锌加压浸出渣浮选硫精矿汞硫分离富集研究  

Separation and enrichment of mercury and sulfur from flotation sulfur concentrate derived from zinc pressure leaching residue

作　　者：王子阳[1,2,3] 张泽彪[1,2,3] 刘能生[1,2,3] 彭金辉[1,2,3] 王万坤[1,2,3] 陈安然[1,2,3] 

机构地区：[1]昆明理工大学云南省复杂有色金属资源清洁利用国家重点实验室(培育基地),云南昆明650093 [2]昆明理工大学非常规冶金省部共建教育部重点实验室,云南昆明650093 [3]昆明理工大学云南省微波能应用及装备技术工程实验室,云南昆明650093

出　　处：《中南大学学报（自然科学版）》2013年第3期901-906,共6页Journal of Central South University:Science and Technology

基　　金：昆明理工大学分析测试基金资助项目(2011196)

摘　　要：对锌加压浸出渣经浮选后的硫精矿中的汞硫分离、富集以及硫磺回收进行研究,确定硫化铵溶液浸出过程汞硫分离和浸出母液热分解回收硫磺的最佳工艺条件。试验结果表明:在常温常压下,(NH4)2S浓度为2.5mol/L、液固比6:1、时间10min的浸出条件下,硫浸出率达98.66%,汞在渣中的富集率为93.8%,浸出渣中汞含量为原矿的6倍以上;浸出母液在热分解温度94℃、分解时间90min的条件下,硫磺回收率在98%左右,硫磺纯度符合GB/T2449—2006工业硫磺一等品标准;硫化铵试剂可循环利用,回收率为91.76%。The separation and enrichment of mercury and sulfur recovery from flotation sulfur concentrate derived from zinc pressure leaching residue were studied.The optimum procedure parameters were determinated for separation of mercury and elemental sulfur in flotation sulfur concentrate leaching with ammonium sulfide and the recovery of elemental sulfur in polysulfide solution by thermal decomposition.The results show that 98.66%of elemental sulfur is leached,and 93.8%mercury is enriched in residue at liquid/solid ratio of 6：1 with 2.5 mol/L ammonium sulfide concentration in 10 min at room temperature,and the content of mercury is enriched 6 times or more in leaching residue. About 98%sulfur is recovered in polysulfide solution thermal decomposing at 94℃in 90 min,with a purity of sulfur in accordance with the GB/T 2449—2006 industrial first-rate product standard.Ammonium sulfide can be recycled back into process and the efficiency of ammonium sulfide recovery is 91.76%.

关 键 词：锌加压浸出渣 浮选硫精矿 汞硫分离 硫磺回收 硫化铵 

分 类 号：TF111[冶金工程—冶金物理化学] TQ125.11[化学工程—无机化工]