Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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BOF Refining of Fluorspar Substitute Using Iron Oxide Based By-product

산화철계 형석대체제의 전로 정련특성

  • Keum, C.H. (POSCO Technical Research Laboratory) ;
  • Hur, B.Y. (Gyeong Sang National University, Division of Nano Advanced Materials Engineering)
  • Published : 2006.05.27
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Abstract

Fluorspar has been essential flux in steelmaking process. The main effects of fluorspar addition are lowering of the viscosity and melting temperature of slag. In recent years, due to the increasing price and environmental problem of fluorspar, various types of fluorspar substitute have been investigated. In this study, iron oxide by-products such as sinter dust, basic oxygen furnace (BOF) sludge and mill scale were developed as a substitute in terms of waste recycling. Several plant trials were carried out by addition of briquetted substitutes of $4{\sim}6$ kg/ton to compare with the fluorspar of $0.7{\sim}1$ kg/ton. The substitutes showed a similar behavior of slag formation, phosphorus removal and MgO saturation content.

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