This product is made of electrofused magnesia sand, sintered magnesia sand, flake graphite, phenolic resin as the binding agent, Al, Si, SiC, B4C and other antioxidants through high-pressure molding and drying treatment. This product has excellent thermal shock stability and low alkaline slag erosion resistance, high temperature creep and high volume stability is good wait for an advantage, can be used in low and medium carbon ferromanganese alloys and low carbon ferrochrome refining furnace, wave packet, and hot metal ladle, steelmaking converter, electric arc furnace and ladle, RH vacuum refining furnace, etc.