METHOD OF RECOVERING RARE-EARTH METALS FROM ORTITOVYKh ORES

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Method of recovering rare-earth metals from ortitovykh ores, consisting of stages of enrichment of, ore grinding, its treatment nitric acid, characterized in that ore crushed to particle size of not more than 0.8 mm, ore is treated with 4-10 n nitric acid in the amount of from 0.55 to 1 from stoichiometric coefficient of, at temperature 75-100 ° with during time from 20 to 180 minutes.