Comparison of One and Two Stage High Pressure Rolls
The test work indicated that thesingle stage HPRrequired 27.25 kWh/It of new feed compared to 34.0 kWh/It for the rod mill to produce an 85 percent passing 270 mesh ball mill discharge. The twostage HPRflowsheet was even more energy efficient, requiring only 23.29 kWh/It of new feed.