The tubular coal mill is mainly used for pulverizing various hardness coal in thermal power plants, which is high adaptable, reliable operation and easy maintenance.
The tubular coal mill is driven by motor which rotate the tube through the rod-pin coupling, cylinder gear reducer and open big gear decelerating to drive. The grinding medium (steel ball) is filled in the tube of mill. When the tube is rotating the steel ball is lifted to a certain height by the centrifugal force and friction force, and then falls down by its own gravity. The coal inside tube is knocked and grinded by the falling steel ball. The coal pulverized is blown by the pneumatic equipment into the boiler for combustion or coal bunker for storage.
The static and dynamic lubrication is that the high-low pressure oil pump is also started simultaneously before the coal mill starts. In the critical situation the oil flow with high pressure enters the shaft through the hydrostatic pipeline, and float-lifts the coal mill rotation part to form the oil film on the shaft in order to improve the lubrication when the coal mill starts. When oil flow is continuously supplied by the low pressure after the coal mill starts the dynamic pressure lubrication is realized. The high pressure oil pump stop working after the mill normally rotates for 2-3 minutes, the shaft of coal mill is lubricated relay on the low pressure dynamic pressure lubricating.
| The Parameter Table |
| Type |
Diameter mm |
Length mm |
Rotation r/min |
Ball Quantities (Max) |
Feeding mouth Dimension （mm） |
Output （t/h） |
| Weight t |
Filling rate |
| MTZ 2126 |
2100 |
2600 |
22.81 |
10 |
0.236 |
Ф600 600 |
4 |
| MTZ 2133 |
3300 |
13 |
0.242 |
Ф650 650 |
6 |
| MTZ 2532 |
2500 |
3200 |
20.63 |
18 |
0.244 |
Ф750 750 |
8 |
| MTZ 2539 |
3900 |
20.77 |
22 |
Ф800 800 |
10 |
| MTZ—W 2935 |
2900 |
3500 |
19.34 |
26 |
0.239 |
Ф850 850 |
12 |
| MTZ 2935 |
| MTZ—W 2941 |
4100 |
30 |
0.236 |
14 |
| MTZ—W 2947 |
4700 |
35 |
0.24 |
Ф950 950 |
16 |
| MTZ 2947 |
| MTZ—W 3247 |
3200 |
4700 |
18.42 |
44 |
0.248 |
Ф1050 1050 |
20 |
| MTZ 3247 |
18.52 |
40 |
0.225 |
Ф1120 Ф1310 |
| 1120 1310 |
| MTZ—W 3258 |
5800 |
18.42 |
55 |
0.213 |
Ф1120 1120 |
25 |
| MTZ 3258 |
18.46 |
Ф1120 Ф1310 |
| MTZ 3257 |
5700 |
18.54 |
50 |
0.194 |
1120 1310 |
| MTZ 3560 |
3500 |
6000 |
17.57 |
59 |
0.217 |
Ф1300 Ф1450 |
30 |
| 1300 1450 |
| MTZ 3570 |
7000 |
69 |
0.218 |
Ф1350 Ф1550 |
35 |
| 1350 1550 |
| MTZ—W 3883 |
3800 |
8300 |
17 |
95 |
0.219 |
Ф1700 1700 |
50 |
| MTZ 3865 |
6500 |
75 |
0.2 |
Ф1574 Ф1700 |
40 |
| MTZ 3872 |
7200 |
85 |
0.205 |
1574 1700 |
45 |
| MTZ 3879 |
7900 |
95 |
0.21 |
|
50 |
| MTZ 3886 |
8690 |
105 |
0.213 |
|
55 |
