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.