This is a grate ball mill

Grate Ball Mill

Applications: It is mainly used in cement, silicate, new building materials, refractory materials, fertilizers, glass ceramics and other industries, as well as the grinding of various ores and other hard materials.

Grate Ball Mill Details

Grate ball mill (grate discharge ball mill) is a ball milling machine used to grind various ores and other materials. Grate type ball mill is a traditional ball milling equipment for forced ore discharge by ore discharge grate.

Its basic structure and grinding process are basically the same as the overflow type ball mill, but the structure of the ore discharge part is different. The discharge end of the grate discharge ball mill is equipped with a grate liner, and the material is discharged through the grate liner.

The characteristic of its discharge method is forced discharge, so the production capacity is higher. Grate discharge type ball mill has a higher processing capacity, but the product size is relatively coarse (0.2-0.3mm), suitable for the first stage of grinding operations.

The grinding steel ball inside the barrel of the grate ball mill is filled in accordance with different sizes and proportions. When the grinding ball is lifted to a certain height during the operation of the mill, the drop difference with the pulp surface is larger. Therefore, the impact of the steel ball on the material is strong, the crushing effect of the material is large, the grinding effect is better.

Grate discharge ball mill
Grate discharge ball mill
Grate type ball mill
Grate type ball mill

Working Principle Of Grate Ball Mill

Grate ball mill is mainly composed of barrel part, feeding part, discharging part, bearing, transmission system and lubrication system.

After the grate type ball mill starts, the material is fed into the barrel through the feed end, and the barrel then rotates around the horizontal axis according to a certain speed. At the same time, under the action of centrifugal force and friction force, the material is brought to a higher place, and then free-falling and throwing motion are carried out. Finally, the material is crushed under the combined action of grinding medium and cylinder.

The ground product is discharged through the discharging part. The discharging end of the grate ball mill is provided with a grate liner, on which there are many small holes for discharging. After the grinding operation is completed, the ore pulp is lifted to a higher level than the ore discharge opening through the grate liner and the fan-shaped chamber leading to the ore discharge opening, so that the ore pulp is discharged from the grate ball mill.

Working principle of grate ball mill
1-Barrel 2-Liners 3-Rack wheel 4-Ore discharge grate 5-Feeding device

Product Advantages of Grate Ball Mill

  • The grate discharge ball mill has a fast ore discharge speed, which can reduce the over crushing of crushed stone and increase the output per unit volume.
  • The grate discharge ball mill has the advantages of high installation accuracy, simple operation and installation, and short cycle.
  • The grate discharge type ball mill equipment runs smoothly, reduces the downtime of the mill and improves the efficiency.
  • In the working process of grate discharge ball mill, the power consumption can be reduced to 25-35%, which greatly reduces the production cost for customers and improves the comprehensive benefits of the enterprise.

Technical Data

Specification(mm) Capacity(t/h) Output Size(mm) Rotate Speed(r/min) Grinding Media Load(t) Motor Power(kW) Weight(t)
φ900×1800 0.65-2 0.075-0.89 36 1.5 18.5 5.85
φ900×3000 1.1-3.5 0.075-0.89 38 2.7 22 6.98
φ1200×2400 1.5-4.8 0.075-0.89 36 3 30 13.6
φ1200×4500 1.6-5.8 0.074-0.4 32.4 5 55 15.6
φ1500×3000 2-5 0.074-0.4 29.7 7.5 75 19.5
φ1500×5700 3.5-6 0.074-0.4 27 12 130 25.8
φ1830×3000 4-10 0.074-0.4 25.4 11 130 34.5
φ1830×6400 6.5-15 0.074-0.4 24.1 21 210 43
φ2100×3000 6.5-36 0.074-0.4 23.7 15 155 45
φ2100×7000 12-48 0.074-0.4 23.7 26 280 59.5
φ2200×4500 9-45 0.074-0.4 21.5 27 280 54.5
φ2200×6500 14-26 0.074-0.4 21.7 35 380 61
φ2200×7000 15-28 0.074-0.4 21.7 35 380 62.5
φ2200×7500 15-30 0.074-0.4 21.7 35 380 64.8
φ2400×3000 7-50 0.074-0.4 21 23 245 58
φ2700×4000 22-80 0.074-0.4 20.7 40 380 95
φ2700×4500 26-90 0.074-0.4 20.7 48 480 102
φ3600×8500 45.8-256 0.074-0.4 18 131 1800 260
φ4000×6000 65-248 0.074-0.4 16.9 146 1600 242
φ4500×6400 84-306 0.074-0.4 15.6 172 2000 280
φ5030×8300 118-500 0.074-0.4 14.4 266 3300 403
φ5500×8500 148-615 0.074-0.4 13.8 338 4500 525
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