Abstract
Copper slag (CS) with Fe-bearing fayalite and magnetite is the main waste generated during the pyrometallurgical processing of metallic copper. In this paper, the solid-state reduction kinetics of fayalite with and without addition of 10 wt.% metallic iron were studied using the isothermal method. The phase transformation of fayalite was verified by x-ray diffraction, scanning electron microscopy, and energy dispersive spectrometer. Results show that the carbothermal reduction of fayalite is controlled by phase boundary reaction (tridimensional shape), and the activation energy decreases from 165.22 kJ mol−1 to 145.74 kJ mol−1 after adding 10 wt.% metallic iron. During the carbothermal reduction process, fayalite decomposes into metallic iron and quartz solid solution, followed by the conversion of quartz solid solution into cristobalite solid solution with increasing temperature. The addition of metallic iron creates a nucleating effect and accelerates the decomposition of fayalite. This work contributes to efforts to optimize the carbothermal reduction of CS.
Similar content being viewed by others
References
M.E. Schlesinger, M.J. King, K.C. Sole, and W.G. Davenport, Extractive metallurgy of copper (Elsevier, 2011).
Y. Feng, Q.X. Yang, Q.S. Chen, J. Kero, A. Andersson, H. Ahmed, F. Engström, and C. Samuelsson, J. Cleaner Prod. 1112 (2019).
K. Holland, R.H. Eric, P. Taskinen, and A. Jokilaakso, Miner. Eng. 133, 35 (2019).
I. Alp, H. Deveci, and H. Sungun, J. Hazard. Mater. 159, 390 (2008).
B. Gorai, R.K. Jana, and Premchand, Resour. Conserv. Recycl. 39, 299 (2003).
T.J. Chun, G. Mu, Z. Di, H.M. Long, C. Ning, and D. Li, Arch. Metall. Mater. 63, 299 (2018).
Z.Q. Guo, D.Q. Zhu, J. Pan, and F. Zhang, JOM 68, 2341 (2016).
X.S. Lai and H.J. Huang, Metal Mine 11, 205 (2017).
K.X. Jiao, J.L. Zhang, Z.J. Liu, C.L. Chen, and F.H. Liu, Ironmaking Steelmaking 44, 344 (2017).
H.S. Altundogan, M. Boyrazli, and F. Tumen, Miner. Eng. 17, 465 (2004).
A.N. Banza, E. Gock, and K. Kongolo, Hydrometallurgy 67, 63 (2002).
S. Gyurov, N. Marinkov, Y. Kostova, D. Rabadjieva, D. Kovacheva, C. Tzvetkova, G. Gentscheva, and I. Penkov, Int. J. Miner. Process. 158, 1 (2017).
I. Gaballah, S. El Raghy, and C. Gleitzer, J. Mater. Sci. 13, 1971 (1978).
Z.Q. Guo, D.Q. Zhu, J. Pan, W.J. Yao, W.Q. Xu, and J.N. Chen, JOM 69, 1688 (2017).
J.H. Heo, B.S. Kim, and J.H. Park, Metall. Mater. Trans. B 6, 1352 (2013).
S.W. Li, J. Pan, D.Q. Zhu, Z.Q. Guo, J.W. Xu, and J.L. Chou, Powder Technol. 347, 159 (2019).
Z.Q. Guo, J. Pan, D.Q. Zhu, and F. Zhang, JOM 70, 150 (2018).
I. Barin, Thermochemical Data of Pure Substances (Weinheim: VCH Verlagsgesellschaft mbH, 1995).
A. Warczok and T.A. Utigard, Can. Metal. Q. 37, 27 (1998).
H. Zhang, G. Wang, S.H. Zhang, J.S. Wang, and Q.G. Xue, Nonferrous Metals Sci. Eng. 10, 28 (2019).
L. Zhang, Y. Zhu, W.Z. Yin, B. Guo, F. Rao, and J.G. Ku, ACS Omega 5, 8605 (2020).
L. Zhang, H.H. Chen, R.D. Deng, W.R. Zuo, B. Guo, and J.G. Ku, Powder Technol. 367, 157 (2020).
D. Daval, D. Testemale, N. Recham, J.M. Tarascon, J. Siebert, I. Martinez, and F. Guyot, Chem. Geol. 275, 161 (2010).
A. Khawam and D.R. Flanagan, J. Phys. Chem. B 110, 17315 (2006).
M.J. Starink, Thermochim. Acta 404, 163 (2003).
S. Nasr and K.P. Plucknett, Energy Fuels 28, 1387 (2014).
P.E. Sánchez-Jiménez, A. Perejón, J.M. Criado, M.J. Diánez, and L.A. Pérez-Maqueda, Polymer 51, 3998 (2010).
X.B. Li, H.Y. Wang, Q.S. Zhou, T.G. G.H. Qi, Liu, Z.H. Peng, and Y.L. Wang, Trans. Nonferrous Met. Soc. China 29, 416 (2019).
X.B. Li, H.Y. Wang, Q.S. Zhou, T.G. Qi, G.H. Liu, and Z.H. Peng, Waste Manage. 87, 798 (2019).
A.C.D. Chaklader and A.L. Roberts, J. Am. Ceram. Soc. 44, 35 (1961).
Acknowledgements
This work was financially supported by the China Postdoctoral Science Foundation (2019M662733), National Natural Science Foundation of China (51874219) and National Key Research and Development Program of China (2018YFC1901502).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflicts of Interest
On behalf of all authors, the corresponding author states that there is no conflict of interest.
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Supplementary Information
Below is the link to the electronic supplementary material.
Rights and permissions
About this article
Cite this article
Wang, H., Shen, L., Bao, H. et al. Investigation of Solid-State Carbothermal Reduction of Fayalite with and Without Added Metallic Iron. JOM 73, 703–711 (2021). https://doi.org/10.1007/s11837-020-04515-8
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11837-020-04515-8