Experimental study of mineral particle deposition in cement production process

X. Z. Wang, P. A. Jensen, M. N. Pedersen, H. S. Zhou, H. Wu*

*Corresponding author for this work

Research output: Contribution to conferencePaperResearchpeer-review

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Abstract

Particle deposition is one of the main operational problems in cement production process, which may cause unscheduled outage of a plant. This paper aims to improve the currently limited understanding of mineral particle deposition formation in cement production. Experiments with cement mineral materials were conducted in a laboratory-scale entrained flow reactor (EFR). Two different deposit probe systems, one low probe surface temperature (LPST) system with probe surface temperature of 500℃-700℃ and one high probe surface temperature (HPST) system with probe surface temperature from 1000℃ to 1200℃, were utilized to simulate the temperature conditions in preheater cyclone and calciner, respectively. The effect of fed materials (raw meal, hot meal, bypass dust), flue gas temperature (from 830℃ to 1200℃), deposit probe surface temperature (from 550℃ to 1200℃), and flue gas velocity (from 0.9 m/s to 2.67 m/s) on deposit formation rate were studied. The results reveal that in LPST experiments, increasing flue gas temperature from 830℃ to 1080℃ and correspondingly probe surface temperature from 576℃ to 737℃ increased significantly the deposit formation rate of bypass dust, but showed little influence on that of raw meal. However, in HPST experiments, increasing the flue gas and deposit probe temperature from 1000℃ to 1200℃ increased deposit formation rate of all three materials. Furthermore, the deposit mechanisms in experiments were evaluated, indicating that in LPST experiments the inertial impaction, thermophoresis and condensation play a role, however, only inertial impaction shows an effect in HPST experiment
Original languageEnglish
Publication date2021
Publication statusPublished - 2021
Event10th European Combustion Meeting - Virtual conference
Duration: 14 Apr 202115 Apr 2021

Conference

Conference10th European Combustion Meeting
LocationVirtual conference
Period14/04/202115/04/2021

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