Experimental study on antimony recovery from antimony electrolytic deposition lean solution
In response to the high content of antimony in the lean solution of antimony electrolytic deposition and the high grade of antimony in the agitation rate antimony residue from acidification and precipitation,which leads to low antimony recovery in alkaline leaching after blending with low-grade ore,experiments were conducted on acidifica-tion and precipitation of antimony cooling crystallization-alkaline leaching-electrolytic deposition process.Through single-factor acidification and precipitation experiments,the effects of pH,reaction temperature,agitation rate,and cool-ing crystallization on the effect of acidification and precipitation of antimony were investigated.The results show that under the conditions of pH 5 for acidification and precipitation of antimony,a cooling crystallization temperature of 10℃,a slurry concentration of 20%for alkaline leaching,Na2S concentration of 85 g/L,NaOH concentration of 40 g/L,alkaline leaching time of 1 h,NaOH concentration of 70 g/L in the electrolytic deposition solution,current of 4.80 A,cathode area to anode area ratio of 5.8∶1,and electrolytic deposition time of 50 h,the antimony recovery rate in the electrolytic deposition experiment reached 82.29%,with an antimony grade on the cathode of 92.72%,thus enhanc-ing resource utilization.
electrolytic deposition lean solutionantimonyacidification and precipitationalkaline leachingwet antimony refining
万方数据
维普
