THERMAL SCIENCE

International Scientific Journal

THERMAL BEHAVIOR AND KINETICS OF SULFIDE CONCENTRATES

ABSTRACT
Thermal behavior of sulfide concentrates can give rise to many serious problems in its storage and transportation. In order to uncover the thermal behavior of sulfide concentrates, as well as obtain the kinetic parameters, four representative samples were tested using TG-DTG-DSC techniques in the presence of oxygen from 20℃ to 1000℃ and with three different heating rates of 5, 10, and 15℃ per minute. Meanwhile, corresponding activation energies of sulfide concentrates were also determined by the Coats-Redfern method (199.4-234.9 kJmol–1 for Sample 1, 203.6-235.9 kJmol–1 for Sample 2, 234.7-255.6 kJmol–1 for Sample 3, and 199.7-254.9 kJmol–1 for Sample 4). Results indicate that the heating rate is an important factor affecting the thermal behavior of sulfide concentrates. The peak temperature corresponding to the maximum mass loss rate of the ore sample at different heating rates is different and the sulfide concentrates at heating rate of 5℃ per minute is more prone to spontaneous combustion. Furthermore, this thermodynamic method was demonstrated to be effective for investigating and predicting the thermal behavior of sulfide concentrate and the activation energy index was reasonable for determining its spontaneous combustion tendency.
KEYWORDS
PAPER SUBMITTED: 2018-12-28
PAPER REVISED: 2019-02-25
PAPER ACCEPTED: 2019-03-01
PUBLISHED ONLINE: 2019-05-18
DOI REFERENCE: https://doi.org/10.2298/TSCI181228194L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 5, PAGES [2801 - 2811]
REFERENCES
  1. Pan, W., Wu, C., Li, Z., Yang, Y., Self-heating tendency evaluation of sulfide ores based on nonlinear multi-parameters fusion. Transactions of Nonferrous Metals Society of China, 25(2015): 582-589.
  2. Liu, H., Wu, C., Shi, Y., Locating method of fire source for spontaneous combustion of sulfide ores. Journal of Central South University, 2011,18(4), 1034-1040.
  3. Liu, H., Wang, Z., Zhong, J., Xie, Z., Early detection of spontaneous combustion disaster of sulphide ore stockpiles. Tehnicki Vjesnik, 22(2015): 1579-1587.
  4. Yang, F., Wu, C., Li, Z., Investigation of the propensity of sulfide concentrates to spontaneous combustion in storage, Journal of Loss Prevention in the Process Industries, 24(2011): 131-137.
  5. Richard, G., Zhang, D., Thermal stability and kinetics of decomposition of ammonium nitrate in the presence of pyrite, Journal of Hazardous Materials, 165 (2009): 751-758.
  6. Mullet, M., Boursiquot, S., Abdelmoula, M., Génin, J., Ehrhardt, J. Surface chemistry and structural properties of mackinawite prepared by reaction of sulfide ions withmeta. Geochimica et Cosmochimica Acta, 66(2002):829-836.
  7. Álvarez, A., Pizarro, C., García, R., Bueno, J. L., Lavín, A.G., Determination of kinetic parameters for biomass combustion. Bioresource Technology, 216(2016): 36-43.
  8. Liu, H., Zhao, S., Xie, Z., Zhu, K., Xu, X., Ding, X., Glowacz, A., Investigation of the pyrophoric tendency of the powder of corrosion products in an oil tank, Powder Technology, 339(2018): 296-305.
  9. Wang, Y., Guo, P., Dai, F., Li, X., Zhao, Y., Liu, Y., Behavior and modeling of fiber-reinforced clay under triaxial compression by combining the superposition method with the energy-based homogenization technique. International Journal of Geomechanics, 18(2018): 04018172.
  10. Hu, H., Chen, Q., Yin, Z., Zhang, P., Ye, L., Guo, G., Oxidation behaviors of unactivated and mechanically activated sphalerite, The Chinese Journal of Nonferrous Metals, 13(2003):517-521.
  11. Yang, F., Wu, C., Liu, H., Pan, W., Cui, Y., Thermal analysis kinetics of sulfide ores for spontaneous combustion, Journal of Central South University (Science and Technology), 42(2011):2469-2474.
  12. Jones, J.M., Saddawi, A., Dooley, B., Mitchell, E.J.S., Werner, J., Waldron, D.J., Weatherstone, S., Williamse, A., Low temperature ignition of biomass. Fuel Processing Technology, 134(2015): 372-377.
  13. Riaza, J., Álvarez, Lucía, Gil, María V., Khatami, R., Levendis, Y. A., Pis, José J. Ignition behavior of coal and biomass blends under oxy-firing conditions with steam additions. Greenhouse Gases: Science and Technology, 3(2013): 397-414.
  14. Toptas, A., Yildirim, Y., Duman, G., Yanik, J., Combustion behavior of different kinds of torrefied biomass and their blends with lignite. Bioresource Technology, 177(2015): 328-336.
  15. Li, X., Shang, Y.J., Chen, Z.L., Chen, X.F., Niu, Y., Yang, M., Zhang, Y., Study of spontaneous combustion mechanism and heat stability of sulfide minerals powder based on thermal analysis, Powder Technology, 309(2017): 68-73
  16. Iliyas, A., Hawboldt, K., Khan, F., Thermal stability investigation of sulfide minerals in DSC. Journal of Hazardous Materials, 178(2010):814-822.

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence