Process connection method for extracting uranium by two-step ion exchange method

• Main Authors: CAO LINGHUA, ZHENG YING, NIU YUQING, ZHOU ZHIQUAN, ZHI MEIFENG, ZHAO FENGQI, SHU ZUJUN, CAO XIAOHAO, YE KAIKAI, REN YAN
• Format: Patent
• Language: Chinese; English
• Published: 17.04.2020
• 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 belongs to the technical field of uranium hydrometallurgy, and particularly relates to a process connection method for extracting uranium from a sulfuric acid system by adopting two-stepion exchange. The method comprises the following steps that (1) the first-step ion exchange is carried out to extract uranium in an acidic sulfuric acid leaching solution by adopting a weak alkalineresin, and the saturated resin loaded with uranium is obtained; (2) the saturated resin loaded with uranium obtained in the step (1) is washed with water to obtain a washed resin; (3) the washed resinis leached; (4) the leaching solution in the step (3) is subjected to periodic detection; (5) the leached resin is used for leaching uranium by adopting a mixed solution of sodium bicarbonate and sodium carbonate to obtain a one-step leaching qualified liquid; (6) the pH value of the one-step leaching qualified liquid is adjusted through NaOH solution; and (7) two-step adsorption is carried out by adopting a strong alkalin