... Norilsk/lafarge/Codelco. 3:CE,inspectorate,SGS certificates Grinding Mill Ball KaiYuan Co is professional manufacturer which produce high/ ... low/middle chrome grinding balls and bars(mill balls/bars).Our products are used ... to USA (cement plant),Chile(copper mine),Botswana(copper mine),Iran(zinc mine),Russia(cement plant and power plant), ... ZQCr17 ≥58 ≥49≥3.0≥12000 grinding mill ball