CN104990390A - Dry discharged carbide slag drying and ferrosilicon collection method and system - Google Patents
Dry discharged carbide slag drying and ferrosilicon collection method and system Download PDFInfo
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Abstract
The invention provides a dry discharged carbide slag drying and ferrosilicon collection method and system and belongs to the field of building materials. Carbide slag discharged from dry-process acetylene and having a water content of 3-12% is fully dispersed by a dispersion and feeding device and enters a lower portion throat tube of a drying tube; the carbide slag is led into a drying cavity of the drying tube by hot exhaust gas from a kiln tail preheater; the carbide slag is subject to full heat exchange and water evaporation in the drying tube, and ferrosilicon in the carbide slag is separated because of the action of gravity. The system comprises a storage and conveying system, a drying system, a dry powder collection and storage system, a ferrosilicon collection and storage system, a waste gas treatment system and a heat supply system which are connected in turns. One side of the drying tube is communicated with the primary preheater at the kiln tail and the other side is communicated with the dry powder collection system. After drying the water content of the carbide slag is less than 1%; the content of the carbide slag in the ferrosilicon obtained after separation is less than 1%. The method and system provide reliable support for both carbide slag drying and ferrosilicon collection.
Description
Technical field
The invention belongs to building materials field, relate to dry discharging carbide slag slag large dosage, method for innocent treatment, particularly relate to the dry and ferrosilicon collection method of dry discharging carbide slag slag and system.
Background technology
Along with the develop rapidly of China's economy, the demand of market to polyvinyl chloride sharply increases, limit by china natural resources, generated by polyvinyl chloride by calcium carbide is the main flow that PVC produces, according to the difference of material quality, produce the carbide slag that 1 ton of polyvinyl chloride particles about discharges 1.6 tons, the continuous discharge of carbide slag, a large amount of valuable soil is needed to stack, the long-term stacking infiltration of carbide slag can cause saline Land, and by infiltration, groundwater resources are polluted, powdery flying dust also can cause very large pollution to surrounding environment, the harm life of resident and healthy, this present situation causes considerable hurdle to for a long time the sustainable development of environmental protection and chemical industry for making chlorine and alkali, utilize Cement production by Calcium Carbide Sludge, large dosage can be realized, innoxious use carbide slag, that carbide slag the most effectively processes approach, but the moisture containing 3-12% in the carbide slag that drying acetylene is discharged, the existence of moisture and fluctuation bring very large interference to the accuracy of manufacture of cement batching, and wet material grindability is poor, and the main frame output of raw material preparation system in manufacture of cement can be caused significantly to reduce, power consumption increases, and in calcination process, the evaporation of moisture needs to consume a large amount of heat energy, current water industry effectively utilizes kiln tail waste heat, effective measures energy-saving and cost-reducing beyond doubt, are dried in carbide mud residue ingredient front end
It is energy-saving and cost-reducing in carbide slag process, the stable selection process method used.
Ferrosilicon containing 1%-3% in carbide slag, ferrosilicon grindability is poor, can increase abrasive body and equipment wearing capacity in manufacture of cement, and causing raw material to prepare power consumption increases; Ferrosilicon particle also can cause raw mill partition panel to block, and causes very large harm to the stable operation of system.At present, the carbide slag ferrosilicon market price is at 2000-3500 yuan/ton, and in carbide slag, ferrosilicon content is at 1%-3%, if the ferrosilicon separation and collection in dry discharging carbide slag slag is got off, there is higher economic worth, ferrosilicon can be avoided to be used as low value-added cement raw material to use, cause the wasting of resources.The separation of tradition ferrosilicon adopts magnet to draw collecting method, the ferrosilicon particle that iron-holder is high is collected, the particle that particle is little and iron-holder is low cannot be out selected, the ferrosilicon particle be wrapped in the bed of material also cannot sort out, visible magnetic separation is separated the weak effect of ferrosilicon in carbide slag, how being sorted out by the ferrosilicon in dry discharging carbide slag slag, adopt and dry sorting ferrosilicon method of holding concurrently, high-efficiency pretreatment carbide slag is the important topic of carbide slag process field.
