Making better use of carbon:Part I — The carbon dioxide problem and the steel industry

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Mots clés : Metallurgy;Carbon;Iron;Liquid fuels;Fossil fuels;Global warming
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Publication: CIM Bulletin
Auteur(s): Klaus Gockmann
Numéro: 958
Volume: 85
Année: 1992
Texte
Sommaire: Since the first commercial extraction of uranium in the early 1940s, the range of feasible process alternatives has greatly increased. This paper reviews process options to reduce extraction costs, improve efficiencies, effect safer operations, and lessen environmental impacts. Equipment and processes used in the past, in use now, and that could be considered for future use are described.
Publication: CIM Bulletin
Auteur(s): C.R. Edwards
Mots clés: Mineral processing, Uranium extraction, Leaching, Beneficiation, Bioleaching, Waste disposal.
Numéro: 958
Volume: 85
Année: 1992
Texte
Sommaire: This paper presents and discusses the results of a detailed study conducted on the subject of energy consumption in the comminution of industrial minerals. The study was based on pilot circuit testing, plant operating data collection, detailed equipment data and literature research. The areas covered by investigations include: high efficiency classification; air classifiers for cement grinding circuits; grinding aids in dry grinding; and dry grinding circuit control based on particle size...
Publication: CIM Bulletin
Auteur(s): T. Cienski, D. Doyle
Mots clés: Industrial minerals, Comminution of industrial minerals, Energy consumption, Cement grinding circuits, Grinding circuit control, Grinding aids, Energy conservation.
Numéro: 958
Volume: 85
Année: 1992
Texte
Sommaire: Motor failures and equipment bearing failures are responsible for reduced productivity. With the introduction of computers and data acquisition systems, users are now able to monitor, report and trend deteriorating conditions and take corrective action before a critical shutdown occurs.
This paper discusses the monitoring and trend analysis of: motors, and motor and equipment bearings.With today's digital electronics technology users are now able to monitor their equipment, detect deteriorati...
Publication: CIM Bulletin
Auteur(s): James A. Decks
Mots clés: Computer applications, Electronic protection systems, Protection systems.
Numéro: 958
Volume: 85
Année: 1992
Texte
Sommaire: It is generally acknowledged that Canadian and foreign-based mining companies are spending relatively fewer dollars in Canada and more dollars abroad than was the case not many years ago. It is common to see the Canadian tax system being fingered as one of the causes in this shift in direction. However, if one takes the time to peel away the surface of our tax system, and to probe a little deeper into its substance, it will be found that the Canadian taxation of mining is generally quite...
Publication: CIM Bulletin
Auteur(s): Robert B. Parsons
Numéro: 958
Volume: 85
Année: 1992
Texte
Sommaire: This paper focusses on what seem to be the leading indicators of prosperity in the minerals industry during this decade: the geographical distribution of deposits, environmental impact, capital allocation and acid consumption. There is a potential for meeting environmental criteria at a reasonable profit margin, but those with limited acid demand within economic range will face hard times to meet growing environmental concerns, resulting in additional mine closures. At the other end, those...
Publication: CIM Bulletin
Auteur(s): H. Bannach
Numéro: 958
Volume: 85
Année: 1992
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