CN108950191B - Carbon-containing briquette for preparing full-concentrate sintering mixture and mixture preparation method - Google Patents
Carbon-containing briquette for preparing full-concentrate sintering mixture and mixture preparation method Download PDFInfo
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- CN108950191B CN108950191B CN201810897025.4A CN201810897025A CN108950191B CN 108950191 B CN108950191 B CN 108950191B CN 201810897025 A CN201810897025 A CN 201810897025A CN 108950191 B CN108950191 B CN 108950191B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 136
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 124
- 239000000203 mixture Substances 0.000 title claims abstract description 121
- 238000005245 sintering Methods 0.000 title claims abstract description 86
- 239000012141 concentrate Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000004484 Briquette Substances 0.000 title abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 76
- 229910052742 iron Inorganic materials 0.000 claims abstract description 38
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 29
- 239000000428 dust Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000000292 calcium oxide Substances 0.000 claims abstract description 18
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 18
- 239000003245 coal Substances 0.000 claims abstract description 12
- 239000000446 fuel Substances 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000004364 calculation method Methods 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 21
- 230000009977 dual effect Effects 0.000 claims description 16
- 238000005453 pelletization Methods 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 10
- 239000000440 bentonite Substances 0.000 claims description 7
- 229910000278 bentonite Inorganic materials 0.000 claims description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 7
- 239000007767 bonding agent Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 5
- 235000019738 Limestone Nutrition 0.000 claims description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 5
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 5
- 239000003830 anthracite Substances 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 5
- 239000004571 lime Substances 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- OOSYCERWOGUQJY-UHFFFAOYSA-N calcium;dioxido(dioxo)manganese Chemical compound [Ca+2].[O-][Mn]([O-])(=O)=O OOSYCERWOGUQJY-UHFFFAOYSA-N 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000010586 diagram Methods 0.000 claims description 4
- 238000005457 optimization Methods 0.000 claims description 4
- 239000012286 potassium permanganate Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000002028 Biomass Substances 0.000 claims description 3
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 239000003077 lignite Substances 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- -1 semicoke Substances 0.000 claims description 3
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 3
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 230000035699 permeability Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 238000003825 pressing Methods 0.000 abstract 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 18
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009818 secondary granulation Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A carbon-containing briquette for preparing a full-concentrate sintered mixture and a mixture preparation method are disclosed, wherein a mixture B is formed by a mixture A and quicklime, and the addition amount of the quicklime is adjusted to enable the binary alkalinity of the mixture B to be 1.8-2.2; performing cold setting molding on the uniformly mixed mixture B by a briquetting machine, wherein the molding pressure is 10-20 MPa, and preparing carbon-containing briquettes; the mixture A comprises the following preparation raw materials in parts by weight: 40 to 50 portions of iron ore concentrate, 20 to 30 portions of metallurgical dust, 15 to 25 portions of low-price fuel, 1 to 4 portions of adhesive and 1 to 4.5 portions of oxygen producing agent. According to the invention, the special pressing blocks are added into the sintering mixture, and the proportion of the pressing blocks is optimized through mathematical calculation, so that the air permeability of the sintering mixture can be increased, and the sintering utilization coefficient can be improved. The invention adds oxygen producing agent, low-price coal and metallurgical dust and mud into the briquette, on one hand, the oxygen content of the material layer is increased, on the other hand, the low-price coal and the metallurgical dust and mud are applied to sintering production, the quality of the sinter is improved, and the cost is reduced.
Description
Technical field
The present invention relates to ironmaking production technical field more particularly to a kind of it is used to prepare the carbon containing of full concentrate sinter mixture
Agglomerate and mixing preparation method for material.
Background technique
Sintering process is the important link in ironmaking technology, is easy to for the powdery mixed raw material for being not easy to smelt to be sintered to
The sinter of smelting.Iron ore is the important source material for producing sinter, is broadly divided into two large divisions, first is that the iron that is produced from own mine
Concentrate powder, second is that the rich ore powder of import, such as rich ore powder of Brazil and Australia.It is continuous with domestic steel production capacity in recent years
Expand, the demand to iron ore is continuously increased, and iron ore price is caused to go up, and the production cost increases for iron and steel enterprise, many thus
Iron and steel enterprise has to the yield for improving own mine iron ore concentrate, to alleviate the rising of steel cost.
