Agnico Eagle LaRonde plant: Metallurgical challenges present and future

CIM Journal , Vol. 8, No. 1, 2017

C. Bolduc and J. Cayouette
AgnicoEagle Mines
Rouyn-Noranda, Québec, Canada

P. Blatter
GreenStone Gold Mines
Toronto, Ontario, Canada
Abstract The LaRonde mill was commissioned in 1988 and began treating ore from the Penna shaft in 2000. The mill has been expanded to accommodate 7,500 t/day, but ramped down to 6,000 t/day since the deep extension began. The process recovers gold, silver, and base metals. In 2008, the Goldex plant began trucking gold-pyrite concentrate to a treatment plant feeding pulp to the LaRonde mill, increasing gold output by 40,000 oz. In 2009, the high-grade Lapa ore processing facilities were annexed to the LaRonde plant, increasing gold output by 120,000 oz. This paper outlines the metallurgical considerations related to the treatment of different ore types.
Keywords: Collector, Frother, Goldex, Lapa, Thiocyanate
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