Valorization of Electrical Arc Furnace Oxidizing Slag

  • Joonho Lee
  • Sung Beom An
  • Minsoo Shin
  • Ki Joo Sim
Conference paper

Abstract

Valorization of the electrical arc furnace oxidizing slag by coke was carried out by the reduction of iron oxide in the slag. Since the reduction of iron oxide by solid carbon is an endothermic reaction, supply of heat energy is required. In addition, slag has a low thermal conductivity; traditional fuel injection is not suitable for this reaction. Microwave can be used to supply heat energy to the system. Commercial oxidizing slag was reduced by coke under the microwave irradiation (1.7 kW, 2.45 GHz). The maximum recovery ratio of iron was 87%. In addition, slag composition modification was attempted to use the remaining slag for a mixture in cement clinker. Free-CaO in the slag was successfully suppressed, and the use of the remaining slag as a potential mixture was confirmed.

Keywords

Electrical arc furnace Oxidizing slag Recovery of iron 

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Copyright information

© TMS (The Minerals, Metals & Materials Society) 2014

Authors and Affiliations

  • Joonho Lee
    • 1
  • Sung Beom An
    • 1
  • Minsoo Shin
    • 1
  • Ki Joo Sim
    • 1
  1. 1.Department of Materials Science and EngineeringKorea UniversitySeongbuk-gu, SeoulRepublic of Korea

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