Low-Temperature Dry Chlorination of Sulphide Ores — A Review

Abstract Several low-temperature, dry chlorination processes for the treatment of sulphide minerals are reviewed, in a chronological order. These processes include the following: the Swinburne-Ashcroft, Baker-Burwell, Malm, Comstock-Wescott (Aldermac) and the Mitterburg Mining Process. Dry chlorination investigations at the Canadian Mines Branch (now CANMET) and the U.S. Bureau of Mines are discussed, as is a proposed process by the South Africa National Institute for Metallurgy. The techniques used in the process are discussed, as are the shortcomings, problems and failures of the methods.
Keywords: Hydrometallurgy, Chlorination, Sulphide ores, Swinburne-Ashcroft process, Baker-Burwell process, Malm process, Comstock-Wescott process, Aldermac process, Mitterburg process, Mines Branch, South Africa, U.S. Bureau of Mines.
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Summary: This article attempts to relate the concept of utility to the risk involved when only a small number of projects (compared to their probability of occurrence) are accessible to a firm, and to quantify utility when other financial and physical parameters are known.
Publication: CIM Bulletin
Author(s): A. P. LeBis
Keywords: Mineral economics. Utility functions, Mine financing, Financial reports, Project valuation, Investment strategies.
Issue: 791
Volume: 71
Year: 1978
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Summary: In the past few years, much effort has been spent in elucidating the impact of diesel engines on the mine environment. This paper summarizes diesel fundamentals, exhaust emissions and typical tailpipe concentrations. Mine sampling results and an evaluation of exhaust treatment systems are discussed. A review of changes in pollutant concentrations between the tailpipe and the mine exit is made and suggestions are given to reduce operator exposure to diesel contaminants.
Publication: CIM Bulletin
Author(s): D. B. Stewart, P. Mogan, E. D. Dainty
Keywords: Environmental control, Underground mining, Diesel emissions, Ventilation, Exhaust systems, Pollution, Combustion products, Air sampling, Fume diluters, Water-bath conditoners, Catalytic purifiers.
Issue: 791
Volume: 71
Year: 1978
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Summary: This paper describes the Federal Government assistance available for northern mining development. The paper commences with a discussion of why the Federal Government should give assistance to northern mining development. It then uses a hypothetical case of a company which has a property it wants to develop to list the sectors within the Federal Government that would have to be consulted in order to obtain federal financial assistance. The paper also outlines the type of information a company...
Publication: CIM Bulletin
Author(s): Robert J. Shank
Keywords: Mine development, Northern mining, Governments, Federal Government, Financial assistance, Information, Ottawa.
Issue: 791
Volume: 71
Year: 1978
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Summary: This paper is the result of an intensive literature search and practical study of the problems experienced by a mining company with the frame cracking of their large-tonnage haulage trucks. It explains the advantages of particular HSLA steels for applications in the welded structures of such equipment. Examples of existing welds in truck frames are analyzed. Modern fatigue models and linear elastic fracture mechanics techniques are explained.
Publication: CIM Bulletin
Author(s): H. W. Wevers
Keywords: Equipment, Materials, Mining equipment, Steel, HSLA steels, Trucks, Welding, Maintenance. Fatigue models, Fracture mechanics.
Issue: 791
Volume: 71
Year: 1978
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Summary: In view of the many changes which have taken place since 1950 in the rules of the Income Tax Act concerning the deduction of exploration and development expenses, many corporate taxpayers each year face the tedious task of determining which particular rules their unclaimed exploration and development expenses are subject to and in what sequence these expenses are to be claimed.
Recent amendments to the Act have cleared up some of the mystery of the "ordering" of these deductions. This article...
Publication: CIM Bulletin
Author(s): R. D. Brown
Issue: 791
Volume: 71
Year: 1978
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Summary: Titanium and zirconium heavy minerals occur in the tailings streams from processing plants which use the hot-water extraction process for recovery of bitumen from tar sand.
In a research program conducted by Syncrude Canada Limited, the crude tailings stream was upgraded to produce quality zircon and titanium mineral products. To process the tailings through conventional upgrading equipment, bitumen residues must first be removed from the mineral grains. Then, by gravity separation, fines and...
Publication: CIM Bulletin
Author(s): Lloyd W. Trevoy, Ronald R. Goforth
Keywords: Industrial minerals, Tar sands. Athabasca tar sands. Oil sands, Environmental control, Tailings disposal, Titanium, Zirconium, Heavy minerals, Syncrude Canada Ltd.
Issue: 791
Volume: 71
Year: 1978
Text
Summary: Municipal governments recognize the importance of aggregates in the local economy and the need to manage this resource in the interest of the public good. They have encountered problems with regulating the industry and the dichotomy between the urban need and the rural source. They have suffered from a lack of financial benefit, an adequate aggregate inventory, provincial strategy, economic information and public understanding.
A provincial strategy for ensuring the availability of aggregate...
Publication: CIM Bulletin
Author(s): W. M. Tupper
Keywords: Industrial minerals, Aggregates, Mineral aggregates, Ontario, Resource management, Governments, Municipalities, Quarries.
Issue: 791
Volume: 71
Year: 1978
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Summary: The Key Anacon deposit lies about 6 miles northeast of the Brunswick No. 6 mine of Brunswick Mining and Smelting Corporation. Geological mapping, especially in the well-exposed Nepisiguit River section, geophysical data, and information from extensive underground and some surface drilling show that the rocks at Key Anacon are similar in many aspects of stratigraphy and structure to those of the Brunswick Mine area. They include narrow beds of fine acid volcanic material interpreted to be...
Publication: CIM Bulletin
Author(s): S. I. Saif, A. L. McAllister, W. L. Murphy
Keywords: Geology, Ore deposits, Key Anacon Mine, New Brunswick, Mineralization, Tetagouche Group, Structural geology, Lithology, Deformation, Alteration.
Issue: 791
Volume: 71
Year: 1978
Text
Summary: Pyrophyllite, an Al silicate used in the production of ceramic materials, is formed mainly by alteration of felsic to intermediate volcanic rocks, either directly (at temperatures of 250-300°C and pressures of 1-2 kbar) or by subsequent low-grade metamorphism of aluminous protoliths produced by thermal fluids or even by prolonged weathering. Most Pyrophyllite deposits in North America are concentrated in a belt of Late Precambrian volcanic and sedimentary rocks, the "Avalon Zone", which...
Publication: CIM Bulletin
Author(s): V. S. Papezik, H. F. Keats, J. Vahtra
Keywords: Pyrophyllite, Newfoundland, Precambrian, Volcanics, Metasomatic alteration, XRD analysis, Fox-trap deposit.
Issue: 791
Volume: 71
Year: 1978
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