• Estimated Water Requirements for the Conventional ...

    water usage. The crushed ore is transferred to a semiautogenous (SAG) mill or ball mill where the ore is further reduced in size. Water is added to the ball mill, in which a slurry that usually contains from about 20 to 55 percent solids is produced (Singh, 2010; International Mining, 2011) (see fig. 2). The mill operates in a closed circuit with screens that size the ore and cyclones that ...

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  • TECHNICAL NOTES 8 GRINDING R. P. King

    steel balls in a ball mill, or large lumps of ore in an autogenous mill or a mixture in a semiautogenous mill, as well as the slurry that makes up the operating charge. Let Jt be the fraction of the mill volume that is occupied by the total charge, Jb the fraction of the mill volume that is occupied by steel balls and E the voidage of the balls and media. U is the fraction of the voidage that ...

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     · Ore from the belt feeder enters a 10′6″dia. x 13′0″ ball mill, which grinds the 5/8" ore to 70% minus 200 mesh. Barren solution is added to the ball mill to produce a slurry of 60% solids. The solids content of the ball mill discharge is controlled by a ratio control loop, whereby barren solution addition is proportional to the ball mill feed. The set point of the controller is ...

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    Powder Technology, 55 (1988) 231 240 231 Fineness of Grind and the Consumption and Wear Rates of Metallic Grinding Media in Tumbling Mills D. D. HOWAT and L. A.

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