Understanding liner wear takes more than looking at operating hours or tonnage. The worn profile can help explain how the crushing chamber has changed and what deserves a closer review.
For Cadman Materials’ Lewisville Pit, CWP compared new and worn liner profiles from a Sandvik CH440 cone crusher. The study evaluated the chamber at a 5/8-inch closed-side setting, using a 3-inch feed-size reference.
The analysis indicated that the worn chamber could restrict material larger than that reference above the nip point. It also identified the middle of the mantle as its thinnest area. Although a cracked mantle had prompted the liner change, the study did not establish the cause of the crack.
Recommendations included confirming the actual feed-size distribution and comparing wear from the operating OEM liner set with the CWP set planned for a subsequent run. A medium chamber profile was also identified for further evaluation, depending on the feed gradation.
This review illustrates how a wear study can help producers evaluate liner condition, chamber selection and the information needed to make the next equipment decision.
