Slag weir developed and produced by Dalian ZhongTang is classified into there series of corundum,MgO-Al2O3 and MgO based. Featured with high temperature strength, good corrosion and erosion resistance and good capability for slag skimming. The products are widely used in more than 50 steel mills in China including Jingtang Steel, Tangshan Steel, Tianjin Steel, Baotou Steel and Handan Steel with high appreciation by end-users. The technology for slag weir production was patented in China and the products were awarded by Beijing Municipal Government as “Product of Self-innovation”.