Chinese patent 201110441281.0 discloses a kind of carbide slag powdering process and system, adopt special purpose device rotary kiln hyperthermia drying carbide slag, then carry out grinding, solve the oven dry problem of moisture in carbide slag and remove the problem of part harmful components in carbide slag.But exist: 1. adopt carbide slag to stack, carry, enter the grinding of rotary kiln oven dry and dry carbide slag, dust collection and the several operation of storage, use equipment is many, complex process, need to take very large place, 2. adopt a large amount of power-equipments, the particularly use of the main equipment such as rotary kiln, ball mill, blower fan, need to consume a large amount of power consumptions, 3. adopt dedicated drying thermal source, bake out temperature is at 800-1200 DEG C, need to consume a large amount of fire coals, production cost is high, there is the environmental issues such as charcoal discharge.4. a large amount of certified products dust secondaries that kiln tail deduster is collected enter rotary kiln dries, second-pumping, circulate back and forth, cause waste and equipment attrition, technique is unreasonable, 5. the carbide slag more than 90% through drying is fine powder certified products, not adopt after sorting grinding process again, but directly enter grinding machine grinding, caused grinding phenomenon, not only waste a large amount of power consumption, also mill efficiency can be reduced, technique is unreasonable, 6. adopt tube mill steel ball as grinding device, carbide slag particle adhesiveness is very strong, abrasive body can be adhered in ball mill, cushion is formed between abrasive body and liner plate, thus reduce mill efficiency and increase grinding pow consumption.
Chinese patent 201320812049.8 provides a kind of device of cement rotary kiln kiln exit gas carbide slag drying, this technology discloses and utilizes kiln tail heat smoke by moisture dry discharging carbide slag slag drying technology in drying tube, solve the dry problem of carbide slag, but in the middle of practical application, there is following defect: 1. the warm-air pipe between kiln tail preheater and drying tube installs humidification sprayer unit additional, spray cooling in airduct, control EGT, belong to passive control methods, cause thermal waste, 2. drying tube structure is a straight tube, too simple, the space of heat exchange is inadequate, fully contacting of the moisture carbide slag of dry row and kiln tail heat smoke cannot be realized, during carbide slag moisture height, drying effect is not enough, cause dried material moisture not up to standard, 3. spray gun is arranged in pipeline, humidification spray atomization space is too little, tube wall can be caused too wet, phenomenon at the bottom of material sticks tube wall and material sticks pipe of the wet end, 4. adopt tilting plate lock air-valve bottom humidification pipe, along with material whereabouts service intermittent, do not design the gathering-device of wet stock at the bottom of pipe, and tilting plate lock air-valve can by material continus convergence to drying tube bottom spiral conveyer, wet stock can only enter silicon iron storehouse by bucket elevator, cannot with drying tube bottom feed separation out, enter drying tube and carry out redrying, technological design is unreasonable.5. drying tube material inlet only have employed revolution device for discharging, enters drying tube carbide slag and becomes stock to enter, cannot dispersed material, and the contact area of heat smoke and material is little, and drying effect is poor, causes out the material moisture of drying tube to exceed standard; And part granulated carbide slag and graininess ferrosilicon can directly fall into bottom drying tube, cause containing a large amount of carbide slag in ferrosilicon, subsequent technique needs secondary separation process, not only complex process, and can cause secondary pollution.6. because drying tube is straight tube-like, need very high height just carbide slag can be dried, cause construction investment high, installation difficulty is large, later maintenance expense.7. drying tube straight tube and trunnion horn mouth connect, and belong to and change diameter connection gradually, air-flow and the carbide slag motion state in drying tube is laminar motion, heat exchange and ferrosilicon inferior separating effect.
