Here, we mainly talk about several key factors that affect the grinding fineness of vertical mills:
1) The adjustment of the size of the crushing particle size and the sieve holes of the grid screen is a closed construction. The operator of the mill must supervise the crushing system. If the particle size of the ore feeding the mill changes during production, it must be immediately reflected in the crushing workshop. . It is required that the finer the crushing particle size, the better, because the size of the feed crushed stone determines whether the mill is empty and the power consumption is multiplied.
2) Different ore has different hardness, but it cannot be adjusted relative to the same ore. In production, reasonable ore proportioning can be carried out to make the ore size as uniform as possible, and the proportion of lump and powder ore is reasonable and stable. Uneven feeding will lead to unstable production, less equipment is idling, and more feeding is easy to block materials.

3) After the equipment is overhauled in some mineral powder processing plants, because the mineral powder in the classifier has not been cleaned up, after a long period of sedimentation, the ore sludge will be more solid. When the main shaft of the classifier is lowered, due to carelessness, the The spindle is completely lowered, resulting in less sand returning than normal.
4) The blades of the classifier are worn. After the blades are worn, the amount of sand returned is reduced, resulting in coarser grinding fineness. In addition, if the blades are severely worn, the life of the classifier will be affected, so check the blade wear in time during work. Replace worn blades in time. The speed of the pulverizer, the speed of the classifier, and the distance between the impellers of the classifier are very critical and need to be observed frequently.
5) In many ore powder processing plants, because the size of the opening of the classifier was not adjusted properly during the equipment installation, and the workers did not pay much attention during the operation, it also affected the grinding operation invisible. The lower opening of the classifier is low, and the mineral powder precipitation area is relatively large, so the amount of sand returned will be large, and the grinding fineness is relatively fine. The opening under the classifier is large, and the mineral powder precipitation area is relatively large. The amount of sand will be large, the grinding fineness is relatively fine, the opening on the classifier is low, the amount of sand returned is relatively large, the grinding fineness is relatively fine, the opening on the classifier is large, the relative sand returning amount is relatively large, and the grinding fineness is relatively fine. .