Separation of Manganese and Iron from Reductive Leaching Liquor of Electric Arc Furnace Dust of Ferromanganese Production Units by Solvent Extraction

Document Type : Original Paper


School of Metallurgy and Materials Engineering, University of Tehran, Tehran, Iran


Electric arc furnace dust (EAFD) of ferromanganese production units, in the form of slurry, contains tar, alkalies, manganese, zinc, iron, silica, calcium, aluminum and other elements. A hydrometallurgical route based on solvent extraction technique was investigated for selective separation of manganese from the dust. Leaching of the EAFD resulted in an aqueous feed containing 4 g/L of manganese and 0.87 g/L iron. At the next stage, extraction of manganese and iron from the leach liquor was performed using D2EHPA, Cyanex 272, Cyanex 302 and their mixtures in various proportions. The synergistic effect of the extractants on the separation of iron and manganese with a mixture of D2EHPA and Cyanex 272 or Cyanex 302 was studied. Increasing the Cyanex 272/ 302 to D2EHPA ratio in the organic phase increased the distance between the extraction isotherms of manganese and Iron. The highest separation factor of iron over manganese was obtained with 15:5% v/v of Cyanex 302: D2EHPA mixture. Effects of various aromatic and aliphatic diluents, such as hexane, kerosene, and carbon tetrachloride on the extraction were also investigated.


[1] Ghafarizadeh, B., Rashchi, F. and Vahidi, E. (2010). Recovery of manganese from electric arc furnace dust of ferromanganese production units by reductive leaching. Mineral Engineering, 24- 174-176.
[2] Zhang. W. and Cheng, C. Y. (2007). Manganese metallurgy review. Part II: Manganese separation and recovery from solution. Hydrometallurgy. 89: 160-177.
[3] Cheng, C.Y. (2000). Purification of synthetic laterite leach solution by, solvent extraction using D2EHPA. Hydrometallurgy, 56: 369-386.
[4] Nathsarma, K.C. and Devi, N.B. (2006). Separation of Zn(II) and Mn(II) from sulphate solutions using sodium salts of D2EHPA, PC88A and Cyanex 272. Hydrometallurgy, 84: 149-154.
[5] Devi, N.B., Nathsarma, K.C. and Chakravortty, V. (2000). Separation of divalent manganese and cobalt ions from sulphate solutions using sodium salts of D2EHPA, PC 88A and Cyanex 272. Hydrometallurgy, 54: 117-131.
[6] Darvishi, D., Teimouri, M., Keshavarz, E, Haghshenas, Sadrnezhasd, D.F., Sadrnezaad S.K. and Nazri, K. (2005). Extraction of manganese from solutions containing zinc and cobalt by D2EHPA and D2EHPA-Cyanes 272 or Cyanex 302 mixtures. ISEC Conference: Beijing.
[7] El-Nadi, Y.A. and El-Hefny, N.E. (2010). Removal of iron from Cr-electroplating solution by extraction with di(2-ethylhexyl)phosphoric acid in kerosene. Chemical Engineering and Processing, 49: 159-164.
[8] Ismael, M.R.C. and Carvalho, J.M.R. (2003). Iron recovery from sulphate leach liquors in zinc hydrometallurgy. Minerals Engineering, 16: 31-39.
[9] Jayachandran, J. and Dhadke, P.M. (1997). Liquid-liquid extraction separation of iron (III) with 2-ethyl hexyl phosphonic acid mono 2-ethyl hexyl ester. Talanta, 44: 1285-1290.
[10] Salgado, A.L., Veloso, A.M.O., Pereira, D.D., Gontijo, G.S., Salum, A. and Mansur, M.B. (2003). Recovery of zinc and manganese from spent alkaline batteries by liquid-liquid extraction with Cyanex 272. Journal of Power Sources, 115: 367-373.
[11-] Mantuano, D.P., Dorella, G., Elias, R.C. A. and Mansur, M.B. (2006). Analysis of a hydrometallurgical route to recover base metals from spent rechargeable batteries by liquid-liquid extraction with Cyanex 272. Journal of Power Sources, 159: 1510-1518.
[12] Devi, N.B., Nathsarma, K.C., and Chakravortty, V. (1997). Extraction and separation of Mn(II) and Zn(II) from sulphate solutions by sodium salt of Cyanex 272. Hydrometallurgy, 45: 169-179.
[13] Cole, P.M (2002). The introduction of solvent-extraction steps during upgrading of a cobalt refinery. Hydrometallurgy, 64: 69-77.
[14] Nihar Bala Devi and Sujata Mishra (2010). Solvent extraction equilibrium study of manganese(II) with Cyanex 302 in Kerosene. Hydrometallurgy, 103: 118-123.
[15] Ajgaonkar, H.S. and Dhadke, P.M. (1997). Solvent extraction separation of iron(III) and aluminum (III) from other elements with Cyanex 302. Talanta, 44: 563-570.
[16] Bartkowska, M., Regel-Rosocka, M. and Szumanowski, J. (2002). Extraction of Zinc(II), Iron(III) and Iron(II) with binary mixtures containing Tributyl Phosphate and Di(2- ethylhexyl) Phosphoric acid or Cyanex 302. Problems of Mineral Processing, 36: 217-224.
[17] Hosseini, T., Rashchi, F. Vahidi, E. and Mostoufi, N. (2010). Investigating the synergistic effect of D2EHPA and Cyanex 302 on zinc and manganese separation. Separation Science and Technology,45: 1158-1164.
[18] Darvishi, D., Haghshenas, D.F., Keshavarz, E., Sadrnezhaada, S.K. and Halali, M. (2005) Synergistic effect of Cyanex 272 and Cyanex 302 on separation of cobalt and nickel by D2EHPA:, Hydrometallurgy, 77: 227-238.
[19] Vogel, A.I. (1989). Vogel’s text book of quantitative inorganic analysis, 5th ed.; Longman scientific & technical: New York, USA.
[20] Rydberg, j., Cox, M., Musikas, C. and Choppin, G.R. (2004). Solvent Extraction Principles and Practice, 2ndEd; Taylor & Francis Group: New York, USA.
[21] Haghshenas, D., Darvishi, D., Etemadi, S., Eivazi, A.R., Keshavarz, E. and Salardini, A.A. (2009). Interaction between TBP and D2EHPA during Zn, Cd, Mn, Cu, Co and Ni solvent extraction: A thermodynamic and empirical approach. Hydrometallurgy, 98: 143- 147.
[22] Vahidi, E., Rashchi, F. and Moradkhani, D. (2008). Recovery of zinc from an industrial zinc leach residue by solvent extraction using D2EHPA. Minerals Engineering, 22: 204-206.
[23] Mohapatra, D., Hong-In, K., Nam, C.W. and Park, K.H. (2007). Liquid-liquid extraction of aluminum (III) from mixed sulphate solutions using sodium salts of Cyanex 272 and D2EHPA. Separation and Purification Technology, 56: 311-318.