Characteristics of the reduction behavior of zinc ferrite and ammonia leaching after roasting

Abstract

A novel method for recovering zinc from zinc ferrite by reduction roasting-ammonia leaching was studied in this paper. The reduction thermodynamic of zinc ferrite by CO was analyzed. The effects of roasting parameters on the phase transformation and conversion rate of zinc ferrite, and the leaching behavior of zinc from the reductive roasted samples by ammonia leaching, were experimentally investigated. The mineralogical phase compositions and chemical compositions of the samples were characterized by X-ray diffraction and chemical titration methods, respectively. The results showed that most of the zinc ferrite was transformed to zinc oxide and magnetite after weak reduction roasting. 86.43% of the zinc ferrite was transformed to zinc oxide under the optimum conditions: CO partial pressure of 25%, roasting temperature of 750°C, and roasting duration of 45 min. Finally, under the optimal leaching conditions, 78.12% of zinc was leached into the solution from the roasted zinc ferrite while all iron-bearing materials were kept in the leaching residue. The leaching conditions are listed as follows: leaching duration of 90 min, ammonia solution with 6 mol/L concentration, leaching temperature of 50°C, solid-to-liquid ratio of 40 g/L, and stirring speed of 200 r/min.

Keywords

zinc ferrite / reduction roasting / ammonia leaching / zinc extraction / zinc-bearing waste ak

References

[1] Chen TT, Dutrizac JE. Mineralogical changes occurring during the fluid-bed roasting of zinc sulfide concentrates. JOM, 2004, 56, 46.

[2] Kim W, Saito F. Mechanochemical synthesis of zinc ferrite from zinc oxide and α-Fe₂O₃. Powder Technol, 2001, 114, 12.

[3] Langová Matýsek D. Zinc recovery from steel-making wastes by acid pressure leaching and hematite precipitation. Hydrometallurgy, 2010, 101, 171.

[4] Boyanov B, Peltekov A, Petkova V. Thermal behavior of zinc sulfide concentrates with different iron content at oxidative roasting. Thermochim. Acta, 2014, 586, 9.

[5] Lin XL, Peng ZW, Yan JX, Li ZZ, Hwang JY, Zhang YB, Li GH, Jiang T. Pyrometallurgical recycling of electric arc furnace dust. J. Cleaner Prod., 2017, 149, 1079.

[6] Li YC, Liu H, Peng B, Min XB, Hu M, Peng N, Yuang YZ, Lei J. Study on separating of zinc and iron from zinc leaching residues by roasting with ammonium sulphate. Hydrometallurgy, 2015, 158, 42.

[7] Zhang F, Wei C, Deng ZG, Li CX, Li XB, Li MT. Reductive leaching of zinc and indium from industrial zinc ferrite particulates in sulphuric acid media. Trans Nonferrous Met. Soc. China, 2016, 26, 2495.

[8] Hu M, Peng B, Chai LY, Li YC, Peng N, Yuan YZ, Chen D. High-zinc recovery from residues by sulfate roasting and water leaching. JOM, 2015, 67, 2005.

[9] Zhang YL, Yu XJ, Li XB. Zinc recovery from franklinite by sulphation roasting. Hdrometallurgy, 2011, 109, 211.

[10] Zhao YC, Stanforth R. Extraction of zinc from zinc ferrites by fusion with caustic soda. Miner. Eng, 2000, 13, 1417.

[11] Miki T, Chairaksa-Fujimoto R, Maruyama K, Na-gasaka T. Hydrometallurgical extraction of zinc from CaO treated EAF dust in ammonium chloride solution. J. Hazard. Mater, 2016, 302, 90.

[12] Chairaksa-Fujimoto R, Maruyama K, Mki T, Na-gasaka T. The selective alkaline leaching of zinc oxide from electric arc furnace dust pre-treated with calcium oxide. Hydrometallurgy, 2016, 159, 120.

[13] Leclerc N, Meux E, Lecuire JM. Hydrometallurgical extraction of zinc from zinc ferrites. Hydromeallurgy, 2003, 70, 175.

[14] Havlik T, Turzakova M, Stopic S, Friedrich B. Atmospheric leaching of EAF dust with diluted sulphuric acid. Hydrometallurgy, 2005, 77, 41.

[15] Halli P, Hamuyuni J, Leikola M, Lundström M. Developing a sustainable solution for recycling electric arc furnace dust via organic acid leaching. Miner. Eng, 2018, 124, 1.

