Influence of Sodium Hexametaphosphate on Muscovite Grinding and Its Mechanism Analysis

In this paper, different doses of sodium hexametaphosphate (SHMP) were added as grinding aids in the process of muscovite grinding, and the effect of SHMP on the grinding efficiency of muscovite was studied. The grinding experiment results show that the grinding efficiency increases significantly with the increase in SHMP dosage. The mechanism of SHMP improving the grinding efficiency of muscovite was analyzed by various test methods. Experimental results showed that when SHMP was used as a grinding aid, the ordered structure of muscovite crystals was destroyed, the surface of muscovite was roughened, and obvious cracks appeared. SHMP was physically adsorbed on the muscovite powder, which effectively improved the pulp environment of muscovite powder during grinding, resulting in more dispersed muscovite powder, and improved the grinding efficiency. This study provides theoretical guidance for the efficient preparation of fine-grained muscovite powder and the action mechanism of grinding aids.Keywords:grinding aids;muscovite;sodium hexametaphosphate;pulp dispersibility