title: Valorization of electric arc furnace primary steelmaking slags for cement applications.
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 5wt%, 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.
authors: Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, Republic of Korea.
authors: Hyung-Seok
authors: HS
authors: Kim
authors: Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, Republic of Korea.
authors: Kee-Seok
authors: KS
authors: Kim
authors: Dept. of Materials Science & Engineering, Yonsei University, Seoul 120-749, Republic of Korea.
authors: Sung Suk
authors: SS
authors: Jung
authors: Production Technology Team, Hyundai Steels, Incheon 401-712, Republic of Korea.
authors: Jin Ill
authors: JI
authors: Hwang
authors: Korea Conformity Laboratories, Seoul 153-803, Republic of Korea.
authors: Jae-Seok
authors: JS
authors: Choi
authors: Dept. of Materials Science & Engineering, Yonsei University, Seoul 120-749, Republic of Korea. Electronic address: ilsohn@yonsei.ac.kr.
authors: Il
authors: I
authors: Sohn
mesh_terms: D003252:Construction Materials / Q000032:analysis*; D017745:Incineration; D007220:Industrial Waste / Q000032:analysis*
chemical_list: D007220:Industrial Waste
keywords: Cement addition; Confocal laser scanning microscopy; Electric arc furnace slag; FeO; REAFS