Method for reduction, evaporation and concentration treatment of wastewater produced by acidic precipitation of vanadate-leaching solution

The invention relates to a method for reduction, evaporation and concentration treatment of wastewater produced by acidic precipitation of a vanadate-leaching solution and belongs to the fields of chemical engineering and metallurgy. The invention aims to solve the technical problem of providing the...

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Hauptverfasser:	WANG YING, RAN JUN, YAN JIE, WEI LINSEN, GAN XINDE, WAN LONGFEI, LI QIANWEN, MU XIAOLING, PENG YICUN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AMMONIA CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM COMPOUNDS THEREOF CYANOGEN GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INORGANIC CHEMISTRY METALLURGY TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	The invention relates to a method for reduction, evaporation and concentration treatment of wastewater produced by acidic precipitation of a vanadate-leaching solution and belongs to the fields of chemical engineering and metallurgy. The invention aims to solve the technical problem of providing the method for reduction, evaporation and concentration treatment of wastewater produced by acidic precipitation of the vanadate-leaching solution. The method comprises the following steps: a, performing sand filtration on the wastewater produced by acidic precipitation of the vanadate-leaching solution through residue obtained after extracting aluminum to obtain a filtrate A; b, adding a composite settling agent and a reducing agent into the filtrate A and regulating the pH value to be 7-8 and filter-pressing to obtain a filtrate B and a solid; evaporating and concentrating the filtrate B, cooling and crystallizing, and separating out sodium sulfate and ammonium sulfate. According to the method provided by the invent