CN105274279B - A method of thickening converter terminal slag - Google Patents
A method of thickening converter terminal slag Download PDFInfo
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- CN105274279B CN105274279B CN201510786906.5A CN201510786906A CN105274279B CN 105274279 B CN105274279 B CN 105274279B CN 201510786906 A CN201510786906 A CN 201510786906A CN 105274279 B CN105274279 B CN 105274279B
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Abstract
The invention discloses a kind of methods of thickening converter terminal slag, including：According to TSC test carbon content as a result, unprocessed dolomite or lime particle is added in 30s~1min before TSO, and control Bottom Blowing Gas Flow Rate, promote reaction between carbon and oxygen.The present invention can promote reaction between carbon and oxygen, reduce full iron in slag and put steel temperature, achieve the purpose that improve converter terminal slag concentration, while can promote the recycling of iron, and reduce slag when putting steel, while providing safeguard to splash slag effect.
Description
Technical field
The present invention relates to converter field more particularly to a kind of methods of thickening converter terminal slag.
Background technology
With the continued downturn of steel market, cost efficiency has become instantly and iron and steel enterprise's daily management mission from now on
The problem of middle urgent need to resolve.At this stage, due to not high in kiln process terminal slag concentration, cause all iron content in slag high, simultaneously
When putting steel, slag serious situation happens occasionally, and then, is thickened converter terminal slag concentration, it is extremely urgent to improve basicity of slag.
Converter current smelting endpoint is no longer handled clinker, directly puts steel, when carbon content is below 0.10%, clinker
It is diluter, it causes slag to mix out when putting steel, is affected to converter terminal, while smelting endpoint is to clinker re-treating process,
Steel is directly put when carbon, temperature, phosphorus meet technological requirement.
Due in currently available technology and there is no the methods of thickening converter terminal slag, i.e., in the terminal of smelting and being added without
Other materials reduce slag and reduce clinker all iron content to improve converter stability, therefore it is necessary to provide a kind of new
The method for being thickened converter terminal slag.
Invention content
In order to overcome the defects of the prior art, the present invention provides a kind of methods of thickening converter terminal slag, by this
Method may be implemented to reduce full iron in slag and put steel temperature, be finally reached the purpose for improving converter terminal slag concentration.
It is provided by the invention thickening converter terminal slag method include:
According to TSC test carbon content as a result, unprocessed dolomite or lime particle is added in 30s~1min before TSO,
And Bottom Blowing Gas Flow Rate is controlled, promote reaction between carbon and oxygen.
Preferably, the carbon content is 0.04-0.10%.
Preferably, when the carbon content is 0.04-0.07%, the amount that unprocessed dolomite is added is 6.5-10kg/t steel or lime
Particle 12-15kg/t steel, bottom blowing throughput are 660-720Nm3/h。
Preferably, when the carbon content is 0.07-0.10%, the amount that unprocessed dolomite is added is 3-6.5kg/t steel or lime
Particle 5-12kg/t steel, bottom blowing throughput are 600-660Nm3/h。
Preferably, when the carbon content is higher than 0.10%, the amount that unprocessed dolomite is added is 2-3kg/t steel or lime particle 3-
5kg/t steel, bottom blowing throughput are 540-600Nm3/h。
It is furthermore preferred that when the carbon content is 0.04%, the amount that unprocessed dolomite is added is 10kg/t steel or lime particle
15kg/t steel, bottom blowing throughput are 720Nm3/h。
It is furthermore preferred that when the carbon content is 0.07%, the amount that unprocessed dolomite is added is 6.5kg/t steel or lime particle
12kg/t steel, bottom blowing throughput are 660Nm3/h。
It is furthermore preferred that when the carbon content is 0.10%, the amount that unprocessed dolomite is added is 3kg/t steel or lime particle 5kg/
T steel, bottom blowing throughput are 600Nm3/h。
Preferably, the bottom blown gas is nitrogen or argon gas.
Converter terminal basicity of slag can be improved 3.0~3.5 by effectively adjusting in the present invention, at the same the control of full iron 17% with
Under, achieve the purpose that cost efficiency.The present invention can promote reaction between carbon and oxygen, reduce full iron in slag and put steel temperature, reach and carry
The purpose of high converter terminal slag concentration, while the recycling of iron can be promoted, and slag is reduced when putting steel, while to splash slag effect
It provides safeguard.The method of the present invention can keep each stove clinker terminal almost the same, can be improved converter stability, reduce slag and
Reduce clinker all iron content.
