Yeap, as it mentioned, the iron is within the spodumene mineral lattice. If you have a very strong magnet, you'll just end up removing the whole Spodumene, but those are very low iron content for the a magnet to pick up.
based on my memory of the research I've done previously (sorry, can't quote any as I can't remember the sources any more), the iron can be removed from the SC by heating it up to over 1000 degrees Celsius (usually in a calciner) so that they will react with the acid. The iron gets separated from the SC because the lithium is LEECHED OUT of the SC, not really as simple as removing the iron. (This should be in line with the understanding of those who heard the latest global lithium podcast between Alison Dai from ChempPhys with Joe Lowery)
Anyone is welcome to correct me if I'm wrong, as this is solely from my memory
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Yeap, as it mentioned, the iron is within the spodumene mineral...
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