In a cone crusher, the crushing chamber is formed by the cavity between two linings: that is, the cavity between the fixed cone lining and the moving cone lining. It can be seen that the lining is the part that directly contacts the material and is also the main wear-resistant part in the cone crusher. Many users have reported that the lining of the cone crusher wears too quickly, which greatly increases the production cost. Today, Xiao Kui and everyone will take a look at the reasons why the lining of the cone crusher wears too quickly, and how to reduce the lining wear during operation.
01
The liner is subjected to high stress
When the cone crusher is working, three-dimensional abrasive wear is formed between the moving cone liner, the fixed cone liner and the crushed ore, and the surface of the liner is in a complex stress state. The squeezed ore exerts huge pressure on the local surface of the liner, and the high-speed operation of the moving cone produces huge shear stress. The two act at the same time, and the main wear mode of the liner is chiseling, cutting and impact extrusion pits.
02
Poor working conditions
Due to the working nature of the cone crusher, the liner will definitely be worn. If the cone crusher is in poor working conditions, the wear of the liner will be aggravated. For example, when the cone crusher is used in mineral processing production, according to the different types of ore body rocks, the wear degree of the cone crusher liner is related to the stress and size of the ore, and also to the Pusch hardness of the ore compressive strength.
03
Ore hardness and particle size
Depending on the hardness of the crushed material of the cone crusher, the wear degree of the liner is also different. The higher the hardness of the material, the greater the impact load the liner will bear during production; when the hardness of the ore is the same, the larger the particle size of the ore entering the crushing chamber, the more serious the wear of the liner.
Quiborn engineers serve all types of mines. For example, for high-grade metal ores, the liner may have to be replaced after one week; if it is crushing ordinary limestone, the liner can be used for half a year to a year (working ten hours a day and twenty-five days a month). It can be seen that the hardness of the material has a great impact on the service life of the liner.
04
Improper feeding method
If the feeding device of the cone crusher is improperly installed, or too much material is put into the crushing chamber, it will cause uneven feeding, material blockage in the crushing chamber and other faults, causing excessive force on one side of the liner, increasing the cutting wear of the ore on the liner, and causing serious damage to the liner.
Three precautions to reduce liner wear
01
Precautions in use
During the operation of the cone crusher, it should be noted that the materials put into the equipment must meet the crushing requirements. It is strictly forbidden to enter the crushing chamber with materials that are too hard, too high in moisture, or other non-crushed materials, otherwise it will cause liner shedding, equipment shutdown and other faults. At the same time, the cone crusher must be fed evenly, the ore must be fed in the middle of the distribution plate, and the material cannot directly interact with the liner to prevent uneven wear of the liner.
02
Precautions for replacing the liner
When replacing the liner of the cone crusher, the wear of the fixed cone, adjustment ring, locking thread, counterweight and counterweight guard must be checked. If the wear is serious, a new one should be replaced, and then the liner should be installed. This can reduce the time for secondary replacement and disassembly, saving time and effort. After the liner is installed, it is necessary to check whether the center of the liner is aligned, otherwise the liner will collide during operation, resulting in serious wear of the liner.
03
Precautions when selecting materials
Currently, the liner of the cone crusher on the market is generally made of high manganese steel. With the continuous development of science and technology, the performance of wear-resistant materials is also constantly improving. Generally speaking, it is necessary to choose materials that can quickly harden the surface under the impact load to form a hard and wear-resistant surface, while still maintaining the original toughness of the inner metal. This can increase the service life of the liner.
Since the working environment of the cone crusher is relatively harsh and dusty, it is necessary to maintain it in time and lubricate it during use to prevent difficult or unbreakable materials from entering the crushing chamber, so as to save the use of the liner and avoid unnecessary losses.