And self-produced iron ore concentrate granularity is thinner, -200 purposes account for 90% or more, and sintering character is poor.After concentrate proportion improves,
Permeability of sintering material bed can be made to deteriorate, sintering negative pressure increases, and fan capacity is not able to satisfy production requirement, it is each to seriously affect sinter
Item technical indicator.Generally take following measure to improve permeability of sintering material bed: (1) some import rich ore powders of adapted improve
Sintering raw material condition;(2) bed of material is thinned, reduces machine speed, to delay its reaction speed, guarantees Ore-forming time.With addition of import rich ore
Powder can make home-made concentrate proportion that cannot improve, and increased production cost for iron and steel enterprise;The bed of material is thinned, reduction machine speed can make to be sintered mineral products
Amount reduces.
The graininess degree of sinter mixture, such as the size of particle diameter have direct shadow to the gas permeability of mixture
It rings.Gas permeability refers to that solid granule layer allows the complexity that passes through of gas, and measures the mark of mixture porosity, can be with
With the graininess degree of mixture ventilation reflection mixture.Flow condition and changing rule of the gas in sinter bed influence
Mass transfer, heat transfer and the physical-chemical reaction of sintering process, directly decision vertical sintering speed.Permeability of sintering material bed is good, leads to
The air capacity entered in sinter bed is abundant, is beneficial to the progress of each physical-chemical reaction of sinter bed.Therefore, how to mention
High bed permeability becomes this field technical problem urgently to be resolved.
Patent 200810302466.1 discloses a kind of granulating sinter mixture method, using pelletizing twice, first by part
Iron ore concentrate and quick lime mix plus iron ore concentrate bead is made in water;Then by iron ore concentrate bead and coke powder, flux, return mine, gas ash
It is mixed with Iron Ore Powder and remaining iron ore concentrate, carries out secondary granulation.Although this method uses secondary granulation, to a certain degree
On improve the gas permeability of sinter bed, but be still added to the rich ore powder of significant proportion, and do not consider return mine granularity, fuel
Granularity and flux granularity are to iron ore concentrate sintered influence.
Patent 201310236432.8 discloses the industrial production process of high fine powder rate ore agglomerates a kind of, by iron-bearing material
After the bentonite of weight percent 2%~6% mixes, it is prepared into acid green-ball, green-ball granularity is 4mm~10mm;By raw material are as follows:
Mixing, Imported powder iron ore, lime stone, light dolomite, quick lime and the coke powder of iron ore concentrate or iron ore concentrate and ultra-fine iron ore concentrate
High-basicity sintering mixture after a batch mixer, rerolling machine carry out mixed pelletization respectively, enter sintering feed skin
Before band, acid green-ball is added and constitutes soda acid mixture, the additional amount of green-ball accounts for high-basicity sintering material weight percent
20%~60%;Soda acid mixture is wired on pallet by swinging belt, wide belt, the nine roller feeder, by lighting a fire,
Roasting obtains high-quality ore agglomerates.This method pelletizes twice to sinter mixture, and the ventilative of fine powder rate sinter bed can be improved
Property, but this method is still added to the import rich ore of high price, and easily causes the basicity fluctuation of sinter.
Summary of the invention
The present invention provides a kind of carbon-bearing lump for being used to prepare full concentrate sinter mixture and mixing preparation method for material, are
In order to improve the gas permeability of full concentrate sinter bed, increases the oxygen content of the bed of material, improve sinter mixture into mine ability;Make simultaneously
Low price coal dust is applied to sintering production, reduces sintering solid burnup.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
It is used to prepare the carbon-bearing lump of full concentrate sinter mixture, mixture B is formed by mixture A and quick lime, is adjusted
Quick lime additive amount makes the dual alkalinity 1.8~2.2 of mixture B;Mixture B after mixing is freezed off through cuber
Molding, briquetting pressure are 10MPa~20MPa, are prepared into carbon-bearing lump;The preparation raw material and mass fraction of the mixture A are as follows:
40 parts~50 parts of iron ore concentrate, 20 parts~30 parts of metallurgical dust, 15 parts~25 parts of low price fuel, 1 part~4 parts of bonding agent, oxygen-making agent 1
Part~4.5 parts.
The metallurgical dust is that sintering dust separation ash, pelletizing dedusting ash, gas ash are one such or several, and granularity is small
85% is no less than in 200 purposes.
The mix surface for being sprayed at rolling in the form of gas conveying for metallurgical dust with add mode of the metallurgical dust,
The delivery rate of gas is controlled in 3.5m3/h-8.5m3/h。
The bonding agent is one of bentonite, waterglass, sodium humate, sodium carboxymethylcellulose and polyacrylamide
Or it is several.
The low price fuel is the collocation of one or more of lignite, anthracite, meager coal, lean coal, semicoke, biomass carbon.
The oxygen-making agent is one or more of acerdol, calcium manganate, potassium permanganate, and addition manner is will oxygen processed
Mixture A is added in the completely soluble obtained oxygen-making agent solution of agent, oxygen-making agent solution in the form of atomized water.
A diameter of 8mm~the 12mm of carbon-bearing lump, compression strength are greater than 500N.
The method for preparing full concentrate sinter mixture using carbon-bearing lump is in sinter mixture with addition of carbon-bearing lump,
Carbon-bearing lump is with addition of ratio as obtained by specific calculation optimization, the specific steps are as follows:
1) iron ore concentrate, coke powder, quick lime mixed pelletization are obtained into sinter mixture C, wherein coke powder mass percent be 2%~
4.5%, Lime Quality percentage 2%~5%, remaining is iron ore concentrate;Primary is made with addition of lime stone into sinter mixture C
Sinter mixture, the dual alkalinity of primary sinter mixture are 1.8~2.2;
2) be made ultimate sinter mixture with addition of carbon-bearing lump into primary sinter mixture, carbon-bearing lump with addition of ratio
It determines by the following method:
The sintering test with addition of different proportion carbon-bearing lump is carried out using ultimate sinter mixture, obtains matching with carbon-bearing lump
Than corresponding sintering usage factor, sintering solid burnup and sintered ore rotary drum strength;To different carbon-bearing lumps proportion and relatively
The scatterplot that the sintering usage factor answered is constituted carries out fitting of a polynomial, obtains between carbon-bearing lump proportion and sintering usage factor
Matched curve L expression formula;The scatterplot constituted to different carbon-bearing lumps proportion and corresponding sintering solid burnup carries out multinomial
Fitting obtains the matched curve M expression formula between carbon-bearing lump proportion and sintering solid burnup;To different carbon-bearing lumps proportion and
The scatterplot that corresponding sintered ore rotary drum strength is constituted carries out fitting of a polynomial, and it is strong with sinter rotary drum to obtain carbon-bearing lump proportion
Matched curve N expression formula between degree;
Maximum is taken to the sintering usage factor in the matched curve L expression formula, corresponding carbon-bearing lump is acquired and matches
Than;To the sintering solid burnup minimalization in the matched curve M expression formula, corresponding carbon-bearing lump proportion is acquired;It is right
Sintered ore rotary drum strength in the matched curve N expression formula takes maximum, acquires corresponding carbon-bearing lump proportion;
According to one, two or three in 3 sintering usage factor, sintering solid burnup and sintered ore rotary drum strength indexs
Section where item extreme value, obtains the optimum proportioning of carbon-bearing lump in ultimate sinter mixture.
The dual alkalinity of the primary sinter mixture is identical as the dual alkalinity of carbon-bearing lump.
Compared with prior art, the beneficial effects of the present invention are:
1) present invention in sinter mixture with addition of special briquetting, and by mathematical computations optimization briquetting with addition of ratio,
Sintered mixture ventilation can be increased, improve sintering usage factor.
2) on the one hand the present invention increases the oxygen content of the bed of material, separately with addition of oxygen-making agent, low price coal and metallurgical dust sludge in briquetting
On the one hand so that low price coal and metallurgical dust sludge is applied to sintering production, sinter quality can be improved, reduce sintering cost.
Detailed description of the invention
Fig. 1 is that 1 carbon-bearing lump of embodiment proportion and the relationship matched curve L of usage factor scheme.
Fig. 2 is that 2 carbon-bearing lump of embodiment proportion and the relationship matched curve L of usage factor scheme.
Fig. 3 is that 2 carbon-bearing lump of embodiment proportion and the relationship matched curve M of solid burnup scheme.
Fig. 4 is that 2 carbon-bearing lump of embodiment proportion and the relationship matched curve N of drum strength scheme.
