The development of low cost 12% chromium steels for European bulk solids handling industries

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Publication: CIM Bulletin
Auteur(s): Veronique Falmagne
Numéro: 955
Volume: 84
Année: 1991
Texte
Sommaire: This paper reviews the development of new designs in extensible and high angle conveyor systems. These aim to overcome the limitations of prior alternative concepts in design. The application of such systems in strip, terrace, open pit and mountain mining is reviewed.
Publication: CIM Bulletin
Auteur(s): A. Richmond, T. Atkinson, M. Scoble
Numéro: 955
Volume: 84
Année: 1991
Texte
Sommaire: The Williams Mine is Canada's largest gold producer, with annual production of some 500 000 ounces of gold from two million tonnes of ore. Highly mechanized and automated underground mining practices are utilized at the property in order to help achieve high levels of productivity and the most cost-effective mining possible.
Planning and design parameters for the underground ore handling system at the Williams Mine are described in this paper. Particular reference is made to the consideration...
Publication: CIM Bulletin
Auteur(s): Henry Smith, Stu Brown
Numéro: 955
Volume: 84
Année: 1991
Texte
Sommaire: Exploration and development of mineral resources in developing countries by Canadian-based multinational mining companies is becoming increasingly common. One problem being encountered is that the objectives of the governments of developing countries can differ from those of developed countries. These objectives are not always consistent with maximizing returns from the projects, which can create conflicts between the mining company's responsibility to its shareholders and the desire to be a...
Publication: CIM Bulletin
Auteur(s): Robert B. Parsons
Numéro: 955
Volume: 84
Année: 1991
Texte
Sommaire: Minnova Inc. has five operating divisions thoughout Canada. One of them is Lac Dufault which was established in 1964.
Lac Dufault is located 15 km north of Rouyn-Noranda, in what is known as Noranda volcanic centre, in northwestern Quebec. For more than 25 years, Lac Dufault has produced copper, zinc, gold and silver from four different mines: Norbec, Mitten-bach, Corbet and now Ansil.
Ansil, officially in production since July 1989, is one of the deepest mines presently in production in...
Publication: CIM Bulletin
Auteur(s): J. Desrosiers
Numéro: 955
Volume: 84
Année: 1991
Texte
Sommaire: Comme l'exploitation d'un gisement a grande profondeur represente un defl de faille et que la profondeur a laquelle se situe celui d'Ansil varie de 1200 m a 1460 m, nous avons du mettre en place une infrastructure de surface d'envergure incluant un treuil de production et un chevalement d'une tres grande capacite. De meme, I'infrastructure sous terre a eteproposee en tenant compte de cefait important; d'ailleurs, I'excavation de deuxpuits circu-laires dont I'un est en beton et acier et...
Publication: CIM Bulletin
Auteur(s): Richard Samson
Numéro: 955
Volume: 84
Année: 1991
Texte
Sommaire: This paper compares the behaviour of gold and ore in the grinding circuit of Hemlo Mines Ltd. Particular attention is given to grinding kinetics, classification behaviour, and liberation. For grinding kinetics, laboratory grinding of gold flakes and silica, 840 \im to 1200 \an in size (14/20 mesh), was also performed to provide a standard for comparison and to study in a controlled environment the mechanisms of breakage, folding, smearing and impacting.
Grinding kinetics were characterized at...
Publication: CIM Bulletin
Auteur(s): S. Banisi, A.R. Laplante, J. Marois
Numéro: 955
Volume: 84
Année: 1991
Texte
Sommaire: Epithermal Zn-Pb-Cu-Ag-Au quartz-carbonate-barite veins at the Silver Queen mine near Owen Lake, west-central British Columbia, are hosted by Late Cretaceous Tip Top Hill andesitic volcanic rocks. The veins form a rectilinear northwest-northeast pattern that differs slightly from regional structural trends. The main northwest-trending veins are oriented very close to the trend of regional northwest faults, but the crossing veins tend to be more east-northeasterly (070 degrees) compared to a...
Publication: CIM Bulletin
Auteur(s): C.H.B. Leitch, H.L. Cheng, C.T. Hood, A.J. Sinclair
Numéro: 955
Volume: 84
Année: 1991
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