In this work, a 30 mm diameter pulsed disc and doughnut solvent extraction column was used for impurities removal from nickel cobalt complex hydroxide acid solution by solvent extraction. The effects of dispersed phase velocity, continuous phase velocity and pulse intensity on drop diameter, dispersed phase holdup and mass transfer were investigated. The results show that the drop size decreases gradually, and the dispersed phase holdup decreased initially and then increased with the increase of pulse intensity. The dispersed phase holdup increases with the increase of dispersed phase velocity but is independent of the continuous phase velocity. The experimental data of this study are predicted by correlations with regressed parameters. The average absolute relative error of drop size and dispersed phase holdup were 10.07 % and 18.28 %. With the increase of pulse intensity, the extraction efficiency of impurities decreased firstly and then increased. The number of mass transfer units and the height of mass transfer unit were calculated. The trend of number of mass transfer units of impurities are similar to extraction efficiency. Mass transfer results indicate that pulsed disc and doughnut column can be applied to the nickel cobalt complex hydroxide acid solution-P204/kerosene system.

中文翻译：

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使用脉冲盘和环形柱从镍钴复合氢氧化物酸性溶液中去除杂质

在这项工作中，使用直径 30 mm 的脉冲盘和环形溶剂萃取柱通过溶剂萃取从镍钴复合氢氧化物酸溶液中去除杂质。研究了分散相速度、连续相速度和脉冲强度对液滴直径、分散相持留率和传质的影响。结果表明，随着脉冲强度的增加，液滴尺寸逐渐减小，分散相持留率先减小后增大。分散相持留量随着分散相速度的增加而增加，但与连续相速度无关。本研究的实验数据是通过与回归参数的相关性来预测的。液滴尺寸和分散相含率的平均绝对相对误差分别为10.07%和18.28%。随着脉冲强度的增加，杂质的萃取效率先降低后升高。计算传质单元的数量和传质单元的高度。杂质传质单位数的变化趋势与萃取效率相似。传质结果表明脉冲盘和环形柱可应用于镍钴复合氢氧化物酸溶液-P2O4/煤油体系。