Reinforcement and telemetry monitoring of a wedge structure

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Mots clés : Rock mechanics;Open pit mining;Slope monitoring;Computer applications;Wall stability;Brenda Mines
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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: Recovery of gold from refractory ores and concentrates presently constitutes one of the most important, challenging, and exciting areas ofR&D activity in the gold processing industry. New technologies are being tested for the treatment of refractory gold materials, some of which have been advanced to the level of commercial operation. In this paper, some recent technological developments in the hydrometallurgical processing of pyritic matrix-refractory gold ores are highlighted. Key...
Publication: CIM Bulletin
Auteur(s): G.P. Demopoulos, V.G. Papangelakis
Mots clés: Gold processing, Biochemical oxidation, Hydrochemical oxidation, Hydrometallurgical technology, Pressure oxidation, Refractory ores
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
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