Carbothermic reduction of zinc ferrite by microwave heating

Xin Wang, Shao Hua Ju, C. Srinivasakannan, Da Jin Yang, Jin Hui Peng

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The kinetics of carbothermic reduction of ZnFe2O4 in the temperature range 823-1223 K, was investigated in a microwave reactor. The mechanism of formation of ZnO and Fe3O4/FeO by decomposition of ZnFe2O4 was explained using the equilibrium calculations and thermodynamics analysis using HSC chemistry software 6.0. In addition the effect of parameters such as the decomposition temperature, C/ZnFe2O4 ratio, particle size and microwave power were assessed on the decomposition kinetics. Zn recovery as high as 98.83% could be achieved at a decomposition temperature of 1023 K, C/ZnFe 2O4 ratio of 1:3, particle size of +74-61 μm and microwave power of 1200 W. The kinetics of decomposition was found to be carbon gasification reaction controlled, with the activation energy of 39.21 kJ/mol.

Original languageBritish English
Pages (from-to)485-491
Number of pages7
JournalHigh Temperature Materials and Processes
Volume32
Issue number5
DOIs
StatePublished - 25 Oct 2013

Keywords

  • activation energy
  • HSC chemistry software 6.0
  • kinetics
  • microwave
  • thermodynamics
  • zinc ferrite

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