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Silicon-boron deoxidizer and using method

A technology of silicon boron deoxidizer and deoxidizer, which is applied in the field of steelmaking and refining, and can solve the problem that deoxidizer cannot denitrify and fix nitrogen

Active Publication Date: 2013-03-13
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention discloses a silicon boron deoxidizer with the function of denitrification and nitrogen fixation and its use method, which solves the problem that the current deoxidizer cannot denitrify and fix nitrogen while deoxidizing

Method used

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Embodiment Construction

[0013] The specific embodiment of the present invention is described in detail below; The silicon-boron deoxidizer with denitrification and nitrogen-fixing function provided by the present invention is mainly composed of boron and silicon (percentage by weight), wherein the boron content is 2% to 10%, and the silicon content is 88%. ~98%, the impurity content is controlled to be less than 1.5%, and the particle size of the deoxidizer is required to be 50~100mm.

[0014] In order to ensure the safety of production and the quality of molten steel, the above-mentioned raw materials are baked before use at a temperature of 70°C-150°C for 8-16 hours to make the moisture less than 0.5%. In order to ensure that B in the deoxidizer is not oxidized by the molten steel and play its role in denitrification and nitrogen fixation, the deoxidizer is required to be added within 10-20 minutes before the end of refining after the initial deoxidation of the molten steel; The basicity of the liq...

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PUM

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Abstract

The invention discloses a silicon-boron deoxidizer and a using method, containing: 2-10% of boron, 88%-98% silicon, and less than 1.5% of impurity, wherein the graininess of the deoxidizer is 50-100mm. The raw material is baked under 70-150 DEG C for 8-16h for making moisture less than 0.5%; the deoxidizer is used 10-20min before refining finish; the molten steel temperature is 1550-1620 DEG C, the refining slag alkalinity is 2.0-4.5, and the FeO content in the refining slag is less than 1%; the silicon-boron deoxidizer is added into the steel in the standard of 0.5-4kg / t, and argon stirring is performanced when the deoxidizer is added; and the boron in the deoxidizer of the the invention is used for removing or fixing nitrogen in the steel, resolves the current problem of denitrificationand nitrogen fixation while deoxidation, and deoxidizer per kilogram can remove or fixing 0.05-0.1ppm nitrogen in the steel, thereby achieving the purpose for purifying the steel.

Description

technical field [0001] The invention belongs to the field of steelmaking and refining, and relates to a refining deoxidizer, in particular to a silicon boron deoxidizer with the function of denitrification and nitrogen fixation and a use method thereof. Background technique [0002] In the refining process of steel, generally speaking, the deoxidizer can deoxidize and desulfurize the molten steel. Deoxidizers can be divided into strong deoxidizers and weak deoxidizers according to their deoxidizing ability. The main components are aluminum, titanium, etc., and the deoxidizer with a relatively strong ability to combine oxygen in steel is a strong deoxidizer, such as aluminum deoxidizer, ferro-titanium, etc. The main component is manganese and other deoxidizers with weaker ability to combine with oxygen in steel are weak deoxidizers, such as ferromanganese. At the same time, elements such as magnesium in the deoxidizer also have the ability to desulfurize. [0003] The pate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06
Inventor 郭大勇马成任玉辉李德刚张晓军曹亚丹耿继双常桂华王秉喜薛军
Owner ANGANG STEEL CO LTD