Fire protection for mine surface coal handling systems

Abstract 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 coal mines which had been in operation for a number of years and experience gained at these operations was utilized in determining the level and extent of fire protection for the new mines.
This paper summarizes the major problems, and suggests some of the methods of solution, in providing an adequate degree of fire protection for surface coal handling systems. It will also discuss the potential for gas and dust explosions together with ways to minimize this potential.
Keywords: Safety, Coal handling systems, Fire protection, Fire detection.
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Summary: 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
Author(s): J.E. NESSET
Keywords: Mineral processing, Flotation, Residence time distribution.
Issue: 920
Volume: 81
Year: 1988
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Summary: 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
Author(s): A. GOURLIE
Keywords: Metallurgy, Corrosion, Casting grades, Sour service.
Issue: 920
Volume: 81
Year: 1988
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Summary: With the ever-increasing flood of new science and technology has come a new approach to design. The combination of these factors has produced an ever-accelerating pace of materials substitutions.
Examples to illustrate the points made above will be given. An overview of the current new materials fields will follow. Finally, the particular nature of the challenge for Canada will be discussed.
Publication: CIM Bulletin
Author(s): J.P. McGEER
Keywords: Mineral economics, Materials engineering, Resources.
Issue: 920
Volume: 81
Year: 1988
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Summary: 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
Author(s): G.A. KOSICK, L.A. KUEHN, M. FREBERG
Keywords: Mineral processing, Flotation, Galena, Polaris Concentrator.
Issue: 920
Volume: 81
Year: 1988
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Summary: 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
Author(s): T.P. RIORDON
Keywords: Mine safety, United Keno Hill Mines Limited
Issue: 920
Volume: 81
Year: 1988
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Summary: 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
Author(s): G. LABONTE, J.A. FINCH
Keywords: Mineral processing, Flotation systems, Electrochemical measurements.
Issue: 920
Volume: 81
Year: 1988
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Summary: 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
Author(s): K. SZAFRON, R. BURTON, M. TANSEY
Keywords: Hydraulic equipment, Fire resistant fluids, Potash, Component performance, Equipment.
Issue: 920
Volume: 81
Year: 1988
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Summary: 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
Author(s): J.C. O'ROURKE
Keywords: Mineral processing, Milling, Leaching, Solvent extraction, Electrowinning, Copper extraction.
Issue: 920
Volume: 81
Year: 1988
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