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SAIMM: Journal Volume 120, No. 05, May 2020  Contents Journal Comment: New Challenges to be Faced in 2020 by R.M.S. Falcon President's Corner: Lessons from 'rona' by M.I. Mthenjane   Book Review: Ground Support for underground mines by Y. Potvin and J. Hadjigeorgiou MINE, HEALTH AND SAFETY Assessment of the ergonomic design of self-contained self-rescuer (SCSR) devices for use by women in mining By J.J. Pelders and J.H. de Ridder The aim of this project was to assess the ergonomic design of self-contained self- rescuer devices (SCSRs) for use by women in the South African Mining Industry. Dimensional limitations or shortcomings of current SCSRs. The study findings can be used to inform interventions to improve the design and fit of SCSRs. PAPERS OF GENERAL INTEREST Removal of arsenic from water using copper slag By T. Türk,  . Alp, R. Sezer, and C. Arslan The potential use of copper slag (CS) as adsorption material in the removal of arsenic contaminant from water were exaamined. The adsorption kinetics indicated that the second-order kinetic model best described the adsorption process. Based on the results, copper slag was shown to be a suitable adsorbent for removal of arsenic from water, with capacity to reduce arsenic levels to <10 µg/L arsenic, below the limit set for water by World Health Organization.   Preliminary investigation into the extraction of light rare earth elements from different resources using the sulphation roasting process By K.C. Maluleke, X.C. Goso, S. Ndlovu, E. Matinde, and S. McCullough Co-extraction of gangue elements with rare earth elements (REEs) is undesirable as it complicates downstream separation and purification processes. Preliminary tests were conducted on synthetic cerium oxide (chemical grade CeO2) to investigate the technical feasibility of the sulphation roasting process for the extraction of REEs from different resources. The preliminary results indicate that it may be feasible to produce REEs from different resources using the established selective sulphation roasting process.   In-truck ore grade estimation using apparent density measurements By J. Giroux, F-A. Consuegra, M. Fillion, G. Fortin, D. Horth, and D. Michaud The Rio Tinto Iron and Titanium (RTIT) Havre St-Pierre (HSP) mine in Canada has implemented a grade detection system based on the determination of the apparent density of the material loaded into mine trucks. This is used to segregate economic ore from waste as part of the re-handling of a historical waste stockpile. The system takes advantage of the strong relationship established between ore density and grade for the HSP mineralization. In the future, this in-truck grade detection technology could be expanded to the entire mine operation and be instrumental in ore vs waste discrimination and production reconciliation.   An investigation into the wear mechanisms of carbon- and silicon carbide-based refractory materials by silicomanganese alloy By W.K. Banda, J.D. Steenkamp, and E. Matinde Two carbon-based refractories, a type K and and a type SiC material, were studied to understand the main wear mechanisms when in contact with SiMn alloy and to determine which refractory would be most suitable for application in the hearth area of a SiMn producing furnace. Type K refractory was found to be the most suitable refractory to use.   Thiol collector blends for improved PGM recovery: a case study of a UG2 ore By M.G. Moja, I.O. Otunniyi, and P. Mendonidis Different thiol collectors are widely used to improve the flotation performance of PGM- containing ore. The performance of sodium n-propyl xanthate (SNPX),dithiocarbamate (DTC), and O-isopropyl-N-ethyl thionocarbamate (IPETC) collectors was evaluated in order to improve the recovery of PGMs from UG2 ore. The best blend improved the 3PGM + Au recovery from 81% to 86% without compromising the grade. There is room for continued research on the most effective blends.   Purification of crude titanium powder produced by metallothermic reduction by acid leaching By M.R. Serwale, T. Coetsee, and S. Fazluddin A process is under development that aims to produce commercially pure (CP) grade 4 titanium metal powder by direct metallothermic reduction of TiCl4. Crude titanium produced by this method is inevitably contaminated. Acid leaching was identified as a suitable method for purifying the crude reduction mass. Results demonstrated that when the pH of the media and temperature are controlled, the drawbacks associated with acid leaching can be overcome and the process used successfully for downstream purification of the crude product. For more information regarding the SAIMM Journal please contact: Kelly Matthee Journal Co-ordinator Telephone: +27 11 834 1273  l  Facsimile: 086 585 2901 E-mail: kelly@saimm.co.za l  Website: www.saimm.co.za

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SAIMM: Journal Volume 120, No. 05, May 2020

Dear SAIMM members and subscribers, Attached, is the May 2020 Journal. Please note the e-mailed PDF document is highly compressed, in order to make it as small as possible for sending by e-mail.  We urge you to view a higher-quality version that is also available for downloading from the SAIMM website, where full copies of the Journal will be available for downloading at any time using the link below. http://www.saimm.co.za/FullJournal/   For people who like a page-turning electronic copy to read on their tablets, there is a service available at http://www.issuu.com/saimm at no cost.   Please send any feedback you wish to provide to Kelly Matthee at Kelly@saimm.co.za. Regards, Mzila Mthenjane SAIMM President 2019-2020 Rosemary Falcon SAIMM Editorial Consultant

Unsubscribe • Update Profile • View PDF • Pause Subscription • View Online This email was sent to kukash@gmail.com on 31-07-2020 by SAIMM, The Minerals Council South Africa, 5th Floor, 5 Hollard Street, Marshalltown, Johannesburg, 2107 SAIMM mail is intended for opt-in communication only. If you feel this email is unsolicited please report it to us Email Powered By SAIMM mail