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 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.
Technical Details of Grate Ball Mill
| 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 |
