Towards AG/SAG/ball mill on-line performance monitoring

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Sommaire: This paper deals with specifying and evaluating fans for mine ventilation projects. Topics such as fan and equipment design life, operating points, and the operating conditions are discussed. Over the anticipated life of a mine’s ventilation system, the operating requirements will invariably change. Operating duties that define the range of the ventilation requirements need to be established. Apart from achieving planned operating pressure and volume range, consideration should be given to...
Publication: CIM Bulletin
Auteur(s): J.S. Stachulak, K.A. Mackinnon
Numéro: 1084
Volume: 97
Année: 2004
Texte
Sommaire: Gondwana coal deposits are widespread and are known to occur on four continents. Gondwana is the southern super continent that resulted from the breakup of the super continent Pangea during Late Carboniferous to Early Permian time. Gondwana was separated from the northern continent Laurasia by an equatorial sea, the Tethys. Gondwana coals are present in South America, Africa, India, and Australia. Laurasian coals occur in the United States, Canada, Russia, and Europe where they constitute the...
Publication: CIM Bulletin
Auteur(s): P.A. Hacquebard, M.P. Avery
Numéro: 1084
Volume: 97
Année: 2004
Texte
Sommaire: Minera Penmont’s La Herradura, which began in July 1998, is a joint venture between Industrias Peñoles, S.A. de C.V. and Newmont Mining Corporation. The mine is located in the northern Mexican state of Sonora. La Herradura consists of an open pit mine with a two-stage crushing plant and a heap leaching facility. Gold is recovered from the pregnant solution using the Merrill-Crowe process. La Herradura produces about 130 000 oz gold per year and its treatment capacity is approximately 22 000...
Publication: CIM Bulletin
Auteur(s): S. Cossio, J.-L. Noyola, P. González, R. Espinosa
Numéro: 1084
Volume: 97
Année: 2004
Texte
Sommaire: A number of fluidized bed applications in nickel extraction have been developed for commercial use. Five important processes have gained particular acceptance, namely, sulphide ore roasting, nickel sulphide (matte) roasting, nickel oxide reduction, laterite ore pre-reduction, and nickel chloride pyrohydrolysis. These applications all benefit from the fast reaction kinetics, high heat and mass transfer rates, and the excellent controllability of fluidized bed reactors. This paper examines the...
Publication: CIM Bulletin
Auteur(s): K. Adham, C. Lee
Numéro: 1084
Volume: 97
Année: 2004
Texte
Sommaire: Mill tailings with a potential to generate acid mine drainage should be properly disposed of to avoid environmental problems. Acid may be produced in a tailings site through reactions such as the following:
2FeS2 + 71/2 O2 + H2O Æ Fe2(SO4)3 + H2SO4
Fe2(SO4)3 + 6H2O Æ 2Fe(OH)3 + 3H2SO4
Although bacterial activity is known to promote the process, the principal requirement for these reactions to occur is the exposure of the sulphide mineral to oxygen and moisture. Thus, the placement of an inert...
Publication: CIM Bulletin
Auteur(s): T. Yalcin, M. Papadakis, N. Hmidi, B. Hilscher
Numéro: 1084
Volume: 97
Année: 2004
Texte
Sommaire: Borehole seismic field tests were conducted over two sub-economic massive sulphide deposits located in Norman West, Ontario, and Halfmile Lake, New Brunswick, to assess the usefulness of this technique for the exploration of base metal deposits. The field tests were conducted by the Downhole Seismic Imaging (DSI) consortium, a consortium initiated by the Geological Survey of Canada, Canadian mining and services companies (Falconbridge, Inco, Quantec Geoscience, and Noranda), and universities...
Publication: CIM Bulletin
Auteur(s): G. Bellefleur, C. Müller, D. Snyder, G. Perron, E. Adam, K. Stevens, L. Matthews
Numéro: 1084
Volume: 97
Année: 2004
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