Abstract:
Quartz was used as the feed material of the mill, and six grinding aids (inorganic grinding aids: sodium pyrophosphate, aluminum sulfate, and sodium tripolyphosphate; organic grinding aids: glycerol, citric acid, and potassium ethylxanthate) were added to conduct a wet grinding test. The m-order grinding kinetic model of quartz grinding before and after the addition of grinding aids was established, and the effects of grinding aids on the model parameters and grinding rate were systematically analyzed. It was shown that after 10 min grinding, the amount of 0.5% sodium tripolyphosphate increased the −0.074 mm content of the grinding products by 7.44 percentage points and the amount of 0.5% citric acid increased the −0.074 mm content of the grinding products by 7.00 percentage points. The grinding aids changed the values of model parameters
k and
m. The overall grinding effect depended on the combined effect of
k and
m. The increment of −1+0.45 mm quartz with sodium tripolyphosphate grinding rate is the largest, and the increment of −0.45+0.18 mm with citric acid grinding rate is the largest.