CN1873031A - Dephosphorization agent for converter, and preparation method - Google Patents
Dephosphorization agent for converter, and preparation method Download PDFInfo
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- CN1873031A CN1873031A CN 200610026164 CN200610026164A CN1873031A CN 1873031 A CN1873031 A CN 1873031A CN 200610026164 CN200610026164 CN 200610026164 CN 200610026164 A CN200610026164 A CN 200610026164A CN 1873031 A CN1873031 A CN 1873031A
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- converter
- agent
- dephosphorising agent
- preparation
- iron
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Abstract
This invention relates to a method for preparing converter dephosphorization agent, which is composed of Fe2O3 40-60 wt.%, CaO 30-50 wt.%, Al2O3 1-10 wt.%, SiO2 1-10 wt.%, and MgO 0.1-10 wt.%. The method comprises: (1) pulverizing the above components, and mixing evenly; (2) premelting at 1000-1550 deg.C to obtain calcium ferroalumnates; (3) cooling, and processing into 3-50 mm particles of converter dephosphorization agent. The agent has such advantages as high dephosphorization rate, long storage time, low consumption, no fluorine content and little pollution.
Description
Technical field
Metallurgical technology field under the present invention, particularly a kind of Dephosphorising agent for converter especially is used for reducing the dephosphorizing agent of molten steel phosphorus content in converter steelmaking is produced.
Background technology
Phosphorus is in the smelting of steel, usually to be controlled as harmful element, because phosphorous height can make steel produce cold short phenomenon in the steel, in order to make under the low-temperature cold condition, cold short phenomenon does not take place in use or working steel products, and the phosphorus in the steel generally should be controlled at below 0.012%.And the phosphorus in clean steel and the ultra-low phosphoretic steel must be controlled at below 0.005%.For reaching this purpose, forward in another converter after steel mill adopts " double slag process " namely to adopt twice slag making or " two step method " namely to take a block converter with dephosphorization of molten iron in converter smelting mostly and smelt.These the two kinds methods that reduce phosphorus, the duration of heat is long, can only have in the situation more than needed in converter smelting production to carry out.Another kind method is that molten iron is carried out pre-treatment, and promptly " three take off " technology station has two kinds: metal mixer car and hot metal ladle.This technology is extensive use of in Japanese iron and steel enterprise, domestic Baoshan Iron and Steel Group etc. at present.But its deficiency be need, investment many with equipment greatly, processing procedure unit consumption height, temperature drop be big.
This area discloses multiple different components, composition and preparation method's dephosphorizing agent.Such as: " the medium phosphoric iron CaO-Fe that the people such as Niu Qiubin deliver
2O
3-Al
2O
3System and CaO-Fe
2O
3The research of series solvent extra furnace dephosphorization " (" chemical industry metallurgical " 1991, the 12nd the volume the 4th phase, the 290-294 page or leaf) reported and used CaO-Fe
2O
3-Al
2O
3Be flux is processed phosphorous about 0.45% medium phosphoric iron under laboratory condition dephosphorization result, laboratory result shows: (1) is for CaO-Fe
2O
3-Al
2O
3Be flux, its consumption is 10% of pig iron amount; (2) CaO-Fe
2O
3-Al
2O
3Be that flux is at Al
2O
3/ Fe
2O
3=1/9 o'clock dephosphorization effect the best is equivalent to Al in the flux
2O
3Content is 5%, and dephosphorization rate is more than 80%, and the terminal point phosphorus concentration can reach below 0.08% in the metal.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the invention provides the single slag converter smelting of a kind of employing, fall the Dephosphorising agent for converter of phosphorus control stabilization, it can make, and phosphorus element content effectively is controlled at below 0.010% in the steel, and wherein phosphorus element content effectively is controlled at below 0.005% in the best effect steel.