[16] Yang SH. Theory and Application Studies on Preparing High Purity Zinc in the System of Zn (II)-NH₃-NH₄Cl-H₂O [Dissertation], 2003, Changsha, Central South University

[17] Wang RX, Tang MT, Yang SH, Zhang WH, Tang CB, He J, Yang JG. Leaching kinetics of low grade zinc oxide ore in NH₃-NH₄Cl-H₂O system. J. Cent. South Uni. Technol, 2008, 15, 679.

[18] Xia DK, Pickles CA. Kinetics of zinc ferrite leaching in caustic media in the deceleratory period. Miner. Eng, 1999, 12, 693.

[19] Zeydabadi BA, Mowla D, Shariat MH, Kala-jahi JF. Zinc recovery from blast furnace flue dust. Hydrometallurgy, 1997, 47, 113.

[20] Turan MD, Altundoğan HS, Tümen F. Recovery of zinc and lead from zinc plant residue. Hydrometallurgy, 2004, 75, 169.

[21] Wang X, Yang DJ, Ju SH, Peng JH, Duan XH. Thermodynamics and kinetics of carbothermal reduction of zinc ferrite by microwave heating. Trans. Nonferrous Met. Soc. China, 2013, 23, 3808.

[22] Li M, Peng B, Chai LY, Peng N, Yan H, Hou DK. Recovery of iron from zinc leaching residue by selective reduction roasting with carbon. J. Hazard. Mater, 2012, 237-238, 323.

[23] Yan H, Chai LY, Peng B, Li M, Peng N, Hou DK. A novel method to recover zinc and iron from zinc leaching residue. Miner. Eng, 2014, 55, 103.

[24] Han JW, Liu W, Qin WQ, Yang K, Wang DW, Luo HL. Innovative methodology for comprehensive utilization of high iron bearing zinc calcine. Sep. Purif. Techn-ol, 2015, 154, 263.

[25] Peng N, Peng B, Chai LY, Li M, Wang JM, Yan H, Yuan Y. Recovery of iron from zinc calcines by reduction roasting and magnetic separation. Miner. Eng, 2012, 35, 57.

[26] Han JW, Liu W, Qin WQ, Peng B, Yang K, Zheng YX. Recovery of zinc and iron from high iron-bearing zinc calcine by selective reduction roasting. J. Ind. Eng. Chem., 2015, 22, 272.

[27] Yu G, Peng N, Zhou L, Liang YJ, Zhou XY, Peng B, Chai LY, Yang ZH. Selective reduction process of zinc ferrite and its application in treatment of zinc leaching residues. Trans. Nonferrous Met. Soc. China, 2015, 25, 2744.

[28] Chairaksa-Fujimoto R, Inoue Y, Umeda N, Itoh S, Nagasaka T. New pyrometallurgical process of EAF dust treatment with CaO addition. Int. J. Miner. Metall. Mater, 2015, 22, 788.

[29] Beijing General Research Institute of MningMetallurgy. Chemical Phase Analysis, 1979, Beijing, Metallurgical Industry Press

[30] Li M. Fundamental Research on Selective Reduction of Zinc Calcine and Separation of Zinc and Iron, 2013

[31] Wu CC, Chang FC, Chen WS, Tsai MS, Wang YN. Reduction behavior of zinc ferrite in EAF-dust recycling with CO gas as a reducing agent. J. Environ. Manage., 2014, 143, 208.

[32] Yan H. Treatment of Zinc Leaching Residue Based on the Selective Reduction of Zinc Ferrite, 2014, Changsha, Central South University

[33] Sui YL, Guo YF, Jiang T, Qiu GZ. Reduction kinetics of oxidized vanadium titano-magnetite pellets using carbon monoxide and hydrogen. J. Alloys Compd, 2017, 706, 546.

[34] Chen W, Guo YF, Chen F, Jiang T, Liu XD. The extraction of zinc from willemite by calcified-roasting and ammonia-leaching process based on phase reconstruction. the 7th International Symposium on High-Temperature Metallurgical Processing, Nashville, 2016 109

[35] Chen F, Chen W, Guo YF, Wang S, Zheng FQ, Jiang T, Xie ZQ, Yang LZ. Thermodynamics and phase transformations in the recovery of zinc from willemite. Int. J. Miner. Metall. Mater, 2018, 25, 1373.