MechChem Africa

Stilfontein-based sand and aggregate supplier CNC Crushers raised throughput at its Roadstone Shaft 5 crushing plant by 45% while cutting back on maintenance and simultaneously increasing production, after implementing a full process-focused solution from Weir Minerals Africa.

process focused solution ups crusher plant outputAccording to JD Singleton, Weir Minerals general manager for TrioTM and Enduron® equipment, CNC Crushers of Stilfontein was experiencing high wear on the installed conventional cyclone, as well as on the older technology pump, having to replace liners every 120 hours of operation.

“Our brief was to increase solids to the cyclone underflow and increase the wear life on the cyclone feed pump,” says Singleton. “The continuous breakdowns experienced with the older-technology crushing equipment, and the excessive oil usage was also causing high downtime for the plant. CNC Crushers needed a solution that would utilise the existing footprint and infrastructure.”

As a solution, Weir Minerals Africa in- stalled a new technology, Warman® WBH® 100 slurry pump and a Cavex® 400CVX10 hydrocyclone; while it also replaced the existing cone crushers with TrioTM TC51S and TC36SH cone crushers to increase uptime and reduce maintenance costs.

“After 1 900 operating hours, the slurry pump was still running without needing any replacement parts, a vast improvement on the previous mean time between liner replacements of 120 hours,” he says.

Warman WBH pumps are the world’s new standard for heavy duties. A wide variety of impellers and shaft seals provide an excellent fit for a wide range of applications. The WBH pump is designed to provide excellent wear life while maintaining efficiency through ‘one point adjustment’ during the wear cycle for the best total operating cost.

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