Molybdenum removal from copper ore concentrate by sodium hypochlorite leaching  

作　　者：Liu Youcai Zhong Hong Cao Zhanfang 

机构地区：[1]College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

出　　处：《Mining Science and Technology》2011年第1期61-64,共4页矿业科学技术（英文版）

基　　金：the 11th Five-Year Plan of the National Scientific and Technological Program of China(No. 2007BAB22B01);the National Natural Science Foundation of China(No.50704036).

摘　　要：The removal of molybdenum from a copper ore concentrate by sodium hypochlorite leaching was investigated. The results show that leaching time,liquid to solid ratio,leaching temperature,agitation speed,and sodium hypochlorite and sodium hydroxide concentrations all have a significant effect on the removal of molybdenum.The optimum process operating parameters were found to be：time,4 h;sodium hydroxide concentration,10%;sodium hypochlorite concentration,8%;liquid to solid ratio,10：1;temperature,50℃;and, agitation speed,500 r/min.Under these conditions the extraction of molybdenum is greater than 99,9%and the extraction of copper is less than 0.01%.A shrinking particle model could be used to describe the leaching process.The apparent activation energy of the dissolution reaction was found to be approximately 8.8 kJ/mol.从铜矿石的铝的移动由沥滤的钠次氯酸盐专注被调查。结果显示出那沥滤的时间，到稳固的比率的液体，沥滤的温度，焦虑速度，和钠次氯酸盐，钠氢氧化物集中都在铝的移动上有重要效果。操作参数的最佳过程被发现是：时间， 4 h；钠氢氧化物集中， 10% ；钠次氯酸盐集中， 8% ；液体到稳固的比率， 10:1；温度， 50 掳 C；并且，焦虑速度， 500 r/min。在这些条件下面，铝的抽取比 99.9% 大，铜的抽取是不到 0.01% 。一个缩小的粒子模型能被用来描述沥滤的过程。溶解反应的明显的激活精力被发现是约 8.8 kJ/mol。

关 键 词：Wet leaching Copper concentrate MolybdenumKinetic Sodium hypochlorite 

分 类 号：TQ131.12[化学工程—无机化工] TD952[矿业工程—选矿]