锌硫渣硫脲浸出回收银工艺参数研究  

Study on process parameters for silver recovery from zinc-sulfur residue via thiourea leaching

作　　者：周兴 陈凯 彭庆民 刘祖涛 柴兴雄 和飞 Zhou Xing;Chen Kai;Peng Qingmin;Liu Zutao;Chai Xingxiong;He Fei(Yunnan Dianjin Investment Co.,Ltd.,Yunnan Gold Mining Group Co.,Ltd.;School of Metallurgical and Energy Engineering,Kunming University of Science and Technology)

机构地区：[1]云南黄金矿业集团云南滇金投资有限公司 [2]昆明理工大学冶金与能源工程学院

出　　处：《黄金》2025年第2期99-103,共5页Gold

摘　　要：云南某湿法炼锌厂氧压浸出炼锌过程中,产生了大量含银锌硫渣。为有效回收锌硫渣中的银,系统地探究了硫脲法浸出回收银的工艺参数。研究结果揭示,硫脲法浸出银具有显著的化学反应驱动力,硫脲在银表面的结合能为83.9 kJ/mol;在液固比为8∶1、硫脲用量为10 g/L、浸出时间为2 h、浸出温度为50℃、pH值为1.5、Fe^(3+)浓度为0.3 mol/L的条件下,银浸出率可达85.71%。研究结果不仅为锌硫渣中银资源的高效回收提供了科学依据,同时也为硫脲法在湿法炼锌工艺中的进一步应用提供了理论支撑,对于推动湿法炼锌工艺中银资源的综合回收与利用具有重要意义,有望为企业创造更大的经济效益。During the oxygen pressure leaching process for zinc refining in a hydrometallurgical zinc⁃refining plant in Yunnan,large quantities of silver⁃bearing zinc-sulfur residue are produced.To effectively recover silver from this residue,the process parameters of silver recovery via thiourea leaching were systematically investigated.The results revealed that thiourea leaching has a significant chemical reaction driving force,with a binding energy of 83.9 kJ/mol on the silver surface.Under optimal conditions of a liquid⁃solid ratio of 8∶1,thiourea dosage of 10 g/L,leaching time of 2 h,leaching temperature of 50℃,pH value of 1.5,and Fe^(3+)concentration of 0.3 mol/L,a silver leach⁃ing rate of 85.71%was achieved.The study provides a scientific basis for efficient silver recovery from zinc-sulfur resi⁃due and theoretical support for the further application of the thiourea method in hydrometallurgical zinc⁃refining pro⁃cesses.This approach contributes to the comprehensive recovery and utilization of silver resources in hydrometallurgi⁃cal zinc production and has the potential to generate significant economic benefits for enterprises.

关 键 词：锌硫渣 硫脲法 银回收 浸出 工艺参数 湿法炼锌 

分 类 号：TF111.3[冶金工程—冶金物理化学]