Recent Progress in Molten Salt Electrolysis Using a Liquid Metal Cathode and Vacuum Distillation for the Production of Ultra-High-Purity Mg Metal from MgO

2021 ◽  
Vol MA2021-02 (60) ◽  
pp. 1784-1784
Author(s):  
Jungshin Kang ◽  
Tae-Hyuk Lee ◽  
Hyeong-Jun Jeoung ◽  
Dong-Hee Lee ◽  
Young Min Kim ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Molten Salt ◽  
High Purity ◽  
Vacuum Distillation ◽  
Recent Progress ◽  
Molten Salt Electrolysis ◽  
Ultra High Purity ◽  
Metal Cathode

scholarly journals Investigation of Electrowinning of Mg from MgO Using a Liquid Metal Cathode in MgF2-CaF2-NaF or MgF2-LiF Molten Salt

2021 ◽  
Vol 59 (6) ◽  
pp. 392-403
Author(s):  
Tae-Hyuk Lee ◽  
HyungKyu Park ◽  
Jin-Young Lee ◽  
Young Min Kim ◽  
Jungshin Kang
Keyword(s):  
Liquid Metal ◽  
Molten Salt ◽  
Lithium Fluoride ◽  
Vacuum Distillation ◽  
Direct Reduction ◽  
Mg Alloys ◽  
Magnesium Fluoride ◽  
Molten Salt Electrolysis ◽  
Metal Cathode ◽  
Environmentally Sound

A novel magnesium (Mg) production process utilizing an electrolytic method was investigated for the direct reduction of magnesium oxide (MgO). Electrolysis of MgO was carried out with an applied voltage of 3.0 V using a copper (Cu), silver (Ag), or tin (Sn) cathode and carbon (C) or platinum (Pt) anode in magnesium fluoride (MgF2)−calcium fluoride (CaF2)−sodium fluoride (NaF) at 1273 K or MgF2− lithium fluoride (LiF) at 1083−1093 K. After the electrolysis of MgO in MgF2−CaF2−NaF molten salt, Mg alloys such as Mg2Cu, Cu2Mg, or Mg2Sn phases were produced with current efficiencies of 75.8−85.6% when the concentration of Mg in Mg alloys was 9.1−14.6 mass%. In addition, when the electrolysis of MgO was conducted in MgF2–LiF molten salt, Mg alloys such as Mg2Cu or AgMg phase were produced with current efficiencies of 76.2−81.7% when the concentration of Mg in the Mg alloys was 12.5−13.2 mass%. In addition, to produce high-purity Mg metal from Mg alloys, vacuum distillation was conducted. When vacuum distillation was conducted at 1100−1400 K for a duration of 5 h, the concentration of Mg in the Mg alloys feed decreased from 30.2−34.1 mass% to 0.64−1.75 mass%, and Mg metal with a purity of 99.998−99.999% was obtained under certain conditions. Therefore, the molten salt electrolysis using liquid metal cathode (MSE-LMC) process developed here is feasible for the direct reduction of MgO using an effective and environmentally sound method.

Molten Salt Electrolysis of Magnesium Oxide Using a Liquid–Metal Cathode for the Production of Magnesium Metal

2020 ◽  
Vol 51 (6) ◽  
pp. 2993-3006
Author(s):  
Tae-Hyuk Lee ◽  
Toru H. Okabe ◽  
Jin-Young Lee ◽  
Young Min Kim ◽  
Jungshin Kang
Keyword(s):  
Liquid Metal ◽  
Molten Salt ◽  
Magnesium Oxide ◽  
Molten Salt Electrolysis ◽  
Magnesium Metal ◽  
Metal Cathode

Preparation of High-Purity Titanium by Molten-Salt Electrolysis Process

2011 ◽  
Vol 284-286 ◽  
pp. 1477-1482 ◽  
Author(s):  
Tie Chui Yuan ◽  
Qi Gang Weng ◽  
Zhi Hui Zhou ◽  
Jian Li ◽  
Yue Hui He
Keyword(s):  
Molten Salt ◽  
Current Density ◽  
High Purity ◽  
Titanium Sponge ◽  
Cathode Current Density ◽  
Titanium Concentration ◽  
Titanium Plate ◽  
Molten Salt Electrolysis ◽  
Cathode Current ◽  
Purity Titanium

Titanium sponge is used as anode, titanium plate as cathode and NaCl-KCl-TiClx molten salt as electrolyte, to prepare high purity titanium by molten-salt electrolysis at 900~980°C. The effects of feeding TiCl4 temperature, electrolytic temperature, soluble titanium concentration and cathode current density on the content of impurities of cathode products have been studied. The results show that the impurities in product can be controlled when the temperature of feeding and electrolyte is higher. The final product with different morphology and degree of purity can be prepared by controlling the soluble titanium concentration and cathode current density.

Technology of Molten Salt Electrolysis of Magnesium Chloride

2010 ◽  
Vol 654-656 ◽  
pp. 799-802 ◽  
Author(s):  
Mi Seon Choi ◽  
Chang Kyu Lee ◽  
Go Gi Lee ◽  
Sung Koo Cho ◽  
Jae Young Jung
Keyword(s):  
Free Surface ◽  
Energy Consumption ◽  
Sodium Chloride ◽  
Molten Salt ◽  
High Purity ◽  
Magnesium Chloride ◽  
Electrolytic Production ◽  
Molten Salt Electrolysis ◽  
Polar Cell ◽  
Chlorine Gas

The electrolytic production of magnesium from magnesium chloride containing sodium chloride-rich melts has been studied using mono-polar cell, where originally designed in consideration of current efficiency and energy consumption. The magnesium was formed well at the surface of cathode and floated at the free surface of the molten salt, and chlorine gas was generated at the anode without any inverse reaction between the magnesium which is produced electrolysis process. The magnesium was collected about 200 g/hr by operating an optimized mono-polar cell with 500 A for 24 hours. The metallic magnesium produced from this study had a high purity with 99.92 %.

Preparation of high-purity straight silicon nanowires by molten salt electrolysis

2020 ◽  
Vol 40 ◽  
pp. 171-179 ◽  
Author(s):  
Jie Zhang ◽  
Sheng Fang ◽  
Xiaopeng Qi ◽  
Zhanglong Yu ◽  
Zhaohui Wu ◽  
...  
Keyword(s):  
Molten Salt ◽  
Silicon Nanowires ◽  
High Purity ◽  
Molten Salt Electrolysis
Sign in / Sign up

Export Citation Format

Share Document