CN1710113A - Dephosphorization treating method for iron-ore and refined iron powder - Google Patents
Dephosphorization treating method for iron-ore and refined iron powder Download PDFInfo
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- CN1710113A CN1710113A CN 200510017568 CN200510017568A CN1710113A CN 1710113 A CN1710113 A CN 1710113A CN 200510017568 CN200510017568 CN 200510017568 CN 200510017568 A CN200510017568 A CN 200510017568A CN 1710113 A CN1710113 A CN 1710113A
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- iron
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- dephosphorization
- hydrochloric acid
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Abstract
The invention discloses a processing technique on iron ore and iron powder concentrate dephosphorization which effectively dealt with the problem that the iron ore and iron powder concentrate could not be put to iron refining due to excessive phosphor content. The concrete techniques is explained as following steps: crush the iron ore and iron powder concentrate into rough particles and put into dephosphorization container together with dilute hydrochloric acid solution of the same volume, heat them at the temperature between 55 to 75 deg.C for 25 to 40 minutes, wash the particles with fresh water after the dilute hydrochloric solution is filtered and all left is re-picked. The technique is simple and of low cost, effective dephoshporization.
Description
One, technical field
The present invention relates to a kind of treatment process of smelting in the pig iron the iron-ore and refined iron powder dephosphorization.
Two, background technology
The raw material that iron ore, the smart powder of iron are the refining pig iron.As everybody knows, iron ore, contain sulphur in the smart powder of iron, phosphorus, impurity such as silicon, what of its impurity amount, influence the smelting and the quality of the pig iron greatly, these impurity are as iron ore, objectionable impurities in the smart powder of iron, when being smelt the pig iron, must remove or reduce, otherwise can't reach demand to the pig iron, and as the sulphur (S) of objectionable impurities, silicon (Si) can be removed (existing ripe common technology) before ironmaking or in the smelting process, yet the processing to phosphorus (P) impurity but is a hard nut to crack always, adopted many technical measures, do not removed phosphorus but still there are effective ways at present.And the existence of high-content phosphorus in the smart powder of iron ore, iron, iron ore, the smart powder of iron can't be utilized, tool is understood present many iron ores because phosphorous too high and can't exploit, as An County, Luoyang, Henan Province one large-scale rhombohedral iron ore is arranged, average grade is more than 50%, only utilized (answering below＜0.09%) exploiting on 2% by ironmaking requirement phosphorus content because of phosphorous, this is undoubtedly the significant wastage to iron ore deposit, do not satisfy far away in the modernization construction the needs of iron and steel yet, all unfavorable in state in the people.Therefore, the exploitation utilization of high phosphorus ore is a problem anxious to be solved.
Three, summary of the invention
At above-mentioned situation, the present invention's purpose just provides a kind of iron ore, the treatment process of the smart powder dephosphorization of iron, can effectively solve iron ore, the smart powder of iron is phosphorous too high and can not be by the problem of the usefulness of ironmaking, the technical scheme of its solution is, with high phosphorus-containing iron ore, the smart powder of iron is ground into coarse particles, insert in the dephosphorization container, add isopyknic dilute hydrochloric acid solution and heating again, after reacting 25-40 minute under 55-75 ℃, the elimination hydrochloric acid soln, again with the flushing with clean water sour residue that desalts, gravity treatment gets final product, and the inventive method is simple, and is easy to operate, cost is low, dephosphorization effect is good, can effectively solve high phosphorus-containing iron ore, the ironmaking problem of the smart powder of iron is for necessary condition has been created in the exploitation and the utilization of high-phosphorus iron ore, and, opened up wide new world for the ironmaking industry provides abundant raw material.
Four, embodiment
Below in conjunction with particular case embodiment of the present invention is elaborated.
Provide by the aforementioned techniques scheme, iron ore of the present invention, the treatment process of the smart powder dephosphorization of iron is earlier with high phosphorus-containing iron ore, the smart powder of iron is ground into 40-60 purpose coarse particles, insert in the dephosphorization container, the mass concentration that adds equal-volume (1: 1) again is the hydrochloric acid soln of 13-18% (available quality concentration is that the concentrated hydrochloric acid thin up more than 95% forms dilute hydrochloric acid solution), heat its coarse particles and hydrochloric acid mixed solution, after reacting 25-40 minute under 55-75 ℃, elimination hydrochloric acid soln (this liquid can reuse), remove the hydrochloric acid raffinate with flushing with clean water, gravity treatment again (desiliconization) gets final product.
