CN109181809A - A kind of denatured fuel and preparation method thereof based on reduction catalysts Ore Sintering Process emission reduction NOx - Google Patents
A kind of denatured fuel and preparation method thereof based on reduction catalysts Ore Sintering Process emission reduction NOx Download PDFInfo
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- 239000000446 fuel Substances 0.000 title claims abstract description 252
- 238000005245 sintering Methods 0.000 title claims abstract description 148
- 230000009467 reduction Effects 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 80
- 230000008569 process Effects 0.000 title claims abstract description 67
- 239000003054 catalyst Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 23
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 20
- 238000002485 combustion reaction Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000292 calcium oxide Substances 0.000 claims description 10
- 235000012255 calcium oxide Nutrition 0.000 claims description 10
- 239000000203 mixture Substances 0.000 abstract description 54
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 30
- 238000011946 reduction process Methods 0.000 abstract description 10
- 230000003197 catalytic effect Effects 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 238000006722 reduction reaction Methods 0.000 description 82
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 64
- 239000003546 flue gas Substances 0.000 description 53
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 47
- 229910052742 iron Inorganic materials 0.000 description 32
- 230000000052 comparative effect Effects 0.000 description 30
- 230000000694 effects Effects 0.000 description 23
- 238000002407 reforming Methods 0.000 description 22
- 238000005516 engineering process Methods 0.000 description 20
- 230000004907 flux Effects 0.000 description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 0.000 description 10
- 238000006555 catalytic reaction Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000002994 raw material Substances 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000002817 coal dust Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 5
- 238000005469 granulation Methods 0.000 description 5
- 230000003179 granulation Effects 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 238000005054 agglomeration Methods 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 238000004939 coking Methods 0.000 description 4
- 238000005453 pelletization Methods 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010574 gas phase reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012286 potassium permanganate Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000004449 solid propellant Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 235000019082 Osmanthus Nutrition 0.000 description 1
- 241000333181 Osmanthus Species 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/204—Alkaline earth metals
- B01D2255/2045—Calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20738—Iron
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of denatured fuels and preparation method thereof based on reduction catalysts Ore Sintering Process emission reduction NOx, are related to sintered pollutant technical field of emission reduction.The present invention includes sinter and fuel, the additional amount of sinter is the 0.5%~5% of fuel gross mass, by by after fine grinding sinter and fuel carry out it is dry-mixed, denatured fuel is prepared, the sinter fines and fuel that sinter in denatured fuel of the invention is formed after being crushed are sufficiently dry-mixed, loosely distribution is to be mixed into sinter mixture around fuel, the effective reduction for the NOx that burning can be promoted to generate, sinter fines can carry out efficient catalytic to the reduction process for the nitrogen oxides that fuel generates simultaneously, and then realize the efficient emission-reducing of Ore Sintering Process NOx.
Description
Technical field
The present invention relates to sintered pollutant technical field of emission reduction, are based on reduction catalysts iron ore more specifically to one kind
The denatured fuel and preparation method thereof of sintering process emission reduction NOx.
Background technique
NOx is one of current Air Pollutants, in an atmosphere NOx acid rain easy to form and photochemical fog, is influenced
It ecological environment and is detrimental to health, and steel industry NOx emission status is especially severe.According to statistics, steel industry NOx gas
Discharge amount accounts for 10% or so of industrial total release, and wherein sintering process is one of the main source for generating NOx, accounts for NOx row
Put 50% or so of total amount.Agglomeration for iron mine process energy consumption is mainly the consumption of the fossil fuels such as solid fuel coke powder, anthracite, about
The 75~80% of process total energy consumption are accounted for, and 90% or more the NOx of sintering process discharge is transformed by the nitrogen in fuel.
NOx emission new standard specified on January 1st, 2015 " steel sintering, pelletizing industrial air pollution object discharge standard " is existing
Enterprise comes into effect, and sintering process is faced with huge NOx abatement pressure.
The discharge-reducing method of sintering process NOx mainly carries out end treatment to sintering flue gas both at home and abroad at present, and method is main
(selectivity is non-to urge for active coke flue gases purification, SCR denitration technology (selective catalytic reduction) and SNCR denitration technology
Change reduction method).Wherein, Flue Gas Purification Technology Using Activated Coke NOx removal rate is higher, but its investment and operating cost are higher, certain burning
Knot factory carries out emission reduction by this way, and cost reaches 10 yuan/ton of sinters, and this processing mode makes steel production enterprise back heavy
Heavy burden；And for SCR denitration technology, SCR denitration Applicable temperature (320~450 DEG C) usually with sintering flue gas temperature (120~
180 DEG C) it mismatches, catalyst activity substance can be reduced by addition containing in sintering flue gas, therefore the technology NOx abatement rate extremely has
Limit；For SNCR denitration technology, one side SNCR denitration technology Applicable temperature (850-1100 DEG C) also with sintering flue gas temperature not
Matching carries out reheating to sintering flue gas and also increases emission reduction cost, so the appropriate of the technology is relatively low.Also there is burning
It ties related scholar and business research is sintered NOx process control the relevant technologies, process control investment and operating cost are low, are easy to real
It is existing, but denitration efficiency is relatively low.
