... . Polishing of metal and glass 4. we are a factory and exporter high temperature alumina aluminium oxidepolishing grade Qingdao ... such as refractory material, alumina, aluminum hydroxide, high temperature aluminum oxide and white corundum, etc..We have ... export refractory brick, refractory cement castable, refractory cement and high temperature refractory fiber to America, Germany, India, Japan and ...