Journal of Northeastern University ›› 2013, Vol. 34 ›› Issue (9): 1277-1281.DOI: -

• Materials & Metallurgy • Previous Articles     Next Articles

Thermal Decomposition Characteristics of Limonite and Their Influences on the Sintering Process

PAN Wen1, WU Keng1, WANG Wenze1, ZHAO Yong1,2   

  1. 1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China; 2. Shougang Research Institute of Technology, Beijing 100041, China.
  • Received:2013-04-01 Revised:2013-04-01 Online:2013-09-15 Published:2013-04-22
  • Contact: WU Keng
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Abstract: The thermal decomposition characteristics of FMGF were investigated by the thermolgravimetric analysis. The experimental investigation showed that the decomposition of crystal water in FMGF completed when the temperatures were in the range of 200~400℃, which improved the gas permeability of the sintering layers that the heat from upper layers transferred to the lower layers effectively. The crystal water was decomposed so that the effects of crystal water decomposition in the FMGF on the solid fuel consumption and energy balance were reduced. The conclusion made from the thermal decomposition analysis was verified by the sintering pot tests and industrial application, which indicated that the rate of finial products of the sintering was increased and the solid fuel consumption was reduced under high proportion of limonite through increasing the proportion of iron ore fines with low assimilative capacity to improve the gas permeability of the sintering layers and the heat transfer.

Key words: sinter, limonite, thermal decomposition characteristics, solid fuel consumption, utilization coefficient

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