Method for deeply removing uranium through extraction method

• Main Authors: NIU YUQING, ZHI MEIFENG, ZHOU ZHIQUAN, KANG SHAOHUI, ZHAO FENGQI, SHU ZUJUN, WANG HAO, ZHANG JIAYU
• Format: Patent
• Language: Chinese; English
• Published: 01.07.2022
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to the field of hydrometallurgy, in particular to a deep uranium removal method through an extraction method. The method comprises the following steps: 1, carrying out multi-stage counter-current extraction on uranium-containing wastewater of a nitric acid system by adopting an organic phase containing trialkylphosphine oxide and n-decanol to obtain a loaded organic phase; 2, washing the loaded organic phase with a washing agent, returning the washing liquid to the first stage of the extraction process, and merging the washing liquid into the extraction stock solution for use; step 3, performing back extraction on the washed loaded organic phase by adopting a back extraction agent to prepare back extraction liquid of uranium, and returning the obtained lean organic phase to the extraction process for recycling; and the obtained raffinate water phase reaches the discharge standard. The uranium-containing wastewater of the high-impurity nitric acid system is deeply treated by adopting an e