Oxide-coated modified homogenized bauxite castable and preparation method thereof

Abstract

The invention relates to the field of refractory material preparation, particularly to an oxide-coated modified homogenized bauxite castable, which is prepared from the following raw materials in parts by weight: 30-50 parts of homogenized bauxite, 23-35 parts of brown fused alumina, 5-8 parts of silicon carbide, 8-15 parts of spinel powder rich in aluminum and magnesium, 6-10 parts of alumina micro-powder, 2-5 parts of pure calcium aluminate cement, 1.5-9.5 parts of silicon nitride, 1-3 parts of silicon powder, 0.1-0.5 part of aluminum powder, 1-3 parts of silicon dioxide micro-powder, 0.05-0.12 part of organic fiber, 2-4 parts of graphite, 0.5-3 parts of Carbores P, 0.2-0.5 part of a water reducing agent, 3-9 parts of water and 3-5 parts of a nano aluminum hydroxide sol suspension (calculated as a dry material amount) used as a coating material. According to the invention, the erosion and permeation of molten steel and slag components to a material are reduced, and the service life of the castable is prolonged.

Description

technical field [0001] The invention relates to the field of refractory material preparation, in particular to an oxide-coated modified homogeneous alumina castable and a preparation method thereof. Background technique [0002] Refined ladle lining refractory materials are in direct contact with high-temperature molten steel and slag during long-term use, and the use environment is complex and harsh, and will suffer serious damage. The volume effect caused by the separation and combination will cause erosion and damage to the refractory castable, which requires regular replacement and maintenance, and the cost of use is high. Therefore, it is necessary to develop a material with low erosion and penetration of molten steel and slag components. Castable with long service life. Contents of the invention [0003] The invention provides an oxide-coated modified homogenized bauxite castable and a preparation method thereof, aiming at reducing the erosion and penetration of mol...

AI Technical Summary

Problems solved by technology

[0002] Refining ladle lining refractory materials are in direct contact with high-temperature molten steel and slag during long-term use, and the use environment is complex and harsh, and will suffer serious damage. The volume effect caused by the separation and combination will cause erosion and damage to the refractory castable, which requires regular replacement and maintenance, and the cost of use is high. Therefore, it is necessary to develop a kind of molten steel and slag composition that has low erosion and penetration of materials. Castables with a long service life