Specific embodiment
Below with reference to embodiment, specific embodiments of the present invention will be further explained:
It is used to prepare the carbon-bearing lump of full concentrate sinter mixture, mixture B is formed by mixture A and quick lime, is adjusted
Quick lime additive amount makes the dual alkalinity 1.8~2.2 of mixture B;Mixture B after mixing is freezed off through cuber
Molding, briquetting pressure are 10MPa~20MPa, are prepared into carbon-bearing lump;The preparation raw material and mass fraction of the mixture A are as follows:
40 parts~50 parts of iron ore concentrate, 20 parts~30 parts of metallurgical dust, 15 parts~25 parts of low price fuel, 1 part~4 parts of bonding agent, oxygen-making agent 1
Part~4.5 parts.
The metallurgical dust is that sintering dust separation ash, pelletizing dedusting ash, gas ash are one such or several, and granularity is small
85% is no less than in 200 purposes.
The mix surface for being sprayed at rolling in the form of gas conveying for metallurgical dust with add mode of the metallurgical dust,
The delivery rate of gas is controlled in 3.5m3/h-8.5m3/h。
The bonding agent is one of bentonite, waterglass, sodium humate, sodium carboxymethylcellulose and polyacrylamide
Or it is several.
The low price fuel is the collocation of one or more of lignite, anthracite, meager coal, lean coal, semicoke, biomass carbon.
The oxygen-making agent is one or more of acerdol, calcium manganate, potassium permanganate, and addition manner is will oxygen processed
Mixture A is added in the completely soluble obtained oxygen-making agent solution of agent, oxygen-making agent solution in the form of atomized water.
A diameter of 8mm~the 12mm of carbon-bearing lump, compression strength are greater than 500N.
The method for preparing full concentrate sinter mixture using carbon-bearing lump is in sinter mixture with addition of carbon-bearing lump,
Carbon-bearing lump is with addition of ratio as obtained by specific calculation optimization, the specific steps are as follows:
1) iron ore concentrate, coke powder, quick lime mixed pelletization are obtained into sinter mixture C, wherein coke powder mass percent be 2%~
4.5%, Lime Quality percentage 2%~5%, remaining is iron ore concentrate;Primary is made with addition of lime stone into sinter mixture C
Sinter mixture, the dual alkalinity of primary sinter mixture are 1.8~2.2;
2) be made ultimate sinter mixture with addition of carbon-bearing lump into primary sinter mixture, carbon-bearing lump with addition of ratio
It determines by the following method:
The sintering test with addition of different proportion carbon-bearing lump is carried out using ultimate sinter mixture, obtains matching with carbon-bearing lump
Than corresponding sintering usage factor, sintering solid burnup and sintered ore rotary drum strength;To different carbon-bearing lumps proportion and relatively
The scatterplot that the sintering usage factor answered is constituted carries out fitting of a polynomial, obtains between carbon-bearing lump proportion and sintering usage factor
Matched curve L expression formula;The scatterplot constituted to different carbon-bearing lumps proportion and corresponding sintering solid burnup carries out multinomial
Fitting obtains the matched curve M expression formula between carbon-bearing lump proportion and sintering solid burnup;To different carbon-bearing lumps proportion and
The scatterplot that corresponding sintered ore rotary drum strength is constituted carries out fitting of a polynomial, and it is strong with sinter rotary drum to obtain carbon-bearing lump proportion
Matched curve N expression formula between degree;
Maximum is taken to the sintering usage factor in the matched curve L expression formula, corresponding carbon-bearing lump is acquired and matches
Than;To the sintering solid burnup minimalization in the matched curve M expression formula, corresponding carbon-bearing lump proportion is acquired;It is right
Sintered ore rotary drum strength in the matched curve N expression formula takes maximum, acquires corresponding carbon-bearing lump proportion;
According to one, two or three in 3 sintering usage factor, sintering solid burnup and sintered ore rotary drum strength indexs
Section where item extreme value, obtains the optimum proportioning of carbon-bearing lump in ultimate sinter mixture.
The dual alkalinity of the primary sinter mixture is identical as the dual alkalinity of carbon-bearing lump.
