Technical parameters ofφ3.2×9m coal mill
一、Main technical parameters & performances
1. Sepc.：φ3.2×(6.75+2)m
2. Length of drying chamber：2m
3. Length of grinding chamber：6.75m
4. Grinding material: blind coal
5. Capacity：20-22t/h
6. Mill inlet raw coal grian size ≤25mm，Residue 2%, mill outlet coal powder fineness:80μm
7. Mill inlet raw coal moisture content≤12%，Outlet coal powder moisture content≤1%
8. Mill inlet air temperature <350℃ Mill outlet air temperature: 60-80℃
9. Rotating speed of mill：17.3r/min
10. Transmission type: edge driving
11. Max. ball load：54t
12. Filling rate：23.5%
13. Cooling water consumption of main bearing：2m3/h
14. Cooling water consumption of slide shoe bearing：3.5m3/h
15. Water consumption of thin oil station of main reducer: 5.7m3/h
16. Water consumption of lubrication device of slide shoe bearing: 3.8m3/h
17. Water consumption of lubrication device of main bearing: 1.5m3/h
18. Main motor： Type YRKK560-8 IP54
Power：710KW，
Motor voltage10KV
Rotating speed at full load: 741r/min
19. Main reducer： Type JDX630
Speed ratio：5
Input rotating speed：741r/min
20. Slow driving motor： Type Y200L-8 IP44 Power 15KW
Rotating speed at full load：730r/min Voltage：380V
21. Slow driving reducer： Type ZSY250-90-I Speed ratio：I=90
Disc rotating speed：19r/min Input rotating speed：730r/min
22. Cooling type: water cooling
23. High/Low pressure oil station of main bearing：XGD-A2.5/25
（1）Low pressure system：
Flow rate 25L/min
Oil supply pressure：0.5MPa
Oil supply temperature：40±3℃
Motor：Y90L-4 1.5kW
（2）Hihg pressure system：
Flow rate：3.5 L/min
Oil supply pressure：32MPa
Motor：Y100L1-4 2.2kW
（3） Oil electrical heater SRYZ-220/2 Power 2kW Voltage 220V
（4） Differential pressure transmitter CS-V-0.155W 220V，0.25A
24. High/Low pressure oil station of slide shoe bearing：XGD-A2×2.5/63
（1） Low pressure system：
Flow rate：63L/min
Nominal pressure：0.63MPa
Motor Y112M-6 Power2.2kW Rotating speed：940r/min Voltage380V
（2） High pressure system
Flow rate：2.5L/min
Nominal pressure：32MPa
Motor Y100L1-4 Power 2.2kW
（3） Oil cooler GLC3-10/0.63 Cooling area：10m2
Nominal pressure：0.63MPa Rotating speed：1430r/min Voltage 380V
（4） Differential pressure transmitter：CS-Ⅲ Power：0.055kW Voltage：220V
（5） Electrical heater：SRYZ-220/3 Power：3KW Voltage：220V
25. Total equipment weight：-t
( Total equipment weight is 129t except motor and reducer).
二、 Main spare parts and material quality
1、 Main motor YRKK560-8 710kW 10KV
2、 Main reducer JDX630-5
3、 Shell Q235-B δ=30mm Entire annealing
4、 Slide ring 20g-Z25
5、 Hollow shaft ZG230-450
6、 Main bush： Lower part HT250
Bush body HT250
Bush liner（巴氏合金Babbitt ZchSnSb11-6）
Bump ball base：34CrNi3MoA/45
Idler roller：45
7、 Liner: Chromium alloy
8、 Thin oil station XGD-A2.5/25/XGD-A2×2.5/63
9、 Control cabinet & start cabinet
三、 Supply range
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1、 Rotary section |
1set |
|
2、 Feed device |
1set |
|
3、 Main bearing device |
1set |
|
4、 Slide shoe bearing device |
1set |
|
5、 Discharge device |
1set |
|
6、 Liner & diaphram |
1set |
|
7、 Transmission device (bull gear, pinion & transmission base, etc. ) |
1 set per pc |
|
8、 Main motor |
1pc |
|
9、 Main reducer |
1pc |
|
10、 Auxiliary motor |
1pc |
|
11、 Auxiliary reducer |
1 pc |
|
12、 Coupling |
1 set per pc |
|
13、 Base of motor & reducer |
1 set per pc |
|
14、 Thin oil station |
2 pcs |
|
15、 Gear cover |
1 pc |
|
16、 Control cabinet (full high pressure control, low pressure start, thin oil station control) |
1 pc |
Jiangsu Pengfei Group Co., Ltd
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