THE NATURES OF ZINC SULFIDE CONCENTRATES AND ITS BEHAVIOR AFTER ROASTING PROCESS
DOI:
https://doi.org/10.30556/imj.Vol21.No2.2018.698Keywords:
concentrate, zinc sulfide, sphalerite, galena, chalcopyriteAbstract
The sample used for this study was a sulfide flotation concentrate that came from PT Lumbung Mineral Sentosa.The phase changes that occur in the particles of zinc sulfide concentrate during roasting in a muffle furnace were investigated using light microscopy, X-ray diffraction (XRD), and Scanning Electron Microscopy (SEM) with Energy Dispersive Spectroscopy (EDS) while its chemical composition was analyzed using atomic absorption spectroscopy (AAS) and X-ray fluorescence (XRF) methods. Characterization also employed DTA-TGA instrument to provide data on the transformations that have occurred while the TGA data presents information about physical and chemical phenomena. Mineral composition of the sample included sphalerite, galena, chalcopyrite, and pyrite. Sphalerite was the most dominant one. Roasting sphalerite samples was intended to release the sulfur from its sulfide, Such a release was made easier for further treatment of the zinc such as a leaching process. Roasting temperature varied from 200 - 1,100 °C. Sphalerite starts to change when the temperature was raised to 650 °C performing the formation of zincite, franklinite, quartz and sphalerite as well. This composition did not change although the temperature increased to 1,100 °C. The Zn content within the original sample was 59.00% and then increased with the increasing of temperature but the improved in line with the increased temperature. The highest Zn was 78.98% achieved at 1,100 °C.References
Baba, A. A. and Adekola, F. A. (2011) “Beneficiation of a Nigerian sphalerite mineral: Solvent extraction of zinc by Cyanex®272 in hydrochloric acid,” Hydrometallurgy, 109(3–4), pp. 187–193. doi: 10.1016/j.hydromet.2011.06.004.
BBC (2016) Reactivity series, www.bbc.co.uk. Available at: http://www.bbc.co.uk/education (Accessed: February 18, 2016).
Boyanov, B. S. and Peltekov, A. B. (2013) “Study of zinc sulfide concentrates by DTA, TGA, and X-Ray analyses and their roasting in fluidized bed furnace,” ISRN Industrial Engineering, 2013, pp. 1–8. doi: 10.1155/2013/719759.
Filippou, D. (2004) “Innovative hydrometallurgical prcesses for the primary processing of zinc,” Mineral Processing and Extractive Metallurgy Review, 25(3), pp. 205–252. doi: 10.1080/08827500490441341.
Földvári, M. (2011) Handbook of thermogravimetric system of minerals and its use in geological practice. Budapest: Innova-Print Kft.
Hutabarat, I., Schnideritsch, H., Poscher, A., Sobotka, C. and Antrekowitsch, H. (2015) “Characterisation and thermal behaviour of Indonesian copper sulphides for leaching process,” in Proceeding European Metallurgical Conference Volume 1. Düsseldorf, Germany: Papierflieger, pp. 171–188.
Khattar, D., Dudeja, R. and Arora, K. K. (2011) “Chemical bond,” in The Pearson Complete Guide to the All India Engineering Entrance Examination. 4th Ed. Delhi, India: Dorling Kindersley Pvt. Ltd., p. C-96-C-101.
McLeod, C. (2017) Zinc applications and new demand sources, Zinc Investing News. Available at: https://investingnews.com/daily/resource-investing/base-metals-investing/zinc-investing/zinc-applications-zinc-demand/.
Runkel, M. and Sturm, P. (2009) “Pyrite roasting, an alternative to sulphur burning,” The Journal of The Southern African Institute of Mining and Metallurgy, 109, pp. 491–496. Available at: http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S2225-62532009000800007.
de Souza, A. D., Pina, P. S. and Leão, V. A. (2007) “Bioleaching and chemical leaching as an integrated process in the zinc industry,” Minerals Engineering, 20(6), pp. 591–599. doi: 10.1016/j.mineng.2006.12.014.
de Souza, A. D., Pina, P. S., Santos, F. M. F., da Silva, C. A. and Leão, V. A. (2009) “Effect of iron in zinc silicate concentrate on leaching with sulphuric acid,” Hydrometallurgy, 95(3–4), pp. 207–214. doi: 10.1016/j.hydromet.2008.05.049.
Stanton, R. L. (1994) Ore elements in arc lavas. Clarendon Press.
Zhang, Y., Deng, J., Chen, J., Yu, R. and Xing, X. (2014) “The electrowinning of zinc from sodium hydroxide solutions,” Hydrometallurgy, 146, pp. 59–63. doi: 10.1016/j.hydromet.2014.03.006.
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