发明名称 |
PROCEDURE FOR EXTRACTION OF RARE EARTH ELEMENTS FROM PHOSPHO-GYPSUM |
摘要 |
FIELD: metallurgy. ^ SUBSTANCE: procedure consists in leaching phospho-gypsum with solution of sulphuric acid and in dissolving rare earth metals into solution. Prior to leaching phospho-gypsum is washed from phosphorus with water. Phosphorus is washed out in a closed cycle with dissolving of phosphorus into solution and its successive utilisation; it is run through a layer of carbonate waste and is returned to a reverse cycle of phospho-gypsum washing with water depleted of phosphorus. Phospho-gypsum is leached with solution of sulphuric acid at its concentration from 3 to 250 g/l. Rare earth metals are extracted from leaching solution by their concentration on cation exchanger, by their removing from cation exchanger with production of a commodity regenerate and by their return into the reverse cycle of leaching water solution depleted of rare earth elements. ^ EFFECT: repeated utilisation of sulphuric acid solution at treatment of phospho-gypsum, obtaining maximum concentrated solution of rare earth metals cleared from impurities, reduced amount of phospho-gypsum wastes and their reclamation in building. ^ 2 ex |
申请公布号 |
RU2416654(C1) |
申请公布日期 |
2011.04.20 |
申请号 |
RU20090141641 |
申请日期 |
2009.11.10 |
申请人 |
ZAKRYTOE AKTSIONERNOE OBSHCHESTVO "ROSSIJSKIE REDKIE METALLY" |
发明人 |
ZOTS NIKOLAJ VLADIMIROVICH;GLUSHCHENKO JURIJ GRIGOR'EVICH;SHESTAKOV SERGEJ VLADIMIROVICH;KOZYREV ALEKSANDR BORISOVICH;NECHAEV ANDREJ VALER'EVICH |
分类号 |
C22B3/04;C22B59/00 |
主分类号 |
C22B3/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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