Magnetite is a ferromagnetic mineral – its high magnetic content makes it easy to recover and it has a high relative density. Pyrophyllite is an aluminium silicate found largely in schistose rocks. It is found in metamorphosed clay that was originally volcanic ash.
This is a dry-milled iron ore and is produced as a by-product of the phosphate mining process. The processing plant feeds the by-product through a process which dries, magnetically separates, mills, classifies and packs it. The final product is sold
to the coal industry as a heavy separation medium used in
An aluminium silicate, pyrophyllite is used in the paper industry as a pitch-controlling agent and as a filler and extender in the paint manufacturing sector.
Based on the site of a major phosphate producer, the Idwala Magnetite operation uses the processes of magnetic separation and fine milling to upgrade material from the tailings site.
IDWALA INDUSTRIAL MINERALS
The pyrophyllite raw material is sourced from a quarry near Ottosdal in the North-West Province and milled or micronised
at the Idwala Industrial Minerals operation in Benoni, Gauteng.