CN108929948A - A kind of iron ore mixing powder dropping sheet, synergy using Sierra Leone coarse powder - Google Patents
A kind of iron ore mixing powder dropping sheet, synergy using Sierra Leone coarse powder Download PDFInfo
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- CN108929948A CN108929948A CN201810832016.7A CN201810832016A CN108929948A CN 108929948 A CN108929948 A CN 108929948A CN 201810832016 A CN201810832016 A CN 201810832016A CN 108929948 A CN108929948 A CN 108929948A
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- 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
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Abstract
The invention discloses a kind of iron ores using Sierra Leone coarse powder drop sheet, synergy to mix powder, it is formed and weight percentage are as follows: Sierra Leone coarse powder: 8~25%, Brazilian card powder: 15~40%, Brazilian coarse powder: 15~30%, Australian FB powder: 15~25%, Mauritanian coarse powder: 8~25%.Sierra Leone coarse powder is successfully applied in Sinter Blending Process by the present invention, and by overcoming the Al of Sierra Leone coarse powder with addition of suitable iron ore2O3The unfavorable factors such as content is high, assimilation temperature is high, liquid phase intensity is low, to guarantee the application effect of Sierra Leone coarse powder.
Description
Technical field
The invention belongs to iron-smelting raw materials to prepare and sintering production technical field, and in particular to a kind of application Sierra Leone coarse powder
Sheet drops, the iron ore of synergy mixes powder.
Background technique
Sierra Leone coarse powder is a kind of typical low high bauxite resource of silicon for originating from the west African state Sierra Leone, sulphur, phosphorus, arsenic,
The particularly detrimental constituent content such as potassium, sodium, lead, zinc, copper is very low, advantageous to blast fumance and subsequent STEELMAKING PRODUCTION.
Sierra Leone ore resources are abundant, cost of winning is low, in addition the price rebate of high aluminium ore is very big, therefore have very prominent
Cost advantage out, there are the case using Sierra Leone coarse powder in Chinese many iron and steel enterprises, but Sierra Leone coarse powder is direct
When applied to sintering production, the negative shadows such as sinter strength reduces, the rate of return mine increases, low temperature reduction degradation index increases can be generated
It rings, influences the indexs such as sintering solid fuel consumption and ironmaking yield, coke ratio, so that it be made to beat greatly in the effect of drop low cost aspect
Discount.
Summary of the invention
It is a kind of mixed using Sierra Leone coarse powder drop sheet, the iron ore of synergy technical problem to be solved by the present invention lies in providing
Even powder, sinter strength caused by solving Sierra Leone coarse powder when being applied to sintering production reduces, the rate of return mine rises high and low temperature also
The problems such as original powder rate increases.
In order to achieve the above objectives, technical scheme is as follows:
The present invention analyzes and researches to the chemical index and sintering basic property of Sierra Leone coarse powder, then by matching adduction
Suitable iron ore overcomes Al in the coarse powder of Sierra Leone2O3Content is high, assimilates the unfavorable factors such as temperature height, liquid phase intensity difference, thus
Guarantee the application effect of Sierra Leone coarse powder.
A kind of iron ore mixing powder dropping sheet, synergy using Sierra Leone coarse powder, composition and weight percentage are as follows: Sai La
Leon coarse powder: 8~25%, Brazilian card powder: 15~40%, Brazilian coarse powder: 15~30%, Australian FB powder: 15~25%, hair
Li Taniya coarse powder: 8~25%.
Further, the iron ore using Sierra Leone coarse powder drop sheet, synergy mixes the composition control range of powder are as follows: TFe:
61~62%, SiO2: 4.5~5.5%, Al2O3: 2~2.5%, S≤0.05%, P≤0.1%, by weight percentage.
Preferably, the iron ore using Sierra Leone coarse powder drop sheet, synergy mixes the composition and weight percentage of powder
Are as follows: Sierra Leone coarse powder: 14%, Brazilian card powder: 27%, Brazilian coarse powder: 23%, Australian FB powder: 22%, Mauritania
Coarse powder: 14%.
