Factors affecting the grinding efficiency of wet ceramic liner ball mill

[BONOVO]

Ball mill is an indispensable machine widely used in mining equipment, and the grinding efficiency, energy and material consumption of Ball mill determine the production capacity and economic benefits of the whole concentrator. In actual production, the consumption of Ball millcylinder liner plate and ball medium accounts for a large proportion of production cost, so the in-depth study of Ball mill is very necessary and valuable.

There are many factors affecting the grinding efficiency of the Ball mill such as liner material, liner type, ratio of the mill ball, cylinder speed, filling rate, grinding particles and so on. At present, the ball mill with fixed speed is widely used in concentrator, and the wear of the Ball mill liner at fixed speed will cause the decrease of grinding efficiency.

Based on collecting relevant data from the production site of a concentrator and consulting a large number of literatures related to influencing grinding factors, this paper takes the Ball mill cylinder rotation speed and lining plates with different wear amounts as the research object, and carries out the following researches:

(1) The force and motion of a single ball, the motion trajectory of the ball in the circle and the dropping motion state are analyzed and the motion trajectory equation of the ball is derived; The impact characteristics, impact position, impact Angle, impact energy and rotation velocity of the spherical medium on the trajectory are studied. The mathematical equation for calculating liner life is established, and the influence of liner structure, stress and surface parameters on liner life is analyzed.

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