Preparation Of Magnesium And Aluminum-Magnesium Alloys By Direct Electrodeoxidation In Low Temperature Molten Salt

Metallic Mg and Al-Mg alloys are widely used in aerospace, aviation, metallurgy, automobile,3C Industry and so on because of its light and other excellent performance. However, the Mg and Al-Mg alloys industry consumed abundant energy and polluted environments, with high energy resume, high costs and poisonous liberation of gas. The technology and craft of low-energy consumption and friendly to environment for preparing Mg and Al-Mg alloys have always been explored. It is concerned by Mg and Al-Mg alloys industry and academics.In this paper, preparation of magnesium and aluminum-magnesium alloys in low temperature molten salts by direct electrochemical reduction (FFC) are studied, where direct electrochemical reduction mechanism of MgO are investigated; Influence factors of craft of preparation and electrolysis, liquid conductor on electrolysis are investigated; and preparation of aluminum-magnesium alloys in low temperature molten salts by direct electrochemical reduction are studied.The results indicated that the reduction mechanism of solid MgO was one step from Mg2+â†'Mg. The sintering temperature and sintering time are influence factors to the preparation of MgO, and the appropriate sintered conditions were at1100℃～1200℃and3h-6h sinter. Temperature of molten salt and content of CaCl2are influence factors to electrolysis results, and high temperature and content of CaCl2accelerates the rate of reaction. The liquid Al-Mg alloys are of advantage to low temperature magnesium electrolysis. Aluminum-magnesium alloys can be preparated by electrolysis, and the appropriate sintered conditions of Al2O3-MgO were at1300℃and8h sinter.