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In the Beneficiation Plant, grinding cost is relatively high in the total cost of the parts. Effective and reasonable control of the grinding fineness is to reduce the cost of ore and improve the economic benefit of important factor. Grinding fineness, is to influence dressing index one of many factors, grinding fineness directly affect the size of the discretion of the concentrate grade and recovery of products.
Ensure that the grinding fineness first must fully understand the grinding fineness factors.
Influence factors of grinding fineness are:
The crude ore hardness, crushing the size screen, case screen hole, gives the ore amount, Ball Mill model, steel ball quantity, steel ball size scale, ball mill lining board wear, ball mill speed, the sorting machine speed, the sorting machine main shaft hoisting height, the sorting machine blade wear, the sorting machine of the overflow weir height, the sorting machine next opening height, the sorting machine next open size, on opening height, hierarchical classification on size, return in mouth water sand size, ball mill water supply size, ball mill row ore in mouth flush size, etc.
To know all these factors, we must in the production operation of a a check, find the optimal adjustment factors.
The crude ore mineral hardness:
Different mineral hardness is different, this factor relative to the same ore is fixed, is also unable to adjust. But in production, in Beneficiation Process technical requirements, under the premise of ore matching can be reasonable, as possible even the size of the ore, massive, the powder ore matching reasonable steady. In addition to the ore place in ball mill, belt for a long time wear may leak ore, the leakage in most cases is powder grinding, this part of the leak as far as possible in the ore must add to the ball mill, if long time piled up, can cause ball mill to mine not even, cause manufacturing is not stable. Especially difficult dressing, often powder mineral and mineral properties of the same.
The sorting machine main shaft hoisting height, is to influence the amount of sand and grinding fineness is one of important factors. General normal production requirements grade machine spindle put in position. Some concentrator ball in equipment maintenance polisher, due to the sorting machine without the ore clean, in long time sink set, the reality is exploratory experiment sink, in down grade machine spindle, because do not carefully, not the spindle fully extended, cause return sand amount less often than normal. Another spindle not put down can also be caused by spindle long time no to clean up oil, so in the operating process to attention.
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