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  • 1.
    Addie, Graeme R.
    et al.
    GIW Industries Inc..
    Roudnev, Aleksander S.
    Weir Minerals North America.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    The new ANSI/HI centrifugal slurry pump standard2007In: Journal of the South African Institute of Mining and Metallurgy, ISSN 0038-223X, Vol. 107, no 6, p. 403-409Article in journal (Refereed)
    Abstract [en]

    The Hydraulic Institute has completed the task of developing a new ANSI/HI standard 12.1-12.6 (2005) for Rotodynamic (Centrifugal) Slurry Pumps covering nomenclature, definitions, applications, and operation. The standard provides examples of the different slurry pump types and contains an extensive section on pump and slurry definitions. The effect of slurry on pump performance is covered along with the pumping of froth. Reference is also made to ANSI/HI standard 9.6.7 (2004), which contains a new method for pump performance correction when handling viscous fluids.Classification of slurry services is established and then is used to determine limitations on velocities and total head per pump in order to obtain acceptable wear performance. The new service class, head per stage and other limits are directly related to capital and other cost considerations that will affect solids transport system economics. The writers review the contents of the new standard, highlight the main points, and discuss the reason for the slurry classification, corresponding limits and expected implications, particularly with respect to operating costs of the pumps in solids transport systems.

  • 2.
    Ericsson, Magnus
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Social Sciences.
    Mineral supply from Africa: China's investment inroads into the African mineral resource sector2011In: Journal of the South African Institute of Mining and Metallurgy, ISSN 0038-223X, Vol. 111, no 7, p. 497-500Article in journal (Refereed)
    Abstract [en]

    The implications of the lack of natural resources in China and its implications globally and in Africa in particular are presented. China has quickly become a major producer of many metals and minerals. The country also has a near-monopoly on rare earths, tungsten, and other metals. The specific geological parameters of China, with few high-grade deposits of substance, have to a large extent determined the structure of the Chinese iron ore industry, where small and medium-size mines account for most of the production. The depletion of deposits and declining competitiveness has resulted in a growing share for the larger mines. The average grade of Chinese production is likely to be considerably lower than the 30% often assumed, and the production grade in its major mines is less than 25%. Most major and medium-sized mines are owned and operated by the major steel companies, most of which are state-owned with only a few of the major or medium mines being independent

  • 3.
    Gustafson, Anna
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Schunnesson, Håkan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Paraszczak, Jacek
    Université Laval.
    Shekhar, Gurmeet
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    BErgström, Stefan
    LKAB.
    Brännman, Pär
    LKAB.
    Operator influence on the loading process at LKAB's Iron ore mines2020In: Journal of the South African Institute of Mining and Metallurgy, ISSN 0038-223X, Vol. 120, no 3, p. 191-202Article in journal (Refereed)
  • 4.
    Mutemererwa, Anderson
    et al.
    Luleå tekniska universitet.
    Ericsson, Magnus
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Social Sciences.
    Vertical integration as a source of competitiveness: the case of ferrochromium in southern Africa2000In: Journal of the South African Institute of Mining and Metallurgy, ISSN 0038-223X, Vol. 100, no 4, p. 259-264Article in journal (Refereed)
    Abstract [en]

    This paper investigates the role of vertical integration between chrome ore mines and ferrochromium smelters in the location of ferrochromium production capacity in South Africa and zimbabwe. Vertical integrations important in understanding the increasing competitive position of these two countries as observations show that an increasingly larger share of the global market has been coming from integrated producers. The paper argues that the increased vertical integration between mines and smelters in South Africa and Zimbabwe has led to a lower cost of chrome ore as an input compared with other producers. Underlying this hypothesis is the basic tenet that, more likely than not, production will take place where the costs are lowest. The paper concentrates on high carbon ferrochromium (HCFC) production in market economy countries (MEC). Using an ordinary least squares model, the study tests the relationship between low chrome ore costs and vertical integration shows a statistically significant relationship, These findings partially support the view that the control of sources of chrome ore is a major source of competitiveness.

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