Complexation Decomposition of Baotou Rare Earth Concentrate under Microwave Condition

被引：0
作者：
Song J. [1 ]
Zhang X. [1 ,2 ]
Zhang Z. [3 ]
Wang M. [1 ,2 ]
Hu Y. [1 ]
Liu Z. [1 ]
机构：
[1] School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou
[2] School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai
[3] Key Laboratory of Ecological Metallurgy of Multi-Metal Intergrown Ores of Ministry of Education, Northeastern University, Shenyang
来源：
Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2022年 / 40卷 / 05期
关键词：
Dynamics; Fluoride aluminum complexation reaction; Leaching rate; Microwave; Rare earth concentrate;
D O I：
10.11785/S1000-4343.20220514
中图分类号：
学科分类号：
摘要：
HCl-AlCl3 solution system was used to complexation of Baotou mixed rare earth concentrate under microwave condition. The effects of microwave power, liquid-solid ratio, HCl concentration, reaction temperature, AlCl3 concentration and reaction time on the leaching rate of rare earth and mixed concentrate were explored, and the leaching process kinetics was studied in detail. The optimal leaching conditions were obtained as follows: microwave power 560 W, liquid-solid ratio 16:1 mL∙g-1, HCl concentration 3.5 mol∙L-1, reaction temperature 85 ℃, AlCl3 concentration 1 mol∙L-1, reaction time 75 min. The rare earth leaching rate was 74.36%, and the mixed concentrate leaching rate was 75.59%. The results of XRD, SEM-EDS and chemical analysis show that almost all the bastnaesite in the mixed rare earth concentrate is decomposed. The leaching process of the concentrate by microwave complex leaching conforms to the shrink core deformation model, and the apparent activation energy of the reaction is 56.44 kJ∙mol-1. © 2022, Editorial Office of Journal of the Chinese Society of Rare Earths. All right reserved.
引用
收藏
页码：844 / 852
页数：8
相关论文
共 23 条
  • [1] Jha M K, Kumari A, Panda R, Kumar J R, Yoo K, Lee J., Review on hydrometallurgical recovery of rare earth metals, Hydrometallurgy, 165, (2016)
  • [2] Balaram V., Rare earth elements: A review of applications, occurrence, exploration, analysis, recycling, and environmental impact, Geosci. Front, 10, 4, (2019)
  • [3] Li J F, Li M, Zhang D L, Gao K, Xu W, Wang H H, Geng J L, Huang L., Clean production technology of Baiyun Obo rare earth concentrate decomposed by Al(OH)<sub>3</sub>-NaOH, Chem. Eng. J, 382, (2020)
  • [4] Li J F, Li M, Zhang D L, Gao K, Xu W, Wang H H, Geng J L, Ma X F, Huang L., Clean production technology of selective decomposition of Bayan Obo rare earth concentrate by NaOH, J. Cleaner Prod, 236, (2019)
  • [5] Bian X, Chen J L, Zhao Z H, Yin S H, Luo Y, Zhang F Y, Wu W Y., Kinetics of mixed rare earths minerals decomposed by CaO with NaCl-CaCl<sub>2</sub> melting salt, J. Rare Earths, 28, (2010)
  • [6] Wu W Y, Bian X, Wu Z Y, Sun S C, Tu G F., Reaction process of monazite and bastnaesite mixed rare earth minerals calcined by CaO-NaCl-CaCl<sub>2</sub>, Trans. Nonferrous Met. Soc. China, 17, 4, (2007)
  • [7] Wu W Y, Bian X, Sun S C, Tu G F., Study on roasting decomposition of mixed rare earth concentrate in CaO-NaCl-CaCl<sub>2</sub>, J. Rare Earths, 24, 1, (2006)
  • [8] Li Y Y, Hu Q Y, Li H Y, Li J, Liu Y Z, Zhou X Z, Li D P, Li Y X., Rare earths and aluminum: from entanglement to respect with each other, Journal of the Chinese Society of Rare Earths, 39, 3, (2021)
  • [9] Li M, Zhang X W, Liu Z G, Wang M T, Liu J, Yang J P., Mixed rare earth concentrate leaching with HCl-AlCl<sub>3</sub> solution, Rare Met, 32, 3, (2013)
  • [10] Li M, Zhang X W, Liu Z G, Hu Y H, Wang M T, Liu J, Yang J P., Kinetics of leaching fluoride from mixed rare earth concentrate with hydrochloric acid and aluminum chloride, Hydrometallurgy, 140, (2013)
123