On the cementation purification of zinc solutions
https://doi.org/10.17073/0021-3438-2024-4-11-21
Abstract
The article focuses on researching the technology of cementation purification of zinc sulfate solutions from impurities that adversely affect the electrolysis of zinc. The purpose of this work is to explore new approaches for deep cementation purification of solutions, aimed at reducing the consumption of zinc dust and activating additives (antimony and copper compounds) in the technological process, while improving the quality of the purified solution by decreasing the content of cobalt, nickel, and cadmium in the solution supplied for zinc electrolysis. In this study, a new technology for the cementation purification of industrial solutions was developed, which includes the following stages of impurity removal using zinc dust: preliminary purification stage to remove copper to a concentration of 90–110 mg/L; co-precipitation of copper, cadmium, cobalt, and nickel with the addition of antimony trioxide; deep purification of the solutions from all impurities remaining after the first stage. The purification process was conducted under the following conditions: the preliminary deposition took place at a temperature of 50 °C, with a duration of 30 min and a zinc dust consumption of 0.2–0.4 g/L; the first purification stage occurred at a temperature of 80 °C, for a duration of 1 h, with a zinc dust consumption of 2–3 g/L, and an antimony dosage of 3–6 mg/L; the second purification stage was carried out at a temperature of 75–80 °C, for a duration of 1 h, with a zinc dust consumption of 2–3 g/L, and dosages of copper sulfate and antimony at 50 mg/L and 2–3 mg/L, respectively.
About the Authors
A. V. Kolesnikov
Chelyabinsk State University
Russian Federation
Russian Federation
Alexander V. Kolesnikov – Dr. Sci. (Eng.), Head of the Department of analytical and physical chemistry
129 Bratiya Kashiriny Str., Chelyabinsk 454001
E. I. Ageenko
Chelyabinsk State University
Russian Federation
Russian Federation
Egor I. Ageenko – Senior Lecturer at the Department of analytical and physical chemistry
129 Bratiya Kashiriny Str., Chelyabinsk 454001
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For citations:
Kolesnikov A.V., Ageenko E.I. On the cementation purification of zinc solutions. Izvestiya. Non-Ferrous Metallurgy. 2024;(4):11-21. https://doi.org/10.17073/0021-3438-2024-4-11-21
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