From ore to ferroalloy at Niobec Mine: The role of the geologist in ISO 9002 implementation

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Mots clés : Geology;Exploration;ISO 9002
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Texte
Sommaire: Hot forming and superplasticity in powder metallurgy aluminum alloys and composites is reviewed. The effects of alloy composition, particulate composition, size, and size distribution is summarized. The role of climb distance for recovery is described in connection with the size of strengthening phases. In materials with fine strengthening phases on the order of one micron or less, high strain rate superplastic deformation processes are likely. However, the quality of superplastic deformation...
Publication: CIM Bulletin
Auteur(s): T.R. Bieler
Mots clés: Metallurgy, Aluminum alloys, Powder metallurgy, Metal matrix composites, Hot working, Superplasticity, Post-forming properties.
Numéro: 1007
Volume: 90
Année: 1997
Texte
Sommaire: The selection of the production rate is one of the most crucial decisions to be made in the development of a mineral property. However, it is not uncommon for the production rate to be decided arbitrarily, before any technical evaluations begin, and it is often not reconsidered when better data becomes available. A number of methods are used in the mineral industry to select the production rate for a project. There is general agreement that the size of the ore reserve has a strong influence...
Publication: CIM Bulletin
Auteur(s): Lawrence Devon Smith
Mots clés: Mineral economics, Production rates, Optimum production rates.
Numéro: 1007
Volume: 90
Année: 1997
Texte
Sommaire: The effect of extended ball milling has been studied for two industrial processes: (1) the processing of metal sulphide concentrates; and (2) the carbothermic reduction of ilmenite to synthetic rutile. The plant concentrates were a gold ore with 128 g/t Au of which 8% was non-refractory and a zinc concentrate with copper impurities.
The gold concentrate showed complete dissolution of the gold bearing minerals after milling giving almost complete gold liberation. The zinc concentrate showed...
Publication: CIM Bulletin
Auteur(s): Nicholas J. Welham
Mots clés: Mineral processsing, Extended ball milling, Milling.
Numéro: 1007
Volume: 90
Année: 1997
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