CN104419823A - Ingredient of iron-bearing material of agglomerate - Google Patents
Ingredient of iron-bearing material of agglomerate Download PDFInfo
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- CN104419823A CN104419823A CN201310390489.3A CN201310390489A CN104419823A CN 104419823 A CN104419823 A CN 104419823A CN 201310390489 A CN201310390489 A CN 201310390489A CN 104419823 A CN104419823 A CN 104419823A
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- iron
- agglomerate
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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 provides an ingredient of an iron-bearing material of agglomerate. The ingredient comprises the following components in percentage by weight: 36%-70% of alkaline fine iron ore concentrate, 0-51% of acid iron ore powder and 13%-30% of high-silicon powder. The ingredient of the iron-bearing material of the agglomerate is a frame basis utilizing high-grade alkaline fine iron ore concentrate and cheap low-grade high-silicon powder as sintering raw materials, and a part of common acid iron ore powder is added, so that the grade and the strength of the agglomerate are ensured, the requirements of a blast furnace are met by the agglomerate, and the production cost of ironmaking is reduced.
Description
Technical field
The present invention relates to field of steel production, in particular to a kind of batching of agglomerate iron-bearing material.
Background technology
Powdered iron ore price increase 71.5% in 2005, within 2006, go up 19%, within 2007, go up and go up 96.5%, powdered iron ore price continuous rise in 9.5%, 2008, and the rise of coke price, making the cost of the pig iron continue to rise, in order to control the production cost of smelting iron, suitable powdered iron ore need be selected, by rational proportion, reduce production cost.
In prior art, the SINTERING PRODUCTION technique of ironmaking is: by rich ore powder, fine ore, sinter return fine, BF return fines, breeze and solvent (calcium lime powder, ground dolomite), prepare burden according to a certain percentage, through mixing machine mixing also pelletizing, compound is taped against igniting sintering on sintering pallet through distributor, the agglomerate burnt till is after crusher in crushing screening, on sieve, finished product agglomerate is sent to blast furnace, screen underflow is for returning mine, return mine and allocate compound into and again sinter, the waste gas that sintering process produces, after fly-ash separator dedusting, by blower fan suction chimney, enters air.
Therefore, select suitable powdered iron ore to sinter, reducing the cost of ironmaking, is the problem that those skilled in the art need solution badly.
Summary of the invention
In order to reduce the production cost of ironmaking, the invention provides a kind of batching of agglomerate iron-bearing material, both having ensure that the quality of agglomerate, again reducing the production cost of ironmaking.
In view of this, the invention provides a kind of batching of agglomerate iron-bearing material, comprise by weight percentage: the rich powder 13% ~ 30% of basic iron fine powder 36% ~ 70%, acid powdered iron ore 0 ~ 51%, high silicon.
The batching of agglomerate iron-bearing material provided by the invention, utilize the frame foundation that higher-grade basic iron fine powder is raw materials for sintering with the rich powder of cheap low-grade high silicon, with addition of part general acidic powdered iron ore, both ensure that the quality of agglomerate, again reduce the production cost of ironmaking.The use of the rich powder of high silicon in ironmaking, serves the effect reducing production cost, has expanded raw material mix and the kind of sintering simultaneously.
Embodiment
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with embodiment, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
The invention provides a kind of batching of agglomerate iron-bearing material, comprise by weight percentage: the rich powder 13% ~ 30% of basic iron fine powder 36% ~ 70%, acid powdered iron ore 0 ~ 51%, high silicon.
The raw materials for sintering of agglomerate comprises iron material, flux and fuel, iron-bearing material refers to powdered iron ore, Iron concentrate and other surrogates (or industrial waste), flux is calcium lime powder, ground dolomite, limestone powder, slaked lime powder etc. mainly, and fuel is breeze, hard coal etc. mainly.
The batching of agglomerate iron-bearing material provided by the invention, higher-grade basic iron fine powder is utilized to form the frame foundation of raw materials for sintering with the rich powder of cheap low-grade high silicon, with addition of part general acidic powdered iron ore, both ensure that the quality of agglomerate, again reduce the production cost of ironmaking.The use of the rich powder of high silicon in ironmaking, serves the effect reducing production cost, has expanded structure and the kind of raw materials for sintering simultaneously.
Wherein, the rich powder of low-grade high silicon refers to that iron level is lower, and scope is 50.00% ~ 53.00%, SiO
2content is 10.00% ~ 18%, the rich powder of low-grade high silicon mainly domestic breeze; Fine powder be exploitation iron ore through broken, grind after again through the powdered iron ore that ore dressing obtains, its granularity very carefully, is called fine powder; Breeze (also claiming rich powder) is that the iron ore of exploitation screens after fragmentation, and what block was large directly can supply blast furnace feeding, is called rawore, lump ore, natural lump ore, and remaining fritter and powder, for sintering, are called breeze or rich powder; Basic iron breeze or basic iron fine powder refer to that CaO and the MgO sum in raw material is greater than SiO
2breeze or fine powder, common mainly fine powder.
Wherein, the rich powder of high silicon comprises treasure woods breeze, yellow plum breeze, the long-term high sila breeze overstock, and the chemical composition of three is as shown in table 1.
Table 1
The feature of treasure woods breeze, yellow plum breeze: Iron grade lower (about 50%), SiO
2content is high, moisture higher (mostly more than 10%), middle high scaling loss (about 4%).The rich powder of high silicon is allocated in raw materials for sintering, regulates the SiO of compound
2content, ensures the growing amount of liquid phase in sintering production process, has enough liquid phases, just make the intensity of agglomerate high, meet the Production requirement of blast furnace in sintering process.
Further, in the batching of described agglomerate iron-bearing material, comprise by weight percentage: the rich powder 13% ~ 18% of basic iron fine powder 36% ~ 46%, acid powdered iron ore 36% ~ 51%, high silicon.
Wherein, contain in the rich powder of high silicon: Fe:52.00%, SiO
2: 13.00%, CaO:1.00%, MgO:1.40%, Al
2o
3: 1.00%, S:0.50%, P:0.103%.
Described basic iron fine powder comprises South Africa fine powder.
The main chemical compositions of South Africa fine powder and massfraction are: Fe:65.10%, SiO
2: 1.42%, CaO:1.70%, MgO:2.75%, Al
2o
3: 0.50%, S:0.08%, P:0.050%.
Preferably, described basic iron fine powder comprises Manzhouli fine powder.
The main chemical compositions of Manzhouli fine powder and massfraction are: Fe:63.00%, SiO
2: 2.50%, CaO:2.1%, MgO:3.00%.
Preferably, described acid powdered iron ore comprises Brazilian breeze.
Main chemical compositions and the massfraction of Brazil's breeze are: Fe:64.35%, SiO
2: 4.63%, CaO:0.20%, MgO:0.28%.
Preferably, described acid powdered iron ore comprises Australian breeze.
The main chemical compositions that Australian iron ore divides and massfraction are: Fe:58.70%, SiO
2: 4.88%, CaO:0.49%, MgO:0.45%.
Preferably, described acid powdered iron ore comprises and spreads out river breeze.
Main chemical compositions and the massfraction of spreading out river breeze are: Fe:56.90%, SiO
2: 6.54%, CaO:0.40%, MgO:0.47%.
Preferably, described acid powdered iron ore comprises Indian high-grade iron ore.
The main chemical compositions of Indian high-grade iron ore and massfraction are: Fe:61.54%, SiO
2: 4.78%, CaO:0.36%, MgO:0.55%, Al
2o
3: 3.30%, S:0.02%, P:0.058%.
The batching of agglomerate iron-bearing material provided by the present invention is further illustrated below by specific embodiment:
Embodiment 1:
A batching for agglomerate iron-bearing material, comprises by weight percentage: South Africa fine powder 46%, Indian high-grade iron ore 36%, the rich powder 18% of high silicon.
In the batching of this agglomerate iron-bearing material, containing higher CaO and MgO in the fine powder of South Africa, the amount of allocating into of calcium lime powder (main component CaO) and ground dolomite (main component CaO and MgO) can be reduced in sintered material; The rich powder of high silicon utilizes the resource of its cheapness, and reduce smelting cost, it contains higher SiO
2, SiO in adjustable agglomerate in batching
2content, the generally SiO of agglomerate
2content controls 4.00% ~ 6.00%; Setting up with on the South Africa fine powder+basis of high silicon richness powder for raw materials for sintering structural framing, also need supplement with addition of other raw materials, as the Indian high-grade iron ore in the present embodiment, make the amount of allocating into of iron material reach the 10Kg(amount of allocating into 10Kg and refer to that the iron material of process on every 0.5 meter of belt per second is 10Kg).
