An Improved Model for the Heat-Up Stage of the CAS-OB Process: Development and Validation

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An Improved Model for the Heat-Up Stage of the CAS-OB Process : Development and Validation. / Kärnä, Aki; Järvinen, Mika; Sulasalmi, Petri; Visuri, Ville Valtteri; Ollila, Seppo; Fabritius, Timo.

In: Steel Research International, Vol. 89, No. 10, 1800141, 01.10.2018.

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Kärnä, Aki ; Järvinen, Mika ; Sulasalmi, Petri ; Visuri, Ville Valtteri ; Ollila, Seppo ; Fabritius, Timo. / An Improved Model for the Heat-Up Stage of the CAS-OB Process : Development and Validation. In: Steel Research International. 2018 ; Vol. 89, No. 10.

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@article{327c21a626674a36834aa66a34caa663,
title = "An Improved Model for the Heat-Up Stage of the CAS-OB Process: Development and Validation",
abstract = "Details of chemical heating in the CAS-OB process are not known exactly, making a computational model valuable in process development and control. A phenomena-based numerical model of the CAS-OB heating stage is presented. Chemical equilibrium at reaction surfaces is assumed to be limited by mass transfer. Making use of a law of mass action based kinetic approach, reactions, and mass transfer rates are solved simultaneously. Computational fluid dynamics is used to derive heat and mass transfer coefficients, which are then used in our model, consisting of only a few computational nodes. The model includes steel melt, slag, and gas phases, bell, and ladle structures, and three reaction fronts. Radiation, conduction, and convection heat transfer are solved in the system. The model outputs temperatures and chemical composition of the system, and the results are validated with industrial data from two measurement campaigns.",
keywords = "CAS-OB, CFD, chemical heating, mathematical modeling, top lance",
author = "Aki K{\"a}rn{\"a} and Mika J{\"a}rvinen and Petri Sulasalmi and Visuri, {Ville Valtteri} and Seppo Ollila and Timo Fabritius",
year = "2018",
month = "10",
day = "1",
doi = "10.1002/srin.201800141",
language = "English",
volume = "89",
journal = "Steel Research International",
issn = "1611-3683",
number = "10",

}

RIS - Download

TY - JOUR

T1 - An Improved Model for the Heat-Up Stage of the CAS-OB Process

T2 - Development and Validation

AU - Kärnä, Aki

AU - Järvinen, Mika

AU - Sulasalmi, Petri

AU - Visuri, Ville Valtteri

AU - Ollila, Seppo

AU - Fabritius, Timo

PY - 2018/10/1

Y1 - 2018/10/1

N2 - Details of chemical heating in the CAS-OB process are not known exactly, making a computational model valuable in process development and control. A phenomena-based numerical model of the CAS-OB heating stage is presented. Chemical equilibrium at reaction surfaces is assumed to be limited by mass transfer. Making use of a law of mass action based kinetic approach, reactions, and mass transfer rates are solved simultaneously. Computational fluid dynamics is used to derive heat and mass transfer coefficients, which are then used in our model, consisting of only a few computational nodes. The model includes steel melt, slag, and gas phases, bell, and ladle structures, and three reaction fronts. Radiation, conduction, and convection heat transfer are solved in the system. The model outputs temperatures and chemical composition of the system, and the results are validated with industrial data from two measurement campaigns.

AB - Details of chemical heating in the CAS-OB process are not known exactly, making a computational model valuable in process development and control. A phenomena-based numerical model of the CAS-OB heating stage is presented. Chemical equilibrium at reaction surfaces is assumed to be limited by mass transfer. Making use of a law of mass action based kinetic approach, reactions, and mass transfer rates are solved simultaneously. Computational fluid dynamics is used to derive heat and mass transfer coefficients, which are then used in our model, consisting of only a few computational nodes. The model includes steel melt, slag, and gas phases, bell, and ladle structures, and three reaction fronts. Radiation, conduction, and convection heat transfer are solved in the system. The model outputs temperatures and chemical composition of the system, and the results are validated with industrial data from two measurement campaigns.

KW - CAS-OB

KW - CFD

KW - chemical heating

KW - mathematical modeling

KW - top lance

UR - http://www.scopus.com/inward/record.url?scp=85050546449&partnerID=8YFLogxK

U2 - 10.1002/srin.201800141

DO - 10.1002/srin.201800141

M3 - Article

VL - 89

JO - Steel Research International

JF - Steel Research International

SN - 1611-3683

IS - 10

M1 - 1800141

ER -

ID: 31417772