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The main equipment of wet grinding is a wet ball mill. The structure of the wet ball mill is simple, and there is no need to add too many auxiliary accessories. Water or absolute ethanol needs to be added during the grinding process. During the grinding operation, large materials will be impacted and ground by the ball milling medium. Cracks are generated under the action, and the cracks gradually increase and deepen, and finally the materials are separated from the cracks, so as to achieve the effect of grinding the bulk materials smaller.
The material and the grinding medium are mixed together and collide with each other and squeeze. If it is dry grinding, because there is no material blocking in the cracks, it is very likely that the cracks will be squeezed smaller and smaller during the extrusion process, which will cause grinding. The mine efficiency is low and the material separation speed is slow; and if it is wet grinding, when small cracks appear in large minerals, the fluidity of the water will force the water flow into the cracks, which will block it, and then pass the impact of the grinding medium. And squeezing, it will gradually increase the cracks, and eventually the large pieces of material will be crushed, so the efficiency of wet grinding is high.
In addition to high grinding efficiency, wet grinding has the characteristics of low noise, fine and uniform grinding particle size, and less pollution to the working environment. The advantage of the dry grinding of the ball mill lies in the use of the grate plate type of tail discharging, the discharging speed is fast and smooth, there will be no belly ups, the cylinder does not need to be cooled, and the service life is long.
The above mentioned are the advantages of dry grinding and wet grinding, but there are also disadvantages. The disadvantage of dry grinding is that there may be dead corners in the mill. Once the material enters the dead corner, it will not come out without the drive of water, and it will not be able to grind; the disadvantages of wet grinding It is the process of dehydration and drying after grinding, which increases the cost.