Wear-resistant steel balls (grinding balls) are a type of crushing medium used in ball mills to crush materials within the mill.

There are four types of wear-resistant steel balls:

The first type is white cast iron with chromium as the main alloying element, referred to as chromium alloy cast iron. Cast grinding balls made from chromium alloy cast iron are called chromium alloy cast iron grinding balls.

The second type is cast grinding balls made from ductile cast iron, called ductile cast iron grinding balls. Among these, ductile cast iron grinding balls whose matrix structure obtained through heat treatment is primarily bainite are referred to as bainitic ductile iron grinding balls; those whose matrix structure obtained through heat treatment is primarily martensite are referred to as martensitic ductile iron grinding balls.

The third type is steel balls hot-rolled from round steel produced by steel mills. The entire process is automatically controlled, resulting in uniform hardness of the steel balls, high core hardness, low breakage rate, and high impact value.

The fourth type is forged from train wheel offcuts. This type of steel ball has low cost, but low core hardness, is prone to breakage, and has poor wear resistance.

Application Fields

Wear-resistant steel balls are widely used in ball mills across various industries such as metallurgical mining, cement building materials, thermal power generation, flue gas desulfurization, magnetic materials, chemical industry, coal water slurry, pelletized ore, slag, ultrafine powder, fly ash, calcium carbonate, and quartz sand.