Valorization of electric arc furnace primary steelmaking slags for cement applications

Hyung Seok Kim, Kee Seok Kim, Sung Suk Jung, Jin Ill Hwang, Jae Seok Choi, Il Sohn

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

To produce supplementary cementitious materials from electric arc furnace (EAF) slags, FeO was reduced using a two-stage reduction process that included an Al-dross reduction reaction followed by direct carbon reduction. A decrease in FeO was observed on tapping after the first-stage reduction, and further reduction with a stirred carbon rod in the second-stage reduction resulted in final FeO content below 5. wt%, which is compatible with cement clinker applications. The reduced electric arc furnace slags (REAFS) mixed with cement at a unit ratio exhibited physical properties comparable to those of commercialized ground granulated blast furnace slags (GGBFS). Confocal laser scanning microscopy (CLSM) was used to obtain fundamental information on the cooling characteristics and conditions required to obtain amorphous REAFS. REAFS can be applied in cement mixtures to achieve the hydraulic properties needed for commercial use.

Original languageEnglish
Pages (from-to)85-93
Number of pages9
JournalWaste Management
Volume41
DOIs
Publication statusPublished - 2015 Jul 1

All Science Journal Classification (ASJC) codes

  • Waste Management and Disposal

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