Embodiment 1:
Full concentrate sintered compound preparation method for material, with addition of a kind of special carbon-bearing lump, carbon-bearing lump in sinter mixture
Specific step is as follows for preparation: 1) preparing carbon-bearing lump.Iron ore concentrate, pelletizing dedusting ash, bentonite, anthracite, high violent sour calcium composition
Mixture A, mass percent are as follows: 42 parts of iron ore concentrate, 24 parts of pelletizing dedusting ash, 17 parts of anthracite, 2.2 parts of bentonite, Gao Meng
2 parts of sour calcium;Pelletizing dedusting ash granularity is to account for 90% less than 200 purposes, is pelletizing dedusting ash with gas conveying shape with add mode
State is sprayed at the mix surface of rolling, and the delivery rate of gas is controlled in 4m3/h;The addition manner of oxygen-making agent acerdol is
By the completely soluble obtained oxygen-making agent solution of oxygen-making agent, mixture A is added in oxygen-making agent solution in the form of atomized water;Mixture A
Mixture B is formed with quick lime, quick lime additive amount is adjusted, makes the dual alkalinity 1.95 of mixture B;By the mixing after mixing
Material B carries out freezing off molding through cuber, and briquetting pressure 14MPa is prepared into carbon-bearing lump, the diameter of the agglomerate for 8mm~
12mm, compression strength are greater than 500N.
Iron ore concentrate, coke powder, quick lime mixed pelletization are obtained into sinter mixture C, wherein coke powder mass percent is 3%, raw
Lime quality percentage 2.5%, remaining is iron ore concentrate;Primary sintered compound is made with addition of agstone into sinter mixture C
Material, the dual alkalinity of primary sinter mixture are 1.8~2.2.Ultimate burning is obtained with addition of carbon-bearing lump into primary sinter mixture
Mixture is tied, carbon-bearing lump determines by the following method with addition of ratio: being carried out using ultimate sinter mixture with addition of not year-on-year
The sintering test of example carbon-bearing lump, it is as shown in table 1 to obtain sintering usage factor corresponding with carbon-bearing lump proportion.
The relationship of 1 carbon-bearing lump of table proportion and usage factor
The scatterplot constituted to different carbon-bearing lumps proportion and corresponding sintering usage factor carries out fitting of a polynomial, such as schemes
Shown in 1;Obtain the matched curve L expression formula between carbon-bearing lump proportion and sintering usage factor:
Y=1.22868+0.03522*X-0.00154*X^2 (R2=0.93838)
Maximum is taken to the sintering usage factor in matched curve L expression formula, it is known that curve L takes when X is equal to 11.435
Maximum is obtained, i.e., when carbon-bearing lump proportion is 11.435%, sintering usage factor is maximum.
Tried into sinter mixture not with addition of carbon-bearing lump (benchmark) and with addition of the sintering of 11.435% carbon-bearing lump
It tests, obtains with addition of sintering usage factor after carbon-bearing lump by the 1.245t/ (h.m of benchmark2) increase to 1.438t/ (h.m2), sintering
Solid burnup is reduced to 39kg/t by the 45kg/t of benchmark, and sintered ore rotary drum strength increases by 83.91% by the 78.43% of benchmark.
Embodiment 2:
Full concentrate sintered compound preparation method for material, with addition of a kind of special carbon-bearing lump, carbon-bearing lump in sinter mixture
Specific step is as follows for preparation: 1) preparing carbon-bearing lump.Iron ore concentrate, metallurgical dust, binder, low price fuel, oxygen-making agent composition are mixed
Close material A, mass percent be 48 parts of iron ore concentrate, 26 parts of metallurgical dust, 24 parts of low price fuel, 4 parts of bonding agent, 3 parts of oxygen-making agent;
Wherein metallurgical dust is sintering dust separation ash and gas ash, and binder is bentonite and sodium humate, and low price fuel is meager coal and thin
Coal, oxygen-making agent are potassium permanganate and calcium manganate;Metallurgical dust granularity is to account for 85% less than 200 purposes, is metallurgy with add mode
Dust is sprayed at the mix surface of rolling in the form of gas conveys, and the delivery rate of gas is controlled in 6.4m3/h;Oxygen-making agent adds
Add mode is by the completely soluble obtained oxygen-making agent solution of oxygen-making agent, and mixture A is added in oxygen-making agent solution in the form of atomized water;
Mixture A and quick lime form mixture B, adjust quick lime additive amount, make the dual alkalinity 2.15 of mixture B;It will mix
Mixture B afterwards carries out freezing off molding through cuber, and briquetting pressure 18MPa is prepared into carbon-bearing lump, and the diameter of the agglomerate is
For 8mm~12mm, compression strength is greater than 500N.
