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Silicon-aluminium-calcium composite deoxidant and its preparing method

A composite deoxidizer, silicon-alumina technology, applied in the field of metallurgy, can solve the problems of increased oxidation reaction probability, lower aluminum yield, lower deoxidation effect, etc., to eliminate nozzle blockage, reduce inclusions, and increase yield Effect

Inactive Publication Date: 2005-10-05
张敏修 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, directly adding aluminum to molten steel will increase the probability of reaction between aluminum and oxides in slag, and even roll on the slag surface and oxidation reaction between oxides in slag and the atmosphere, reducing the yield of aluminum, reducing the deoxidation effect, and increasing costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh each raw material (unit: kg): 20 silicon-calcium alloys (containing 55% silicon and 30% calcium), 10 aluminum ingots, 26 ferrosilicon (containing 75% silicon), 44 steel chips. It can be obtained by remelting the above raw materials in an intermediate frequency electric furnace. The percentage content of each component in the obtained product is: 30.5% of silicon, 10% of aluminum, 6% of calcium, and the balance is iron.

Embodiment 2

[0020] Weigh each raw material (unit: kg): 40 silicon-calcium alloys (containing 55% silicon and 30% calcium), 27 aluminum ingots, 23 ferrosilicon (containing 75% silicon), and 10 steel scraps. It can be obtained by remelting the above raw materials in an intermediate frequency electric furnace. The percentage content of each component in the obtained product is: silicon 39.25%, aluminum 27%, calcium 12%, and the balance is iron.

Embodiment 3

[0022] Weigh each raw material (unit: kg): 34 silicon-calcium alloys (containing 55% silicon and 30% calcium), 25 aluminum ingots, 24 ferrosilicon (containing 75% silicon), and 7 steel chips. It can be obtained by remelting the above raw materials in an intermediate frequency electric furnace. The percentage content of each component in the obtained product is: silicon 36.7%, aluminum 25%, calcium 10.2%, and the balance is iron.

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PUM

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Abstract

This invention discloses a new compound deoxidization agent for steel-smelting use, and this agent comprises the following components: silicon 30-42%, aluminum 10-28%, Ca 6-12%, and Te the rest. This invention can fast deoxidize the steel, can effectively remove the impurities in the steel melt to improve the flow ability of steel melt, and advance the quality of the product and the use method is very convenient.

Description

technical field [0001] The invention relates to a composite deoxidizer for steelmaking, in particular to a silicon-aluminum-calcium composite deoxidizer for steelmaking and a preparation method thereof, belonging to the field of metallurgy. Background technique [0002] At present, in the process of steelmaking production, the main measure to reduce inclusions in molten steel is to use aluminum for deoxidation treatment. After deoxidation with aluminum, molten steel will produce Al 2 o 3 inclusions, resulting in solid Al in continuous casting production 2 o 3 The inclusions are deposited on the wall of the nozzle to block the nozzle. For this reason, the molten steel must be treated with calcium in the later stage of smelting to denature the inclusions and improve the nozzle flow. In addition, directly adding aluminum to molten steel will increase the probability of reaction between aluminum and oxides in slag, and even roll on the slag surface and oxidation reaction bet...

Claims

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Application Information

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IPC IPC(8): C21C7/06
Inventor 张敏修李猛王念俊
Owner 张敏修
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