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- W1454025148 abstract "Thorough mixing of particles in the transverse plane of a rotary kiln is fundamental to the uniform heating or cooling of the charge and, ultimately, to the generation of a homogeneous product. However, differences in particle size and density result in a de-mixing process whereby smaller or denser particles segregate to form an inner core or kidney of segregated material which may never reach the bed surface to be exposed to freeboard temperatures. This chapter describes an analytical model and develops its numerical solution, which relates particle segregation rates to primary operating parameters such as rotary kiln diameter, bed depth, and rotational speed. The model considers a binary mixture of small and large particles in the continuously shearing active region of the kiln bed. Continuum equations are employed to describe the mixing and segregation rates in the transverse plane of the bed that result from both particle percolation and diffusional mixing. The granular flow model provides the flow field needed for the convective terms for material concentration and the diffusion coefficients. The percolation velocities are generated using existing models that relate percolation to the probability of void formation in the shear plane." @default.
- W1454025148 created "2016-06-24" @default.
- W1454025148 creator A5077549335 @default.
- W1454025148 date "2008-01-01" @default.
- W1454025148 modified "2023-09-23" @default.
- W1454025148 title "Mixing and Segregation" @default.
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- W1454025148 doi "https://doi.org/10.1016/b978-075067877-3.50007-6" @default.
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