Simultaneous measurement of mine worker exposure to respirable silica and diesel exhaust participates

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Sommaire: Soft-sensors are a computer software alternative to Inadequate hardware instrumentation. Filters are averaging methods that reduce the noise in any sensor's signal. This paper introduces these topics and places them in a mineral processing context using the n-product formula.
Publication: CIM Bulletin
Auteur(s): R. Spring
Numéro: 965
Volume: 85
Année: 1992
Texte
Sommaire: A water well represents not only a significant investment but also is a key to making a living or sustaining a reasonable lifestyle. This naturally makes the water well a precious possession that needs to be protected.
This paper describes the challenges that TransAlta Utilities Corporation faced and how it responded to the concern of residents that open pit coal mining would affect their water well supplies.
Publication: CIM Bulletin
Auteur(s): Andrew Hickinbotham
Numéro: 965
Volume: 85
Année: 1992
Texte
Sommaire: The mining industry is adjusting its sights to take a shot at the rising level of non-profit taxes which threaten to handicap the industry's competitive advantage. In the case of this particular expedition, the industry evidentally has a strong ally — the country's mines ministers. It appears that an initiative is under way to assess the impact of non-profit taxes on mining in Canada as compared to other mining nations.
Publication: CIM Bulletin
Auteur(s): Robert B. Parsons
Numéro: 965
Volume: 85
Année: 1992
Texte
Sommaire: While time and again many authors have categorically stressed the restoration of the environment, very little effort has been made in the mineral industry to develop the economy of environmental control. There are many abatement procedures that search a maze of variants. Among them pricing environmental damage seems to be more logical and easily implementable.
Publication: CIM Bulletin
Auteur(s): S.K. Mukhopadhyay, S.K. Pal, J. Bhattacharya
Numéro: 965
Volume: 85
Année: 1992
Texte
Sommaire: The raw ores which are processed in mineral processing plants exhibit very strong variations of their physical and chemical properties. As a consequence, the performances of the comminution and separation processes vary greatly from time to time. Model-based control strategies improve the performance of the plant; however, they require some form of adaptation to cope with the variations of the ore properties.
This paper deals with the use of adaptive techniques for the control of mineral...
Publication: CIM Bulletin
Auteur(s): D. Hodouin, K. Najim
Numéro: 965
Volume: 85
Année: 1992
Texte
Sommaire: The early history of the Geological Survey of Canada is closely connected with coal geology investigations in the Atlantic Provinces.
In 1843, Sir William Logon, the first director of the Geological Survey, measured the 4441 m thick shore section at Joggins in Nova Scotia. Detailed mapping of the coalfields were subsequently carried out by H. Fletcher during the latter part of the nineteenth and first part of the present century. During the 1920-1940 period, the stratigraphy of the carbonifer...
Publication: CIM Bulletin
Auteur(s): Peter A. Hacquebard
Numéro: 965
Volume: 85
Année: 1992
Texte
Sommaire: Canadian copper, nickel, zinc, lead and molybdenum mines are characterized by the mining of ores from which more than one metal is recovered. During the 1980s, approximately 15% of the gold, 25% of the zinc, 30% of the copper, 55% of the molybdenum, 80% of the silver and 90% of the lead produced from Canadian mines were produced as co-products and by-products of base metal mining operations. This trend is not expected to change significantly in the near future. The presence of co-products and...
Publication: CIM Bulletin
Auteur(s): L.S. Jen
Numéro: 965
Volume: 85
Année: 1992
Texte
Sommaire: This paper is based on data generated between October, 1986 and October, 1989, during the implementation of an Ecological Engineering close-out for a zinc mine in Northern Ontario, where 690 000 tonnes of tailings contain 41.1% pyrite and 4.1% pyr-rhotite. The objective was to determine rates of sulphide oxidation and iron precipitation in the tailings. Those rates are relevant for the assessment of the long-term effectiveness of biological systems employed in the removal of heavy metals from...
Publication: CIM Bulletin
Auteur(s): M. Kalin, R.O. van Everdingen, R.G.L. McCready
Numéro: 965
Volume: 85
Année: 1992
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