Drilling hard siliceous sandstone strata effectively

Cette publication n'est pas offerte dans votre langue; certains de ses renseignements ont été préremplis pour la version française.
Mots clés : Drilling;Sandstone;Roof bolting;Underground mining;Coal Mining;Penetration rates;Water-head drills
Accés complet à Document technique
Version PDF pour 20,00 $
Recherche
Trier par :  Pertinence
Affichage des résultats 1 - 10
Texte
Sommaire: This paper describes the background and markets for calcium carbonate and silica sand in Canada, as well as the results of recent test work carried out at the Ontario Research Foundation. Tests on sericite, tremolite, vermiculite, barite and graphite are also mentioned.
Publication: CIM Bulletin
Auteur(s): P. D. R. MALTBY
Mots clés: Beneficiation, Industrial minerals, Calcium carbonate, Silica sand, Glass, Mineral processing.
Numéro: 803
Volume: 72
Année: 1979
Texte
Sommaire: The safe-level dilution of low-level radioactive wastes in large volumes of selected granular material is proposed as an alternative method of permanent waste disposal to current Canadian practice of concentration and encapsulation. Accepting the fact that a "background level" of radioactivity exists throughout the world, the authors feel that the concept of controlled dilution of radioactive wastes to a level in keeping with "background" is a plausible alternative to...
Publication: CIM Bulletin
Auteur(s): T. R. CHARI, T. W. KIERANS, W. G. WEGENAST
Numéro: 803
Volume: 72
Année: 1979
Texte
Sommaire: Mercury balances have been obtained for the flotation circuits at Pamour Porcupine Mines, Timmins, Ontario, and at Brunswick Mining and Smelting Corporation, Bathurst, New Brunswick. The mineral form of mercury in both deposits has been ascertained. At Pamour Porcupine, the mercury is approximately evenly divided among sphalerite, native silver-electrum and tetrahedrite-tennantite; at Brunswick Mining, this element is contained mostly in the sphalerite, although tetrahedrite (and possibly...
Publication: CIM Bulletin
Auteur(s): J. E. DUTRIZAC, T. T. CHEN
Mots clés: Mercury, Sulphide concentrates, Flotation, Pamour Porcupine Mines, Brunswick Mining and Smelting, Sphalerite, Silver, Tetrahedrite, Tennantite, Copper concentrates, Zinc concentrates.
Numéro: 803
Volume: 72
Année: 1979
Texte
Sommaire: A laboratory-scale batch extraction unit and operating procedure for studying the hot-water separation of bitumen from Athabasca tar sands are described. The extractor evolved from earlier units and has been in use by Syncrude Research for the past 10 years. By using a unit such as this, it is possible to study tar sand feed quality and the effects of chemicals on the hot-water extraction process, while process variables are held constant. Data are presented to demonstrate the importance of...
Publication: CIM Bulletin
Auteur(s): E. C. SANFORD, F. A. SEVER
Mots clés: Tar sands, Athabasca tar sands, Batch extraction, Bitumen separation, Syncrude, Surfactants, Flotation, Tailings.
Numéro: 803
Volume: 72
Année: 1979
Texte
Sommaire: Laboratory studies suggest that improvements of coke strength brought about by pre-heating caking coals before carbonization accrue from inadvertent oxidation rather than from other low-temperature changes in the coal mass. Controlled oxidation of highly caking coal, followed by laboratory carbonization, produces cokes which, in terms of a laboratory scale tumble test index, are equivalent to those obtained from prime metallurgical blends. Appropriately formulated blends of exhaustively...
Publication: CIM Bulletin
Auteur(s): B. IGNASIAK, D. CARSON, P. JADERNIK, N. BERKOWITZ
Mots clés: Coke, Metallurgical coke, Coal, Caking coal, Fuels, Appalachian coals, Oxidation, Dilatation, Fluidity.
Numéro: 803
Volume: 72
Année: 1979
Texte
Sommaire: A 2-hectare uranium tailings area has been reclaimed. The exposed tailings of 1.4 hectares were capped with glacial till and vegetated with grasses and legumes. The water running through the tailings was diverted around the tailings in a line ditch and treated with sodium hydroxide and barium chloride. Difficulties occurred in placing the till capping because of the low bearing strength and the uneven surface of the tailings. This led to varying thicknesses of till and the need for manual...
Publication: CIM Bulletin
Auteur(s): D. MURRAY, R. WEBBER, E. LAROCQUE
Mots clés: Reclamation, Vegetation, Tailings, Soils, Elliot Lake, Uranium, Denison Mines Ltd., Williams Lake, Environmental control.
Numéro: 803
Volume: 72
Année: 1979
Texte
Sommaire: Any man-made structure will eventually decay, but we are basically concerned with the prevention of corrosion within a fairly limited time span. How corrosion can be minimized by design, the removal of oxides and a careful choice of paint systems is discussed, and mention is made of the electrical nature of most anticorrosive systems. Also discussed are the characteristics of certain paint binders and how mechanical properties will differ for various environments. Corrosion of a substrate by...
Publication: CIM Bulletin
Auteur(s): L D. ECCLESTON
Mots clés: Coatings, Protective coatings, Maintenance, Corrosion, Paints, Steelwork, Primers, Alkyds, Urethanes, Silicates, Epoxy resins, Polymers.
Numéro: 803
Volume: 72
Année: 1979
Texte
Sommaire: Samples of feed and product from a closed grinding circuit treating a heterogeneous lead-zinc ore were taken. The feed was subjected to laboratory batch grinding in a rod and ball mill with the objective of simulating the closed-circuit size distribution. It was concluded that the batch rod mill can closely simulate this product if only the over-all size is considered, but mineral-by-mineral large differences occur. If, as is suspected, the mineral sizes are the important factor in flotation,...
Publication: CIM Bulletin
Auteur(s): J. A. FINCH, R. KITCHING, K. S. ROBERTSON
Mots clés: Simulation, Grinding, Closed-circuit grinding, Mineral processing, Lead-zinc ores, Rod mills, Ball mills, Flotation.
Numéro: 803
Volume: 72
Année: 1979
Texte
Sommaire: The first step in achieving a rationalization of Canada's crazy patch-work quilt of mining taxes and policies was achieved with the release last November of a major federal-provincial report on the taxation of the Canadian mining industry. The Report, prepared by a group of federal and provincial civil servants, sets out a concise and informative discussion of the major taxation and incentive issues facing the mining industry, and puts forward major recommendations for more rational and...
Publication: CIM Bulletin
Auteur(s): R. D. BROWN
Numéro: 803
Volume: 72
Année: 1979
Texte
Sommaire: More than a decade ago, CANMET management recognized the need to make better use of existing technological information in mining and extractive metallurgy—two fields basic to the economic well-being of Canada. There were at that time no indexes or files dedicated to disseminating technical information for the many minerals mined and processed in Canada, including coal. CANMET, with the nation's largest research and library resources in the minerals field, was in a unique position to...
Publication: CIM Bulletin
Auteur(s): A. S. ROMANIUK, R. J. C. MacDONALD
Mots clés: Information, Mining, Mineral processing, Extractive metallurgy, CANMET, Indexing, Retrieval, Data processing, Computers.
Numéro: 803
Volume: 72
Année: 1979
Activé par Coveo Enterprise Search