Effect of High Gas Flowrates on the Performance of a Counter-Current Reaction Launder (CCRL) Process for Metal Refining
Experimental results of 3-phase mixing in a physical model of a CCRL for metals refining, at high levels of bottom gas injection (up to a superfIcial gas velocity (Us) of 12.5 cm/min), are presented. A thermal tracer technique was used to elucidate both longitudinal mixing and interphase heat transfer. The results indicate that even under conditions of significant bottom gas injection, it should be possible to maintain acceptably low longitudinal mixing (D. < 20 cm2/s and D/uL < 0.1) in the CCRL. Interphase mass-transfer coefficients of the order of 0.02 cm/s and higher, are predicted from the measured interphase heat transfer coefficients using the mass and heat transfer analogy. Adequate performance is likely to be possible for an industrial CCRL, based on extrapolation of these results to full-scale conditions.
K. N. Swamy et al., "Effect of High Gas Flowrates on the Performance of a Counter-Current Reaction Launder (CCRL) Process for Metal Refining," Proceedings of the TMS EPD Congress (1996, Anaheim, CA), pp. 95-108, The Minerals, Metals & Materials Society (TMS), Feb 1996.
TMS EPD Congress 1996 (1996: Feb. 4-9, Anaheim, CA)
Materials Science and Engineering
Keywords and Phrases
Countercurrent Processes; Flow Rate; Gas Injection; Heat Transfer; Laboratory Study; Mass Transfer; Mixing; Process Variables; Reaction Kinetics; Refining; Tracers; Metallurgy
Article - Conference proceedings
© 1996 The Minerals, Metals & Materials Society (TMS) , All rights reserved.
This document is currently not available here.