Abstract
Furnace slag and matte samples from Anglo Platinum smelters were analysed using a combination of electron microbeam and Mossbauer techniques. The object of the investigation was to establish the distribution of the base metals (nickel, copper and cobalt) in slag, and to predict their recovery by milling and flotation. In addition, the data was used to assess the viability of process optimisation using a modelling program. Slag samples were analysed quantitatively by EPMA, employing longer counting times for trace elements, and correcting for Fe-Kβ peak interference on Co-Kα An automated software program was used to run phase specific analysis of entrained matte inclusions in slag. The technique allows simultaneous measurement of inclusion size, and correlation of size with composition. The results were combined with EPMA data to determine maximum theoretical base metal recovery from slag.
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