You need JavaScript to view this

Modelling of chalcopyrite oxidation reactions in the Outokumpu flash smelting process

Abstract

A mathematical model for simulating oxidation reactions of chalcopyrite particles together with momentum, heat and mass transfer between particle and gas phase in a flash smelting furnace reaction shaft is presented. In simulation, the equations governing the gas flow are solved numerically with a commercial fluid flow package, Phoenics. The particle phase is introduced into the gas flow by a Particle Source In Cell (PSIC) - technique, where a number of discrete particles is tracked in a gas flow and the relevant source terms for momentum, mass, and heat transfer are added to the gas phase equations. The gas phase equations used are elliptic in nature and the fluid turbulence is described by the (k-{epsilon}) -model. Thermal gas phase radiation is simulated with a six-flux radiation model. The chemical reactions of concentrate particles are assumed to happen at two sharp interfaces, and a shrinking core model is applied to describe the mass transfer of chemical species through the reaction product layer. In a molten state, the oxygen consumption is controlled by a film penetration concept. The reacting concentrate particles are a mixture of chalcopyrite and silica. Also a certain amount of pure inert silica is fed to the process as  More>>
Authors:
Ahokainen, T; Jokilaakso, A [1] 
  1. Helsinki Univ. of Technology, Otaniemi (Finland)
Publication Date:
Dec 31, 1996
Product Type:
Conference
Report Number:
TKK-V-B117; CONF-9606318-
Reference Number:
SCA: 360101; 400800; PA: FI-97:003298; EDB-97:061743; SN: 97001773792
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; SMELTING; COMPUTERIZED SIMULATION; GAS FLOW; METAL INDUSTRY; FURNACES; FLOW MODELS; COMBUSTION KINETICS; CHALCOPYRITE; PYROMETALLURGY
OSTI ID:
464561
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: FI9703298
Availability:
OSTI as DE97740683
Submitting Site:
FI
Size:
pp. 167-182
Announcement Date:

Citation Formats

Ahokainen, T, and Jokilaakso, A. Modelling of chalcopyrite oxidation reactions in the Outokumpu flash smelting process. Finland: N. p., 1996. Web.
Ahokainen, T, & Jokilaakso, A. Modelling of chalcopyrite oxidation reactions in the Outokumpu flash smelting process. Finland.
Ahokainen, T, and Jokilaakso, A. 1996. "Modelling of chalcopyrite oxidation reactions in the Outokumpu flash smelting process." Finland.
@misc{etde_464561,
title = {Modelling of chalcopyrite oxidation reactions in the Outokumpu flash smelting process}
author = {Ahokainen, T, and Jokilaakso, A}
abstractNote = {A mathematical model for simulating oxidation reactions of chalcopyrite particles together with momentum, heat and mass transfer between particle and gas phase in a flash smelting furnace reaction shaft is presented. In simulation, the equations governing the gas flow are solved numerically with a commercial fluid flow package, Phoenics. The particle phase is introduced into the gas flow by a Particle Source In Cell (PSIC) - technique, where a number of discrete particles is tracked in a gas flow and the relevant source terms for momentum, mass, and heat transfer are added to the gas phase equations. The gas phase equations used are elliptic in nature and the fluid turbulence is described by the (k-{epsilon}) -model. Thermal gas phase radiation is simulated with a six-flux radiation model. The chemical reactions of concentrate particles are assumed to happen at two sharp interfaces, and a shrinking core model is applied to describe the mass transfer of chemical species through the reaction product layer. In a molten state, the oxygen consumption is controlled by a film penetration concept. The reacting concentrate particles are a mixture of chalcopyrite and silica. Also a certain amount of pure inert silica is fed to the process as flux. In the simulations the calculation domain includes the concentrate burner and a cylindrical reaction shaft of an industrial scale flash smelting furnace. Some examples about the simulations carried out by the combustion model are presented. (author)}
place = {Finland}
year = {1996}
month = {Dec}
}