High Pressure Grinding Rolls 911 Metallurgist
· High pressure grinding rolls HPGRs have struggled for acceptance into the hard rock mining sector CRITICAL HPGR PARAMETERS HPGR roll diameters typically range from m to m depending on the supplies and roll widths vary from m to m The aspect ratio of the rolls also varies as a function of manufacturer Typical HPGR throughput rates range from 20 to 3 000 tph with installed motor power as high