In this article, the cementation of major impurities from zinc sulphate leach solution by the addition of zinc dust was studied by considering different parameters including time, mesh size, and percentage of excess zinc dust. The output obtained from various experiments was utilized for the design of experiments. A multi-level categorical factorial design with a quadratic model was employed during this study. Results were predicted to minimize the concentration of impurity metals in the solution by altering the parameters. Furthermore, these predicted results were validated by performing another experiment. Successfully, it showed that the predicted and experimental data values were close to each other. The predicted optimized values were 40 min, 100% excess zinc dust, and 300 mesh size for copper; 42 min, 100% excess zinc dust, and 300 mesh size for cobalt; 37 min, 100% excess zinc dust, and 300 mesh size for cadmium; and 34 min, 100% excess zinc dust, and 300 mesh size zinc dust for nickel. At these optimized values, the experimental results showed 99.99%, 55.7%, 99.6%, and 76.6% cementation efficiencies for copper, cobalt, cadmium, and nickel respectively. The statistical design of experiments for the effective cementation of impurities corroborates the economic feasibility of optimizing parameters for the proposed process.

在本文中，通过考虑不同的参数，包括时间、筛孔尺寸和过量锌粉的百分比，研究了添加锌粉对硫酸锌浸出液中主要杂质的胶结。从各种实验中获得的输出用于实验设计。在本研究中采用了具有二次模型的多水平分类因子设计。预测结果通过改变参数来最小化溶液中杂质金属的浓度。此外，这些预测结果通过进行另一个实验得到了验证。成功地表明，预测和实验数据值彼此接近。预测的优化值为 40 分钟、100% 过量锌粉和 300 目铜；42 分钟，100% 过量的锌粉，和 300 目尺寸的钴；37 分钟，100% 过量锌粉和 300 目尺寸的镉；和 34 分钟，100% 过量的锌粉和 300 目尺寸的锌粉用于镍。在这些优化值下，实验结果表明，铜、钴、镉和镍的胶结效率分别为 99.99%、55.7%、99.6% 和 76.6%。杂质有效胶结实验的统计设计证实了为所提出的工艺优化参数的经济可行性。