Rare earth oxide acid dissolution grouping method

• Main Authors: ZHAO JUNFENG, YU DINGKUN, DONG TAO, ZENG HONGSHENG, YANG SHAOHUA, SHAO ZONGXIANG, LI YANFU, HUANG ZHENGRONG, FAN ZUOJUN, LEI XINGGUO, WU JIANHUI
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2022
• 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 provides a rare earth oxide acid dissolution grouping method, and belongs to the field of rare earth hydrometallurgy. Comprising the following steps that a rare earth oxide raw material, water and first inorganic acid are mixed for first acid dissolution, first filter residues are obtained, and the concentration of hydrogen ions in the first inorganic acid is 1 mol/L; the first filter residues and second inorganic acid are mixed for second acid dissolution, second filter residues are obtained, and the concentration of hydrogen ions in the second inorganic acid is 3 mol/L; the second filter residues and third inorganic acid are mixed for third acid dissolution, third filter residues are obtained, and the concentration of hydrogen ions in the third inorganic acid is 5 mol/L. According to the method, inorganic acids with different concentrations are used for controlling acid dissolution, the rare earth elements are grouped in the acid dissolution process, and the rare earth elements are grouped acc