Silica corundum brick

Abstract

The invention relates to a silica corundum brick, which can effectively improve the strength, the wear resistance and the anti-erosion ability of a product, prolong the service life of the product, improve the thermal shock stability of the product, overcome the phenomenon that a lining brick is burst and stripped, adjust the linear change rate of the product, enable the product to be closely combined with equipment, and avoid the phenomenon that the lining brick is loosened and falls off. A method comprises the steps that according to weight percentages, 15 to 20 percent of bauxite clinker of which the Al2O3 mass content is larger than 87 percent and the particle size is smaller than or equal to 4mm and larger than 2mm, 35 to 40 percent of bauxite clinker of which the Al2O3 mass content is larger than 87 percent and the particle size is smaller than or equal to 2mm and larger than 1mm, 3 to 5 percent of zircon sand powder, 15 to 18 percent of silicon carbide (SiC) powder of which theSiC mass content is larger than 97 percent, 10 to 15 percent of fused white corundum powder, 5 to 8 percent of sialon powder, 4 to 6 percent of kyanite powder and 6 to 10 percent of soft refractory clay are used as basic raw materials, a binding agent is further added to the basic raw materials, and then the silica corundum brick is manufactured. The silica corundum brick disclosed by the invention has the advantages of advanced method easy to operate, high quality, high yield and high raw material utilization rate, can be effectively used at parts with large temperature changes in large and medium rotary kilns and other heat equipment having high requirements for the anti-scouring performance, the wear-resistant performance and the erosion-resistant performance.

Description

technical field [0001] The invention relates to a refractory material, especially a silicon corundum brick. Background technique [0002] The current status of refractory materials: First, the waste of resources is serious, and there are fewer and fewer high-grade raw materials that can be mined; second, the process quality cannot meet the needs of continuous improvement and innovation of the industrial kiln working environment. Especially in the large and medium-sized rotary kilns and other thermal equipment in the cement, metallurgy, lime and other product industries, the refractory products of high-quality high-alumina series refractory products are taken as an example in the sections or parts with high requirements for erosion resistance, wear resistance and erosion resistance. , High porosity, low compressive strength, large line change, low load softening temperature and other factors lag far behind the development of large and medium-sized metallurgical building mater...

AI Technical Summary

Problems solved by technology

The overcapacity and shortened service life of low-grade refractory products not only waste resources too much and pollute the environment, but also cause equipment losses and cost increases to the enterprises that use them; The thermal expansion coefficient and poor thermal shock stability fundamentally restrict its application range and cannot meet the complex working conditions of various industrial furnaces. Therefore, the innovation of refractory materials has become a common concern of thermal equipment users and refractory companies. Focus

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