Cleaning method for acid vanadium precipitation scaling substance in process of extracting vanadium from vanadium slag

• Main Authors: YE LU, CHEN YAN, SHEN BIAO, LI MING, HE WENYI
• Format: Patent
• Language: Chinese; English
• Published: 20.03.2018
• Subjects: CHEMISTRY; CLEANING; CLEANING IN GENERAL; 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; PERFORMING OPERATIONS; PRETREATMENT OF RAW MATERIALS; PREVENTION OF FOULING IN GENERAL; 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; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a cleaning method for acid vanadium precipitation scaling substance in a process of extracting vanadium from vanadium slag and belongs to the field of vanadium oxide extracting. The technical problem to be solved by the invention is to provide the cleaning method for the acid vanadium precipitation scaling substance in the process of extracting vanadium from the vanadium slag. The method is to clean with alkali liquor. The method is capable of cleaning the scaling substance generated from the production equipment such as a heat exchanger, a depositing tank and the likeeffectively, high in cleaning efficiency and low in cost; moreover, vanadium in an alkaline vanadium containing solution obtained after cleaned can be recycled through conducting vanadium precipitation once again by a normal acid vanadium precipitation process, so that the purity of V2O5 of the finished products can 98% or above. Compared with the conventional cleaning method, the cleaning methodprovided by the invention