How to Replace the Ball Mill Liner?

Ball mill is an indispensable equipment in the beneficiation operation, because it is necessary to grind the ore to a suitable particle size to extract high-grade concentrate from the ore. Needless to say, choosing a suitable ball mill, from the pre-purchase consultation, to the smooth installation of the ball mill, the test run, takes a lot of time and effort. Moreover, the price of ball mills is relatively expensive among many mineral processing equipment. Therefore, after successfully purchasing a billiard mill, it is necessary to carry out daily maintenance and servicing of the ball mill, and the replacement of the ball mill liner is one of the essential maintenance work.

Under normal conditions, if it is not improperly operated and maintained, the ball mill will not be easily damaged. Of course, the ball mill will work for a long time, and the barrel and the lining of the ball mill will also wear. When the lining wear depth is serious, which will seriously affect the efficiency and safe operation of the ball mill. At this time, it is necessary to replace the new ball mill liner. The ball mill liner is intended to protect the barrel of the ball mill in order to reduce and avoid direct impact and friction of the body and abrasive minerals on the barrel of the ball mill. The form of the ball mill liner is not uniform. Different types of liners can be used to adjust the movement state of the grinding body, improve the efficiency of the grinding operation of the ball mill, and reduce the consumption of metal. Therefore, the protection effect of the ball mill liner on the ball mill cannot be ignored. Xinhai mining company’s dressing experts with more than 20 years of mineral processing experience believe that when the wear of the ball mill liner is very serious, replacing the ball mill liner is an effective method to solve the problem of liner wear. So, how do you replace the liner of the ball mill? Next, we will briefly explain the correct ball mill liner replacement method from the entire process of ball mill liner replacement.

1. Before installing the ball mill liner, you need to understand the performance of the ball mill liner, consider the material and shape of the liner, wear resistance, impact resistance, etc., and choose the appropriate liner of the original ball mill to replace it. Xinhai mining experts suggest that new ball mill liners can be ordered from the original manufacturer.

2. The replacement of the ball mill liner requires a commanding expert to arrange and coordinate the entire replacement process. Moreover, all ball mill workers need to understand work drawings and disassembly as well as installation requirements, and need to acquire proficiency in operation of the entire process.

3. It is necessary to circulate the remaining pulp in the ball mill as much as possible, remove the rubber pad of the waste liner, clean the protruding point of the wall of the ball mill, and remove dust and descale the cylinder. When cleaning the work, it is necessary to fix the barrel of the ball mill. The work shop needs to have good ventilation conditions and suitable temperature. Then the installer can enter the ball mill barrel to start the operation.

4. When removing the old ball mill liner, first remove the used lining screws, then remove the old ball mill liner one line after one line, and then lift the used ball mill liner. When removing the liner, the personnel should pay attention to safety and pay attention to the standing position to avoid being injured by the ball mill liner.

5. The size of the ball mill is large, and it is necessary to carry out lifting work during the process of replacing the ball mill liner. The hoisting ball mill liner is responsible for the hoisting work, and the lifting process needs to pay attention to the operation of the wire rope and the hook.

6. The new liner of the ball mill should be installed to ensure that the gap during the period is within the required range. Fix the spiral of the ball mill liner. Carefully seal the packing and gasket to prevent leakage of mineral powder. If there is no gasket, it should be wrapped around the corresponding position. Two rounds of cotton cord or hemp plus lead oil. At the same time, it is necessary to apply a layer of cement mortar on the inner wall of the cylinder, and screw it tightly before solidification. It should be noted that the thin end of the step liner should be consistent with the direction of the arrow in the direction of rotation of the mill.

7. After the replacement, the ball mill staff needs to confirm that there is no person, no working tools and other needless things in the cylinder, and it is necessary to carefully check the inside and outside of the cylinder before closing the empty cover.

The replacement of the ball mill liner is a very cumbersome and technically high-quality work. In addition to the above mentioned replacement techniques, it’s particularly necessary and important to guarantee the personal safety of operation workers. Correct ball mill liner replacement operation can improve the use time of the ball mill and ensure the safe operation of the ball mill. In order to improve the safety factor in the use of the ball mill, Xinhai mining and dressing Experts suggest that the replacement process of the entire ball mill liner should be properly guided and participated by the technicians of the ball mill manufacturer.