Estimation of Waste Heat from Exhaust Gases of an Iron Ore Pelletizing Plant in Iran

Document Type : Research Article


1 Department of Energy, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran

2 Mechanical Engineering Department, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran

3 Golgohar Iron Ore and Steel Research Institute, Golgohar Mining and Industrial Company, Sirjan, Iran


Waste heat from the exhaust gases of Golgohar iron ore pelletizing Plant, in Sirjan, Iran, was studied using energy analysis based on input data extracted from measurements in a 5-month period. Constituents considered as inputs were fresh air, natural gas, green and indurated pellets, while the exhaust flue gas and hot indurated pellets were served as the output. Contribution of each part to energy production and/or consumption was separately determined, in addition to the energy produced from burning of natural gas and pyrite and magnetite oxidation to hematite. Special consideration was devoted to the energy leaving the furnace through exhaust flue gases as the main source of waste heat in addition to the latent heat of water vapor, the energy stored in materials such as indurated pellets, rail pallets and cooling water, and radiation from the furnace body. It was observed that the dominant portion of waste heat is in the form of thermal energy carried by flue gases generated from combustion which are released into the atmosphere. The present study can be considered as a case study for a specific plant which gives insights on how to handle and analysis the waste heat recovery of such plans in general.


Main Subjects

[1] S. Brückner, S. Liu, L. Miró, M. Radspieler, L. F. Cabeza, E. Lävemann, Industrial waste heat recovery technologies: an economic analysis of heat transformation technologies, Applied Energy, 151 (2015) 157-167.
[2] S. Brueckner, L. Miró, L. F. Cabeza, M. Pehnt, E. Laevemann, Methods to estimate the industrial waste heat potential of regions–A categorization and literature review, Renewable and Sustainable Energy Reviews, 38 (2014) 164-71.
[3] F. Vitoretti, J. A. De Castro, Study of the induration phenomena in single pellet to traveling grate furnace, Journal of Materials Research and Technology, 2 (2013) 315-322.
[4] S. Majumder, P. V. Natekar, V. Runkana, Virtual indurator: A tool for simulation of induration of wet iron ore pellets on a moving grate, Computers and Chemical Engineering, 33 (2009) 1141-1152.
[5] M. Barati, Dynamic simulation of pellet induration process in straight-grate system, International Journal of Mineral Processing, 89 (2008) 30-39.
[6] J. x. Feng, Y. Zhang, H. w. Zheng, J. h. Xu, Y. m. Zhang, J. b. Yang, Optimization of pellet production process parameters in grate using simulation results, Journal of Shanghai Jiaotong University (Science), 16 (2011) 219-223.
[7] S. Nordgren, J. Dahl, C. Wang, B. Lindblom, Process integration in an iron ore upgrading process system: analysis of mass and energy flows within a straight grate induration furnace, 18th International Congress of Chemical and Process Engineering, (2008).
[8] S. Sadrnezhaad, A. Ferdowsi, H. Payab, Mathematical model for a straight grate iron ore pellet induration process of industrial scale, Computational Materials Science, 44 (2008) 296-302.
[9] J. Feng, Y. Zhang, H. Zheng, X. Xie, C. Zhang, Drying and preheating processes of iron ore pellets in a traveling grate, International Journal of Minerals, Metallurgy and Materials, 17 (2010) 535-40.
[10] Process Equipment List pelletizing Plant 5.0 Million ton per day, (2006) 1- 403.
[11] Pelletizing Plant 5.0 Million ton per day Operating Manual, (2006) 1- 196.
[12] V. Wylen, J. Gordon, R. E. Sonntag, Fundamentals of Thermodynamics 6th Edition, New York: Wiley, (2002).
[13] V. Chanapathy, Find surface heat loss and flue gas density quickly, Hydrocarbon Process (United States), (1985) 64.
[14] V. Arora. Check fired heater performance, Hydrocarbon Process (United States), (1985), 64-65.