Method for leaching uranium in radioactive alkali residues

• Main Authors: HUANG YONGCHUN, HU EMING, DENG HUA, YU TAO, CHEN PENG, WANG QINGLIANG, ZHAO NING
• Format: Patent
• Language: Chinese; English
• Published: 28.09.2016
• Subjects: 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

The invention provides a method for leaching uranium in radioactive alkali residues. The radioactive alkali residues are dry alkali residues which are finally formed after uranium-containing waste residues obtained through precipitation under alkaline conditions are filtered and forged at 800 DEG C in the uranium-containing wastewater treatment process. Multi-stage reflux dissolving leaching is adopted in the method, the method mainly includes the steps of alkali residue circulating dissolving, filtering, undissolved residue washing, filtering, undissolved residue first-stage leaching, clarifying, undissolved residue second-stage leaching, filtering, leached residue first-stage washing, clarifying, leached residue second-stage washing and filtering, leached tailings S6 are obtained after filtering, and the leached tailings S6 are subjected to neutralizing treatment and are conveyed to a disposal site. The method for leaching uranium in the radioactive alkali residues is simple in technical process, process so