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Nichromet Extraction Gold Technology

Nichromet Extraction Gold Technology. Nichromet Cyanide -Free Gold Extraction Technology. A green alternative to the classical cyanide approach Give access to ores refractory to cyanidation Less costly than the classical processes without environmental mortgage on residues

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Nichromet Extraction Gold Technology

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  1. Nichromet Extraction Gold Technology

  2. NichrometCyanide-Free Gold Extraction Technology • A green alternative to • the classical cyanide approach • Give access to ores • refractory to cyanidation • Less costly than the • classical processes without • environmental mortgage on residues • Can be implemented as modular plant Nichromet Extraction Inc. 3700, Lac Noir Street Thetford Mines (Qc) 418-423-7247 www.nichromet.com

  3. Vision Develop an economic alternative to classical cyanide process for gold extraction, while keeping a sustainable development approach minimizing the impact on the environment.

  4. Overview of the Process Controlled Oxidation Sulphides Ores Sulfuric Acid Acid Leaching Base Metals Halogens Treatment Precious Metals Inert Tailings

  5. Nichromet Process Flowsheet

  6. Advantages Over Cyanide • Faster Reaction Time • Process time of few hours instead of few days • Legal issues • Cyanidation has been banned in many countries and some States in USA (ex:Wisconsin) • Extraction of silver and PGM if present

  7. Environmental Advantages • No cyanide • No tailings pond (elimination of spillage hazard) • No liquid effluent • Solids residues devoided of sulphides and base metals • No acidic lixiviate or contaminants from tailings site

  8. Characteristics of the NichrometTechnology • Flexible • Can handle base metals (bulkflotation : higherefficiency) • Can treat carbonaceous ore • Can handle telluride contamination • Fast • Leaching time of 2 hoursinstead of 2 days for cyanide • Green • Cyanide-free process • Sulfideisrecycled as sulfuricacid • No waste water, no tailing pond and no air pollutants • Solid wastes : inert and stable, evenwhenusing high arsenic ores • Profitable • Processcost ($/oz gold) similar to cyanide • Capital costlower (10-15%) thancyanide

  9. Successfully piloted at the ton scale on a wide range of materials *Flotation concentrates requiring pre-treatment by oxidation

  10. Environmental Recognition Grant of 700 k$ from Green Technologies Demonstration Program of Quebec Government in 2011-2012 Grant of 5 M$ from Sustainable Technology Development Fund of Federal Governement in 2013

  11. Somine Haïti Project vs Nichromet Technology • Current gold estimated resources (3,2 MT) • Gold : 339 000 oz Au @ 3,27 g Au/T • Copper : 28 Mlbs @ 0,4 %Cu • Exploitation permit in force • Mining plan • Near surface resources (open pit potential, low operating cost) • 20 M$ investment done in exploration to date

  12. Great Potential for a Nichromet plant in Haïti • Phase I • Bring the top layer of the deposit into production with a modular plant to process oxides concentrate • 15 M$ investment for the modular plant only • Potential of 25 000 oz Au/year • Phase II • 1000 TPD Mine and full scale processing plant • Gold production rate of 35 000 oz Au/yr • Investment for Nichromet processing plant of 35 M$ • Nichromet is currently conducting a demonstration program for the application of its technology on the Faille B deposit.

  13. Toward a Greener Gold Industry

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