... high quality bauxite as raw materials, anthracite,scrap iron,in electricarc furnace (stationary,dump type) more than 2000 degrees ... single grain hardness;In the same time,by using our unique QY qing blowing technology,effectively remove light,soft impurities,particle surface ... polishing,With tools such as attached,Can also be used in the surface piating,precision casting or make advanced refractory ...