CN104805252A - Method for modifying silicon steel top slags - Google Patents
Method for modifying silicon steel top slags Download PDFInfo
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- CN104805252A CN104805252A CN201510244574.8A CN201510244574A CN104805252A CN 104805252 A CN104805252 A CN 104805252A CN 201510244574 A CN201510244574 A CN 201510244574A CN 104805252 A CN104805252 A CN 104805252A
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Abstract
The invention discloses a method for modifying silicon steel top slags. Aluminum iron powder or aluminum powder is tiled on the surfaces of ladle top slags; molten steel drastically reacts by a mode of feeding a calcium line in the molten steel, and further the aim of deoxidizing steel slags is achieved; in addition, certain standing time is required; the method is suitable for modifying the top slags of silicon steel; the deoxidization effect of the steel slags is guaranteed, and smooth operation of continuous casting of a CSP (Cast Steel Plate) casting machine is guaranteed.
Description
Technical field
The present invention relates to field of steel metallurgy, particularly a kind of method of silicon steel ladle top slag upgrading.
Background technology
For silicon steel is produced, typical top slag method for modifying is that RH process terminates backward molten steel surface hand throwing part ferro-aluminum powder or directly add top slag upgrading reductive agent mode to carry out silicon steel top slag upgrading at present, the method of ferro-aluminum powder is thrown to molten steel surface hand, labor strength is large, upgrading weak effect, the requirement that CSP casting machine silicon steel continuous waters can not be ensured, the method cost adding top slag upgrading reductive agent is high, but when adopting " converter-RH-continuous casting " operational path to produce silicon steel, owing to ladle top slag fully can not be reduced as LF refining, FeO and MnO content after RH refining terminates in slag is very high.Ladle top slag still belongs to high oxidative slag, and in casting process, the oxygen in slag, in a large number to molten steel transmission, reacts with AIs in steel and produces a large amount of A1
2o
3be mingled with, affect Cleanliness of Molten Steel, serious also causing stores stream, not easily realizes sequence casting.
Summary of the invention
In order to overcome the shortcoming of prior art, the invention provides the method for a kind of silicon steel top slag upgrading, what not only solve production silicon steel continuous casting of molten steel casting cycle stores flow problem, achieves many stoves continuous casting; The cleanliness factor of molten steel can be improved simultaneously, reduce the inclusion in steel and steel surface defect, improve the magnetic property of silicon steel.
Technical problem to be solved by this invention is the feed postition by changing ferro-aluminum powder, by Calcium treatment mode, provides the method for a kind of silicon steel top slag upgrading.
For reaching above-mentioned purpose, the method for the present invention, a kind of silicon steel top slag upgrading, comprises the following steps:
1) ferro-aluminum powder is added to slag surface uniform, described ferro-aluminum powder add-on=83*G* [O]/η;
Wherein: G is top slag weight;
[O] is the weight percentage of free oxygen in molten steel during RH decarburization terminal;
η is the mass percentage of aluminium in ferro-aluminum powder;
2) take the mode of Calcium treatment to feed calcium line in molten steel, stir slag blanket and the oxygen in slag is removed by the calcium of the ferro-aluminum powder on surface and feeding;
3) leave standstill, to make in steel, because the feeding bits that are mixed into of calcium line and oxide inclusion float, to improve the steel quality of cast, meet the production requirement of silicon steel.
Wherein said calcium line is silicon-calcium wire or iron calcium line.
In wherein said stating step, time of repose is not less than 10 minutes.
The invention difference from existing technology is that the present invention achieves following technique effect:
The present invention not only solve produce silicon steel continuous casting of molten steel casting cycle store flow problem, achieve many stoves continuous casting; The cleanliness factor of molten steel can be improved simultaneously, reduce the inclusion in steel and steel surface defect, improve the magnetic property of silicon steel.
Embodiment
Below in conjunction with embodiment, the technical characteristic other to the characteristic sum that the present invention is above-mentioned and advantage are described in more detail.
The method of a kind of silicon steel top of the present invention slag upgrading, mainly be less than 50mm by the quantity of slag under control converter tapping, argon gas is not opened in tapping process, in ladle, metallurgy lime and partial synthesis slag (synthetic slag component is as table 1) is added in tapping process, lime adding amount is 2-3.5kg/t steel, synthetic slag add-on is 1-1.5kg/t steel, add the ferro-aluminum powder (ferro-aluminum powder component is as table 2) of about 100kg to ladle molten steel surface after having gone out steel, the laggard row relax of RH is hung in converter after having gone out steel, RH decarburization terminates, after adding ferrosilicon and aluminum shot deoxidation, carry out alloying, ensure that pure degassing time is pressed after being greater than 5 minutes again, afterwards, by ferro-aluminum powder throwing device, ferro-aluminum powder general uniform is made to cover ladle top slag surface, then by feeding part silicon-calcium wire or iron calcium line (feed quantity is 200-300 rice), it is specifically intended that, line feeding process does not carry out BOTTOM ARGON BLOWING operation, after Calcium treatment, molten steel leaves standstill more than 10 minutes, ensure that in slag, (FeO+MnO) content is less than 7%, thus reach the object of top slag upgrading.Table 3 pushes up slag ingredient for after upgrading, and table 4 is magnetic property mean value contrast before and after the slag upgrading of different steel grade tops.
