Study on optimization parameters for ceramic ball of magnetite-quartz mixed system by response surface methodology
Seeking to replace steel balls as fine grinding media to improve the grinding effect is the pursuit of mineral processing plant.In this work,the grinding test of magnetite-quartz system ore with ceramic ball as grinding media were conducted,the response surface method was used to study the effect of ceramic ball size,filling rate and grinding concentration on the average particle size of the grinding product,and the significance of their interaction was analyzed.The results showed that the filling rate had the greatest influence on the average particle size of grinding products,followed by the grinding concentration,and the ball size was the smallest.The interaction between ball size and grinding concentration was the most significant,followed by the interaction with filling rate,while the interaction between filling rate and grinding concentration was not significant.The optimal test conditions predicted by the model were the ball size was 25.96 mm,the filling rate was 34.04％,and the grinding concentration was 70.86％,and the predicted value of the average particle size of the ground product under these conditions was 54.46 µm,which is similar to the experimental average value of 54.41 pm,indicating that the prediction model was reasonable and effective.Comparison of ceramic ball and steel ball test research showed that fine grinding with ceramic ball as grinding media,grinding effect can be significantly improved,and the-0.075 mm particle size yield increased,which was related to the ceramic ball in the mill falling motion was better than the steel ball,ceramic ball crushing rate of fine particle size was higher than the steel ball,which was conducive to improving the effect of grinding.Ceramic ball milling was a new generation of fine grinding technology development direction.
NETL
NSTL
万方数据
