Method for preparing thorium sulfate by utilizing monazite excellent molten slag

• Main Authors: LIU HUIWU, WANG GUISHUO, CHENG HAO, ZHANG CHENGTIAN, LIU KANG, LIU ZHONGCHEN, XIANG QIULIN, SU XUEBIN, HUANG YONG, LIANG GENGYU
• Format: Patent
• Language: Chinese; English
• Published: 12.09.2023
• 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 provides a method for preparing thorium sulfate by utilizing monazite excellent molten slag, and relates to the technical field of hydrometallurgy. According to the method, the monazite excellent molten slag is leached, the leaching rate of uranium, thorium and rare earth is high, and leached ore pulp is obtained; mixing the leached ore pulp with a polyacrylamide solution, and carrying out solid-liquid separation to obtain an extraction stock solution; the extraction stock solution is extracted with a first solvent, iron is removed while uranium is recycled, and thorium-containing raffinate is obtained; the thorium-containing raffinate is subjected to second solvent extraction, thorium and rare earth are efficiently separated, and a thorium-loaded organic phase and rare earth-containing raffinate are obtained; and carrying out crystallization back extraction on the thorium-loaded organic phase to obtain thorium sulfate. The method is easy to operate, good in uranium, thorium and rare earth separ