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Microstructure of solid phase reduction on manganese oxide ore fines containing coal by microwave heating

  • Jin Chen
  • Peng-fei Tian
  • Xiu-an Song
  • Ning Li
  • Jian-xiong Zhou
Article

Abstract

Microstructure of solid phase reduction on manganese oxide ore fines containing coal (MOOFCC) is one of important kinetics conditions of influencing microwave heating. On condition that an atomic molar ratio of rO: rC- in MOOFCC is 1 : 1.06 as well as a molecular molar ratio of \({r_{{\rm{Si}}{{\rm{O}}_{\rm{2}}}}}\) : rCaO is 1: 1.28, 1 kg of MOOFCC is heated by microwave to reach 1000–1300 °C and hold different time respectively. Experiments show that the metal phase takes the iron-based metal compounds containing manganese as the main content. The manganese content of metal phase increases with the rise of temperature. The particle size of the metal phase is within the range from 0.01 to 0.05 mm. MO2 phase in the stuff is entirely changed into MnO phase and the slag phase is mainly composed of wollastonite and manganese olivine. The stuff reduced is loose and massive as a whole and its porosity is from 30% to 45%. The low softening-melting property and the low density of the stuff impact, to some degree, the solid phase reduction of powder by microwave heating.

Key words

manganese oxide ore fines containing coal microwave heating solid phase reduction microstructure 

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Copyright information

© China Iron and Steel Research Institute Group 2010

Authors and Affiliations

  • Jin Chen
    • 1
  • Peng-fei Tian
    • 1
  • Xiu-an Song
    • 1
  • Ning Li
    • 1
  • Jian-xiong Zhou
    • 2
  1. 1.School of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan, ShanxiChina
  2. 2.Institute of Mineral ResourceChinese Academy of Geological ScienceBeijingChina

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