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MEI Online: Plant Operation News: Africa: October 15th 2018


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:: Multotec Samplers Give Real-Time Results at Gamsberg


Vedanta’s $400 million Gamsberg Zinc project near Aggeneys in the Northern Cape will use process control and metallurgical accounting slurry samplers supplied by global specialists Multotec Process Equipment. The project is currently being constructed by ELB Engineering Services.

According to Modisaotsile Nyokong, Multotec Process Equipment’s process engineer, the process control samplers will provide a continuous sample to the online population stability index (PSI) and X-ray fluorescence (XRF) analysers. This will enable real-time results to be generated for management and operators at Gamsberg.

“Our unique single-stage vezin sampler and double-stage ‘Two In One’ metallurgical accounting samplers were supplied for streams ranging from 80 NB to 700 NB inlet, to collect representative final composite sample sizes of less than 20 litres per shift,” says Nyokong.

The Gamsberg mine plans to produce 4 million tonnes of concentrator feed a year from the open-pit mine and an annual 250,000 Mt of zinc in concentrate.

The process control samplers supplied include gravity (shark fin type) and pressurised (pressure pipe) samplers, with each sampler custom-designed to suit the flow requirements of each analyser. PSI analysers require 100 litres per minute, while XRF analysers need 100 to 300 litres per minute.

Nyokong stresses the importance of best practice metallurgical accounting designs ensuring Theory of Sampling and AMIRA standards are applied and considered when proposing and implementing sampling solutions for customers.




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