Method for improvement of low-grade ore solubility and removal of impurities in feed liquid

The invention relates to a method for improvement of low-grade ore solubility and removal of impurities in feed liquid. The method includes: adding acids to adjust pH to 0.5, adding BaCl2 for removing SO4 after dissolution of low-grade rare earth ore, adding alkalis to adjust pH to 4.0-5.0, adding f...

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Bibliographische Detailangaben
Hauptverfasser:	ZHUANG HUI, HU GUHUA, ZHANG LIANGJIU, QIN WENZHONG, KUANG TAO, WEI SHIQIANG, PENG XINLIN, JIANG CHAOCHAO, XU XUSHENG, HUANG HUAYONG, YANG DUOYAN, HU ZHENGUANG, LU JIEZHU, LI FEILONG, YANG GUILIN, JIANG ZEZUO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention relates to a method for improvement of low-grade ore solubility and removal of impurities in feed liquid. The method includes: adding acids to adjust pH to 0.5, adding BaCl2 for removing SO4 after dissolution of low-grade rare earth ore, adding alkalis to adjust pH to 4.0-5.0, adding flocculant for precipitation after removal of iron and aluminum impurities, ageing, filter pressing and separating to obtain feed liquid of the rare earth ore, wherein rare earth element yield is larger than or equal to 97%, Fe2O3 content is smaller than or equal to 0.03%, and Al2O3 content is smaller than or equal to 1.0%. The method for improvement of low-grade ore solubility and removal of the impurities in the feed liquid has the advantages that low-grade ore solubility can be remarkably improved while content of impurities in the feed liquid is reduced, availability of the low-grade rare earth ore is improved, waste of rare earth resources is avoided, and high economic benefits and social benefits are achieved.