Mica Application – Mica Grinding into ultrafine powder

MICA is an important non-metallic minerals, which has a wide range of uses in industry. It is the alkali metal and metal water cut aluminum silicates of Kiss soil, chemical structural formula is: KAl2[AlSi30lo] (oH) 2, mica is a layered silicate mineral, and a good split, down the cleavage surface peeled into very thin slices. Muscovite MICA itself together with having excellent characteristics, it also has good sliding properties, coverage, like adhesion characteristics. MICA crushed from what extent, flake, excellent flexibility, toughness. Superfine Muscovite luxury ideal filler for paints, coatings, cosmetics. More fine MICA powder, RADIUS-thickness ratio in the larger, stronger like a filling material their enhancement. Inevitably maximum energy consumption, minimal efficient at smashing jobs is concentrator unit process, enter the ultrafine grinding when grinding range, their energy consumption better, less efficient. Therefore, the way to improve grinding efficiency, improve grinding means a growing number of attention, I made use of in the grinding means of grinding AIDS and have access to good effect, has practical significance.

As increasing numbers of in-depth study with the mechanical milling, there is a growing discovery mechanical milling process isn’t just a mechanical process, and it’s a mechanical chemical process, the information in the grinding process, their crystal structure, and chemical properties of a series of changes have happened. Studies have shown that, in the act of grinding add some chemicals, can significantly improve grinding conditions to further improve grinding efficiency. This fully shows the grinding inside important position of ultrafine grinding. Research can be viewed from the above, grinding an extremely significant effect on Superfine grinding process. For grinding mechanism of grinding, currently there are liebinjieer and weisitewude “put forward by adsorption of lower hardness” and Krippahl “put forward by slurry rheology adjustments” two doctrines, these studies combined with sodium hexametaphosphate, sodium tripolyphosphate on stirring mill grinding effect of Superfine grinding means of mica, analysis and discussion on its mechanism of grinding from different angles.

Grinding aid agent sodium hexametaphosphate, sodium tripolyphosphate on ultrafine grinding of MICA includes a significant role in grinding, grinding a great amount of scope when excessive or inadequate will slow up the amount of grinding. Sodium hexametaphosphate optimum dosage for 2kg/t, the optimum dosage of sodium tripolyphosphate to 1. 5kg/t (C=60%), sodium tripolyphosphate grinding-aid effect of sodium hexametaphosphate well.

Grinding AIDS only if the concentration reaches a specific value as a way to reflect the running role in grinding, the optimum power of the test for c=60%.

Sodium hexametaphosphate, grinding-aid effect of sodium tripolyphosphate mainly reduce pulp viscosity, help the rheological properties of slurry, and improving grinding efficiency grinding surface adsorbed on MICA minerals, MICA electric potential of the larger, helping the electrostatic repulsion between particles, making it possible to stably dispersed particles, improving grinding efficiency.