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Calcium carbide ferro-aluminium alloy used for smelting steel, and preparation method thereof

A calcium carbide aluminum, iron alloy technology, applied in the field of metallurgy and chemical industry, can solve the problems of high price of calcium metal, use and promotion, large fire consumption, etc.

Inactive Publication Date: 2012-12-19
谢应旭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of calcium metal and high fire consumption, the cost of the alloy is high and cannot be popularized.
Due to the above reasons, the technology has not yet been used and promoted in actual production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Ratio of ingredients: 100 kg of aluminum, 30 kg of scrap steel. Put the above charge into the intermediate frequency electric furnace, smelt for about 1 hour, the furnace temperature is about 1300 ℃, the charge is completely melted, then put 50 kg of calcium carbide water into the molten aluminum and iron, and then send electricity to raise the temperature and stir to combine, remove the slag and cast it out of the furnace , made of calcium carbide aluminum iron alloy. Assay composition: Al60%, Ca15%, C3%, Fe20%. Among the impurities, Si1.6%, S, P0.03%, other impurities have not been tested.

Embodiment 2

[0013] A weighing scale is installed under the water outlet of the calcium carbide furnace for measurement, and a melting furnace is placed on the weighing scale. Calcium carbide water is put into the furnace, according to the weight of calcium carbide water, aluminum and iron are added according to the ratio. The volume of the melting furnace is set according to the output of each furnace of calcium carbide furnace. This time, the calcium carbide furnace produces about 5 tons of calcium carbide per furnace, and the furnace in front of the furnace is a 20-ton intermediate frequency induction furnace.

[0014] The calcium carbide water is put into the intermediate frequency furnace, and the weight is 4816 kg. After all the calcium carbide water is put into the intermediate frequency furnace, the temperature is raised by power transmission. Then put 7000 kg of aluminum and 4000 kg of steel scrap into the intermediate frequency melting furnace according to the alloy composition ...

Embodiment 3

[0018] A steel plant has a 150-ton converter to produce hot-rolled thin board (container board). The original deoxidized aluminum is 450 kg, and the denaturant-calcium cored wire is 200 meters. With 400 kilograms of calcium aluminum iron carbide of embodiment 1, do not add calcium cored wire. C0.051% in steel, an increase of 0.01%. S0.03%, P0.03%, O30PPm, no denaturant - calcium cored wire. Through the test of the steel factory, the deoxidation and desulfurization of calcium carbide aluminum iron is better than that of aluminum, and there is no need to feed calcium wire. Although the carbon slightly increases, it does not affect the quality of the steel. Using calcium aluminum iron instead of aluminum deoxidation and desulfurization can not only ensure the quality of steelmaking, but also reduce the cost of steelmaking.

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PUM

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Abstract

The invention relates to a calcium carbide ferro-aluminium alloy used for smelting steel, and a preparation method thereof. The calcium carbide ferro-aluminium alloy employs calcium carbide, aluminium, ferrum and the like as raw materials, is produced by a remelting perrin process, and is used for deoxidation and desulphurization of smelting the steel. The calcium carbide ferro-aluminium alloy comprises the following components of, by mass, 20-60% of aluminium, 5-40% of calcium, 1-15% of carbon, and the balance being ferrum and inevitable impurities. The calcium carbide ferro-aluminium alloy has good effects of deoxidation and desulphurization, and can reduce cost for smelting the steel while guaranteeing the quality of the steel.

Description

technical field [0001] The invention is a calcium carbide aluminum-iron alloy used for deoxidation, desulfurization and impurity denaturant in steelmaking, and belongs to the technical field of metallurgy and chemical industry. Background technique [0002] Deoxidation of aluminum for steelmaking, its deoxidation product Al 2 o 3 Solid inclusions with high melting points. To turn it into calcium aluminate with a low melting point, it is necessary to denature it with calcium. Calcium metal is not only expensive, but also has a very low utilization rate. It is very meaningful to use calcium carbide in calcium carbide to replace calcium metal, and to alloy calcium carbide with aluminum and iron for deoxidation in steelmaking while reducing impurities. thing. [0003] Calcium carbide is an inorganic compound. It is mainly used as a raw material for chemical production, and can also be used as a desulfurizer for steelmaking. Some steel mills used calcium carbide instead of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/04
Inventor 谢应旭
Owner 谢应旭
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