• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Determination of the optimum conditions for the leaching of Cd-Ni residues from electrolytic zinc plant using statistical design of experiments
【24h】

Determination of the optimum conditions for the leaching of Cd-Ni residues from electrolytic zinc plant using statistical design of experiments

机译：用统计实验设计确定电解锌厂中镉镍残留物浸出的最佳条件

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This research is part of a continuing effort to reduce environmental conflicts and occupational hazards of cadmium bearing zinc plant residues(ZPR's)and to break through this problem and recover valuable constituents of the wastes.In this paper,effects of influential factors on extraction efficiencies of Cd,Zn,Ni,Pb and Cu from Cd-Ni filtercake as a major ZPR were investigated.In the view of above,the systematical and analytical evaluation method of Taguchi quality engineering has been applied for the leaching of the Cd-Ni filtercake to evaluate the optimal experimental conditions and hence to achieve the highest leaching performance and the best robustness of quantitation from the least number of trials in a batch laboratory scale.An L_(25)orthogonal array(OA,five factors in five levels)was employed to evaluate the effects of temperature(T=25 35 45 55 and 65°C),acid concentration(C=0.31,0.51,0.82,1.22 and 1.84M),time(t = 15,30,45,60 and 90min),pulp density(S/L= 125,' 142.86' 166.67,200 and 250 g/l)and stirring speed(R = 200,300,400,500 and 800 rpm)on extraction percent of the individual metals.Statistical analysis,ANOVA,was also employed to determine the relationship between experimental conditions and yield levels.The results showed that increasing temperature reduced performance characteristics.Two approaches were taken into consideration for the experiments,i.e.,selective and collective leaching,and then the optimum conditions were sought for each considered approach.The experimental results for selective leaching showed that under optimal leaching conditions(T:45 °C,C:0.82 M,t:60min,(S/L):250 g/l,R:400rpm),the extraction of cadmium,zinc,nickel,lead and copper were 90.29,96.86,8.66,0.11 and 0.01,respectively.However,the same results for optimal collective leaching conditions(T:25 °C,C:1.22M,t:60min,(S/L):142.86 g/l,R:200rpm)showed that the extraction of Cd,Zn and Ni could be over 95%,with negligible dissolution of lead and copper.
机译：这项研究是不断进行的工作的一部分，以减少含镉的锌植物残留物（ZPR's）的环境冲突和职业危害，并突破这一问题并回收废物的有价值的成分。本文，影响因素对金银花提取效率的影响。以Cd-Ni滤饼中的Cd，Zn，Ni，Pb和Cu为主要ZPR进行了研究。鉴于以上观点，田口质量工程的系统和分析评价方法已应用于Cd-Ni滤饼的浸出。评估最佳实验条件，从而从最少的批次实验室规模的试验中获得最高的浸出性能和最佳的定量鲁棒性。采用L_（25）正交阵列（OA，五个级别的五个因子）评估温度（T = 25 35 45 55和65°C），酸浓度（C = 0.31,0.51,0.82、1.22和1.84M），时间（t = 15,30,45,60和90min）的影响，纸浆密度（S / L = 125，'142.86'166.67,20 0和250 g / l）以及搅拌速度（R = 200,300,400,500和800 rpm）对每种金属的萃取率。统计分析，方差分析，还确定了实验条件与产率水平之间的关系。实验中考虑了选择性浸出和集体浸出两种方法，然后为每种考虑的方法寻找最佳条件。选择性浸出的实验结果表明，在最佳浸出条件下（T：45） °C，C：0.82 M，t：60min，（S / L）：250 g / l，R：400rpm），镉，锌，镍，铅，铜的萃取率分别为90.29,96.86,8.66,0.11和0.01然而，最佳集体浸出条件（T：25°C，C：1.22M，t：60min，（S / L）：142.86 g / l，R：200rpm）的相同结果表明，Cd的萃取锌和镍的含量可以达到95％以上，而铅和铜的溶解程度可忽略不计。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号