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MEI Online: General Minerals Engineering: Latest News: October 4th 2010


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:: Gekko Lab Gets Better & Bigger

Demand for testwork and analysis of customer samples continues to expand in the Gekko laboratory’s key areas of specialisation: differential density separation, fractional density analysis, comminution strategies, mineral liberation, pre-concentration flowsheets, gravity separation, flotation, intensive leaching, resin in leach and electrowinning.

A large body of work in coarse mineral separation by gravity using Gekko’s continuous gravity recovery protocol (CGR) and Andre Laplante’s GRG protocol has been undertaken in the Gekko laboratory over the past year reflecting the company’s technical expertise and knowledge in this area. Recent work carried out through the Gekko-sponsored AMIRA P420D project by AJ Parker Centre on the InLine Pressure Jig Model (CGR) is currently being integrated in Gekko’s laboratory and technical program.

In addition to the laboratory’s jaw crusher, rolls crusher, rod mill and ball mill, we have been actively utilising lab scale Polysius LABWAL HPGR and VSI units. These alternative comminution technologies are critical to optimising mineral aspect ratio and particle size liberation for gravity separation. The HPGR and VSI technologies assist with achieving higher recoveries of liberated minerals and can play a critical role in gangue rejection.

The design of Gekko’s Python Processing plant utilises a two-stage crush design using jaw crusher and VSI/HPGR, rather than the traditional three-stage crushing and grinding circuit. In general, clients are seeking flowsheet solutions that recover and separate minerals or gangue at larger particle sizes to minimise the cost and carbon footprint through reduced power input to their comminution circuits.




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