Tax concerns persist

Cette publication n'est pas offerte dans votre langue; certains de ses renseignements ont été préremplis pour la version française.
Accés complet à Document technique
Version PDF pour 20,00 $
Recherche
Trier par :  Pertinence
Affichage des résultats 1 - 8
Texte
Sommaire: This paper provides background information on the expansion programs of Rio Algom Limited at Elliot Lake. Included are details on the Quirke expansion program, the Panel mine rehabilitation program, including the selection procedure for the tailings containment area, the Stanleigh mine rehabilitation program, housing, government regulations and the Environmental Assessment Board hearings.
Publication: CIM Bulletin
Auteur(s): K. B. CULVER
Mots clés: Hydrometallurgy, Rio Algom, Elliot Lake, Preston Mines, Quirke mine, Panel mine, Stanleigh mine, Housing, Licencing, Environmental Assessment Board.
Numéro: 819
Volume: 73
Année: 1980
Texte
Sommaire: Addressing a current operating and environmental concern, this paper first presents an overview of the design program for an underground radioactive waste storage vault. It then reviews the construction, operational and thermal-mechanical aspects of such a project. The relevant experience from major underground construction projects is reviewed, and the paper concludes with brief comments on the design-oriented research and development requirements.
Publication: CIM Bulletin
Auteur(s): A.S. BURGESS, R.G. CHARLWOOD, J.L. RATIGAN
Mots clés: Waste disposal, Radioactive waste, Environmental control, Underground storage, Vault design, Rock mechanics.
Numéro: 819
Volume: 73
Année: 1980
Texte
Sommaire: A 28-year study of cross folds leads to the conclusion that the northwest-southeast folds recognized in many areas of North America are part of a regional pattern. Detailed examination of over 650 geological maps and reports of Ontario indicates that this folding can be traced across the province. Evidence is presented that this fold pattern played an important part in determining the pattern and scale of intrusion, that its recognition in the field can aid in defining stratigraphy, folding...
Publication: CIM Bulletin
Auteur(s): S.V. BURR
Mots clés: Structural geology, Economic geology, Folding, Ontario, Porcupine area, Red Lake area, Manitou Lake area, Elliot Lake area, Cobalt, Uranium, Thorium, Nickel, Gold.
Numéro: 819
Volume: 73
Année: 1980
Texte
Sommaire: Monometallic zinc mineralization associated with marbles of the Grenville Supergroup in the Mont-Laurier Basin of Quebec is found to be stratiform and to occur (1) within limited zones ofdolomitic marble and (2) more precisely along contacts between these marbles and adjacent metaclastic units. Massive sphalerite with accompanying pyrrhotite and pyrite is the prime exploration target, and commonly gives rise to good geochemical anomalies, but generally weak and ambiguous geophysical responses...
Publication: CIM Bulletin
Auteur(s): M. GAUTHIER, A.C. BROWN
Mots clés: Stratiform deposits, Zinc, Grenville, Marble, Dolomite, Exploration, Geochemistry, Geophysics, Mont-Laurier Basin.
Numéro: 819
Volume: 73
Année: 1980
Texte
Sommaire: Background information relative to the concerns for diesel paniculate emissions is reviewed. A review of the most advanced methods for measuring ambient levels of diesel pollutants is presented. Measured pollutant levels in two metal mines are summarized, including a ranking of pollutants based on their measured levels. The measured levels are related to the "health effects index".The various methods of controlling miner exposure to pollutant levels are reviewed. The control...
Publication: CIM Bulletin
Auteur(s): JOHN H. JOHNSON
Mots clés: Diesel equipment, Underground mining, Exhaust control, Particulate emissions, Pollutants, Quantizer, White Pine Mine, Brushy Creek Mine, Ventilation, Mine safety, Health.
Numéro: 819
Volume: 73
Année: 1980
Texte
Sommaire: This paper describes the recent pilot-plant work carried out on two alternative processes capable of producing an effluent containing less than 10 pCi/L total radium-226 activity and very close to 3 pd/L dissolved radium-226. The processes incorporate coprecipitation of radium with barium sulphate by the addition of barium chloride in continuously stirred tank reactors followed by either chemical coagulation with ferric chloride, flocculation and clarification, or polymer-aided dual-media...
Publication: CIM Bulletin
Auteur(s): D. MOFFETT, L. WHITTLE, D. AVERILL, G. KASSAKHIAN, R. WEBBER
Mots clés: Hydrometallurgy, Radium, Uranium mill effluents, Environmental control, Tailings ponds, Barium chloride, Quirke mine, Precipitation, Flocculation, Clarification, Sand filters.
Numéro: 819
Volume: 73
Année: 1980
Texte
Sommaire: Laboratory-scale hydrochloric acid leach tests were conducted on an Elliot Lake uranium ore. Hydrochloric acid leaches without an oxidant or with molecular oxygen (i.e., air or pure oxygen gas) as an oxidant favoured uranium and radium extractions. Conditions for maximum uranium, thorium and radium extractions with hydrochloric acid in the presence of sodium chlorate were determined. The highest extractions of uranium (96%), thorium (81%) and radium (91%) were obtained using a mixture of 44.0...
Publication: CIM Bulletin
Auteur(s): K.E. HAQUE, B.H. LUCAS, G.M. RITCEY
Mots clés: Hydrometallurgy, Extractive metallurgy, Leaching, Hydrochloric acid leaching, Uranium extraction, Elliot Lake, Thorium extraction, Radium extraction, Ore processing, Environmental control.
Numéro: 819
Volume: 73
Année: 1980
Texte
Sommaire: There are a number of nitrate-containing wastewater sources, as concentrated as 30 wt% NO3- and as large as 2000 m3/day, in the nuclear fuel cycle. The biological reduction of nitrate in wastewater to gaseous nitrogen, accompanied by the oxidation of a nutrient carbon source to gaseous carbon dioxide, is an ecologically sound and cost-effective method of nitrate waste disposal.These nitrate-containing wastewater sources can be successfully biologically denitrified to meet discharge standards...
Publication: CIM Bulletin
Auteur(s): W.W. PUT
Mots clés: Hydrometallurgy, Biological reduction, Reduction, Nitrate wastewater, Bioreactors, Fluidized-bed bioreactors, Denitrification, Effluent treatment.
Numéro: 819
Volume: 73
Année: 1980
Activé par Coveo Enterprise Search