The present invention preferably pulverizes high phosphorus-containing iron ore, the smart powder of iron abrasive dust and becomes 50 orders, inserts in dephosphorization pond or the dephosphorization jar, and the hydrochloric acid soln that adds mass concentration 15% with volume ratio at 1: 1 (is 5M
3Breeze add 5M
3The volumetrical hydrochloric acid soln), mixed solution is heated to 55-75 ℃, thermal response 30 minutes, the phosphorus gasification is discharged, thereby realize dephosphorization fan's purpose, after the gravity treatment of whirlwind-type gravity concentrator, just can become and meet the required raw material of ironmaking, enter other ironmaking operations, gravity treatment is desiliconization, also be the essential of ironmaking, it should be appreciated that, if sulfur-containing impurities exceeds standard in the ore, only need after iron ore is pulverized,, add hydrochloric acid soln again 650 ℃ of first roastings down, except that roasting, other technologies are identical.
The smart powder of the iron that the present invention obtains satisfies the requirement of ironmaking to iron ore fully, the ironmaking of GB regulation is now measured through quality testing department with iron ore phosphorus content＜0.09%, and the powdered iron ore phosphorus content after the present invention handles is below 0.05%, even can reach below 0.018%, through repeated detection, its technical maturity, steady quality, the iron powder total quality is good: grade is more than 63%, sulphur＜0.3%, silicon-dioxide＜7%, phosphorus＜0.05% meets the requirement of ironmaking fully.From the above, the invention solves and appear very simple, but unsolved for a long time technical barrier, it is the creativeness developing that the phosphorous iron material of height is handled, for prospect has been created in the exploitation utilization of high phosphorus ore wide, be the invention greatly of one during ironmaking is produced, must make creative contribution for the development of ironmaking.
Claims (3)
1, a kind of treatment process of iron-ore and refined iron powder dephosphorization, it is characterized in that: high phosphorus-containing iron ore, the smart powder of iron are ground into 40-60 purpose coarse particles, insert in the dephosphorization container, add the hydrochloric acid soln that isopyknic mass concentration is 13-18% again, heat its coarse particles and hydrochloric acid mixed solution, after reacting 25-40 minute under 55-75 ℃, the elimination hydrochloric acid soln, remove hydrochloric acid raffinate, gravity treatment again with flushing with clean water.
2, the treatment process of iron-ore and refined iron powder dephosphorization according to claim 1, it is characterized in that said high phosphorus-containing iron ore, the smart powder pulverizing of iron abrasive dust become 50 orders, insert in dephosphorization pond or the dephosphorization jar, the hydrochloric acid soln that adds mass concentration 15% with volume ratio at 1: 1, mixed solution is heated to 55-75 ℃, thermal response 30 minutes is discharged the phosphorus gasification, with the gravity treatment of whirlwind-type gravity concentrator.
3, the treatment process of iron-ore and refined iron powder dephosphorization according to claim 1 is characterized in that, when the iron ore sulfur-bearing exceeded standard, said iron ore coarse particles was 650 ℃ of iron ore coarse particless after the following roasting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510017568 CN1279188C (en) | 2005-05-12 | 2005-05-12 | Dephosphorization treating method for iron-ore and refined iron powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510017568 CN1279188C (en) | 2005-05-12 | 2005-05-12 | Dephosphorization treating method for iron-ore and refined iron powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1710113A true CN1710113A (en) | 2005-12-21 |
| CN1279188C CN1279188C (en) | 2006-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510017568 Expired - Fee Related CN1279188C (en) | 2005-05-12 | 2005-05-12 | Dephosphorization treating method for iron-ore and refined iron powder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424202C (en) * | 2007-04-28 | 2008-10-08 | 中南大学 | Dephosphorization method of phosphorus-containing iron ore |
| US8197598B2 (en) * | 2008-04-03 | 2012-06-12 | Tsinghua University | Method for manufacturing iron silicide nano-wires |
-
2005
- 2005-05-12 CN CN 200510017568 patent/CN1279188C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424202C (en) * | 2007-04-28 | 2008-10-08 | 中南大学 | Dephosphorization method of phosphorus-containing iron ore |
| US8197598B2 (en) * | 2008-04-03 | 2012-06-12 | Tsinghua University | Method for manufacturing iron silicide nano-wires |
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| Publication number | Publication date |
|---|---|
| CN1279188C (en) | 2006-10-11 |
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Granted publication date: 20061011 Termination date: 20130512 |