Diagnostic Studies of Lubricants

Abstract The mechanics of formation of wear-metal suspensions in lubricants is discussed, along with the relationship of the concentration of the metals and other particles to the wear of lubricated machinery parts. The importance of particle and suspension analysis of used lubricants in a preventative maintenance program is stressed, in particular with regard to mobile equipment in a mining operation.
Keywords: Lubricants, Mechanical-electrical, Wear-metal suspensions, Machinery, Equipment, Maintenance, Abrasion.
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Summary: The over-all slope angle of between 55 and 60 degrees at the Adams Mine necessitates control blasting on the final pit walls. The control blasting techniques used are pre-shearing and buffer blasting. Pre-shearing with 21/2-inch holes on 5-foot centers is used in areas where jointing and rock type are not conducive to smooth stable walls. Buffer blasting with 121/4-inch holes is used in areas where the rock is competent. Control blasting adds to the operating costs, but can result in...
Publication: CIM Bulletin
Author(s): Barry J. Morash
Keywords: Rock mechanics, Control blasting, Slope stability, Adams Mine, Pre-shearing, Buffer blasting.
Issue: 793
Volume: 71
Year: 1978
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Summary: Several commercial polyacrylamide flocculants most widely used in Western Canadian mineral processing plants have been analyzed chemically and compared in standardized settling tests as aids to thickening and clarification. Data are included for both dry and liquid-type flocculants. Percentages of active ingredients in these commercial products varied widely. Performances were compared on the basis of: equal additions of active ingredients, nearly equal molecular weights and nearly equal...
Publication: CIM Bulletin
Author(s): D. W. Rogers, G. W. Poling
Keywords: Metallurgy, Polyacrylamides, Flocculants, Silcosil, Polymers, Settling tests, Mineral processing.
Issue: 793
Volume: 71
Year: 1978
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Summary: Proper calibration of portable gamma-ray spectrometers and Spectrometric logging equipment is essential if they are to be used for accurate quantitative determinations of radio element concentrations. In the case of both types of equipment, it is necessary to determine the system calibration constants (stripping factors and sensitivities). In the case of borehole logging equipment, it is further necessary to determine the system response characteristics if the data are to be computer...
Publication: CIM Bulletin
Author(s): P. G. Killeen, J. G. Conaway
Keywords: Exploration, Geophysical exploration, Calibration, Spectrometric logging, Gamma-ray spectrometry, Radio elements, Logging, Borehole logging.
Issue: 793
Volume: 71
Year: 1978
Text
Summary: In the past, conventional reflection seismic techniques were not very successful when applied to typical mining exploration: they lacked resolution in the shallow range or were not cost effective.
By combining a light earth tamper source, special geophones and field procedures, a stacking process of the returning seismic events using a microprocessor system, and a sophisticated sequence of adapted digital data processing, Mini-Sosie achieves high resolution in the 100-ft to 4000-ft range....
Publication: CIM Bulletin
Author(s): Y. Serres, C. Wiles
Keywords: Exploration techniques, Geophysical exploration, Seismic exploration, Mini-Sosie, Prospecting, Data processing.
Issue: 793
Volume: 71
Year: 1978
Text
Summary: Several thousand parts per billion of uranium are present in some alkaline lake and ground waters of the Okanagan region, British Columbia. To a major extent, the uranium content of these highly anomalous waters is controlled by their levels of dissolved bicarbonate. In lakes, dissolved bicarbonate and the organic content of the sediment largely control the partitioning of uranium between sediment and water. This relationship is found to a lesser extent in alkaline creeks, and transported...
Publication: CIM Bulletin
Author(s): R. R. Culbert, D. G. Leighton
Keywords: Exploration, Geochemical exploration, Uranium exploration, Alkaline waters, Okanagan area, Bicarbonate analyses, Lake waters, Stream waters, Soil geochemistry, Secondary deposits.
Issue: 793
Volume: 71
Year: 1978
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Summary: The original analogue instrumentation at Lornex Mining Corporation to optimize the throughput by controlling the power drawn by the semi-autogenous mills was found to be inadequate because of the frequent changes in ore type. Although the trunnion bearing pressure of the mill was a crucial control criterion, it was not utilized in the original control scheme. After several plant tests of different types of analogue controllers were unsuccessful in finding any control equipment suitable for...
