Analyze the Abrasion Mechanism of Lining Plate of Ball Mill

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Ball mill is one of the grinding mills widely used in the powder grinding system in such industries as power, metallurgy, building material and chemistry. Among the spare parts of ball grinding mill, lining plate is the key and damageable part and its consumption restrains the production benefits of the ore beneficiation plant. The experts of Fote Machinery start from the research on the abrasion mechanism of lining plate to provide theoretical basis for reduce the wear of the lining board.

In the running process of a ball mill, the movement forms of the lining board and the grinding balls and the crushing and grinding process of the materials are very complicated which is the comprehensive effect of various abrasion mechanisms.

The test observation shows that the grinding balls do not fall like a parabola thought as the previous research and directly impact on the lining board, but in the practical running process, the load height of the balls and the materials inside the cylinder is about 40% of the diameter. With the increase of the diameter of the grinding balls, the load of the grinding balls and materials will also increase, but the height of the ripple of the lining board and the driving effect of the circular pitch on the materials and the grinding balls will decrease with the increase of the diameter of the grinding mill, so that the relative height of the grinding media inside the big-diameter rolling cylinder.

The calculation and the actual measurement show that the impact power on the lining board is only 2~3J or even lower. Foreign research thinks that the energy consumed by the crushing and grinding of the milling equipment accounts for only 10%-20% of the total energy. The rest part will transform to heat energy and be transformed by metal materials and materials consumed to make the lining board and the grinding balls to have plastic deformation, structural change and crack formation and expansion, which is the main reason of the abrasion of the lining plate.

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