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Browsing by Subject "Metals"

Now showing items 1-16 of 16

Effect of process control agent (PCA) on the characteristics of mechanically alloyed Ti-Mg powders [Conference paper]

Author: Machio, Christopher N ; Chikwanda, HK ; Chikosha, S Date: Oct 2010 This article reports results of a study to determine the effect of process control agent (PCA) on the characteristics of Ti-Mg powders during milling. It has been shown that a 2% increase in PCA content leads to up to a 40% increase in yield ... Read more
Effectiveness of using pure copper and silver coupon corrosivity monitoring (CCM) metal strips to measure the severity levels of air pollutants in indoor and outdoor atmospheres

Author: Foax, LJ ; Mazibuko, NE Date: Oct 2008 Severity levels of air pollutants rich in oxides, chlorides and sulphides were successfully measured in indoor and outdoor atmospheres using pure copper and silver coupon corrosivity monitoring (CCM) metal strips when the maximum exposure ... Read more
Fate, transport and effects of pollutants originating from acid mine drainage in the Olifants River, South Africa

Author: Dabrowski, JM ; Dabrowski, James M ; Hill, Liesl ; Macmillan, P ; Oberholster, Paul J Date: Aug 2014 Concentrations of pollutants were measured in water, sediment and algal samples collected along a longitudinal gradient from a stretch of the Olifants River, South Africa, that receives acid mine drainage (AMD) from the Klipspruit River. The ... Read more
Graphene synthesis, catalysis with transition metals and their interactions by laser photolysis

Author: Mwakikunga, Bonex W ; Hillie, KT Date: Sep 2011 This chapter introduces some facts about graphene, how it was discovered, how it has been realised by several approaches and how to get its identity. Its identity is seen either through cross-sectional TEM or through its unique signature in ... Read more
Investigating sales and production volumes of gold, PGM, iron ore and manganese using a Bayesian change point detection approach

Author: Ingham, M ; Das, Sonali ; Yadavalli, S Date: Oct 2017 This paper identified change points in the production volumes and sales of various Industrial Metals in South Africa from the period 2003 – 2016. The socio-economic environment in which the mining sector operates is complicated, with countless ... Read more
Magnesium: origin and role in calcium-treated inclusions

Author: Pistorius, PC ; Presoly, P ; Tshilombo, G Date: Aug 2009 Steel was sampled after calcium treatment at an industrial steel plant, and the inclusions identified by energy-dispersive X-ray microanalysis (EDX) on polished sections of the samples analysing the samples in a scanning electron microscope. ... Read more
Manual of methods for use in the South African Marine Pollution Monitoring Programme

Author: Watling, RJ Date: Jul 1981 Methods used in the South African Marine Pollution Monitoring Programme for the analysis of toxic metals, nutrients, oxygen absorbed, chlorophyll, pesticides and bacteria are described. Sample types include biological material, sediments, ... Read more
Mechanical properties of 5083 aluminium welds after manual and automatic pulsed gas metal arc welding using E5356 filler

Author: Mutombo, K ; Du Toit, M Date: 2010 Semi-automatic and automatic pulsed gas metal arc welding (GMAW) of aluminium alloy 5083 with ER5356 filler wire causes considerable softening in the weld. The tensile strength of dressed automatic welds approaches that of the base metal, but ... Read more
Merensky pillar strength formulae based on back-analysis of pillar failures at Impala Platinum

Author: Watson, BP ; Ryder, JA ; Kataka, MO ; Kuijpers, JS ; Leteane, FP Date: Aug 2008 The Bushveld platinum group metal deposits are two distinct, shallow-dipping stratiform tabular orebodies and strike for many hundreds of kilometres. Mining is extensive, with depths ranging from close-to-surface to 2 000 m. The mining method ... Read more
Microstructure and wear behaviour of Al/TiB2 metal matrix composite

Author: Popoola, AP ; Pityana, Sisa L ; Ogunmuyiwa, E Date: Oct 2010 Al/TiB2 metal matrix composite (MMCs) was fabricated on aluminium AA1200 with the aim of improving the wear resistance property of the substrate. The characterization of the MMCs was carried out by Optical Microscopy (OM), Scanning Electron ... Read more
The potential of acidophilic macroalgae as part of passive bioremediation technology for acid mine drainage in constructed wetlands

Author: Cheng, Po-Hsun ; Oberholster, Paul J ; Botha, A-M Date: Oct 2012 The properties of acid mine drainage (AMD) render water resources less habitable to various biota, hence waters that receive AMD are often characterised by very low biodiversity and the flora and fauna become dominated by highly tolerant ... Read more
Progress made by the South African light metals development network

Author: Damm, O ; Du Preez, W Date: 2009 Through focused investment by the CSIR, the South African Innovation Fund, the Automotive Industry Development Centre and the Department of Science and Technology over the past eight years, the national Light Metals Development Network has ... Read more
Prospective and retrospective spatial sampling scheme to characterize geochemicals in a mine tailings area

Author: Debba, Pravesh Date: Jul 2009 This study demonstrates that designing sampling schemes using simulated annealing results in much better selection of samples from an existing scheme in terms of prediction accuracy. The presentation to the SASA Eastern Cape Chapter as an ... Read more
Recovery of drinking water and by-products from gold mine effluents via alkali-bariumcalcium processing

Author: Wilsenach, J ; De Beer, Morris ; Motaung, S ; Bologo, L ; Redebe, V ; Moalusi, M ; Maree, J Date: Nov 2008 Acid mine drainage results from active as well as decommissioned mines in the gold mining and coal mining fields. This water is highly acidic, containing sulphate, iron, aluminium, heavy metals and some radioactivity. When discharged into the ... Read more
Review of metal concentrations in Southern African coastal waters, sediments and organisms

Author: Hennig, HF-KO Date: Aug 1985 In this report Background levels and levels of metal accumulation in water, sediments and fauna were determined using a typical data set from South Africa-This was done to establish the extent and reliability of the available data and to ... Read more
Synthesis and electrochemical properties of LiNi0.4Mn1.5Cr0.1O4 and Li4Ti5O12

Author: Liu, GQ ; Wen, L ; Liu, GY ; Luo, HZ ; Ma, BY ; Wu, QY ; Tian, YW Date: Aug 2011 Spinel compound LiNi0.4Mn1.5Cr0.1O4 (LNMCO) and Li4Ti5O12 (LTO) were synthesized by the sol-gel method and the solid-state method, respectively. The particle sizes of the products LiNi0.4Mn1.5Cr0.1O4 and Li4Ti5O12 were 0.5 to 2 um and 0.5 to ... Read more

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