Hanein, T. orcid.org/0000-0002-3009-703X, Hayashi, Y., Utton, C. et al. (4 more authors) (2020) Pyro processing cement kiln bypass dust : enhancing clinker phase formation. Construction and Building Materials, 259. 120420. ISSN 0950-0618
Abstract
The valorisation of cement kiln bypass dust (CBPD) is explored for sustainable production of cementitious clinker phases. CBPD can replace the calcareous component in cement manufacture and allow for a reduction in CO2 emissions, as the calcium component in CBPD is mostly decarbonised. CBPD was heated with/out the addition of alumina or silica at temperatures of 900 – 1100 °C to produce clinker phases. Belite and mayenite formed at temperatures as low as 900 °C, while alite formation was achieved at 1200 °C, which is significantly lower than is conventional (~1450 °C). Alite is thermodynamically stable only above 1250 °C; thus, the reduced temperature is potentially owing to the presence of chloride found in the CBPD (as KCl) which was also simultaneously removed through pyro processing at 1100 – 1200 °C. The investigation also confirmed that the formation of belite is enhanced in the presence of molten KCl.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 Elsevier. This is an author produced version of a paper subsequently published in Construction and Building Materials. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | Cement kiln bypass dust; Cement manufacture; Clinker; Pyro processing; Waste valorisation; Low-carbon clinker |
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 Engineering and Physical Science Research Council EP/R025959/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 03 Sep 2020 08:50 |
Last Modified: | 03 Sep 2021 00:40 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.conbuildmat.2020.120420 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:165081 |