GREEN AND ENVIRONMENTALLY FRIENDLY METHOD FOR PRODUCING MAGNESIUM BY MEANS OF ALUMINOTHERMIC REDUCTION

• Main Authors: WU, Xi, LI, Pingceng, ZHAO, Yue, WANG, Naiyuan
• Format: Patent
• Language: Chinese; English; French
• Published: 21.03.2024
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A method for producing magnesium by means of aluminothermic reduction, the method comprising the following steps: mixing, at a certain ratio until uniform, magnesium oxide and an aluminum powder that have particle sizes meeting standards; pressing same into clumps after uniform mixing, and adding same to a vacuum feeding device; heating same in a vacuum environment and maintaining the temperature, wherein the material clumps are heated in a high-temperature material pipe to undergo a reduction reaction so as to generate magnesium vapor and a solid reduction slag; and continuing heating same in the vacuum environment and maintaining the temperature, so as to make the solid reduction slag generate magnesia-alumina spinel. In the method for producing magnesium by means of aluminothermic reduction, heating processes at different temperatures are respectively carried out in the same reaction container at different time periods, and two products, i.e. high-purity crude magnesium and magnesia-alumina spinel, are res