Mining’s old guard needs strong medicine
A new report details subpar investor returns in the mining industry over the last decade, particularly big cap diversified companies which have not adapted to new realities.
Bonte Gold Mines, Ghana. 3.0m dia x 8.0m long washer barrel to process 350 t/h of terrace alluvial gold ore containing up to 60% clay interspersed with quartz boulders up to 600mm in size.
The gold content of approx. 0.5g/tonne was intimately associated with the clay fines.
Gold recovery was less than 70% due to lack of full clay dispersion and consequent loss of gold particles tied up in clay ball agglomerates and residual clay coatings .
This machine was replaced with a Sepro 3.0m dia x 8.0m long heavy-duty ore scrubber, which immediately increased gold recovery to over 95% and subsequently maintained this recovery at an increased feed rate of 700t/h.
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