Types and Materials of Ball Mill Balls

At present, the balls of ball grinding mill widely used are mostly high-carbon and high-alloy casting balls and high-carbon low-alloy forging balls (or casting balls) at home and abroad. In the thermal power plant, cement industry and other dry production process, most of ball mills use high and low chromium cast iron ball. The mining class of wet process most use high-carbon low alloy ball.
Domestic ball grinding balls have various of types, due to market defects, the usage of grinding ball is not based on process benefits to decide, arbitrariness is great. The main varieties are high chromium alloy cast iron class, such as: Cr8, Cr12, Cr15, Cr18, Cr24, Cr26 and so on, low-chromium cast iron such as: Cr2 and marten site ductile iron class. Martensitic ductile iron and low-chromium cast iron in terms of abrasion resistance is the same level, and their difference in the production process. The high-alloy cast iron has excellent anti-wear properties, the higher the alloy, the better the anti-wear properties, and has good economic benefits. In the power plant, cement plant and other dry grinding process, high-chrome ball wear only 15 to 50 grams per ton, the usage of high chrome ball not only save costs, reduce labor, reduce mill power consumption, but also reduces the waste of resources. Should be blunt said: high chrome ball can be called green ball.
The main varieties of forging ball and rolling ball is high carbon chromium molybdenum alloys and low carbon manganese alloys. Forging ball and rolling ball process is simple, low manufacturing cost, consider the economic benefits of mining wet process is generally used in low chromium alloy ball, its iron ore, copper, molybdenum ore wear generally 500 to 700 grams. Improving the hardness of low-chromium alloy ball is the most effective way to reduce wear. Cement and mining should be based on the mill diameter, lining the surface shape and size of the feed particle diameter grading. Gradation principle is only one: as far as possible to reduce the diameter of the ball, because the ball mill is grinding machine, if it is to bear the role of broken, even if only a small part, it is also very inappropriate.
Under the premise of the material selected, ball grading of ball mill is very important. The ideal ball-milling gradation combined with the ideal liner surface shape allows the mill to achieve maximum efficiency. The correct choice of material is the ideal ball grinding gradients, and the ideal shape of long-term lining board maintain the best state of the fundamental guarantee.