Factors influencing the selection of mine hoist electrical drives

Abstract Many of the ore bodies presently being developed are in remote locations and are, or will be, served by electrical power supply systems of limited capacity.The largest single components of the electrical systems of an underground mine are usually the production hoist drives; the power demands of these drives vary continuously throughout each hoisting cycle.
Before 1970 mine hoists were driven by either wound rotor induction motors or DC motors in conjunction with motor-generator sets.Static Power conversion equipment now costs less to purchase and install and is claimed to be more efficient than motor generator sets. On the debit side, however, it can adversely affect the hoist motors, it operates at relatively low power factors, and it produces harmonic currents.
This paper discusses the effects of static equipment on both DC motors and AC power systems, and evaluates the relative consumption of the three classes of drives.
Keywords: Equipment, Hoisting systems, Electrical drives.
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Publication: CIM Bulletin
Author(s): P.M. Tiley, W.G. Spencer, E. Sulis
Keywords: Equipment, Hoisting systems, Dome Mine.
Issue: 974
Volume: 86
Year: 1993
Text
Publication: CIM Bulletin
Author(s): A. Zaidi, S. Kumar
Keywords: Natural gas, Technology, Cogeneration systems, Energy efficiency, NOX emissions.
Issue: 974
Volume: 86
Year: 1993
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Summary: This article addresses the relationship between mine evaluation, the tax system, and economic risk. It is based on a paper presented by the author at recent seminars in Moscow and Tashkent on the subject of mine evaluation.
Publication: CIM Bulletin
Author(s): Robert B. Parsons
Issue: 974
Volume: 86
Year: 1993
Text
Summary: Loading and transportation are important activities of the mining process. Automation of these activities in underground hard rock mining has been discussed for a long time. This paper deals with the performance evaluation of a prototype automatic Load-Haul-Dump (LHD) vehicle (a 7-ton GHH LF LHD model) operating in Zinkgruvan mine, Sweden. The purpose of the data analysis is to evaluate the operational and maintenance characteristics of the automatic LHD system in the mine. Graphical and...
Publication: CIM Bulletin
Author(s): D. Kumar, Nick Vagenas
Keywords: Underground mining, Equipment evaluation, Automatic LHD systems.
Issue: 974
Volume: 86
Year: 1993
Text
Summary: At Dofasco's No. 4 furnace a variation of the basic oxygen steel-making process, Klockner Oxygen Bottom Maxhutte (K-OBM), is used to produce steel. Large amounts of hot gases and paniculate are evolved during the oxygen blowing phase. A quencher and a venturi scrubber are used to collect over 99.5 % of the paniculate. In 1990, the authors investigated the effect of foamy slag on the paniculate emissions from the furnace. The amount of lime added early in the oxygen blowing cycle was reduced,...
Publication: CIM Bulletin
Author(s): E. Cocchiarella
Keywords: Basic oxygen processes, Foamy slag, Particulates, Fume suppression, Waste BOF oxides.
Issue: 974
Volume: 86
Year: 1993
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