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Mathematical Modeling of the Combined Turbulent Transport Phenomena, Chemical Reactions, and Thermal Radiation in a Flash-furnace Shaft.

Authors
Hahn-YB; Sohn-HY
Source
Paper in Mathematical Modeling of Materials Processing Operations Metall Soc 1987 :36 pages
Link
NIOSHTIC No.
10008704
Abstract
A mathematical model has been developed to describe the processes occurring in an axisymmetric flash furnace shaft. The model incorporates turbulent fluid dynamics, chemical reaction kinetics, and heat and mass transfer. The key features include the use of the k-e turbulence model, incorporating the effect of particles on the turbulence, and the four-flux model for the radiative heat transfer. The model predictions were compared with experimental data obtained from an outokumpu pilot flash furnace. Good agreement was obtained between the predicted and measured data in terms of gas-phase temperature and so2 and o2 concentrations. The model predictions show that reactions of sulfide particles are almost completed in the upper zone of the furnace within about 1 m of the burner, and the double-entry burner system with radial feeding of the concentrate- laden distribution air gives better performance than the single- entry burner system. Model predictions also showed that radiation between particles and their surroundings is the dominant mode of heat transfer in the flash-smelting furnace.
Publication Date
19870101
Document Type
IH; Final Contract Report;
Fiscal Year
1987
NTIS Accession No.
NTIS Price
Identifying No.
MIR 41-90
NIOSH Division
WO;
Source Name
Paper in Mathematical Modeling of Materials Processing Operations; Metall. Soc., 1987, 799-834
State
UT;
Performing Organization
University of Utah
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