The people such as Shao Mingkai are in the separation method of ferrosilicon " in the dry discharging carbide slag slag of cement plant " literary composition, describe comparatively reasonably dry discharging carbide slag slag drying tube structure, but in use exist: 1. dry discharging carbide slag slag adopts the technique entering dry acetylene sludge powder storehouse outside three-way pipe, carbide slag needs outer row's Secondary Transport to add system, dust from flying can be caused, pollute site environment, and carbide slag mobility is very good, addition is difficult to control, great difficulty is brought to operation, 2. carbide slag only have employed air valve before entering drying tube, there is no dispersed feeding device, after carbide slag adds drying tube, because decentralization is inadequate, part granulated carbide slag and graininess ferrosilicon can directly fall into bottom drying tube, cause in the ferrosilicon of collection containing a large amount of carbide slag, carbide slag moisture is high, than time great, this situation is more serious, 3. the structure of drying tube is primarily of trunnion and straight tube composition, a large amount of granule ferrosilicon is carried away by the wind, ferrosilicon inferior separating effect, due to the characteristic of the difficult tribulation calcining of ferrosilicon, adverse effect is caused to subsequent production, especially the increasing of the reduction of raw material main frame output and the wearing and tearing of equipment can be caused.4. because drying tube is straight tube-like, need very high height just carbide slag can be dried, cause construction investment high, installation difficulty is large, later maintenance costly, 5. go out angle bottom preheater hot flue gas airduct and drying tube too little, SR is caused to increase, need the power consumption wasting very Iarge-scale system blower fan, 6. bottom drying tube there is angle to tremie pipe in aggregate bin, causes in ferrosilicon dropping process and strengthen the wearing and tearing of hopper, is unfavorable for that long-term safety is run, system cold draining wind can be caused after wearing and tearing, destroy system thermal technology balance.7. drying tube straight tube and trunnion horn mouth connect, and belong to and change diameter connection gradually, air-flow and the carbide slag motion state in drying tube is laminar motion, heat exchange and ferrosilicon inferior separating effect.
Chinese patent 200810092920.5 discloses a kind of large dosage and utilizes dry carbide slag technology for preparing cement, wherein carbide slag is dry by drying tube, produce the qualified material that moisture is less than 1%, solve the dry problem of carbide slag, but there is following defect: 1. dry discharging carbide slag slag and the material that unloads grinding machine in going out to dry enter drying tube drying after proper proportion collocation, cause out the secondary drying that the dry raw material of grinding machine are unnecessary, drying system load strengthens, have to strengthen postorder conveying equipment type selecting and the size increasing drying tube, in daily production, equipment attrition increases, power consumption increases.2. in drying system, do not consider that ferrosilicon is separated and gathering system, a large amount of ferrosilicon is there is in carbide slag, cause waste, and ferrosilicon is difficult to grinding, be difficult to calcining, can impact to system process, 3 do not arrange dry acetylene sludge powder storage vault, in order to the oven dry and raw meal proportioning that realize carbide slag are carried out simultaneously, cause kiln to grind must run simultaneously, just can realize the oven dry of carbide slag, the system cloud gray model of whole line of production technology is made to require to improve, and in the design process of cement plant, in order to ensure normal production and the raw material homogenizing of kiln, the advantage that the output of raw mill is greater than rotary kiln output cannot embody, make grinding machine cannot realize high yield to run, make unit raw material prepare power consumption to increase.4. because drying tube is straight tube-like, need very high height just carbide slag can be dried, cause construction investment high, installation difficulty is large, later maintenance expense.
Summary of the invention
The object of this invention is to provide the dry and ferrosilicon collection method of a kind of dry discharging carbide slag slag and system, in effective solution prior art, after carbide slag enters drying tube, dispersion effect is poor, can not fully and heat smoke carry out heat exchange, drying effect is bad, and part carbide slag is directly fallen into bottom drying tube together with ferrosilicon, containing a large amount of carbide slag in the ferrosilicon sorted out, drying tube structure causes device height high, and plant investment is large.
