Cross-border shopping in mining?

Abstract 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 competitive.
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Publication: CIM Bulletin
Author(s): Klaus Gockmann
Issue: 958
Volume: 85
Year: 1992
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Summary: 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
Author(s): C.R. Edwards
Keywords: Mineral processing, Uranium extraction, Leaching, Beneficiation, Bioleaching, Waste disposal.
Issue: 958
Volume: 85
Year: 1992
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Summary: 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
Author(s): T. Cienski, D. Doyle
Keywords: Industrial minerals, Comminution of industrial minerals, Energy consumption, Cement grinding circuits, Grinding circuit control, Grinding aids, Energy conservation.
Issue: 958
Volume: 85
Year: 1992
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Summary: 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
Author(s): James A. Decks
Keywords: Computer applications, Electronic protection systems, Protection systems.
Issue: 958
Volume: 85
Year: 1992
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Summary: 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
Author(s): H. Bannach
Issue: 958
Volume: 85
Year: 1992
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Summary: It is becoming increasingly probable that emissions of carbon dioxide from the fossil fuels will have to be reduced to deal with the threat of global warming. This issue is likely to be resolved one way or the other in the period 1995 to 2000 which does not leave much time to develop responsive options. In the intervening period, the policy of the Government of Canada is to stabilize emissions of greenhouse gases at their 1990 level by 2000, by encouraging greater efficiency in the use of...
Publication: CIM Bulletin
Author(s): John H. Walsh
Keywords: Metallurgy, Carbon, Iron, Liquid fuels, Fossil fuels, Global warming, Carbon dioxide emissions.
Issue: 958
Volume: 85
Year: 1992
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