Technical scheme provided by the invention is a kind of dephosphorizing agent that is used for reducing the iron and steel phosphorus content in converter steelmaking is produced, and this Dephosphorising agent for converter is composed of the following components by weight percentage:
Iron oxide (Fe
2O
3) 40%～60%
Calcium oxide (CaO) 30%～50%
Alchlor (Al
2O
3) 1%～10%
Silicon-dioxide (SiO
2) 1%～10%
Magnesium oxide (MgO) 0.1%～10%
Dephosphorising agent for converter provided by the invention, its preparation method is: with the component of above-mentioned Dephosphorising agent for converter through broken, mix after, through 1000 ℃～1550 ℃ fritting of high temperature, the fusing reaction generates calcium aluminoferrite; And be processed into the granular Dephosphorising agent for converter of 3～50mm after will generating the calcium aluminoferrite cooling that obtains.
The Dephosphorising agent for converter of the present invention that adds 4～10 kg/tonnes in pneumatic steelmaking is produced can reach the purpose of dephosphorization.
Advantages such as Dephosphorising agent for converter of the present invention has dephosphorization efficient height, long preservative period, unit consumption is low, not fluorine-containing, environmental pollution is little.
The specific embodiment mode
For composition of the present invention, preparation method and implementation result clearly are described, the following example and implementation result now are provided, but anything but in order to limit the present invention.
With the component (all being weight percentage) among following arbitrary Dephosphorising agent for converter embodiment, through fragmentation, after mixing, through 1000 ℃～1550 ℃ fritting of high temperature, the fusing reaction generates the iron calcium aluminate; Iron calcium aluminate cooling post-treatment becomes the granular Dephosphorising agent for converter of 3～50mm.Also can in technical scheme provided by the invention, choose the material of getting one group of ratio as required wantonly and obtain Dephosphorising agent for converter by manufacture method provided by the invention.
| Component (weight percent) | Ferric oxide Fe 2O 3 | Calcium oxide CaO | Alchlor Al 2O 3 | Silicon-dioxide SiO 2 | Magnesium oxide MgO |
| Embodiment one | 40 | 50 | 4 | 5 | 1 |
| Embodiment two | 38 | 40 | 2 | 10 | 10 |
| Embodiment three | 48 | 40 | 5 | 2 | 5 |
| Embodiment four | 30 | 55 | 10 | 1 | 4 |
| Comparative Examples * | 50 | 48 | 2 |
*: Comparative Examples is " the medium phosphoric iron CaO-Fe that ox asks the refined people of grade to deliver
2O
3-Al
2O
3System and CaO-Fe
2O
3The research of series solvent extra furnace dephosphorization " (chemical industry metallurgical,, the 12nd the 4th phase of volume, 290～294 pages in 1991) report.
Implementation result
| Component | Converter molten steel (ton) | Dephosphorizing agent add-on (kilogram) | Original phosphorus content (%) | Phosphorus content in the blow off steel (%) | Dephosphorization rate (%) |
| Embodiment one | 300 | 3000 | 0.095 | 0.010 | 89.47 |
| Embodiment two | 300 | 2200 | 0.108 | 0.010 | 90.7 |
| Embodiment three | 300 | 3000 | 0.090 | 0.004 | 95.5 |
| Embodiment four | 300 | 2500 | 0.081 | 0.005 | 93.8 |
| Comparative Examples ** | 300 | 3000 | About 0.45 | 0.08 | 82.2 |
*: CaO-Fe
2O
3-Al
2O
3Series solvent, its consumption are 10% of pig iron amount.
Claims (3)
1. the present invention relates to a kind of Dephosphorising agent for converter and preparation method thereof, it is characterized in that, this Dephosphorising agent for converter is composed of the following components by weight percentage:
Iron oxide (Fe
2O
3) 40%～60%
Calcium oxide (CaO) 30%～50%
Alchlor (Al
2O
3) 1%～10%
Silicon-dioxide (SiO
2) 1%～10%
Magnesium oxide (MgO) 0.1%～10%
2. Dephosphorising agent for converter according to claim 1, its preparation method through 1000 ℃～1550 ℃ fritting, generate the iron calcium aluminate for the component of above-mentioned Dephosphorising agent for converter is pulverized, mixed.
