The impact of the design of uranium extraction plants due to the use of a fluidized bed solid ion exchange loading system

Abstract The development in recent years of a fluidized bed system for use as a counter-current solid ion exchange loading contactor for the purification and concentration of uranium from leach liquors has had a major impact on the design of uranium extraction plants. The main object of this paper is to describe many of the variations that can be applied to the design of uranium extraction plants arising from the use of a fluidized bed loading contactor with a view to providing a guide for the development of a flowsheet for a new uranium extraction plant.The paper has been devoted primarily to the consideration of conventional uranium extraction plants in which a ground ore is leached in mechanically or air agitated tanks. The effect of the use of a fluidized bed loading contactor on each of the plant sections from leach to uranium purification and concentration has been considered.In order to describe most effectively the impact of using a fluidized bed solid ion exchange loading contactor, its use has been compared with the performance that can be achieved with the most common alternative purification processes. The comparisons are made largely on a technical basis, but the effect on the capital and operating costs of the different uranium extraction flowsheets are described qualitatively.In making these comparisons, consideration is given to the effect on the size, number and materials of construction of equipment items and how the quantity and composition of the liquid effluents can be controlled to reduce the environmental problems arising from the disposal of these effluents.The paper also discusses some of the factors that should be taken into consideration in the design of a fluidized bed loading contactor and describes various designs of the elution section that can be used in conjunction with the loading contactor.
Keywords: Hydrometallurgy, Uranium extraction, Fluidized-bed systems, Ion-exchange loading, CIX systems, Leaching, Acid leaching, Carbonate leaching, Solid-liquid separation, Clarification, Purification, Resins, Loading, Elution.
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Publication: CIM Bulletin
Author(s): WALTER DURST
Issue: 805
Volume: 72
Year: 1979
Text
Publication: CIM Bulletin
Author(s): MICHAEL T. G. BROWN
Keywords: Trenching, Syncrude Canada Ltd., Beaver Creek dam, Tailings, Slurry handling, Peat deposits, Clays.
Issue: 805
Volume: 72
Year: 1979
Text
Publication: CIM Bulletin
Author(s): A. J. BROWN, B. S. HAYDON
Keywords: Hydrometallurgy, Uranium, Ion-exchange processes, Liquid ion exchange, Resin ion exchange, Leaching, Acid leaching, RIX processes, Solvent extraction, Eleux process, Chem-Seps process.
Issue: 805
Volume: 72
Year: 1979
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Summary: This paper will present the intrinsic factors of a cone crusher that affect performance, develop and define an ideal feed gradation for a cone crusher and, finally, bring out an important new development in computer design of crushing chambers and show an ability to predict crusher performance without trial-and-error methods.
Publication: CIM Bulletin
Author(s): RONALD B. DeDIEMAR
Issue: 805
Volume: 72
Year: 1979
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Summary: This paper summarizes the computer applications in open-pit mine planning at the Iron Ore Company of Canada (IOC). A brief history of the use of computers at IOC is given, and a description of the existing facilities is outlined. The following systems are discussed: storage and retrieval of geological data; geotechnical data analysis; long-term grade and tonnage forecasting; ore grading; and open-pit mine design. Justification for using computers in open-pit mine planning is given, and...
Publication: CIM Bulletin
Author(s): O. GARG, A. PICHE
Keywords: Open-pit mining, Computers, Mine planning, Iron Ore Company of Canada, Geological data, Geotechnical data, Slope design, stability analysis, Dewatering, Grade estimates, Tonnage estimates.
Issue: 805
Volume: 72
Year: 1979
Text
Summary: Wall control at the Pipe Open Pit is of primary importance in ensuring the long-term stability of the operation, while keeping costs to a minimum. Blasting techniques have been adapted to the variations in competence and structure of the wall rocks. A portion of the perimeter wall is being developed in incompetent peridotite. A recent change in pit slope design provides a wide safety berm on alternate benches. A support program which consists of pinning the crests of wide berms with vertical...
Publication: CIM Bulletin
Author(s): J. JANESON
Keywords: Open-pit mining, Pipe Mine, Wall control, Pit design, Drilling, Blasting, Perimeter blasting, Dowels.