Through retrieving, invention and created name are as follows: it is a kind of reduce agglomeration for iron mine NOx emission raw material preparation and sintering method (Shen
Please number: 201710422217.5, applying date: 2017.06.07), stock preparation process disclosed in this application are as follows: step 1 is pressed
Quality proportioning weighs Iron Ore Powder, fuel and flux；Iron Ore Powder is divided into Iron Ore Powder one and Iron Ore Powder two according to mass ratio；Step 2,
Iron Ore Powder one is subjected to pelletizing, prepares mother bulb one；Step 3, Iron Ore Powder two and flux are uniformly mixed with adherency powder；Step 4 is incited somebody to action
Adherency powder and mother bulb one carry out pelletizing in disc balling machine, prepare mother bulb two；Step 5 carries out coke powder and mother bulb two uniformly
Mixing, is reduced the raw material of agglomeration for iron mine NOx emission；This application utilizes calcium ferrite and Fe2O3Original work are gone back to the catalysis of NOx
With, thus realize agglomeration for iron mine NOx abatement, but the main source of NOx is the combustion process of fuel, this application in sintering process
The NOx that case does not pointedly discharge fuel is handled, and causes the emission reduction effect of NOx by biggish limitation.Invention
Create title are as follows: it is a kind of based on inhibit Ore Sintering Process fuel bound nitrogen conversion NOx control method (application number:
201610071111.0 the applying date: 2016.02.01)；This application discloses one kind based on inhibition Ore Sintering Process fuel
Nitrogen conversion NOx control method, first by sinter return fine be less than 1mm particle screening come out, then by the sinter return fine of -1mm,
After Fine Hematite Ore, quick lime, sintering fuel and hydrocarbon ingredient with cementation, carried out in trommel mixer
Prefabricated grain, gained mixture are pelletized with remaining iron-bearing material, flux, sinter return fine；Then by its cloth, igniting, sintering；
The calcium ferrite generated in this application has the effect of sintering process NOx to be catalyzed emission reduction, but it is one by way of granulation
Determine to be degrading NOx abatement environment in degree, limits its NOx abatement effect.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to provide for the lower problem of sintering process nitrogen oxides emission reduction efficiency in the prior art
A kind of denatured fuel and preparation method thereof based on reduction catalysts Ore Sintering Process emission reduction NOx；The present invention will be by that will be crushed
Sinter and fuel progress afterwards is dry-mixed, denatured fuel is prepared, the denatured fuel is mixed into sinter mixture can be effective
Reduce NOx discharge.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx of the invention, including sinter and combustion
Material, the additional amount of sinter is the 0.5%~5% of fuel gross mass.
Preferably, the additional amount of sinter is the 1%~2% of fuel gross mass.
Preferably, the granularity of used sinter is greater than 5mm.
Preferably, sinter needs to be broken into sinter fines, and the partial size of sinter fines is not more than 0.5mm.
Preferably, in fuel the mass content of H less than 0.5%.
Preferably, sinter is the combination of one or more in BF return fines, finished product sinter and hearth layer for sintering.
A kind of preparation method of denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx of the invention first will
Sinter is crushed, and sinter fines is obtained；Then under conditions of water is not added by sinter fines be added in fuel into
Row is dry-mixed, and denatured fuel is made.
Preferably, sinter fines is dried, then by dry sinter fines under conditions of water is not added
It is added in fuel and carries out dry-mixed, obtained denatured fuel.
Preferably, dry sinter fines is added in fuel during fuel crushing, fuel is broken
Dry-mixed, obtained denatured fuel is carried out with sinter fines in the process.
Preferably, sinter fines and quick lime are added into fuel under conditions of water is not added carry out it is dry-mixed, be made
Denatured fuel.
3. beneficial effect
Using technical solution provided by the invention, compared with existing well-known technique, there is following remarkable result:
(1) a kind of denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx of the invention, including sinter and
Fuel, the additional amount of sinter are the 0.5%~5% of fuel gross mass, by doing broken sinter and fuel
It is mixed, denatured fuel is prepared, the denatured fuel is mixed into sinter mixture can carry out effectively the NOx that fuel combustion generates
Catalysis reduction, to improve the emission reduction rate of NOx.
(2) a kind of denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx of the invention, the addition of sinter
Amount is the 0.5%~5% of fuel gross mass, and sinter it is broken after the sinter fines that is formed and fuel it is sufficiently dry-mixed, it is thin
Loose ground distribution is around fuel, avoids causing to hinder to the combustion process of fuel, so that the NOx's for promoting burning to generate is effective
Reduction, while sinter fines can carry out efficient catalytic to the reduction process for the nitrogen oxides that fuel generates.
(3) a kind of denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx of the invention, used sintering
The granularity of mine is greater than 5mm, is then crushed the sinter；To guarantee the iron containing sufficient amount in used sinter
Sour calcium, and then effectively improve the catalytic effect to NOx reduction process.
(4) a kind of denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx of the invention, sinter need broken
It is broken into sinter fines, the partial size of sinter fines is not more than 0.5mm, which is arranged the ratio table that can make sinter fines
Area increases, and then improves the touch opportunity of calcium ferrite and NOx in sinter fines, to improve the catalysis of NOx reduction process
Efficiency.
(5) preparation method of a kind of denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx of the invention, it is first
First by the broken obtained sinter fines of sinter, then sinter fines is added in fuel under conditions of water is not added and is carried out
It is dry-mixed, denatured fuel is made, the preparation method is sufficiently dry-mixed by carrying out sinter fines with fuel, to make it loosely
Distribution is around fuel；NOx can be generated in fuel combustion process, the sinter fines of loose distribution can be with efficient catalytic NOx
Reduction process, and then realize Ore Sintering Process NOx efficient emission-reducing.