Publication: CIM Bulletin
Author(s): James McManus, Allan R. Paul, Frank Yu
Keywords: Metallurgy, Process control, Lornex, Grinding, Semi-autogenous grinding, Instrumentation, Automation, Computers, IMPAC, Supervisory programs.
Issue: 793
Volume: 71
Year: 1978
Text
Summary: DISCODAT is a system of computer programs written for CANMET, Canadian Department of Energy, Mines and resources, to be used in analyzing geological data for rock slope design. The programs were written in Fortran IV for an IBM 360/67 computer.
A program conditions field data from field forms for storage in a line file. Data may be selectively retrieved from the line file by a general retrieval program which uses a variety of relational operators. The retrieved data may be displayed as...
Publication: CIM Bulletin
Author(s): D. Cruden
Keywords: Rock mechanics, Pit slopes, Open-pit mining, Geological data, DISCO-DAT, Computer programs, Data processing, Slope stability.
Issue: 793
Volume: 71
Year: 1978
Text
Summary: "When elephants fight, it's the grass that gets trampled".
It is becoming increasingly evident that the federal and provincial governments are awakening to the fact that their vigorous scramble for a "fair share" of mineral revenues which kicked off in 1974 has done considerable harm to the Canadian mining industry. Recent public statements made by government officials, particularly at the recently held annual convention of the Prospectors and Developers Association, would indicate that there...
Publication: CIM Bulletin
Author(s): R. D. Brown
Issue: 793
Volume: 71
Year: 1978
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Summary: A new technique for the determination of trace levels of uranium in solution has been developed. A compact laser emits short, but intense, ultraviolet pulses to excite the green fluorescence of a uranyl-complex formed by the addition of a proprietary reagent to the sample. Organic species present in most natural waters also fluoresce quite intensely, but their emission does not last appreciably longer than the excitation pulse, in contrast to the relatively long persistence of the uranyl...
Publication: CIM Bulletin
Author(s): John C. Bobbins
Keywords: Exploration, Geochemical exploration, Uranium exploration, Fluorescence, Laser fluorescence, Surface waters, Ground waters.
Issue: 793
Volume: 71
Year: 1978
Text
Summary: Dans le but de voir si une region comme la Gaspesie, qui a subi la der-niere glaciation, se prete avantageuse-ment a la methode de prospection allu-vionnaire, environ 800 concentres de mineraux lourds furent preleves dans les districts electoraux de Matane et de Gaspe-Nord.
Les differentes phases minerales pre-sentes dans les concentres ont ete examinees a la loupe binoculaire. Afin de mieux valoriser ce type d'informa-tion, nous avons ete amenes a experimenter et a mettre en oeuvre des...
Publication: CIM Bulletin
Author(s): Robert L. Tremblay
Keywords: Exploration, Prospection alluvionnaire, Gaspesie, Mineraux lourds, Traitement des donnees, Sediments de ruisseau, Geochimie, Metallogenie.
Issue: 793
Volume: 71
Year: 1978
Text
Summary: It is generally recognized that the interpretation of bedrock geochemical data in volcanic terrains can be improved by adjusting for rock-type. Various chemical attributes of volcanic rocks have been put forward in the literature as rapid indicators of rock-type, but there is some question as to which of these is the most reliable. Only one such attribute, total iron, seems to have seen systematic use in geochemical mapping in the Flin Flon region.
Discriminant analysis of 500 basalts,...
Publication: CIM Bulletin
Author(s): J. S. Fox
Keywords: Exploration, Geochemical exploration, Drill-hole geochemistry, Trace metals, Rock-type correction, Factor analysis, Trend analysis, Silica normalization, Volcanic rocks, Hanson Lake mine.
Issue: 793
Volume: 71
Year: 1978
Text
Summary: Weighted moving-average contour maps have been constructed for molybdenum, copper and zinc using 7850 stream-sediment samples from 5430 square miles (14,063 sq. kms) of south-central British Columbia.
Regional trends for molybdenum and zinc are northeast, north and northwest and those for copper are north and northwest. These trends are interrupted by zones markedly low in metals. The metal-rich trends cross rocks of different lithology and age and thus appear to be structurally controlled.
T...
Publication: CIM Bulletin
Author(s): R. H. Wallis, J. J. Brummer
Keywords: Exploration, Geochemical exploration, Stream-sediment geochemistry, British Columbia, Moving-average techniques, Molybdenum, Copper, Zinc, Metal distribution, Mineralization.
Issue: 793
Volume: 71
Year: 1978
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