Browsing by UP Author "Cromarty, Robert Douglas"

Browsing by UP Author "Cromarty, Robert Douglas"

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  • Compatibility of graphite with primary platinum group metals industrial matte 
    Thethwayo, Bongephiwe Mpilonhle; Cromarty, Robert Douglas (Taylor & Francis, 2015-05)
    Wear resistance of synthetic graphite against liquid industrial platinum group metals furnace matte (Cu–Fe–Ni–S) was investigated from 800°C to 1450°C at a contact time of 1 hour. Graphite resistance was measured by the ...
  • Development of a method for evaluating raw materials for use in iron ore sinter in terms of lime assimilation 
    Ferreira, W.; Cromarty, Robert Douglas; De Villiers, Johan (Southern African Institute of Mining and Metallurgy, 2014-04)
    Steel is produced in a basic oxygen furnace from hot metal obtained from a blast furnace. A sintered iron ore with good hightemperature properties (strength and permeability) should be used as feed to the blast furnace. ...
  • Economic modelling of a ferrochrome furnace 
    Biermann, W.; Cromarty, Robert Douglas; Dawson, N.F. (Southern African Institute of Mining and Metallurgy, 2012-04)
    All industrial processes are economically driven, resulting in the ever increasing need for process optimization in order to stay competitive and profitable. Numerous models has been published depicting the optimization ...
  • Evaluation of coke resistivity for the manganese alloy market 
    Nhiwatiwa, Jonathan; Cromarty, Robert Douglas (MDPI, 2022-04)
    The submerged arc furnace (SAF) has become the equipment of choice to produce manganese ferro-alloy. Furnace operators aim to reduce the cost of production by better understanding the role played by the various raw materials ...
  • The fracture strength of TRISO-coated particles determined by compression testing between soft aluminium anvils 
    Van Rooyen, Gerrit T.; Du Preez, Rudy; De Villiers, Johan; Cromarty, Robert Douglas (Elsevier, 2010-08)
    Compression testing of tri-isotropic (TRISO) carbon/silicon carbide-coated fuel particles between anvil materials with a wide range of hardnesses was investigated. During compression testing, the particle produces a ...
  • Matte - tap-hole clay - refractory brick interaction in a PGM smelter 
    Du Toit, J.; Cromarty, Robert Douglas; Garbers-Craig, Andrie Mariana (Southern African Institute of Mining and Metallurgy, 2016-04)
    Penetration of matte into tap-hole bricks causes detrimental refractory wear, which can lead to furnace breakouts. The ability of the tap-hole clay to form a protective layer on the brick, thereby limiting matte ...
  • The precipitation of niobium carbide and its influence on the structure of ht250 for automobile wheel hubs 
    Zhou, Zhu-Hua; Song, Sheng-Qiang; Cromarty, Robert Douglas; Chen, Yi-Liang; Xue, Zheng-Liang (MDPI, 2021-10-15)
    Improving the strength of grey cast iron wheel hubs will improve the safety of automobiles and have a great significance for energy saving and environmental protection. This paper systematically compares the calculation ...
  • Simulation of the pressure drop across granulated mixtures using a coupled DEM – CFD model 
    Nyembwe, Mutombo Alainch; Cromarty, Robert Douglas; Garbers-Craig, Andrie Mariana (Elsevier, 2019-01)
    The sinter process converts mixtures of iron ore, iron ore fines and fluxes into a fused aggregate (sinter) that is used as burden material in the blast furnace. The rate of this process is predicted by measuring the ...
  • Variation of the redox conditions and the resultant phase assemblages during iron ore sintering 
    Van den Berg, Teresa; De Villiers, J.P.R. (Johan); Cromarty, Robert Douglas (Elsevier, 2016-05)
    The oxygen potential prevailing during iron ore sintering wasmeasuredwith a zirconia sensor in a series of sinter pot experiments. Thiswas done to get a better indication of the redox conditions during commercial sintering. ...
  • Wear of magnesia-chrome refractory bricks as a function of matte temperature 
    Lange, Matthias; Garbers-Craig, Andrie Mariana; Cromarty, Robert Douglas (Southern African Institute of Mining and Metallurgy, 2014-04)
    The postulation that primary platinum group metal (PGM) matte will chemically react with magnesia-chrome bricks when temperatures exceed 1500°C was tested. Magnesia-chrome brick samples were heated in contact with matte ...