Iron ore concentrate, coke powder, quick lime mixed pelletization are obtained into sinter mixture C, wherein coke powder mass percent is 4%, raw
Lime quality percentage 4.5%, remaining is iron ore concentrate;Primary sinter mixture is made with addition of lime stone into sinter mixture C,
The dual alkalinity of primary sinter mixture is 2.15.
Into primary sinter mixture with addition of the ultimate sinter mixture of carbon-bearing lump, carbon-bearing lump passes through with addition of ratio
Following method determines: carry out the sintering test with addition of different proportion carbon-bearing lump using ultimate sinter mixture, obtain with it is carbon containing
It is as shown in table 2 that agglomerate matches corresponding sintering usage factor, solid burnup and sintered ore rotary drum strength.
The relationship of 2 carbon-bearing lump of table proportion and sintering index
It is drawn and is dissipated with different carbon-bearing lumps proportion and corresponding sintering usage factor, solid burnup and sintered ore rotary drum strength
Point diagram carries out fitting of a polynomial to correlation scatter diagram, as shown in figs 2-4.Obtain carbon-bearing lump proportion and sintering usage factor
Between matched curve L expression formula: Y=1.2099+0.03801*X-0.00164*X^2 (R2=0.94632);Carbon-bearing lump is matched
Than the matched curve M expression formula between sintering solid burnup: Y=45.013-0.75839*X+0.03147*X^2 (R2=
0.96827);Matched curve N expression formula between carbon-bearing lump proportion and sintered ore rotary drum strength: Y=77.35+0.98071*
X-0.0417*X^2(R2=0.99033).
Maximum is taken to the sintering usage factor in matched curve L expression formula, it is known that curve L takes when X is equal to 11.588
Maximum is obtained, i.e., when carbon-bearing lump proportion is 11.588%, sintering usage factor is maximum;To in matched curve M expression formula
Sintering solid burnup minimalization, it is known that curve M obtains minimum when X is equal to 12.05, i.e., when carbon-bearing lump proportion is
When 12.05%, sintering solid burnup is minimum.Maximum is taken to the sintered ore rotary drum strength in matched curve N expression formula, it is known that bent
Line N obtains maximum when X is equal to 11.759, i.e., when carbon-bearing lump proportion is 11.759%, sintered ore rotary drum strength is maximum.
Sintering index, the suitable proportions of carbon-bearing lump such as comprehensive sintering usage factor, solid burnup and sintered ore rotary drum strength are
11.5%~12.1%.
It carries out into sinter mixture not with addition of carbon-bearing lump (benchmark) and with addition of the sintering test of 11.8% carbon-bearing lump,
It obtains with addition of sintering usage factor after carbon-bearing lump by the 1.226t/ (h.m of benchmark2) increase to 1.441t/ (h.m2), sintering is solid
Body burnup is reduced to 39.04kg/t by the 45.8kg/t of benchmark, and sintered ore rotary drum strength is increased by the 77.52% of benchmark
84.12%.
Claims (7)
1. the method for preparing full concentrate sinter mixture using carbon-bearing lump, which is characterized in that with addition of containing in sinter mixture
Carbon agglomerate, carbon-bearing lump is with addition of ratio as obtained by specific calculation optimization, the specific steps are as follows:
1) iron ore concentrate, coke powder, quick lime mixed pelletization are obtained into sinter mixture C, wherein coke powder mass percent is 2%~4.5%,
Lime Quality percentage 2%~5%, remaining is iron ore concentrate;Primary sintered compound is made with addition of lime stone into sinter mixture C
Material, the dual alkalinity of primary sinter mixture are 1.8~2.2;
2) ultimate sinter mixture is made with addition of carbon-bearing lump into primary sinter mixture, carbon-bearing lump passes through with addition of ratio
Following method determines:
The sintering test with addition of different proportion carbon-bearing lump is carried out using ultimate sinter mixture, obtains matching phase with carbon-bearing lump
Corresponding sintering usage factor, sintering solid burnup and sintered ore rotary drum strength;Different carbon-bearing lumps are matched and corresponding
It is sintered the scatterplot that usage factor is constituted and carries out fitting of a polynomial, obtain the fitting between carbon-bearing lump proportion and sintering usage factor
Curve L expression formula;The scatterplot constituted to different carbon-bearing lumps proportion and corresponding sintering solid burnup carries out fitting of a polynomial,
Obtain the matched curve M expression formula between carbon-bearing lump proportion and sintering solid burnup;To different carbon-bearing lumps proportion and relatively