Preferably, the iron ore using Sierra Leone coarse powder drop sheet, synergy mixes the composition of powder are as follows: TFe:61.5%,
SiO2: 5.0%, Al2O3: 2.25%, S:0.022%, P:0.059%, by weight percentage.
It is 1250~1280 that iron ore of the present invention using Sierra Leone coarse powder drop sheet, synergy, which mixes the assimilation temperature of powder,
DEG C, igloss amount≤5%.
Again, the iron ore using Sierra Leone coarse powder drop sheet, synergy mixes the chemical index of Sierra Leone coarse powder in powder
It is as follows: TFe:56~60%, SiO2≤ 4%, Al2O3≤ 8%, S≤0.1%, P≤0.1%, by weight percentage.
Iron ore of the present invention using Sierra Leone coarse powder drop sheet, synergy mixes the chemical index of Brazilian card powder in powder such as
Under: TFe:64.5~67.5%, SiO2≤ 2.5%, Al2O3≤ 2.5%, S≤0.05%, P≤0.1%, with weight percent
Meter.
In the present invention, described using Sierra Leone coarse powder drop, originally, in the iron ore of synergy mixing powder the chemistry of Brazilian coarse powder refers to
It marks as follows: TFe:59~63%, SiO2≤ 9%, Al2O3≤ 2.5%, S≤0.05%, P≤0.1%, by weight percentage.
In the present invention, the iron ore using Sierra Leone coarse powder drop sheet, synergy mixes the change of Australia's FB powder in powder
It is as follows to learn index: TFe:57.5~59.5%, SiO2≤ 6.5%, Al2O3≤ 3.0%, S≤0.05%, P≤0.1%, with weight
Percentages.
In the present invention, the iron ore using Sierra Leone coarse powder drop sheet, synergy mixes Mauritanian coarse powder in powder
Chemical index is as follows: TFe:61~64%, SiO2≤ 10%, Al2O3≤ 1.5%, S≤0.1%, P≤0.15%, with weight hundred
Divide than meter.
The present invention passes through reasonably combined and Sai Lali in network analysis, the sintering metallurgical performance of research Sierra Leone coarse powder
The iron ore of high coarse powder Performance Match, controls Al2O3Content solves it and assimilates that temperature is high, liquid phase intensity is low during the sintering process
Problem finally overcomes negative effect of Sierra Leone coarse powder to sinter quality, meets the need of ironmaking production drop sheet, synergy
It asks.
Specifically, the present invention is the chemical index and sintering character for analyzing Sierra Leone coarse powder first, it is studied to burning
The underlying causes that knot mineral amount has a negative impact, then selection can form complementary iron ore therewith and arrange in pairs or groups, thus
The defect for eliminating its chemical index and metallurgical performance plays the advantage of its low silicon, low price, reduces ironmaking cost.
Present invention research show that the typical composition of various Iron Ore Powders and metallurgical performance metrics evaluation are as shown in table 1.
Table 1
As shown in Table 1, two kinds of Brazilian mine liquid phase intensity with higher of Brazilian card powder and Brazilian coarse powder, can make up Sai La
The low problem of Leon coarse powder liquid phase intensity, Australian FB powder have lower assimilation temperature and good Liquid phase flowability, can
To overcome the problems, such as that Sierra Leone mine and Brazilian coarse powder assimilation temperature drift, Liquid phase flowability are poor, Mauritanian coarse powder tool
Have the characteristics of high-grade, low aluminium, high silicon, can effectively liquidate Sierra Leone coarse powder high alumina the shortcomings that, guarantee that iron ore of the present invention mixes
The SiO of even powder2And Al2O3Content is moderate, guarantees that mixing powder has excellent comprehensive performance, detailed analysis is as follows:
(1) two kinds of raw materials of Brazilian card powder and Brazilian coarse powder are added in present invention selection, and it is low to solve Sierra Leone mine liquid phase intensity
The problem of, but there is also the unfavorable factors such as assimilation temperature height, Liquid phase flowability difference for Brazilian coarse powder, it is also necessary in conjunction with other raw materials
The performance of (such as Australia's FB powder) is adjusted, and proportion is also unsuitable excessively high, and therefore, iron ore of the present invention mixes to be controlled in powder formula
Brazilian card powder content is made in 15~40% ranges, Brazilian coarse powder content is in 15~30% ranges.