Specific implementation mode
The embodiment of the present invention is the following is, is used only as illustrating rather than limitation for the present invention.
Embodiment 1
Produce steel grade, TSC measure carbon content be 0.05%, before TSO 1min be added unprocessed dolomite 9kg/ (t steel) or
Lime particle 13kg/ (t steel), using bottom blowing nitrogen 700Nm3/ h, after the completion of converter, detection basicity of slag is 3.2, Quan Tiehan
Amount is 14%, and without using the basicity of slag that clinker thickening technique measures, all iron content reaches 20%, significantly reduces for 2.8
Cost achievees the purpose that cost efficiency.
It is furthermore preferred that when the carbon content is 0.07%, the amount that unprocessed dolomite is added is 6.5kg/t steel or lime particle
12kg/t steel, bottom blowing throughput are 660Nm3/h。
It is furthermore preferred that when the carbon content is 0.10%, the amount that unprocessed dolomite is added is 3kg/t steel or lime particle 5kg/
T steel, bottom blowing throughput are 600Nm3/h。
Embodiment 2
Produce steel grade, TSC measure carbon content be 0.04%, before TSO 1min be added unprocessed dolomite 10kg/ (t steel) or
Person's lime particle 15kg/ (t steel), using bottom blowing nitrogen 720Nm3/ h, after the completion of converter, detection basicity of slag is 3.2, Quan Tie
Content is 15%, and without using the basicity of slag that clinker thickening technique measures for 2.7, all iron content is higher than 20%, significantly reduces
Cost, achievees the purpose that cost efficiency.
Embodiment 3
Produce steel grade, TSC measure carbon content be 0.07%, before TSO 1min be added unprocessed dolomite 6.5kg/ (t steel) or
Person's lime particle 12kg/ (t steel), using bottom blowing nitrogen 6600Nm3/ h, after the completion of converter, detection basicity of slag is 3.3, entirely
Iron content is 13%, and without using the basicity of slag that clinker thickening technique measures for 2.8, all iron content is higher than 20%, significantly drops
Low cost, achievees the purpose that cost efficiency.
Embodiment 4
Produce steel grade, TSC measure carbon content be 0.105%, before TSO 1min be added unprocessed dolomite 3kg/ (t steel) or
Person's lime particle 5kg/ (t steel), using bottom blowing nitrogen 700Nm3/ h, after the completion of converter, detection basicity of slag is 3.2, Quan Tie
Content is 15%, and without using the basicity of slag that clinker thickening technique measures for 2.8, all iron content is higher than 20%, significantly reduces
Cost, achievees the purpose that cost efficiency.
Claims (3)
1. a kind of method of thickening converter terminal slag, including：
According to TSC test carbon content as a result, unprocessed dolomite or lime particle is added in 30s~1min before TSO, and control
Bottom Blowing Gas Flow Rate processed promotes reaction between carbon and oxygen；
When the carbon content is 0.04-0.07%, the amount that unprocessed dolomite is added is 6.5-10kg/t steel or lime particle 12-
15kg/t steel, bottom blowing throughput are 660-720Nm3/h；
When the carbon content is 0.07-0.10%, the amount that unprocessed dolomite is added is 3-6.5kg/t steel or lime particle 5-12kg/t
Steel, bottom blowing throughput are 600-660Nm3/h。
2. according to the method described in claim 1, it is characterized in that, when the carbon content is 0.10%, unprocessed dolomite is added
Amount is 3kg/t steel or lime particle 5kg/t steel, and bottom blowing throughput is 600Nm3/h。
3. according to the method described in claim 1, it is characterized in that, when the carbon content is higher than 0.10%, unprocessed dolomite is added
Amount be 2-3kg/t steel or lime particle 3-5kg/t steel, bottom blowing throughput be 540-600Nm3/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 CN105274279A (en) | 2016-01-27 |
| CN105274279B true 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 |
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| CN105274279A (en) | 2016-01-27 |
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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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