Refractory castable for molten iron tank

Abstract

The invention provides a refractory castable for a molten iron tank. The refractory castable comprises the following components in percentage by weight: 50-65 percent of high-alumina particles, 10-30 parts of high-alumina powder, 1-10 percent of quartz sand, 1-20 percent of diaspore clay fine powder, 3-7 percent of calcium aluminate cement, 1-7 percent of silicon fine powder, 0-4 percent of alumina fine powder, 1-3 percent of zirconium silicate powder, 0.2-2 percent of heat-resistant steel fiber, 0.05-0.3 percent of metal aluminum powder and 0-0.3 percent of sodium tripolyphosphate. The refractory castable for a molten iron tank has the advantages of long service life, high slag resistance and low production cost, is suitable for a molten iron tank for receiving acid slag with high viscosity, is prevented from being eroded, and contributes to reducing adhesive slag.

Description

technical field [0001] The invention relates to a refractory castable, in particular to a castable for ladles. Background technique [0002] At present, the refractory materials used for the lining of ladles mainly include clay bricks, three-grade high-alumina bricks, pyrophyllite bricks, Al2O3-SiC-C bricks, and Al2O3-SiC-C castables. The use of hot metal tanks is an important part of the normal operation of the entire production line of a steel company. Whether it can run safely and efficiently is directly related to whether the production runs smoothly. Usually, the refractory materials used in iron ladles in iron and steel plants are mainly shaped refractory materials such as clay bricks and high alumina bricks. There are weak links such as brick joints, which can easily lead to sticky slag. Amorphous refractory materials are generally castable materials mainly made of Al2O3-SiC-C. This material can adapt to the operating temperature of the molten iron tank, and its high...

AI Technical Summary

Problems solved by technology

Usually, the refractory materials used in hot metal tanks in iron and steel plants are mainly shaped refractory materials such as clay bricks and high alumina bricks, and there are weak links such as brick joints, which can easily lead to sticky slag

Amorphous refractory materials are generally castable materials mainly made of Al2O3-SiC-C. This material can adapt to the operating temperature of the molten iron tank, and its high strength can improve its service life. Therefore, some manufacturers currently use it. The disadvantage is that it is easy to oxidize , poor slag resistance, poor wide applicability, poor desulfurization effect, etc.