Abstract
Leaching behavior of alumina of smelting reduction calcium aluminate slag based on high-iron red mud composition was investigated. Alumina of calcium aluminate slag was leached using sodium carbonate solutions (Na2CO3 abbr., Na2Oc). The effects of Na2Oc concentration, reaction temperature, reaction time, liquid-solid ratio on the leaching rate of alumina were investigated and its leaching kinetics was studied as well. The results show that the optimum conditions of leaching is reaction temperature of 75 °C, Na2Oc concentration of 100 g L−1, reaction time of 100 min, liquid-solid ratio of 4.5:1. The leaching rate of alumina is 83.7% under the optimum conditions. It is found that the leaching process can be satisfactorily represented by fitting with Avrami equation. The apparent activation energy of leaching pro cess and the feature parameter of Avrami equation are determined to be 11,844 kJ mol−1 and 0.0983, respectively, the leaching process is inner-difussion controlled.
References
Q.H. Xue, Y.W. Chen, Thought and exploration on the comprehensive utilization of red mud from Guangxi Pingguo aluminium Co., Light Met. 10, 11–14 (2011)
Y.F. Zhang, et al., Comprehensive utilization status of red mud from Pingguo and its development and expectation. Light Met. 12, 13–17 (2004)
S.J. Yang, The study of phase indentitification of red mud of pingguo alumina plant. J. Cent. South Univ. Tech. 27(5), 569–573 (1996)
H. Wang et al., Experimental research on comprehensive utilization of the high iron red mud based on direct reduction and melting by RHF iron bead technology. Light Met. 1, 19–22 (2013)
P.H. Liand, G.W. Li, Study on direct reduction of iron red mud digestion of Pingguo aluminum mine. Light Met. 10, 20–24 (1997)
D.C. Lou et al., New process of utilizing red mud from alumina treating plant to produce high quality direct-reduction iron. China Min. Mag. 11(5), 50–54 (2002)
P.B. He, Y.F. Zhou, Y.H. Hu, Reseach of pingguo bayer process red mud with using magnetic separation of selective hydrophobic flocculation. Nonferrous Met. 6, 1–4 (2008)
J.Z. Lu, X.J. Yu, L.P. Zhang, Development condition of recovering iron from red mud. Shandong Metall. 29(4), 10–14 (2007)
Y.F. Chang et al., Sulphuric acid leaching kinetics of pre-reduced laterite ores. J. Mol. Sci. 24(4), 241–245 (2008)
C.F. Dickinson, G.R. Heal, Solid-liquid diffusion controlled rate equations. Thermochim. Acta 340, 89–103 (1999)
N. Demirkiran, A. Kunkul, Dissolution kinetics of ulexite in perchloric acid solutions. Int. J. Mineral Process. 83(1), 76–80 (2007)
H. Okur et al., Effect of ultrasound on the dissolution of colemanite in H2SO4. Hydrometallurgy 67(1), 79–86 (2002)
Q. Li et al., Acid leaching kinetics of zinc plant purification residue. Trans. Nonferrous Met. Soc. China 23, 2786–2791 (2013)
Y.J. Zheng, K.K. Chen, Selective leaching Se from selenium residue by Na2SO3 solutions and leaching kinetics. Chinese J. Nonferrous Met. 22(2), 585–589 (2012)
X.Y. Guo et al., Atmospheric leaching of nickel laterite by hydrochloride acid and its kinetics. Min. Metall. Eng. 31(4), 69–74 (2011)
D.C. Mo, Metallurgy Kinetics (Central South University of Technology Press, Changsha, NY, 1987), p. 295
Acknowledgements
The financial support of National Natural Science Foundation of China (number: 50974064) and Jiangxi Provincial Association of Science and Technology funded projects (No. [2015]141) are gratefully acknowledged.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2017 The Minerals, Metals & Materials Society
About this paper
Cite this paper
Tong, Z., Li, Y. (2017). Leaching Behavior of Alumina from Smelting Reduction Calcium Aluminate Slag with Sodium Carbonate Solution. In: Ratvik, A. (eds) Light Metals 2017. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51541-0_6
Download citation
DOI: https://doi.org/10.1007/978-3-319-51541-0_6
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-51540-3
Online ISBN: 978-3-319-51541-0
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)