Separation of Gold from Sulfide Using a Plasma Arc Fuming Process |
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Authors: | Abdenouri N Flamant G Badie J M Berjoan R Belghit R A |
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Institution: | (1) Faculté des Sciences et Techniques Gueliz, L.M.F.E., Marrakech, 4000 Maroc;(2) Institut de Science et de Génie des Matériaux et Procédés, B.P.5, Odeillo, 66125 Font-Romeu Cedex, France |
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Abstract: | Transferred-arc plasma treatment of iron sulfides containing gold is examined from both thermodynamic and experimental points of view. Three cases are analyzed: argon plasma with sulfide, argon plasma with a carbon–sulfide mixture, and argon–methane plasma with sulfide. The carboreduction of the materials appears to be well adapted for gold separation by fuming, but experimentally the process is limited by the poor mixing of graphite with molten material. The reduction with a CH4
(10%) plasma is a proved alternative to the aforementioned process. A gold extraction efficiency of 90% is achieved for batch smelting operations. |
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Keywords: | Gold extraction plasma fuming analytical/experimental |
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