Hughes Pumps blast away the abrasives

Hughes Pumps has recently supplied a custom designed, automatic high- pressure tank cleaning system to Sandvik Hard Materials for use at their Coventry Cemented Carbide production facility.

Rigorous control is necessary throughout the Cemented Carbide manufacturing process since the quality of the final product can be greatly affected by seemingly insignificant factors. During manufacture the carbide slurry is dried by spray drying to a powder form. Afterwards the spray dryer vessel must be thoroughly cleaned to remove any remaining deposits and prevent contamination between batches of different material grades. Initially production personnel carried out this function, being lowering into the vessel to use hand held cleaning lances, which proved to be both time consuming and potentially unsafe.

The Hughes turnkey system solution comprises a high pressure pumpset, high pressure stainless steel ring main, with an automatic three dimensional cleaning head that is raised and lowered into the vessel via a high pressure hose and pneumatic hose reel. The tank cleaning head rotates in two planes by the reaction of the water jets to bring about total cleaning coverage of the complete vessel in 30-60 minutes depending on the degree of deposits present.

The cleaning process, which is now totally automated, has proved to be very cost-effective. The complete surface of the vessel is cleaned during the cycle, which has eliminated the possibility of contamination between batches, greatly improving product quality.

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