To what extent can the air mill crush? It is related to the following factors:
1. For the initial fineness of raw materials, the air mill generally requires that the feed is less than 50 mesh.
2. It is related to the physical properties of materials and the fluidity of materials and the uniformity of particles. Some materials have poor fluidity, many impurities and high solvent content, and may be blocked in the production process. At this time, special equipment is needed. Not all materials can be crushed with standard equipment to achieve the crushing fineness.
3. It is related to the crushing pressure in the crushing process. The feeding pressure of some equipment is greater than the crushing pressure, and the crushing pressure of some equipment is greater than the feeding pressure. Specific materials need to be designed.
4. It is related to the feeding speed. Not all materials have good fluidity. Whether screw feeding or vibration feeding is adopted, the feeding process is a very important factor. Some very fine materials are difficult to feed. At this time, special personalized configuration is needed to achieve the feeding effect.
5. Moreover, it is related to the optimization degree of the air mill. There are many manufacturers of air mill, but the fineness made by different manufacturers of the same material is different. Even the fineness made by different models of equipment from the same manufacturer is also different. However, according to experience, the effect of equipment with larger crushing disc is better than that with smaller crushing disc.
6. It is related to the operator's proficiency and operation methods. Some equipment start-up requires small pressure operation first and then large pressure operation, and some are direct one-step operation.
It can be seen from the above that there are many factors affecting the limit particle size of the air mill, the most important of which is the physical properties of the raw materials. The drier and more brittle the raw materials, the finer the limit particle size can be achieved. For example, carbon powder, graphite and other raw materials can easily obtain micron or even submicron fine powder if air mill is used because of their good brittleness.