Ore sorters, concentrators and iron grade discussion, page-7

Amigo, a great effort and a good read. I have heard that optical ore sorters using laser light, were initially developed in Alaska to produce gold concentrates from ore with fine gold that was not easily concentrated by gravity (my recollection, so I may be wrong on this). Anyway, the plant I have seen has an ore sorter that looks like a large shipping container. All the crushed ore goes through it, then the concentrate goes through the next stages. It is fast and highly efficient. But maybe TG6 has pegmatite with high grade lithium, that doesn't need this technique.