Clay bonded refractory castable is also a more commonly used, although the refractoriness is not higher than high aluminum refractory castable, but the price is relatively cheap, under the action of sodium hacetaphosphate dispersant and coagulant, basically obtain the construction performance, temperature and low temperature strength. Therefore, in the clay-bonded refractory castable, only the dispersant can fully disperse the clay particles to reduce the secretion of clay particles, while sodium hexametaphosphatine can play a good dispersion role in the clay-bonded refractory castable, so that the clay-bonded refractory castable has good fluidity and constructability, so as to ensure its good high temperature performance.