A kind of erosion-resistant castable for ladle and using method thereof

Abstract

An erosion-resistant castable for a ladle and a use method thereof. The technical solution is: 45~65wt% corundum particles, 10~25wt% corundum fine powder, 10~20wt% aluminum magnesium spinel, 3~5wt% aluminate cement and 4~8wt% active Alumina micropowder is used as raw material, plus 0.1~0.3wt% of polycarboxylic acid dispersant and 0.1~5wt% of micron-sized magnetic particles, mixed, and then added with 4~5wt% of water, stirred, poured and molded , baked to obtain a castable green body. The mass ratio of micron-sized magnetic particles: tert-butanol is 1: (1-3), and the mixture is evenly stirred to obtain the magnetic particle coating. Then apply the magnetic particle paint on the surface of the castable green body, the coating thickness of the magnetic particle paint is 0.1~1mm, and then bake it at 80~110°C for 20~24 hours to obtain the corrosion resistant Castable. The product produced by the invention has the characteristics of being able to clean molten steel, having good slag resistance, corrosion resistance and long service life.

Description

technical field [0001] The invention belongs to the field of castable technology. In particular, it relates to an erosion-resistant pouring material for a ladle and a use method thereof. Background technique [0002] Refractory material is the basic material of high temperature technology, and it has a very close relationship with the development of high temperature technology, especially with the development of iron and steel industry. In the field of metallurgical industry, refractory materials not only take on the role of containers, but also participate in the physical and chemical reactions of the smelting process, which has an important impact on the quality of steel. About 50~60% of the refractory damage in furnace lining bricks in the metallurgical industry is caused by various slag erosion, such as various steelmaking furnace linings, ladle working linings, etc. Therefore, refractory materials in contact with slag are affected by the erosion and penetration of sla...

AI Technical Summary

Problems solved by technology

Although this product can reduce the degree of reaction between ladle lining material and molten slag, it does not have the function of cleaning molten steel

"A refractory castable for steel ladle" (CN104418598A) patented technology, using high alumina clinker, bauxite cement, silicon micropowder, alumina and fused magnesia as raw materials to prepare a refractory castable for steel ladle, the prepared Although refractory castables for steel ladles have the advantage of low cost, but relying solely on the slag resistance of refractory raw materials, the castables do not have ideal slag resistance and their service life is poor

[0004] In short, the castables for ladles in the prior art are easy to pollute molten steel, have poor ability to clean molten steel, have unsatisfactory slag resistance, and have poor service life.