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WEIR MINERALS SAVES OCEANAGOLD $800,000 PER ANNUM WITH CAVEX® HYDROCYCLONES AT DIDIPIO PROJECT GOLD AND COPPER MINE

Tuesday, January 21st, 2020

Replacement of competitor cyclones with Cavex® 400CVX10 cluster reduced grinding mill recirculation by 246%.

The installation of 19 Cavex® 400CVX10 hydrocyclones at OceanaGold’s Didipio Project gold and copper mine in the Philippines has led to savings of more than US$800,000 annually through a dramatic reduction in grinding circuit re-circulation.

The Didipio mine, which employs more than 1,500 workers (drawn predominantly from the local community) expanded its production capacity, which increased the incumbent cyclones’ feed density beyond what they could effectively manage, leading to a circulating load of up to 700%.

The Cavex® 400CVX10 hydrocyclones significantly improved separation efficiency due to their finely tuned spigot liner diameter, and the strength and corrosion resistance provided by its cast housing.

WMD1005 Cavex Oceana Gold Didipio External Case Study Final2

Thanks to these qualities, the introduction of the Cavex® hydrocyclones reduced the circulating load from 620% to 374%. The direct savings in power consumption, ball consumption, “Having had good performance from Cavex hydrocyclones at our New Zealand sites, we were confident that retrofitting Cavex hydrocyclone cluster at Didipio, with an increased number of smaller cyclones than we had at the time, would help reduce our problematic circulating load and lever multiple benefits in doing so,” says Gary Webb, Processing Manager, OceanaGold Didipio Project.   “The changeover to Cavex hydrocyclones has exceeded our expectations, enabling higher throughput and lower consumable costs without being penalized in grind size.”

WMD1005 Cavex Oceana Gold Didipio External Case Study Final6WMD1005 Cavex Oceana Gold Didipio External Case Study Final3

The superior performance of Cavex® hydrocyclones can be attributed to the unique 360° laminar spiral inlet geometry design, which provides a natural flow path into the hydrocyclone. This shape allows the feed to blend smoothly with rotating slurry inside the chamber, reducing turbulence.

WMD1005 Cavex Oceana Gold Didipio External Case Study Final5

“Working with customers across the globe, our expert engineers are constantly looking at how they can maximise separation efficiency, hydraulic capacity and extend the wear life of not just the hydrocyclone, but our customers’ overall processing plants,” says Mike Arakawa, Philippines Country Manager, Weir Minerals. “I’m proud of the results we’ve achieved together with OceanaGold. Reduced circulation means reduced power draw, fewer balls consumed and less equipment wear, creating a more sustainable mine.”

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