铁矾渣热酸分解及硫脲提银

发布时间：2018-04-19 19:25

  本文选题：铁矾渣 + 湿法炼锌　； 参考：《中国有色金属学报》2017年07期

【摘要】：进行铁矾渣热硫酸分解和分解渣硫脲法提银的试验研究,考察硫酸用量、分解温度、反应时间、液固比对铁矾渣中Fe、Zn、Ag浸出率的影响,以及硫脲法提银的最优条件。结果表明:在硫酸用量为其理论值的1.5倍、分解温度95℃、时间2.5 h、液固比2.5:1的最佳条件下,铁矾渣中Fe和Zn浸出率分别为93.85%和92.25%,而Ag的浸出率仅为1.99%。分解液净化后可用中温水热法制备铁红,分解渣中Ag富集到1060 g/t。在液固比10:1、硫脲浓度15 g/L、浸出温度90℃、反应时间2.5 h的最优条件下,Ag的平均浸出率在93%以上,同时,渣中Pb的品位由1.7%提高到7.5%。
[Abstract]:The influence of the amount of sulfuric acid, decomposition temperature, reaction time, liquid / solid ratio on the leaching rate of Fe ~ (2 +) Zn ~ (2 +) Ag in the ferrite slag and the optimum conditions for silver extraction by thiourea method were investigated. The results showed that the leaching rates of Fe and Zn were 93.85% and 92.25%, respectively, under the optimum conditions: the amount of sulfuric acid was 1.5 times of its theoretical value, the decomposition temperature was 95 鈩，

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