The ball mill is widely applied in mineral classification, cement, fireproof materials, glass, pottery, chemical industry and so on. The ball mill can grind all kinds of rocks and grinding materials. There are two ways of grinding: the dry process and the wet process. Ball Mill Working Principle: The ball mill is a horizontal rotating device transmitted by the outer gear.
But when wet grinding, different grinding aids are needed to prevent it from reacting with the material to produce other substances during the grinding process, resulting in grinding failure. During the drying process, there may be crystallization imagination in the drying process of the material, and the particles aggregate together to form agglomeration, resulting in a reduction in the grinding effect. In dry grinding, due to the shape of the grinding tank itself, there will be a certain ...
A slight difference of condition between the two cases, however, is that with dry milling the fluid fills the whole of the mill shell not occupied by the balls, whereas with wet milling the liquid occupies only a part of the mill volume not occupied by the solid charge. This difference would be expected to have some slight effect on the motion of the ball charge but the effect would be expected to be so small as to be practically negligible.
DOVE Ball Mills are deigned for either wet or dry grinding of materials, in various models, and in accordance to the processing and the crushing plant design, to cater to the liberation size of the minerals and the hardness of the ore. DOVE supplies two different kinds of ball mills Grate type, and Overfall type.
The difference between the result gotten from using wet and dry milling are most of the time very large. This difference is attributed to the power. The power to drive a wet ball mill is said to be 30% lesser than that of a similar dry ball mill.
There has been a well established truth that wet grinding is more efficient than dry grind ing. This should apply to ball mill grinding as well as autogenous grinding. It has been earlier shown that the effect of dry ball mill grinding increases considerably, when the fines are efficiently removed from the mill.
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The mode of grinding, wet or dry, has significant differences in grinding kinetics and the properties of the ground products. Breakage rates for wet grinding are faster than those for dry grinding when the solid concentration is less than 50 vol %.
Capacities and efficiencies in wet and dry ball milling at different speeds and ore charges have been discussed in the foregoing pages. The results are summarized in table 16, which shows that in both capacity and efficiency grinding was at its best with small ore charges and high speed. Likewise, in wet grinding the capacity was best with a small ore charge at high speed, but the efficiency was best with a large ore charge at slow speed.
3 Wet ball mill has a simple transportation device with less auxiliary equipment, so the investment is about 5% 10% lower than that of dry ball mill. 4 The grinding particle size is fine and uniform, and the wet ball milling can not only grind agglomerate into fine particles, but also mix the lean material and the plastic material well. Disadvantages: