Cascade recovery method for arsenic-containing antimony-containing gold ore difficult to process
A technology for cascade recovery and gold mining, which is applied to the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of inability to directly apply the separation and extraction of low-antimony-containing minerals, and achieves improved gold and silver recovery rate, low energy consumption, and high technology. short process effect
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[0028] A cascade recovery method for refractory gold ores containing arsenic and antimony, (1) using refractory gold concentrates containing arsenic and antimony as raw materials, first adding sodium sulfide under alkaline conditions, and selectively leaching antimony under controlled conditions . (2) Liquid-solid separation of leached ore slurry, electrowinning of leachate to obtain cathode antimony, return of poor electrowinning solution to the leaching section for recycling, and purify and remove impurities from electrowinning poor solution. (3) The leaching slag is washed, the washing liquid is added with concentrated sulfuric acid to precipitate antimony, the liquid after antimony precipitation is returned to the washing cycle, and the antimony precipitation slag is returned to leaching. (4) Then roast the leaching residue to remove arsenic and desulfurize, so that arsenic and sulfur enter the flue gas, the flue gas is chilled and crystallized to recover arsenic trioxide,...
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