(2) present invention selection addition Australia's FB powder, for solving Sierra Leone coarse powder assimilation temperature height and Brazilian mine
The problem of Liquid phase flowability difference guarantees that gained iron ore mixes powder assimilation temperature and is not higher than 1280 DEG C, but simultaneously also not preferably less than
1250 DEG C, assimilation temperature is excessively high to be unfavorable for liquid phase generation, and liquid phase is very few to will cause rate of return mine raising, strength reduction；Assimilate temperature
The too low liquid phase that will lead to is excessively abundant, causes sinter macropore thin-walled, and strength reduction, reproducibility is caused to be deteriorated.Therefore, of the invention
Iron ore, which mixes, controls Australia's FB powder content in 15~25% ranges in powder formula.
(3) the characteristics of main purpose of Mauritanian coarse powder is using its low aluminium, high silicon, is added in present invention selection, liquidates
The characteristics of Sierra Leone powder high alumina, low silicon, allow Al in the mixing powder containing Sierra Leone coarse powder2O3And SiO2Content be maintained at
It is suitble in the range of sintering production, while the two ratio is allowed to be maintained at 0.45 or so, this ratio is more advantageous during the sintering process
In the formation for promoting compound calcium ferrite, compound calcium ferrite be produce the intensity highest generated in high basicity sinter production process,
Reproducibility is best, the highest liquid phase of bond strength, Al2O3It is unfavorable for the formation of compound calcium ferrite, but Al when content is too low2O3It crosses
Gao Shihui causes Liquid phase flowability poor, causes sinter strength to reduce, low temperature reduction degradation index increases, it is therefore desirable to which control is one
A suitable range (2~2.5%).Therefore, iron ore of the present invention mix controlled in powder formula Mauritanian coarse powder content 8~
In 25% range.
(4) ratio of the invention by adjusting Brazilian card powder, Brazilian coarse powder, Australia's FB powder, Mauritanian coarse powder,
Make SiO in the mixing powder with addition of Sierra Leone coarse powder2Content controls the SiO between 4.5~5.5%2The control of content be for
When being sintered large scale or all being produced using present invention mixing powder, it can guarantee basic sintering character.Practice card
It is bright, the SiO of sinter2Content controls between 4.5~5.5%, is conducive to produce good sintering mineral products, for the bed of material
Large-type sinterer thick, air leak rate of air curtain is low, SiO2Content can be lower, the small sintering machine thin for the bed of material, air leak rate of air curtain is high, SiO2
Content needs are higher, can suitably be adjusted.
The present invention is by above-mentioned 4 aspects selection and collocation raw material, and in Sierra Leone, the proportion of coarse powder is in a certain range
When interior (8~25%), it can effectively overcome Sierra Leone coarse powder assimilation temperature is high, liquid phase intensity is low and Al2O3Content height etc. lacks
It falls into, sinter is made to guarantee the quality requirements such as high-intensitive, the low rate of return mine and lower low temperature reduction degradation index.
The indexs such as the chemical index of various raw materials, sintering basic property, are allotting suitable compositions in present invention combination table 2
While blending ore, to the progress priority control such as assimilation temperature, liquid phase intensity, iron ore ingredient provided by the invention of arranging in pairs or groups out,
To obtain the performance indicator of optimal blending ore.
