The solubility of magnesium metal and the recombination reaction in the industrial magnesium electrolysis

✍ Scribed by Jan Wypartowicz; Terje Østvold; Harald A. Øye

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 632 KB
• Volume: 25
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(80)80036-3

✦ Synopsis

The soluhility and dispersion of Mg in the systems MgCI,, MgCl,-NaCl and M&I,-KCI has been studied. An extensive study of Mg solubility in MgC1, did not show any influence on the content of MgO or added NaOH or Na,B,O,. At 750°C the solubiiity was found to be 0.16 mol%. The solubihty increased with increasing temperature and dccreased on the addition of NaCl or KCl. In 25mol% NaCL7Smo% MgCI, the solubility was as low as 0.02 mol% at 815°C. The amount of Mg dispersed was found to be negligible with the present experimental sel-up. The results are discussed with reference to the back reaction between Mg and Ci, in the industrial electrolysis. It seems likely that the rate determining step in this reaction is the rate of formation of small metal particles in the melt.