Geerite-type structures and the flotation of sphalerite

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Mots clés : Mineral Processing;Flotat ion;Geerite;Sphalerite;Leaching;Sulphu r
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Publication: CIM Bulletin
Auteur(s): J.G. KELLY
Mots clés: Underground mining, Mucking, Crushing, Conveying, Scooptrams, Oscilloaders, Equipment.
Numéro: 911
Volume: 81
Année: 1988
Texte
Sommaire: The tax reform process marches on. The December 16, 1987 measures tabled by Finance Minister Michael Wilson represent one more step toward the objective of total reform of Canada's income and sales taxes. While the income tax changes are taking shape, much work still needs to be done on the sales tax side of the coin.
Publication: CIM Bulletin
Auteur(s): ROBERT B. PARSONS
Numéro: 911
Volume: 81
Année: 1988
Texte
Sommaire: A flexible model involving perfect mixers, stagnant zones, plug flow, material bypassing and recycling zones has been developed for interpreting mixing phenomena in mineral processes. The mixing properties are described by the residence time distributions which can be subsequently interpreted by the flexible model. User-friendly computer programs (for IMB-PC or compatible) have been developed for simulation and modelling of RTDs using the proposed model. Seven mineral processing case studies...
Publication: CIM Bulletin
Auteur(s): C. BAZIN, D. HODOUIN
Mots clés: Mineral processing, Modelling, Computer programming, Computer application, Mixers, Residence time distribution, Homogenization.
Numéro: 911
Volume: 81
Année: 1988
Texte
Sommaire: Oil has been discovered off Newfoundland in a number of locations on the Grand Banks, the most notable and exciting being in 1979 when Hibernia was discovered. This discovery has brought new challenges to the province as well as to all of Canada. During the seven years* since its discovery, both industry and governments have attempted to define its parameters and to find the most efficient and economical way to develop the field. A number of studies have been completed during the interval and...
Publication: CIM Bulletin
Auteur(s): R. FLOOD
Mots clés: Industrial minerals, Concrete, Platform construction, Hibernia, Oil fields, Drilling equipment, Gravity-based platform, Mineral resources.
Numéro: 911
Volume: 81
Année: 1988
Texte
Sommaire: At the time of this study, the Valley mine was producing 23 000 tonnes of ore per day from a large, low-grade porphyry copper orebody. Sulphide mineralization, principally bornite and chalcopyrite, occurs in a stockwork of quartz veins in one phase of the Guichon Creek batholith. The property was explored from 1967 to 1982, and was placed in production in 1983.
Using a three-parameter lognormal approximation developed by G.F. Raymond at Similkameen and Mount Isa Mines, a geostatistical...
Publication: CIM Bulletin
Auteur(s): G.F. RAYMOND, W.P. ARMSTRONG
Mots clés: Ore reserve estimation, Valley, Copper, Highland Valley, Grade estimates, Kriging, Geostatistics.
Numéro: 911
Volume: 81
Année: 1988
Texte
Sommaire: Canada became the world's largest uranium producer in 1984. That leadership position is likely to be maintained for many years into the future because of a firm production base, many undeveloped known deposits with commercial promise, and a large geological potential for new discoveries.
There are some uncertainties on the horizon, principally because of restrictive actions in process within the U.S.A., which are aimed at preserving a deteriorating domestic uranium industry. Should such...
Publication: CIM Bulletin
Auteur(s): O.J.C. RUNNALLS
Mots clés: Uranium, Mineral economics, Energy resources, Nuclear energy, Uranium production.
Numéro: 911
Volume: 81
Année: 1988
Texte
Sommaire: The circulation wear rates of pure nickel, cupronickel and nickel-plated-steel coins were measured and found to be in the ratio 1:3:1. The relative wear rates of nickel and cupronickel coins were similar to those reported in earlier studies, and the circulation wear data for nickel were used as a reference in laboratory wear tests. A correlation between circulation wear rates and laboratory wear rates formed the basis for a prediction of service life using relief legibility as an 'end of...
Publication: CIM Bulletin
Auteur(s): M.J.H. RUSCOE
Mots clés: Wear testing, Coinage, Nickel-bonded steel, Aureate Nickel, Cupronickel, Hardness, Friction.
Numéro: 911
Volume: 81
Année: 1988
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