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Aluminum calcium composite deoxidizer

A composite deoxidizer and aluminum-calcium technology, applied in the field of metallurgy, can solve the problems of low molten steel purity and high production cost, and achieve the effects of improving molten steel purity, low production cost, and reducing total oxygen content and inclusion amount.

Inactive Publication Date: 2013-01-02
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In order to solve the above problems, the object of the present invention is to provide an aluminum-calcium composite deoxidizer, which can avoid excessively low aluminum alloy yields resulting in high production costs and insufficient calcium content to fully remove three Aluminum oxide inclusions lead to low purity of molten steel, and at the same time avoid the phenomenon of removing aluminum oxide inclusions and bringing in other impurities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take the following weight percentage components, C: 0.43%, Al: 49.83%, Ca: 12.7%, Si: 0.98%, S: 0.041%, P: 0.045%, and the balance of Fe is uniformly mixed, and the dry pressing method is used to dry The operation steps of the pressing method: 1) mix the powder ingredients according to the proportion; 2) put the mixed ingredients into a pressing machine for pressing and molding to obtain the aluminum-calcium composite deoxidizer.

Embodiment 2

[0028] Get the following weight percentage composition, C: 0.48%, Al: 40.98%, Ca: 10.1%, Si: 0.87%, S: 0.044%, P: 0.032%, Fe surplus is uniformly mixed, all the other steps are the same as embodiment 1, prepare Obtain aluminum-calcium composite deoxidizer.

Embodiment 3

[0030] Get the following weight percentage composition, C: 0.36%, Al: 46.02%, Ca: 14.9%, Si: 0.69%, S: 0.038%, P: 0.025%, Fe surplus is uniformly mixed, all the other steps are the same as embodiment 1, prepare Obtain aluminum-calcium composite deoxidizer.

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PUM

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Abstract

The invention involves an aluminum calcium composite deoxidizer which is used for treating molten stainless steel. The aluminum calcium composite deoxidizer is characterized in including (by weight percentage) calcium more than 10% and lower than or equal to 15%, aluminum more than 40% and lower than or equal to 50%, carbon more than 0 and lower than or equal to 0.50%, phosphorus more than 0 and lower than or equal to 0.045%, sulfur more than 0 and lower than or equal to 1.00%, and iron in balance. The aluminum calcium composite deoxidizer is used after the reduction stage of stainless steel smelting, for deep deoxidation treatment to the molten stainless steel, has lower manufacture cost, and can reduce total oxygen content and impurity content in the stainless steel slab and improve the purity of the molten steel.

Description

technical field [0001] The invention belongs to the field of metallurgy, specifically relates to the technical field of composite deoxidizers for stainless steel smelting in iron and steel metallurgical industry production, and more specifically relates to an aluminum-calcium composite deoxidizer applied to stainless steel smelting. Background technique [0002] Stainless steel is characterized by high chromium content and low carbon content. In recent years, technological development and industrial progress have required higher and higher corrosion resistance of stainless steel, resulting in great changes in the variety structure of stainless steel. The use of low-carbon, ultra-low carbon, ultra-pure ferrite and other stainless steels has gradually accounted for a considerable proportion. As we all know, the theoretical basis of stainless steel smelting is the thermodynamic equilibrium of the oxidation reaction of carbon and chromium. When carbon and chromium exist in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06
Inventor 池和冰邵世杰徐文杰顾学红
Owner BAOSHAN IRON & STEEL CO LTD
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