CN101921910A - Pellet prepared from high-phosphorus iron ore - Google Patents
Pellet prepared from high-phosphorus iron ore Download PDFInfo
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- CN101921910A CN101921910A CN 201010275087 CN201010275087A CN101921910A CN 101921910 A CN101921910 A CN 101921910A CN 201010275087 CN201010275087 CN 201010275087 CN 201010275087 A CN201010275087 A CN 201010275087A CN 101921910 A CN101921910 A CN 101921910A
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Abstract
The invention relates to a pellet prepared from a high-phosphorus iron ore for ironmaking, which comprises the following components in parts by weight: 80-95 parts of iron ore powder of which the phosphorus content is no more than 0.2%, 1-20 parts of high-phosphorus iron ore powder of which the phosphorus content is no less than 0.2%, 1-5 parts of magnesium oxide powder, 0.1-5 parts of bentonite powder or 3.01-5.5 parts of adhesive prepared by mixing 3-5 parts of iron ore powder of which the phosphorus content is no more than 0.2% and 0.01-1 part of acrylic based emulsion powder, wherein the particle size of each component is no more than 0.074mm. By using the production process of oxidized pellets, some high-phosphorus iron ores are added to the iron ore powder of which the phosphorus content is no more than 0.2%, the phosphorus in the iron ores are transformed into semi-metalized pellet binding phases by adding the magnesium oxide under the oxidative atmosphere, and the phosphorus can easily enter dregs in the blast-furnace smelting process. Under the condition of the shortage of iron ore resources at present, the comprehensive utilization of high-phosphorus ore resources is significant for lowering the cost of iron.
Description
Technical field
The present invention relates to ironmaking and use pelletizing, especially belong to pelletizing with the high-phosphorus iron ore preparation.
Background technology
Present raw materials used agglomerate, lump ore and the pelletizing of being mainly of blast furnace, because domestic iron ore resource anxiety, external ore price is surging, ironmaking cost increases.The high-phosphorus iron ore resource that domestic existence is a large amount of, but the technology of dephosphorization treatment high-phosphorus iron ore still is in laboratory stage at present, does not have the report of suitability for industrialized production, therefore is necessary to develop new comprehensive utilization high-phosphorus iron ore technology, reduces production costs.
Guizhou centralab of geology and minerals bureau once reported the report with the chemical method dephosphorization, and iron ore per ton adopts the dephosphorization treatment agent of 65kg, and TFe reaches 56.76% in the iron ore concentrate after the processing, and P drops to 0.15%, is lower than the index of national standard 0.2%.At present, the reserves of high-phosphor oolitic hematite reach hundred million tons of hundreds ofs, and grade contains P more than 0.5% generally 45%; Mei Shan Iron And Steel Company high-phosphor oolitic hematite as the Baosteel subordinate contains P 0.4%.2007, the direct use of Australian Rio Tinto PLC's report melting and reducing technology can remove the phosphorus in the ore easily, but large-scale application is not confirmed.High-phosphorus iron ore is smelted the key issue that exists 3 points: the one, and dephosphorization should be under oxidizing atmosphere, phosphorus just enters in the slag easily; It two is to smelt down for reducing atmosphere in the blast furnace, therefore has no idea to finish dephosphorization and operates; Its three, if aluminum oxide height in the furnace charge must improve basicity with magnesium oxide, the harm that reduces the high-alumina slag guarantees direct motion, the stable and high yields of blast furnace.Therefore comprehensive utilization solves the problem that high-phosphorus iron ore is smelted, can utilize the production method of acid pellet, utilize the high-phosphorus iron ore, the introducing magnesium oxide that add part phosphorus content 〉=0.2%, make the phosphorus in the iron ore in pelletizing oxidation sintering process, enter in the combination mutually, pelletizing is in blast-furnace smelting, and the fusion of semi-metal iron enters molten iron, and in conjunction with entering slag mutually, thereby increased the utilising efficiency of high-phosphorus iron ore, be beneficial to and reduce the ironmaking production cost.
Summary of the invention
The objective of the invention is to overcome high-phosphorus iron ore and smelt the key issue that exists, a kind of method that high-phosphorus iron ore is produced acid pellet that fully utilizes is provided, add the part high-phosphorus iron ore, introduce magnesium oxide, make the phosphorus in the iron ore in pelletizing oxidation sintering process, enter in the combination mutually, pelletizing is in blast-furnace smelting, the fusion of semi-metal iron enters molten iron, and in conjunction with entering slag mutually, has increased the utilising efficiency of high-phosphorus iron ore.
Realize the technical measures of above-mentioned purpose:
Pelletizing with the high-phosphorus iron ore preparation, its component and weight part are: the iron ore powder of phosphorus content≤0.2%: 80～95 parts, and the high-phosphorus iron ore stone flour of phosphorus content 〉=0.2%: 1～20 part, magnesia powder: 1～5 part, bentonite in powder: 0.1～5 part, the granularity of each component all≤0.074 millimeter.
It is characterized in that: described magnesia powder is magnesia powder or konite powder.
