Wear of tools at pregrinding of mineral balls
The shape of the worn face of the abrasive disc at the pregrinding of gem balls is studied. The disc wear is measured for different methods of ball grinding: in a vertical drum, in a disc separator and in a sector-shaped container with the inclined abrasive disc. The factors causing the reduction of impact loads in the pregrinding of balls from brittle materials are determined. The results of the study of the pregrinding of balls from cubic blanks in the machine with the inclined abrasive disc are presented