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gomine - Ball mill
Ball mill is the key equipment for secondary grinding after crushing. And it is suitable for grinding all kinds of ores and other materials, no matter wet grinding or dry grinding. Besides, it is mainly applied in many industries, such as ferrous&non-ferrous metal mine, building materials, chemical, electric power, coal, traffic, light industry, etc.According to different discharging ways, it can be divided into two kinds, grate type and overflow type.
Ball mill is one of the mostly used grinding equipment with high efficiency. It is also one of the most ancient mining machines in the world, while the efficient ball mill was created until the industrial revolution and the invention of steam power.
Ball mill is usually classified based on different aspects:
● Working method: √ dry grinding ball mill; √ wet grinding ball mill
● Discharging methods: √ grate discharge ball mill; √ overflow discharge ball mill
Usually, investors are hesitated to choose ball mills of dry grinding or wet grinding. Here are some tips.
Wet grinding is more used than dry grinding to grind raw materials. Most of the grindable metallic ore and nonmetallic ore can be processed by wet grinding if it doesn't react to water or the reaction influences the finished product quality.
These materials include copper ore, iron ore, gold ore, molybdenum ore, phosphate ore, feldspar ore, fluorite ore, etc.
While other materials like cement, marble and other building aggregates that react to water and will produce other kind of materials only need dry grinding. If the finished product is required to be stored and sold as powder, dry grinding is also the better choice.
Ball mill is extensively used in the production of cement, silicate, refractory materials, chemical products, black and nonferrous metal ore dressing, glass ceramics and other industrial products. In recent years, it is also used for artificial sand making in new building materials production.
All kinds of ore and other grindable materials process can be completed by ball mill for dry or wet grinding. Grinding of ball mill meets the high requirements for uniformity pf discharged products.
There are some examples of various ball mills used in different industrial fields.
1. Cement ball mill
Cement ball mill is also shortened as cement mill. It is the main equipment in cement industry with high grinding efficiency, capacity and low energy consumption. Cement mill has superiority in grinding slag cement.
2. Coal ball mill
Coal ball mill is also one kind of ball mill that used to mill raw coal. Usually, to be simplified, we call it coal mill. To improve the burning efficiency, coal need to be ground by coal mill and then used in the pulverized coal-fired boiler. And to prevent casting from burning on or to decrease the surface roughness, high-quality coal dust produced by coal mill is added in the iron casting process.
Main bearing performs well
The traditional sliding bearing is replaced by large-diameter double-row adjustable roller bearing. This has reduced friction and lowered the energy consumption. It is easier to start the ball mill.
Simple structure and stable operation
There are two kinds of feeding device, combined feeder and drum-shaped feeder. They are installed separately, which is structured simpler. That there is no inertia impact makes ball mill perform more stable and has reduced the maintenance time as well as improved the efficiency.
High anti-bending strength of gears
Profile shifted gear is adopted by the new type of ball mill to avoid undercutting. And the anti-bending strength is improved greatly by over one time.
Long bearing life
The hollow shaft diameter of ball mill rolling bearing is enlarged, which increases the radial distance between the rolling bearing and the feeding and discharging screw barrel. This plays a certain role of heat insulation and cooling and extends the service life of the bearing.
Ball mill is mainly composed of feed port, discharge port, grinding media, grinding cylinder, transmission department, liner, etc.
The hollow shaft is made of cast steel and the inner cylinder is set with a wear-resistant lining plate, which assures a long service life of this machine. Besides, the ball mill is easy to maintain for that the inner lining can be removed and replaced. Gear-hobbing-structured rotary gear ensures a smooth-rolling during the operation.
1. The material uniformly enters the first chamber of the ball mill by the feeding device through the hollow shaft. The chamber has stepped lining or corrugated lining, which is filled with steel balls of different specifications.
2. Then the rotation of the grinding cylinder generates centrifugal force to bring the grinding media to a certain height. After falling, they hit and grind the material.
3. When the material is coarsely ground in the first warehouse, it enters the second warehouse through a single-layer compartment board. This warehouse is provided with a flat lining plate with steel balls inside to further grind the material.
4. The powder is discharged through the discharge raft to complete the grinding operation.
Henan gomine Industrial Technology Co.,Ltd is a famous industrial company in the world, which is focusing on the provision of aggregate stone crusher machine, industrial raymond mill powder, briquette machine, Ore Beneficiation Machine, technology upgrading and systematic solutions.