Al2O3-SiO2-SiC-based jet material for foundry ladle

Abstract

The invention relates to an Al2O3-SiO2-SiC-based refractory material, in particular to an Al2O3-SiO2-SiC-based jet material for wet jet construction of a foundry ladle. The Al2O3-SiO2-SiC-based jet material for the foundry ladle comprises the following components in percentage by weight: 45 to 65 percent of sintered mullite, 5 to 15 percent of SiC, 7 to 18 percent of brown aluminium oxide or special-grade alumina, 5 to 10 percent of Al2O3 super-micro powder, 4 to 8 percent of high-aluminum micro powder, 2 to 5 percent of silicon micro powder, 1.5 to 3 percent of calcium aluminate cement, and 6 percent of balance. The granularity of the Al2O3 super-micro powder is leas than or equal to 2 microns; the purity of Al2O3 in the high-aluminum micro powder is more than or equal to 88 percent, and the granularity is less than or equal to 5 microns; and the purity of SiO2 in the silicon micro powder is more than or equal to 92 percent, and the granularity is less than 1 micron. The balance comprises 3 percent of andalusite and 3 percent of cyanite. The jet material has high strength and good thermal shock stability and corrosion resistance, and ensures good self-flowing property and pumping property.

Description

technical field The present invention relates to an Al 2 o 3 -SiO 2 - SiC refractory materials, especially Al for ladle wet spraying construction 2 o 3 -SiO 2 -SiC injection material. Background technique The wet spraying construction of refractory materials can be used not only to construct new refractory linings, but also to repair old linings, and wet spraying construction has many advantages, so this method has been more and more widely used in the iron and steel industry in recent years . The ladle is an important tool for transferring molten iron. When the molten iron is dumped, the lower part of the ladle and the refractory lining at the bottom will be strongly scoured. During the production process, the molten iron contained in the ladle will continue to scour and wear the lining. During slag removal, slag removal and pouring of molten iron, the ladle mouth refractory material is extremely vulnerable to wear. In addition, frequent loading and pouring of molt...

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Problems solved by technology

The goal of this patent is to be used for permanent lining. Although the injection material has achieved high strength, if it is used for working lining, the fine powder combination is unreasonable, and the addition of a large amount of high-alumina fine powder will reduce the erosion resistance of the material

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