Recovery method of rare earth elements in ionic rare earth smelting acid dissolution slag
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NANJING GW ENVIRONMENT ENG
- Publication Date
- 2013-07-24
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Abstract
Description
technical field
[0001] The invention relates to a method for recovering rare earth elements in acid-dissolved slag formed in the ionic rare earth smelting process, and belongs to the technical field of comprehensive utilization and treatment of solid waste in the rare earth smelting industry. Background technique
[0002] Rare earths are widely used in new energy, new materials, energy conservation and environmental protection, aerospace, electronic information and other fields. In the smelting process of ionic rare earths, the first step of acid dissolution process is to dissolve rare earth concentrates with hydrochloric acid to form rich Feed liquid of rare earth elements, some impurities in rare earth concentrate that cannot be dissolved by hydrochloric acid, such as rare earth fluoride, radioactive elements, heavy metal salts, barium salts, gravel, etc., are mechanically dehydrated to form acid-soluble slag. During the formation of acid-dissolved slag, impurity particles...