For achieving the above object, dry and the ferrosilicon collection method of a kind of dry discharging carbide slag slag and system are provided, concrete scheme is the moisture carbide slag that drying acetylene is discharged, after the dispersion of dispersed feeding device, the trunnion of drying tube bottom is entered by feed pipe, by heat smoke, carbide slag is brought into the drying chamber of drying tube, heat exchange is carried out with heat smoke, moisture evaporates, ferrosilicon in carbide slag is separated due to Action of Gravity Field, it is characterized in that drying tube comprises import airduct, aggregate bin, trunnion, compartment, drying chamber, outlet airduct, order connects composition; Carbide slag is the motion in turbulent condition in drying chamber, and ferrosilicon falls into compartment by drying chamber, enters aggregate bin.
Dry discharging carbide slag slag drying as above and ferrosilicon gathering system, this system comprises storage and induction system, drying system, and dry powder is collected and stocking system, ferrosilicon collection, conveying and stocking system, and exhaust-gas treatment and heating system sequentially connect composition.
Dry discharging carbide slag slag drying as above and ferrosilicon gathering system,
trunnion outer setting compartment, extends upwardly to bottom drying chamber, extends downward aggregate bin, makes ferrosilicon fall to aggregate bin from compartment.
Dry and the ferrosilicon gathering system of dry discharging carbide slag slag as above and method, the moisture carbide slag being divided into the drying acetylene of 3-12% to discharge, lock wind blanking device a is transported to through storage device, then by dispersed feeding device, carbide slag is fully disperseed, is entered the trunnion of drying tube bottom by feed pipe, by the high speed heat smoke exported from kiln tail one-level preheater, carbide slag is brought into the drying chamber of drying tube, carbide slag does in drying chamber
turbulent flowmotion, and heat smoke and heat smoke carry out sufficient heat exchange, moisture evaporates, and carbide slag is reverse-flow oven dry with the heat smoke from kiln tail preheater in the drying chamber of drying tube; Ferrosilicon in carbide slag is separated due to Action of Gravity Field, and bulky grain is separated at trunnion position, and granule is secondary separation in drying chamber, and the ferrosilicon particle after secondary separation enters compartment; Carbide slag enters cyclone separator with heat smoke, and enter dry powder storage device after material gas is separated, air-flow enters deduster, carries out dust collection further; Ferrosilicon is delivered to ferrosilicon storehouse by aggregate bin by conveying device and is collected; Drying tube by aggregate bin, bottom trunnion,
segmentation chamber,drying chamber and import and export airduct connect composition; Drying tube is thin, the middle thick tubular structure in two, connects between thickness pipe according to certain angle and direction; Namely carbide slag achieves the dry run of moisture evaporation in drying tube, achieves again ferrosilicon separation process, makes carbide slag be turbulent motion in drying chamber, extends the time of staying of carbide slag in drying chamber, improve the separating effect of ferrosilicon and air-flow.
Dry discharging carbide slag slag drying as above and ferrosilicon collection method, the drying tube bottom trunnion of carbide slag drying system is connected with dispersed feeding device, and dispersion blanking device front end is connected with lock wind blanking device a,
drying chamberbe connected with aggregate bin; The drying chamber diameter 1.5m-6m of drying tube, height is at 8-30m, it is the heat exchange zone of carbide slag and heat smoke, bottom throat pipe diameter is 1-5.5m, trunnion utilizes and reduces the way that sectional area improves wind speed, brings the carbide slag that dispersed feeding device is broken up into drying chamber rapidly, makes carbide slag and the heat smoke sufficient heat exchange exported from kiln tail one-level preheater, drying chamber can increase heat-exchange time, and carbide slag is done wherein
turbulent motion; After carbide slag enters trunnion, graininess ferrosilicon, owing to having certain weight, can fall into drying tube bottom aggregate bin and be sorted out,
adopt sectional area sudden enlargement to be connected between trunnion with drying chamber, make air-flow form eddy current in drying chamber bottom,buoyancy reduce, granule ferrosilicon by secondary sorting out,
enter compartment, avoid the ferrosilicon of whereabouts and ascending air mutually to disturb, cause air turbulence.carbide slag content <1% in ferrosilicon is discharged in ferrosilicon storehouse; Dried fine-powdered carbide slag enters cyclone separator along with air-flow, and expect that gas is separated, the gas going out cyclone separator enters deduster and collects dust further.
