Isteri, V., Ohenoja, K., Hanein, T. orcid.org/0000-0002-3009-703X et al. (6 more authors) (2022) Ferritic calcium sulfoaluminate belite cement from metallurgical industry residues and phosphogypsum : clinker production, scale-up, and microstructural characterisation. Cement and Concrete Research, 154. 106715. ISSN 0008-8846
Abstract
The production of ferrite-rich calcium sulfoaluminate belite (CSABF) cement clinker, also containing MgO, from ladle slag, Fe-slag, and phosphogypsum was translated from a lab-scale to a pilot demonstration in a 7-metre kiln at 1260 °C. An account of the pilot trials/manufacturing is presented, and the process was robust. Laboratory tests prior to scale-up showed that gehlenite formation can be inhibited in the CSABF clinker by adding excess CaO in the raw meal; however, this reduces the amount of iron (Fe) that can be incorporated into ye'elimite and leads to higher ferrite (C6AF2) content. Detailed microstructural analyses were performed on the clinker to reveal the clinker composition as well as the partition of the minor elements. Different ferrite phases with varying amounts of titanium and iron are distinguished. Eighty-five percent of the clinker raw meal was comprised of side-stream materials and the clinker produced in the kiln had chemical raw-material CO2 emissions 90% lower than that of Portland cement made from virgin raw materials. These results can have a significant impact in regions with a prospering metallurgical industry, enabling industrial decarbonisation and resource efficiency.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | CSA cement; minor elements; scale-up; ferrite; clinkering; waste valorisation |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Funding Information: | Funder Grant number UK Research and Innovation MR/V023829/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 24 Jan 2022 07:50 |
Last Modified: | 25 Jan 2022 09:37 |
Status: | Published |
Publisher: | Elsevier BV |
Refereed: | Yes |
Identification Number: | 10.1016/j.cemconres.2022.106715 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:182832 |