... Feeding moisture: ≤0.5%, Feeding temperature:≤50, Wind speed in mill,1.1-1.2m/s, Specific surface ... area:≥420m2/kg3. Rotary speed of mill: 18.7 r/min4. Charging ... Plant)Model: YR1600-8/1430, Power: 1600kw, Rotary speed: 743 r/min, Voltage: 10 kv6. Main reducer: ... Model: MBY900, Hardened gear surface ( Nanjing High-speed Gear box plant )7. Auxiliary motorModel: YEJ225M-8, ...