Detailed description of the invention
Fig. 1 is a kind of preparation method of denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx of the invention
Flow chart.
Specific embodiment
Hereafter detailed description of the present invention and example embodiment are more fully understood in combination with attached drawing.
Embodiment 1
As shown in Figure 1, a kind of preparation method for the denatured fuel of emission reduction NOx in sintering process of the invention, step
Are as follows: sinter fines is dried, and then dry sinter fines is added in fuel under conditions of water is not added
Carry out dry-mixed, obtained denatured fuel；Specific steps are as follows:
(1) sinter is subjected to fine grinding, obtains sinter fines；Specific steps are as follows: selection granularity is greater than the sintering of 5mm
Sinter is added and is crushed into crusher by mine, sinter is carried out fine grinding after the completion of being crushed, so that the sintering after fine grinding
The granularity of mine is less than 0.5mm；
(2) sinter fines is added in fuel under conditions of water is not added and carries out dry-mixed, obtained denatured fuel；Specifically
Step are as follows: under the dry condition, first add fuel in batch mixer, then again by the addition of sinter fines in fuel,
Sinter fines and fuel progress is dry-mixed, the addition of water is avoided during mixing, wherein the quality of sinter fines
It is the 0.5% of fuel gross mass, the fuel of the present embodiment is coke powder；Herein, it should be noted that needed if batch mixer humidity
Batch mixer is dried；
Next, iron-bearing material, flux are mixed with denatured fuel, pelletize to obtain mixture；Wherein iron-bearing material
It may include Iron Ore Powder, return mine, blast furnace ash, the ion dust mud contaning of OG Ni Denggang industry factory etc., the specific raw material proportioning of the present embodiment is such as
Shown in table 1；Raw material in table 1 is added in batch mixer according to raw material proportioning and is mixed, water is added during mixing,
So that raw materials for sintering carries out mixing granulation and obtains sinter mixture.Mixture dress is laid on trolley again, mixture is carried out
It lights a fire, down draft sintering, and detects the NO of sintering flue gas in sintering flue gas main pipelineXContent, and record as shown in table 2.To burning
Knot index is detected and is recorded as shown in table 3.
1 proportions of sintering raw materials table of table
Embodiment 2
The basic content of the present embodiment with embodiment 1, the difference is that, select granularity greater than 8mm sinter carry out
Fine grinding, the sinter that the present embodiment uses are+8mm BF return fines.
Mixture dress is laid on trolley, is lighted a fire to mixture, down draft sintering, and examined in sintering flue gas main pipeline
Survey the NO of sintering flue gasXContent, and record as shown in table 2.
Embodiment 3
The basic content of the present embodiment with embodiment 1, the difference is that, select granularity greater than 15mm sinter carry out
Fine grinding, the sinter that the present embodiment uses are hearth layer for sintering.
Mixture dress is laid on trolley, is lighted a fire to mixture, down draft sintering, and examined in sintering flue gas main pipeline
Survey the NO of sintering flue gasXContent, and record as shown in table 2.
Embodiment 4
The basic content of the present embodiment with embodiment 1, the difference is that, select granularity greater than 20mm sinter carry out
Fine grinding sinter fine grinding, the sinter that the present embodiment uses are finished product sinter.
Mixture dress is laid on trolley, is lighted a fire to mixture, down draft sintering, and examined in sintering flue gas main pipeline
Survey the NO of sintering flue gasXContent, and record as shown in table 2.
Embodiment 5
The basic content of the present embodiment with embodiment 1, the difference is that, add fuel to crusher and carry out broken place
Dry sinter or sinter fines, are added in fuel by reason during fuel crushing, and fuel is in broken mistake
Dry-mixed, obtained denatured fuel is carried out in journey with sinter fines；The mixture dress of iron-bearing material, flux and denatured fuel is laid on
It on trolley, is lighted a fire to mixture, down draft sintering, and detects the NO of sintering flue gas in sintering flue gas main pipelineXContent, and
Record is as shown in table 2.
Embodiment 6
The basic content of the present embodiment with embodiment 1, the difference is that, the additional amount of sinter fines is the total matter of fuel
The 1% of amount.Then the mixture dress of iron-bearing material, flux and denatured fuel is laid on trolley, lighted a fire, taken out to mixture
Wind is sintered, and the NO of sintering flue gas is detected in sintering flue gas main pipelineXContent, and record as shown in table 2.Sintering sintering is referred to
Mark is detected and is recorded as shown in table 3.
Embodiment 7
The basic content of the present embodiment with embodiment 1, the difference is that, the additional amount of sinter fines is the total matter of fuel
The 3% of amount.Then the mixture dress of iron-bearing material, flux and denatured fuel is laid on trolley, lighted a fire, taken out to mixture
Wind is sintered, and the NO of sintering flue gas is detected in sintering flue gas main pipelineXContent, and record as shown in table 2.Sintering sintering is referred to
Mark is detected and is recorded as shown in table 3.
Embodiment 8
The basic content of the present embodiment with embodiment 1, the difference is that, the additional amount of sinter fines is the total matter of fuel
The 5% of amount.Then the mixture dress of iron-bearing material, flux and denatured fuel is laid on trolley, lighted a fire, taken out to mixture
Wind is sintered, and the NO of sintering flue gas is detected in sintering flue gas main pipelineXContent, and record as shown in table 2.Sintering sintering is referred to
Mark is detected and is recorded as shown in table 3.
