In connection with the drop in high-grade antimony ore reserves, the question has arisen of how to bring low-grade antimony-containing materials - as well as secondary raw material and wastes - into production. This report presents the results of research into the processing of sulfide-oxidized arsenous-antimony ores, The difficulty in processing such ores is the fact that their antimony content is found in both sulfide (Sb_sS_3) and oxide (Sb_2O_3, Sb_2O_5) forms. The degree of ore oxidizability is >60 percent. The classic flotation method is unsuitable, since the oxide form will not float but will be irrevocably lost together with gangue. Another difficulty in processing this raw material was that the ore included arsenic compounds which are difficult to separate and possess toxic properties.
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