当前位置: X-MOL 学术Metall. Mater. Trans. B. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Molten Salt Electrolysis of Magnesium Oxide Using a Liquid–Metal Cathode for the Production of Magnesium Metal
Metallurgical and Materials Transactions B ( IF 3 ) Pub Date : 2020-10-19 , DOI: 10.1007/s11663-020-01976-9
Tae-Hyuk Lee , Toru H. Okabe , Jin-Young Lee , Young Min Kim , Jungshin Kang

A novel electrolytic process that uses a liquid–metal cathode was investigated to produce high-purity magnesium (Mg) metal using magnesium oxide (MgO). Electrolysis of MgO in a magnesium fluoride (MgF2)-lithium fluoride (LiF) molten salt was carried out with applied voltages of 2.5 V to 3.0 V at 1053 K to 1083 K using tin (Sn), silver (Ag), or copper (Cu) as the cathode and graphite or platinum (Pt) as the anode. After electrolysis, Mg alloys with Mg2Sn, AgMg, and Cu2Mg phases were produced with current efficiencies of 77.2 to 83.8 pct when the concentration of Mg in the Mg alloys was 11.9 to 12.9 mass pct. For the production of high-purity Mg metal directly from the Mg alloys, vacuum distillation was performed. When vacuum distillation was conducted at 1200 K to 1300 K, the concentration of Mg in the Mg alloys feed decreased from 30.2 to 34.1 mass pct to 0.32 to 1.75 mass pct, and Mg metal with a purity of 99.975 to 99.999 pct was obtained. Therefore, this study demonstrates that the production of high-purity Mg metal through an efficient and environmentally sound method using the electrolysis of MgO is feasible.

中文翻译:

使用液态金属阴极生产金属镁的氧化镁熔盐电解

研究了一种使用液态金属阴极的新型电解工艺,以使用氧化镁 (MgO) 生产高纯度镁 (Mg) 金属。在氟化镁 (MgF2)-氟化锂 (LiF) 熔盐中电解 MgO,使用锡 (Sn)、银 (Ag) 或铜,在 1053 K 至 1083 K 下施加 2.5 V 至 3.0 V 的电压( Cu)作为阴极,石墨或铂(Pt)作为阳极。电解后,当镁合金中镁的浓度为 11.9 至 12.9% 时,具有 Mg2Sn、AgMg 和 Cu2Mg 相的镁合金的电流效率为 77.2 至 83.8%。为了直接从镁合金生产高纯度镁金属,进行了真空蒸馏。当真空蒸馏在 1200 K 至 1300 K 下进行时,镁合金进料中的镁浓度从 30.2 降至 34。1质量%至0.32至1.75质量%,获得纯度为99.975至99.999%的Mg金属。因此,本研究表明,通过使用 MgO 电解的高效且环保的方法生产高纯度 Mg 金属是可行的。
更新日期:2020-10-19
down
wechat
bug