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Metals 2017, 7(4), 132;

Effect of the Impeller Design on Degasification Kinetics Using the Impeller Injector Technique Assisted by Mathematical Modeling

Facultad de Química, UNAM, Departamento de Ingeniería Metalúrgica, Edificio “D” Circuito de los Institutos s/n, Cd. Universitaria, C.P. 04510 Mexico D.F., Mexico
CINVESTAV, Unidad Saltillo, Avenida Industria Metalúrgica No. 1062, Parque Industrial Saltillo-Ramos Arizpe, CP 25900 Ramos Arizpe, Coahuila, Mexico
Author to whom correspondence should be addressed.
Received: 16 February 2017 / Revised: 22 March 2017 / Accepted: 24 March 2017 / Published: 10 April 2017
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A mathematical model was developed to describe the hydrodynamics of a batch reactor for aluminum degassing utilizing the rotor-injector technique. The mathematical model uses the Eulerian algorithm to represent the two-phase system including the simulation of vortex formation at the free surface, and the use of the RNG k-ε model to account for the turbulence in the system. The model was employed to test the performances of three different impeller designs, two of which are available commercially, while the third one is a new design proposed in previous work. The model simulates the hydrodynamics and consequently helps to explain and connect the performances in terms of degassing kinetics and gas consumption found in physical modeling previously reported. Therefore, the model simulates a water physical model. The model reveals that the new impeller design distributes the bubbles more uniformly throughout the ladle, and exhibits a better-agitated bath, since the transfer of momentum to the fluids is better. Gas is evenly distributed with this design because both phases, gas and liquid, are dragged to the bottom of the ladle as a result of the higher pumping effect in comparison to the commercial designs. View Full-Text
Keywords: mathematical model; degassing; aluminum; impeller design mathematical model; degassing; aluminum; impeller design

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Abreu-López, D.; Amaro-Villeda, A.; Acosta-González, F.A.; González-Rivera, C.; Ramírez-Argáez, M.A. Effect of the Impeller Design on Degasification Kinetics Using the Impeller Injector Technique Assisted by Mathematical Modeling. Metals 2017, 7, 132.

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