NINGGUO KAIYUAN produce special mill balls with complete specifications for mine wet grinding in mining industry.According to different working conditions and size of mills,technicians make scientific adjustment of chemical composition and heat treatment process to get the best physical and chemical properties,so the final mine mill balls are with both good physical abrasion resistance and chemical corrosive resistance to achieve the best grinding and crushing effect and then improve the output per mill hour for mining.At the same time,NINGGUO KAIYUAN have perfect after-sales service system and provide free installation of the mill balls, gradation,and guide of the grinding media using all the year round.