An energy-carrying body in which a material is pulverized by its own impact force and grinding force in a ball mill and a rod mill. The most commonly used grinding media are rod media (steel bars) used in ball media and rod mills. In some cases, irregular shapes such as round tables, cylindrical balls, and short round bars are used. This is called a shaped medium.
Material for the grinding media by a multi-cast iron or martyrs processed alloy, followed by a ceramic, aluminum oxide and the like; gravel pebble mill grinding media used in nearly spherical, spheroid, egg-shaped, is made exclusively by the rock or ore Take it. The grinding media of metal materials should be resistant to abrasion and corrosion, have sufficient strength and hardness, are not easily broken during work, and can retain their original shape after wear. For the consumption of metal ball medium (the amount of medium consumed by crushing 1t material, kg/t) and the ball breaking rate (the ball of different sizes under the action of external force, the amount of rupture accounted for the amount of test ball, %) is the mass The main bid. For rod media of rod mills, it is required to be difficult to bend and break. In grinding production, the ability of the ruler to act as a grinding medium is the most critical factor in improving the effectiveness of the mill. To this end, it is required to:
(1) The switch and material of the grinding medium according to the nature of the material to be ground, the feeding material and the particle size of the product and the process requirements of the next step;
(2) Determine the appropriate media size and different size ratio according to the requirements of the feedstock and product particle size distribution;
(3) determining the medium filling rate according to the type of the ball mill and the rod mill and the rotation rate of the mill;
(4) According to the wear law of the medium and the production conditions, the reasonable replenishment of the grinding medium is determined.
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