RE:Newbies know nothinghttps://www.theassay.com/articles/analysis/getting-a-handle-on-refractory-ore-may-determine-golds-near-future/
Heres a good read.....
Refractory ore can still be processed, it just needs to be roasted (most commonly) first. Any Lead or Zinc smelter will be capable of doing this. Many if not most copper smelters also are able to roast concentrates....or soon will be as it gives them access to 25% more of the world's gold reserves....