Method for extracting vanadium from chrome vanadium slag

The invention discloses a method for extracting vanadium from chrome vanadium slag. The method is characterized by comprising the steps that under the primary roasting condition, the chrome vanadium slag, sulfuric acid solutions and sodium sulfate are primarily roasted, and under the secondary roast...

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Bibliographische Detailangaben
Hauptverfasser:	JIANG LIN, WU ZHENXIU, GAO GUANJIN, XIAO LIANG, PENG YICUN
Format:	Patent
Sprache:	chi ; 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 discloses a method for extracting vanadium from chrome vanadium slag. The method is characterized by comprising the steps that under the primary roasting condition, the chrome vanadium slag, sulfuric acid solutions and sodium sulfate are primarily roasted, and under the secondary roasting condition, products generated after primary roasting are secondarily roasted; products obtained after secondary roasting are leached; the primary roasting condition comprises the roasting temperature of 100 DEG C to 500 DEG C and the roasting time of 20 minutes to 120 minutes; the secondary roasting condition comprises the roasting temperature of 700 DEG C to 950 DEG C, and the roasting time of 60 minutes to 180 minutes. According to the method, the vanadium can be selectively extracted from the chrome vanadium slag, the operation is easy, few steps exist, and the method is particularly suitable for industrialization production. The leaching rate of the vanadium reaches more than 91 percent by weight.