Embodiment 9
The basic content of the present embodiment with embodiment 1, the difference is that, the partial size of sinter fines is not more than
0.25mm.The mixture dress of iron-bearing material, flux and denatured fuel is laid on trolley, is lighted a fire to mixture, exhausting is burnt
It ties, and detects the NO of sintering flue gas in sintering flue gas main pipelineXContent, and record as shown in table 2.
Embodiment 10
The basic content of the present embodiment with embodiment 1, the difference is that, the partial size of sinter fines is not more than
0.10mm.The mixture dress of iron-bearing material, flux and denatured fuel is laid on trolley, is lighted a fire to mixture, exhausting is burnt
It ties, and detects the NO of sintering flue gas in sintering flue gas main pipelineXContent, and record as shown in table 2.
Embodiment 11
The basic content of the present embodiment with embodiment 1, the difference is that, sinter is broken obtain sinter fines after,
First dry quick lime is added in sinter fines and carries out dry-mixed, obtained composite sinter fines；It is again that composite sinter is thin
Material, which is added in fuel, carries out dry-mixed, obtained denatured fuel；The mixture of iron-bearing material, flux and denatured fuel is then filled into paving
In on trolley, lighted a fire to mixture, down draft sintering, and in sintering flue gas main pipeline detect sintering flue gas NOXContent,
And it records as shown in table 2.
Comparative example 1
The basic content of the present embodiment with embodiment 1, the difference is that, processing is not modified to fuel, directly will
The mixture dress of iron-bearing material, flux and denatured fuel is laid on trolley, is lighted a fire to mixture, down draft sintering, and burning
Tie the NO that sintering flue gas is detected in flue gas main pipelineXContent, and record as shown in table 2.
Comparative example 2
The basic content of the present embodiment with embodiment 1, the difference is that, take the sinter equal with fuel mass, adopt
Denatured fuel is made with the mode routinely pelletized.The detailed process of the technology are as follows: first add water to be pre-mixed in sinter and fuel
Granulation, so that sinter and fuel carry out prefabricated grain, herein it should be noted that in order to improve prefabricated grain effect, the present embodiment
In be added to the binder of fuel mass 0.5%；It will be mixed again by the fuel after sinter prefabricated grain with other raw materials
Granulation.
The mixture dress of iron-bearing material, flux and denatured fuel is laid on trolley, is lighted a fire to mixture, exhausting is burnt
It ties, and detects the NO of sintering flue gas in sintering flue gas main pipelineXContent, and record as shown in table 2.To sintering sintering index into
Row is detected and is recorded as shown in table 3.
Comparative example 3
The basic content of the present embodiment with embodiment 1, the difference is that, take 1.5 times of fuel mass of sinter, use
Denatured fuel is made in the mode routinely pelletized.The detailed process of the technology are as follows: first add water to be pre-mixed system in sinter and fuel
Grain, so that sinter and fuel carry out prefabricated grain, herein it should be noted that in order to improve prefabricated grain effect, in the present embodiment
It is added to the binder of fuel mass 0.5%；It will carry out mixing system with other raw materials by the fuel after sinter prefabricated grain again
Grain.
The mixture dress of iron-bearing material, flux and denatured fuel is laid on trolley, is lighted a fire to mixture, exhausting is burnt
It ties, and detects the NO of sintering flue gas in sintering flue gas main pipelineXContent, and record as shown in table 2.To sintering sintering index into
Row is detected and is recorded as shown in table 3.
Comparative example 4
The basic content of the present embodiment with embodiment 1, the difference is that, sinter used in the present embodiment be granularity
< 8mm；Mixture dress is laid on trolley after sinter mixture will then be prepared, is lighted a fire to mixture, down draft sintering,
And the NO of sintering flue gas is detected in sintering flue gas main pipelineXContent, and record as shown in table 2.
Comparative example 5
The basic content of the present embodiment with embodiment 1, the difference is that, sinter granularity used in the present embodiment is
< 5mm；Mixture dress is laid on trolley after sinter mixture will then be prepared, is lighted a fire to mixture, down draft sintering,
And the NO of sintering flue gas is detected in sintering flue gas main pipelineXContent, and record as shown in table 2.
Table 2 tests emission reduction rate contrast table
Table 3 is sintered index contrast table
By to above-mentioned data compare and analyze it is available following as a result,
(1) embodiment 1 and comparative example 1 are compared, it, can be with from table 2 it can be found that by being modified to fuel
So that NO in sintering flue gasXConcentration by comparative example 1 (not carrying out the experiment of fuel reforming) 260mg.m-3Emission reduction is extremely
231mg.m-3, to significantly reduce the NO in sintering flue gasXContent, and have significant emission reduction effect；It is right at the same time
Ratio table 3 is sintered the data of index it can be found that embodiment 1 has not only reached preferable emission reduction effect, and makes sintered
The sintering index of journey is basically unchanged, and can reach preferable NO under the premise of guaranteeing Sintering Operation IndexXEmission reduction effect.
