Coal Mill

Coal mill is one of the four auxiliary engines of a thermal power station. It is the main equipment of the pulverized coal preparation system and mainly used for grinding coal of multiple hardness. It is also suitable for coal and ore raw materials in cement, metallurgy and chemical industries. The special steel ball coal mill for power plants is a new type of equipment, which is widely used in thermal power plant equipment.

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Coal Mill
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Why FTM Coal Mill ?

Coal mill is mainly used for grinding limestone, cement clinker, clay, bauxite, active lime, aluminum hydroxide, and other materials and widely used in coal and ore raw material milling systems in cement, metallurgy and chemical industries. The feed port of the machine is available in size: ≤25mm.

The raw coal enters the feeding device of the mill from the feeder equipment, and the hot air having a temperature of about 300 °C also enters the feeding device through the air inlet pipe. A special lifting plate is arranged in the drying chamber to raise the raw coal so that the raw coal is subjected to intense heat exchange here to be dried. The dried coal block enters the grinding chamber through a double-layer compartment plate with a lifting plate, and the grinding chamber is provided with steel balls. The coal block is pulverized and ground into pulverized coal in the chamber. At the same time that the coal block is pulverized, the pulverized coal powder and gas are taken out of the mill together by a special draft fan through the discharge device of the mill. The coarser particles are returned to the powder through the return screw of the discharge device and ground again in the grinding chamber.

Technical Data

Model Shell rotation speed
(r/min)
Ball load
(t)
Feeding size
(mm)
Discharging size
(mm)
Capacity
(t/h)
Motor power
(kw)
Total weight
(t)
Ф900×1800 36-38 1.5 <20 0.075-0.89 0.65-2 18.5 5.85
Ф900×3000 36 2.7 <20 0.075-0.89 1.1-3.5 22 6.98
Ф1200×2400 36 3 <25 0.075-0.6 1.5-4.8 30 13.6
Ф1200×3000 36 3.5 <25 0.074-0.4 1.6-5 37 14.3
Ф1200×4500 32.4 5 <25 0.074-0.4 1.6-5.8 55 15.6
Ф1500×3000 29.7 7.5 <25 0.074-0.4 2-5 75 19.5
Ф1500×4500 27 11 <25 0.074-0.4 3-6 110 22
Ф1500×5700 28 12 <25 0.074-0.4 3.5-6 130 25.8
Ф1830×3000 25.4 11 <25 0.074-0.4 4-10 130 34.5
Ф1830×4500 25.4 15 <25 0.074-0.4 4.5-12 155 38
Ф1830×6400 24.1 21 <25 0.074-0.4 6.5-15 210 43
Ф1830×7000 24.1 23 <25 0.074-0.4 7.5-17 245 43.8
Ф2100×3000 23.7 15 <25 0.074-0.4 6.5-36 155 45
Ф2100×4500 23.7 24 <25 0.074-0.4 8-43 245 56
Ф2100×7000 23.7 26 <25 0.074-0.4 12-48 280 59.5
Ф2200×4500 21.5 27 <25 0.074-0.4 9-45 280 54.5
Ф2200×6500 21.7 35 <25 0.074-0.4 14-26 380 61
Ф2200×7000 21.7 35 <25 0.074-0.4 15-28 380 62.5
Ф2200×7500 21.7 35 <25 0.074-0.4 15-30 380 64.8
Ф2400×3000 21 23 <25 0.074-0.4 7-50 245 58
Ф2400×4500 21 30 <25 0.074-0.4 8.5-60 320 72
Ф2700×4000 20.7 40 <25 0.074-0.4 22-80 380 95
Ф2700×4500 20.7 48 <25 0.074-0.4 26-90 480 102
Ф3200×4500 18 65 <25 0.074-0.4 As per process conditions 630 149
Ф3600×4500 17 90 <25 0.074-0.4 As per process conditions 850 169
Ф3600×6000 17 110 <25 0.074-0.4 As per process conditions 1250 198
Ф3600×8500 18 131 <25 0.074-0.4 45.8-256 1800 260
Ф4000×5000 16.9 121 <25 0.074-0.4 45-208 1500 230
Ф4000×6000 16.9 146 <25 0.074-0.4 65-248 1600 242
Ф4000×6700 16.9 149 <25 0.074-0.4 75-252 1800 249
Ф4500×6400 15.6 172 <25 0.074-0.4 84-306 2000 280
Ф5030×6400 14.4 216 <25 0.074-0.4 98-386 2500 320
Ф5030×8300 14.4 266 <25 0.074-0.4 118-500 3300 403
Ф5500×8500 13.8 338 <25 0.074-0.4 148-615 4500 525

Advantages

Energy Efficient: The coal mill has been improved on the basis of traditional equipment, the output has been greatly improved, the discharge powder is finer, and the operation is more stable.

It is a new type of energy-saving grinding equipment. High Yield: The feeding device of the coal mill adopts the louver type structure with oblique inlet and oblique feeding, which makes the feeding smoother; the discharging device adopts the curved tube structure, and the discharging is not blocked, which improves the production capacity.

Continuous Operation: Compared with the traditional mill, the coal mill can work continuously in the harsh environment, which is 4-6 hours longer than the original mill, and brings considerable benefits to the customers.

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