The challenge of new materials

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Mots clés : Mineral economics;Materials engineering
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Sommaire: This paper discusses the importance of considering residence time distribution (RTD) in the design of flotation and mixing circuits and in the analysis of operating problems. The experiences and successes of Brunswick Mining in this area are covered and include: the development of a practical RTD measurement technique using pulp conductivity, baffle installation to improve the RTD of existing process equipment, and the method in which RTD considerations have been used to design the newest...
Publication: CIM Bulletin
Auteur(s): J.E. NESSET
Mots clés: Mineral processing, Flotation, Residence time distribution.
Numéro: 920
Volume: 81
Année: 1988
Texte
Sommaire: This paper describes the performance properties of a new 95 ksi minimum yield strength, oil well casing grade designed specifically to resist hydrogen sulphide stress corrosion cracking, SSCC. The new grade, Soo-95SS, demonstrates NACE Tensile threshold values greater than 90% specified minimum yield strength, SMYS, and NACE Bent Beam values in excess of 12.7 x 104 psi. The new Soo-95SS grade also exhibits superior collapse and notch toughness values.
Publication: CIM Bulletin
Auteur(s): A. GOURLIE
Mots clés: Metallurgy, Corrosion, Casting grades, Sour service.
Numéro: 920
Volume: 81
Année: 1988
Texte
Sommaire: Highly variable and higher than forecast lead mill feed grades were problems experienced at the Polaris Concentrator. Limited flotation capacity and poor operating flexibility prevented the plant operators from overcoming these difficulties, and resulted in grades and recoveries which were lower than necessary.
Two column cells were integrated into the lead circuit in an effort to give the operators the tools they required to achieve the best grades and recoveries possible, regardless of the...
Publication: CIM Bulletin
Auteur(s): G.A. KOSICK, L.A. KUEHN, M. FREBERG
Mots clés: Mineral processing, Flotation, Galena, Polaris Concentrator.
Numéro: 920
Volume: 81
Année: 1988
Texte
Sommaire: Major swings in the silver price since 1979, along with the ever constant fight to maintain ore reserves has forced United Keno Hill Mines Limited through several unique series of events in order to survive in the 80s.
This paper is specifically meant to be a description of safety and productivity improvements achieved to ensure the survival of a silver mining community in the Yukon. There are, however, other events and conditions that must be described to complete the story and this paper...
Publication: CIM Bulletin
Auteur(s): T.P. RIORDON
Mots clés: Mine safety, United Keno Hill Mines Limited
Numéro: 920
Volume: 81
Année: 1988
Texte
Sommaire: A long-standing objective has been to obtain interpretable measurements of the oxidation-reduction potential in mineral slurries. For this purpose several sensing electrodes (black platinum wire, platinum foil and spiral, gold foil and spiral, and sulphide minerals such as chalcopyrite and galena) were investigated to determine their response to the presence of sulphide minerals in the pulp, and to the addition of reagents commonly used in flotation. The observed discrepancies between the...
Publication: CIM Bulletin
Auteur(s): G. LABONTE, J.A. FINCH
Mots clés: Mineral processing, Flotation systems, Electrochemical measurements.
Numéro: 920
Volume: 81
Année: 1988
Texte
Sommaire: Conversion of hydraulic equipment to fire resistant fluids has been hampered by less than satisfactory component performance and in some cases, catastrophic equipment failure. Concern over identifying possible causes to these problems led to a joint research project between the Potash Corporation of Saskatchewan Mining Limited and the University of Saskatchewan. This paper summarizes some of the results and conclusions derived from this joint project. In this study, the research was limited...
Publication: CIM Bulletin
Auteur(s): K. SZAFRON, R. BURTON, M. TANSEY
Mots clés: Hydraulic equipment, Fire resistant fluids, Potash, Component performance, Equipment.
Numéro: 920
Volume: 81
Année: 1988
Texte
Sommaire: Gibraltar Mines Ltd. has been operating its open pit copper mine for fifteen years. In that time, over 140 million tons of waste and low-grade material has been placed on the mine waste dumps. Laboratory and in situ testing indicated that enough teachable copper was recoverable from the dumps to justify a leaching operation which would include the construction of a solvent extraction-electrowinning plant. The plant, which was commissioned in October 1986, was designed to process 3000 USGPM of...
Publication: CIM Bulletin
Auteur(s): J.C. O'ROURKE
Mots clés: Mineral processing, Milling, Leaching, Solvent extraction, Electrowinning, Copper extraction.
Numéro: 920
Volume: 81
Année: 1988
Texte
Sommaire: During the early part of the 1980s, four new surface coal mines commenced operation in the Province of British Columbia. Each represented a major investment in both persons and materials. In order to protect this investment in one significant area—the fixed portion of the surface coal handling system—a substantial amount of work was undertaken to ensure that the system was well protected from an outbreak of fire. A great deal of effort in this field had already been made by those...
Publication: CIM Bulletin
Auteur(s): T.G. CARTER
Mots clés: Safety, Coal handling systems, Fire protection, Fire detection.
Numéro: 920
Volume: 81
Année: 1988
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