Ceramic liner is tougher than coal clinker 09 February 2011

Material protection specialist Kingfisher says it has solved a problem of rapidly wearing surfaces at an unnamed power station, where two other firms' trial installations had failed.

Kingfisher managing director John Connolly explains that the firm was called in by the power station plant engineer following the failure of both cast basalt and hi-chrome castings as lining materials for conveying hot coarse clinker to an ash reception hopper.

The problem, he explains, was that, although the clinker was suspended and conveyed hydraulically, the internal surface of the pipeline was being subjected to severe abrasion and erosion.

Kingfisher recommended its 25mm thick K-ZAS ceramic lining. It was supplied in cylinder form, to ensure internal concentricity, and subsequent operation has shown that the liners considerably outperform the earlier systems.

"We know from experience that there is no 'one size fits all' solution in wear protection systems. Each application has to be considered individually. It has to be surveyed and considered before a tailored solution can be arrived at," says Connolly.

Interestingly, K-ZAS is rated nine on the MOHS hardness scale and also has very high thermal shock resistance, making it is ideal for high abrasion and high temperature applications within the power generation, bulk solids handling and mineral processing industries.

Brian Tinham

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