CN105274279A - Method for thickening converter terminal slag - Google Patents
Method for thickening converter terminal slag Download PDFInfo
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- CN105274279A CN105274279A CN201510786906.5A CN201510786906A CN105274279A CN 105274279 A CN105274279 A CN 105274279A CN 201510786906 A CN201510786906 A CN 201510786906A CN 105274279 A CN105274279 A CN 105274279A
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- slag
- steel
- carbon content
- bottom blowing
- converter terminal
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Abstract
The invention discloses a method for thickening converter terminal slag. The method includes the steps that raw dolomite or lime particles are added within 30 s to 1 min before TSO according to the result of TSC carbon content testing, the flow of bottom blowing gas is controlled, and a carbon-oxygen reaction is promoted. By means of the method, the carbon-oxygen reaction can be promoted, the temperature of total iron in the slag and the steel release temperature can be decreased, and the purpose of increasing the concentration of the converter terminal slag can be achieved; and meanwhile recycling of iron can be promoted, slag entrapment is reduced in the steel release process, and meanwhile guarantees are provided for the slag splashing effect.
Description
Technical field
The present invention relates to converter field, particularly relate to a kind of method of multiviscosisty converter terminal slag.
Background technology
Along with the continued downturn of steel market, cost efficiency has become instantly and has needed the problem of solution in iron and steel enterprise's daily management mission from now on badly.Present stage, due to not high in kiln process terminal slag concentration, cause all iron content in slag high, the situation that slag is serious when putting steel simultaneously happens occasionally, so multiviscosisty converter terminal slag concentration, improves basicity of slag extremely urgent.
Converter current smelting endpoint no longer processes slag, directly put steel, when carbon content is below 0.10%, slag is rarer, slag is caused to mix out when putting steel, comparatively large on converter terminal impact, smelting endpoint is not to slag re-treating process simultaneously, directly puts steel when carbon, temperature, phosphorus meet processing requirement.
Owing to there is not the method for multiviscosisty converter terminal slag in currently available technology, namely other material is not added at the terminal smelted, in order to improve converter stability, reducing slag and reducing slag all iron content, therefore being necessary a kind of method that new multiviscosisty converter terminal slag is provided.
Summary of the invention
In order to overcome defect of the prior art, the invention provides a kind of method of multiviscosisty converter terminal slag, full iron can be realized reducing in slag by the method and putting steel temperature, finally reaching the object improving converter terminal slag concentration.
The method of multiviscosisty converter terminal slag provided by the invention comprises:
Test the result of carbon content according to TSC, before TSO, add unprocessed dolomite or lime particle in 30s ~ 1min, and control Bottom Blowing Gas Flow Rate, promote reaction between carbon and oxygen.
Preferably, described carbon content is 0.04-0.10%.
Preferably, when described carbon content is 0.04-0.07%, the amount adding unprocessed dolomite is 6.5-10kg/t steel or lime particle 12-15kg/t steel, and Bottom Blowing flow is 660-720Nm
3/ h.
Preferably, when described carbon content is 0.07-0.10%, the amount adding unprocessed dolomite is 3-6.5kg/t steel or lime particle 5-12kg/t steel, and Bottom Blowing flow is 600-660Nm
3/ h.
Preferably, described carbon content higher than 0.10% time, the amount adding unprocessed dolomite is 2-3kg/t steel or lime particle 3-5kg/t steel, and Bottom Blowing flow is 540-600Nm
3/ h.
Preferred, when described carbon content is 0.04%, the amount adding unprocessed dolomite is 10kg/t steel or lime particle 15kg/t steel, and Bottom Blowing flow is 720Nm
3/ h.
Preferred, when described carbon content is 0.07%, the amount adding unprocessed dolomite is 6.5kg/t steel or lime particle 12kg/t steel, and Bottom Blowing flow is 660Nm
3/ h.
Preferred, when described carbon content is 0.10%, the amount adding unprocessed dolomite is 3kg/t steel or lime particle 5kg/t steel, and Bottom Blowing flow is 600Nm
3/ h.
Preferably, described bottom blown gas is nitrogen or argon gas.
