Radiation in uranium mines:A manual of radon gas emission characteristics and techniques for estimating ventilating air requirements

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Mots clés : Environmental control;Radiation;Uranium mines;Ventilation;Radioactive theory;Radon;Thermal diffusion
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Texte
Sommaire: The Ontario Ministry of Natural Resources has recently initiated several incentive programs to encourage and facilitate the development of new mines in northwestern Ontario. Some are privatized out to consultants and contractors. The status of three of these programs will be reviewed in this paper.
Publication: CIM Bulletin
Auteur(s): R.C. BEARD
Mots clés: Mining operations, Ontario Ministry of Natural Resources, Incentive programs, Exploration, Surveys, Consultants, Gold reserves, Custom milling.
Numéro: 845
Volume: 75
Année: 1982
Texte
Sommaire: Overland conveyor systems to transport bulk materials from mines to processing plants or load-out stations have to be seriously considered as the viable alternative to truck and train haulage systems. With the ever-increasing price of diesel fuel, conveyors with their electrical drives generally prove to be the least costly when operating and maintenance expenses are analyzed for the life of the installation.
Publication: CIM Bulletin
Auteur(s): DONALD C. CRAIGHEAD
Mots clés: Conveyors, Belt conveyors, Transportation, Materials Handling, Electrical drives, Control systems.
Numéro: 845
Volume: 75
Année: 1982
Texte
Sommaire: Part 1 of this paper, published in the August issue, covered lithochemical surveys based on major, minor and trace elements in whole-rock samples from primary enveloping halos.Part 2, which follows, continues with discussions of surveys based on leakage halos, zonation of elements, stable and radioactive isotopic distributions, and geothermometric, geobarometric, thermoluminiscent, pedochemical, hydrochemical, atmochemical and biogeochemical methods. It concludes with a selected bibliography.
Publication: CIM Bulletin
Auteur(s): R.W. BOYLE
Mots clés: Exploration, Geochemical exploration, Mineral deposits, Blind mineral deposits, Metallogenic provinces, Lithochemical methods, Enveloping halos, Leakage halos, Carbonatites, Pegmatites, Skarn, Hornfels, Vein deposits, Massive sulphides, Carbonate-hosted deposits, Porphyry deposits.
Numéro: 845
Volume: 75
Année: 1982
Texte
Sommaire: A common problem in the mining industry involves the overloading of established conveyor systems. This overloading can have a number of causes, such as new production technology or a changing market condition which increases demand. An overloaded system usually spells disaster and leads to clean-up problems, equipment failures and lost production. The Cape Breton Development Corporation's Lingan Mine had a serious overloading situation on its underground coal clearance system, and equipment...
Publication: CIM Bulletin
Auteur(s): J.A. STEWART
Mots clés: Conveyors, Belt conveyors, Booster drives, Lingan Mine, Underground mining, Drive units.
Numéro: 845
Volume: 75
Année: 1982
Texte
Sommaire: Barite is used extensively by the oil and gas well-drilling industry as a weighting agent. It is particularly well suited for drilling mud because of its qualities; it is non-abrasive, heavy, virtually inert chemically, easy to handle and inexpensive compared to other available heavy materials. Increased deep well drilling in Western Canada, and especially in the Arctic regions, could dramatically affect the demand for barite through this decade. Known deposits in northeast British Columbia...
Publication: CIM Bulletin
Auteur(s): L. NUTTER, J. CLANCY
Mots clés: Industrial minerals, Barite, British Columbia, Drilling muds, Mineral King property, Brisco property, Silver Giant Mine, Imports.
Numéro: 845
Volume: 75
Année: 1982
Texte
Sommaire: For decades, writers have expressed concern about impending shortages of professionals for Canada's minerals industry. Even under the present difficult economic circumstances, it is anticipated that the supply which will be available will not be adequate to meet the requirements in certain key areas-including mining and petroleum engineering. It is evident that, unless further initiatives are taken, shortages will exist for some time.In this paper, the writer reviews information which relates...
Publication: CIM Bulletin
Auteur(s): JOHN E. UDD
Mots clés: Education, Minerals industry, Manpower, Mining engineering, Geology, Geophysics, Metallurgical engineering.
Numéro: 845
Volume: 75
Année: 1982
Texte
Sommaire: Belt conveyors, because of their low capital and operating costs and inherent flexibility in handling a wide variety of products, have numerous applications in the mining industry. With the increased emphasis on improving the workplace environment, dust emissions from belt conveyors at transfer and other points have become a significant problem for many applications.The paper reviews belt conveyor dust control technology and compares dust emissions from belt conveyor systems with other...
Publication: CIM Bulletin
Auteur(s): H.D. GOODFELLOW, M. BENDER
Mots clés: Conveyors, Belt conveyors, Environmental control, Dust control, Transfer points, Transportation.
Numéro: 845
Volume: 75
Année: 1982
Texte
Sommaire: For 25 chemical elements in electrostatically precipitated fly ash (Lingan coal-fired power station), concentration changes are studied as a function of increasing proportions of fines (ash particle diameter less than 45 micrometres). Elements that are involved when concentrations increase as the proportions of fines increase are likely to escape into the atmosphere. These are Th, U, As, S, P, Sb, Na, Ag, Zn, Pb, Ni, Ba, Sc, Al, Mo (and Bi, Ge, Ga, F and Li), i.e., more or less highly...
Publication: CIM Bulletin
Auteur(s): ERWIN L. ZODROW
Mots clés: Coal combustion, Power plants, Ash analysis, Potential Atmospheric pollution, Spinels, Bottom slag, Environmental control, Lingan Plant.
Numéro: 845
Volume: 75
Année: 1982
Texte
Sommaire: The Outokumpu Flash Smelting Process was put into commercial operation in 1949. The original process was based on the use of preheated air.The adoption of oxygen enrichment of the flash smelting process air in 1971 was a crucial improvement, especially for smelter capacity. Oxygen use according to the Outokumpu method means selection of the most suitable oxygen content for the process air on the basis of the concentrate composition, capacity and matte grade. The furnace is not bound to only...
Publication: CIM Bulletin
Auteur(s): B.ANDERSSON, P. HANNIALA, S. HARKKI
Mots clés: Pyrometallurgy, Oxygen, Outokumpu, Flash smelting, Harjavalta Works, Smelting, Copper smelting, Nickel smelting, Converting, Sulphur recovery
Numéro: 845
Volume: 75
Année: 1982
Texte
Sommaire: The coal deposits from Cape Perce on Cape Breton Island have been known to supply the coal requirements of the people living in or visiting the area for close to 300 years.A major block of coal has been identified off Cape Perce, which has several seams from which coal can be taken. The initial development by the Cape Breton Development Corporation will be in the Harbour Seam and constitutes the Donkin-Morien Development Project.The CBDC's confidence in this indicated resource is based on its...
Publication: CIM Bulletin
Auteur(s): J.J. GILLMAN
Mots clés: Coal mining, Donkin-Morien Project, Underground mining, Tunnel boring machines, Ventilation, Electrical systems.
Numéro: 845
Volume: 75
Année: 1982
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