Smelter capacity is, in the words of the Eastplats CEO a month ago, a "very, very interesting subject and a very expensive one!"
Although I know Platmin (a junior) has a loose ambition to build a smelter, Platmin projects are widely spread out over both limbs of the Bushveld so where they'd place it I'm not sure. Construction would probably be several years out. A fortnight ago, Africa Pacific Capital commented, "we are well placed to develop a mine and smelter facility over the next two years".
I haven't yet finished my background research on smelters on the Eastern Bushveld but there don't appear to be many. So far I have identified the Polokwane and Rustenburg smelters and two furnaces at Steelport.
DD