Powder is mixed to iron ore of the present invention, is sintered with addition of solid fuel appropriate, calcium lime powder, dolomite dust
Production, obtained sinter composition are as follows: TFe:56.6~54.9%, FeO:7~9%, SiO2: 4.9~5.8%, CaO:9.2~
10.1%, MgO:2.7~3.0%, Al2O3: 2.1~2.5%, basicity R:1.75~1.85.Industry experience proves, sinter
Basicity R (R=CaO/SiO2) in 1.75~1.85 ranges, the SiO of sinter2Content completes symbol in 4.9~5.8% ranges
Sinter quality requirement is closed, especially, SiO in sinter after iron ore mixing powder sintering of the present invention2Content is 4.9~5.8%,
SiO2The too low production quantity that will affect liquid phase of content, causes that sinter strength is low, low temperature reduction degradation index is high, SiO2Too high levels
The nature of glass can be caused to increase, cause sinter strength to reduce, reproducibility reduces.Meanwhile enterprise is that the bed of material is thick, air leak rate of air curtain is low is big
When producing sinter on type sintering machine, the sinter of the low silicon of production high-grade-can be selected, on the contrary it is then select to produce it is more low-grade-
The sinter of high silicon, TFe, SiO in above-mentioned sinter composition2Content range can cover enterprise to the low silicon of high-grade-, low product completely
Position-high silicon production requirement.As it can be seen that above-mentioned sinter can meet requirement of the most enterprises to sinter quality.
Blast furnace smelting is carried out with 15% lump ore (TFe63%) and 10% pellet (TFe62%) using above-mentioned sinter
Refining, gained index are as follows: enter furnace mine grade: 56.8~58.1%, 490~515kg/t of fuel ratio, clinker Al2O3: 16~16.5%,
Clinker MgO:10~11%, R2:1.15~1.2.The Al of blast-furnace slag in the present invention2O3Content control is being no more than 17%, magnalium
Than control 0.6~0.7,1.15~1.2, this is the structure an of low consumption, low cost for dual alkalinity control.Meanwhile it is high
Entering furnace mine grade in furnace index can reach 56.8~58.1%, because this enters furnace mine grade and the grade of sinter is closely related,
Entering furnace mine grade within the above range can control grade of sinter in OK range, and then by SiO in sinter2Content exists
In 4.9~5.8% ranges, exceedingly increases or decreases grade of sinter and be bound to cause sinter SiO2Beyond its reasonable control
Range influences sinter quality, and then impacts to blast fumance.As it can be seen that the blast furnace index of above range meet at present it is more
The requirement of number iron and steel enterprise.
Therefore, iron ore of the present invention mixes powder and meets current most enterprises to sinter composition and blast furnace index
Control requires, and all can mix powder using iron ore of the present invention completely and be sintered production, and apply all to blast furnace
It smelts.
The present invention enables the index for mixing powder to reach the index for producing High-quality Sinters by accurately design,
After the completion of design, compounding, mixing production is carried out using intelligentized mixing material process equipment, lifting plug of the present invention is obtained and draws
The iron ore ingredient of Leon coarse powder application effect.
Beneficial effects of the present invention:
Sierra Leone coarse powder of high alumina, low silicon, low price is successfully applied in Sinter Blending Process by the present invention, is passed through simultaneously
Brazilian mine (15~40% Brazilian coarse powder of Brazilian card powder+15~30%) is added, overcomes Sierra Leone coarse powder liquid phase intensity is low to ask
Topic；By the Australian FB powder of addition 15~25%, overcome the problems, such as that Sierra Leone coarse powder assimilation temperature is high；Pass through addition 8
~25% Mauritanian coarse powder, liquidate Sierra Leone coarse powder high alumina, low silicon the characteristics of, keep suitable alumina silica ratio, ensure that
The generation of compound calcium ferrite, so that the performance deficiency of Sierra Leone coarse powder is overcome comprehensively, so that sintering composition, the base of blending ore
Plinth performance and sintering character are ensured.Simultaneously as the present invention effectively applies the low price resource such as Sierra Leone coarse powder,
But also ironmaking cost has significant reduction.
Specific embodiment
Below with reference to embodiment, the present invention will be further described.
The iron ore of 1-5 of the embodiment of the present invention mixes powder composition and weight percentage is as shown in table 2, and iron ore mixes powder formula
In various iron ores chemical index representative value it is as shown in table 3, various iron ores are used intelligentized mixing material process equipment to carry out
Compounding, mixing production obtains iron ore of the invention and mixes powder.
It is as shown in table 4 that iron ore obtained by embodiment 1-5 mixes each chemical element, compound, the chemical index of granularity in powder.
The sinter composition for mixing powder production being formulated using embodiment 1-5 is as shown in table 5, and blast furnace is matching 15% lump ore
(TFe63%) and 10% pellet (TFe62%), index is as shown in table 6 after smelting.
