Microwave-assisted grinding of high TiO2 blast furnace slag

Yan Chen, Chen Guang Bai, Yi Zhu He, Noboru Yoshikawa, Shoji Taniguchi

Research output: Contribution to journalArticlepeer-review


One effective way to reduce the TiO2 content in the blast furnace (BF) high TiO2 slag is to separate CaTiO3 from the slag. In order to save the required energy for grinding the slag, the compressive strength of the slag is reduced by inducing cracks in it with the help of microwave. The slag could effectively be heated in the microwave field i and crack was induced in it. The crack propagation occurs with the increasing of microwave processing time. In order to investigate the effect of induced cracks on grinding of the slag, compression test was done. The result shows that the compressive strength of the slag is effectively decreased when crack is induced in it (the compressive strength of the slag is decreased by about 20% after 5 cycles, for 5min microwave processing). The compressive strength of the slag decreases with the increase of the microwave processing time and the thermal cycle number. But the thermal cycle number of microwave processing affects the compressive strength of the slag more effectively.

Original languageEnglish
Pages (from-to)5-8
Number of pages4
JournalJournal of Iron and Steel Research
Issue number8
Publication statusPublished - 2006 Aug 1


  • Compressive strength
  • Crack
  • High TiO BF slag
  • Microwave

ASJC Scopus subject areas

  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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