Air Swept Coal Mill Wind-Swept Coal Mill OF Ore Grinding Mill
1. Working principle of wind-swept coal grinding of ore grinding
mill
The raw coal is fed into the drying bin of the mill by the slip of
the feeding device. The hot air with the temperature of about 350℃
also enters the mill through the air inlet pipe to dry the raw
coal. After drying, the coal enters the grinding bin through the
bin board and is crushed under the impact and grinding of the
grinding body (steel ball). At the same time, the gas formed by the
special exhaust fan takes the pulverized coal out of the mill
through the discharging device.
2. Product description of wind-swept coal mill of ore grinding mill
(1) Air swept mill | air swept coal mill specifications:
φ4×8 3.5m = cylinder diameter × cylinder effective length drying
bin length.
(2) Development process of wind-swept coal mill
From the past φ2.2m, φ2.8m, φ3m, φ3.2m, etc., the development of
the current φ3.8m, φ4m, etc. Equipment capacity from 500T /d,
700T/D, 1000T /d, 2500T/D, 5000T /d, 6000T /d.
3. The wind sweep | wind swept coal grinding technology features
are:
(1) The transmission forms of drum mill are edge leaflet, center
transmission, multi-point meshing edge transmission and other
transmission types; Drive form of induction motor + reducer +
pinion + big gear and synchronous motor + air clutch + pinion + big
gear;
(2) Generally, the support mode of two-terminal static and dynamic
pressure bearing is adopted, and the fully enclosed self-aligning
1200 line contact 'rocker type' bearing is adopted. The static and
dynamic pressure support mode of single sliding shoe, double
sliding shoe or full static pressure support can also be adopted.
(3) Large open gear adopts standard design, equipped with a
reliable sealing gear cover, and equipped with automatic glycerine
spray lubrication device;
(4) The cylinder is a key part of the mill, and the finite element
analysis is carried out on it by computer to ensure its
reliability;
(5) large and medium mills are equipped with slow driving device;
(6) large and medium mills are equipped with high and low pressure
lubrication stations;
(7) Control and protection system adopts PLC control.
4. Product parameters
The wind swept | wind swept coal grinding technology parameters:
| SPEC(diameter×length) | Rev
(r/min) | Feed size(mm) | Production capacity(t/h) | Load of grinding media
(t) | Main motor | Main reducing gear | Weight
(t) |
| Type | Power (kw) | Re(rpm) | Type | Speed ratio |
| φ2.2×4.4 | 22.4 | ≤25 | 8～9t/h | 18t | YRKK4501-6 | 250 | 986 | ZD60-11 | 6.3 | 36.7 |
| φ2.2×5.8 | 22.4 | ≤25 | 5.5～7 | 23.5～25 | Y4005-8 | 280 | 750 | ZD70-10 | 5.6 | 45 |
| φ2.4×4.75 | 21.2 | ≤25 | 14 | 22～24 | YR4501-8 | 315 | 740 | ZD60-8 | 4.5 | 49 |
| φ2.4×4 2 | 20.2 | ≤25 | 10～11 | 19 | YRKK450-8 | 250 | 740 | ZDY355 | 4.5 | 60 |
| φ2.4×4.5 2 | 20.2 | ≤25 | 10～12 | 20.8 | YRKK500-8 | 280 | 740 | JDX45 | 4.5 | 68 |
| φ2.6×(5.25 2.25) | 19.7 | ≤25 | 9～10 | 28 | YRKK500-8 | 400 | 740 | ZDY450 | 4.5 | 87.4 |
| φ2.8×(5 3) | 18.7 | ≤25 | 13～13.5 | 32 | Y5001-8 | 500 | 740 | JDX560 | 4.5 | 102 |
| φ2.9×4.7 | 19.1 | ≤25 | 14～19 | 34.4 | YR560-8 | 500 | 743 | MBY560 | 5.6 | 79 |
| φ2.5×3.9 | 21 | ≤25 | 14 | 21 | JR138-8 | 280 | 740 | ZD70-9 | 5 | 49.5 |
| φ3×(6.5 2.5) | 18.3 | ≤25 | 17～19 | 43 | YRKK5603-8 | 630 | 740 | MBY560 | 5 | 120 |
| φ3.2×4.8 | 16.7 | ≤25 | 20 | 48 | YR630-8 | 630 | 740 | MBY560 | 5 | 118 |
| φ3.2×(6.5 2) | 16.9 | ≤25 | 20 | 50 | YRKK560-8 | 710 | 740 | JDX630 | 5 | 137 |
| φ3.5×8 | 17.2 | ≤25 | 55～60 | 80 | YRKK710-8 | 1000 | 740 | MBY800 | 6.3 | 182 |
| φ3.8×(7.75 3.5) | 16.7 | ≤25 | 85 | 85 | YRKK710-8 | 1400 | 740 | JDX90-WX-2A | 5.6 | 215 |
