CN108950191A - It is used to prepare the carbon-bearing lump and mixing preparation method for material of full concentrate sinter mixture - Google Patents
It is used to prepare the carbon-bearing lump and mixing preparation method for material of full concentrate sinter mixture Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
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- C22B1/242—Binding; Briquetting ; Granulating with binders
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Abstract
A kind of carbon-bearing lump being used to prepare full concentrate sinter mixture and mixing preparation method for material forms mixture B by mixture A and quick lime, and adjustment quick lime additive amount makes the dual alkalinity 1.8~2.2 of mixture B；Mixture B after mixing is carried out to freeze off molding through cuber, briquetting pressure is 10MPa~20MPa, is prepared into carbon-bearing lump；The preparation raw material and mass fraction of 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, 1 part~4.5 parts of oxygen-making agent.The present invention optimizes briquetting with addition of ratio with addition of special briquetting, and by mathematical computations in sinter mixture, can increase sintered mixture ventilation, improve sintering usage factor.The present invention, with addition of oxygen-making agent, low price coal and metallurgical dust sludge, on the one hand increases the oxygen content of the bed of material in briquetting, so that low price coal and metallurgical dust sludge is applied to sintering production, improves sinter quality, reduce cost.
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 (9)
1. being used to prepare the carbon-bearing lump of full concentrate sinter mixture, which is characterized in that be made of and mix with quick lime mixture A
Expect B, adjusts quick lime additive amount, make the dual alkalinity 1.8~2.2 of mixture B；By the mixture B after mixing through cuber
It carries out freezing off molding, briquetting pressure is 10MPa~20MPa, is prepared into carbon-bearing lump；The preparation raw material and matter of the mixture A
Measure number 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, bonding agent 1 part~4
Part, 1 part~4.5 parts of oxygen-making agent.
2. the carbon-bearing lump according to claim 1 for being used to prepare full concentrate sinter mixture, which is characterized in that the smelting
Bronze dirt is that sintering dust separation ash, pelletizing dedusting ash, gas ash are one such or several, and granularity is many less than 200 purposes
In 85%.
3. the carbon-bearing lump according to claim 2 for being used to prepare full concentrate sinter mixture, which is characterized in that the smelting
The mix surface for being sprayed at rolling in the form of gas conveying for metallurgical dust with add mode of bronze dirt, the delivery rate of gas
Control is in 3.5m3/h-8.5m3/h。
4. the carbon-bearing lump according to claim 1 for being used to prepare full concentrate sinter mixture, which is characterized in that described viscous
Connecing agent is one or more of bentonite, waterglass, sodium humate, sodium carboxymethylcellulose and polyacrylamide.
5. the carbon-bearing lump according to claim 1 for being used to prepare full concentrate sinter mixture, which is characterized in that described low
Valence fuel is the collocation of one or more of lignite, anthracite, meager coal, lean coal, semicoke, biomass carbon.
6. the carbon-bearing lump according to claim 1 for being used to prepare full concentrate sinter mixture, which is characterized in that the system
Oxygen agent is one or more of acerdol, calcium manganate, potassium permanganate, and addition manner is by the completely soluble system of oxygen-making agent
Oxygen-making agent solution is obtained, mixture A is added in oxygen-making agent solution in the form of atomized water.
7. the carbon-bearing lump according to claim 1 for being used to prepare full concentrate sinter mixture, which is characterized in that described to contain
A diameter of 8mm~the 12mm of carbon agglomerate, compression strength are greater than 500N.
8. the method for preparing full concentrate sinter mixture using carbon-bearing lump described in claim 1, which is characterized in that be to burn
It ties with addition of carbon-bearing lump in mixture, 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) 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；
According to one, two or three pole in 3 sintering usage factor, sintering solid burnup and sintered ore rotary drum strength indexs
Section where value, obtains the optimum proportioning of carbon-bearing lump in ultimate sinter mixture.
9. the method according to claim 8 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.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114015869A (en) * | 2021-10-27 | 2022-02-08 | 重庆臻焱节能环保科技有限公司 | Cold-pressed ball production process based on sintering return ores |
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| CN110819793A (en) * | 2019-10-28 | 2020-02-21 | 鞍钢股份有限公司 | Thick material layer sintering production method |
| CN110819793B (en) * | 2019-10-28 | 2021-04-02 | 鞍钢股份有限公司 | Thick material layer sintering production method |
| 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 |
| CN114015869A (en) * | 2021-10-27 | 2022-02-08 | 重庆臻焱节能环保科技有限公司 | Cold-pressed ball production process based on sintering return ores |
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