从镍钼矿冶炼烟尘浸出液中还原硒的热力学及应用  

Thermodynamics and application of selenium reduction from leaching solution of smelting dust of Ni-Mo ore

作　　者：侯晓川[1,2] 肖连生[1] 高丛堦[1] 张启修[1] 张贵清[1] 曹佐英[1] 李青刚[1] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083 [2]金川有色金属公司,金昌737100

出　　处：《中国有色金属学报》2010年第12期2431-2437,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家高技术研究发展计划资助项目(2007AA06Z129)

摘　　要：分析SO2在溶液中的存在形态,并对亚硫酸钠在酸性水溶液中还原硒进行热力学分析。通过实验研究验证热力学分析结果的正确性,并确定亚硫酸钠还原硒的最优技术参数:还原温度80℃,还原酸度3.5mol/L,搅拌速率400r/min,还原时间120min,亚硫酸钠加入系数β(亚硫酸钠质量与溶液中硒的质量比)为10。在最佳技术条件下,硒的还原率为99.18%,研制的硒粉品位为99.684%。XRD和SEM-EDS的分析结果表明:硒粉微观形态复杂,只观察到元素硒的特征谱线,证明还原硒粉纯度较高。The chemistry of sulphur dioxide in solution and the thermodynamics of selenium reduction using sodium sulphite from acidic solution were analyzed. The experiment results demonstrate the thermodynamic analysis. The optimum technological parameters were determined for reducing selenium by sodium sulfite. The reduction of selenium reaches 99.18%,and the grade of selenium powder reaches up 99.684% under the optimum conditions of acidity of 3.5 mol/L with stirring speed of 400 r/min at the reductive temperature of 80 ℃ for 120 min and the coefficient β （the mass ratio of sodium sulphite to selenium） of 10. The XRD and SEM-EDS analysis results show that the microcosmic morphology of powdered-selenium is complex,only the characteristic spectrum of elemental selenium is observed,which proves that the product of selenium powder is very pure.

关 键 词：硒 亚硫酸钠 还原 热力学 应用 

分 类 号：TF843.5[冶金工程—有色金属冶金]