Ultra-low carbon periclase-spinel-carbon brick for steel ladle and preparing method

Abstract

The invention relates to an ultra-low carbon periclase-spinel-carbon brick for a steel ladle and a preparing method. The ultra-low carbon periclase-spinel-carbon brick is prepared from, by weight, 5-15 parts of fused magnesite with the particle size being larger than or equal to 5 mm and smaller than 8 mm, 5-25 parts of fused magnesite with the particle size being larger than or equal to 3 mm and smaller than 5 mm, 5-25 parts of fused magnesite with the particle size being larger than or equal to 1 mm and smaller than 3 mm, 10-20 parts of fused magnesite with the particle size being smaller than 1 mm, 5-15 parts of fused magnesite fines, 5-20 parts of magnesium aluminate spinel powder, 0-1 parts of carbon powder, 1-3 parts of binding agent and 0-4 parts of additive, wherein the carbon powder and the additive exist in the brick certainly. The ultra-low carbon periclase-spinel-carbon brick has the advantages that the fused magnesite, the magnesium aluminate spinel powder and carbon are used as main raw materials, a small part of carbon powder is used as replacement to ensure that a matrix is not wet by refining slag, and spinel powder high in thermal shock resistance and alkali slag resistance is added to ensure thermal shock resistance of the brick.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to an ultra-low carbon periclase-spinel-carbon brick for a ladle and a preparation method thereof. Background technique [0002] Magnesia-carbon brick is a high-quality refractory material. Because this kind of carbon-containing refractory product has the advantages of high refractoriness, good slag erosion resistance, strong thermal shock resistance and low high temperature creep, it is widely used in electric furnaces, converters and refining furnaces. Widely used, and the service life has been greatly improved. At the same time, magnesia carbon bricks do not need to be fired at high temperature, saving energy, and the production process is simple, so they are quickly popularized and used. Composition control is becoming more and more stringent. For ladles that store molten steel for a long time, the lining materials, especially the ladles used for refining, will po...

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Problems solved by technology

[0002] Magnesia-carbon brick is a high-quality refractory material. Because this kind of carbon-containing refractory product has the advantages of high refractoriness, good slag erosion resistance, strong thermal shock resistance and low high temperature creep, it is widely used in electric furnaces, converters and refining furnaces. Widely used, and the service life has been greatly improved. At the same time, magnesia carbon bricks do not need to be fired at high temperature, saving energy, and the production process is simple, so they are quickly popularized and used. The composition control is becoming more and more strict. For the ladles that store molten steel for a long time, the lining materials, especially the ladles used for refining, will pollute the molten steel, and under the long-term refining conditions, the heat loss of molten steel is more

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