(2) embodiment 1 and comparative example 1~3 are compared it can be found that whether fuel reforming through the invention is also
It is to be attained by emission reduction NO by carrying out prefabricated grain to fuelXDense effect；But be worth analysis is mistake in fuel reforming
Cheng Zhong, it is only necessary to add 0.5% sinter and be modified and can make NOXEmission reduction efficiency reach 11.15%, and comparative example 2
NO when adding the sinter equal with fuel mass to fuel progress prefabricated grainXEmission reduction efficiency be only 5.38%, comparative example 3 adds
NO when adding as 1.5 times of fuel mass of sinter to fuel progress prefabricated grainXEmission reduction efficiency be only 8.85%.For the problem
Applicant does not understand after repeated thinking, and will do it demonstration by carrying out repeatedly internal discussion, next carries out to its possible reason
Description.
Before introducing the reason of two kinds of discharge-reducing method emission reductions have differences, first needs to highlight two kinds of discharge-reducing methods and deposit
Difference:
1) addition manner of sinter
Comparative example 2 (prefabricated grain) is by carrying out prefabricated grain for sinter and fuel, so that close between sinter and fuel
In conjunction with, and then promote NOx released in fuel combustion process that can be sintered the reduction of the ferrous acid calcium treating in mine, to realize
The emission reduction of sintering process NOx.And in order to improve the granulating efficiency of prefabricated grain, need to be continuously added into water rush during prefabricated grain
System grain.In contrast, the fuel reforming method in the embodiment of the present invention 1 specially requires under the dry condition, by sinter
Fines, which is added into fuel, carries out dry-mixed progress fuel reforming processing.
2) additional amount of sinter
At the same time, comparative example 2 (prefabricated grain) is in order to enable the fuel after prefabricated grain in denatured fuel can be with sinter
Fines comes into full contact with, so needing to be added a large amount of sinter fines during prefabricated grain；If during prefabricated grain only
The sinter fines that fuel mass 0.5% is added is modified, then sinter fines can not be in the denatured fuel after prefabricated grain
Fuel comes into full contact with, therefore when using comparative example 2 (prefabricated grain), the additional amount of sinter fines is relatively large, therefore compares
The additional amount of sinter fines is respectively 1 times and 1.5 times of fuel mass in example 2 (prefabricated grain).In contrast, the present invention is implemented
The fuel reforming technology of example 1, it is therefore intended that the modification to fuel, rather than emission reduction, therefore this hair are achieved the effect that by granulation
Bright fuel reforming technology only needs to be added relatively small number of sinter fines, so that it may achieve the effect that emission reduction, burn in embodiment 1
The additional amount of ramming material is the 0.5% of fuel mass.
It is next, the emission reduction effect of comparative example 2 (prefabricated grain) is inferior to 1 reason of embodiment:
After carrying out prefabricated grain, the mode of prefabricated grain hinders part to a certain extent for one, comparative example 2 (prefabricated grain)
The contact of fuel and outside O, so inhibiting part of fuel reaction to generate the reducibility gas such as CO makes the reduction process of NOx only
Solid C can be relied on to be restored as reducing agent；And embodiment 1 is realizing sinter during being modified to fuel
While fines and fuel come into full contact with, fuel will not be made to completely cut off completely with O, and then ensure that fuel is contacted with the effective of O,
Fuel is gone on smoothly in combustion process, so that non-complete combustion of fuel forms relatively great amount of CO reducibility gas,
And the NOx that CO can generate fuel combustion is restored, and then changes the reaction interface of NOx reduction；At this time NOx and CO it
Between reaction interface be gas-gas phase reaction interface, be compared to gas-solid phase reaction interface, reacted on gas-gas phase reaction interface
Reaction rate faster, and is reacted more abundant.And NOx is by the way that in CO reduction process, the calcium ferrite in sinter is easier
The reactant of gas phase is fully catalyzed, so that the reduction catalysts process of NOx is greatly promoted, so that NOx abatement rate
It significantly improves.
Secondly, in comparative example 2 (prefabricated grain) use process, since fuel combustion process is obstructed, so that fuel is difficult to quickly
It burns and causes fuel combustion temperature lower, since the temperature in fuel combustion process is lower, and since the reaction of NOx needs
It just can be carried out under the high temperature conditions, since fuel surface temperature is lower so that NOx reduction effect is insufficient；And embodiment 1 is right
During fuel is modified, since denatured fuel is more loose, so the fuel particle in denatured fuel can be with the external world
O come into full contact with, to carry out effective combustion reaction, and then generate and effectively improve ignition temperature, and high temperature is in addition to that can promote
Effective reduction reaction is carried out into NOx and CO, the mobility of calcium ferrite in sinter fines can also be improved, and then improve ferrous acid
Calcium is to the emission reduction efficiency of NOx, to realize the efficient emission-reducing of sintering process NOx.
Third, denatured fuel is produced by the way of prefabricated grain in comparative example 2 (prefabricated grain) use process, when fuel fires
When burning generation NOx, as previously mentioned, the reduction of NOx mainly passes through solid C and is restored at this time, and the mode of prefabricated grain
Cause the contact between particle more close again, causes the reduction of NOx that can only concentrate in limited region one by one carrying out, together
When but also the catalytic reduction reaction area of NOx is smaller.And embodiment 1 is during being modified fuel, due to modification
Fuel is more loose, and NOx mainly passes through gaseous CO and restored as previously mentioned, so the reduction of NOx can be with
Sufficiently reacted in a biggish region, at the same the calcium ferrite in sinter fines to the catalysis of NOx reduction have compared with
Big response area.
By analyzing above, it can be seen that prefabricated grain technology used in comparative example 2 is compared to, in embodiment 1
Fuel reforming technology has preferable NOx abatement effect.
