We should first full understanding of milling fineness factors. To sum up, the influence factors of grinding fineness: undressed ore hardness, broken particle size, case screen mesh, gives the ore amount, ball mill model, the number of steel, steel ball size scale, ball mill liner 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 open height, the sorting machine open size, grading the opening height, grading the size, return in mouth water sand size, ball mill water supply size, ball mill row ore in blunt water mouth size etc.
Understand all these factors in the production operation, we want a a search, find the best adjustment factors.
The crude ore mineral hardness: different ore, its hardness is different, this is a factor is relative to the same ore is fixed, is also unable to adjust. But in production, mineral processing technology requirements in the premise, reasonable ore matching as possible, even the size of the ore blocks, powder, ore matching reasonable steady. In addition to the ore belt in ball mill in the belt, with long hours wear may leak ore, the leakage in most cases is, this part of the powder grinding ore must as far as possible the leakage in time to add ball mill, if long time, focus on the pile up add, can cause ball mill to ore uneven, cause manufacturing is not stable. Especially difficult dressing, often powder minerals and mineral properties of the same .crusher plant
The sorting machine main shaft hoisting height, is to influence the amount of sand return and milling fineness is one of important factors. General normal production requirements grade machine spindle put in position. Some concentrator ball in equipment maintenance, millers because the ore grade machine without clean up, in long time sink sink, exploratory experiment with a real, in the lower grade machine spindle, because do not carefully, not the spindle fully extended, cause to lower amount of sand normally less. Other did not put the spindle can also be due to a spindle long time no cleaning up oil, so in the operating process to attention.
Broken particle size and screen mesh, the adjustment of the building, the ball was closed for broken system must be polisher supervision, if in production in ball mill to ore particle size change, must immediately reflect to a broken workshop. The final request broken grain size the thinner the better.
The sorting machine blade wear: after wearing blades, relative to return sand amount decreases, and cause milling fineness coarsens, additional, if the blade wear bad, will affect the sorting machine life, so in the work in time blade wear, check and change wear blades. The ball mill speed, the sorting machine speed, the sorting machine impeller spacing: when buying in ball mill has been made, pay attention to the purchase in check consultation.
The sorting machine of the overflow weir, influence the high and low precipitation in the ore in production area size, we can see the milling fineness requirement, appropriate to the sorting machine of the overflow weir discretion, if you want to adjust the grinding fineness thinner, can be in the sorting machine two edge welding a certain height, the Angle iron by the insertion of wood to adjust the pull of method sorting machine of the overflow weir height, sometimes the long-term accumulation, but natural exploratory experiment raise the height of the overflow weir.
The sorting machine open height, the sorting machine open size, grading the opening height, grading the size is opening in equipment installation site during production, in many choose factory, because in equipment installed in the grade machine openings size height adjustment, and no good workers in the operating process and not so pay attention, and the invisible the grinding is to influence homework. The sorting machine open, is relatively low precipitation ore district, so return sand amount will be big, milling fineness relatively fine, the sorting machine open, is relatively large sand precipitation area big, the more gentle, so return sand amount will be big, milling fineness relatively fine, classification, return on the mouth low relative amount of sand, milling fineness relatively thinner, classification, relative to speak on the relative amount of sand, milling fineness relatively thinner. Otherwise the opposite. cone crusher
First of all, we have to assume that other factors all normal, the principle is: in the grinding fineness certain circumstances, we want to maximize the increase productivity, and so can effectively improve the production efficiency. (most of the ore, special minerals except) relative to character, milling fineness the thinner, useful mineral and the gangue minerals are obtained from the more fully, to improve the recovery rate of metal, so good in processing ore amount certain conditions, as far as possible to improve the grinding fineness. In addition, grinding is dressing craft first link, in order to ensure the stability of the production, grinding to ensure stable as possible.
In ore amount to a row of ore mouth place blunt water size, gives the ore quantity size directly influence the grinding fineness degree in the domestic many mines, now not realize grinding automation of water, the size of the ball to directly by the polisher, because these two manual adjustment in the water, increase and decrease larger, so it's hard to see requirements must be careful observation and subtle to adjust. First we understand, ball mill, water supply increase grinding concentration is thinning, milling fineness will coarsens, instead, ball mill water decreases, and ground pulp density change, milling fineness will be fine. The ball mill row ore mouth place blunt water change, overflow is thinning, relief fineness thinner. Instead, ball mill row ore in blunt water mouth, overflow become strong, smaller overflow fineness coarsen. So in other conditions including amount of ore under the condition of invariable, to improve the grinding fineness, can put the ball mill is reduced, water mill row in blunt water mouth ore increases, the best two conditions and at the same time, in order to ensure that the adjustment to minimize for milling fineness adjustment cause mine the quantity change propeller is causing the volatility of the flotation. In a lot of the mill for the operation of the polisher, cause ball ore amount is larger, cause change propeller flotation liquid surface is not stable, if not handled in time, flotation work caused the metal recovery and grade change. If the milling fineness coarsens adjust the opposite.
In grinding fineness guarantee premise, can increase the ball to ore amount. To the size of the ore amount, in order to achieve the grinding fineness requirement at the same time, and not bulge for ball mill to stomach. The process is must to each link subtle operation.
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