（一）Use：
Application of corundum and corundum-mullite -Al₂O₃ ceramic ball and ceramic lining brick: Since the series products have excellent characteristics of high intensity, high rigidity, high wear resistance, high specific gravity, small size, high temperature resistance and corrosion resistance. The corundum and corundum-mullite -Al₂O₃ ceramic ball and ceramic lining brick made by our company are applicable to various fine crushing equipment as grinding medium and cylinder internal lining. They are better than other grinding media in high wearing efficiency, low wear and no pollution. Therefore they are widely used in glaze, paint, ceramics, enamel, glass, oil refining, dye printing and chemical manufacturing fields.