Overflow Ball Mill are generally used to grind materials with 1/4 inch and finer to the particle size of 20 to 75 microns. In order to achieve reasonable efficiency with ball mills, they must be operated in a closed system, with oversize material continuously being recirculated back into the mill to be reground. Various classifiers, such as screens, spiral classifiers, cyclones and air classifiers are used for classifying the discharged products from ball mills. Some tips about the operation of overflow ball mill:
The water allowance:
In case, the feeding ore stops changing, the mouth water size of feeing ore and feed quantity size directly affects the grinding fineness, in the absence of grinding automation, the size of the water, directly by the operators of ball mill machine manual adjustment. Because the two large water flow, increase and decrease it"s hard to see, must be careful observation and finely adjusted. Ball grinding mill feed increases, grinding concentration is thinning, will get coarse grinding fineness; On the contrary, reduce the water mill, grinding mill, will get fine grinding fineness.
The hardness of ore:
Different ore belt may leak due to long time wear mine, its hardness is not the same, in most cases under the leakage are powder ore, especially from the offices of ore and rock hardness is relatively large, centralized add, this factor relative to the same ore is fixed, will cause uneven feed mill, is also unable to adjust. In the ball mill grinder belt feeder, on the premise of meet the requirements of mineral processing technology, this part of the leak mine must fill in a timely manner to the ball grinder as much as possible, can undertake rational ore matching, if long time pile up, as far as possible to make ore size uniform, cause the production is not stable.
The ascension of main bearing:
The height of the main bearing rises, that will cause the sand return fewer than normal situation. If the spindle didn"t clean fuel for a long time, because the ore in classifier not clean, also affect the sand return and grinding fineness is an important factor. Sometimes after equipment repair, under long time deposit. When down grading machine spindle, the normal production requires sorting machine spindle put in position.
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