Metallic composite low-carbon magnesium carbon slag line brick and preparation method thereof

Abstract

The invention relates to a refractory material line brick for steelmaking and the preparation method of the refractory material line brick, in particular to a metallic composite low-carbon magnesium carbon slag line brick and the preparation method of the metallic composite low-carbon magnesium carbon slag line brick. The composite low-carbon magnesium carbon slag line brick is prepared by pressing and moulding the following components in percentage by weight: 85%-95% of magnesia, 2.0%-4.5% of graphite, 1.0%-6.0% of metallic steel fibre, 0.5%-2.0% of phenolic resin, and 1.5%-5.0% of metal deoxidizer, wherein the metal deoxidizer is composed of metal aluminium powder and silicon powder, wherein the silicon-aluminium ratio is 2.0: 1-3.0: 1. The method for preparing the metallic composite low-carbon magnesium carbon slag line brick comprises the steps of mixing, ageing the mixture, pressing and moulding, and curing to obtain the finished product. The metallic composite low-carbon magnesium carbon slag line brick has the advantages of improving the thermal shock stability and high-temperature strength of the low-carbon magnesium carbon brick.

Description

technical field [0001] The invention relates to a refractory line brick used for steelmaking and a preparation method thereof. Background technique [0002] With the continuous progress of the society and the rapid development of the iron and steel industry, the requirements for the quality of steel varieties are continuously improved, making the working conditions of various refining furnace linings tend to be high temperature, the heat load time is prolonged, combined with oxygen blowing, argon blowing and vacuuming, Especially in the case of smelting low-carbon steel, ultra-low carbon steel and killed steel, the commonly used magnesia-chrome bricks, alumina-magnesia-carbon bricks, magnesia-dolomite bricks, castables, ordinary magnesia-carbon bricks, etc., can no longer meet the requirements of steel Quality improvement and smelting speed requirements. [0003] At present, refining furnace steelmaking is also known as out-of-furnace refining, and there are more than 30 me...

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Problems solved by technology

[0011] In order to solve the above-mentioned technical problems such as high carbon content of ordinary magnesia-carbon bricks, pollution of molten steel, and low service life, the purpose of the present invention is to provide a metal composite low-carbon magnesia-carbon slag wire brick, which improves the quality of low-carbon magnesia-carbon bricks. Excellent thermal shock stability and high temperature strength

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