镍铁尾矿酸浸过程的响应曲面分析  

Optimization of Ni-Fe tailings leaching in sulfuric acid by response surface methodological analysis

作　　者：陈安安[1] 周少奇[1,2,3] 赵晶晶[1] 

机构地区：[1]华南理工大学环境科学与工程学院,广东广州510006 [2]华南理工大学亚热带建筑科学国家重点实验室,广东广州510640 [3]广东省教育厅环境保护与生态修复重点实验室,广东广州510006

出　　处：《现代化工》2013年第2期99-103,共5页Modern Chemical Industry

基　　金：广州市重大科技项目(2008DLB2080500);"十一五"国家科技制成计划项目(2008BAE64B05)

摘　　要：采用了Box-Behnken设计的响应面法(RSM)对硫酸浸出镍铁尾矿中的镁的浸出率进行了研究。使用Design Expert7.1软件得到了一个二次响应曲面模型,该模型有较高的回归率(R2=0.926 8,Adj R2=0.832 6),通过模型验证,该模型有较优的预测效果。分析表明,温度对浸出率的影响最为显著,但这3个因素之间的交互作用不显著。浓度-温度之间的协同作用比浓度-时间对镍铁尾矿渣中镁的浸出效率的提高更有利。最后通过模型拟合优化出MgO的最浸出条件,硫酸质量分数37.39%,反应时间为1.85 h,反应温度为80℃,在此条件下的MgO浸出率达到54.43%。The effects of sulfuric acid leaching efficiency of Ni-Fe tailings are investigated by using response surface methodology（RSM） designed by Box-Behnken. To obtain the leaching behavior, the reaction factors, including sulfuric acid concentration, reaction time and reaction temperature are studied. Based on the obtained experimental data, a response surface quadratic model （RSM） is established by using the software of Design-Expert 7. 1. The RSM model is significant （R^2 = 0. 926 8, Adj R^2 = 0. 832 6）, which implies that this model agreed well with the experimental data and the most significant factor is temperature. But the interaction of these three factors is insignificant. Concentration- Temperature is more beneficial to Ni-Fe tailings＇ leaching rate than Sulfuric acid concentration-Time. And the contour plot indicates that the optimum leaching rate of MgO, which is 54.43 %, could be obtained under the following condition： 37. 39% of sulfuric acid concentration, 1.85 h of reaction time and 80℃ of reaction temperature at.

关 键 词：硫酸浸出 镍铁尾矿 响应面法 

分 类 号：X705[环境科学与工程—环境工程]