Now showing items 1-9 of 9

    • Adsorption of metal ions from fine coal tailings dump waste water using bio-char 

      Fosso-Kankeu, Elvis; Weideman, Reinhardt; Moyakhe, Dumisane; Campbell, Quentin; Waanders, Frans (EARET, 2018)
      Coal mining operations produce large amounts of tailings which contains heavy metals. Heavy metals such as cadmium (Cd) can cause environmental problems. The adsorption capacities of biochars produced from spent coffee ...
    • Coal product moisture control using stockpiles 

      Campbell, Quentin; Le Roux, Marco; Espag, Chané (Springer, 2016)
      The moisture content of product coal is a major factor influencing the efficiency of downstream coal utilization processes. Product stockpiles are often used as a control measure to regulate the moisture content of the ...
    • Column leaching of fine coal tailings: impact on environment and thickener operation 

      Moyakhe, Dumisane; Fosso-Kankeu, Elvis; Campbell, Quentin (EARET, 2018)
      The coal mining sector is synonymous with generating large quantities of waste. A comprehensive fraction of the waste is classified as fines (-500 µm) and ultrafine (-100 µm) particles, which accounts eleven per cent ...
    • Destoning of fine coal in a fluidized bed 

      Le Roux, Marco; Campbell, Quentin; Langner, Danie (Springer, 2016)
      Water scarcity is driving the development of dry coal beneficiation processes. A lot of research has gone into the development of dry dense medium fluidized bed technology (DMFB), especially in China. However, these processes ...
    • Drying of coal fines assisted by ceramic sorbents 

      Van Rensburg, M.J.; Le Roux, M.; Campbell, Q.P. (Springer, 2016)
      It is proposed to introduce contact sorption drying as a method to reduce the moisture content in coal fines. The aim of this study was to investigate the possibility of drying fine and ultra-fine coal using porous ceramic ...
    • Effect of fine coal tailing porosity on the mobility and speciation of heavy metals in the leachates 

      Fosso-Kankeu, Elvis; Olivier, Charl; Moyakhe, Dumisane; Barlow, Brad; Campbell, Quentin; Waanders, Frans (EARET, 2018)
      The effect of porosity of coal tailings on the mobilization and speciation of heavy metals is important for the implementation of management strategies. In this study, column leaching experiments were carried out to ...
    • Improved gold recovery by accelerated gravity separation 

      Waanders, F.B.; Campbell, Q.P. (Gecamin Publishers, 2014)
      This project was specifically aimed at using increased acceleration separation, as a method to optimize the recovery of gold in an ore body mainly consisting of hematite where the specific gravity of gold is much higher ...
    • Simulation of washability and liberation information from photographs 

      Dorland, H.C.; Campbell, Q.P.; Le Roux, M.; McMillan, K.; Dorland, M.I. (Springer, 2016)
      Imagine that a sample of coal could be crushed unlimited times to the same or different top size; a different washability would be obtained for each crushing experiment. Depending on the size and distribution of the raw ...
    • Using visual texture analysis to classify raw coal components 

      Van Vuuren, Pieter A.; Le Roux, M.; Venter, W.C.; Campbell, Q.P.; Dorland, H.C. (IEEE, 2015)
      Coal ore isn’t a uniform material. In order to optimize the coal liberation process it is necessary to classify a coal ore sample into its constituent components as quickly and cheaply possible. This paper investigates ...