Dry discharging carbide slag slag drying as above and ferrosilicon collection method, the drying tube of drying system is at right angle setting, and one end is connected with the kiln tail preheater primary outlet warm-air pipe of heating system, and the other end is connected with the cyclone separator of dry acetylene sludge powder gathering system; Baking temperature and drying tube input gas temperature are 350 DEG C-650 DEG C, and after drying carbide slag, namely outlet temperature goes out drying tube EGT 180-250 DEG C.
Dry discharging carbide slag slag drying as above and ferrosilicon gathering system, in drying system, lock wind blanking device a is connected with dispersed feeding device, and dispersed feeding device is connected with the trunnion position of drying tube; Dispersed feeding device fully can disperse containing ferrosilicon, carbide slag containing moisture, fully contact with the heat smoke from kiln tail preheater after making material enter drying tube, carry out heat exchange, adverse current highly effective drying is carried out to material, the dry carbide slag moisture <1% after oven dry.
Dry discharging carbide slag slag drying as above and ferrosilicon gathering system, carbide slag stores and in induction system, storage device is connected with conveying device, and conveying device and drying system lock wind blanking device a are connected.
Dry discharging carbide slag slag drying as above and ferrosilicon collection method, dry acetylene sludge powder collect and stocking system in, cyclone inlet is connected with drying tube outlet airduct, Cyclone outlet is connected with deduster import in exhaust treatment system, bottom is connected with dry acetylene sludge powder storehouse, and lock wind blanking device c is equipped with in centre; Flue gas containing dry carbide slag does swirling motion in cyclone separator cyclone cylinder, and power is cut down rear material gas and is separated, and material falls, and entered in dry acetylene sludge powder storehouse by blanking device b, the dust content in stack gas going out cyclone separator is 50-100g/m
3, enter the further purified treatment of exhaust treatment system.
Dry discharging carbide slag slag drying system as above and ferrosilicon gathering system, in ferrosilicon collection, conveying and stocking system, aggregate bin bottom drying tube is communicated with tremie pipe with between conveying device b, tremie pipe is provided with lock wind blanking device b, the conveying device other end is connected with elevator a, elevator a is connected with ferrosilicon storehouse, and ferrosilicon is equipped with device for discharging at the bottom of storehouse.
Conveying device a as above is generally belt conveyor, and conveying device b is generally conveying worm, and conveying device c is generally chain transport machine.
Device for discharging as above is generally electric arc-shape-valve.
Dry discharging carbide slag slag drying as above and ferrosilicon collection method, exhaust treatment system is connected formed by deduster, air-introduced machine, goes out the dust-laden exhaust gas of cyclone separator, and filter through deduster, dust concentration is less than 30mg/ m
3, gas enters air through air-introduced machine, and the dust collected delivers to lifting device b by conveying device b, enters kiln ash storehouse.
Dry discharging carbide slag slag drying as above and ferrosilicon collection method, heating system is connected to form by kiln tail one-level preheater and warm-air pipe, and utilize kiln tail to go out the heat smoke waste heat of one-level preheater as drying source, waste heat supply temperature is 350 DEG C-650 DEG C.
