CalculationCompartment 1Compartment 2

Lu (Panjang) 2,7m6,4m

D (Diameter)3,18m3,22m

Q (Bulk Weight)4,4ton/m34,65ton/m3

F (Filling Degree)32%32%

Q (Grinding Media Charge)33,521Ton83,9725Ton

Compartement Power Consumption

Mencari h/D dan ah/Da(Arm of Gravity in relation to mill diameter)q(specific Charge %)

0,1400,57932,4

0,1450,58531,8

h/D = 0,143a = 0,583H= (h/D +1/2). DH= (0,143+1/2). 3,35H= 2,154 mCritical mill speedncrit = Compartement 1Compartement 2ncrit = ncrit = ncrit = 13,30 min-1 ncrit = 23,57 min-Operating mill speedn = Compartement 1Compartement 2n= n= n= 9,975 min-1 n= 17,68 min-1

Net Driving Power

Compartement 1 P = c .Q Di. NP= 0,221 . 33,521. 3,18. 9,975P = 234,990 kWCompartement 2 P = c .Q Di. NP= 0,213 . 83,9725. 3,22. 17,68P = 1018,251 kW