Effects of Reagent Concentration and Particle Size οn Diffusion Rate of Mixed Ores with Rare Elements

• Authors: X. Yang , L. Zhang
• Languages of publication: EN

Abstracts

EN

The leaching reaction kinetics of weathered crust elution-deposited rare earth with mixed ammonium salts was studied. The influence of concentration of reagents and particle size of ore on leaching rate was investigated. The results showed that the diffusion process and leaching rate could be improved by increasing reagents concentration and decreasing leaching flowing rate and particle size. The leaching process could be explained with the shrinking core model, which could be controlled by the diffusion rate of reacting reagents in porous solid layer. The leaching rate obeyed the equation as 1-2/3η-(1-η)^{2/3}=7.126×10^{-4}C^{0.3038}R^{0.1942}t.

Keywords

EN

66.30.Fq; 91.65.Rg

Discipline

• 66.30.Fq: Self-diffusion in metals, semimetals, and alloys
• 91.65.Rg: Mineral occurrences and deposits

• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 124
• Issue: 1
• Pages: 66-69

Dates

published

2013-07

received

2012-07-23

(unknown)

2013-03-16

Contributors

author

X. Yang

• School of Sciences, Changchun University, Changchun 130022, P.R. China

author

L. Zhang

• School of Sciences, Changchun University, Changchun 130022, P.R. China

References

• [1] R. Chi, J. Tian, Weathered Crust Elution-Deposited Rare Earth Ores, Nova Science Publishers, Inc., New York 2008
• [2] R. Chi, Z. Guocai, Trans. Nonferrous Metal Soc. China 8, 693 (1998)
• [3] R. Chi, J. Tian, J. Chin. Rare Earth Soc. 25, 641 (2007)
• [4] T. Xunzhong, L. Maonan, Min. Res. Develop. 17, 1 (1997)
• [5] M. Dingcheng, Metallurgical Kinetic Study, Central South University of Technology Publisher, Changsha 1987
• [6] F. Zhaoheng, Leaching, Metallurgical Industry Publishers, Beijing 2007
• [7] R. Chi, Z. Dai, Z. Oxus, Y. Wu, C. Wang, Trans. Nonferrous Met. Soc. China 16, 1421 (2006)
• [8] H. Yao, X. OuYangKe, G. Rao, Jiangxi Sci. 23, 721 (2005)
• [9] J. Tian, Y. Jingqun, Rare Metal 22, 330 (1996)
• [10] J. Tian, L. Shengliang, Y. Jingqun, Eng. Chem. Metall. 16, 354 (1995)
• [11] H.Y. Sohn, M.E. Wadsworth, Extraction Metallurgy Rate Process, Metallurgical Industry Publ., Beijing 1983

Identifiers

DOI

10.12693/APhysPolA.124.66