The invention has the beneficial effects as follows: the dry and ferrosilicon collection method of a kind of dry discharging carbide slag slag and system are provided, directly fall into bottom drying tube to prevent carbide slag, utilize dispersed feeding device will containing moisture, drying tube is added after carbide slag containing ferrosilicon fully disperses, drying tube bottom feed location is provided with trunnion, wind speed can be improved, dispersion carbide slag, bring carbide slag into drying tube, drying chamber sectional area is adopted to expand, wind speed reduces, extend the time of staying of material in drying tube, thus extend the time of contact of material and heat smoke, carry out sufficient heat exchange, carbide slag contained humidity is fully evaporated, dried carbide slag moisture <1%, meanwhile, sectional area sudden enlargement between trunnion and drying chamber, air-flow forms eddy current bottom drying chamber, heat smoke buoyancy reduces, graininess ferrosilicon falls into compartment due to deadweight along the sidewall of drying chamber, enters aggregate bin, the content <1% of carbide slag in the ferrosilicon after collection, the air-flow with carbide slag of the ferrosilicon that secondary separation in drying tube is fallen by compartment and rising is kept apart, and avoids mutual interference, causes air turbulence.Native system is by having the heat smoke heating of certain wind speed, the moisture carbide slag of the dry row of sorting, namely dry carbide slag, achieve again ferrosilicon to be separated, and extend the time of staying of material in drying tube by drying chamber, greatly increase drying effect and ferrosilicon separating effect, realize effectively reducing drying tube height, save the effect of construction investment and production maintenance expense, native system uses power-equipment few, effectively make use of kiln tail to give up fume afterheat, energy consumption is low, be easy to operation control, the oven dry that can realize a large amount of carbide slag is separated with ferrosilicon, realize energy-saving and cost-reducing and waste residue resource utilization, ensure chemical industry for making chlorine and alkali sustainable development, there is good promotional value.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention:
Fig. 2 is drying tube signal intention:
Fig. 3,4 is the drying tube local interior structural representation of embodiment.
Drawing reference numeral: 1 carbide slag storehouse, 2 belt conveyor a, 3 drying tubes, 4 dispersed feeding devices, 5 rotary feeder a, 6 warm-air pipes, 7 one-level preheaters, 8 drying chambers, 9 trunnions, 10 aggregate bins, 11 tilting plate lock air-valves, 12 conveying worms, 13 elevator a, 14 electric arc-shape-valves, 15 ferrosilicon storehouses, 16 kiln ash storehouses, 17 elevator b, 18 chain transport machines, 19 dedusters, 20 air-introduced machines, 21 dry acetylene sludge powder storehouses, 22 rotary feeder b, 23 cyclone separators, 24 import airducts, 25 outlet airducts, 26 compartments, 27 feed pipes, 28 deflectors.
Detailed description of the invention
The detailed description of the invention provided below in conjunction with accompanying drawing is described in further details the present invention, but does not form any limitation of the invention.
Embodiment 1:
With reference to accompanying drawing 1, 2, 3, the technical solution used in the present invention is: moisture is that the dry discharging carbide slag slag of 10% is from 1 carbide slag storehouse blanking to belt feeder a2, carbide slag is transported to drying system, through rotary feeder 5, enter dispersed feeding device 4, after material is dispersed throughout, the trunnion 9 of drying tube 3 is entered by feed pipe 27, the heat smoke of kiln tail one-level preheater 7, wind is drawn through air-introduced machine 20, heat smoke is by warm-air pipe 6, through the import airduct 24 of drying tube 3, after wind speed is improved at trunnion 9 position, carbide slag is brought into the middle enlarged drying chamber 8 of drying tube 3, flue gas containing carbide slag is suspended state, caliber sudden enlargement structure is adopted between trunnion 9 and drying chamber 8, carbide slag is made to do turbulent motion at drying chamber 8, bottom is turbulent state, carbide slag and heat smoke fully contact and carry out heat exchange, along with air motion, dried carbide slag enters dry powder with air-flow and collects and stocking system, carbide slag containing ferrosilicon is after dispersed feeding device 4 fully dispersion, after entering the trunnion 9 of drying tube 3, oarse-grained ferrosilicon falls to the bottom aggregate bin 10 of drying tube 3 owing to conducting oneself with dignity, short grained ferrosilicon enters drying chamber 8 with high speed heat smoke, cross section expands rapidly, buoyancy reduces, eddy current bottom drying chamber 8, ferrosilicon by secondary separation out, fall to compartment 26, compartment 26 isolates ferrosilicon and ascending air, the ferrosilicon of ascending air and whereabouts is avoided mutually to disturb, the ferrosilicon of secondary separation drops down onto aggregate bin 10 by compartment 26, ferrosilicon is by tilting plate lock air-valve 11, enter conveying worm 12, be transported to elevator a13, be lifted into ferrosilicon storehouse 15, ferrosilicon storehouse 15 lower curtate is equipped with electric arc-shape-valve 14, ferrosilicon can be drawn off, dried carbide slag enters cyclone separator 23 with air-flow, after carbide slag is separated with waste gas, carbide slag is through rotary feeder 22, even blanking is to dry acetylene sludge powder storehouse 21, go out in the waste gas of cyclone separator 23 containing certain density dust, after dust collected by deduster 19, waste gas enters air by exhaust blower 20 by chimney, dust after deduster 19 collection, by chain transport machine 18, is transported to elevator b17, is promoted to kiln ash storehouse 16, and dry acetylene sludge powder and kiln ash are arranged in pairs or groups in proportion and entered lower road use operation.
