微波碱性焙烧—水溶含锗氧化锌烟尘回收锗  

Recovery Germanium by Microwave Alkaline Roasting-water Dissolving from Zinc Oxide Dust Bearing Germanium

作　　者：王万坤 王福春 梁杰 

机构地区：[1]贵州省轻金属材料制备技术重点实验室,贵州贵阳550003 [2]贵州理工学院材料与冶金工程学院,贵州贵阳550003

出　　处：《矿产保护与利用》2017年第6期26-31,共6页Conservation and Utilization of Mineral Resources

基　　金：国家自然科学基金项目(51404081;51504073);贵州省自然科学基金项目(黔科合LH[2014]7373);贵州省教育厅自然科学基金项目(黔教科合KY[2015]433);贵州理工学院高层次人才启动基金项目(XJG20141104)

摘　　要：提出了微波碱性焙烧—水溶含锗氧化锌烟尘的新工艺,研究了配碱比、熟化时间、微波焙烧温度、液固比、水溶温度等对锗浸出率的影响规律。结果表明:在配碱比1 g·g-1、熟化时间5 d、微波焙烧温度400℃、保温时间10 min、液固比5 m L/g和水溶温度70℃时,锗的最佳浸出率为91.15%,与现有的常规碱性焙烧含锗氧化锌烟尘工艺对比可知,碱性焙烧温度从950~1 100℃降低至400℃,碱性焙烧保温时间由1~4 h降低至10 min,锗浸出率由80.35%提高至91.15%。Microwave alkaline roasting-water dissolving process was proposed to improve the germanium extraction. Alkali-material ratio,microwave heating temperature and leaching temperature are the significant factors for the process. By analyzing each factors systematically,the optimized conditions were obtained as follows,alkali-material ratio of 1 g·g-1,aging time of 5 day,microwave heating at 400 ℃,microwave alkaline roasting holding time of 10 min,liquid-solid ratio of 5 m L/g,leaching temperature at 70 ℃ with the germanium extraction about 91. 15%. Compared with the existing methods,the alkaline roasting temperature was reduced from 950 ~ 1 100 ℃to 408 ℃ and the alkaline roasting holding time was greatly reduced from 1 ~ 4 h to 10 min.

关 键 词：氧化锌烟尘 锗 浸出 微波焙烧 碱性焙烧 

分 类 号：TF046.2[冶金工程—冶金物理化学]