30 January 2020

January’s meeting consisted of presentations given by Jaco Scholtz, CEO of the Pentalin Group of Companies and Kobus Du Plessis, Sales Director of Malvern Engineering.

Jaco’s presentation entitled “Dense Medium Beneficiation of Fine Coal – the South African Experience” discussed the fact that spirals are used in most mines on fine coal which restricts in achieving low cut points; efficient separation in high-gravity environments and cut point control.

Challenges experienced are overloading of discard magnetic separator under low yield conditions and dense medium cyclones separated by size and not density at 24D and there is a reduced speed of cyclone feed pumps to operate at 9D.

Kobus du Plessis from Malvern Engineering presented on “Reduction on OPEX by Optimising Separator Circuits in Coal Preparation Plants”. His presentation covered the classification of magnetic susceptibility as well as the basics of magnetic forces in a magnetic separator.

He elaborated that the process of magnetic separation is complex due to various factors which included magnetic susceptibility, magnetic and non-magnetic loadings as well as particle size distribution.

Snacks and refreshments were sponsored by Malvern Engineering.

21 November 2019

21 November 2019

The fifth Technical Meeting of 2019 of the Southern African Coal Processing Society  was held at the Colliery Training College (CTC) in Emalahleni on Thursday 21 November 2019 at 14h00.

The last meeting of every year is normally dedicated to presentations given by students that the society sponsors through the year.  We had five students who presented their findings on projects that they have been working on.
The presentations were as follows:

Sayuri Naidoo from the University of Kwa-Zulu Natal who presented her project on the “Fluidization of ultra-fine particles”.

Mpho Ramudzwagi from the University of Johannesburg who presented his project on “Optimization and modeling the process of de-mineralizing coal using a hydrocyclone”.

Kgotlelelo Sekgobela from the University of Johannesburg who presented his project on “Assessing mineral matter content in South African coal and their effect on its strength properties”.

Nthabiseng Leokaoke from the University of North West who presented her project on “Green coal development for application in fixed-bed catalytic gasification”.

Lizah Setsepu from the University of the Witswatersrand who presented her project on “Development of a binder for use with discard coal fines”.

A lot of interest was seen from the audience who asked detailed questions to each of the presenters. Congratulations to all of the presenters on excellent presentations.
Picture: Students from L-R: Mpho Ramudzwagi, Kgotlelelo Sekgobela, Nthabiseng Leokaoke, Lizah Setsepu and Sayuri Naidoo