A kind of refractory castable for ladle

Abstract

The invention provides a refractory castable for ladle, which is formed by mixing a castable base material and an appropriate amount of additives. The components and weight percentages of the castable base material are: 50-75% of high-aluminum material particles , 10-20% of high alumina powder, 1-10% of magnesia-aluminum spinel powder, 1-20% of electro-baked magnesia fine powder, 1-7% of silicon micropowder; the components and weight percentages of the additives are: Alumina fine powder 0-1%, zircon fine powder 0.1-0.5%, heat-resistant steel fiber 0.2-3%, explosion-proof fiber 0.03-0.2%, sodium tripolyphosphate 0-0.3%, sodium hexametaphosphate 0.1- 0.5%. The invention is a refractory castable for ladle with long service life, strong slag resistance, certain desulfurization effect and low production cost. The molten iron ladle of slag makes it corrode and reduces sticky slag. In addition, the alkaline material has a desulfurization effect.

Description

technical field [0001] The invention relates to a refractory castable, in particular to a castable for ladles. Background technique [0002] The existing lining refractories for ladles mainly include clay bricks, three-grade high-alumina bricks, pyrophyllite bricks, Al 2 o 3 -SiC-C brick, Al 2 o 3 -SiC-C castable, Al 2 o 3 -SiC castables, etc. The use of ladles is an important link in the entire production line of a steel company. Whether it is safe and efficient is directly related to whether the production runs smoothly. The refractory materials used in ladles in normal iron and steel plants are mainly shaped refractory materials such as clay bricks and high alumina bricks. There are brick joints and steps, which can easily cause molten iron slag to fall and cause sticky slag. Amorphous refractories are generally made of Al 2 o 3 - SiC-based castables, which can adapt to the operating temperature of the ladle, and have high strength can improve their service life,...

AI Technical Summary

Problems solved by technology

Amorphous refractories are generally made of Al 2 o 3 - SiC-based castables, which can adapt to the operating temperature of the ladle, and have high strength can improve their service life, so they are used by some manufacturers. The disadvantages are that they are easy to oxidize, have poor slag resistance, and are not widely applicable. Poor desulfurization effect, etc.