CN1223302A - Desulfurizing agent for smelting iron and steel - Google Patents
Desulfurizing agent for smelting iron and steel Download PDFInfo
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- CN1223302A CN1223302A CN 98113413 CN98113413A CN1223302A CN 1223302 A CN1223302 A CN 1223302A CN 98113413 CN98113413 CN 98113413 CN 98113413 A CN98113413 A CN 98113413A CN 1223302 A CN1223302 A CN 1223302A
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- aluminium
- alkaline earth
- steel
- desulfurizing agent
- earth metal
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a desulfurizing agent for smelting steel and iron. Said desulfurizing agent contains aluminium powder, alkaline earth metal salt and/or alkaline earth metal oxide, organic adhesive and by-product aluminium dust produced in the course of production of electrolytic aluminium. Said invention not only is low in cost and economic in use, but also the melting point of the slag produced when said invention is used is lower, and the fluidity of the slag is good, so that the the slag is easy to be removed so as to raise the service life of the ladle. Besides, the organic adhesive of the said invention not only possesses the cementing action, but also can form the partial reduced atmosphere environment after it is gasified so as to prevent the molten steel from re-oxidizing.
Description
The present invention relates to a kind of desulfurizing agent for smelting iron and steel.
Desulfurizing agent for smelting iron and steel of the prior art is owing to easily producing dystectic slag in use, and its flowability is poor, removing is difficult, and the cost of such sweetening agent is higher, uses uneconomical.
The object of the present invention is to provide a kind of cost lower, use economic sweetening agent, thus the slag fusing point that this sweetening agent was produced when using lower, mobile better, be convenient to remove the work-ing life of improving steel teeming ladle.
Technical scheme of the present invention is, a kind of desulfurizing agent for smelting iron and steel, and it comprises aluminium powder, alkaline earth salt and/or alkaline earth metal oxide, and it also contains by product aluminium ash (groove mud) and organic binder bond in the electrolytic aluminum process.
And, contain 2～10% aluminium, 50～70% aluminum oxide and 20～30% Calcium Fluoride (Fluorspan), sodium aluminum fluoride, aluminum fluoride mixture in the above-mentioned aluminium ash.
And sweetening agent of the present invention contains (weight percentage) aluminium ash 25～60%, activated aluminum powder 2～10% alkaline earth salts and/or alkaline earth metal oxide 25～60%, organic binder bond 1～5%.
And above-mentioned organic binder bond is carboxymethyl cellulose and/or starch.
In technical scheme of the present invention owing to add by product aluminium ash (groove mud) in the very cheap electrolytic aluminum process, and include mixtures such as the Calcium Fluoride (Fluorspan) that can reduce the slag fusing point, sodium aluminum fluoride, aluminum fluoride in the aluminium ash, thereby not only make cost of the present invention lower, use economical, and the slag fusing point that the present invention is produced when using lower, mobile better, be convenient to remove, thereby the work-ing life of having improved steel teeming ladle.Organic binder bond among the present invention is except that playing cohesive action in addition, and also gasifiable back forms the environment of partial reduction atmosphere, prevents that molten steel from reoxidizing.
Provide embodiments of the invention (being weight percentage) below:
Embodiment one: aluminium ash 26%, aluminium powder 10%, calcium oxide or Calcium Fluoride (Fluorspan) 60%, carboxymethyl cellulose or starch 4%;
Embodiment two: aluminium ash 35%, aluminium powder 9%, calcium oxide or Calcium Fluoride (Fluorspan) 53%, carboxymethyl cellulose or starch 3%;
Embodiment three: aluminium ash 46%, aluminium powder 4%, calcium oxide or Calcium Fluoride (Fluorspan) 49%, carboxymethyl cellulose or starch 1%;
Embodiment four: aluminium ash 52%, aluminium powder 5%, calcium oxide or Calcium Fluoride (Fluorspan) 41%, carboxymethyl cellulose or starch 2%;
Embodiment five: aluminium ash 60%, aluminium powder 2%, calcium oxide or Calcium Fluoride (Fluorspan) 34%, carboxymethyl cellulose or starch 4%;
Embodiment six: aluminium ash 60%, aluminium powder 10%, calcium oxide or Calcium Fluoride (Fluorspan) 25%, carboxymethyl cellulose or starch 5%;
Embodiment seven: aluminium ash 25%, aluminium powder 10%, calcium oxide or magnesium oxide 29%, Calcium Fluoride (Fluorspan) or magnesium fluoride 31%, carboxymethyl cellulose or starch 5% (or 2% carboxymethyl cellulose, 3% starch);
Embodiment eight: aluminium ash 37%, aluminium powder 8%, calcium oxide or magnesium oxide 30%, Calcium Fluoride (Fluorspan) or magnesium fluoride 22%, carboxymethyl cellulose or starch 3% (or 2% carboxymethyl cellulose, 1% starch);
Embodiment nine: aluminium ash 45%, aluminium powder 5%, calcium oxide or magnesium oxide 40%, Calcium Fluoride (Fluorspan) or magnesium fluoride 9%, carboxymethyl cellulose or starch 1% (or carboxymethyl cellulose and starch each 0.5%).
