As we all know, the function of the ball mill liner is roughly two, one is to protect the cylinder, and the second is to raise the steel ball to the required height at a specific rotation speed so that the steel ball falls like a waterfall and achieve an ideal grinding effect. The ball mill is an indispensable part of the mine processing equipment. Many ball mill users report that the service life of the ball mill liner is short and the production cost is high. Based on years of production experience, Luoyang Yujie has summarized the main factors that affect the life of ball mill linings, referenced the users of the ball mills, avoided similar situations in production, and improved the service life of ball mill linings.
The broken media of the ball mill are: various types of mine materials (manganese, copper, tungsten, etc.), various types of stone (limestone, granite, gneiss, basalt, diabase, etc.), and coal used in the power industry. The hardness index of the medium is an important basis for determining the wear and failure of the liner. The higher the hardness, the shorter the service life of the liner. Conversely, the use cycle increases. The fuel coal in coal-fired power plants is the main grinding medium for ball mills. The erosive coefficient of raw coal in the country is generally between 0.8 and 2.0. If too much sand and stones are involved in the coal, not only the amount of heat is insufficient, but also the grindability is poor. Inevitably cause premature failure of the liner.
Impact on lining material
From the analysis of the physical properties of the liner material, the main parameters affecting the anti-wear effect are the matching of hardness and impact toughness. The hardness of the material is high, and its wear resistance is good. It is basically a proportional relationship due to the ball mill. During operation, the steel ball falls in the form of a waterfall, and an impact force will be generated on the material and the liner. The impact force depends on the diameter of the steel ball and the diameter of the grinding cylinder.
Design, manufacturing and installation quality impact
Liner manufacturing quality is poor, such as uneven, cylindrical wall deformation, installation and lining board liner, liner and barrel wall does not match and their own casting defects, mechanical properties, chemical composition did not meet the requirements of the qualification, etc. The direct factors that affect the normal operation of the ball mill.
