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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-472-4

ISBN Online: 978-1-56700-471-7

3rd Thermal and Fluids Engineering Conference (TFEC)
March, 4–7, 2018, Fort Lauderdale, FL, USA

AXIAL SOLID TRANSPORT IN ROTARY KILNS − INFLUENCE OF OPERATIONAL PARAMETERS

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DOI: 10.1615/TFEC2018.tff.020961

摘要

Rotary kilns are widely used as industrial equipment for the thermal processing of different bulk bed systems such as calcination, sintering and pyrolysis. Granular bed motion analysis will be used to improve the research of heat and mass transfer inside rotary kilns. A technical scale rotary kiln with 5 m length and 0.4 m inner diameter was used to study the transient behavior of the axial bulk bed profile. A new experimental method was introduced to continuously measure bed depth during the transient process using image analysis methods. Quartz sand was used as test material and the parameters of interest were the rotational speed and the inclination angle of the kiln. During the experiments, the discharge mass flow rates, bed depth profiles and stationary time were measured continuously. These experimental results are used to validate a theoretical dynamic model for bed depth profile simulations. So the local heat transfer surface of the free and covered bulk bed can be described over the total length of the kiln, which is important for the analysis of processes in rotary kilns.