Ball mill is an economical tool for grinding several materials into fine powder. The ball mill is employed to grind several types of mine and different materials, or to pick the mine. it's widely utilized in building material, chemical trade, etc. There are 2 ways in which of grinding: the dry method and also the wet method. It may be divided into tabular sort and flowing sort in line with completely different sorts of discharging material. Ball mill is usually used to grind material 1/4 in. and finer, all the way down to the particle size of twenty to seventy five microns. to realize an affordable potency with dry ball mills, they have to be operated during a closed system, with oversize material continuously being recirculated back to the mill to be reduced. varied classifiers, like screens, spiral classifiers, cyclones and air classifiers are used for classifying the discharge from dry ball mills.
1. add acoustic shield
The technique is to cover up the roller of Ball Mill ( Size 4000 X6500) Of China/Ball Mill For Grinding Barite, the cover shell is made of metal. In order to achieve noise reduction effect, the inside is lined with sound-absorbing materials, noise reduction can reach 15 ~ 20dB. However, when using this method, large area is required, also there is much trouble in the maintenance and overhaul of equipment, the acoustic shield needs to be disassembled, which increases the workload of maintenance and overhaul.
2. set elastic layer at the bottom of the lining boards
The method is to eliminate the rigid connection between the liner and roller, after successful installation, noise reduction can reach more than 15dB. However, this method is not easy to handle, because the elastic layer itself is a vibration system. the impact of steel ball will change with the natural frequency of the liners, resulting in a greater amplitude. Only when vibration noise frequency is greater than the liner natural frequency will has a good effect. It would be counterproductive if the installation is not good, and the cost is very high.
3. simple dressing
This method uses blankets and other sound-absorbing materials to make curved partition plate fastened with bolts. but the bolts are not wrapped so it is convenient to repair. Because the absorption capacity of blankets and other materials for the low frequency noise is not strong, so the noise reduction of this method can only reach about 10dB, noise-isolation effect is not very satisfactory and the cost is higher than the method of adding acoustic shield. However, this method is convenient for maintenance and overhaul, and also does not affect the steel ball loading and other work.
Henan Fote Heavy Machinery is one of the leading manufacturers in producing high efficiency and energy-saving mining machinery in China. We mainly provide ball mills, stone crushers, magnetic separators, flotation machines, pelletizers, vibrating feeders, vibrating screens, sand-washing machines, belt conveyors, rotary dryer machine, rotary kilns and so on. Welcome to visit and order.
Contact Infomation
Email: info@sinoftm.com
Website: http://www.ftmmining.com/products/Ball-mill.html
Address: High and New Industrial Zone, Kexue Revenue, High and New Technology Industrial Development Zone, Zhengzhou, China
Post by cherry hong Manufacturing & Processing Machinery @2015-06-23 16:34:46