Wherein as Fig. 1,2, the structure of drying tube is: from the heat smoke of kiln tail one-level preheater 7, through warm-air pipe 6, drying chamber 8 is entered by drying tube import airduct 24, carbide slag drying be separated ferrosilicon after, enter dust collecting system through outlet airduct 25, aggregate bin 10 collects all ferrosilicon of whereabouts.
In said process, carbide slag average moisture is 10%, adopt three grades of pre-heating systems, the flue-gas temperature entering drying tube is 550-600 DEG C, drying tube 3 inventory 100t/h, trunnion 9 diameter of drying tube 3 is 1.2m, 8 drying chamber diameter 2.0m, be highly 28m, after dry, water of the carbide slag is divided into 0.2%, and in carbide slag, ferrosilicon content is 1.5%, and in the ferrosilicon after collection, the content of carbide slag is 0.8%.
Rotary feeder a as above, tilting plate lock air-valve, rotary feeder b are the one of lock wind blanking device.
Embodiment 2
With reference to accompanying drawing 1,2,3, the difference of embodiment 2 and embodiment 1 is, thermal source is the flue gas of level Four preheater outlet, temperature is at 400 DEG C-450 DEG C, and trunnion 9 diameter of drying tube 3 is 2.8m, and 8 drying chamber diameters are 4m, be highly 20m, before dry, the moisture of carbide slag is 6%, and after dry, the moisture of carbide slag is 0.5%, and the ferrosilicon of collection is the content of middle carbide slag is 0.6%.
Embodiment 3
With reference to accompanying drawing 1,2,4, embodiment 3 is with the difference of embodiment 1 and 2, and in drying chamber 8, arrange deflector 28, the ferrosilicon after secondary separation is fallen along deflector 28, more orderly falls to 10 aggregate bins.Adopt the outlet heat smoke of Pyatyi preheater as thermal source, the heat smoke temperature entering drying tube 3 is 350 DEG C--400 DEG C, the diameter of drying chamber 8 is 5.8m, be highly 12m, the diameter of trunnion 9 is 4.8m, the water of the carbide slag entering drying tube 3 is divided into 4%, and after dry, the moisture of carbide slag is 0.3%, containing carbide slag 0.3% in the ferrosilicon after collection.
Claims (8)
1. the drying of dry discharging carbide slag slag and ferrosilicon collection method, the method comprises: the moisture carbide slag that drying acetylene is discharged, after the dispersion of dispersed feeding device, entered the trunnion of drying tube bottom by feed pipe, by heat smoke, carbide slag is brought into the drying chamber of drying tube, and heat smoke carries out heat exchange, moisture evaporates, ferrosilicon in carbide slag is separated due to Action of Gravity Field, it is characterized in that carbide slag motion in turbulent condition in drying chamber
ferrosilicon falls into compartment by drying chamber, enters aggregate bin.
