Erosion-resistant castable for steel ladle and use method of erosion-resistant castable

Abstract

The invention provides an erosion-resistant castable for a steel ladle and a use method of the erosion-resistant castable. The technical scheme of the erosion-resistant castable is as follows: 45wt%-65wt% of corundum particles, 10wt%-25wt% of fine corundum powder, 10wt%-20wt% of alumina-magnesia spinel, 3wt%-5wt% of aluminate cement and 4wt%-8wt% of activated aluminium oxide micropowder are taken as raw materials, 0.1wt%-0.3wt% of a polycarboxylic acid dispersing agent and 0.1wt%-5wt% of micron-size magnetic particles are also added, the materials are mixed, 4wt%-5wt% of water is further added, all the materials are stirred and subjected to casting moulding, demoulding and roasting, and a castable green body is prepared; the micron-size magnetic particles and tertiary butanol in a mass ration being 1:(1-3) are blended and stirred uniformly, and a magnetic particle coating is obtained; the castable green body is coated with the magnetic particle coating, the coating layer thickness of the magnetic particle coating is 0.1-1 mm, then the castable green body is roasted for 20-24 h at the temperature of 80-110 DEG C, and the erosion-resistant castable for the steel ladle is obtained. The product has the characteristics of being capable of cleaning molten steel, good in slag resistance, resistant to erosion and long in 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.