Reduction of electrical arc furnace oxidizing slag by coke under microwave irradiation

Sung Beom An, Minsoo Shin, Ki Joo Sim, Joonho Lee

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The reduction of iron from electrical arc furnace oxidizing slag by coke was investigated under microwave irradiation (1.7 kW, 2.45 GHz). The heating behavior of cokes of different sizes were examined and a maximum heating rate of 550 K/min and a maximum temperature of 1783 K were obtained with coke particles smaller than 75 m. In the reduction of the oxidizing slag (15 g) by coke (1.45∼1.65 g) under microwave irradiation for 25 min, the maximum recovery ratio of iron was 0.87, obtained when the amount of coke addition was 1.55 g. In addition, the reduced slag composition was modified by adding 5.9 g of CaO. With the addition of 1.55 g coke or more, free CaO in the slag was effectively reduced.

Original languageEnglish
Pages (from-to)351-355
Number of pages5
JournalMetals and Materials International
Volume20
Issue number2
DOIs
Publication statusPublished - 2014 Mar

Keywords

  • X-ray diffraction
  • microwave irradiation
  • oxides
  • recovery
  • recycling

ASJC Scopus subject areas

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

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