The products are used in mining, coal, which was characterized by anti-skid, strong hardness, elasticity, compression, vibration-resistant, corrosion-resistant,uneasy to plug, feet close together and long life, high strength, good wear resistance,uneasy to brittle stopped and the impact of large, completely overcome other mine screen all shortcomings. and they apply to a wide range of the initial screening of metal ores and coal screening operations