Grinding balls can be divided into three categories: cast steel balls, forged grinding balls, and spheroidal cast ball grinding balls. However, spheroidal graphite cast iron balls are rarely used, and cast balls and forged grinding balls are more common. However, in China, 90% of the manufacturers who use the foundry grinding ball as the grinding medium are used, and the forged grinding balls are used more in foreign countries.
The steel ball produced by the casting smelting method is called a cast steel ball; it is not required to be smelted and cast, but the steel ball produced by forging is called a forged grinding ball. Forged grinding balls have a good combination of alloying elements such as high carbon, manganese and chromium. The heat treatment hardenability is strong, the hardness difference between the inside and the outside is small, and because of the difference in impact value, it is determined that the forged ball is more broken than the cast ball.
The crushing rate of the forged grinding ball is small, and the crushing rate of the cast steel ball is large. In general, the crushing rate of the cast steel ball is 3%, and the forged steel ball is at 1%. Due to the small breaking rate, the flour extraction rate of the mill is increased and reduced. The cost of mineral processing increases the efficiency of mill production. Since our forged grinding metallurgical structure is a fine needle-shaped martensite structure with high hardness and the same wear resistance as cast steel balls, the price of forged grinding balls is much lower than that of cast steel balls, and the grinding cost is lower.www.grindingballsmedia.com