Mathematical modelling of post combustion in Dofasco`s KOBM
In the AISI Direct Steelmaking program, trials were undertaken in Dofasco`s 300 Tonne KOBM to examine post combustion. To support this work, a two-dimensional turbulent mathematical model has been developed to describe gas flow, combustion reactions and heat transfer (radiation and convection) in converter-type steelmaking processes. Gaseous flow patterns, temperature and heat flux distributions in the furnace were calculated with this model. Key findings are: The post combustion ratio is determined from the rates of oxygen supply, oxygen used for decarburization and the remainder available for post combustion, i.e. deducible from a mass balance calculation, comparison between the heat transfer fluxes calculated based on the model and those measured industrially indicates that the conventionally defined heat transfer efficiency over-estimates the heat recovered by the bath by about 20%, and the location of the combustion zone can be controlled, to a certain extent, by adjusting the lance practice.
- Research Organization:
- EG and G Idaho, Inc., Idaho Falls, ID (United States); McMaster Univ., Hamilton, ON (Canada). Dept. of Materials Science and Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FC07-89ID12847
- OSTI ID:
- 10120399
- Report Number(s):
- EGG-M-91392; CONF-9204165-1; ON: DE93005254
- Resource Relation:
- Conference: 1992 steelmaking conference,Toronto (Canada),5-8 Apr 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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Post combustion trials at Dofasco's KOBM furnace
Post combustion trials at Dofasco`s KOBM furnace