Alumina ceramic ball is widely used in petroleum, chemical, fertilizer, natural gas and environmental protection industries, as a catalyst in the reactor covering support material and tower packing. It has the characteristics of high temperature and high pressure resistance, low water absorption and stable chemical properties. It can withstand corrosion by acids, alkalis and other organic solvents, and can withstand temperature changes in the production process. Its main function is to increase the gas or liquid distribution point, support and protect the active catalyst with low strength.