Study On The Impact Of Liner Structure To The Grinding Efficiency Of Ball Mill

Ball mill is the major equipment in mineral comminuting. It is very important in the mineral processing industry etc. For the ball mill used in mines, the two main issues are working inefficiency and high energy consumption and material consumption, domestic and foreign scholars mainly study the law of grinding media's motion and media materials in order to solve the two issues, and there are very few studies on the impact of liner structure to the mill's efficiency and its own wear. In fact, the liner structure not only affects the efficiency of ball mill, but also has an important affect to theirs own wear. Therefore, Study liner structure in order to improve the mill's efficiency and lower the wear of liner has very important significance.Base on a number of relating documents, the existing two-dimensional prototype ball mill was transformed to the three-dimensional prototype ball mill, through experiments and theoretical analysis, the paper carry out research work as follows:According to the theory of ball mill grinding technique, the paper analyzed and researched the process parameters of three-dimensional prototype ball mill, and the rotate speed rate, medium fill rate, ball to powder ratio and other process parameters are chose, and designed six different liners; then the paper analyzed the-200 mesh product cumulative with time and it showed that:when the grinding conditions are fixed, there is an optimum liner face angle and liner height; the grinding kinetic equation corresponding each liner are obtained by studying the grinding kinetic of ^600 x 400mm ball mill, and the accuracy of the dynamic equations are verified, verification results show that the accuracy of kinetics equation is higher and the equations can truly and accurately reflect the grinding process of different types of liners, and the scattering rate—R(t) at the rational time and the size to be grinded under the circumstances of different liner structure can also be extracted; through analytic statistics of each liners'weight at before and after grinding, and found that the liners'wear is decreases with increase of the face angle when the height and width of liner is certain; when the liners'face angle is equal, the greater the height and width and the more serious wear and tear.Experiments show that under the certain grinding conditions, there is an optimum liners'face angle and liners'height, and when the optimum structure of liner is used, the grinding efficiency is maximum value. When the best liner face angle and height is determined, it provides a reliable theoretical basis for the design of the complex surface liner. The paper study the impact of liner structure to the grinding efficiency by analyzing products'size, this approach provides accurate and reliable theoretical basis for design structure of liner, also it provides a reasonable reference for choosing the liner structure in the actual production.