The problem of the ratio of the ball mill is a problem that often plagues people. The rationality of the formulation directly affects the production efficiency of the ball mill, and also affects the production quality of the ball mill to a certain extent. What about formulation? How about adding steel balls to the ball mill in proportion to the size of the steel balls? First of all, the ball ratio of the ball mill in the cement plant, mine selection site, thermal power plant, and chemical plant should be based on factors such as the diameter of the ball mill surface, the hardness of the ore, the ore size of the ball mill, the hardness (quality) of the steel ball, and the speed of the ball mill. Determine the added ratio of the steel ball. When the model of the ball mill is determined, the speed of the ball mill is also determined, and the hardness of the ore can be measured. The ore particle size of the ball mill is determined by the size of the tracer screen. Generally, the newly installed ball mill has a running-in process. During the running-in process, the amount of steel balls is added for the first time, accounting for 80% of the maximum ball load of the ball mill. The proportion of steel balls can be added according to the size of the steel balls (ф120mm, ф100mm, ф80mm). , Ф60mm, ф40mm). Steel ball addition: different ball mill models have different total ball loads. For example, the MQG1500 × 3000 ball mill (with a processing capacity of 100-150 tons) has a maximum ball loading capacity of 9.5-10 tons. For the first time, steel ball large balls (ф120mm—ф100mm) accounted for 30%-40%, middle balls 80mm accounted for 40%-30%, and small balls (ф60 and ф40mm) accounted for 30%. Only 80% of the ball amount is added, because the ball mill is installed, the size of the ball mill teeth needs to be meshed, and the amount (ore amount) is gradually increased. After the ball mill is continuously operated for two or three days, stop the ball mill to check the meshing of the gears. Everything is normal. Open the manhole cover of the ball mill and add the remaining 20% ​​steel balls. After the ball mill is running normally, the steel balls in each class are added in 3: 4: 3 (ф120mm is 3, ф100mm is 4, and ф80mm is 3). Note: The addition of small steel balls is only for the first time. Because the normal friction between the steel ball and the steel ball, the steel ball and the ore, the steel ball and the ball mill liner during normal operation of the ball mill will increase the wear, make the big ball small (grind to medium ball), small ball. Therefore, under normal circumstances, there is no need to add a small ball. In the case of adding small balls, there is no monomer dissociation in the useful mineral particle size. When the fineness of the mill can not meet the flotation requirements, an appropriate amount of small balls can be added. The steel ball in the ball mill is constantly worn during operation. In order to maintain the ball load filling ratio and the reasonable ratio of the ball and maintain the stable operation of the ball mill, it is necessary to perform reasonable ball refilling and low wear and tear. The added weight of the steel ball is based on the quality of the steel ball and the quality of the steel ball, which determines the amount of ore added per ton. It is best to use new wear-resistant steel balls. The best (good quality) steel ball addition is calculated based on the amount of ore processed per ton (that is, 0.8kg per ton of ore is added). General steel balls need to handle one ton of ore (1kg-1.2kg). Different ball mill models have different ratios. The diameter of the ball mill is below 2500mm, and the size of the added steel ball is ф100mm, ф80mm, ф60mm. The ball mill has a diameter of more than 2500, and the size of the added steel ball is ф120mm, ф100mm, ф80mm.