Will HPGR replace SAG Mill and Vertimill displace Ball ...
To place a ball mill or a VERTIMILL directly on the HPGR product may work on soft iron ores but will not work well on harder ores that require over about 7 kWh/t to achieve a T80 of mm. When hard minus 10 mm scats are present (referring to HPGR product), the ball mill efficiency is reduced.