The use of ball mills for wet grinding of various materials is a very common and efficient process. Ball mills are used to grind raw materials, ores and minerals for flue desulphurization, coal and several other raw materials. Ball mills can be of two types, based on the different ways materials are discharged.
Wet Grinding, also known as wet milling, is a process of taking materials in a liquid form or slurry and reducing particles, such as agglomerates, by breaking them apart or shearing them down in size. Since the early 1800s companies have manufactured machines that were engineered to process wet materials.
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.
Bond39;s theory was more suited to the particle size ranges involved in conventional ball and rod mill grinding . Rittinger39;s law showed more app1icability to the fine particle grinding range . The development of mathematical models for size reduction began nearly 20 years ago.
Wet grinding mills also referred to as media mills are used to reduce particles in liquids. The mills make it possible to break down, what are known as agglomerates into their finer individual particles. This increases color development, gloss transparency, particle size distribution and can even increase chemical activity.
Juhász and Opoczky divided the grinding kinetics of a dry batch ball mill into three different stages. In the initial stage of grinding , the size of the particles is decreased, and the grinding time is mostly dedicated to developing new specific surfaces .
The choice between wet and dry milling is, in general, unimportant in small scale milling but is a major technical problem when large scale milling in the metallurgical industries is involved. On purely mechanical grounds it is difficult to see any great difference in fundamental principles between wet and dry milling, since dry milling may be regarded as wet milling with a fluid having the ...
The Diaphram or Grate Discharge mill keeps coarse particles within the mill for additional grinding and typically used for grinds to 150 250 microns. The Center Periphery Discharge mill has feed reporting from both ends and the product discharges from the center bottom.