(3) comparative example 2 and comparative example 3 are compared, while embodiment 1,7,8 and 9 is compared；By that will compare
Example 2 and comparative example 3 compare discovery, and 1.5 times of fuel mass of sinter fines emission reduction effect ratio is added in prefabricated grain technology
The sinter fines emission reduction effect that fuel mass 5% is added is good, and reason may be more for sintering feed fines additional amount, sinter
Contact of the sinter fines with fuel is more abundant in the pelletization of fines and fuel, and then prefabricated grain technology emission reduction effect is got over
It is good；Before comparing example 2 and comparative example 3, applicant has also especially tested the sinter fines of addition 5% and fuel carries out
Prefabricated grain, but since the additive amount of sinter fines is very little, do not achieve the effect that emission reduction after prefabricated grain substantially, therefore do not have
Special record experimental data.
But for the denatured fuel technology in the present invention, discovery when embodiment 1,7,8 and 9 is compared, if single
Solely from sintering NOx abatement, from Table 2, it can be seen that the sinter fines that fuel adds during modification is more,
Sintering process NOx abatement rate is higher；But the amount that can be seen that addition sinter fines again from table 3 is more, sintering process
Usage factor there is reduceds trend, solid fuel consumption has raised trend, it is possible to if the sintering that prediction addition is excessive
Mine fines, will lead to sintering index has biggish fluctuation, is unfavorable for sintering production.Thus it can be extrapolated that being not sinter fines
Additional amount it is more, the effect of fuel reforming is better.
(4) embodiment 1 and comparative example 1 are compared, then by the sintering index of comparative example 2, comparative example 3 and comparative example 1
It compares, 1 prefabricated grain technology of discovery comparative example 2 can make sintering index deteriorate, and the embodiment of the present invention 1 and comparative example
1 sintering index is substantially suitable, realizes emission reduction under the premise of guaranteeing Sintering Operation Index to NOx.
(5) comparative example 4, comparative example 5, embodiment 2, embodiment 3 and embodiment 4 are compared, finds the sintering used
Ore particle degree is bigger, and the sinter fines denatured fuel produced gone out using the sinter fine grinding is higher to the emission reduction rate of NOx,
Reason is in the biggish sinter of initial particle size that ferrous acid calcium content is more, so catalysis of this kind of sinter to NOx in fuel
Reduction effect is better.
(6) embodiment 1, embodiment 9 and embodiment 10 are compared, it is found that the granularity for the sinter fines being added is got over
Small, NOx abatement efficiency is higher, and reason is: during the sintering process, NOx mainly passes through CO and is restored；If denatured fuel
The granularity of middle sinter fines is smaller, and specific surface area is bigger, and the specific surface area of sinter fines is bigger, with gaseous NOx
Contacted with CO it is more, so calcium ferrite can come into full contact with gaseous NOx and CO in sinter fines, so that calcium ferrite can be with
Efficient catalytic is carried out to the reduction process of NOx；In addition sinter fines granularity is smaller, and sinter fines, which is more easily adhered, to be filled into
Between fuel particle, increase the touch opportunity with gaseous NOx and CO, so that sufficiently catalysis reduction is carried out to NOx, so that NOx
Emission reduction rate be improved.
(7) embodiment 5 and embodiment 1 are compared into discovery, the NOx abatement rate of embodiment 5 is higher than NOx in embodiment 1
Emission reduction rate, reason are: in embodiment 5, being added to the sinter fines after drying process during fuel crushing
In fuel, fuel is dry-mixed with the progress of sinter fines during broken, denatured fuel is made, broken mode can be logical
It crosses crusher and carries out Mechanical Crushing.On the one hand due to the strenuous vibration acceleration of sintering mine fines of fuel in the shattering process of fuel
It can be sufficiently mixed with fuel, acceleration of sintering mine fines comes into full contact with fuel surface in subsequent mixed process and in fuel
It is sufficient filling between particle；On the other hand, acceptable further acceleration of sintering mine fines grain in crusher is added in sinter fines
The refinement of degree is equally beneficial for the emission reduction of denatured fuel NOx during the sintering process.
(8) embodiment 11 and embodiment 1 are compared into discovery, the NOx abatement rate of embodiment 11 is higher than in embodiment 1
NOx abatement rate, reason are: quick lime and sinter fines are added into fuel carry out it is dry-mixed after, one side quick lime
The NOx that itself can be generated to fuel combustion carries out catalysis reduction；Another aspect quick lime can be with sinter fines and burning
The iron oxide contained in knot mixture is reacted, and new calcium ferrite is generated, and the NOx then generated again to fuel combustion is urged
Change reduction, to realize the raising of sintering process NOx abatement rate.
Embodiment 12
The present embodiment substantially with embodiment 1, the difference is that: sinter fines is dried, and is then being not added
Dry sinter fines is added in fuel under conditions of water and carries out dry-mixed, obtained denatured fuel.So that sinter fines
There is preferable dispersibility in fuel, can be distributed evenly in denatured fuel, improve sinter fines to NOx in fuel
Catalysis reduction effect.
Embodiment 13
The present embodiment substantially with embodiment 1, the difference is that: in the present embodiment by sinter carry out fine grinding, make
In sinter fines granularity less than the accounting of the sinter fines of 300 mesh be greater than 80%；It is compared with embodiment 1, as a result
Show that the emission reduction efficiency of NOx improves 8%.Its reason is that the sinter fines of: less than 300 mesh is easy in fuel particle surface shape
At one layer of very thin adhesion layer, and the sinter fines in the adhesion layer can be easier fully to be contacted with NOx,
So that the calcium ferrite in sinter fines carries out more efficiently catalysis to NOx and restores, and then realize effectively subtracting for NOx
Row.
Embodiment 14
The present embodiment substantially with embodiment 1, the difference is that: added in fuel reforming treatment process in the present embodiment
0.3%~3% CaCl2, joined the CaCl of fuel mass 0.5% in the present embodiment in fuel reforming treatment process2,
By its it is levigate after in fuel reforming treatment process simultaneously mix；It is compared with embodiment 1, the results showed that NOx's subtracts
It arranges efficiency and improves 6.7%.
Embodiment 15
The present embodiment substantially with embodiment 1, the difference is that: added in fuel reforming treatment process in the present embodiment
0.3%~3% potassium permanganate, the present embodiment in joined fuel mass 0.5% in fuel reforming treatment process will
It is mixed simultaneously in fuel reforming treatment process after its is levigate；It is compared with embodiment 1, the results showed that the emission reduction of NOx
Efficiency improves 5.1%.
Embodiment 16
The present embodiment substantially with embodiment 1, the difference is that: added in fuel reforming treatment process in the present embodiment
0.3%~3% steel slag joined the steel slag of fuel mass 0.5% in the present embodiment in fuel reforming treatment process, will
It is mixed simultaneously in fuel reforming treatment process after its is levigate；It is compared with embodiment 1, the results showed that the emission reduction of NOx
Efficiency improves 8.3%.Its reason is: contains CaO and ferriferous oxide in steel slag, is porous structure additionally, due to steel slag itself,
Specific surface area is larger, and the catalyst contained can carry out fully catalysis to NOx and restore.
Embodiment 17
The present embodiment substantially with embodiment 1, the difference is that: be added in fuel reforming treatment process in the present embodiment
The steel slag of fuel mass 0.5%, 0.5% potassium permanganate and 0.5% CaCl2, by its it is levigate after fuel reforming processing
It is mixed simultaneously in the process；It is compared with embodiment 1, the results showed that the emission reduction efficiency of NOx improves 9.7%.
Embodiment 18
The present embodiment substantially with embodiment 1, the difference is that: added in fuel reforming treatment process in the present embodiment
0.3%~3% K2CO3, 0.5% is added in the present embodiment, is compared with embodiment 1, so that the emission reduction of nitrogen oxides
Efficiency improves 5%.Its reason is: K2CO3On the one hand alkali metal, which can be played, plays catalytic action to the reduction process of NOx；Separately
Outer K2CO3The part CO decomposited2The CO of gas phase is generated with solid C, further promotes the reduction emission reduction of NOx.
Embodiment 19
The present embodiment substantially with embodiment 1, the difference is that also added 0.3% in fuel reforming treatment process~
3% CaCO3, 0.5% is added in the present embodiment, is compared with embodiment 1, so that the emission reduction efficiency of nitrogen oxides improves
7%.CaCO3It decomposes and generates CaO and CO2, one side CaO can play alkali metal and play catalytic action to the reduction process of NOx；
Other part CO2The CO of gas phase is generated with solid C, further promotes the reduction emission reduction of NOx.
Embodiment 20
The present embodiment substantially with embodiment 1, the difference is that: fuel used in the present embodiment be international trade coal dust, should
The N element content of international trade coal dust is 0.92%, and H element content is 2.09%, by denatured fuel made by it, then by iron content original
The mixture dress of material, flux and denatured fuel is laid on trolley, is lighted a fire to mixture, down draft sintering, and in sintering flue gas
The NO of sintering flue gas is detected in main pipelineXAverage emission concentration, and record as shown in table 4.
Embodiment 21
The present embodiment substantially with embodiment 1, the difference is that: fuel used in the present embodiment be prosperous all sources coal dust,
The N element content of the coal dust is 0.90%, and H element content is 1.39%, by denatured fuel made by it, then by iron content original
The mixture dress of material, flux and denatured fuel is laid on trolley, is lighted a fire to mixture, down draft sintering, and in sintering flue gas
The NO of sintering flue gas is detected in main pipelineXAverage emission concentration, and record as shown in table 4.
Embodiment 22
The present embodiment substantially with embodiment 1, the difference is that: fuel used in the present embodiment is that wind is melted coal dust, should
The N element content of coal dust is 0.84%, and H element content is 0.54%, by denatured fuel made by it, then by iron-bearing material,
The mixture of flux and denatured fuel dress is laid on trolley, is lighted a fire to mixture, down draft sintering, and is responsible in sintering flue gas
The NO of sintering flue gas is detected in roadXAverage emission concentration, and record as shown in table 4.
Embodiment 23
The present embodiment substantially with embodiment 1, the difference is that: fuel used in the present embodiment be coking coke powder, should
The N element content of coke powder is 1.03%, and H element content is 0.28%, by denatured fuel made by it, then by iron-bearing material,
The mixture of flux and denatured fuel dress is laid on trolley, is lighted a fire to mixture, down draft sintering, and is responsible in sintering flue gas
The NO of sintering flue gas is detected in roadXAverage emission concentration, and record as shown in table 4.
