Abstract:The rare earth magnesium salt concentrates obtained by precipitation of MgSO4 rare earth leaching mother liquor with MgO as precipitant have a little amount of REO, which requires further removal of impurities to enrich rare earth. The process of carbonization, acid dissolution, neutralization, impurity removal and precipitation was studied by using ionic rare earth magnesium salts as raw materials. The exploratory test results show that the loss of REO during the carbonization process is minimal or even negligible, and there is 24.33% to 30.9% MgO converts from rare earth magnesium salt concentrates into the carbonized solution. During the neutralization impurity removal process, Fe removal rate is about 99.5%, and Al removal rate is about 98.6%. Rare earth carbonate is obtained by using carbonized liquid as the precipitating agent to precipitate and remove impurities. After burning, the rare earth oxides that meets the quality requirements of the GB/T 20169—2015 ionic rare earth ore mixed rare earth oxides are obtained. The total slag rate of the process is 19.81%—23.22%, and the average total recovery of REO is 89.43%. In order to form a complete set of technology for extracting rare earth from ionic rare earth magnesium salt enrichment and obtain the best technical parameters, further in-depth research and optimization are needed.