Production and properties of ferrite-rich CSAB cement from metallurgical industry residues

Visa Isteri; Katja Ohenoja; Theodore Hanein; Hajime Kinoshita; Pekka Tanskanen; Mirja Illikainen; Timo Fabritius

doi:10.1016/j.scitotenv.2019.136208

Production and properties of ferrite-rich CSAB cement from metallurgical industry residues

Sci Total Environ. 2020 Apr 10:712:136208. doi: 10.1016/j.scitotenv.2019.136208. Epub 2019 Dec 23.

Authors

Visa Isteri¹, Katja Ohenoja², Theodore Hanein³, Hajime Kinoshita³, Pekka Tanskanen¹, Mirja Illikainen², Timo Fabritius⁴

Affiliations

¹ Process Metallurgy, Faculty of Technology, PO Box 4300, 90014 University of Oulu, Finland.
² Fibre and Particle Engineering, Faculty of Technology, PO Box 4300, 90014 University of Oulu, Finland.
³ Department of Materials Science and Engineering, The University of Sheffield, Sheffield S1 3JD, UK.
⁴ Process Metallurgy, Faculty of Technology, PO Box 4300, 90014 University of Oulu, Finland. Electronic address: timo.fabritius@oulu.fi.

PMID: 31931225
DOI: 10.1016/j.scitotenv.2019.136208

Abstract

Blast furnace slag from the steel industry is commercially utilized as a cement replacement material without major processing requirements; however, there are many unutilized steel production slags which differ considerably from the blast furnace slag in chemical and physical properties. In this study, calcium sulfoaluminate belite (CSAB) cement clinkers were produced using generally unutilized metallurgical industry residues: AOD (Argon Oxygen Decarburisation) slag from stainless steel production, Fe slag from zinc production, and fayalitic slag from nickel production. CSAB clinker with a target composition of ye'elimite-belite-ferrite was produced by firing raw materials at 1300 °C. The phase composition of the produced clinkers was identified using quantitative XRD analyses, and the chemical composition of the clinker phases produced was established using FESEM-EDS and mechanical properties were tested through compressive strength test. It is demonstrated that these metallurgical residues can be used successfully as alternative raw materials for the production of CSAB cement that can be used for special applications. In addition, it is shown that the available quantities of these side-streams are enough for significant replacement of virgin raw materials used in cement production.

Keywords: CSA cement; Fayalite slag; Fluorellestadite; Jarosite; Steel making slag; Utilization.