At present, in the fields of metallurgy, mine, building materials, chemical industry, and electric power, the total annual consumption of grinding balls used in ball mills is about 1 million tons, of which the annual consumption of ball in iron mines is over 300,000 tons, which is an important cost index in mine production. In the past, the Daye Iron and steel (Group) Company, Wuhan Iron and Steel, used ordinary forged steel grinding ball, the annual consumption of nearly 4000 tons of steel ball, worth more than 17 million yuan. In order to reduce the ball consumption, in the MID-90s, the low chromium alloy cast ball was developed gradually. At that time, most kinds of casting balls had to be heat treated before they could be put into use. In this way, the production cycle was long, and special equipment and facilities were needed. Whether the cast ball of low chromium alloy can be used directly without heat treatment, especially whether it can be used normally in large and medium ball mills, is a subject that needs to be studied and practiced. For this reason, the mine has carried out a series of tests and trials, after more than two years of exploration, a better solution to this problem. After long-term grinding of iron ore, copper ore, and phosphate ore, the results show that the cast ball has excellent performance and obvious economic benefit.