CN103388043B - Converter low silicon smelting method - Google Patents
Converter low silicon smelting method Download PDFInfo
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- CN103388043B CN103388043B CN201310310634.2A CN201310310634A CN103388043B CN 103388043 B CN103388043 B CN 103388043B CN 201310310634 A CN201310310634 A CN 201310310634A CN 103388043 B CN103388043 B CN 103388043B
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- serpentine
- molten iron
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- magnesia
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Abstract
A kind of converter low silicon smelting method, it is characterized in that adding with silica and magnesia the serpentine as main component at initial smelting period, silicone content in molten iron is improved to 0.20% 0.30%, adding serpentine and be equivalent to add the content of silicon in molten iron, the directly silica in serpentine of the calcium oxide in lime is combined slagging.The present invention refines early stage and adds serpentine; calcium oxide in the lime directly silica in serpentine is combined slagging thus solves slagization and do not open; process returns dry phenomenon and steel adhesion on oxygen lance phenomenon; magnesia in serpentine can play and protect the effect of furnace lining to add content of magnesia in slag simultaneously; making slag splashing effect strengthen, life of converter is extended.
Description
Technical field
The invention belongs to steelmaking technical field.
Background technology
In converter smelting technical field, in molten iron, silicone content (0.08%-0.20%) is low, easily occurs that slagization is not opened, and little being very easy to occurs returning dry phenomenon the quantity of slag, adds metal loss；Furnace lining is washed away aggravation by oxygen stream, and steel adhesion on oxygen lance is seriously difficult to clear up, and adds the amount of labour；Difficulty is added in daily smelting.
Summary of the invention
It is an object of the invention to provide a kind of converter low silicon smelting method, low to solve prior art molten iron silicon, easily occur that slagization is not opened little being very easy to of the quantity of slag and occurred that returning dry phenomenon adds metal loss, furnace lining is washed away aggravation by oxygen stream, steel adhesion on oxygen lance is seriously difficult to clear up, and adds the amount of labour.The problems such as difficulty are added in daily smelting.
The technical solution adopted for the present invention to solve the technical problems is to add with silica and magnesia the serpentine as main component at initial smelting period, silicone content in molten iron is improved to 0.20%-0.30%, adding serpentine and be equivalent to add the content of silicon in molten iron, the directly silica in serpentine of the calcium oxide in lime is combined slagging.It is specifically filled a prescription:
Dolomite: 13-15 kg/ton steel, molten iron: 900-1030 kg/ton steel, lime: 36-43 kg/ton steel, serpentine: often increase by 0.01% silicon, need to add 0.55 kilogram-0.65 kilogram of serpentine.
Above-mentioned do not add serpentine before in molten iron silicone content be 0.08%-0.20%.
After increase serpentine, in molten iron, silicone content is 0.2%-0.30%.
Using the positive effect of the present invention is that refining early stage adds serpentine; calcium oxide in the lime directly silica in serpentine is combined slagging thus solves slagization and do not open; process returns dry phenomenon and steel adhesion on oxygen lance phenomenon; magnesia in serpentine can play and protect the effect of furnace lining to add content of magnesia in slag simultaneously; making slag splashing effect strengthen, life of converter is extended.
Detailed description of the invention
Embodiment 1
In the molten iron bought on market, silicone content is 0.10%, the serpentine as main component is added with silica and magnesia at initial smelting period, silicone content in molten iron is improved to 0.22%, adding serpentine and be equivalent to add the content of silicon in molten iron, the directly silica in serpentine of the calcium oxide in lime is combined slagging.It is specifically filled a prescription: dolomite: 13 kg/ton steel, molten iron: 950 kg/ton steel, lime: 37 kg/ton steel, serpentine: 7.2 kilograms.
Wherein after increase serpentine, in molten iron, silicone content is 0.22%.
Its smelting process is same as the prior art.
Embodiment 2
In the molten iron bought on market, silicone content is 0.15%, the serpentine as main component is added with silica and magnesia at initial smelting period, silicone content in molten iron is improved to 0.25%, adding serpentine and be equivalent to add the content of silicon in molten iron, the directly silica in serpentine of the calcium oxide in lime is combined slagging.It is specifically filled a prescription: dolomite: 14 kg/ton steel, molten iron: 990 kg/ton steel, lime: 40 kg/ton steel, serpentine: 6 kilograms.