Table 1: synthetic slag component
| CaO. | Mg0. | SiO 2. | CaF 2. | Al 2O 3. | H 2O. | Fe 2O 3. |
| ≥30 | ≤1.5 | ≤10 | 2-4 | ≥50 | ≤0.6 | ≤1.5 |
Table 2: ferro-aluminum powder component
| MAl | C | P | S |
| 44-49 | ≤0.20 | ≤0.03 | ≤0.03 |
Table 3: ladle top slag composition after upgrading
Magnetic property mean value contrast before and after the slag upgrading of table 4 different steel grade top
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (3)
1. a method for silicon steel top slag upgrading, is characterized in that comprising the following steps:
1) ferro-aluminum powder is added to slag surface uniform, described ferro-aluminum powder add-on=83*G* [O]/η;
Wherein: G is top slag weight;
[O] is the weight percentage of free oxygen in molten steel during RH decarburization terminal;
η is the mass percentage of aluminium in ferro-aluminum powder;
2) take the mode of Calcium treatment to feed calcium line in molten steel, stir slag blanket and the oxygen in slag is removed by the calcium of the ferro-aluminum powder on surface and feeding;
3) leave standstill, to make in steel, because the feeding bits that are mixed into of calcium line and oxide inclusion float, to improve the steel quality of cast, meet the production requirement of silicon steel.
2. the method for silicon steel top according to claim 1 slag upgrading, is characterized in that: described calcium line is silicon-calcium wire or iron calcium line.
3. the method for silicon steel top according to claim 1 slag upgrading, is characterized in that: in described stating step, time of repose is not less than 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510244574.8A CN104805252A (en) | 2015-05-14 | 2015-05-14 | Method for modifying silicon steel top slags |
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| CN201510244574.8A CN104805252A (en) | 2015-05-14 | 2015-05-14 | Method for modifying silicon steel top slags |
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| CN104805252A true CN104805252A (en) | 2015-07-29 |
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| CN201510244574.8A Pending CN104805252A (en) | 2015-05-14 | 2015-05-14 | Method for modifying silicon steel top slags |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105331764A (en) * | 2015-10-29 | 2016-02-17 | 内蒙古包钢钢联股份有限公司 | Direct-supply RH refining method for smelting SS400 steel grade through 210t converter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001073025A (en) * | 1999-08-31 | 2001-03-21 | Sumitomo Metal Ind Ltd | Method for reforming slag in ladle |
| CN101545067A (en) * | 2009-05-15 | 2009-09-30 | 首钢总公司 | Method for producing pipe line steel J55 by RH refining technology |
| CN102108430A (en) * | 2009-12-25 | 2011-06-29 | 鞍钢股份有限公司 | Ultra-low carbon steel slag modifier and adding method thereof |
| CN103305659A (en) * | 2012-03-08 | 2013-09-18 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with excellent magnetism and calcium treatment method thereof |
| CN103451376A (en) * | 2013-08-29 | 2013-12-18 | 鞍钢股份有限公司 | Method for rapidly and accurately controlling oxidation degree of slag |
| CN103509906A (en) * | 2012-06-29 | 2014-01-15 | 宝山钢铁股份有限公司 | Smelting method of non-oriented electrical steel plate with excellent magnetism |
| CN103937926A (en) * | 2014-03-26 | 2014-07-23 | 江苏省沙钢钢铁研究院有限公司 | Production method of ultra-low carbon steel and ultra-low oxygen content molten steel |
-
2015
- 2015-05-14 CN CN201510244574.8A patent/CN104805252A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001073025A (en) * | 1999-08-31 | 2001-03-21 | Sumitomo Metal Ind Ltd | Method for reforming slag in ladle |
| CN101545067A (en) * | 2009-05-15 | 2009-09-30 | 首钢总公司 | Method for producing pipe line steel J55 by RH refining technology |
| CN102108430A (en) * | 2009-12-25 | 2011-06-29 | 鞍钢股份有限公司 | Ultra-low carbon steel slag modifier and adding method thereof |
| CN103305659A (en) * | 2012-03-08 | 2013-09-18 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with excellent magnetism and calcium treatment method thereof |
| CN103509906A (en) * | 2012-06-29 | 2014-01-15 | 宝山钢铁股份有限公司 | Smelting method of non-oriented electrical steel plate with excellent magnetism |
| CN103451376A (en) * | 2013-08-29 | 2013-12-18 | 鞍钢股份有限公司 | Method for rapidly and accurately controlling oxidation degree of slag |
| CN103937926A (en) * | 2014-03-26 | 2014-07-23 | 江苏省沙钢钢铁研究院有限公司 | Production method of ultra-low carbon steel and ultra-low oxygen content molten steel |
Non-Patent Citations (2)
| Title |
|---|
| 俞海明: "《转炉钢水的炉外精炼技术》", 31 August 2011, 冶金工业出版社 * |
| 蔡开科: "《连铸坯质量控制》", 31 May 2010, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105331764A (en) * | 2015-10-29 | 2016-02-17 | 内蒙古包钢钢联股份有限公司 | Direct-supply RH refining method for smelting SS400 steel grade through 210t converter |
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Application publication date: 20150729 |