Grinding medium steel balls should meet those requirements

The output of the ball mill is not only affected by the loading of the grinding medium steel ball, but also by the diameter of the steel ball. It is required to have a certain ball diameter and a ball with different ball diameters to maintain a certain proportional relationship. Generally, the size of the ball diameter in the cylinder is 25-60 mm.

If the cylinder is a large-diameter ball, its impact force is large, which is good for crushing large coal. However, due to the large gap between the ball and the ball, the relative surface area is small, and the extrusion and milling effects are weakened. Both output and fineness of coal powder are unfavorable. There are too many small-diameter steel balls in the cylinder, and the impact force is small, which will reduce the output of the coal mill. At the same time, due to the relative increase of the surface area of the steel ball, the wear of the steel ball will increase, and the coal consumption will increase.

For example, during the operation of the coal mill, the weight and diameter of the grinding medium steel ball are continuously reduced due to wear and tear, so it is necessary to regularly add new balls to maintain a certain amount of steel ball load. Generally, the large diameter ball is added, and the ball filling amount should be determined according to the steel ball wear rate and the amount of coal.

After the coal mill is running for a certain period of time, the number of small-diameter grinding medium steel balls in the cylinder increases. Therefore, after about 3000 hours of operation, the steel ball needs to be shut down to clean the ball and the broken ball with a diameter of less than 15mm, and at the same time make up the new ball.www.grindingballsmedia.com