The present invention can improve converter terminal basicity of slag 3.0 ~ 3.5 by effectively regulating, and full iron controls below 17% simultaneously, reaches the object of cost efficiency.The present invention can promote reaction between carbon and oxygen, to reduce in slag full iron and puts steel temperature, reaches the object improving converter terminal slag concentration, can promote the recovery of iron simultaneously, and reduces slag when putting steel, provides safeguard for spattering slag effect simultaneously.Method of the present invention can keep each stove slag terminal basically identical, can improve converter stability, reduces slag and reduces slag all iron content.
Embodiment
The following is embodiments of the invention, it is only used as unrestricted for explanation of the present invention.
Embodiment 1
Produce steel grade, it is 0.05% that TSC records carbon content, and before TSO, 1min adds unprocessed dolomite 9kg/ (t steel) or lime particle 13kg/ (t steel), adopts bottom blowing nitrogen 700Nm
3/ h, after converter completes, detecting basicity of slag is 3.2, and all iron content is 14%, and the basicity of slag not adopting slag multiviscosisty technique to record is 2.8, and all iron content reaches 20%, significantly reduces cost, reaches the object of cost efficiency.
Preferred, when described carbon content is 0.07%, the amount adding unprocessed dolomite is 6.5kg/t steel or lime particle 12kg/t steel, and Bottom Blowing flow is 660Nm
3/ h.
Preferred, when described carbon content is 0.10%, the amount adding unprocessed dolomite is 3kg/t steel or lime particle 5kg/t steel, and Bottom Blowing flow is 600Nm
3/ h.
Embodiment 2
Produce steel grade, it is 0.04% that TSC records carbon content, and before TSO, 1min adds unprocessed dolomite 10kg/ (t steel) or lime particle 15kg/ (t steel), adopts bottom blowing nitrogen 720Nm
3/ h, after converter completes, detecting basicity of slag is 3.2, and all iron content is 15%, and the basicity of slag not adopting slag multiviscosisty technique to record is 2.7, and all iron content, higher than 20%, significantly reduces cost, reaches the object of cost efficiency.
Embodiment 3
Produce steel grade, it is 0.07% that TSC records carbon content, and before TSO, 1min adds unprocessed dolomite 6.5kg/ (t steel) or lime particle 12kg/ (t steel), adopts bottom blowing nitrogen 6600Nm
3/ h, after converter completes, detecting basicity of slag is 3.3, and all iron content is 13%, and the basicity of slag not adopting slag multiviscosisty technique to record is 2.8, and all iron content, higher than 20%, significantly reduces cost, reaches the object of cost efficiency.
Embodiment 4
Produce steel grade, it is 0.105% that TSC records carbon content, and before TSO, 1min adds unprocessed dolomite 3kg/ (t steel) or lime particle 5kg/ (t steel), adopts bottom blowing nitrogen 700Nm
3/ h, after converter completes, detecting basicity of slag is 3.2, and all iron content is 15%, and the basicity of slag not adopting slag multiviscosisty technique to record is 2.8, and all iron content, higher than 20%, significantly reduces cost, reaches the object of cost efficiency.
Claims (6)
1. a method for multiviscosisty converter terminal slag, comprising:
Test the result of carbon content according to TSC, before TSO, add unprocessed dolomite or lime particle in 30s ~ 1min, and control Bottom Blowing Gas Flow Rate, promote reaction between carbon and oxygen.
2. method according to claim 1, is characterized in that, described carbon content is 0.04-0.10%.
3. method according to claim 1 and 2, is characterized in that, when described carbon content is 0.04-0.07%, the amount adding unprocessed dolomite is 6.5-10kg/t steel or lime particle 12-15kg/t steel, and Bottom Blowing flow is 660-720Nm
3/ h.
4. method according to claim 1 and 2, is characterized in that, when described carbon content is 0.07-0.10%, the amount adding unprocessed dolomite is 3-6.5kg/t steel or lime particle 5-12kg/t steel, and Bottom Blowing flow is 600-660Nm
3/ h.
