Rare earth materials have an ever growing variety of applications in the modern and hi-tech technology. They apply to many an industry with crucial materials and they provide numerous a customers with benefits. Rare earth materials utilization increasing day-by-day in the worldwide, at the same time the resources is very limited in many countries like Korea.The present general article divided four sorts such as 1) mineral processing of Korean ore deals the gravity; magnetic separation and froth flotation; 2) decomposition and leaching of concentrates included sodium hydroxide fritting; sodium hydroxide hot digestion; hydrochloric acid leaching; 3) separation and purification of rare earth elements in mixed rare earth chloride solution consists reduction and oxidation method; solvent extraction; 4) preparation of rare earth oxide compound from purified elemental rare earth chloride solution having oxalate salt precipitation by reaction crystallization. The last part consists of a summary of the present study.
展开▼
