All-hydraulic bucket-wheel excavators (A synopsis)

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Publication: CIM Bulletin
Auteur(s): MICHAEL T. G. BROWN
Mots clés: Trenching, Syncrude Canada Ltd., Beaver Creek dam, Tailings, Slurry handling, Peat deposits, Clays.
Numéro: 805
Volume: 72
Année: 1979
Texte
Publication: CIM Bulletin
Auteur(s): A. J. BROWN, B. S. HAYDON
Mots clés: Hydrometallurgy, Uranium, Ion-exchange processes, Liquid ion exchange, Resin ion exchange, Leaching, Acid leaching, RIX processes, Solvent extraction, Eleux process, Chem-Seps process.
Numéro: 805
Volume: 72
Année: 1979
Texte
Sommaire: 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
Auteur(s): RONALD B. DeDIEMAR
Numéro: 805
Volume: 72
Année: 1979
Texte
Sommaire: 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
Auteur(s): O. GARG, A. PICHE
Mots clés: Open-pit mining, Computers, Mine planning, Iron Ore Company of Canada, Geological data, Geotechnical data, Slope design, stability analysis, Dewatering, Grade estimates, Tonnage estimates.
Numéro: 805
Volume: 72
Année: 1979
Texte
Sommaire: 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
Auteur(s): J. JANESON
Mots clés: Open-pit mining, Pipe Mine, Wall control, Pit design, Drilling, Blasting, Perimeter blasting, Dowels.
Numéro: 805
Volume: 72
Année: 1979
Texte
Sommaire: 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
Auteur(s): J. L. BLAYLOCK
Mots clés: Hoist cylinders, Frames, Trucks, Equipment, Open-pit equipment, Wear, Steel, Welding, Repairs, Maintenance.
Numéro: 805
Volume: 72
Année: 1979
Texte
Sommaire: 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
Auteur(s): R. G. HAMM
Mots clés: Open-pit equipment, Shovels, Draglines, Western Canada, Hoist ropes, Wire ropes. Rope lay, Becket loops, Drum adaptors.
Numéro: 805
Volume: 72
Année: 1979
Texte
Sommaire: 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
Auteur(s): EDWARD MARTINEZ
Mots clés: Asbestos ore, Industrial minerals, Concentration, Magnetic concentration, Chrysotile, Black Lake mill, National mill, Lake Asbestos of Quebec, Tailings recovery.
Numéro: 805
Volume: 72
Année: 1979
Texte
Sommaire: 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
Auteur(s): JOHN D. GODFREY
Mots clés: Chipewyan Granite, Industrial minerals, Building stone, Alberta, Precambrian Shield, Lithology.
Numéro: 805
Volume: 72
Année: 1979
Texte
Sommaire: 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
Auteur(s): D. W. BOYDELL, P. A. LAXEN, D. W. BOSCH
Mots clés: Hydrometallurgy, Uranium recovery, Blyvooruitzicht Mine, Tailings, Gold tailings, Leaching, Acid leaching, Ion exchange, Solvent extraction, CIX systems, CCD circuits, Oxidants.
Numéro: 805
Volume: 72
Année: 1979
Texte
Sommaire: 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
Auteur(s): EDWARD R. ROSE
Mots clés: Rare earths, Cerium, Yttrium, Lanthanum, Prasoedymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium.
Numéro: 805
Volume: 72
Année: 1979
Texte
Sommaire: 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...
Publication: CIM Bulletin
Auteur(s): D. J. KING, P. M. BLYTHE
Mots clés: Hydrometallurgy, Uranium extraction, Fluidized-bed systems, Ion-exchange loading, CIX systems, Leaching, Acid leaching, Carbonate leaching, Solid-liquid separation, Clarification, Purification, Resins, Loading, Elution.
Numéro: 805
Volume: 72
Année: 1979
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