Wear Mechanism and Preventive Measures of Ball Mill Liner

Ball mill liner is a kind of wear-resistant material for ball mill lining, because of its good wear resistance, impact resistance and corrosion resistance, it is widely used in mining, metallurgy, building materials and other industries. However, after long-term use, the ball mill liner will also wear, which will affect the grinding efficiency and equipment life. This article will introduce the wear mechanism and preventive measures of the ball mill liner.

Wear mechanism of 1. ball mill liner The wear mechanism of ball mill liner is mainly divided into abrasive wear and abrasive wear.

The grinding medium stirred in the ball mill contains abrasive particles, and the abrasive particles produce friction and collision with the ground ore, thus causing wear. In the wear process, the friction and impact force of the abrasive particles will generate pressure on the surface of the ball mill liner, causing the surface particles to loosen or fall off, forming abrasive pits, and further accelerating the wear.

Abrasive wear Abrasive wear refers to the cutting and impact of the ball mill liner under the grinding action of the hardness of the ore and the grinding medium. When the ore particles with high hardness are in contact with the surface of the lining plate, cutting force will be generated, resulting in cutting wear on the surface. When the collision force between the ore particles and the grinding medium is large, the impact force will be generated, which will cause the impact wear of the lining plate.

Preventive measures for 2. ball mill linings In order to reduce the wear of ball mill linings and extend their service life, the following preventive measures can be taken:

Select the appropriate ball mill liner material ball mill liner material selection directly affects its wear resistance. The appropriate lining material shall be selected according to the hardness of the ore, the size of the ore and the physical characteristics of the grinding medium. Commonly used ball mill liner materials are high chromium alloy cast iron, high manganese steel, these materials have good wear resistance and impact resistance.

Improving the hardness of the ball mill liner can improve its wear resistance by increasing the hardness of the ball mill liner. The lining plate can be treated by quenching, surface carburizing and other processes to improve its surface hardness. In addition, the hardness of the lining plate can be increased by the addition of alloying elements.

Strengthening the coating protection of the lining plate The wear-resistant coating and other coatings are coated on the surface of the ball mill lining plate, which can effectively improve the wear resistance of the lining plate. The coating can form a uniform protective film, reduce the direct contact of abrasive grains and abrasives to the liner, and play a role in reducing wear.

Controlling the operating parameters of the ball mill and properly adjusting the operating parameters such as the speed, feed particle size and suspension concentration of the ball mill can reduce the impact and friction of the grinding medium and ore on the lining plate. For example, reducing the suspension concentration can reduce the impact force, and increasing the feed particle size can reduce the friction force, thereby reducing the wear of the liner.

Regular inspection and maintenance Regular inspection of the wear of the lining board, timely detection and repair of severely worn parts, can extend the service life of the lining board. In addition, it is necessary to pay attention to clean up the debris and water in the ball mill, and keep the machine clean and dry to prevent the corrosion and damage of the liner by debris and moisture.

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