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MEI Online: Plant Operation News: Africa: September 5th 2005


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:: Diamond Recovery Plant for HC Van Wyk Diamonds

Bateman has supplied a diamond-recovery plant to HC Van Wyk Diamonds, the 2005 winner of the prestigious Golden Arrow Award as the highest-rated small mining company in South Africa's Northern Cape Province. This plant will incorporate the largest dense-media separation (DMS) plant supplied to date to a small diamond-mining company in South Africa.

The multi-million Rand contract was placed in September 2004, with the plant delivered in mid 2005. The plant processes 350 t/h of run-of-mine alluvial gravel and comprises a 200 t/h DMS and a containerised grease and X-ray recovery module. It was installed to significantly improve the recovery of diamonds at the site and replaced the existing 14 and 18 ft diamond-recovery pans.

Run-of-mine ore is scalped to discard the +150 mm fraction with the remaining -150 mm fraction being washed and screened to yield a product ranging from +1,0 to -30,0 mm, suitable for treatment by the DMS plant. The DMS concentrate is conveyed to the recovery plant where all the x-ray machine tailings are scavenged over hi-tech greasebelts to ensure maximum recovery of the diamonds.

The Bateman modular-plant concept is well proven and overcomes the problems encountered in the erection and commissioning of the processing facilities in remote and difficult locations. Accordingly, the plant for HC Van Wyk Diamonds was pre-erected and water tested at the manufacturer's works in Johannesburg, before being transported to the site by road over a distance of approximately 500 km. Erection of the plant on site and commissioning was completed in the first week of July 2005.

HC Van Wyk Diamonds (Pty) Ltd was established 13 years ago as a small diamond-digging family-business, 30 km north of Barkly West. It now employs some 250 employees, and mines approximately 500 000 t/month of alluvial gravel. The company was presented the Golden Arrow Award by Professional Management Review Africa, in recognition of its impact on economic growth and development in the Northern Cape through its contribution to job creation in the surrounding community, as well as its successful initiatives in social upliftment, skills development and HIV awareness.




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