Castable refractory composition

摘要

A castable refractory composition may include from 5% to 95% by weight of alumina, aluminosilicate, or mixtures thereof; up to 70% by weight silicon carbide; up to 10% by weight carbon; from 0.1% to 5% by weight alkaline earth metal oxide and/or hydroxide; and from 0.1% to 5% by weight of silica having a surface area of at least about 10 m2/g. The refractory composition may further include no more than 0.5% by weight of cementitious binder, and the refractory composition may not release a significant amount of hydrogen gas upon addition of water. The refractory composition may set on addition of water. An installable refractory lining may be formed using the composition and a method including at least one of casting, self-flowing, wet shotcreeting, rodding, cast-vibrating, spraying, conventional dry gunning, or high density gunning the castable refractory composition, and setting and drying the composition.

主权项

1. A castable refractory composition comprising:
from 5% to 95% by weight of alumina, aluminosilicate, or mixtures thereof; silicon carbide in an amount up to 70% by weight; carbon in an amount up to 10% by weight; from 0.1% to 5% by weight alkaline earth metal oxide and/or hydroxide; and from 0.1% to 5% by weight of silica having a surface area of at least about 10 m2/g, wherein the refractory composition comprises no more than 0.5% by weight of cementitious binder, wherein the refractory composition releases less than 25 cm3 of hydrogen gas per kilogram of wetted castable refractory composition, and wherein the refractory compositions sets on addition of water.