Investigation of Cadmium and Cobalt Behavior Mechanism During Purification of a Synthetic Zinc Sulfate Electrolyte Enhanced by Ultrasound

Due to the presence of impurity ions, the current efficiency of zinc electrowinning is reduced, and the quality of zinc products is affected. Therefore, before zinc production, impurity ions must be removed from the electrolyte. Zinc powder cementation is the most commonly used purification method,...

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Bibliographic Details
Published in:JOM (1989) 2023-09, Vol.75 (9), p.3663-3673
Main Authors: Liao, Tianqi, Li, Jing, Zhang, Libo
Format: Article
Language:English
Subjects:
Cadmium
Cavitation
Cementation
Chemistry/Food Science
Cobalt
Current efficiency
Earth Sciences
Electrolysis
Electrolytes
Engineering
Environment
Experiments
Impurities
Metallurgy
Physics
Purification
Raw materials
Scanning electron microscopy
Scientific imaging
Technical Article
Ultrasonic imaging
Voltammetry
Work stations
X ray photoelectron spectroscopy
Zinc
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Summary:Due to the presence of impurity ions, the current efficiency of zinc electrowinning is reduced, and the quality of zinc products is affected. Therefore, before zinc production, impurity ions must be removed from the electrolyte. Zinc powder cementation is the most commonly used purification method, which has problems with agglomeration and wrapping. These problems cause fluctuations in the purification effect and poor adaptability. In this article, ultrasound was introduced into the zinc powder cementation purification process, strengthening it, so that a deeper purification effect was obtained. Electrochemical experiments were used to reveal the electrochemical behavioral process of ultrasonic-enhanced purification. The kinetics of the was explored, and it was found that the activation energy under ultrasound conditions was lower, which is conducive to the occurrence of deep purification. Through XRF, XRD, SEM–EDS, XPS, and other characterization methods, the behavior of the ultrasound purification process was analyzed. Ultrasonic-enhanced zinc powder cementation purification is indeed a method that can achieve deep purification, and can meet the strict purification requirements due to increasingly complex mineral raw materials and electrolysis processes.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-023-05881-9