Ball Mill
Ball mill is the vital equipment for regrinding after primary crushing. It is extensively applied in cement, silicate products, new construction material, refractory material, chemical fertilizer, ferrous and non-ferrous metals beneficiation and glass ceramics industries. It is great choice for dry or wet grinding any kinds of minerals and other grindability materials. Ball mill is a widely used ultra-fine grinding mill in industrial production. Ball mill has a variety of types, according to different ways of discharging materials, ball mill could be in grate and overfall style. There are also tube mill, cone mill, etc.
The application of Ball mill:
Ball mill is applied to grind ores or other material, normally the size of final products is less than 35mesh.
Feeding applications of the ball mill:
- One section or multiple sections crushing and screening
- Crushing, screening, and rod milling
- Coarse crushing, autogenous grinding or semi-autogenous grinding
Suitable feeding material size:
- For hard ore, 80% should be smaller than 6mm
- For soft ore, 80% should be smaller than 25mm( some plants could afford bigger material size)
Two types of Commonly used ball mills:
The excellent SBM grind mill is based on its original design and super materials. SBM endeavor in optimizing every small detail to ensure high possible performance and reliability.
Grate type ball mill
At the discharging end of the Grate ball mill, the combination of grating plate with long holes and discharging liftout plate deliver the materials to the hollow shaft opening at the discharging end. The grating plate preserves the steel ball, inclusions and coarse materials.
Overfall type ball mill
The overfall type ball mill has an open-ended discharge opening. Since there is an ore pulp gradient between feeding end and discharging end of the ball mill, the final materials overflow from the hollow shaft. The anti-spin device on the liner plate of the hollow shaft keeps the steel ball in the mill.
Ore experiment of ball mill
There are three types experiment to test mill power. Under most circumstances, one of experiments is enough. First, it needs 5 pounds (2KG) samples for ball mill grindability test to get the specific energy ratio (Hp-hr/t). Or the specific energy ratio (Hp-hr/t) can be obtained according to bond work index.
Grinding circuit design of the ball mill
SBM engineers expect to help you design the circuit control and operate, optimize the mill. Productive grinding system is the achievement through the combined efforts of multiple disciplines, such as mechanic design, material metallurgy, technology design and instruments application, etc. ideal grinding outcome only could be obtained from refinement and delicacy design for every small detail.
The Working Principle
This ball mill is horizontal type and tubular running device, has two warehouses. This machine is grid type and its particular outside runs along gear. The material enters spirally and evenly the very first warehouse from the milling machine over the input material hollow axis by input material device. Within this warehouse , there exists a ladder scaleboard or ripple scaleboard, and various specification steel balls they covered the scaleboard, if the barrel body rotates after which produces centrifugal force ,at this time , the steel ball is carried tosome height and falls to make the fabric grinding and striking. After grinded coarsely inside the first warehouse, the information then enters into the second warehousefor regrinding with the steel ball and scaleboard. In the long run, the powder is discharged by output material board andthe end products are completed.
| Model | Speed of bucket (r/min) | Weight of ball | Size of
feed opening (mm) |
size of outputting feed (mm) | Production (t/h) | Power (kw) | Weight (T) |
| Ф900×1800 | 36~38 | 1.5 | ≤20 | 0.075-0.89 | 0.65-2 | 18.5 | 4.6 |
| Ф900×3000 | 36 | 2.7 | ≤20 | 0.075-0.89 | 1.1-3.5 | 22 | 5.6 |
| Ф1200×2400 | 36 | 3 | ≤25 | 0.075-0.6 | 1.5-4.8 | 30 | 12 |
| Ф1200×3000 | 36 | 3.5 | ≤25 | 0.074-0.4 | 1.6-5 | 37 | 12.8 |
| Ф1200×4500 | 32.4 | 5 | ≤25 | 0.074-0.4 | 1.6-5.8 | 55 | 13.8 |
| Ф1500×3000 | 29.7 | 7.5 | ≤25 | 0.074-0.4 | 2-5 | 75 | 15.6 |
| Ф1500×4500 | 27 | 11 | ≤25 | 0.074-0.4 | 3-6 | 110 | 21 |
| Ф1500×5700 | 28 | 12 | ≤25 | 0.074-0.4 | 3.5-6 | 130 | 24.7 |
| Ф1830×3000 | 25.4 | 11 | ≤25 | 0.074~0.4 | 4-10 | 130 | 28 |
| Ф1830×4500 | 25.4 | 15 | ≤25 | 0.074~0.4 | 4.5-12 | 155 | 32 |
| Ф1830×6400 | 24.1 | 21 | ≤25 | 0.074~0.4 | 6.5-15 | 210 | 34 |
| Ф1830×7000 | 24.1 | 23 | ≤25 | 0.074~0.4 | 7.5-17 | 245 | 36 |
| Ф2100×3000 | 23.7 | 15 | ≤25 | 0.074-0.4 | 6.5-36 | 155 | 42 |
| Ф2100×4500 | 23.7 | 24 | ≤25 | 0.074-0.4 | 8-43 | 245 | 42 |
| Ф2100×7000 | 23.7 | 26 | ≤25 | 0.074-0.4 | 8-48 | 280 | 50 |
| Ф2200×4500 | 21.5 | 27 | ≤25 | 0.074-0.4 | 9-45 | 280 | 45.5 |
| Ф2200×6500 | 21.7 | 35 | ≤25 | 0.074~0.4 | 14-26 | 380 | 52.8 |
| Ф2200×7000 | 21.7 | 35 | ≤25 | 0.074-0.4 | 15-28 | 380 | 54 |
| Ф2200×7500 | 21.7 | 35 | ≤25 | 0.074~0.4 | 15-30 | 380 | 56 |
| Ф2400×3000 | 21 | 23 | ≤25 | 0.074-0.4 | 7-50 | 245 | 54 |
| Ф2400×4500 | 21 | 30 | ≤25 | 0.074-0.4 | 8.5-60 | 320 | 65 |
| Ф2700×4000 | 20.7 | 40 | ≤25 | 0.074-0.4 | 12-80 | 400 | 94 |
| Ф2700×4500 | 20.7 | 48 | ≤25 | 0.074-0.4 | 12-90 | 430 | 102 |
| Ф3200×4500 | 18 | 65 | ≤25 | 0.074-0.4 | according | 800 | 137 |
If there is change of the above specification, it subjects to the newest products' specifications.
The most economic design of ball mill
SBM machinery designs and supplies whole sets of mining and rock crushing and screening equipment, we provide professional and considerate technical support all over the world, including equipment designing, selecting, purchasing, manufacturing, installation, etc. SBM could customize coarse crushing plants on request of each customer's demand. Feed arrangement, automation, unreserved service, cost-effectiveness control are all the reasons why SBM crushers could be most favorite mining equipment worldwide. Chat Now