3. the preparation method of Dephosphorising agent for converter according to claim 2 becomes the granular Dephosphorising agent for converter of 3～50mm with generating the iron calcium aluminate cooling post-treatment that obtains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610026164 CN1873031A (en) | 2006-04-28 | 2006-04-28 | Dephosphorization agent for converter, and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610026164 CN1873031A (en) | 2006-04-28 | 2006-04-28 | Dephosphorization agent for converter, and preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1873031A true CN1873031A (en) | 2006-12-06 |
Family
ID=37483630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610026164 Pending CN1873031A (en) | 2006-04-28 | 2006-04-28 | Dephosphorization agent for converter, and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1873031A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302578B (en) * | 2008-06-27 | 2010-06-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Composite vanadium extraction and dephosphorization agent for vanadium-containing molten iron and preparation thereof |
| CN101892352A (en) * | 2010-07-27 | 2010-11-24 | 辽宁天和矿产有限公司 | Arc furnace deep dephosphorization technology and deep dephosphorization agent thereof |
| CN103060522A (en) * | 2013-02-08 | 2013-04-24 | 武钢集团昆明钢铁股份有限公司 | Slag forming agent for dephosphorization of medium-high-phosphorus semisteel and preparation method of slag forming agent |
| CN105087866A (en) * | 2014-05-20 | 2015-11-25 | 中国科学院金属研究所 | Dephosphorization method for molten steel smelted by medium-frequency induction furnace |
| CN106916917A (en) * | 2017-03-03 | 2017-07-04 | 武汉振海科技有限公司 | A kind of method that aluminum oxide mine tailing (red mud) produces Dephosphorising agent for converter |
| CN110283965A (en) * | 2019-07-31 | 2019-09-27 | 西安建筑科技大学 | A kind of Dephosphorising agent and its preparation and application for hot metal containing low silicon steel-making |
| CN110964878A (en) * | 2019-12-26 | 2020-04-07 | 北京科技大学 | Dephosphorizing agent for efficiently dephosphorizing for converter and preparation method and application thereof |
-
2006
- 2006-04-28 CN CN 200610026164 patent/CN1873031A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302578B (en) * | 2008-06-27 | 2010-06-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Composite vanadium extraction and dephosphorization agent for vanadium-containing molten iron and preparation thereof |
| CN101892352A (en) * | 2010-07-27 | 2010-11-24 | 辽宁天和矿产有限公司 | Arc furnace deep dephosphorization technology and deep dephosphorization agent thereof |
| CN101892352B (en) * | 2010-07-27 | 2011-12-28 | 辽宁中汇环保科技有限公司 | Arc furnace deep dephosphorization technology and deep dephosphorization agent thereof |
| CN103060522A (en) * | 2013-02-08 | 2013-04-24 | 武钢集团昆明钢铁股份有限公司 | Slag forming agent for dephosphorization of medium-high-phosphorus semisteel and preparation method of slag forming agent |
| CN103060522B (en) * | 2013-02-08 | 2015-11-25 | 武钢集团昆明钢铁股份有限公司 | A kind of slag former and preparation method being applicable to middle high phosphorus semi-steel dephosphorizing |
| CN105087866A (en) * | 2014-05-20 | 2015-11-25 | 中国科学院金属研究所 | Dephosphorization method for molten steel smelted by medium-frequency induction furnace |
| CN105087866B (en) * | 2014-05-20 | 2017-05-17 | 中国科学院金属研究所 | Dephosphorization method for molten steel smelted by medium-frequency induction furnace |
| CN106916917A (en) * | 2017-03-03 | 2017-07-04 | 武汉振海科技有限公司 | A kind of method that aluminum oxide mine tailing (red mud) produces Dephosphorising agent for converter |
| CN110283965A (en) * | 2019-07-31 | 2019-09-27 | 西安建筑科技大学 | A kind of Dephosphorising agent and its preparation and application for hot metal containing low silicon steel-making |
| CN110964878A (en) * | 2019-12-26 | 2020-04-07 | 北京科技大学 | Dephosphorizing agent for efficiently dephosphorizing for converter and preparation method and application thereof |
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| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20061206 |