What kinds of grinding aids are used in the ultrafine grinding?

In the ultrafine grinding process, commonly used grinding aids can significantly improve the grinding efficiency, at present, commonly used in industry grinding aids are water, organic liquids, surfactants and inorganic electrolytes. Wet milling is more efficient than dry milling because of the water-assisted grinding effect that water can help to grind because of the reversible reaction between the unsaturated bonds on the surface of the material particles and the water molecules. In addition, due to wet grinding fine particles tend to be suspended in water, grinding buffer when the ultrafine mill is smaller than when dry. The grinding efficiency of the material in organic liquids is higher than in water. For example, with organic liquids such as isoamyl alcohol, the material surface area is 12 times greater than in water. Ceramic materials are milled in carbon tetrachloride and methylcyclohexane at higher rates than nitrogen. In the fine grinding of ceramic powders, such organic solutions are often used. Surfactants are also an effective class of grinding aids. Polysilicon rings are used in special ceramics and talc grinding. Silicone, carbon tetrachloride, n-hexane, organic bases and alkyd resins are used in the grinding of quartz and limestone. These grinding aids that reduce the surface energy of the material due to adsorption enhance the grinding efficiency. In addition, the efficiency of grinding can also be improved when the surfactant acts to prevent the abrasives from sticking to the material and to disperse the material particles. Some inorganic electrolytes also improve the grinding efficiency during the grinding process. To polyvalent electrolytes as grinding aids, grinding some of the raw materials have better results, commonly used AlCl3 and CuSO4 is an example.

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