Magnetic separation of roasted hematitic ore

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DOI:

https://doi.org/10.15628/holos.2022.10055

Palavras-chave:

Hematita, ustulação magnetizante, separação magnética

Resumo

Roasting of hematitic ore has been tested in boosting of magnetic concentration of hematitic iron ore. Coke rate, roasting time, and temperature were analyzed at several levels based on literature. Sample characterization was done to evaluate the density of sample and the size particle of ore and coke. Thermogravimetric analysis has indicated hematite to magnetite transformation by characteristic peaks of mass loss. The hematite-magnetite transformation imparts strong contrast in magnetic susceptibility between iron-bearing minerals and gangue, composed basically of quartz. The results have confirmed the reinforcement of magnetism due to roasting process and photographs proved the magnetic character of roasted sample. The best condition obtained was 35 minutes, 10 % of coke (in mass), and 1,023 K (750 oC). The yield was increased by 5.3 % under 0.93 T and by 240.3 % under 0.06 T, increasing selectivity of magnetic separation even under low magnetic gradient. This route could be successfully applied to tailings at low gradient field, recommending the application of this technique for iron ore processing, naturally after careful economic analysis, in which the quantification of environmental liabilities (primarily resulting from its non-implementation) is included.

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Biografia do Autor

Pedro Henrique Neuppmann, Universidade Federal de Ouro Preto

Engenheiro de Minas pela Universidade Federal de Ouro Preto e mestre em Engenharia Mineral, com ênfase em Tratamento de Minérios, pela mesma universidade,. Técnico em Mineração pelo CEFET — Araxá.

José Aurélio Medeiros da Luz, Universidade Federal de Ouro Preto

Departamento de Engenharia de Minas da Escola de Minas da UFOP; área de tratamento minérios.

Referências

Cui, Z., Liu, Q., & Etsell T. H. (2002). Magnetic Properties of Ilmenite, Hematite and Oilsand Minerals after Roasting. Minerals Engineering, 15, 1121–1129.

Dauce, P. D., Castro, G. B., Lima, M. M. F., & Lima, R. M. F. (2019). Characterisation and magnetic concentration of an iron ore tailings. Journal of Materials Research and Technology, 8, 1052–1059.

Faris, N., Tardio, J., Ram, R., Bhargava, S., & Pownceby, M. I. (2017). Investigation into coal-based magnetizing roasting of an iron-rich rare earth ore and the associated mineralogical transformations. Minerals Engineering, 114, 37–49.

Jang, K., Nunna, V. R. M., Hapugoda, S., Nguyen, A. V., & Bruckard W. J. (2014) Chemical and mineral transformation of a low grade goethite ore by dehydroxylation, reduction roasting and magnetic separation. Minerals Engineering, 60, 14–22.

Li, C., Sun, H., Bai, J., & Li, L. (2010). Innovative methodology for comprehensive utilization of iron ore tailings. Journal of Hazardous Materials, 174, 71 – 77.

Mazeina, L. L., Navrotsky. A. (2005). Surface Enthalpy of Goethite. Clays and Clay Minerals, 53, 113–122.

Peng, T., Gao, X., Li, Q., Xu, L., Luo, L., & Xu, L. (2017). Phase transformation during roasting process and magnetic beneficiation of oolitic-iron ores. Vacuum, 146, 63–73.

Plascencia, G., & Jaramillo, D. (2016). Basic Thermochemistry in Materials Processing (1 st ed.) Mexico City: Springer.

Rath, S. S., Sahoo, H., Dhawan, N., Rao, D. S., Das, B., & Mishra, B. K. (2014). Optimal Recovery of Iron Values from a Low Grade Iron Ore using Reduction Roasting and Magnetic Separation. Separation Science and Technology, 49, 1927–1936.

Shao, Y., Veasey, T. J., & Rowson, N. A. (1996). Wet High Intensity Magnetic Separation of Iron Minerals. Magnetic and Electrical Separation, 8, 41–51.

Sharma, J., & Sharma, T. (2014). Beneficiation of Low Grade Iron Ore Fines by Magnetizing Roasting. International Journal of Engineering Research and Science & Technology, 3, 59–64.

Sheldon, R. P. (1964). Relation between specific gravity and iron content of rocks from the Red Mountain Formation. Alabama: Geological Survey Bulletin 1182-D, Washington.

Yu, J., Han, Y., Li, Y., & Gao, P. (2017). Beneficiation of an Iron Ore Fines by Magnetization Roasting and Magnetic Separation. International Journal of Mineral Processing, 168, 102–108.

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Publicado

28/12/2022

Como Citar

Neuppmann, P. H., & da Luz, J. A. M. (2022). Magnetic separation of roasted hematitic ore. HOLOS, 6. https://doi.org/10.15628/holos.2022.10055

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