Ultra-fine grinding process aids for a very significant impact. The grinding aid for grinding aid mechanism, there are mainly Liebinjieer and West Takenori¡¯s ¡°absorption reduces hardness¡± and Christopher Parr¡¯s ¡°slurry rheology adjustment¡± are two theories, this study with sodium hexametaphosphate, sodium polyphosphate mixing mill for superfine grinding aid the process of mica effect, from a different point of view of the mechanism of its grinding aid.

Aids sodium hexametaphosphate, sodium polyphosphate ultra-fine grinding of mica grinding aid has a significant role in a certain dosage range of aids, when the amount too much or too little will reduce its role to help grinding. Optimum amount of sodium hexametaphosphate to 2kg / t, the optimum amount of sodium polyphosphate to 1.5kg / t (C = 60%), sodium polyphosphate effect of grinding aid better than the sodium hexametaphosphate.

Aids only when the concentration reaches a certain value in order to reflect the significant role of grinding aid, the optimal concentration of the test c = 60%.

Sodium hexametaphosphate, sodium polyphosphate, when the main function to help reduce the grinding slurry viscosity, improve the rheology of the slurry, and improve grinding efficiency; aids adsorbed on the surface of mica mineral, mica so that the electric potential is more negative large, increasing the electrostatic repulsion between particles, which can be stably dispersed mineral particles and improve grinding efficiency.

Mica is an important non-metallic mineral materials, has a wide range of industrial uses. It is the alkali metal and seal the moisture content of soil metal alumi128201280546 silicate, mica is a layered silicate mineral, with good resistance to splitting, along the cleavage plane can peel into very thin slices. Muscovite mica itself in addition to the fine features, there are sliding, good coverage and strong adhesion and other characteristics. Crushed mica, whether and to what extent, showed a sheet, with good flexibility, toughness.

Mica is a fine high-grade paint, coatings, cosmetics ideal filler. Mica finer, its larger diameter to thickness ratio, as a filling material to enhance the stronger the effect. Energy concentrator crushing operation is known to most, the least efficient unit operations, when grinding into ultra-fine grinding range, the higher energy consumption, and less efficient. Therefore, how to improve grinding efficiency, improve the grinding means, more and more attention, the author used in the process of grinding aids, can get good results with practical significance.

With mechanical crushing of the more in-depth study, it is increasingly found that mechanical grinding process is not only a mechanical mechanical process, and is a mechano-chemical process, the material in the grinding process, the crystal structure, physical and chemical properties have undergone a series of changes. Studies have shown that, in the grinding process of adding some of the agents, can significantly improve the grinding conditions and improve grinding efficiency. This fully shows that ultra-fine grinding aids in the important position.

From:http://www.vipeakmill.com