Antimony Arsenic separation: main antimony sulfide minerals stibnite Sb 2 S 3, containing Sb71.4%, secondary lead antimony sulfide ore 2PbS · Sb 2 S 3 sulfur antimony ore silver 3Ag 2 S · Sb 2 S 3, and Wheel mine 2PbS·Cu 2 S·Sb 2 S 3 and the like.
Such as Pb 2+, Cu 2+ activated when xanthate collector stibnite, it is necessary with a heavy metal ion. Activation pH range of copper sulfate stibnite from 4 to 7.4. Unactivated stibnite, which can be used as a collector , can be inhibited by K 2 Cr 2 o 7 , provided that there is a large amount of Pb 2+ in the slurry, which will form Pb 2+ on the surface of the stibnite. Insoluble surface compound. According to this theory, the separation of stibnite and cinnabar was successfully achieved. First, lead nitrate was used as an activator for mercury hydrazine mixed flotation. When the mixed concentrate was separated, K 2 Cr 2 o 7 was added to inhibit stibnite.
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