Print Email Facebook Twitter Counteracting ring formation in rotary kilns Title Counteracting ring formation in rotary kilns Author Pisaroni, M. Sadi, R. Lahaye, D. Faculty Electrical Engineering, Mathematics and Computer Science Abstract Avoiding the formation of rings in rotary kilns is an issue of primary concern to the cement production industry. We developed a numerical combustion model that revealed that in our case study rings are typically formed in zones of maximal radiative heat transfer. This local overheating causes the overproduction of the liquid phase of the granular material that tends to stick to the oven’s wall and to form rings. To counteract for this phenomenon, we propose to increase the amount of secondary air injected to cool the oven. Experimental validation at the plant has repeatedly shown that our solution is indeed effective. For the first time in years, the kiln has been operation without unscheduled shut-downs, resulting in hugely important cost savings. To reference this document use: http://resolver.tudelft.nl/uuid:7ed292c2-4f30-4b67-a2bc-92de72bb2d92 Publisher Delft University of Technology, Faculty of Electrical Engineering, Mathematics and Computer Science, Department of Applied Mathematical Analysis ISSN 1389-6520 Source Reports of the Department of Applied Mathematical Analysis, 12-04 Part of collection Institutional Repository Document type report Rights (c)2012 Pisaroni, M., Sadi, R., Lahaye, D. Files PDF 12-04_Domenico_counteract ... ersion.pdf 1.71 MB Close viewer /islandora/object/uuid:7ed292c2-4f30-4b67-a2bc-92de72bb2d92/datastream/OBJ/view