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Browsing by UP Author "Groot, D.R."
Now showing items 1-13 of 13
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Ogunniyi, I.O.; Vermaak, M.K.G. (Matthys Karel Gerhardus); Groot, D.R. (Elsevier, 2009-07)Chemical composition and liberation are critical attributes in characterizing a resource stock for beneficiation investigations. Though end-of-life printed circuit board is recognized as a valuable secondary resource stock, ...
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Kazadi, Dieudonne M.; Groot, D.R.; Steenkamp, J.D. (Joalet Dalene); Pöllmann, H. (Elsevier Science Limited, 2016-12)A major obstacle to the hydrometallurgical treatment of ferromanganese slags is the way in which silica polymerisation is controlled during sulphuric acid digestion and water leaching. In an acidic medium, silica enters ...
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Rademan, L.; Groot, D.R. (Southern African Institute of Mining and Metallurgy, 2012-04)The kinetic leaching behaviour of a low-grade surface gold ore and a high-grade reef ore were evaluated to determine the achievable gold recovery from these ores and particularly mixtures of these ores. The reef ore ...
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Fungene, T.; Groot, D.R.; Mahlangu, T.; Sole, K.C. (Kathryn) (Southern African Institute of Mining and Metallurgy, 2018-12)Although oxygen is widely employed as the oxidant of choice in gold leaching by cyanide, its low aqueous solubility presents some drawbacks in practical application; hydrogen peroxide has therefore been considered as a ...
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Muhlare, T.A.; Groot, D.R. (Southern African Institute of Mining and Metallurgy, 2011-05)The use of electrolyte additives to smoothen cathode deposits during copper deposition is practised worldwide. These additives absorb on the cathode surface and take part in the electrochemical crystallization process. ...
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Heukelman, S.; Groot, D.R. (Southern African Institute of Mining and Metallurgy, 2011-11)Zincor, a zinc refinery in South Africa, uses oxygen enrichment of up to 26% O2 in its fluidizing air to increase concentrate-throughput in its fluidized bed roasters. The aim of the study is to determine whether O2 ...
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Heukelman, S.; Groot, D.R. (Southern African Institute of Mining and Metallurgy, 2011-11)Zincor uses O2 enrichment (up to 26% O2 in the fluidizing air) to increase the processing rate of zinc concentrates in the fluidized bed roasters. The aim of this study is to determine whether O2 enrichment can be reduced ...
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Jacobs, J.C.; Groot, D.R. (Southern African Institute of Mining and Metallurgy, 2019-11)Electrowinning circuits normally use a number of additives in the electrolyte to promote smooth, compact deposits. These cathodes have the best levels of purity. When electrowinning is coupled to a solvent extraction ...
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Mare, G.S.; Groot, D.R. (Southern African Institute of Mining and Metallurgy, 2010-04)No abstract available.
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Kweto, Bundjoko; Groot, D.R.; Stassen, E.; Suthiram, J.; Zeevaart, Jan Rijn (Springer, 2014-10)The purpose of this study was to determine the kinetics of the dissolution of a uranium residue in ammonium carbonate media. The residue is generated in the production of medical isotopes. The effects of parameters, such ...
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Groot, D.R.; Van der Linde, J.A.N. (Southern African Institute of Mining and Metallurgy, 2009-12)A brief overview is given of the issues regarding the processing of waste electrical and electronic equipment (WEEE). The printed circuit board component of WEEE is an exceptionally complex feed to possible recycling ...
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Groot, D.R.; Van der Linde, J.A.N. (Southern African Institute of Mining and Metallurgy, 2009-12)Scrap printed circuit boards were selectively smelted at 1 200°C to produce a metallic alloy having three phases. These phases were identified as a lead-rich phase, a low tin content alpha bronze phase, and a high tin ...
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Baumgartner, S.J.; Groot, D.R. (Southern African Institute of Mining and Metallurgy, 2014-04)The ferromanganese industry is under pressure to deal with the slag arising from the production of ferromanganese, which is discarded in landfills or slag heaps. This material poses an environmental and health risk to ...
Now showing items 1-13 of 13