2. one kind realizes the system of dry discharging carbide slag slag according to claim 1 drying and ferrosilicon collection method, it is characterized in that this system comprises storage and induction system, drying system, dry powder is collected and stocking system, ferrosilicon collection, conveying and stocking system, exhaust-gas treatment and heating system order connect composition, and the drying tube of drying system comprises import airduct, aggregate bin, trunnion, compartment, drying chamber, outlet airduct, and order connects composition.
3. dry discharging carbide slag slag drying according to claim 2 and ferrosilicon gathering system, is characterized in that trunnion outer setting compartment, extend upwardly to bottom drying chamber, extend downward aggregate bin.
4. and ferrosilicon gathering system dry according to the arbitrary described dry discharging carbide slag slag of Claims 2 or 3, it is characterized in that the drying tube one end in drying system is connected with the kiln tail preheater primary outlet warm-air pipe of heating system, the other end is connected with the cyclone separator of dry acetylene sludge powder gathering system.
5. dry discharging carbide slag slag drying according to claim 1 and ferrosilicon collection method, it is characterized in that the heat smoke of carbide slag in the drying chamber of drying tube and from kiln tail preheater is reverse-flow oven dry, ferrosilicon in carbide slag is due to Action of Gravity Field, bulky grain is separated at trunnion position, granule is secondary separation in drying chamber, and the ferrosilicon particle after secondary separation enters compartment.
6. and ferrosilicon gathering system dry according to the arbitrary described dry discharging carbide slag slag of Claims 2 or 3, it is characterized in that in ferrosilicon collection, conveying and stocking system, aggregate bin bottom drying tube is communicated with tremie pipe with between conveying device b, tremie pipe is provided with lock wind blanking device b, the conveying device other end is connected with elevator a, elevator a is connected with ferrosilicon storehouse, and ferrosilicon is equipped with device for discharging at the bottom of storehouse.
7. dry discharging carbide slag slag drying according to claim 1 and ferrosilicon collection method, is characterized in that:
(1) drying chamber diameter is 1.5-6m, is highly 8-30m, and throat pipe diameter is 1-5.5m;
(2) baking temperature is 350-650 DEG C, goes out drying tube EGT at 180-250 DEG C;
(3) dust content in stack gas going out cyclone separator is 50-100g/m
3.
8. dry discharging carbide slag slag drying according to claim 1 and ferrosilicon collection method, is characterized in that:
(1) the dry carbide slag moisture <1% after being dried by drying tube;
(2), after being separated by drying tube, the content <1% of carbide slag in ferrosilicon is discharged in ferrosilicon storehouse.
Priority Applications (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111517678A (en) * | 2020-03-25 | 2020-08-11 | 安徽华塑股份有限公司 | Device and process for drying and selecting carbide slag by using high-temperature gas at tail of cement kiln |
| CN114950956A (en) * | 2022-04-29 | 2022-08-30 | 林景辉 | System and method for separating silicon iron and calcium carbide from carbide slag |
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| CN111517678A (en) * | 2020-03-25 | 2020-08-11 | 安徽华塑股份有限公司 | Device and process for drying and selecting carbide slag by using high-temperature gas at tail of cement kiln |
| CN114950956A (en) * | 2022-04-29 | 2022-08-30 | 林景辉 | System and method for separating silicon iron and calcium carbide from carbide slag |
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Address after: 832000 the Xinjiang Uygur Autonomous Region Shihezi City Industrial Park, fifteen North Road No. 12 Applicant after: TIANNENG CEMENT CO., LTD. Applicant after: Tianchen Cement Co., Ltd. Applicant after: Tian Wei Cement Co., Ltd Applicant after: Xinjiang Corps Modern Green Chlor-Alkali Chemical Engineering Research Center (Co., Ltd.) Address before: 832000 the Xinjiang Uygur Autonomous Region Shihezi City Industrial Park, fifteen North Road No. 12 Applicant before: Tian Neng cement limited liability company Applicant before: Tianchen Cement Co., Ltd. Applicant before: Tian Wei Cement Co., Ltd Applicant before: Xinjiang Corps Modern Green Chlor-Alkali Chemical Engineering Research Center (Co., Ltd.) |
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Application publication date: 20151021 |
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