Alkali-resistant castables are made of high-silica and low-alkali Alkali-resistant ceramic particles. In the course of use, when the alkali gas is eroded, the high-silicon low-aluminum component reacts with the alkali gas to form a high viscosity liquid Phase, attached to the surface of the castable, the formation of enamel-like protective layer, thus preventing the erosion of alkali, put an end to the "alkali crack" phenomenon, its alkali resistance level; and the use of modern ultrafine powder technology, significantly improved its strength; and With the construction of good mobility, construction is simple, simple maintenance and other fine features.z