Another technical measures that realize above-mentioned purpose are: with the pelletizing of high-phosphorus iron ore preparation, its component and weight part are: the iron ore powder of phosphorus content≤0.2% of granularity≤0.074 millimeter: 80～95 parts, the high-phosphorus iron ore stone flour of phosphorus content 〉=0.2% of granularity≤0.074 millimeter: 1～20 part, the magnesia powder of granularity≤0.074 millimeter: 1～5 part, 3.01～5.5 parts of the binding agents that mixes by the acrylic latex powder of the iron ore powder of 3～5 parts of phosphorus content≤0.2% and 0.01～1 part.
It is characterized in that: described magnesia powder is magnesia powder or konite powder.
It is characterized in that: as the granularity≤0.044mm of the iron ore powder of phosphorus content≤0.2% of binding agent.
It is very difficult that characteristics of the present invention are to overcome the iron ore smelting technology of high content of phosphorus, is difficult to remove the problem of phosphorus under reducing atmosphere; Utilize the production technique of acid pellet, in the iron ore powder of phosphorus content≤0.2%, add the part high-phosphorus iron ore, under oxidizing atmosphere, enter in the pelletizing combination mutually of semi-metal by of the phosphorus conversion of adding magnesium oxide iron ore, phosphorus is entered in the slag easily.Under the condition of present iron ore resource anxiety, fully utilize high phosphorus ore resource, have very meaning for the cost that reduces iron.
Embodiment
Be described further below:
Embodiment 1
Pelletizing with the high-phosphorus iron ore preparation, its component and weight part are: the Bessemer ore stone flour of phosphorus content≤0.2%: 80 parts, and the high-phosphorus iron ore stone flour of phosphorus content 〉=0.2%: 15 parts, magnesia powder: 2 parts, bentonite in powder: 3 parts, the granularity of each component all≤0.074 millimeter.
Embodiment 2
Pelletizing with the high-phosphorus iron ore preparation, its component and weight part are: the Bessemer ore stone flour of phosphorus content≤0.2%: 85 parts, and the high-phosphorus iron ore stone flour of phosphorus content 〉=0.2%: 7 parts, konite powder: 4.89 parts, bentonite in powder: 0.1 part, the granularity of each component all≤0.074 millimeter.
Embodiment 3
Pelletizing with the high-phosphorus iron ore preparation, its component and weight part are: the Bessemer ore stone flour of phosphorus content≤0.2%: 93 parts, and the high-phosphorus iron ore stone flour of phosphorus content 〉=0.2%: 1 part, konite powder: 1 part, bentonite in powder: 5 parts, the granularity of each component all≤0.074 millimeter.
Embodiment 4
Pelletizing with the high-phosphorus iron ore preparation, its component and weight part are: the Bessemer ore stone flour of phosphorus content≤0.2% of granularity≤0.074 millimeter: 90 parts, the high-phosphorus iron ore stone flour of phosphorus content 〉=0.2% of granularity≤0.074 millimeter: 5.49 parts, the magnesia powder of granularity≤0.074 millimeter: 1.5 parts, be crushed to≤3.01 parts of the Bessemer ore stone flour of 0.044mm and 0.01 part acrylic latex powder blended binding agents by 3 parts.
Embodiment 5
Pelletizing with the high-phosphorus iron ore preparation, its component and weight part are: the Bessemer ore stone flour of phosphorus content≤0.2% of granularity≤0.074 millimeter: 80 parts, the high-phosphorus iron ore stone flour of phosphorus content 〉=0.2% of granularity≤0.074 millimeter: 20 parts, the konite powder of granularity≤0.074 millimeter: 1.2 parts, be crushed to≤5 parts of the Bessemer ore stone flour of 0.044mm and 1 part acrylic latex powder blended binding agents by 4 parts.
Embodiment 6
Pelletizing with the high-phosphorus iron ore preparation, its component and weight part are: the Bessemer ore stone flour of phosphorus content≤0.2% of granularity≤0.074 millimeter: 95 parts, the high-phosphorus iron ore stone flour of phosphorus content 〉=0.2% of granularity≤0.074 millimeter: 2.5 parts, the magnesia powder of granularity≤0.074 millimeter: 1.5 parts, be crushed to≤5.5 parts of the Bessemer ore stone flour of 0.044mm and 0.5 part acrylic latex powder blended binding agents by 5 parts.
Table 1 experimental result cartogram
Can find out that from table 1 by adding prepared pelletizing behind the part high-phosphorus iron ore, 20% allocates that the P content of molten iron meets the requirements behind the furnace charge into, can satisfy blast furnace fully and produce needs.The pelletizing that P content is higher, because P has entered in the combination mutually of pelletizing, in blast furnace was produced, after the iron phase fusion of semi-metal entered in the molten iron, in conjunction with entering mutually in the slag, P removed easily.Blast furnace production ironmaking practice from Wuhan Iron and Steel Company, blast furnace is allocated the pelletizing amount into about 20%, even allocate the pelletizing of the high-phosphorus iron ore stone flour of 20% phosphorus content 〉=0.2% into, the molten iron P content of producing still can reach the requirement below 0.2%, by the dephosphorization of process for making, can satisfy the needs of Iron and Steel Production again.From ultimate compression strength, the ultimate compression strength of pelletizing is all greater than 2300N/, can use for the medium and small blast furnace below the 2000M3, and for large blast furnace, the ultimate compression strength of pelletizing requires can utilize high-phosphorus iron ore to produce the pelletizing that qualified molten iron satisfies production requirement too greater than 2500N/.Under the situation that iron ore resource is in short supply, comprehensive utilization high-phosphorus iron ore resource has the economic worth of reality at home.
