Abstract
A novel calcification roasting decomposition method for bastnaesite concentrates has been proposed previously. In this work, the thermodynamic mechanism was investigated via simultaneous measurements of thermogravimetry and differential thermal analyses, combined with X-ray diffraction analyses. Rare earth oxides and calcium fluorides were generated after bastnaesite and calcium hydroxide broke down, respectively. The generation and decomposition of calcium carbonate occurred at the same time. Considering the difficulties in obtaining pure substances, theoretical calculations were applied to determine the standard enthalpy of formation (Δf H 298), Gibbs free energies of formation (Δf G 298), and heat capacities at constant pressure (C p) of some rare earth minerals (CeFCO3 and CeOF). Based on these results, the standard Gibbs energy of reaction at different temperatures (Δr G T) was ascertained, and the major reactions were verified to be thermodynamically reasonable.
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References
A. Jordens, Y. P. Cheng and K. E. Waters: Miner. Eng., 2013, vol. 41, pp. 97-114.
F. Zhou, L. X. Wang, Z. H. Xu, Q. X. Liu, M. J. Deng, R. Chi: Miner. Eng., 2014, vol. 64, pp. 139-45.
S. K. Bhushan and A. Kumar: J. Geol. Soc. India, 2013, vol. 81, pp. 41–60.
A. Jordens, C. Marion, O. Kuzmina and K. E. Waters: Miner. Eng., 2014, vol. 66-68, pp. 119-29.
J. Ren, S. X. Song, A. L. Valdivieso and S. Lu: Int. J. Miner. Process., 2000, vol. 59, pp. 237-45.
G. Ozbayoglu and M. U. Atalay: J. Alloy. Compd., 2000, vol. 303-04, pp. 520-23.
R. A. Chi and D. Z. Wang: Rare Earth Mineral Processing, Science Press, Beijing, 2014.
G. X. Xu: Rare Earths, Metallurgical Industry Press, Beijing, 1995.
W. Y. Wu and X. Bian: Rare Earth Metallurgy Technology, Science Press, Beijing, 2012.
G. C. Zhu, W. Z. Shi and R. A. Chi: J. Chin. Rare Earth Soc., 2002, vol. 20, pp. 136-42 (in Chinese)
W.Y. Wu, J. Chen, S.C. Sun and G.F. Tu: J. Northeast. Univ., 2004, vol. 25(4), pp. 378–81. (in Chinese),
L. S. Wang, C. M. Wang, Y. Yu, X. W. Huang, Z. Q. Long, Y. K. Hou and D. L. Cui: J. Hazard Mater., 2012, vol. 209-210, pp. 77-83.
L. S. Wang, Y. Yu, X. W. Huang, Z. Q. Long and D. L. Cui: Chem. Eng. J., 2013, vol. 215-216, pp. 162-67.
X. W. Xiao, Z. Q. Long, L. S. Wang and Z. Y. Feng: Rare Met., 2015, vol. 34(4), pp. 215-22.
P. Cen, W. Y. Wu and X. Bian: Green Process. Synth., 2016, vol. 5(4), pp. 427-34.
W.Y. Wu, X. Bian, Z.Y. Wu, S.C. Sun and G.F. Gan: Trans. Nonferr. Met. Soc., 2007, vol. 17(4), pp. 864–68.
P. J. Spencer: Thermochim. Acta., 1998, vol. 314(1-2), pp. 1–21.
A. G. Mostafa, J. M. Eakman and S. L. Yarbro: Ind. Eng. Chem. Res., 1995, vol. 34(12), pp. 4577-82.
A. G. Mostafa, J. M. Eakman, M. M. Montoya and S. L. Yarbro: Ind. Eng. Chem. Res., 1996, vol. 35(1), pp. 343-48.
B.V. Lvov: Thermochim. Acta., 2002, vol. 386(1), pp. 1–16.
I. Barin: Thermochemical Data of Pure Substances, Wiley-VCH Verlag GmbH, Weinheim, 1995.
Y. J. Liang, Y. C. Che, X. X. Liu and N. Liu: Inorganic Thermodynamic Data Manual, Neu Press, Shenyang, China, 1994.
W. L. Wang, X. D. Chen, Y. Chen, Y. Dong and C. Y. Ma: Chinese J. Chem. Eng., 2011, vol. 19(3), pp. 489-95.
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Cen, P., Wu, W. & Bian, X. Thermodynamic Mechanism Analysis of Calcification Roasting Process of Bastnaesite Concentrates. Metall Mater Trans B 48, 1539–1546 (2017). https://doi.org/10.1007/s11663-017-0951-7
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DOI: https://doi.org/10.1007/s11663-017-0951-7