... are mullite and corundum phases. On the basis of the clay brick high alumina bricks, changing the AI2O3/SiO2 ratio increased AI2O3 content, and ... to clay. Thus, a variety of thermal equipment, parts of the original with silica brick, or brick can be replaced with ... brick. With high alumina bricks to replace the brick and silica brick, can increase the service life of thermal equipment. Currently, it ...