Refractory castable for ladle

Abstract

The invention provides a refractory castable for a ladle. The refractory castable is prepared by mixing a castable matrix and a proper amount of additive, wherein the castable matrix is composed of the following components in percentage by weight: 50-75% of high-aluminum particles, 10-20% of corundum powder, 1-10% of zinc-aluminum spinel powder, 1-20% of fine fused magnesia powder and 1-7% of silicon micropowder; the additive is composed of the following components in percentage by weight: 0-1% of fine aluminum oxide powder, 0.1-0.5% of fine zirconium silicate powder, 0.1-0.2% of metal rhenium powder, 0.2-3% of refractory steel fiber, 0.03-0.3% of anti-explosion fiber and 0-0.3% of sodium tripolyphosphate. The refractory castable for the ladle is long in service life, strong in slag resistance, certain in desulfuration effect, low in production cost, suitable for a ladle with meta-alkaline slag and a ladle with relatively-high-viscosity acidic slag, and capable of eroding the ladle to reduce bonded slag.

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 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, so they are used by some m...

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.

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