Optimisation of the lance injection desulphurisation of molten iron using dynamic modelling
Pneumatic injection of calcium carbide and, in some cases, fluxes via a submerged lance has become the accepted way to desulphurise crude molten iron, as tapped from a blast furnace or COREX furnace. A number of complex phenomena take place during the injection process which require an investigation...
| Main Authors: | , , |
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| Format: | Journal Article |
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Elsevier
2006
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| Online Access: | http://hdl.handle.net/20.500.11937/16656 |
| _version_ | 1848749238591160320 |
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| author | Scheepers, E. Eksteen, Jacques Aldrich, Chris |
| author_facet | Scheepers, E. Eksteen, Jacques Aldrich, Chris |
| author_sort | Scheepers, E. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Pneumatic injection of calcium carbide and, in some cases, fluxes via a submerged lance has become the accepted way to desulphurise crude molten iron, as tapped from a blast furnace or COREX furnace. A number of complex phenomena take place during the injection process which require an investigation of the kinetics, thermodynamics, transport processes and overall process dynamics of both the molten iron and the top-slag layer to predict the dynamic removal of sulphur from hot metal. A one dimensional model in terms of lance injection depth is presented, which is dynamically updated for the duration of the blow. The model takes into account the kinetics, thermodynamics and transport processes to predict the sulphur levels in the hot metal throughout a blow. A sensitivity analysis is performed to aid in the optimal selection of operating parameters. The model was implemented in MATLAB and calibrated with data from the Mittal Steel plant in Saldanha, South Africa. The modelling results are significant in that it allows the selection of operating conditions to minimize the processing time for desulphurisation, and the minimization of the heat loss (that has to be regained in the subsequent steelmaking operations). |
| first_indexed | 2025-11-14T07:17:46Z |
| format | Journal Article |
| id | curtin-20.500.11937-16656 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:17:46Z |
| publishDate | 2006 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-166562017-05-30T08:07:56Z Optimisation of the lance injection desulphurisation of molten iron using dynamic modelling Scheepers, E. Eksteen, Jacques Aldrich, Chris Pyrometallurgy Process optimization Process control Modelling Pneumatic injection of calcium carbide and, in some cases, fluxes via a submerged lance has become the accepted way to desulphurise crude molten iron, as tapped from a blast furnace or COREX furnace. A number of complex phenomena take place during the injection process which require an investigation of the kinetics, thermodynamics, transport processes and overall process dynamics of both the molten iron and the top-slag layer to predict the dynamic removal of sulphur from hot metal. A one dimensional model in terms of lance injection depth is presented, which is dynamically updated for the duration of the blow. The model takes into account the kinetics, thermodynamics and transport processes to predict the sulphur levels in the hot metal throughout a blow. A sensitivity analysis is performed to aid in the optimal selection of operating parameters. The model was implemented in MATLAB and calibrated with data from the Mittal Steel plant in Saldanha, South Africa. The modelling results are significant in that it allows the selection of operating conditions to minimize the processing time for desulphurisation, and the minimization of the heat loss (that has to be regained in the subsequent steelmaking operations). 2006 Journal Article http://hdl.handle.net/20.500.11937/16656 Elsevier restricted |
| spellingShingle | Pyrometallurgy Process optimization Process control Modelling Scheepers, E. Eksteen, Jacques Aldrich, Chris Optimisation of the lance injection desulphurisation of molten iron using dynamic modelling |
| title | Optimisation of the lance injection desulphurisation of molten iron using dynamic modelling |
| title_full | Optimisation of the lance injection desulphurisation of molten iron using dynamic modelling |
| title_fullStr | Optimisation of the lance injection desulphurisation of molten iron using dynamic modelling |
| title_full_unstemmed | Optimisation of the lance injection desulphurisation of molten iron using dynamic modelling |
| title_short | Optimisation of the lance injection desulphurisation of molten iron using dynamic modelling |
| title_sort | optimisation of the lance injection desulphurisation of molten iron using dynamic modelling |
| topic | Pyrometallurgy Process optimization Process control Modelling |
| url | http://hdl.handle.net/20.500.11937/16656 |