Author:
Pisaroni M,Sadi R,Lahaye D
Abstract
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 an overproduction of the liquid phase of the granular material, which 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 confirmed that our solution is indeed effective. For the first time in years, the kiln has been operating without unscheduled shut-downs, resulting in hugely important cost savings.
Publisher
Springer Science and Business Media LLC
Reference20 articles.
1. Boateng AA: Rotary Kilns: Transport Phenomena and Transport Processes. Butterworth-Heinemann, Stoneham; 2006.
2. Mastorakos E, Massias A, Tsakiroglou CD, Goussis DA, Burganos VN, Payatakes AC: CFD predictions for cement kilns including flame modelling, heat transfer and clinker chemistry. Appl Math Model 1999,23(1):55–76. 10.1016/S0307-904X(98)10053-7
3. Marias F, Roustan H, Pichat A: Modelling of a rotary kiln for the pyrolysis of aluminium waste. Chem Eng Sci 2005,60(16):4609–4622. 10.1016/j.ces.2005.03.025
4. Giannopoulos D, Kolaitis DI, Togkalidou A, Skevis G, Founti MA: Quantification of emissions from the co-incineration of cutting oil emulsions in cement plants: part i: NO
x
, CO and VOC. Fuel 2007,86(7–8):1144–1152. 10.1016/j.fuel.2006.10.025
5. Tran HN, Barham D: An overview of ring formation in lime kilns. Tappi J 1991,74(1):131–136.
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