The oil proppant produced by Jingang New Material Co., Ltd. is made of inexpensive low-grade bauxite and industrial wastes as raw materials which are grinded into fine powders added with different additives then mulled, pelletized, polished and sintered, featuring heat resistance, high pressure sistance, high strength, high conductivity and corrosion resistance. The company is the pioneer in developing low-grade resources and recycling wastes in oil fracturing proppant industry.