Microwave heating characteristics of magnetite ore

Ramaraghavulu Rajavaram, Jaehong Lee, Joon Seok Oh, Han Gyeol Kim, Joonho Lee

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5 Citations (Scopus)

Abstract

The heating characteristics of magnetite ore under microwave irradiation were investigated as a function of incident microwave power, particle size, and magnetite ore mass. The results showed that the heating rate of magnetite ore is highly dependent on microwave power and magnetite ore mass. The maximum heating rate was obtained at a microwave irradiation power of 1.70 kW with a mass of 25 g and particle size between 53-75 µm. The volumetric heating rate of magnetite ore was investigated by measuring the temperature at different depths during microwave irradiation. Microwave irradiation resulted in modification of the microstructure of the magnetite ore, but new phases such as FeO or Fe2O3 were not formed. In addition, the crystal size decreased from 115 nm to 63 nm after microwave irradiation up to 1573 K.

Original languageEnglish
Pages (from-to)1116-1120
Number of pages5
JournalMetals and Materials International
Volume22
Issue number6
DOIs
Publication statusPublished - 2016 Nov 1

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Keywords

  • magnetite ore
  • microstructure
  • microwave irradiation
  • oxides
  • X-ray diffraction

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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