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Barrick Gold Corporation is the largest gold mining company in the world, with its headquarters in Toronto, Ontario, Canada. Barrick is currently undertaking mining projects in Argentina, Australia, Canada, Chile, the Dominican Republic, Papua New Guinea, Peru, Saudi Arabia, the United States and Zambia. For 2013, it produced 7.2 million ounces of gold at all-in sustaining costs of US $915/ounce and 539 million pounds of copper at C1 cash costs of $1.92/pound. As of December 31, 2013, its proven and probable mineral reserves were 104.1 million ounces of gold, 888 million ounces of silver contained within gold reserves, and 14.0 billion pounds of copper.On January 20, 2006, Barrick acquired a majority share of Placer Dome. The production of the combined organization moved Barrick to its current position as the largest gold producer, ahead of Newmont Mining Corporation. Wikipedia.

Yalcin E.,Barrick Gold Corporation | Kelebek S.,Queens University
International Journal of Mineral Processing | Year: 2011

Kinetics of semi-batch flotation behavior of a gold ore from North-Western Quebec, Canada was investigated with respect to fineness of grind (P 80). The gold was mostly associated with pyrite in native form as inclusions and was also in contact with pyrite along the boundaries of non-sulphide gangue. Gold recoveries were found to increase from 91.8% to 95.8% as the particles size decreased from an F80 of 205 μm to 53 μm. Data treatment according to the graphical method of kinetic analysis indicated a much better fit to second order kinetics for both gold and pyrite with correlation coefficients higher than 0.998 compared to first order kinetics with correlation coefficients of less than 0.95. Variation and implication of flotation rate constants are discussed with respect to chemical conditions and particle size. © 2010 Elsevier B.V.

Barrick Gold Corporation | Date: 2012-06-15

The present disclosure is directed to a process for recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin using an eluant comprising trithionate. The barren resin is contacted with a sulfide, bisulfide, and/or polysulfide to convert sorbed trithionate to thiosulfate. The desorbed thiosulfate is contacted with an oxidant and converted to trithionate for eluant recycle.

Barrick Gold Corporation | Date: 2013-12-11

The present invention is directed to a precious metal recovery process in which an acid sulfidic feed material is subjected to acid pressure oxidation and an alkaline sulfidic feed material is subjected to alkaline pressure oxidation, with the discharge slurries from the pressure oxidation processes being combined to reduce neutralization requirements prior to precious metal recovery.

Barrick Gold Corporation | Date: 2011-12-07

A method and system are provided in which a gold and/or silver-collecting resin-in-leach circuit comprises both co-current and counter-current sections.

Barrick Gold Corporation | Date: 2014-05-27

The disclosure relates to pre-treatment of precious metal-bearing oxide ores, prior to precious metal leaching by thiosulfate. The process comprises mixing oxide ore in oxygenated water in the presence of a carbon-based material (e.g., activated carbon or other type of carbon). The carbon-based material can be separated from the ore slurry, and, the gold is thereafter leached by a thiosulfate lixiviant.

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