Recent advances in refractory gold processing

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Mots clés : Gold processing;Biochemical oxidation;Hydrochemical oxidation;Hydrometallurgical technology;Pressure oxidation;Refractory ores
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Publication: CIM Bulletin
Auteur(s): Michel David, Eric Toh
Mots clés: Geostatistics, Grade control, Ore sampling, Dilution, Blasthole sampling
Numéro: 931
Volume: 82
Année: 1989
Texte
Publication: CIM Bulletin
Numéro: 931
Volume: 82
Année: 1989
Texte
Sommaire: Cluff Mining has successfully operated a gold recovery plant at its Cluff Lake operation in northern Saskatchewan to recover gold from Phase 1 uranium leach tailings. The operating circuit consists of tailings repulping, grinding, cyanidation, carbon-in-pulp, gold recovery, and cyanide destruction by acidification, volatilization and re-neutralization. The process is described and operating data and metallurgical results from the operation are provided.
Publication: CIM Bulletin
Auteur(s): L.A. Melis
Mots clés: Mineral processing, Gold recovery, Gold refining, Cluff Lake operation, Uranium leach tailings, Metallurgy, Cyanide recovery.
Numéro: 931
Volume: 82
Année: 1989
Texte
Sommaire: Unassayable gold and platinum group metals have come into vogue in the 70s and 80s in certain jurisdictions as a means of perpetrating fraud. Usual arguments are that a particular ore is not amenable to "conventional fire assaying". Explanations for unassayable gold usually revolve around: evaporation of micron-size gold; vaporization of organic gold complexes; volatization of gold halides; alloying of gold with PGM's which prevents fusion or alloying which prevents collection.
This...
Publication: CIM Bulletin
Auteur(s): W.G. Bacon, G.W. Hawthorn, G.W. Poling
Mots clés: Mineral processing, Gold analyses, Assays
Numéro: 931
Volume: 82
Année: 1989
Texte
Sommaire: Mineralogical investigations in connection with gold metallurgy are usually performed to find the reason for poor recoveries by cyanidation or by other leaching techniques. Poor recoveries most commonly are obtained when (1) native gold is encapsulated in an insoluble mineral as "invisible gold"; (2) native gold is coated with a precipitate; (3) gold-bearing products are insoluble in cyanide solutions; (4) carbonaceous material in the ore adsorbs gold; and (5) associated minerals...
Publication: CIM Bulletin
Auteur(s): William Petruk
Mots clés: Gold, Refractory gold, "Invisible gold", Alloys, Mineralogy, Recovery
Numéro: 931
Volume: 82
Année: 1989
Texte
Sommaire: Recent engineering advances in open pit rock mechanics have resulted in improved pit wall slope design and improved operating procedures in the event of a major wall instability. At the other end of the spectrum, on the scale of single bench failures, considerable discretion is left to the mine operators as to how potential problems are handled. The usual alternatives are either to operate with caution beneath potential hazards, or try to bring the unstable rock down. In specific cases it may...
Publication: CIM Bulletin
Auteur(s): R.A. Walker, G. Blackwell, T. Javorsky, G. Scheltgen
Mots clés: Rock Mechanics, Open pit mining, Slope monitoring, Computer applications, Wall stability, Brenda Mines
Numéro: 931
Volume: 82
Année: 1989
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