Issue: 805
Volume: 72
Year: 1979
Text
Summary: Normally, the hydraulic system and structures are considered to be unrelated items. In reality, the two cannot be separated because one affects and depends on the other to function properly. This paper explores the potential failure areas of hydraulic cylinders, and suggests possible methods to prevent failures from occurring. The use of high-strength low-alloy steel in frames is reviewed and the benefits discussed. Fabrication techniques and handling of material are noted in the hope that...
Publication: CIM Bulletin
Author(s): J. L. BLAYLOCK
Keywords: Hoist cylinders, Frames, Trucks, Equipment, Open-pit equipment, Wear, Steel, Welding, Repairs, Maintenance.
Issue: 805
Volume: 72
Year: 1979
Text
Summary: A brief outline covering the shovels and draglines in use in the open-pit mines of Western Canada, including British Columbia, Alberta and the Yukon, is given, followed by the procedure for the selection of the correct wire rope for each application. Such factors as wire rope constructions, lay directions and types of cores are mentioned. Once the correct wire rope has been selected, there are various factors that can affect the service life of the rope and the reduction of down-time during...
Publication: CIM Bulletin
Author(s): R. G. HAMM
Keywords: Open-pit equipment, Shovels, Draglines, Western Canada, Hoist ropes, Wire ropes. Rope lay, Becket loops, Drum adaptors.
Issue: 805
Volume: 72
Year: 1979
Text
Summary: Laboratory studies had shown that the magnetite contained in serpentine asbestos ore was not uniformly distributed. Ore particles containing chrysotile fiber responded to a magnetic field; particles containing little or no chrysotile were essentially non-magnetic. Larger-scale tests, run with a magnetic pulley being fed various asbestos samples ranging in size from 1/4 inch to 5 inches, confirmed that magnetic separation could be used as a concentration step in an asbestos mill.Magnetic...
Publication: CIM Bulletin
Author(s): EDWARD MARTINEZ
Keywords: Asbestos ore, Industrial minerals, Concentration, Magnetic concentration, Chrysotile, Black Lake mill, National mill, Lake Asbestos of Quebec, Tailings recovery.
Issue: 805
Volume: 72
Year: 1979
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Summary: Geological mapping on the Canadian Shield in northeastern Alberta outlined several granitoid rock masses potentially suitable as building stone. A particularly attractive prospect, the Chipewyan Red Granite, was subjected to an aerial survey and ground check. The petrologic and fracture characteristics critical for quarrying and use as a building stone were assessed in the course of detailed mapping at two of the most favourable sites. The extension of good rock was tested to shallow depths...
Publication: CIM Bulletin
Author(s): JOHN D. GODFREY
Keywords: Chipewyan Granite, Industrial minerals, Building stone, Alberta, Precambrian Shield, Lithology.
Issue: 805
Volume: 72
Year: 1979
Text
Summary: The response of reclaimed gold tailings to acid leaching was investigated in the laboratory, followed by a pilot-plant program in which the operations of CCD, ClX and SX were tested with plant feed material.These results formed the basis for the design of the extension to the existing uranium plant at Blyvooruitzicht Gold Mine, commissioned in July 1977. This circuit consists of slimes-dam reclamation by bucket-wheel excavator at a rate of 100,000 t solids per month, acid leaching in...
Publication: CIM Bulletin
Author(s): D. W. BOYDELL, P. A. LAXEN, D. W. BOSCH
Keywords: Hydrometallurgy, Uranium recovery, Blyvooruitzicht Mine, Tailings, Gold tailings, Leaching, Acid leaching, Ion exchange, Solvent extraction, CIX systems, CCD circuits, Oxidants.
Issue: 805
Volume: 72
Year: 1979
Text
Summary: This paper summarizes and emphasizes the potential importance of Canadian rare-earth occurrences, and recommends that efforts to locate and evaluate rare-earth deposits should be increased. Increasing world markets, depending on intensive applied research into the numerous unique and remarkable chemical and physical properties of the rare-earth elements (REE), are developing; their properties and uses are becoming better known; methods of separation are much improved.The REE group comprises a...
Publication: CIM Bulletin
Author(s): EDWARD R. ROSE
Keywords: Rare earths, Cerium, Yttrium, Lanthanum, Prasoedymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium.
Issue: 805
Volume: 72
Year: 1979
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