CN103388043A - A converter low-silicon smelting method - Google Patents
A converter low-silicon smelting method Download PDFInfo
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- CN103388043A CN103388043A CN2013103106342A CN201310310634A CN103388043A CN 103388043 A CN103388043 A CN 103388043A CN 2013103106342 A CN2013103106342 A CN 2013103106342A CN 201310310634 A CN201310310634 A CN 201310310634A CN 103388043 A CN103388043 A CN 103388043A
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- serpentine
- molten iron
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Abstract
The invention relates to a converter low-silicon smelting method. The method is characterized in that serpentine having silicon dioxide and magnesium oxide as main components is added in the early stage of smelting to increase the silicon content in molten iron to 0.20%-0.30%, addition of the serpentine is equivalent to an increase of the silicon content in the molten iron, and calcium oxide in lime directly combines the silicon dioxide in the serpentine to form slag. According to the method, the serpentine is added in the early stage of smelting, and the calcium oxide in the lime directly combines the silicon dioxide in the serpentine to form the slag, and therefore a slag insolubilization phenomenon, a process dryness returning phenomenon and a phenomenon of steel adhesion to oxygen lances are solved, and the magnesium oxide in the serpentine has functions of protecting furnace linings, increasing the magnesium oxide content in the slag, enhancing an effect of furnace protection by slag splashing, and prolonging service lifetime of the converter.
Description
Technical field
The invention belongs to steelmaking technical field.
Background technology
In the converter smelting technical field, silicone content (0.08%-0.20%) is low in molten iron, occurs that easily slagization do not open, and dried phenomenon appears returning in little being very easy to of the quantity of slag, has increased metal loss; The wash away aggravation of Oxygen Flow to furnace lining, steel adhesion on oxygen lance seriously are difficult to cleaning, have increased labor capacity; Increased difficulty in daily smelting.
Summary of the invention
The purpose of this invention is to provide a kind of converter low silicon smelting method, low to solve prior art molten iron silicon, easily occur slagization do not open the quantity of slag little be very easy to occur returning do phenomenon and increased metal loss, the wash away aggravation of Oxygen Flow to furnace lining, steel adhesion on oxygen lance seriously is difficult to cleaning, has increased labor capacity.The problems such as difficulty have been increased in daily smelting.
The technical solution adopted for the present invention to solve the technical problems is to add serpentine take silicon-dioxide and magnesium oxide as main component at initial smelting period, silicone content in molten iron is increased to 0.20%-0.30%, add serpentine to be equivalent to increase the content of silicon in the molten iron, the calcium oxide in lime directly and the silica bound slagging in serpentine.Its concrete formula is:
Rhombspar: 13-15 kg/ton steel, molten iron: 900-1030 kg/ton steel, lime: 36-43 kg/ton steel, serpentine: every increase by 0.01% silicon needs to add 0.55 kilogram-0.65 kilogram, serpentine.
It is above-mentioned that not add before serpentine silicone content in molten iron be 0.08%-0.20%.
After the increase serpentine, the interior silicone content of molten iron is 0.2%-0.30%.
Adopting positively effect of the present invention is that refining adds serpentine in earlier stage; thereby the calcium oxide in lime directly and the silica bound slagging in serpentine solved slagization and do not opened; process is returned and is done phenomenon and steel adhesion on oxygen lance phenomenon; magnesium oxide in serpentine can play and protect the effect of furnace lining to increase content of magnesia in slag simultaneously; the slag splashing effect is strengthened, and life of converter is extended.
Embodiment
Embodiment 1
In the molten iron of having bought on market, silicone content is 0.10%, add serpentine take silicon-dioxide and magnesium oxide as main component at initial smelting period, silicone content in molten iron is increased to 0.22%, add serpentine to be equivalent to increase the content of silicon in the molten iron, the calcium oxide in lime directly and the silica bound slagging in serpentine.Its concrete formula is: rhombspar: 13 kg/ton steel, molten iron: 950 kg/ton steel, lime: 37 kg/ton steel, serpentine: 7.2 kilograms.
Wherein increasing after serpentine silicone content in molten iron is 0.22%.
Its smelting process is same as the prior art.
Embodiment 2
In the molten iron of having bought on market, silicone content is 0.15%, add serpentine take silicon-dioxide and magnesium oxide as main component at initial smelting period, silicone content in molten iron is increased to 0.25%, add serpentine to be equivalent to increase the content of silicon in the molten iron, the calcium oxide in lime directly and the silica bound slagging in serpentine.Its concrete formula is: rhombspar: 14 kg/ton steel, molten iron: 990 kg/ton steel, lime: 40 kg/ton steel, serpentine: 6 kilograms.
Wherein increasing after serpentine silicone content in molten iron is 0.25%.
Its smelting process is same as the prior art.
Embodiment 3
In the molten iron of having bought on market, silicone content is 0.17%, add serpentine take silicon-dioxide and magnesium oxide as main component at initial smelting period, silicone content in molten iron is increased to 0.28%, add serpentine to be equivalent to increase the content of silicon in the molten iron, the calcium oxide in lime directly and the silica bound slagging in serpentine.Its concrete formula is: rhombspar: 14.5 kg/ton steel, molten iron: 1020 kg/ton steel, lime: 42 kg/ton steel, serpentine: 6.93 kilograms.
Wherein increasing after serpentine silicone content in molten iron is 0.28%.
Its smelting process is same as the prior art.
Claims (1)
1. converter low silicon smelting method, it is characterized in that adding serpentine take silicon-dioxide and magnesium oxide as main component at initial smelting period, silicone content in molten iron is increased to 0.20%-0.30%, add serpentine to be equivalent to increase the content of silicon in the molten iron, the calcium oxide in lime directly and the silica bound slagging in serpentine; Its concrete formula is: rhombspar: 13-15 kg/ton steel, and molten iron: 900-1030 kg/ton steel, lime: 36-43 kg/ton steel, serpentine: every increase by 0.01% silicon needs to add 0.55 kilogram-0.65 kilogram, serpentine; It is above-mentioned that not add before serpentine silicone content in molten iron be 0.08%-0.20%.
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| Application Number | Priority Date | Filing Date | Title |
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| 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 |
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| CN201310310634.2A CN103388043B (en) | 2013-07-23 | 2013-07-23 | Converter low silicon smelting method |
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| CN103388043A true CN103388043A (en) | 2013-11-13 |
| CN103388043B 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 |
Non-Patent Citations (1)
| Title |
|---|
| 云正宽: "《冶金工程设计》", 31 July 2006, article "工艺设计 第2册", pages: 68 * |
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| CN103388043B (en) | 2016-09-07 |
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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 |