Pilot scale production of novel calcium sulfoaluminate cement clinkers and development of thermal model

Sameer Khare; Marcus C. Bannerman; Fredrik Glasser; Theodore Hanein; Mohammed S. Imbabi

doi:10.1016/j.cep.2017.10.006

Pilot scale production of novel calcium sulfoaluminate cement clinkers and development of thermal model

Sameer Khare, Marcus C. Bannerman, Fredrik Glasser, Theodore Hanein, Mohammed S. Imbabi

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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.

Original language	English
Pages (from-to)	68-75
Number of pages	8
Journal	Chemical Engineering and Processing
Volume	122
Early online date	16 Oct 2017
DOIs	https://doi.org/10.1016/j.cep.2017.10.006
Publication status	Published - Dec 2017

Bibliographical note

The authors gratefully acknowledge the financial support of Gulf Organisation for Research and Development (GORD), University of Aberdeen grant number EG016-RG11757. They also offer sincere thanks to Dr Thomas Matschei and Mr Guanshu Li at LafargeHolcim for the stimulating discussions relating to future commercial development of CSA. Finally, the authors wish to thank the engineering and operational support team at IBU-tec, who helped to manage and carry out the pilot-scale trials.

Keywords

CSA cement clinker
rotary kiln
thermal performance
modelling
sulfur combustion

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Accepted Manuscript
© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 573 KBLicence: CC BY-NC-ND

Marcus Campbell Bannerman
- Engineering, Engineering - Senior Lecturer
- Engineering, National Decommissioning Centre
Person: Academic

Cite this

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title = "Pilot scale production of novel calcium sulfoaluminate cement clinkers and development of thermal model",

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.",

keywords = "CSA cement clinker, rotary kiln, thermal performance, modelling, sulfur combustion",

author = "Sameer Khare and {C. Bannerman}, Marcus and Fredrik Glasser and Theodore Hanein and Imbabi, {Mohammed S.}",

note = "The authors gratefully acknowledge the financial support of Gulf Organisation for Research and Development (GORD), University of Aberdeen grant number EG016-RG11757. They also offer sincere thanks to Dr Thomas Matschei and Mr Guanshu Li at LafargeHolcim for the stimulating discussions relating to future commercial development of CSA. Finally, the authors wish to thank the engineering and operational support team at IBU-tec, who helped to manage and carry out the pilot-scale trials.",

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doi = "10.1016/j.cep.2017.10.006",

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AU - Khare, Sameer

AU - C. Bannerman, Marcus

AU - Glasser, Fredrik

AU - Hanein, Theodore

AU - Imbabi, Mohammed S.

N1 - The authors gratefully acknowledge the financial support of Gulf Organisation for Research and Development (GORD), University of Aberdeen grant number EG016-RG11757. They also offer sincere thanks to Dr Thomas Matschei and Mr Guanshu Li at LafargeHolcim for the stimulating discussions relating to future commercial development of CSA. Finally, the authors wish to thank the engineering and operational support team at IBU-tec, who helped to manage and carry out the pilot-scale trials.

PY - 2017/12

Y1 - 2017/12

N2 - 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.

AB - 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.

KW - CSA cement clinker

KW - rotary kiln

KW - thermal performance

KW - modelling

KW - sulfur combustion

U2 - 10.1016/j.cep.2017.10.006

DO - 10.1016/j.cep.2017.10.006

M3 - Article

SN - 0255-2701

VL - 122

SP - 68

EP - 75

JO - Chemical Engineering and Processing

JF - Chemical Engineering and Processing

ER -

Pilot scale production of novel calcium sulfoaluminate cement clinkers and development of thermal model

Abstract

Bibliographical note

Keywords

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Marcus Campbell Bannerman

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