Evolution of mineral facies in magnetic field enhanced reduction of Bayan Obo ore

Zhang Xudong; Jin Yongli

doi:10.7513/j.issn.1004-7638.2021.02.023

Volume 42 Issue 2

Apr. 2021

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Zhang Xudong, Jin Yongli. Evolution of mineral facies in magnetic field enhanced reduction of Bayan Obo ore[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(2): 139-145. doi: 10.7513/j.issn.1004-7638.2021.02.023

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Zhang Xudong, Jin Yongli. Evolution of mineral facies in magnetic field enhanced reduction of Bayan Obo ore[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(2): 139-145. doi: 10.7513/j.issn.1004-7638.2021.02.023

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Evolution of mineral facies in magnetic field enhanced reduction of Bayan Obo ore

doi: 10.7513/j.issn.1004-7638.2021.02.023

Zhang Xudong,
Jin Yongli^,

School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China

Received Date: 2020-12-31
Publish Date: 2021-04-10

Abstract

Abstract

Based on the low-temperature direct reduction process, the magnetic field enhanced reduction experiment of Bayan Obo carbon bearing pellets was carried out at 1 223 K, B = 1.02 T. The effect of magnetic field on iron oxide reduction and rare earth phase transformation of Bayan Obo ore was studied by investigating the reduction efficiency of iron minerals and the ore phase evolution of rare earth minerals. The results show that the magnetic field can promote the reduction of iron oxide, and the metallization rate of the sample can reach 90.23% after 60 min reduction, increased by 52.82% compared with that under the non-magnetic condition. The magnetic field can accelerate the decomposition of bastnaesite and monazite, and promote the formation of CaO·2RE₂O₃·3SiO₂ and RE₂O₃·2SiO₂ (RE = rare earth elements).
- Bayan Obo ore,
- carbon bearing pellets,
- direct reduction,
- magnetic field intensification,
- metallization rate,
- rare earth minerals,
- mineral evolution

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References(15)

References

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