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Determination of the optimum conditions for the cementation of cadmium with zinc powder in sulfate medium |
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| Authors: | Mohammad Sadegh Safarzadeh Davood Moradkhani Mehdi Ojaghi Ilkhchi |
| Affiliation: | aDepartment of Materials and Metallurgical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran bR&D Center, Iranian Zinc Mines Development Company, Zanjan, Iran cFaculty of Engineering, Zanjan University, Zanjan, Iran dFaculty of Materials Engineering, Sahand University of Technology, Tabriz 51335-1996, Iran |
| Abstract: | The orthogonal array design has been used to determine the optimum conditions for the cementation of cadmium from a synthetic zinc sulfate solution and hence to achieve the highest cementation efficiency and the best robustness of the quantitation from the least number of trials in a laboratory scale. Cementation was performed using zinc powder. The orthogonal array L9 (34) that comprises four parameters at three levels was chosen. The parameters and their levels were as: zinc powder quantity (Z): 1, 1.2 and 1.5 times of stoichiometric quantity of cadmium; time (t): 4, 8 and 12 min; temperature (T): 25, 35 and 45 °C and zinc powder particle size distribution (R): nos. 1–3. The ultimate optimum cementation conditions were found to be Z1 (equal to stoichiometric quantity of cadmium), T1 (25 °C), R3 (no. 3) and t1 (4 min). Under these conditions, cementation percentages for cadmium and nickel were 95.83% and 6.63%, respectively. |
| Keywords: | Cadmium Cementation Orthogonal array Particle size distribution |
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