Grinding balls included one kind named chrome cast iron grinding balls,three series(Hihg/Middle/Low chrome cast iron grinding balls) can be provided in standard sizes,they are used to assist in the extraction process for many metals such as gold,copper,lead,zinc,iron,nickel,tin,chrome and silver.In addition to metalliferors processing,balls are used for grinding coal in power stations,especially for lime and clinker in the cement industries and base materials in thd building products industry.The ball hardness profiles to maximize wear adn impact performance,customized product is available to meet milling adn ore conditions.The balls have gotten high reputations for their high hardness,good wear resistance,no breakage etc.