CHALLENGE A cluster of four 380mm De-watering Cyclones were sent in to HMA for refurbishment. They were originally lined with 12mm alumina tiles. Our client requested we propose methods to increase the service life of the items. SoL utioN The cyclones were lined with HMA Alumina/SiTech ‘Hybrid Lining’ which included the use of engineered alumina tiles in the inlet head and HMA SiTech monolithic linings in the cone sections. SiTech is a fine grain ceramic with a matrix hardness similar to the main ceramic particles, thus providing an extremely hard wearing surface. o utComE After being in service, the items were returned to us for inspection and refurbishment. Upon first inspection it was noted that one of the four cyclones had suffered a ‘blow out’ at the flange joint betwee

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