15/11/2020 · Process water will also be added to the SAG mill, via the SAG mill feed chute. The variable speed SAG mill will operate with a nominal ball charge of 10% v/v. The 125 mm steel balls will be loaded into the SAG mill ball storage hopper via a frontendloader (FEL). Media will be added to the SAG mill feed conveyor via a dedied media charger.