LOW CEMENT CORROSION-RESISTIVE UNSHAPED REFRACTORIES

摘要

Disclosed is an unshaped refractory containing a refractory mixture of alumina (Al2O3)_{and silicon carbide (SiC) to which alumina cement, zircon and an alumina binder are added. The refractory exhibits high strength and density as well as significantly improved corrosion resistance, which is due to the reaction of zircon with calcium oxide (CaO), greatly suppressing corrosion by slag. Use of the alumina binder provides fast drying and strength sufficient for handling. Since shrinkage hardly occurs after heat treatment and low porosity and high strength can be obtained, the refractory is very suitable for use, in particular, a gasifier.}