Why Do Ceramic Liner Edges Chip Before the Surface Wears Out?

A ceramic liner can reach a maintenance shutdown with much of its working face still intact. Yet the corners are chipped, pieces are missing along the joints, and the damaged area needs repair.

For a mining transfer chute or a coal handling hopper, this is a useful clue. Before specifying thicker ceramic or changing the grade, check how the damage starts and where the material strikes.

Follow the Damage Back to the Impact Point

Start with close-up photographs of the chipped edges and a wider view showing the feed direction. Mark whether the damage follows the incoming side of the tiles, a change in the chute wall, or the boundary of a previous repair.

Repeated contact at an exposed edge can initiate local cracks and break away small fragments while most of the ceramic face remains usable. Check for raised tiles, narrow cut pieces, and abrupt transitions. These details should be reviewed against the actual material path, including changes caused by buildup or variable feed.

A damage photograph helps locate the problem; it does not establish the root cause by itself.

Review the Support Beneath the Ceramic

For bonded tiles, the review should include contact beneath the damaged area and the condition of the attachment. For a mechanically mounted panel, check how the backing plate sits against the equipment and whether the panel can move. Follow the approved installation procedure when investigating or correcting either arrangement.

With rubber ceramic liners, the ceramic and rubber need to be assessed together. A 2021 study of ceramic-rubber impact protection found that tile dimensions and rubber properties affected the stresses in the ceramic. Its model also showed that adding rubber to an already adequate backing could offer little improvement when the highest stress came from the tile’s initial response to impact. [2]

That makes a universal instruction such as “use thicker rubber” difficult to justify. The proposed construction needs to suit the impact conditions, installation space, and temperature.

Consider ZTA After Reviewing the Construction

ZTA is worth considering when repeated impact fracture remains a concern. It should be compared with suitable alumina grades for the same duty.

In a 2023 laboratory study, ceramic samples underwent edge impact-abrasion tests with corundum particles or steel balls. ZTA25 performed best with corundum, while the tested 95% and 96% alumina grades performed similarly to ZTA25 under the steel-ball condition. [1]

The ranking changed with the test condition. These results support reviewing representative impact-abrasion performance; they do not establish a service-life multiplier for a finished liner panel.

Give the Supplier Evidence for the Next Selection

A useful review starts with the damaged panel, its location, and the operating conditions. Alongside the drawing and required quantity, provide:

• Damage photographs: close-up and overview photographs showing damage and flow direction.
• Material information: handled material, normal particle size, and maximum lump size.
• Impact and loading conditions: drop height, throughput, and any recent operating changes.
• Operating environment: temperature, wet or dry conditions, and the existing liner construction.
• Service records: time in service or cumulative tonnage, where recorded.

This gives the supplier a basis for deciding whether the next step is a different ceramic grade, a revised panel construction, or a change to the local lining detail.

ELACERA provides alumina and ZTA ceramic liner options, including rubber ceramic composite panels. Send the drawing and photographs of the damaged area so we can review the proposed lining against the duty before confirming the replacement specification.

https://www.ybnceramic.com/sale-55483328-rubber-ceramic-liners-for-mining-transfer-chutes-elacera.html

Technical References

[1] Varga et al. Impact-abrasive wear resistance of high alumina ceramics and ZTA. Wear, 522, 204700, 2023.

[2] Herr et al. Ceramic-rubber hybrid materials – A way to sustain abrasive heavy impact applications. 13th European LS-DYNA Conference, 2021.