Method for recovering chlorinated rare earths from rare earth materials
By melting and reacting rare earth materials with calcium-containing compounds and carbon powder at high temperatures to generate calcium fluoride to fix fluorine and promote rare earth leaching, the problems of long process flow and serious pollution in existing processes are solved, and efficient rare earth resource recovery and leaching are achieved.
CN120555784BActive Publication Date: 2026-06-23BAOTOU RESEARCH INSTITUTE OF RARE EARTHS
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BAOTOU RESEARCH INSTITUTE OF RARE EARTHS
- Filing Date
- 2025-06-12
- Publication Date
- 2026-06-23
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Figure CN120555784B_ABST
Abstract
The application provides a method for recovering chlorinated rare earth from rare earth materials, and belongs to the technical field of rare earth hydrometallurgy. The method comprises the following steps: uniformly mixing the rare earth materials with a calcium-containing compound and carbon powder, heating, and reacting in a molten state to obtain roasted ore; crushing and grinding the roasted ore, uniformly mixing the roasted ore with water, and then adding hydrochloric acid to perform reaction 2; after the reaction 2 is completed, solid-liquid separation is performed to obtain a chlorinated rare earth solution and a leaching residue; and the temperature of the reaction 1 is 1500 DEG C-2000 DEG C, and the time is 0.5-2h. In the method, the rare earth materials do not need to be pretreated by grinding and sieving, and can directly react with the calcium-containing compound and the carbon powder, so that the process flow is short. The rare earth decomposition rate of the slag is above 98%, the rare earth leaching rate is above 96%, and the recycling and utilization of the rare earth resources are effectively realized.
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