Marcy 12 x 14 ft

12 x 14 ft Marcy Ball Mill with 1500 HP
– Two complete mills available
– One mostly complete
– Additional spare heads and components available
MIll:
– Grate Discharge – Type R.H.
– Gear – SIngle Helical R.H. 256T, 1.25 D.P., 21″ face
– Pinion – Single Helical L.H. 18T, 1.25 D.P., 21″ face
– Air Clutch – Fawick 38 VC 1200
– 290,800 Lbs mill only
– 191,500 Lbs Grinding Charge
Motor:
– 1500 HP G.E. Synchronous, 240 RPM
– 4000 V, 3 PH, 60 HZ
– Type TS
– 30 poles
– Arm Amp 214
– Field Volt 250
– Field Amp 75
– PF 8
– Insul Class B
– Temp Rise C = 70 @ 4500′ Alt
– Air Gap 150
During September and October of 1913, F.E. Marcy undertook tests at the Butte and Superior Plant in Butte, Montana, to compare cylindrical and conical mills on a laboratory scale. The results convinced Marcy that cylindrical mills were the future of mining and propelled his company and the Marcy ball mills into an increasingly competitive market for mineral grinding equipment. Marcy saw that all overflow discharge mills tended to overgrind their mineral content, leading to unnecessary sliming. He worked to improve size reduction through better hydraulic classification circuits and became known for the specialized discharge grates his company pioneered.