The mixing powder product that the present invention produces, the mainstream mine of can effectively replace Brazil and Australia in enterprise's application
Product reaches the target of High-quality Sinters while cost reduces.Table 7 is the application example of Hebei Wuan enterprise, sintering
Mine index situation comparing result is as shown in table 8.
As shown in Table 8, it is compared by pilot production, enterprise is using the present invention with addition of five kinds of mixing powder of Sierra Leone coarse powder
Other iron powders of substitution 30% or so are sintered production respectively, the sinter with addition of the production of Sierra Leone coarse powder more independent than enterprise
Three drum strength, the rate of return mine, cryogenic reducting powder index indexs all it is superior very much.By comparative example 2 and embodiment 1-5 it is found that
Although enterprise is after directly applying Sierra Leone coarse powder, sinter and pig iron cost have certain reduction, due to the rate of return mine
High, sintering solid fuel consumption height and the reduction of iron yield, blast furnace fuel consumption as caused by low temperature reduction degradation index raising
The factor of high aspect, the reduction amplitude very little of final iron cost, and after using mixing powder of the invention, sintered ore rotary drum strength
Increase, the rate of return mine reduces, cryogenic reducting powder index maintains an equal level with former scheme substantially, and iron cost reduces amplitude up to 8 yuan/t or more,
Sierra Leone coarse powder has sufficiently been shown in sintering, the drop sheet in terms of ironmaking, synergistic effect.
2 unit of table: weight percent, %
Table 3
Table 4
5 unit of table: mass percent, %
Table 6
7 unit of table: weight percent, %
Table 8
Claims (10)
1. a kind of iron ore using Sierra Leone coarse powder drop sheet, synergy mixes powder, composition and weight percentage are as follows: Sai Lali
High coarse powder: 8~25%, Brazilian card powder: 15~40%, Brazilian coarse powder: 15~30%, Australian FB powder: 15~25%, Mao Li
Ta Niya coarse powder: 8~25%.
2. the iron ore according to claim 1 using Sierra Leone coarse powder drop sheet, synergy mixes powder, which is characterized in that institute
It states and mixes the composition and weight percentage of powder using the iron ore of Sierra Leone coarse powder drop sheet, synergy are as follows: Sierra Leone coarse powder:
14%, Brazilian card powder: 27%, Brazilian coarse powder: 23%, Australian FB powder: 22%, Mauritanian coarse powder: 14%.
3. the iron ore according to claim 1 using Sierra Leone coarse powder drop sheet, synergy mixes powder, which is characterized in that institute
It states and mixes the compositional ranges of powder using the iron ore of Sierra Leone coarse powder drop sheet, synergy are as follows: TFe:61~62%, SiO2: 4.5~
5.5%, Al2O3: 2~2.5%, S≤0.05%, P≤0.1%, by weight percentage.
4. the iron ore according to claim 2 using Sierra Leone coarse powder drop sheet, synergy mixes powder, which is characterized in that institute
It states and mixes the composition of powder using the iron ore of Sierra Leone coarse powder drop sheet, synergy are as follows: TFe:61.5%, SiO2: 5.0%, Al2O3:
2.25%, S:0.022%, P:0.059%, by weight percentage.
5. the iron ore according to claim 1-4 using Sierra Leone coarse powder drop sheet, synergy mixes powder, feature
It is, it is 1250~1280 DEG C that the iron ore using Sierra Leone coarse powder drop sheet, synergy, which mixes the assimilation temperature of powder, igloss amount
≤ 5%.
6. the iron ore according to claim 1 or 2 using Sierra Leone coarse powder drop sheet, synergy mixes powder, which is characterized in that
The iron ore using Sierra Leone coarse powder drop sheet, synergy mixes the chemical index of Sierra Leone coarse powder in powder are as follows: and TFe:56~
60%, SiO2≤ 4%, Al2O3≤ 8%, S≤0.1%, P≤0.1%, by weight percentage.
