期刊
JOURNAL OF APPLIED ELECTROCHEMISTRY
卷 52, 期 10, 页码 1535-1549出版社
SPRINGER
DOI: 10.1007/s10800-022-01725-7
关键词
Magnesium; Magnesium oxide; Electrolytic process; Metal cathode; Copper
资金
- Basic Research Projects of the Korea Institute of Geoscience and Mineral Resources (KIGAM) - Ministry of Science and ICT of Korea [22-3803, 22-3212]
- National Research Council of Science & Technology (NST), Republic of Korea [22-3803, 22-3212] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
An environmentally friendly and effective molten salt electrolysis process using a copper (Cu) cathode was developed for producing magnesium (Mg) metal from magnesium oxide (MgO). The influence of various factors on the current efficiency was investigated, and the microstructure of the Al2O3 crucible containing Mg alloy was analyzed. The results demonstrate the feasibility of this novel electrolytic process for producing Mg metal.
An environmentally friendly and effective molten salt electrolysis process using a copper (Cu) cathode was developed for producing magnesium (Mg) metal from magnesium oxide (MgO). In this study, the influence of electrolysis temperature, concentration of Mg in the Mg-Cu alloy, size of the Cu pellets for the cathode, and cathodic current density on the current efficiency was investigated. In addition, the microstructure of the alumina (Al2O3) crucible containing Mg alloy was analyzed. For the experiments, an average current of 1.42-1.63 A was applied to the electrolysis cell containing MgO in magnesium fluoride (MgF2)-lithium fluoride (LiF)-potassium chloride (KCl) molten salt using Cu cathode and graphite (C) anode at 1043-1173 K for 9.50-27.5 h in an argon (Ar) gas atmosphere. Under certain conditions, a current efficiency of 72.5-92.0% was obtained with the production of 9.25-14.2 mass% Mg-Cu alloys consisting of Cu (Mg) and MgCu2. During electrolysis, magnesium aluminum oxide was formed at the surface of the Al2O3 crucible and its thickness was less than 28 mu m. Therefore, the results of this study demonstrate the feasibility of the novel electrolytic process using a Cu cathode for producing Mg metal from MgO. [GRAPHICS] .
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