Wherein after increase serpentine, in molten iron, silicone content is 0.25%.
Its smelting process is same as the prior art.
Embodiment 3
In the molten iron bought on market, silicone content is 0.17%, the serpentine as main component is added with silica and magnesia at initial smelting period, silicone content in molten iron is improved to 0.28%, adding serpentine and be equivalent to add the content of silicon in molten iron, the directly silica in serpentine of the calcium oxide in lime is combined slagging.It is specifically filled a prescription: dolomite: 14.5 kg/ton steel, molten iron: 1020 kg/ton steel, lime: 42 kg/ton steel, serpentine: 6.93 kilograms.
Wherein after increase serpentine, in molten iron, silicone content is 0.28%.
Its smelting process is same as the prior art.
Claims (1)
1. a converter low silicon smelting method, it is characterized in that adding with silica and magnesia the serpentine as main component at initial smelting period, silicone content in molten iron is improved to 0.22%-0.30%, adding serpentine and be equivalent to add the content of silicon in molten iron, the directly silica in serpentine of the calcium oxide in lime is combined slagging；It is specifically filled a prescription: dolomite: 13-15 kg/ton steel, molten iron: 900-1030 kg/ton steel, lime: 36-43 kg/ton steel, serpentine: often increase by 0.01% silicon, needs to add 0.55 kilogram-0.65 kilogram of serpentine；Above-mentioned do not add serpentine before in molten iron silicone content be 0.08%-0.20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310310634.2A CN103388043B (en) | 2013-07-23 | 2013-07-23 | Converter low silicon smelting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310310634.2A CN103388043B (en) | 2013-07-23 | 2013-07-23 | Converter low silicon smelting method |
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| Publication Number | Publication Date |
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| CN103388043A CN103388043A (en) | 2013-11-13 |
| CN103388043B true CN103388043B (en) | 2016-09-07 |
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| CN201310310634.2A Active CN103388043B (en) | 2013-07-23 | 2013-07-23 | Converter low silicon smelting method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1250813A (en) * | 1998-12-08 | 2000-04-19 | 承德钢铁集团有限公司 | Method for reforming slags system of smelting steel with low-Si molten iron or semisteel by using slag inclusion of converter as slag modifier |
| CN1718793A (en) * | 2005-07-11 | 2006-01-11 | 台州盛世环境工程有限公司 | Fusing agent used under high temperature fused state |
| CN101353750A (en) * | 2007-07-23 | 2009-01-28 | 宝山钢铁股份有限公司 | Refining method by in situ extraction of inclusion content in melting steel |
| CN102776313A (en) * | 2012-08-20 | 2012-11-14 | 武汉钢铁(集团)公司 | Method for smelting high-phosphorus steel by low-temperature low-silicon molten iron in converter |
-
2013
- 2013-07-23 CN CN201310310634.2A patent/CN103388043B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1250813A (en) * | 1998-12-08 | 2000-04-19 | 承德钢铁集团有限公司 | Method for reforming slags system of smelting steel with low-Si molten iron or semisteel by using slag inclusion of converter as slag modifier |
| CN1718793A (en) * | 2005-07-11 | 2006-01-11 | 台州盛世环境工程有限公司 | Fusing agent used under high temperature fused state |
| CN101353750A (en) * | 2007-07-23 | 2009-01-28 | 宝山钢铁股份有限公司 | Refining method by in situ extraction of inclusion content in melting steel |
| CN102776313A (en) * | 2012-08-20 | 2012-11-14 | 武汉钢铁(集团)公司 | Method for smelting high-phosphorus steel by low-temperature low-silicon molten iron in converter |
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| CN103388043A (en) | 2013-11-13 |
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Denomination of invention: Converter low silicon smelting process Effective date of registration: 20210908 Granted publication date: 20160907 Pledgee: Industrial and Commercial Bank of China Limited Qihe sub branch Pledgor: Shandong Laigang Yongfeng Steel and Iron Co.,Ltd. Registration number: Y2021980009020 |