![HPGR High Pressure Grinding Rolls](/3wzg0da/32.jpg)
HPGR High Pressure Grinding Rolls
· As an energysaving alternative to the SAG mill, HPGR is particularly suited for the pregrinding of hard, highly siliceous gold ores. This will help to downsize the ball mill while maintaining the throughput. In the pregrinding mode, HPGR use may result in energy savings of 15 to 30% and throughput increases of 20 to 40% (Schonert, 1991).