perhitungan waktu tinggsl vrm
DESCRIPTION
Waktu tinggal material dalam VRMTRANSCRIPT
Perhitungan Vertical Roller MillData :
5 m
Weight of 1 roller57 Ton
559 kN
3 mW 1 mSpeed Table 25 rpm
Hydraulic silinder 0.1039Capacity 400 t/hMill motor 3200 kWHidraulic pressure 160 BarGrinding bed Thickness (H) 80 mmπ 3.14
Gidraulic cylinder0.42 m0.21 m
Mill motor 3200 kW
ρp 2000
Perhitungan :
T 2,220.688 kN
740.229 µ 0.092
ρmax = 4 x KT/µ 10,771.813
0.708 N' = 1/3 xρmax x (F-1)/ρp 1.272 KJ/kg
0.353 kWH/TonC = (N/P)/N' 22.647 kali
Contoh 1 Jika di asumsikan:C 15 kaliHydraulic Pressure 160 Bar
ρp 2000N 8 kWH/Ton
D0
DR
56/D0.5
m2
kg/m3
Specific Grinding Pressure (K T)
KT = T/ (W. D1)
T = ¼ π (0.422-0.212) x 160 x100x559
µ = N/(0.844 x KT x D02.5)
KT kN/m2
kN/m2
F-1 = ¼ x DR/H x µ2
kg/m3
Maka :N' = (N/P)/C 0.53 kWH/Ton/putaranρmax = 3 x N' x ρp/(F-1) 4,517.56 kJ/kg
16,263.21 KWh/tµ = δ/3 = (4 x KT/ ρmax)/3 0.06
Contoh 2 Jika di asumsikan:C 15 kaliHydraulic Pressure 180 Bar
ρp 2000N 8 kWH/Ton
Maka : 35.10 mm
2,119.50 kWP = N/N' 264.94 Ton/hr
Retention time :
400 T/hr
0.150 m15 cm
6 m
Density 1000
33.54 sec
kg/m3
H = ¼ x DR x δ2/ (F-1)
N = µ x (0.844 x KT x D02.5)
Mill capacity (P =7 x D02.5)
Material layer thickness (3% D0)
Diameter nozzle Ring (1.2 x D0)
Kg/m3
t retention : H x D00.5
80 bar
T pada Pressure 80 bar 1,389.844 kN
463.281 0.146 standart not higher than (0.11-0.12)
kN/m2
Perhitungan Vertical Roller MillData :
5 m
Weight of 1 roller57 Ton
559 kN
3 mW 1 mSpeed Table 25 rpm
Hydraulic silinder 0.1039Capacity 400 t/hMill motor 3200 kWHidraulic pressure 160 BarGrinding bed Thickness (H) 80 mmπ 3.14
Hidraulic cylinder0.42 m0.21 m
Mill motor 3200 kW
ρp 2000
Perhitungan :
T 2,220.688 kN
740.229 µ 0.092 standart not higher than
ρmax = 4 x KT/µ 10,771.813
0.708 N' = 1/3 xρmax x (F-1)/ρp 1.272 KJ/kg
0.353 kWH/TonC = (N/P)/N' 22.647 kali
Contoh 1 Jika di asumsikan:C 15 kaliHydraulic Pressure 160 Bar
ρp 2000N 8 kWH/Ton
D0
DR
56/D0.5
m2
kg/m3
Specific Grinding Pressure (K T)
KT = T/ (W. D1)
T = ¼ π (0.422-0.212) x 160 x100x559
µ = N/(0.844 x KT x D02.5)
KT kN/m2
kN/m2
F-1 = ¼ x DR/H x µ2
kg/m3
Maka :N' = (N/P)/C 0.53 kWH/Ton/putaranρmax = 3 x N' x ρp/(F-1) 4,517.56 kJ/kg
16,263.21 KWh/tµ = δ/3 = (4 x KT/ ρmax)/3 0.06
Contoh 2 Jika di asumsikan:C 15 kaliHydraulic Pressure 180 Bar
ρp 2000N 8 kWH/Ton
Maka : 35.10 mm
2,119.50 kWP = N/N' 264.94 Ton/hr
Retention time :
400 T/hr
0.150 m15 cm
6 m
Density 1000
33.54 sec
kg/m3
H = ¼ x DR x δ2/ (F-1)
N = µ x (0.844 x KT x D02.5)
Mill capacity (P =7 x D02.5)
Material layer thickness (3% D0)
Diameter nozzle Ring (1.2 x D0)
Kg/m3
t retention : H x D00.5
standart not higher than (0.11-0.12)
