摘要
采用常压浸出—还原富集的方法,以次氯酸钠与硝酸为混合浸出剂,将铜冶炼酸泥中的汞转化为Hg2+转移至浸出液中,再将其还原富集为零价汞而分离。结果表明,铜酸泥中汞浸出的最佳条件为:液固比5mL/g、搅拌速度500r/min、浸出温度20℃、浸出时间30min、浸出液硝酸与次氯酸钠体积比4∶1,铜酸泥中汞浸出率可达93.6%。在浸出液中添加0.1%浓度为10%的次亚磷酸钠,絮凝沉降后,富汞渣中汞品位高达20.6%,达到制汞原料的需求,实现了酸泥中汞的净化与资源化。
Purification and recycling of mercury from acid mud of copper smelting by method of atmospheric leaching and reducing enrichment were investigated with NaClO and HNO 3 mixed solution as leaching agent.The results show that Hg leaching rate is 93.6%under the optimum leaching conditions including ratio of liquid to solid of 5 mL/g,stirring rate of 500 r/min,leaching temperature of 20℃,leaching time of 30 min,and volume ratio of HNO 3 to NaClO of 4∶1.After addition of 0.1%volume ratio of 10%NaH 2PO 2 to lixivium,Hg content in enrichment slag is 20.6%which can serve as materials to prepare mercury.
作者
黄凯
安俊菁
赵杨
孙科源
HUANG Kai;AN Jun-jing;ZHAO Yang;SUN Ke-yuan(Yunnan Province Center of Solid Waste Management,Kunming 650030,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2019年第7期21-24,共4页
Nonferrous Metals（Extractive Metallurgy)
基金
云南省2017年环保专项资金资助项目(2017HPC002)
关键词
铜冶炼
酸泥
汞
浸出
还原富集
copper smelting
acid mud
mercury
leaching
reducing enrichment method