5. method according to claim 1 and 2, is characterized in that, when described carbon content is 0.10%, the amount adding unprocessed dolomite is 3kg/t steel or lime particle 5kg/t steel, and Bottom Blowing flow is 600Nm
3/ h.
6. method according to claim 1, is characterized in that, described carbon content higher than 0.10% time, the amount adding unprocessed dolomite is 2-3kg/t steel or lime particle 3-5kg/t steel, and Bottom Blowing flow is 540-600Nm
3/ h.
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|---|---|---|---|
| CN201510786906.5A CN105274279B (en) | 2015-11-16 | 2015-11-16 | A method of thickening converter terminal slag |
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|---|---|---|---|
| CN201510786906.5A CN105274279B (en) | 2015-11-16 | 2015-11-16 | A method of thickening converter terminal slag |
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| CN105274279A true CN105274279A (en) | 2016-01-27 |
| CN105274279B CN105274279B (en) | 2018-09-04 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705327A (en) * | 2009-11-17 | 2010-05-12 | 武汉钢铁(集团)公司 | Production technology of steel used for pipe line steel electrode |
| CN102747180A (en) * | 2012-07-25 | 2012-10-24 | 武汉钢铁(集团)公司 | Method for controlling Ti inclusion in hypereutectoid steel |
| CN102888487A (en) * | 2012-10-12 | 2013-01-23 | 武汉钢铁(集团)公司 | High-efficiency remaining slag smelting method of converters |
| CN103555879A (en) * | 2013-10-21 | 2014-02-05 | 莱芜钢铁集团有限公司 | Control method for reducing total iron content of SPHC (steel plate heat commercial) final slag |
| CN103789483A (en) * | 2014-02-17 | 2014-05-14 | 攀钢集团攀枝花钢钒有限公司 | Method for smelting low-phosphorus steel by using semi-steel |
-
2015
- 2015-11-16 CN CN201510786906.5A patent/CN105274279B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705327A (en) * | 2009-11-17 | 2010-05-12 | 武汉钢铁(集团)公司 | Production technology of steel used for pipe line steel electrode |
| CN102747180A (en) * | 2012-07-25 | 2012-10-24 | 武汉钢铁(集团)公司 | Method for controlling Ti inclusion in hypereutectoid steel |
| CN102888487A (en) * | 2012-10-12 | 2013-01-23 | 武汉钢铁(集团)公司 | High-efficiency remaining slag smelting method of converters |
| CN103555879A (en) * | 2013-10-21 | 2014-02-05 | 莱芜钢铁集团有限公司 | Control method for reducing total iron content of SPHC (steel plate heat commercial) final slag |
| CN103789483A (en) * | 2014-02-17 | 2014-05-14 | 攀钢集团攀枝花钢钒有限公司 | Method for smelting low-phosphorus steel by using semi-steel |
Non-Patent Citations (1)
| Title |
|---|
| 冶金工业部《中国钢铁工业年鉴》编辑委员会: "《中国钢铁工业年鉴 1985》", 31 December 1985, 冶金工业出版社 * |
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| CN105274279B (en) | 2018-09-04 |
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Inventor after: Zhang Li Inventor after: Wang Mingjie Inventor after: Wang Qiang Inventor after: Zhang Pei Inventor after: Yu Liangtao Inventor after: Hu Zengyue Inventor after: Wen Fuxin Inventor after: Zou Chunfeng Inventor before: Wang Mingjie Inventor before: Wang Qiang Inventor before: Zhang Pei Inventor before: Yu Liangtao Inventor before: Hu Zengyue Inventor before: Wen Fuxin Inventor before: Zou Chunfeng |
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Inventor after: Huang Shanshan Inventor after: Zhang Li Inventor after: Wang Mingjie Inventor after: Wang Qiang Inventor after: Zhang Pei Inventor after: Yu Liangtao Inventor after: Hu Zengyue Inventor after: Wen Fuxin Inventor after: Zou Chunfeng Inventor before: Zhang Li Inventor before: Wang Mingjie Inventor before: Wang Qiang Inventor before: Zhang Pei Inventor before: Yu Liangtao Inventor before: Hu Zengyue Inventor before: Wen Fuxin Inventor before: Zou Chunfeng |
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