about us. GAOTENG was founded in 2000, specialized in grinding media (such as:flint pebble, silex lining brick, alumina ball & alumina lining brick) for ceramic industry, cement, glass, quartz and zirconium silicate industry etc., exported to more than 30 countries and regions around the world, South-east Asia, the Middle-east, Japan, America, Europe with over 140 customers.