The scatterplot that the sintered ore rotary drum strength answered is constituted carries out fitting of a polynomial, obtain carbon-bearing lump proportion and sintered ore rotary drum strength it
Between matched curve N expression formula;
Maximum is taken to the sintering usage factor in the matched curve L expression formula, acquires corresponding carbon-bearing lump proportion;It is right
Sintering solid burnup minimalization in the matched curve M expression formula acquires corresponding carbon-bearing lump proportion;To described quasi-
The sintered ore rotary drum strength closed in curve N expression formula takes maximum, acquires corresponding carbon-bearing lump proportion;Using following two
One of mode acquires the optimum proportioning of carbon-bearing lump in ultimate sinter mixture;
(1) scatterplot that carbon-bearing lump proportion and corresponding sintering usage factor are constituted carries out fitting of a polynomial, to matched curve L
Sintering usage factor in expression formula takes maximum, and corresponding carbon-bearing lump proportion is optimum proportioning;
(2) it is drawn and is dissipated with different carbon-bearing lumps proportion and corresponding sintering usage factor, solid burnup and sintered ore rotary drum strength
Point diagram carries out fitting of a polynomial to correlation scatter diagram, obtains the matched curve L between carbon-bearing lump proportion and sintering usage factor
Expression formula, the matched curve M expression formula between carbon-bearing lump proportion and sintering solid burnup, carbon-bearing lump proportion turn with sinter
Matched curve N expression formula between drum intensity, comprehensive sintering usage factor, solid burnup and sintered ore rotary drum strength index, obtains
To the optimum proportioning of carbon-bearing lump;
The carbon-bearing lump forms mixture B by mixture A and quick lime, adjusts quick lime additive amount, make mixture B's
Dual alkalinity is 1.8~2.2;Mixture B after mixing is carried out to freeze off molding through cuber, briquetting pressure is 10MPa~20
MPa is prepared into carbon-bearing lump;The preparation raw material and mass fraction of the mixture A are as follows: 40 parts~50 parts of iron ore concentrate, metallurgical powder
20 parts~30 parts of dirt, 15 parts~25 parts of low price fuel, 1 part~4 parts of bonding agent, 1 part~4.5 parts of oxygen-making agent;
The low price fuel is the collocation of one or more of lignite, anthracite, meager coal, lean coal, semicoke, biomass carbon.
2. the method according to claim 1 for preparing full concentrate sinter mixture using carbon-bearing lump, which is characterized in that institute
The dual alkalinity for stating primary sinter mixture is identical as the dual alkalinity of carbon-bearing lump.
3. the method according to claim 1 for preparing full concentrate sinter mixture using carbon-bearing lump, which is characterized in that institute
It is one such or several for sintering dust separation ash, pelletizing dedusting ash, gas ash to state metallurgical dust, granularity is less than 200 purposes
No less than 85%.
4. the method according to claim 1 for preparing full concentrate sinter mixture using carbon-bearing lump, which is characterized in that institute
State the mix surface for being sprayed at rolling in the form of gas conveying for metallurgical dust with add mode of metallurgical dust, the conveying of gas
Rate control is in 3.5m3/h-8.5m3/h。
5. the method according to claim 1 for preparing full concentrate sinter mixture using carbon-bearing lump, which is characterized in that institute
Stating bonding agent is one or more of bentonite, waterglass, sodium humate, sodium carboxymethylcellulose and polyacrylamide.
6. the method according to claim 1 for preparing full concentrate sinter mixture using carbon-bearing lump, which is characterized in that institute
Stating oxygen-making agent is one or more of acerdol, calcium manganate, potassium permanganate, and addition manner is to be completely dissolved in oxygen-making agent
Oxygen-making agent solution is made in water, and mixture A is added in oxygen-making agent solution in the form of atomized water.
7. the method according to claim 1 for preparing full concentrate sinter mixture using carbon-bearing lump, which is characterized in that institute
A diameter of 8mm~the 12mm of carbon-bearing lump is stated, compression strength is greater than 500N.
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CN113720167A (en) * | 2020-05-26 | 2021-11-30 | 宝山钢铁股份有限公司 | Integrated method and system for drying and screening lump ore by using sintering waste heat |
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