Computer Power Demand Control

Cette publication n'est pas offerte dans votre langue; certains de ses renseignements ont été préremplis pour la version française.
Mots clés : Electricity;Computers;Instrumentation;Control processes;Demand controllers
Accés complet à Document technique
Version PDF pour 20,00 $
Recherche
Trier par :  Pertinence
Affichage des résultats 1 - 9
Texte
Sommaire: This paper reviews the physical properties that make low-density polyethylene the most practical and economical material for launder fabrication in the majority of mine and mill applications. The basic design features and use of other launder materials are also discussed.
Publication: CIM Bulletin
Auteur(s): M. A. Keogh
Mots clés: Plastics, Launders, Mineral processing, Polyethylene, Flotation.
Numéro: 774
Volume: 69
Année: 1976
Texte
Sommaire: Energy requirements for various pelletizing systems are considered from a fuel and power aspect, with the presentation of typical energy heat balance flow sheets. A partial calculation for the firing zone of a straight grate system is shown and a comparison of an actual measured and a theoretical-calculated heat balance for a grate-kiln is presented. The power used for each pelletizing system and future possible energy savings are also reviewed.
Publication: CIM Bulletin
Auteur(s): Melvin J. Greaves, S. S. Sephton, Kirit C. Vyas
Mots clés: Iron ore, Energy, Pelletizing, Mineral processing, Fuel, Power, Heat balances, Shaft furnaces, Traveling grates, Grate-Kiln system.
Numéro: 774
Volume: 69
Année: 1976
Texte
Sommaire: This paper tells the story of a serious mine fire on a mechanized long-wall face in a submarine coal mine at Glace Bay, Nova Scotia. The story gives, in chronological order, a technical account of the steps taken to investigate, fight and contain the fire. The time during which the events took place spans from June 19 to November 7, 1975.
Publication: CIM Bulletin
Auteur(s): W. LeBlanc, J. Phalen
Mots clés: Coal mining, Mine safety, Glace Bay collieries, Devco, Underground fires, Fire fighting.
Numéro: 774
Volume: 69
Année: 1976
Texte
Sommaire: International trade in minerals plays a very important role in the economic growth of many nations. Several less developed countries are heavily dependent on their mineral exports for earning foreign exchange, which is needed for industrialization. Mineral exporting nations experience many problems in international mineral markets; the most important are tariff barriers, deteriorating terms of trade, instability in metal prices, etc. The formation of international mineral cartels to raise...
Publication: CIM Bulletin
Auteur(s): M. Sengupta
Numéro: 774
Volume: 69
Année: 1976
Texte
Sommaire: The Iron Ore Company of Canada constructed a beneficiation complex in Sept-Iles, Quebec, to concentrate and pelletize earthy red hematite iron ores from the Knob Lake area. The plants were scheduled for initial production during the first quarter of 1973.
Many problems have been experienced to date. Difficulties in controlling the process, excessive mechanical failures, design deficiencies and manpower-staffing problems have caused an extended start-up.
The problems are now essentially solved...
Publication: CIM Bulletin
Auteur(s): C. H. Sleeman
Mots clés: Iron Ore Company of Canada, Beneficiation, Sept-Iles, Concentrating, Pelletizing, Indurating, Balling.
Numéro: 774
Volume: 69
Année: 1976
Texte
Sommaire: A new solvent extraction process for the separation of cobalt, copper and zinc from nickel sulphate process streams has been developed. It involves selective extraction of these elements with a quaternary ammonium thiocyanate dissolved in an aromatic diluent. The chemical principles of this process have been investigated and are described, together with background physico-chemical data relating to the use of this solvent. Long-term, testing in a continuous "mini-plant" circuit gave high-purit...
Publication: CIM Bulletin
Auteur(s): C. E. O'Neill, V. A. Ettel, A. J. Oliver, I. J. Itzkovitch
Mots clés: Hydrometallurgy, Solvent extraction, Cobalt, Copper, Zinc, Nickel sulphates, Effluent treatment.
Numéro: 774
Volume: 69
Année: 1976
Texte
Sommaire: Because of the elements of uncertainty and instability associated with single-enterprise communities, there is increasing interest in the alternatives to developing additional new communities of this nature.
Gulf Minerals Canada Limited has chosen a unique alternative means to accommodate employees at a new uranium mine/mill complex at Rabbit Lake in Northern Saskatchewan. Gulf has adopted a fly-in program which moves their staff from a 450 mile radius, in and out of the on-site facilities,...
Publication: CIM Bulletin
Auteur(s): F. R. Nogas
Mots clés: Manpower, Rabbit Lake, Gulf Minerals Canada Limited, Transportation, Commuting.
Numéro: 774
Volume: 69
Année: 1976
Texte
Sommaire: Auriferous quartz veins occupy zones of dilation. Fold-generated dilation zones are systematically distributed and are dependent upon the folding mechanism. Comparison of natural and theoretical folds indicates that different mechanisms operated in the Halifax and Goldenville formations.
In the slates of the Halifax Formation, the folds are of similar type and internal strain is most intense in the limbs. This internal strain is probably accommodated with little or no dilation.
In the...
Publication: CIM Bulletin
Auteur(s): J. Duncan Keppie
Mots clés: Structural geology, Gold veins, Meguma Group, Vein mineralization, Halifax Formation, Goldenville Formation, Folding, Dilation zones, Curvature Index.
Numéro: 774
Volume: 69
Année: 1976
Texte
Sommaire: Bauxite has been the almost universal ore of aluminum for about 100 years, with most of the world's reserves occurring in the developing countries. As a result of fiscal and political activities prompted in part by the energy crisis, the formation of the IBA combined with increasing freight and labour costs, these reserves are no longer as competitive or as secure as they once were. This has given fresh impetus to the development of processes for alumina production that utilize raw material...
Publication: CIM Bulletin
Auteur(s): N. W. Bliss
Mots clés: Alumina, Anorthosite, Nepheline syenite, Phonolite, Clays, Shales, Coal rejects, Fly ash.
Numéro: 774
Volume: 69
Année: 1976
Activé par Coveo Enterprise Search