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Mathematical modeling of the flash converting process

Abstract

An axisymmetric mathematical model for the Kennecott-Outokumpu flash converting process for converting solid copper matte to copper is presented. The model is an adaptation of the comprehensive mathematical model formerly developed at the University of Utah for the flash smelting of copper concentrates. The model incorporates the transport of momentum, heat, mass, and reaction kinetics between gas and particles in a particle-laden turbulent gas jet. The standard k-{epsilon} model is used to describe gas-phase turbulence in an Eulerian framework. The particle-phase is treated from a Lagrangian viewpoint which is coupled to the gas-phase via the source terms in the Eulerian gas-phase governing equations. Matte particles were represented as Cu{sub 2}S yFeS, and assumed to undergo homogeneous oxidation to Cu{sub 2}O, Fe{sub 3}O{sub 4}, and SO{sub 2}. A reaction kinetics mechanism involving both external mass transfer of oxygen gas to the particle surface and diffusion of oxygen through the porous oxide layer is proposed to estimate the particle oxidation rate Predictions of the mathematical model were compared with the experimental data collected in a bench-scale flash converting facility. Good agreement between the model predictions and the measurements was obtained. The model was used to study the effect of different gas-injection configurations  More>>
Authors:
Sohn, H Y; Perez-Tello, M; Riihilahti, K M [1] 
  1. Utah Univ., Salt Lake City, UT (United States)
Publication Date:
Dec 31, 1996
Product Type:
Conference
Report Number:
TKK-V-B117; CONF-9606318-
Reference Number:
SCA: 360101; 400800; PA: FI-97:003299; EDB-97:061744; SN: 97001773798
Resource Relation:
Conference: 3. colloquium on process simulation, Espoo (Finland), 11-14 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of The 3rd colloquium on process simulation. Proceedings; Jokilaakso, A. [ed.]; PB: 359 p.
Subject:
36 MATERIALS SCIENCE; 40 CHEMISTRY; PYROMETALLURGY; COPPER; METAL INDUSTRY; CHEMICAL REACTION KINETICS; OXIDATION; FURNACES
OSTI ID:
464562
Research Organizations:
Helsinki Univ. of Technology, Otaniemi (Finland). Lab. of Materials Processing and Powder Metallurgy
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE97740683; ISBN 951-22-3092-5; TRN: FI9703299
Availability:
OSTI as DE97740683
Submitting Site:
FI
Size:
pp. 189-217
Announcement Date:

Citation Formats

Sohn, H Y, Perez-Tello, M, and Riihilahti, K M. Mathematical modeling of the flash converting process. Finland: N. p., 1996. Web.
Sohn, H Y, Perez-Tello, M, & Riihilahti, K M. Mathematical modeling of the flash converting process. Finland.
Sohn, H Y, Perez-Tello, M, and Riihilahti, K M. 1996. "Mathematical modeling of the flash converting process." Finland.
@misc{etde_464562,
title = {Mathematical modeling of the flash converting process}
author = {Sohn, H Y, Perez-Tello, M, and Riihilahti, K M}
abstractNote = {An axisymmetric mathematical model for the Kennecott-Outokumpu flash converting process for converting solid copper matte to copper is presented. The model is an adaptation of the comprehensive mathematical model formerly developed at the University of Utah for the flash smelting of copper concentrates. The model incorporates the transport of momentum, heat, mass, and reaction kinetics between gas and particles in a particle-laden turbulent gas jet. The standard k-{epsilon} model is used to describe gas-phase turbulence in an Eulerian framework. The particle-phase is treated from a Lagrangian viewpoint which is coupled to the gas-phase via the source terms in the Eulerian gas-phase governing equations. Matte particles were represented as Cu{sub 2}S yFeS, and assumed to undergo homogeneous oxidation to Cu{sub 2}O, Fe{sub 3}O{sub 4}, and SO{sub 2}. A reaction kinetics mechanism involving both external mass transfer of oxygen gas to the particle surface and diffusion of oxygen through the porous oxide layer is proposed to estimate the particle oxidation rate Predictions of the mathematical model were compared with the experimental data collected in a bench-scale flash converting facility. Good agreement between the model predictions and the measurements was obtained. The model was used to study the effect of different gas-injection configurations on the overall fluid dynamics in a commercial size flash converting shaft. (author)}
place = {Finland}
year = {1996}
month = {Dec}
}