Steel-casting bricks

Abstract

The invention discloses steel-casting bricks. The steel-casting bricks comprise the following components by weight percentage: 1) 76-80% of tabular corundum powder; 2) 13-22% of andalusite fine powder; 3) 6-17% of alpha-Al2O3 ultrafine powder; and 4) 4-4.5% of soft clay powder. The tabular corundum powder consists of 55-65 % of tabular corundum particles and 12-14 % of tabular corundum fine powder, wherein, the content of tabular corundum particles with granularity of -2.5mm is greater than or equal to 85%, the content of tabular corundum fine powder with granularity of -0.05mm is greater than or equal to 87%; the content of andalusite fine powder with granularity of -0.080mm is greater than or equal to 91%, the content of alpha-Al2O3 ultrafine powder with granularity of -4[mu]m is greater than or equal to 92%; the tabular corundum fine powder requires greater than or equal to 98% of Al2O3, and less than or equal to 0.5% of Fe2O3, the andalusite fine powder requires greater than or equal to 57% of Al2O3, and less than or equal to 1.5% of Fe2O3, and the Al2O3 fine powder requires greater than or equal to 99% of Al2O3. The steel-casting brick provided by the invention can be used as molded steel-casting bricks for special alloy steel with ultra-high temperature resistance, high corrosion resistance, high strength and good thermal shock stability.

Description

technical field [0001] The invention belongs to the field of high-quality shaped refractory products of refractory materials, and in particular relates to a poured steel brick for producing high-grade special alloy steel. Background technique [0002] At present, most of the cast steel bricks used in the production of alloy steel are mullite cast steel bricks. Mullite cast steel bricks are made of high-quality bauxite as the main raw material, and a small amount of mullite and alumina are first introduced into the matrix of the bricks. And kaolin, the production process is as follows: the raw materials are crushed and pulverized, mixed with mud, molded, dried, fired, inspected, stored and shipped. The production method has easy-to-obtain raw materials, relatively low production cost, strong corrosion resistance and good thermal shock stability. However, according to user feedback, mullite cast steel bricks are difficult to meet the requirements of ultra-high temperature res...

AI Technical Summary

Problems solved by technology

However, according to user feedback, mullite cast steel bricks are difficult to meet the requirements of ultra-high temperature resistance, high corrosion resistance, high strength and good thermal shock stability for special alloy steel mold casting. For example, German users want to produce higher High-grade alloy steel is needed, and we hope that merchants will develop, produce and provide higher-grade poured steel brick products