Five and one quarter inch steel grinding balls cannon balls occupy 8% of the mill volume and are consumed in the grinding action at the rate of 600,000 pounds per month. The SAG mill and all other grinding equipment is remotely monitored and controlled via computer from a central control room.

If you have done proper test work and assumed your Work index is as you provided above quickly I can estimate that your SAG throughput is around 517 t/h and if the total % of mill charge is 25 % of the total mill volume, then you can assume the following assumption .i.e. mass proportion of grinding body to ore be 15% steel balls and 10 % ore this means 1ton/h of ore requires 1.5 tons/h steel ball, therefore you need about 1.5*517 with mass flow 517 tons/h ...

Sometimes, in order to improve the processing capacity of the mill, a small amount of steel balls be added appropriately, usually occupying 2 3% of the volume of the mill .

The load consists of dry ore, steel balls and water, which occupies 30% of the volume. 8% of this volume is steel balls. A Sag mill is most often used in the mining fields, particularly in the mining of precious metals such as gold, copper, silver, and nickel.

The SAG Mill has a small circulation load of oversize given be the 3/8 trommel screen and the 1/2 x 1 1/4 discharge grates. The load of 4 balls in this SAG is good but un measured. SAG Ball consumption is average at 400 g/t while Ball Mill grinding media usage in 550 g/t. Yet, you add steel and nothing seems to happen, tonnage is not noticeably improved.

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## SAG Mill Semi Autogenous Grinding Mill

Five and one quarter inch steel grinding balls cannon balls occupy 8% of the mill volume and are consumed in the grinding action at the rate of 600,000 pounds per month. The SAG mill and all other grinding equipment is remotely monitored and controlled via computer from a central control room.