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Jiang Y.-J.,Key Laboratory of Integrated Exploitation of Bayan Obo Multi Metalli Resources | Jiang Y.-J.,Inner Mongolia University of Science and Technology | Deng Y.-C.,Inner Mongolia University of Science and Technology
Chinese Rare Earths | Year: 2014

By H2/H2O selective oxidation, Ni/ La2O3 powder would be made from LaNi5 alloy powders which can be gotten by crushing and grinding LaNi5 alloy by arc melting from metal La and Ni. Then LaNi5 alloy powder and Ni/ La2O3 alloy powder were observed separately by the XRD structure analysis and SEM morphology. The XRD structure analysis showed that LaNi5 alloy powder by arc melting contained single LaNi5, and Ni/ La2O3 powder included some La2O3 and Ni without other phase. SEM morphology showed LaNi5 powder and Ni/La2O3 powder had the same morphology. Calculation of FWHM of the diffraction peak by Scherrer indicated the grain size of La2O3 and Ni was in the range of 10 ~ 40nm. Analysis of Ni/ La2O3 power by SEM-EDS showed that the element content distributed regularly. Ni/ La2O3 powder was expected to be used in catalytic materials. Source


Jiang Y.-J.,Key Laboratory of Integrated Exploitation of Bayan Obo Multi Metalli Resources | Jiang Y.-J.,Inner Mongolia University of Science and Technology | Zhao Z.-W.,Key Laboratory of Integrated Exploitation of Bayan Obo Multi Metalli Resources | Zhao Z.-W.,Inner Mongolia University of Science and Technology | And 4 more authors.
Chinese Rare Earths | Year: 2015

In this paper, iron concentrate of Bayan Obo west mine has been treated by direct reduction and melting separation method and checked by the conditional direct reduction to get the gauge. Then the slag, which has been made from the guage by melting separation experiment, was analyzied to find out the chemical compositions, structures, melting temperature, micro-topography, constituent and the enrichment of rare earth. The results showed that the slag softening temperature was 1350℃ while its melting temperature was over 1500℃, the rare earth has been enriched remarkably and crystallized and separated out in cerium oxide in priority. The content of rare earth oxide in the enriched part was about 42%. © 2015, Editorial Office of "Chinese Rare Earths". All right reserved. Source


Jiang Y.-J.,Key Laboratory of Integrated Exploitation of Bayan Obo Multi Metalli Resources | Jiang Y.-J.,Inner Mongolia University of Science and Technology | Zhao Z.-W.,Key Laboratory of Integrated Exploitation of Bayan Obo Multi Metalli Resources | Zhao Z.-W.,Inner Mongolia University of Science and Technology | And 4 more authors.
Chinese Rare Earths | Year: 2014

Rare earth in main and east orebodies of Bayan Obo has been enriched in molten slag formed of gangue by direct reduction and melting separation method. The chemical compositions, structures and melting temperature of slag were determined. Micro-topography and compositions of the slag were investigated. The enrichment situation of rare earth in the slag has been proven. The results showed that after sponge melting separation, the melting temperature of slag formed by gangue was 1350°C. Rare earth in slag had a remarkable enrichment and it crystallized and separated out in oxide preferentially. The content of rare earth oxide in rare earth phase was about 60%. Source

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