The main factors affecting the quality of grinding are: ore hardness, ore size, ore size and stability, ball mill specifications, number of steel balls, size and proportion, ball mill liner, ball mill speed, classifier speed, grader spindle Lifting height, large leaf plate and small blade intact condition, overflow weir height, opening and lowering of classifier, size, upper opening height, size, ball mill feeding water size, ball mill discharge level and so on.
Among them, ore hardness, crushed final particle size, ball mill specification model, steel ball quality, steel ball quality, steel ball addition amount and size ratio, ball mill speed, classifier speed, classifier blade spacing, classifier overflow weir, classifier The height of the upper and lower openings and the size of the opening have been determined at the time of the design of the plant. If it is unreasonable, it can be solved by other means.
The parameters that the ball mill needs to adjust in the daily life are: the size of the ball mill to the ore water (including the anti-sand tank flushing water), the amount of water added to the ball mill discharge port, and the ore supply to the mine.
The ball mill adds water to the mine: the ball mill increases the ore water volume, the residence time of the ore in the grinding machine becomes shorter, the grinding ore concentration becomes smaller, and the particle size becomes coarser. On the contrary, the ball mill water supply decreases, and the ore is in the grinding machine. The residence time is relatively increased, the grinding concentration is increased, and the particle size is fine.
Ball mill discharge and water: The amount of water added to the ball discharge port of the ball mill increases, and the amount of sand in the classifier increases, so that the overflow concentration becomes smaller and the particle size becomes finer. On the contrary, the water volume of the ball mill discharge port decreases, and the classifier reduces the amount of sand. Small, the overflow concentration is increased, and the particle size is coarse.
Feeding factors: The stability of the ore supply directly affects the quality of the grinding, and also affects the fineness of the classifier. The variation of the ore content is small, the grinding and grading operation is stable, the quality of the grinding grading product is good, the smaller the variation is, the more stable the grinding grading operation is, and the better the quality of the grinding grading product is. Otherwise, the quality of the milled graded product will deteriorate.
In summary, the mill miner in the class, not only must pay attention to the changes of these parameters and just the right adjustment, but also take into account the interaction between these parameters and comprehensive consideration, analysis and adjustment. This will directly reflect the technical operation level of the ball miller and the key to improving the quality of the grinding.
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