Preparing product of the present invention can or appoint in the ratio among above-mentioned arbitrary embodiment and get composition provided by the present invention and carry out mixing and stirring by required proportioning and can obtain.
Aluminium ash among the present invention is the groove ash in the electrolyzer in the electrolytic aluminum process.Alkaline earth salt among the present invention or alkaline earth metal oxide can be selected according to customer requirements, as select Calcium Fluoride (Fluorspan), calcium silicide, carbide of calcium, magnesium chloride, magnesium oxide, calcium oxide etc. for use.
When the present invention used, it was thrown the people and measures and should calculate according to the sulphur content of going out molten steel, because of multifactor reason also can try out earlier to determine.According to the experience of having used, the input amount of general molten steel per ton is 4～6 kilograms or suitably increases, subtracts.
This product is suitable for the domestic and international external refining that prevails at present most, suitable final desulfurization of molten steel and removal of impurities, and its sweetening effectiveness can reduce by 30% with the sulphur content in the former molten steel through repeatedly practice, reaches as high as 60～70%.Make the sulphur content of the molten steel after its external refining reach lower level.
Claims (4)
1, a kind of desulfurizing agent for smelting iron and steel, it comprises that aluminium powder, alkaline earth salt are or/and alkaline earth metal oxide is characterized in that it also contains by product aluminium ash (groove mud) and organic binder bond in the electrolytic aluminum process.
2, sweetening agent according to claim 1 is characterized in that, contains aluminium, 50～70% aluminum oxide and 20～30% Calcium Fluoride (Fluorspan), sodium aluminum fluoride, the aluminum fluoride mixture of (weight percentage) 2～10% in the aluminium ash.
3, sweetening agent according to claim 2 is characterized in that, it contains (weight percentage) aluminium ash 25～60%, aluminium powder 2～10%, alkaline earth salt and/or alkaline earth metal oxide 25～60%, organic binder bond 1～5%.
4, sweetening agent according to claim 3 is characterized in that organic binder bond is carboxymethyl cellulose and/or starch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113413 CN1223302A (en) | 1998-01-15 | 1998-01-15 | Desulfurizing agent for smelting iron and steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113413 CN1223302A (en) | 1998-01-15 | 1998-01-15 | Desulfurizing agent for smelting iron and steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1223302A true CN1223302A (en) | 1999-07-21 |
Family
ID=5223144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98113413 Pending CN1223302A (en) | 1998-01-15 | 1998-01-15 | Desulfurizing agent for smelting iron and steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1223302A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308464C (en) * | 2000-09-14 | 2007-04-04 | 杰富意钢铁股份有限公司 | Refining agent and refining method |
| CN102534116A (en) * | 2012-01-18 | 2012-07-04 | 大连环球矿产有限公司 | Slag modifier and preparation method and application thereof |
| CN113005262A (en) * | 2021-03-24 | 2021-06-22 | 郭晓俊 | Method for preparing steel-making desulfurizer by using aluminum ash |
-
1998
- 1998-01-15 CN CN 98113413 patent/CN1223302A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308464C (en) * | 2000-09-14 | 2007-04-04 | 杰富意钢铁股份有限公司 | Refining agent and refining method |
| CN102534116A (en) * | 2012-01-18 | 2012-07-04 | 大连环球矿产有限公司 | Slag modifier and preparation method and application thereof |
| CN102534116B (en) * | 2012-01-18 | 2014-06-04 | 大连环球矿产有限公司 | Slag modifier and preparation method and application thereof |
| CN113005262A (en) * | 2021-03-24 | 2021-06-22 | 郭晓俊 | Method for preparing steel-making desulfurizer by using aluminum ash |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |