Scandium Recovery from Red Mud by Carbonate Assist
Abstract
Known methods for production of scandium compounds are based mainly on the acidic leaching of scandium-containing materials, followed by its isolation as sparingly soluble compounds. However, these schemes have many operations, consume high amounts of reagents and electric power, resulting in a high cost of the final product. The effect of carbonate ions concentration, contact time, temperature, the ratio of S:L, type and amount of sorbent on the degree of scandium separation directly from red mud slurry was studied in this work. It has been shown that the greatest capacity of macroporous adsorbents exhibit scandium acrylic copolymers iminodifosfonic group situated closer to the polymer skeleton.
Keywords: Scandium, red mud, leaching, sorption, ion exchange resin, extraction
References
[1] W. Wang, Y. Pranolo, and C. Y. Cheng, “Metallurgical processes for scandium recovery from various resources: A review,” Hydrometallurgy, vol. 108, no. 1-2, pp. 100–108, 2011.
[2] K. Binnemans, P. T. Jones, B. Blanpain, T. Van Gerven, and Y. Pontikes, “Towards zerowaste valorisation of rare-earth-containing industrial process residues: A critical review,” Journal of Cleaner Production, vol. 99, pp. 17 38, 2015.
[3] C. Klauber, M. Gräfe, and G. Power, “Bauxite residue issues: II. options for residue utilization,” Hydrometallurgy, vol. 108, no. 1-2, pp. 11–32, 2011.
[4] I. N. Pyagai, L. A. Pasechnik, A. S. Yatsenko, V. M. Skachkov, and S. P. Yatsenko, “Recovery of sludge from alumina production,” Russian Journal of Applied Chemistry, vol. 85, no. 11, pp. 1649–1653, 2012.
[5] P. Davris, E. Balomenos, D. Panias, and I. Paspaliaris, “Selective leaching of rare earth elements from bauxite residue (red mud), using a functionalized hydrophobic ionic liquid,” Hydrometallurgy, vol. 164, pp. 125–135, 2016.
[6] M. K. Jha, A. Kumari, R. Panda, J. Rajesh Kumar, K. Yoo, and J. Y. Lee, “Review on hydrometallurgical recovery of rare earth metals,” Hydrometallurgy, vol. 161, pp. 77–101, 2016.
[7] Y. Liu and R. Naidu, “Hidden values in bauxite residue (red mud): Recovery of metals,” Waste Management, vol. 34, no. 12, pp. 2662–2673, 2014.
[8] O. Petrakova, G. Klimentenok, A. Panov, and S. Gorbachev, 2014. Application of modern methods for red mud processing to produce rare earth elements. In: Proceedings of the 1st European Rare Earth Resources Conference (ERES 2014), Milos (Greece), 4e7 September 2014, pp. 221–229.
[9] T. Kinnarinen, B. Lubieniecki, L. Holliday, J.-J. Helsto, and A. Häkkinen, “Recovery of sodium from bauxite residue by pressure filtration and cake washing,” International Journal of Mineral Processing, vol. 141, article no. 2766, pp. 20–26, 2015.
[10] C. R. Borra, Y. Pontikes, K. Binnemans, and T. Van Gerven, “Leaching of rare earths from bauxite residue (red mud),” Minerals Engineering, vol. 76, pp. 20–27, 2015.