The Davy McKee combined mixer-settler: a novel approach to solvent extraction

Abstract The Davy McKee combined mixer-settler (CMS), is a liquid-liquid contactor, which has been commercially applied to the recovery of uranium from dilute sulphuric acid-bearing leach liquors. CMS differs from most other solvent extraction systems in that the mixing and separation of the phases is carried out in the same vessel.
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Summary: Devices and flowsheets for recovering fine placer gold are reviewed. Inefficiencies of gravity processing techniques are documented and discussed. Prospects of combining gravity and froth flotation techniques are presented. Possibilities of using other separation techniques, such as magnetic and electrostatic devices are also discussed.
Publication: CIM Bulletin
Author(s): WANG WENQIAN, GEORGE W. POLING
Keywords: Mineral processing, Placer gold, Gold recovery, Gravity concentration, Flotation, Froth flotation, Batch flotation
Issue: 860
Volume: 76
Year: 1983
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Summary: The largest Canadian Lamella thickener installation to date, with 13,600 square feel of effective clarification area, is being successfully operated at the Rocanville Division of the Potash Corporation of Saskatchewan. This paper describes the operational principles and design features of the Lamella thickener, the testwork leading to its specification for the Rocanville phase two expansion project and a review of the performance of the full-size unit which was ultimately installed.
Publication: CIM Bulletin
Author(s): GARTH A. MAKI, DOUGLAS M. SMITH
Keywords: Mineral processing, Potash Corporation of Saskatchewan, Rocanville, Lamella thickener, Thickeners, Installation, Maintenance, Capital cost
Issue: 860
Volume: 76
Year: 1983
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Summary: Commercial coal mining has been recorded in Nova Scotia since 1863 and during I his period an estimated 60,000,000 short tons of mine discard containing 10 to 30% coal has been accumulated. Approximately 70% of these dumps are in the Cape Breton region and most are owned by the Cape Breton Development Corporation (CBDC), formerly DEVCO.
The explosion of oil produced energy costs which created an increase in thermal coal demand as well as the desire to rehabilitate abandoned mine dumps...
Publication: CIM Bulletin
Author(s): GODFREY W. McDONALD, DENNIS E. FREDRICKSON
Keywords: Mineral processing, Coal reclamation, Summit Mine dump, Prince Mine dump, Environmental control, Wastes, Cape Breton coal, Thermal coal, Coal washing plant, Coal cyclone plant
Issue: 860
Volume: 76
Year: 1983
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Summary: Le rebroyage des concentres d'hematite en usine (Sidbec-Normines, Port-Cartier) et en laboratoire a etc modelise selon le modele de Reid (1965).
L 'effet du pourcentage solide sur la cinetique de broyage a ete etudie en usine. La fonction de selection corrigee (pour tenir compte de I'effet du pourcentage solide sur le temps de retention) augmente lorsque le pourcentage solide augmente de 80 a 84 pourcent. Cette amelioration est contrebalancee par une augmentation de la quantite de pulpe...
Publication: CIM Bulletin
Author(s): ANDRÉ R. LAPLANTE, JOHN REDSTONE
Keywords: Ball milling, Modelling, Specular hematile, Selection function, Residence time, Slurry densily
Issue: 860
Volume: 76
Year: 1983
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Summary: As a monitor of the processes involved in the formation of granitoid mineral deposits the coherent group behaviour of the rare earth elements (REE) actively reflects changing fluid characteristics. For example, in the porphyry environment, magmatic-hydrothermal fluids produce potassic alteration with strong enrichment in the light rare earth elements (LREE), reflecting their high pH, low fluid/rock ratios, and the dominant role of Cl- complexing in metal (i.e. Cu, Au) transport. With...
Publication: CIM Bulletin
Author(s): P.P. TAYLOR, B.J. FRYER
Keywords: Rare earth elements, Geochemistry, Mineral deposits, Porphyry deposits, Granophile deposits, Peralkaline granites, Fluid inclusions, Isotope studies, Ore genesis, Mineral exploration
Issue: 860
Volume: 76
Year: 1983
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Summary: Automatic flotation control in varying degrees of sophistication is practiced at a number of concentrators throughout the world. Practically, the variable conditions in the flotation circuit and the difficulty in maintaining accurate instrumentation information all add to the complexity of automatic control.
Further development at the Kidd Creek concentrator has resulted in a 3075 mtpd copper flotation circuit capable of running twenty-four hours a day under the direct control of an optimizin...
Publication: CIM Bulletin
Author(s): PHILIP THWAITES
Keywords: Mineral processing, Kidd Creek Mines Ltd., Concentrators, Flotation control, Computer control, Copper-zinc ores
Issue: 860
Volume: 76
Year: 1983
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