Embodiment 24
The present embodiment substantially with embodiment 1, the difference is that: fuel used in the present embodiment be ironmaking coke powder, should
The N element content of coke powder is 0.89%, and H element content is 0.27%, by denatured fuel made by it, then by iron-bearing material,
The mixture of flux and denatured fuel dress is laid on trolley, is lighted a fire to mixture, down draft sintering, and is responsible in sintering flue gas
The NO of sintering flue gas is detected in roadXAverage emission concentration, and record as shown in table 4.
Embodiment 25
The present embodiment substantially with embodiment 1, the difference is that: fuel used in the present embodiment be boat osmanthus coke powder, should
The N element content of coke powder is 0.80%, and H element content is 0.29%, by denatured fuel made by it, then by iron-bearing material,
The mixture of flux and denatured fuel dress is laid on trolley, is lighted a fire to mixture, down draft sintering, and is responsible in sintering flue gas
The NO of sintering flue gas is detected in roadXAverage emission concentration, and record as shown in table 4.
When using H content different fuel type, discharged nitrous oxides situation is had differences, and table 4 is variety classes
Fuel contains H, N amount and its discharged nitrous oxides concentration.
4 variety classes fuel of table contains H, N content and its discharged nitrous oxides concentration
By the data of table 4, as it can be seen that it has on the whole in fuel, the fewer discharged nitrous oxides concentration of H element is lower to become
Gesture；And for the N element in fuel, coking coke powder and several coal dusts are compared and analyzed into discovery, the N element in coking coke powder
Content is higher than several coal dusts, but its discharged nitrous oxides concentration is but far below several coal dusts, traces it to its cause and finds coking coke powder
Middle H element content is lower.
The researcher of research sintering process nitrogen oxides generally believes in terms of the control of source at present, controls in fuel
N element content can effectively control the discharge amount of nitrogen oxides.But by above-mentioned number it has been found that be compared to N element content,
H element content also have a large impact on the concentration of emission of fuel nitrogen oxides, or even plays than N element and more importantly make
With, and pass through the formation mechanism of research nitrogen oxides, N is converted to the process of NOx in discovery fuel are as follows:
N+H+C=HCN
HCN+O=NCO+H
NCO+O=NO+CO
It can be seen that catalyst is played the role of in conversion of the presence of H to N to NO in fuel in fuel, therefore reduce in fuel
The emission reduction of sintering process nitrogen oxides may be implemented in H element content to a certain extent.
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
It is carry out various modifications in the case where from the scope of the present invention being defined by the following claims and modification.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
It falls into the scope of the present invention described herein.In addition, Development Status and meaning that background technique is intended in order to illustrate this technology,
It is not intended to limit the present invention or the application and application field of the invention.
Claims (10)
1. a kind of denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx, it is characterised in that: including sinter and combustion
Material, the additional amount of sinter is the 0.5%~5% of fuel gross mass.
2. a kind of denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx according to claim 1, feature
Be: the additional amount of sinter is the 1%~2% of fuel gross mass.
3. a kind of denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx according to claim 1, feature
Be: the granularity of used sinter is greater than 5mm.
4. a kind of denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx according to claim 1, feature
Be: sinter needs to be broken into sinter fines, and the partial size of sinter fines is not more than 0.5mm.
5. a kind of denatured fuel for emission reduction NOx in sintering process according to claim 1, it is characterised in that: fuel
The mass content of middle H is less than 0.5%.
6. a kind of denatured fuel for emission reduction NOx in sintering process according to claim 3, it is characterised in that: sintering
Mine is the combination of one or more in BF return fines, finished product sinter or hearth layer for sintering.
7. a kind of preparation method of the denatured fuel based on reduction catalysts Ore Sintering Process emission reduction NOx, it is characterised in that: first will
Sinter carries out fine grinding, obtains sinter fines；Then under conditions of water is not added by sinter fines be added in fuel into
Row is dry-mixed, and denatured fuel is made.
8. a kind of preparation method for the denatured fuel of emission reduction NOx in sintering process according to claim 7, feature exist
In: sinter fines is dried, and then dry sinter fines is added in fuel under conditions of water is not added
Carry out dry-mixed, obtained denatured fuel.
9. a kind of preparation method for the denatured fuel of emission reduction NOx in sintering process according to claim 7, feature exist
In: during fuel crushing dry sinter fines is added in fuel, fuel during broken with sintering
Mine fines carries out dry-mixed, obtained denatured fuel.
10. a kind of preparation method for the denatured fuel of emission reduction NOx in sintering process according to claim 7, feature
It is: sinter fines and quick lime is added into fuel under conditions of water is not added and carry out dry-mixed, obtained denatured fuel.
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| JP2005290456A (en) * | 2004-03-31 | 2005-10-20 | Nippon Steel Corp | Highly combustible coal for sintering, manufacturing method therefor, and method for manufacturing sintered ore with the use of the coal |
| CN105087906A (en) * | 2015-08-27 | 2015-11-25 | 中南大学 | Method for reducing NOx emission in iron ore sintering process |
| CN107326176A (en) * | 2017-06-23 | 2017-11-07 | 钢研晟华工程技术有限公司 | It is a kind of to reduce agglomeration for iron mine NO simultaneouslyxAnd SO2The raw material of discharge is prepared and sintering method |
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| CN114438314A (en) * | 2022-01-21 | 2022-05-06 | 酒泉钢铁(集团)有限责任公司 | Process for using stainless steel pickling sludge as iron ore concentrate sintering ingredient |
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