基于RSM的难处理氧化铜矿酸浸试验研究  

Experimental Study on Acid Leaching of A Copper Oxide Based on RSM Model

作　　者：代宗 方建军 张琳[1,2] 赵敏捷 张铃[1,2] 郑润浩 DAI Zong;FANG Jian-jun;ZHANG Lin;ZHAO Min-jie;ZHANG Ling;ZHENG Run-hao(State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming 650093,China;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming 650093,China)

机构地区：[1]省部共建复杂有色金属资源清洁利用国家重点实验室,昆明650093 [2]昆明理工大学国土资源工程学院,昆明650093

出　　处：《硅酸盐通报》2018年第8期2378-2384,2390,共8页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51364017)

摘　　要：对云南某地难处理氧化铜矿进行了酸浸回收铜的试验研究。首先对原矿进行多元素分析、物相分析、XRD和XPS表征,确立了酸浸的试验方案。为考察各因素之间的交互作用,优化浸出条件,采用Design-Expert 8.0软件设计4因素5水平CCD响应曲面模型,建立了硫酸浓度、液固比、磨矿细度和浸出时间对铜的浸出率影响的多元二次回归方程模型。结果表明:硫酸浓度和磨矿细度对铜的浸出率影响极显著,液固比、浸出时间和液固比与细度的交互作用对铜的浸出率影响显著,其余不显著。响应曲面优化结果表明:在较低耗酸和较低磨矿细度的条件下(硫酸浓度13.23%,液固比2.47∶1,磨矿细度39.68%,浸出时间为118.8 min),可获得铜浸出率为91.15%,与验证实验中铜的平均浸出率90.83%相比,相对误差为0.32%,表明模型准确,优化方案可靠。The experimental study on the recovery of copper from the refractory copper oxide ore from Yunnan was carried out by acid leaching.About refractory copper oxide ore,by elemental analysis,XRD and XPS characterization and manganese content phase analysis,an experimental scheme for acid leaching has been established.In order to find out the interaction between the factors and optimize the leaching conditions,the multivariate quadratic regression models charactering the effects of factors such as acid concentration,liquid-solid ratio,grinding fineness,leaching time and their interactions on leaching efficiency were studied with the aid of the response surface methodology(RSM)based on central composite design(CCD)by Design-Expert 8.0.The results show that the effect of sulfuric acid concentration and grinding fineness on the leaching rate of copper is very significant,the liquid solid ratio,leaching time and the interaction between liquid-solid ratio and fineness has a significant effect on the leaching rate of copper,and the rest is not significant.The response surface optimization results show that in a relatively low acid concentration and grinding fineness(acid concentration 13.23%,liquid-solid ratio 2.47-1,grinding fineness 39.68%less than 0.074 mm,leaching time 118.8 min),the copper leaching rate was 91.15%,compared with the average leaching rate of copper in experiment 90.83%,the relative error is 0.32%,which indicates that the model is accurate and the optimization scheme is reliable.

关 键 词：硅孔雀石 结合氧化铜 硫酸浸出 响应曲面法 

分 类 号：TK09[动力工程及工程热物理]