Below by cost analysis, further illustrate the batching ironmaking of the agglomerate iron-bearing material using the present embodiment to provide, the cost of ironmaking can be reduced.Table 2 is the cost analysis table that the Brazilian breeze of current common use obtains agglomerate and ironmaking; Table 3 obtains the cost analysis table of agglomerate for the batching that provides with the present embodiment, and table 4 is the cost analysis table of smelting iron with the agglomerate of table 3.
Table 2
Table 3
Table 4
In table 2 to table 4, R2 is CaO and SiO
2mass ratio.
As shown in Table 4, the cost generating ton iron by the batching of the agglomerate iron-bearing material of the present embodiment is about 4300 yuan, the cost 4540 yuan of ton iron is generated with Brazilian breeze single fire, the cost producing ton iron by the batching of the present embodiment reduces about 240 yuan, can draw thus, with batching ironmaking provided by the invention, production cost can be reduced.Set Steel Plant and within 1 year, can generate 1.5 ten thousand tons of pig iron, so, the batching provided with the present embodiment, can reduce production cost about 3,600,000 yuan.
Sinter by above-mentioned batching, the quality index of its agglomerate is: grade of sinter: 56.50 ± 1.00%(agglomerate national grade ii standard requires), SiO
2: 5.00 ± 0.50%, barrate strength is 73.5% ~ 75%, reaches the requirement (GB High-quality Sinters requires barrate strength>=72.00%) of national High-quality Sinters.In the ratio range of basic iron fine powder 36% ~ 46%, acid powdered iron ore 51% ~ 36%, the rich powder 13% ~ 18% of high silicon, in the batching that the present embodiment provides, South Africa fine powder uses more, and the rich powder of high silicon uses also more, so production cost is lower.
When ore price is in a high position, draw from the cost-efficiency analysis of various raw material, combined according to the above ratio by the rich powder of South Africa fine powder, Indian high-grade iron ore and high silicon, production cost is lower, and sinter quality meets blast furnace feeding requirement.
Embodiment 2:
A batching for agglomerate iron-bearing material, comprises by weight percentage: South Africa fine powder 47%, spreads out river breeze 36%, the rich powder 17% of high silicon, after said ratio sintering, the quality index of agglomerate is: grade of sinter: 56.50 ± 1.00%(agglomerate national grade ii standard requires), SiO
2: 5.50 ± 0.50%, barrate strength is 73%, reaches the requirement of national High-quality Sinters.
Embodiment 3:
A kind of batching of agglomerate iron-bearing material, comprise by weight percentage: South Africa fine powder 36%, the rich powder 30% of high silicon, Brazilian breeze 34%, by said ratio composition iron-bearing material, add flux and fuel sinters, agglomerate meets blast furnace feeding requirement, and cost reduces, but compared with embodiment 1, the intensity of the present embodiment slightly declines but still meets the demands, and cost increases than embodiment 1.
Embodiment 4:
A kind of batching of agglomerate iron-bearing material, comprise by weight percentage: South Africa fine powder 40%, the rich powder 15% of high silicon, Australia's breeze 45%, by said ratio composition iron-bearing material, add flux and fuel sinters, sinter strength also can meet the demands, but cost comparatively embodiment 1 slightly increase.
Embodiment 5:
A kind of batching of agglomerate iron-bearing material, comprise by weight percentage: South Africa fine powder 70%, the rich powder 13% of high silicon, spread out river breeze 17%, by said ratio composition iron-bearing material, add flux and fuel sinters, sinter strength can meet the demands, but cost comparatively embodiment 1 equally slightly increase.
Embodiment 6:
A batching for agglomerate iron-bearing material, comprises by weight percentage: South Africa fine powder 70%, the rich powder 30% of high silicon, and by said ratio composition iron-bearing material, add flux and fuel sinters, sinter quality meets blast furnace feeding requirement, and cost is lower.
