Academic Staff

Gaynor Yorath

BSc Hons Min Proc CSM, U. Exeter (1985)


Gaynor Yorath is Senior Scientific Officer operating the FEI FEG QEMSCAN quantitative evaluation of minerals through scanning electron microscopy) instrument in the Centre for minerals Research in the Department of Chemical Engineering. The QEMSCAN instrument is used extensively in supporting the teaching and research activities within the CMR. Prior to this she was involved in a major flotation research project within the CMR, and also in coordinating a two year metallurgical development programme for the annual intake of the Anglo American Platinum graduates. Before joining UCT in 2006, she worked for Senmin in marketing, sales and technical assistance of flotation chemicals to major platinum, gold and copper mines within South Africa and with Metso in marketing, pricing and selection of Comminution equipment for Greenfield site projects especially for the platinum industry within South Africa. She was extensively involved in the development of flotation processes for deposits in South Africa, Uzbekistan, Ghana, Brazil, Australia and Malaysia with Billiton Process Research, a Palabora smelter upgrade study with Davy South Africa, and the research and development of a new process for the surface protection on the Ferranti semiconductors in UK. She also worked as a plant Metallurgist on a plant producing tin, copper and zinc concentrates for smelting.


2012 – present  Senior Scientific Officer, Dept of Chem Eng; UCT
2008 – 2012 Scientific Officer, Department of Chemical Engineering; UCT
2006 – 2007 Assistant Lecturer Anglo Platinum Graduate Development Programme; UCT
2001 – 2004 Product Manager Flotation Reagents; Senmin, Sasolburg
1998 – 2000 Capital Sales Manager; Metso, Johannesburg
1991 – 1998 Senior Research Metallurgist; Billiton Process Research;  Johannesburg
1990 Process Engineer; Davy South Africa; Johannesburg
1988 – 1990 Research and Development Officer; Ferranti Semiconductors, Chadderton, UK
1985 – 1988 Metallurgist; Wheal Jane Tin, Copper and Zinc Mine, Truro, Cornwall, UK


Research Interests

Process mineralogy, ore characterisation, comminution and flotation, rheology

Selected Publications

​​​​​​​Becker, M., Yorath, G., Ndlovu, B., Harris, M., Deglon, D., Franzidis, J.P., 2013. A rheological investigation of the behaviour of two Southern African platinum ores. Miner. Eng. 49, 92–97.

Little, L., Becker, M., Wiese, J.G., Yorath, G., Mainza, A.N., Tonzetic, I., 2016. Shape characterisation: Can different devices produce comparable data for particulate samples?, in: 28th International Mineral Processing Congress. Quebec, Canada.