Khare, S., Bannerman, M.C., Glasser, F.P. et al. (2 more authors) (2017) Pilot scale production of novel calcium sulfoaluminate cement clinkers and development of thermal model. Chemical Engineering and Processing: Process Intensification, 122. pp. 68-75. ISSN 0255-2701
Abstract
Pilot scale trials were successfully performed on the production of novel calcium sulfoaluminate (CSA) cement clinker in a direct natural gas heated rotary kiln at the IBU-tec facility in Germany. A raw meal throughput of ∼25 kg/h was fed to the rotary kiln heated by co-combustion of natural gas and elemental sulfur, with the latter serving as both fuel substitute and reactant, to partially or wholly replace gypsum as the source of sulfur in CSA production. A well-mixed heat transfer kiln model was developed to predict the overall kiln heat flux and gas temperature profiles, to account for gaseous radiative properties. The predicted gas temperature inside the kiln varied from 1566 K in the flame zone to 1019 K at the feed zone, with peak temperature approaching 1724 K. The combined emissivity of the CO2 and H2O gas mixture varied between 0.13 and 0.2 at these temperatures for partial pressure ratio PH2O/PCO2 of 1.7. The trial kiln has a low thermal efficiency of 3% of the total supplied energy.
The simplistic model provided approximate performance predictions for the KDO kiln and also for different kiln sizes and can help to establish the effects of operating parameters on heat transfer trends.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 Elsevier. This is an author produced version of a paper subsequently published in Chemical Engineering and Processing: Process Intensification. 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: | CSA cement clinker; Rotary kiln; Thermal performance; Modelling; Sulfur combustion |
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) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 12 Mar 2021 07:39 |
Last Modified: | 12 Mar 2021 07:39 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.cep.2017.10.006 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:172110 |
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Licence: CC-BY-NC-ND 4.0