Method for deoxidizing and alloying molten steel

An alloying and molten steel technology, applied in the field of metallurgical technology, can solve the problems of low alloy yield, poor deoxidation effect, and inaccurate calculation of alloy addition amount.
CN101875995AInactive Publication Date: 2010-11-03武钢集团有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
武钢集团有限公司
Publication Date
2010-11-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for deoxidizing and alloying molten steel, comprising the following steps of: firstly, measuring the actual oxygen content of each heat of molten steel; then, accurately calculating alloy amount required by deoxidizing and alloying treatment; and conveying alloys with moderate particle size to molten steel of a ladle through a blowing pipe and inert gas to enable ferroalloys to completely melt before floating to the surface of molten steel so as to achieve the deoxidizing and alloying effects almost without loss. In the invention, the alloy amount is accurately calculated, alloys can be sufficiently stirred in molten steel so that the deoxidizing and alloying effects of alloys are obvious, the oxidation loss in the process of deoxidizing and alloying treatment is also avoided, and the quality of molten steel is greatly improved.
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Description

technical field

[0001] The invention relates to the field of metallurgical technology, in particular to a method for deoxidizing and alloying molten steel. Background technique

[0002] During the smelting process of molten steel, the molten steel contains a large amount of oxygen, and the percentage of oxygen in the molten steel in the converter is 400-600×10 -6 , if the percentage of oxygen in molten steel is not reduced to a certain level (such as 80-10×10 -6 ), will seriously affect the quality and performance of the steel, so the molten steel must be deoxidized and alloyed. The alloys widely used in the existing technology include ferrosilicon, ferromanganese, aluminum iron, silicon calcium (iron), silicon manganese (iron), silicon barium (iron), silicon aluminum (iron) and so on. The alloy contains a certain proportion of silicon, manganese, aluminum, silicon calcium elements, these elements are called deoxidizing elements. At present, the following formula is gener...

Claims

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