Copper and nickel smelting with virtually zero gas emission - A vision for the future

Abstract irtually zero gas emission smelting is promoted as a means for securing environmental advantages and the general publicÕs acceptance. Concerns about climate change will increasingly make it more difficult for new primary metals projects to come to fruition unless greenhouse gas emissions are decreased. Assuming a sustainable market for sulphuric acid is not locally available, the next best option is high temperature reaction of strong SO2 with limestone or dolomite. This is followed by CO2 liquefaction and disposal either underground or in the deep ocean. The VoiseyÕs Bay nickel project is cited as an example where appropriate location of a new smelter close to large dolomite or limestone deposits would lead to a virtually zero gas emission operation. Most of the electrical energy required for producing technically pure oxygen and for liquefying CO2 and transporting it to disposal can be derived from smelting a bulk sulphide concentrate and then reacting SO2 at high temperature. Provided the smelter gases are properly cleaned before sulphur fixation, the sulphated stone should be uncontaminated
Keywords: Metallurgy, Smelting, Copper, Nickel, Gas emission.
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Summary: One of the corporate values mentioned by many companies deals with respect for people. This paper discusses one aspect of this value, namely, the need for clarity of accountabilities and authorities. The job of the manager in achieving this goal is analyzed and the benefits of enhancing the manager-employee conversation outlined.
Publication: CIM Bulletin
Author(s): M.J. Daniel
Keywords: Human Resources.
Issue: 1031
Volume: 92
Year: 1999
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Summary: Crucible slag tests were employed to evaluate different refractory brick classes for the Cerro Matoso electric furnace. Comprehensive analysis was conducted to evaluate the crucible erosion and characterize any slag/refractory reaction products.
The classes of refractories investigated were:
• tar-impregnated magnesia;
• rebonded fused grain magnesia-chrome;
• direct bonded magnesia-chrome;
• alumina-chrome;
• picrochromite; and
• magnesia-alumina (spinel).
It was concluded that tar-impregnat...
Publication: CIM Bulletin
Author(s): J.R. Donald, P.H. Lauzon, J. Duran, R. Parra, L. Tejeda, C. Matoso
Keywords: Metallurgy, Refractory brick, Crucible slag tests.
Issue: 1031
Volume: 92
Year: 1999
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Summary: The recycling of wastepaper has become an important and common process worldwide. Techniques similar to those used in the mineral processing industry are used to produce high quality recycled fibres for use in newsprint. The mineral processing group at McGill University, in conjunction with the Pulp and Paper industry (Mechanical and Chemi-mechanical Wood Pulp Network), has adapted one of these techniques, column flotation, for the purpose of deinking wastepaper. This article describes the...
Publication: CIM Bulletin
Author(s): C.A. Hardie, G.F. Leichtle, J.A. Watson, J.A. Finch, C.O. Gomez
Keywords: Mineral processing, Recycling, Wastepaper, Deinking.
Issue: 1031
Volume: 92
Year: 1999
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Summary: A study, part of a doctoral dissertation (Matthias, 1991), was conducted during 1987 and 1988 to establish the means by which professionals assess and maintain their competence during the various stages of their careers. The study elicited responses from fifty-nine subjects representing engineering, pharmacy and medicine (twenty subjects from engineering, nineteen from pharmacy and twenty from medicine) on their perception and assessment of continuing competence. The findings revealed a wide...
Publication: CIM Bulletin
Author(s): M. Matthias
Keywords: Human resources, Education.
Issue: 1031
Volume: 92
Year: 1999
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