T.L. leaching process: recent applications to difficult-to-treat copper ores

Mots clés : Thin layer leaching;Leaching;Solvent extraction;Electrowinning;Copper ores;Hydrometallurgy
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Publication: CIM Bulletin
Auteur(s): D. NIKOLS, G. CARAGHIAUR, P.C. ROXBURGH
Numéro: 887
Volume: 79
Année: 1986
Texte
Sommaire: Three methods were tested for the beneficiation of aluminum scrap, generated by heavy medium separation of non-ferrous automobile scrap residue. These were: crushing in a shredder followed by screening; grinding in a ball mill followed by screening; and eddy current separation. The best results were obtained with the grinding-screening method.
Publication: CIM Bulletin
Auteur(s): V. ITKIN
Mots clés: Mineral processing technology, Beneficiation, Aluminum, Grinding, Crushing, Comminution, Automobile Scrap, Ball mills, Screening, Eddy current separation
Numéro: 887
Volume: 79
Année: 1986
Texte
Sommaire: Investors in flow-through shares are going to need an expanded road map to find their way through a growing maze of tax rules affecting such shares. At the end of 1985, no fewer than three new sets of important tax amendments were tabled which could have a significant effect on flow-through share issues. This proposed legislation is discussed this month in Tax Notes.
Publication: CIM Bulletin
Auteur(s): ROBERT B. PARSONS
Numéro: 887
Volume: 79
Année: 1986
Texte
Sommaire: A brief visit to European longwall mining operations in potash showed that retreating longwall mining provides a very attractive alternative to room-and-pillar mining, especially in areas with bad roof, narrow seams and areas with high ground pressures. Mines de Potasse d'Alsace, France converted all potash operations to longwall mining in 1980. Recovery rates per panel vary between 75% to 85% which compares very favourably with Saskatchewan values. Ground pressure in Saskatchewan are...
Publication: CIM Bulletin
Auteur(s): G. HERGET
Mots clés: Potash, Potash mining, Longwall mining, Rock mechanics, Spain, France, U.S.S.R
Numéro: 887
Volume: 79
Année: 1986
Texte
Sommaire: The gas sorption and emission characteristic of coals are important to the planning and conduct of mining operations. Methane drainage from coal strata can also provide a supply of fuel in certain circumstances. Gas emissions have also created hazards during the handling and transport of coals and the release of gas also appears to be related to the yield of fine sizes during mining and processing operations.
This paper summarizes studies at the University of Alberta on the permeability and...
Publication: CIM Bulletin
Auteur(s): T.H. PATCHING, M.W. MIKHAIL
Mots clés: Research, Development, Gas sorption, Desorption, Gas emission, Methane, Carbon dioxide, Coal, Underground mining
Numéro: 887
Volume: 79
Année: 1986
Texte
Sommaire: Mineral deposits are where you find them; they have no allegiance to territorial boundaries. Over the past decade much of the new investment in mining has been outside of continental North America, let alone Canada. The larger Canadian Banks have pursued this offshore business through their multi-national organizations; this reflects both the increasingly international orientation of today's business environment, and to a degree, the competitive advantage of these offshore developments.
The...
Publication: CIM Bulletin
Auteur(s): P.O. WATERS
Mots clés: Mineral economics, Mining industry, Mine financing. Less developed countries, Markets, International trade, Mineral development, Investments
Numéro: 887
Volume: 79
Année: 1986
Texte
Sommaire: In cooperation with the Ontario Ministry of Natural Resources, selected deposits of Potsdam sandstone in the Ottawa-Kingston area were core-drilled and evaluated by CANMET as potential glass and foundry sand. Analyses of cores ranged from 84.6 to 98.5% SiO2, 0.09 to 0.65% Fe2O3, and 0.07 to 2.10% Al2O3. The cores were largely composed of white to grey, relatively tough sandstone. Impurities included iron as pyrite, iron oxides and staining on the quartz grains; carbonates as calcite; and...
Publication: CIM Bulletin
Auteur(s): R.K. COLLINGS
Mots clés: Industrial minerals, Silica, Potsdam sandstone, Glass sand, Foundry sand, Beneficiation, Processing
Numéro: 887
Volume: 79
Année: 1986
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