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Texte
Sommaire: A new method for the hydrometallurgical treatment of refractory gold arsenosulphide concentrates is presented. The method involves a combination of fine grinding, intensive agitation, flotation, and cyanidation, and consists of leaching of - lOp. pyrite and arsenopyrite particles in alkaline solution under intensive agitation without the application of costly high pressure and roasting techniques. Consistent extractions of gold, in excess of 96%, are achieved.
Publication: CIM Bulletin
Auteur(s): S.N. Rossovsky
Mots clés: Leaching, Refractory gold, Arsenosuphide concentrates.
Numéro: 971
Volume: 86
Année: 1993
Texte
Sommaire: With respect to impurities, HBM&S' copper smelter, located in Flin Flon, Manitoba, is in an unusual position. In addition to the usual concerns, the fact that copper and zinc production at Flin Flon is closely integrated results in the unique situation where feed to the copper smelter typically contains 7% to 8% zinc.
This paper discusses the ramifications to copper smelter operations resulting from the marriage of HBM&S' metallurgical plants. Distributions of impurities (specificall...
Publication: CIM Bulletin
Auteur(s): A.M. Salomon de Friedberg
Mots clés: Smelters, Copper, Zinc, Operating practices, Environmental improvements.
Numéro: 971
Volume: 86
Année: 1993
Texte
Sommaire: Developments in pyrometallurgical technology have led to larger furnaces operating under more intense process conditions. In order to maintain the reliability of these furnaces, which are frequently single-line units, the design of the refractories, cooling systems and bindings has become more critical. Traditional thermal and chemical requirements for the refractory to resist slag attack must still be carefully determined. The larger, modern furnaces have placed a new emphasis on the...
Publication: CIM Bulletin
Auteur(s): R.C. Francki, K.M. Donaldson, F.E. Ham, J.G. Schofield
Mots clés: Non-ferrous pyrometallurgy, Refractories, Electric furnaces, Bindings, Hearth thermal resistance, Refractory design, Slag attack.
Numéro: 971
Volume: 86
Année: 1993
Texte
Sommaire: More copper concentrates are treated in flash smelting furnaces than by any other process, and such furnaces are located in most of the world's major copper producing areas. Except for perhaps two furnaces treating chalcocite-type materials, little difference is seen between the grades of the concentrates being smelted. Within individual smelters, even less variation in feed grades is found. This is both accidental and intended. Many furnaces treat concentrates from captive ores, and these...
Publication: CIM Bulletin
Auteur(s): J. W. Matousek
Mots clés: Flash smelting furnaces, Copper smelting, Furnaces, Grade concentrate.
Numéro: 971
Volume: 86
Année: 1993
Texte
Sommaire: The electrolytic tan/chouse at CCR was recognized by management as lagging behind modem refineries in terms of productivity, energy efficiency and controls. The operation was also burdened by high maintenance costs of cells, floors and electrolyte recircula-tion systems.
A bench marking program was started in 1986 to evaluate processes and other technology by visiting major copper refineries in North America, Europe and Japan. The basic principles necessary to optimize the operation were...
Publication: CIM Bulletin
Auteur(s): J. Thiriar, R.J. Geren, V. Baboudjian
Mots clés: Copper electrorefining, Mechanization, Controls, Cell construction.
Numéro: 971
Volume: 86
Année: 1993
Texte
Sommaire: In the Utility Nickel furnaces, the hearth and sidewalk are lined with high-Alf)3 bricks. During charging and thermal cycling (more so as the linings on these reverberatory furnaces age), pieces of brick spall or abrade from the refractory and collect on the top of the bath. These pieces are removed using a non-corrosive slag toward the end of the heat when the bath temperature is ~ 1600°C.
This benign liquid can be generated by two methods. First and most obvious, suitable ingredients...
Publication: CIM Bulletin
Auteur(s): C. Doyle, A.E.M. Warner, D. Stremlaw, S. Harshaw
Mots clés: Furnaces, Nickel furnaces, Refineries, Utility Nickel furnaces.
Numéro: 971
Volume: 86
Année: 1993
Texte
Sommaire: The CIM Careers Task Force has addressed industry's concern of a perceived shortage of skilled personnel over the coming decade. The industry is faced with a fundamental shift by young Canadians away from scientific and engineering careers, coupled with the fact that today's students know little about the minerals industry and have a poor image of it.
The responses to two questionnaires which were distributed to CIM members, government, professional associations, and educational institutions,...
Publication: CIM Bulletin
Auteur(s): Susan W. Campbell, Bruce Regensburg
Mots clés: Human resources, Minerals industry, Careers Task Force.
Numéro: 971
Volume: 86
Année: 1993
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