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Dynamic model of basic oxygen steelmaking process based on multi-zone reaction kinetics : model derivation and validation
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Kumar Rout, Bapin, Brooks, Geoff, Rhamdhani, M. Akbar, Li, Zushu, Schrama, Frank N. H. and Sun, Jianjun (2018) Dynamic model of basic oxygen steelmaking process based on multi-zone reaction kinetics : model derivation and validation. Metallurgical and Materials Transactions B, 49 . pp. 537-557. doi:10.1007/s11663-017-1166-7 ISSN 1073-5615.
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WRAP-dynamic-model-oxygen-steelmaking-multi-zone-kinetics-validation-Li-2018.pdf - Accepted Version - Requires a PDF viewer. Download (2533Kb) | Preview |
Official URL: https://doi.org/10.1007/s11663-017-1166-7
Abstract
A multi-zone kinetic model coupled with a dynamic slag generation model was developed for the simulation of hot metal and slag composition during the BOF operation. The three reaction zones, (i) jet impact zone (ii) slag-bulk metal zone (iii) slag-metal-gas emulsion zone were considered for the calculation of overall refining kinetics. In the rate equations, the transient rate parameters were mathematically described as a function of process variables. A micro and macroscopic rate calculation methodology (micro-kinetics and macro-kinetics) were developed to estimate the total refining contributed by the recirculating metal droplets through the slag-metal emulsion zone. The micro-kinetics involves developing the rate equation for individual droplets in the emulsion. The mathematical models for the size distribution of initial droplets, kinetics of simultaneous refining of elements, the residence time in the emulsion, dynamic interfacial area change were established in the micro-kinetic model. In the macro-kinetics calculation, a droplet generation model was employed and the total amount of refining by emulsion was calculated by summing the refining from the entire population of returning droplets. A dynamic FetO generation model based on oxygen mass balance was developed and coupled with the multi-zone kinetic model. The effect of post combustion on the evolution of slag and metal composition was investigated. The model was applied to a 200-ton top blowing converter and the simulated value of metal and slag was found to be in good agreement with the measured data. The post-combustion ratio was found to be an important factor in controlling FetO content in the slag and the kinetics of Mn and P in a BOF process.
Item Type: | Journal Article | ||||||||
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Subjects: | T Technology > TN Mining engineering. Metallurgy | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
Library of Congress Subject Headings (LCSH): | Steel -- Metallurgy -- Oxygen processes -- Mathematical models, Chemical kinetics | ||||||||
Journal or Publication Title: | Metallurgical and Materials Transactions B | ||||||||
Publisher: | Springer New York LLC | ||||||||
ISSN: | 1073-5615 | ||||||||
Official Date: | April 2018 | ||||||||
Dates: |
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Volume: | 49 | ||||||||
Page Range: | pp. 537-557 | ||||||||
DOI: | 10.1007/s11663-017-1166-7 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 8 January 2018 | ||||||||
Date of first compliant Open Access: | 8 January 2019 | ||||||||
RIOXX Funder/Project Grant: |
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