METHOD AND SYSTEM FOR TREATMENT OF RARE EARTH CONCENTRATE

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A method and system for treatment of rare earth concentrate. The method comprises : (1) mixing rare earth concentrate with concentrated sulfuric acid to obtain a mixed slurry and a first fluorine-containing gas; (2) mixing the mixed slurry with an initiator liquid for acidolysis treatment to obtain clinker and a second fluorine-containing gas; (3) mixing the clinker with water and performing leaching treatment to obtain a leach slurry; and (4) performing solid-liquid separation on the leach slurry to obtain a filtrate and leach residues, and for the leach residues, returning to step (2) to perform acidolysis treatment.