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In a cone crusher, the crushing cavity is formed by the space between two liners: the bowl liner (fixed cone liner) and the mantle (moving cone liner). It is evident that the mantle and bowl liner are the components that directly contact the material and serve as the main wear parts in the cone crusher. SHANVIM provides answers regarding the service life of the cone crusher’s mantle and bowl liner, as well as the factors influencing them.

I. Service Life of Mantle and Bowl Liner
The mantle and bowl liner are the primary components that work together in the cone crusher to crush materials. During operation, the mantle performs a gyrating motion, periodically moving closer to and farther from the concave. Material is crushed through repeated compression and impact between the mantle (moving cone) and the concave (fixed cone), with some material discharging from the open-side discharge opening. As the mantle and bowl liner are the main parts in direct contact with the material, wear is inevitable after a period of use.

Typically, the mantle and bowl liner of a cone crusher can last up to 6 months. However, some users report needing replacement after only 2-3 months. Since their lifespan is affected by various factors, varying degrees of wear may occur. Replacement is necessary when the thickness of the mantle or bowl liner wears down to two-thirds, cracks appear, or the discharge opening becomes too large to adjust.

II. Factors Affecting the Lifespan of Mantle and Bowl Liner
Generally, factors affecting the crushing efficiency and service life of the mantle and bowl liner include: the content of stone powder and moisture in the material, the hardness and particle size of the material, the feeding method, and the quality of the mantle and bowl liner themselves.

1.Stone Powder Content and Material Moisture
When the cone crusher operates with materials high in stone powder content and moisture, the material tends to adhere to the mantle and bowl liner. Over time, this not only reduces production efficiency but also corrodes the mantle and bowl liner, shortening their service life.

For materials with high stone powder content, screening before crushing can minimize excessive fine powder.

For materials with high moisture content, measures such as natural drying or mechanical dehumidification should be taken to reduce moisture before crushing.

2.Material Hardness and Particle Size
The wear on the mantle and bowl liner varies depending on the hardness of the material being crushed. The harder the material, the more difficult it is to crush, and the greater the impact load on the mantle and bowl liner during operation, leading to a shorter service life. For materials of the same hardness, larger particle sizes entering the crushing cavity accelerate liner wear and reduce service life.

3.Feeding Method
The feeding method also influences the service life of the mantle and bowl liner. Improper installation of the feeding device or overloading the crushing cavity can result in uneven feeding or material blockage. This causes uneven force distribution on the mantle and bowl liner, intensifying wear and reducing their lifespan.

4.Quality of the Mantle and Bowl Liner
While external factors play a role, the intrinsic quality of the mantle and bowl liner is the most critical factor. High-quality wear-resistant parts require strict standards in casting. The castings must be free from cracks and defects such as slag inclusions, sand inclusions, cold shuts, porosity, shrinkage cavities, shrinkage porosity, and insufficient filling, which could affect performance.
Currently, cone crusher mantles and bowl liners on the market are typically made of high-manganese steel. With continuous advancements in technology, the performance of wear-resistant materials is constantly improving. In general, selecting materials that can rapidly harden under impact loads to form a hard and wear-resistant surface while retaining the original toughness of the inner metal can significantly extend the service life of the mantle and bowl liner.

III. Replacement of Mantle and Bowl Liner in Cone Crushers
When replacing the mantle and bowl liner of a cone crusher, it is essential to inspect the wear of the bowl liner, adjustment ring, locking threads, counterweight, and counterweight guard plate. If wear is severe, replace them with new parts before installing the liners. This approach reduces the time required for secondary replacements, saving both time and effort. After installation, ensure the liners are properly centered to prevent collisions during operation, which could cause severe wear.

Bowl Liner Replacement
The bowl liner can be replaced on-site. Unscrew the adjustment sleeve installed on the upper frame (note: rotate counterclockwise), remove the upper chamber hopper assembly, and use lifting equipment to hoist the adjustment sleeve. After removing the bolts of the adjustment sleeve support plate, the bowl liner can be taken out and replaced. During assembly, clean the outer surface thoroughly, apply grease to the threads of the adjustment sleeve, and reassemble in reverse order.

Note:
The bowl liner is secured to the adjustment ring with U-bolts, and the space between them is filled with zinc alloy to ensure a tight bond. For newly installed or replaced bowl liners, check their tightness after 6-8 hours of operation and retighten the U-bolts if necessary.

Mantle Replacement
The mantle can also be replaced on-site. Hoist out the main shaft assembly and place it on a sturdy support platform, taking care not to damage the moving cone body or spherical surface. Simultaneously, block all oil holes with cloth to prevent dust and impurities from entering. Remove the distribution plate, lock nut, lock washer, and fusible gasket in sequence. Weld two lifting lugs onto the old liner at 180° apart, then hoist out the mantle. For installing the new liner, similarly weld two lifting lugs at 180° apart, and reassemble in the reverse order of disassembly. Finally, cut off the lifting lugs.

Note:
The mantle is fixed to the cone body with a conical head, and the space between them is filled with zinc alloy. For newly installed or replaced mantles, check their tightness after 6-8 hours of operation. If loosening is detected, tighten it immediately.

Conclusion
The mantle and bowl liner are critical components of the cone crusher. During operation, ensure that the material fed into the crusher meets the crushing requirements. Avoid feeding materials that are overly hard, excessively moist, or non-crushable, as this may cause the mantle and bowl liner to detach or lead to equipment failure. Additionally, ensure uniform feeding, with material directed to the center of the distribution plate. Avoid direct impact of material on the mantle and bowl liner to prevent uneven wear. For any further questions, feel free to leave a message.

SHANVIM as a global supplier of crusher wearing parts, we manufacture cone crusher wearing parts for different brands of crushers. We have more than 20 years of history in the field of CRUSHER WEAR PARTS. Since 2010, we have exported to America, Europe, Africa and other countries in the world.