GOLD: Dundee process boasts high recovery, no cyanide or mercury

MONTREAL – Dundee Sustainable Technologies (DST) has successfully pilot tested its environmentally friendly gold process, achieving a high recovery rate without the use of cyanide or mercury.

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MONTREAL – Dundee Sustainable Technologies (DST) has successfully pilot tested its environmentally friendly gold process, achieving a high recovery rate without the use of cyanide or mercury.

Dundee's lab in Thetford Mines, QC, tested two concentrate samples from a privately owned gold mining company. After a two-hour contact time in the unique chlorination process, 96.1% of the gold was recovered in the reactor, despite the presence of substantial base metals in the concentrate. The gold was recovered on silica with an efficiency of 99%, according to DST. The loaded silica was then smelted to produce gold bullion.

DST is assembling a demonstration plant for the process. When it become operational in mid-January 2015, the company may take up to 15 tonnes of gold concentrate per day from the mine operator over a 12-month period, provided the concentrate contains a minimum of 342.8 g/t Au (10 oz). Up to 4,500 tonnes of concentrate may be processed. DST and the mine owner will split the net profits between them.

If the demonstration plant is successful, the two parties can discuss the feasibility of building a DST process plant at the mine.

Visit DundeeTechnologies.com to learn more about the cyanide and mercury free gold recovery.

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