In sum, by the batching of agglomerate iron-bearing material of the present invention, both ensure that the quality of agglomerate, and the intensity of agglomerate had been met the demands, again reduces the production cost of ironmaking.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a batching for agglomerate iron-bearing material, is characterized in that, comprises by weight percentage: the rich powder 13% ~ 30% of basic iron fine powder 36% ~ 70%, acid powdered iron ore 0 ~ 51%, high silicon.
2. the batching of agglomerate iron-bearing material according to claim 1, is characterized in that, comprise by weight percentage: the rich powder 13% ~ 18% of basic iron fine powder 36% ~ 46%, acid powdered iron ore 36% ~ 51%, high silicon.
3. the batching of agglomerate iron-bearing material according to claim 1, is characterized in that, described basic iron fine powder comprises South Africa fine powder.
4. the batching of agglomerate iron-bearing material according to claim 1, is characterized in that, described basic iron fine powder comprises Manzhouli fine powder.
5. the batching of agglomerate iron-bearing material according to claim 1, is characterized in that, described acid powdered iron ore comprises Brazilian breeze.
6. the batching of agglomerate iron-bearing material according to claim 1, is characterized in that, described acid powdered iron ore comprises Australian breeze.
7. the batching of agglomerate iron-bearing material according to claim 3, is characterized in that, described acid powdered iron ore comprises spreads out river breeze.
8. the batching of agglomerate iron-bearing material according to claim 3, is characterized in that, described acid powdered iron ore comprises Indian high-grade iron ore.
9. the batching of agglomerate iron-bearing material according to claim 7, is characterized in that, comprise by weight percentage: South Africa fine powder 47%, spread out river breeze 36%, the rich powder 17% of high silicon.
10. the batching of agglomerate iron-bearing material according to claim 8, is characterized in that, comprise by weight percentage: South Africa fine powder 46%, Indian high-grade iron ore 36%, the rich powder 18% of high silicon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310390489.3A CN104419823A (en) | 2013-08-30 | 2013-08-30 | Ingredient of iron-bearing material of agglomerate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310390489.3A CN104419823A (en) | 2013-08-30 | 2013-08-30 | Ingredient of iron-bearing material of agglomerate |
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| Publication Number | Publication Date |
|---|---|
| CN104419823A true CN104419823A (en) | 2015-03-18 |
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|---|---|---|---|
| CN201310390489.3A Pending CN104419823A (en) | 2013-08-30 | 2013-08-30 | Ingredient of iron-bearing material of agglomerate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108929949A (en) * | 2018-07-26 | 2018-12-04 | 上海慧安科技股份有限公司 | It is a kind of using the broken drop of pelletizing this, the iron ore of synergy mix powder |
| CN108950190A (en) * | 2018-07-26 | 2018-12-07 | 上海慧安科技股份有限公司 | A kind of iron ore mixing powder dropping sheet, synergy using reduced iron powder |
| CN115491488A (en) * | 2022-09-21 | 2022-12-20 | 宝武集团鄂城钢铁有限公司 | Iron-containing material for sintering with low usage amount of Brazilian mixed powder, sintering composition, sintered ore and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713022A (en) * | 2009-12-16 | 2010-05-26 | 北京中电华方科技有限公司 | Ore proportioning and sintering method |
-
2013
- 2013-08-30 CN CN201310390489.3A patent/CN104419823A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713022A (en) * | 2009-12-16 | 2010-05-26 | 北京中电华方科技有限公司 | Ore proportioning and sintering method |
Non-Patent Citations (1)
| Title |
|---|
| 梁中渝 等: "优化烧结配料分析", 《钢铁》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108929949A (en) * | 2018-07-26 | 2018-12-04 | 上海慧安科技股份有限公司 | It is a kind of using the broken drop of pelletizing this, the iron ore of synergy mix powder |
| CN108950190A (en) * | 2018-07-26 | 2018-12-07 | 上海慧安科技股份有限公司 | A kind of iron ore mixing powder dropping sheet, synergy using reduced iron powder |
| CN115491488A (en) * | 2022-09-21 | 2022-12-20 | 宝武集团鄂城钢铁有限公司 | Iron-containing material for sintering with low usage amount of Brazilian mixed powder, sintering composition, sintered ore and preparation method thereof |
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Application publication date: 20150318 |
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