... and glass 4. we are a factory and exporter high temperature alumina aluminium oxidepolishing grade Qingdao Huierde International ... aluminum hydroxide, high temperature aluminum oxide and white corundum, etc..We have our own refractory factory which passed ISO9001 ... refractory brick, refractory cement castable, refractory cement and high temperature refractory fiber to America, Germany, India, Japan and ...