7. the iron ore according to claim 1 or 2 using Sierra Leone coarse powder drop sheet, synergy mixes powder, which is characterized in that
The iron ore using Sierra Leone coarse powder drop sheet, synergy mixes the chemical index of Brazilian card powder in powder are as follows: and TFe:64.5~
67.5%, SiO2≤ 2.5%, Al2O3≤ 2.5%, S≤0.05%, P≤0.1%, by weight percentage.
8. the iron ore according to claim 1 or 2 using Sierra Leone coarse powder drop sheet, synergy mixes powder, which is characterized in that
The iron ore using Sierra Leone coarse powder drop sheet, synergy mixes the chemical index of Brazilian coarse powder in powder are as follows: TFe:59~63%,
SiO2≤ 9%, Al2O3≤ 2.5%, S≤0.05%, P≤0.1%, by weight percentage.
9. the iron ore according to claim 1 or 2 using Sierra Leone coarse powder drop sheet, synergy mixes powder, which is characterized in that
The iron ore using Sierra Leone coarse powder drop sheet, synergy mixes the chemical index of Australia's FB powder in powder are as follows: TFe:57.5
~59.5%, SiO2≤ 6.5%, Al2O3≤ 3.0%, S≤0.05%, P≤0.1%, by weight percentage.
10. the iron ore according to claim 1 or 2 using Sierra Leone coarse powder drop sheet, synergy mixes powder, feature exists
In the iron ore using Sierra Leone coarse powder drop sheet, synergy mixes the chemical index of Mauritanian coarse powder in powder are as follows: TFe:
61~64%, SiO2≤ 10%, Al2O3≤ 1.5%, S≤0.1%, P≤0.15%, by weight percentage.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109371229A (en) * | 2018-12-05 | 2019-02-22 | 江苏永钢集团有限公司 | The production technology of sinter |
| CN109652642A (en) * | 2018-12-05 | 2019-04-19 | 江苏永钢集团有限公司 | Solid fuel can be reduced and improve the sintering ore production technology of grade of sinter |
| CN110066896A (en) * | 2019-04-28 | 2019-07-30 | 山东钢铁集团有限公司 | A kind of blast furnace is with addition of high alumina Sierra Leone mining and metallurgy smelting method |
| CN111020179A (en) * | 2019-12-25 | 2020-04-17 | 天津天钢联合特钢有限公司 | Sintered ore with uniform particle size and production method thereof |
| CN114703364A (en) * | 2022-04-28 | 2022-07-05 | 山东莱钢永锋钢铁有限公司 | Method for producing sintered ore by high-proportion blending of FB powder |
| CN115094233A (en) * | 2022-05-26 | 2022-09-23 | 抚顺新钢铁有限责任公司 | Method for efficiently utilizing full-size grade of iron selamestron |
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| CN106244798A (en) * | 2016-08-22 | 2016-12-21 | 山东钢铁股份有限公司 | A kind of method utilizing sintering process Treatment of Wastewater in Coking |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109371229A (en) * | 2018-12-05 | 2019-02-22 | 江苏永钢集团有限公司 | The production technology of sinter |
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| CN110066896A (en) * | 2019-04-28 | 2019-07-30 | 山东钢铁集团有限公司 | A kind of blast furnace is with addition of high alumina Sierra Leone mining and metallurgy smelting method |
| CN111020179A (en) * | 2019-12-25 | 2020-04-17 | 天津天钢联合特钢有限公司 | Sintered ore with uniform particle size and production method thereof |
| CN114703364A (en) * | 2022-04-28 | 2022-07-05 | 山东莱钢永锋钢铁有限公司 | Method for producing sintered ore by high-proportion blending of FB powder |
| CN114703364B (en) * | 2022-04-28 | 2024-01-26 | 山东莱钢永锋钢铁有限公司 | Method for producing sinter by high-proportion FB powder |
| CN115094233A (en) * | 2022-05-26 | 2022-09-23 | 抚顺新钢铁有限责任公司 | Method for efficiently utilizing full-size grade of iron selamestron |
| CN115094233B (en) * | 2022-05-26 | 2023-12-15 | 抚顺新钢铁有限责任公司 | Method for full-grain-level efficient utilization of sorafenib |
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Application publication date: 20181204 |