What to do if the sound of the ball mill is too loud when using it
The ball mill is a commonly used grinding equipment in the beneficiation plant, which plays a pivotal role in the beneficiation process. However, it has the disadvantages of high noise and short noise propagation distance. Not only will it seriously affect the working conditions of employees, but it will also harm their ears and seriously damage their physical and mental health. With the development of modern technology and the improvement of industrial noise pollution, it is very important to reduce the noise during the work of the ball mill through effective termination methods and create a quiet and comfortable production environment.
The ball mill will produce strong vibration and noise when grinding materials, the noise is as high as 100~115dB, which is harmful to the operator and the surrounding environment. The noise of the ball mill is very high, which has always been a concern for the users of the ball mill.
The noise of the ball mill is mainly caused by the collision between the metal balls in the drum, the cylinder wall liner and the processed materials. The sound radiates outward along the liner, the cylinder wall, and the inlet and outlet of the material, including the impact sound between the steel ball and the steel ball, the impact sound between the steel ball and the liner, the impact sound and friction sound of the material. The noise level of the ball mill is related to the diameter and speed of the ball mill, as well as the properties of the material and the block size. The noise of the ball mill is basically steady-state noise, which has a wide frequency band and high sound energy with low, medium and high frequency components. The larger the diameter, the stronger the low frequency component.
Noise reduction method of ball mill
- Add a soundproof cover to the ball mill
The soundproof cover can be divided into fixed type, movable type and curtain type. The fixed sound insulation cover has high sound insulation, but it will make the ventilation and heat dissipation performance of the workshop worse, and the maintenance and repair of the equipment will be difficult. On the basis of the fixed sound insulation hood, the movable sound insulation hood is improved and the maintenance performance is improved, but the sound insulation capacity is reduced, the ventilation and heat dissipation problems have not been solved, and it needs to occupy more space and space. The curtain-type sound insulation cover was developed to solve the contradiction between the large space occupied by the movable sound insulation cover and the venue, and it has the advantages of disassembly and assembly. The advantages of flexible installation and centralized storage are still poor ventilation and heat dissipation and high prices.
- Replace manganese steel lining with rubber lining
This method is one of the technical measures to radically reduce the noise generated by the cylinder based on the mechanism of the noise generated by the ball mill. The rubber liner is easy to install and has a good damping effect. When the bush is impacted by a steel ball, the impact duration can be increased, and the noise reduction effect is obvious. However, when choosing a rubber liner, attention should be paid to rubber plates with good high temperature resistance and wear resistance. At the same time, a heat-resistant soft rubber pad can be placed between the inner surface of the ball mill drum and the liner. In order to prevent the soft rubber pad from overheating, an industrial felt with a thickness of 10-15mm is placed between the liner of the ball mill and the soft rubber pad. The noise of the ball mill can be reduced below the allowable standard.
- Strengthen the ventilation, heat dissipation and noise reduction treatment of the ball mill equipment
The noise of the ball mill is not only related to the influence of the equipment itself, but also closely related to the production material itself. For many production materials, a large amount of heat is generated during the contact process of steel balls, which may directly affect the effect of noise reduction measures. Therefore, in the working process of the ball mill, attention should be paid to the ventilation and heat dissipation of the ball mill equipment, and the heat generated during the production process should be treated in time.
- Add the ball milling chamber
If conditions permit, concentrate the ball mill room in a special ball mill room, and change the ball mill room into a special soundproof room, the effect will be better than the soundproof cover. However, it is necessary to pay attention to solving the problems of monitoring, indoor heat dissipation and maintenance during the operation of the ball mill.