| abstract |
The invention belongs to the technical field of refractory materials, and in particular relates to a magnesia-alumina spinel brick for co-processing cement kilns and a preparation method and application thereof. The magnesia-alumina spinel brick is made of flotation magnesia, high-purity magnesia, and fused magnesia-aluminum spinel as main raw materials, and is prepared by high temperature treatment; the flotation magnesia, high-purity magnesia, fused magnesia The mass ratio of aluminum spinel is (54-65):(18-28):(12-25). The magnesia-alumina spinel brick of the present invention not only has suitable normal temperature compressive strength and load softening temperature, but also has higher bulk density and lower apparent porosity, higher sintering densification degree, and can effectively reduce Penetration of aggressive substances, better corrosion resistance; at the same time, it also has higher thermal shock stability performance, high temperature flexural strength and high temperature toughness; the magnesia-alumina spinel brick not only has excellent performance, but also has low cost, and its high The cost-effectiveness makes it more widely used. |