Case Study: K-Floshield Polished High Chrome Liner

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CHALLENGE:

  • Resolve regular blockage issues.
  • Reduce on-site hang-up.
  • Minimise production downtime.
  • Extend the wear life of liner.

Recycling of building waste is a growing sector in the Melbourne metropolitan civil construction materials handling and processing industry. For approximately 8 hours per day, 6 days a week, our customer operates a large recycling facility in the city’s south east, accepting brick, concrete, asphalt, glass and other mixed waste, turning it into road base, aggregate and sand products.

One of the final processes, aggregate is combined and blended within the plant using a pugmill to produce its quality sellable products. This process mostly involves the additive of water amongst others to an already abrasive bulk material mix, resulting in a sticky solution which the site was observing in the form of hang up on the pugmill walls, floor and other surrounding chutes. Our customer reported that, due to some blockages, operators would be hosing out the pugmill multiple times a shift and in some instances, would have to isolate the plant and manually remove the hardened material.

SOLUTION:

Initially, to reduce the hang-up, the site attempted using a UHMWPE polymer sheet (recommended to assist with hang-up issues, where finer material is present, yet impact is minimal). Although somewhat successful with reducing the hang-up, our customer advised that the impact within the operating environment seemed too aggressive and the UHMWPE liner wore away prematurely after only 3 months of service. Due to the awkward and confined space of the pugmill, frequently replacing liners took a lengthy amount of time contributing to the site’s downtime and was raised as a manual handling concern.

After speaking with Kinder Australia about the issue, it was recommended they proceed with an installation of the K-Floshield Polished High Chrome Liner, utilised in heavy duty applications. The K-Floshield Polished High Chrome Liner’s purpose is to combat both extreme abrasion and hang-up via its integration of a pre-polished chromium carbide overlay on a mild steel backing. By polishing the K-Floshield Polished High Chrome Liner, a reduction in friction coefficient is achieved, aiding to the slipperiness of the wear liner.

RESULTS:

  • Hang-up issues resolved immediately.
  • Productivity efficiencies realised
  • Reduction in cleaning time.
  • Product expectations exceeded.

Our Customer reported installation was straightforward, as they were able to use traditional cutting and welding methods.

The results in hang-up reduction were immediate.  At the end of each shift the pugmill still needs to be hosed out, however the time required to complete this task has been greatly minimised.  It is expected that the longer the K-Floshield Polished High Chrome Liner is in service, the material will continue to polish, enhancing the application and further reduce the cleaning time.

After 3 months and 123,609 tonnes of 20mm minus crushed concrete, brick and cement treated concrete later, the performance was checked again to see how the material was wearing and the customer happily reported that the ‘any wear was almost negligible’ and the ‘initial weld line was still present in the wear liner’.