Published: June 9, 2016 |

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Dundee Sustainable Technologies Inc. (DST) has received, from Environment Canada, through the Canadian Environmental Technology Verification Program (ETV), an independent certification of the performances of its cyanide-free gold extraction process (the DST Gold Process).

The certification confirms that the DST Gold Process successfully extracted an average of 81 percent, with a maximum of 90 percent, of the gold content from a refractory gold bearing pyrite concentrate, while the cyanide extraction process achieved an average of 71 percent on the same material. This material is from a jurisdiction which has restricted the use of cyanide within its territory. This refractory concentrate was chosen due to the difficulty of extracting its gold using conventional processes, hence demonstrating the effectiveness of the DST Gold Process.

Throughout the ETV program, a total of 170 tonnes of gold bearing refractory pyrite concentrate were processed. The performance test sampling was conducted at DST’s demonstration plant according to the test protocol developed by STS Canada Inc. and under its supervision.

All solid residues met environmental norms and DST’s chlorination circuit delivered the anticipated gold recoveries which were higher on average than cyanide yields on same samples. In addition, the process successfully demonstrated its closed circuit operation with the recycling and regeneration of the reagents.

“We consider this an important endorsement of the DST Gold Process; demonstrating its potential as an interesting alternative to cyanide,” said John W. Mercer, president and CEO of Dundee Sustainable Technologies.

DST is currently working on projects for the commercialization of its technologies in Canada, Argentina, Bulgaria, Chile, Ireland, Namibia and Peru.

About Dundee Sustainable Technologies
The corporation is engaged in the development of environment-friendly technologies for the treatment of materials in the mining industry. Through the development of patented, proprietary processes, DST extracts precious and base metals from ores, concentrates and tailings, while stabilizing contaminants such as arsenic, which could not otherwise be extracted or stabilized with conventional processes because of metallurgical issues or environmental considerations.

To stop by Dundee Sustainable Technologies’ website, CLICK HERE

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