Claims (5)
1. with the pelletizing of high-phosphorus iron ore preparation, its component and weight part are: the iron ore powder of phosphorus content≤0.2%: 80～95 parts, and the high-phosphorus iron ore stone flour of phosphorus content 〉=0.2%: 1～20 part, magnesia powder: 1～5 part, bentonite in powder: 0.1～5 part, the granularity of each component all≤0.074 millimeter.
2. the pelletizing with the high-phosphorus iron ore preparation as claimed in claim 1, it is characterized in that: described magnesia powder is magnesia powder or konite powder.
3. with the pelletizing of high-phosphorus iron ore preparation, its component and weight part are: the iron ore powder of phosphorus content≤0.2% of granularity≤0.074 millimeter: 80～95 parts, the high-phosphorus iron ore stone flour of phosphorus content 〉=0.2% of granularity≤0.074 millimeter: 1～20 part, the magnesia powder of granularity≤0.074 millimeter: 1～5 part, 3.01～5.5 parts of the binding agents that mixes by the acrylic latex powder of the iron ore powder of 3～5 parts of phosphorus content≤0.2% and 0.01～1 part.
4. the pelletizing with the high-phosphorus iron ore preparation as claimed in claim 3, it is characterized in that: described magnesia powder is magnesia powder or konite powder.
5. the pelletizing with high-phosphorus iron ore preparation as claimed in claim 3 is characterized in that: as the granularity≤0.044mm of the iron ore powder of phosphorus content≤0.2% of binding agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102750875A CN101921910B (en) | 2010-09-08 | 2010-09-08 | Pellet prepared from high-phosphorus iron ore |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102750875A CN101921910B (en) | 2010-09-08 | 2010-09-08 | Pellet prepared from high-phosphorus iron ore |
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| Publication Number | Publication Date |
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| CN101921910A true CN101921910A (en) | 2010-12-22 |
| CN101921910B CN101921910B (en) | 2011-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102750875A Expired - Fee Related CN101921910B (en) | 2010-09-08 | 2010-09-08 | Pellet prepared from high-phosphorus iron ore |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104212929A (en) * | 2014-08-19 | 2014-12-17 | 北京神雾环境能源科技集团股份有限公司 | Iron making method for treating high-phosphorus ore through direct reduction of gas-based shaft furnace and magnetic separation |
| CN107699688A (en) * | 2017-09-30 | 2018-02-16 | 徐州市伟华炉料有限公司 | A kind of high-phosphorus iron ore sphere of powder group |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0280521A (en) * | 1988-09-16 | 1990-03-20 | Kobe Steel Ltd | Two layer structure pellet for charging into blast furnace |
| CN1598010A (en) * | 2004-04-28 | 2005-03-23 | 陈有民 | Alkalinous pelletizing and preparation process thereof |
| CN101109042A (en) * | 2007-08-22 | 2008-01-23 | 由立伟 | Iron ore group adhesive agent |
-
2010
- 2010-09-08 CN CN2010102750875A patent/CN101921910B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0280521A (en) * | 1988-09-16 | 1990-03-20 | Kobe Steel Ltd | Two layer structure pellet for charging into blast furnace |
| CN1598010A (en) * | 2004-04-28 | 2005-03-23 | 陈有民 | Alkalinous pelletizing and preparation process thereof |
| CN101109042A (en) * | 2007-08-22 | 2008-01-23 | 由立伟 | Iron ore group adhesive agent |
Non-Patent Citations (1)
| Title |
|---|
| 《材料与冶金学报》 20070930 刘 君, 李光强, 朱诚意, 王昌安 高磷铁矿处理及高磷铁水脱磷研究进展 173-179 1-5 第6卷, 第3期 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104212929A (en) * | 2014-08-19 | 2014-12-17 | 北京神雾环境能源科技集团股份有限公司 | Iron making method for treating high-phosphorus ore through direct reduction of gas-based shaft furnace and magnetic separation |
| CN104212929B (en) * | 2014-08-19 | 2016-06-22 | 北京神雾环境能源科技集团股份有限公司 | The iron smelting method of gas-based shaft kiln directly reduced-magnetic separation separating treatment height phosphorus ore |
| CN107699688A (en) * | 2017-09-30 | 2018-02-16 | 徐州市伟华炉料有限公司 | A kind of high-phosphorus iron ore sphere of powder group |
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| Publication number | Publication date |
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| CN101921910B (en) | 2011-11-23 |
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Granted publication date: 20111123 Termination date: 20160908 |