-pull valve, underthrust plate valve, material leakage cone and Vibrating Distribution Screen, wherein, it is described bucket carry respectively with raw material cabin and reactor phase Even, for from raw material cabin to reactor feeding;The upper push-pull valve, underthrust plate valve, material leakage cone and Vibrating Distribution Screen are from top to bottom It is set in turn in the feed zone, is opened and closed by the alternating of the upper push-pull valve and underthrust plate valve, in charging pair The reactor head charging aperture is closed in turn;The reduzate discharge system, including drawing mechanism and storage bin, institute State drawing mechanism to be connected with the discharging opening and the storage bin of the quick reduction reactor respectively, for will cool down in reactor Reduzate afterwards transports storage bin via drawing mechanism and stored.
8. the production method of the quick reduction reaction system of water-cooled miberal powder any one of a kind of utilization claim 2-7, its It is characterised by, comprises the following steps:
(1)Produce the preparation before starting:First, air-tight test is carried out to system, it is ensured that the sealing of whole system;So Afterwards, air displacement is carried out to reactor, opens nitrogen air intake valve, nitrogen carries out nitrogen purging through air distribution plate, it is ensured that whole system System is in nonoxidizing atmosphere;Finally, the temperature of reduction section is set, realized pair also by adjusting heat that heating system provides The accurate temperature controlling of former process;
(2)Reduction phase:After temperature of reactor reaches setting value and keeps stable, nitrogen air intake valve is closed, reduction is opened Gas air intake valve, makes reducing gas enter reactor reduction section, afterwards again by miberal powder via feed system, reactor feed Duan Tian It is added to reduction section;The reducing gas in gas storage tank is reduced via the air distribution plate in air-cooled region even into cooling section, is then risen Reduction reaction is carried out to reduction section and miberal powder, hot reduzate and reduction tail gas is obtained;
(3)Product processing:Cooling section is fallen under the hot reduzate, is carried out just via the reducing gas in air-cooled region successively Walk cooling treatment, the water-cooling wall in water cooling region carries out reducing temperature twice processing, the reduzate after being cooled down, via reactor Discharging opening enters discharge system;Meanwhile, the reducing gas in the air-cooled region carries out pre-add heat treatment in fact by hot reduzate Reduction section is risen to after existing energy exchange and carries out reduction reaction with miberal powder;The reduction tail gas rises to reduction offgas outlet discharge Reactor, is handled via exhaust gas processing device progress and obtains unreacted reducing gas, and it is led to one piece new of reducing gas Enter to reduce in gas storage tank and be passed through reactor participation reduction reaction via air distribution plate again after mixing, realize the circulation of reduction tail gas Recycle.
9. the production method of the quick reduction reaction system of miberal powder as claimed in claim 8, it is characterised in that step(2)In enter The fill process of material system includes:Miberal powder in raw material cabin is promoted to push-pull valve in reactor head, opening, miberal powder by bucket Via being dropped down onto under charging aperture on lower plugboard valve, then, push-pull valve in closing opens underthrust plate valve, makes between two push-pull valves Powder is bored via material leakage successively, reduction section is dropped down onto under Vibrating Distribution Screen, and material leakage cone avoids miberal powder from assembling, it is ensured that under miberal powder The smoothness fallen;Then, push-pull valve makes to be deposited in closing underthrust plate valve, opening drops down onto lower plugboard under the powder on push-pull valve On valve, charging is so repeated, is used cooperatively by the alternating of upper push-pull valve and underthrust plate valve, it is ensured that powder was falling Reactor head charging aperture is in sealing state from beginning to end in journey.
10. the production method of the quick reduction reaction system of miberal powder as claimed in claim 8, it is characterised in that step(2)In The burner hearth of reduction section is heated system and is heated to 900-1200 DEG C;Step(3)In hot reduzate it is warm behind air-cooled region Degree is down to 600-900 DEG C, and temperature is down to normal temperature behind water cooling region, meanwhile, the reducing gas in air-cooled region is preheated to 300-600 DEG C, realize reverse energy exchange.
CN201710614263.5A 2017-07-25 2017-07-25 Quick reduction reactor and the quick reduction reaction system and method for water-cooled miberal powder Pending CN107227387A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710614263.5A CN107227387A (en) 2017-07-25 2017-07-25 Quick reduction reactor and the quick reduction reaction system and method for water-cooled miberal powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710614263.5A CN107227387A (en) 2017-07-25 2017-07-25 Quick reduction reactor and the quick reduction reaction system and method for water-cooled miberal powder

Publications (1)

Publication Number Publication Date
CN107227387A true CN107227387A (en) 2017-10-03

Family

ID=59957214

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710614263.5A Pending CN107227387A (en) 2017-07-25 2017-07-25 Quick reduction reactor and the quick reduction reaction system and method for water-cooled miberal powder

Country Status (1)

Country Link
CN (1) CN107227387A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107955884A (en) * 2017-11-20 2018-04-24 赤峰富邦铜业有限责任公司 A kind of new oxygen-enriched side-blowing copper smelting-furnace furnace roof cooling device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107955884A (en) * 2017-11-20 2018-04-24 赤峰富邦铜业有限责任公司 A kind of new oxygen-enriched side-blowing copper smelting-furnace furnace roof cooling device
CN107955884B (en) * 2017-11-20 2019-08-13 赤峰富邦铜业有限责任公司 A kind of novel oxygen-enriched side-blowing copper smelting-furnace furnace roof cooling device

Similar Documents

Publication Publication Date Title
CN104673954B (en) Direct-reduction ironmaking method and system for iron-containing mineral powder
WO2018094886A1 (en) Direct reduction process of coal-based shaft furnace
CN108796217B (en) Device and method for recycling zinc-containing and iron-containing dust mud
CN104152165B (en) The metallurgical reducing process of coal gas circulation coal wholegrain radial sector pyrolysis coupling and system
EP2576845B1 (en) Process and plant for producing hot metal
CN107779536A (en) One kind direct-reduction iron production method and device
KR20150010997A (en) Method and device for introducing fine particle-shaped material into the fluidised bed of a fluidised bed reduction unit
KR100276344B1 (en) Smelting reduction process
CN107227392A (en) Miberal powder also original system
CN107227391A (en) A kind of miberal powder quickly goes back original system
CN207243923U (en) Quick reduction reactor and the quick reduction reaction system of water-cooled miberal powder
CN107227387A (en) Quick reduction reactor and the quick reduction reaction system and method for water-cooled miberal powder
CN207347593U (en) A kind of quick reduction reaction system of miberal powder
CN109680114A (en) A kind of system and method for coal gasification collaboration reduction of iron ore
CN107227386A (en) A kind of miberal powder that can carry hydrogen quickly reduces system and method
CN107190117A (en) A kind of quick reduction reaction system of miberal powder
US3585023A (en) Method and apparatus for reduction of iron ore
CN107475475A (en) Handle the system and method containing Iron Ore Powder
CN207243925U (en) A kind of miberal powder that can carry hydrogen quickly goes back original system
CN206607286U (en) The system that V-Ti-magnetite is reduced directly magnetic separation
CN207031479U (en) Miberal powder direct reduction unit
CN107227384A (en) Miberal powder reduction reaction system
CN113278790A (en) Iron-containing material pretreatment and composite injection method and system
CN207031480U (en) Miberal powder also original system
CN207738771U (en) A kind of equipment of direct-reduction

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination