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Modeling of Ladle Refining Process Considering Mixing and Chemical Reaction
Author(s) -
You Dali,
Michelic Susanne Katharina,
Bernhard Christian
Publication year - 2020
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.202000045
Subject(s) - ladle , refining (metallurgy) , mixing (physics) , slag (welding) , materials science , dissolution , metallurgy , multiphase flow , chemical reaction , process (computing) , alloy , thermodynamics , chemistry , engineering , chemical engineering , computer science , biochemistry , physics , quantum mechanics , operating system
A ladle furnace (LF) refining process model is proposed considering both steel mixing and multiphase chemical reactions. In the model, the LF, together with the melts, is divided into a finite number of tanks according to the tank‐in‐series model. The tank number is determined by simulations of the model with varied tanks and compared with the empirical mixing time. The “effective equilibrium reaction zone (EERZ)” method is used to describe the kinetics of multiphase reactions. The thermodynamic library—ChemApp—is applied to link the model to thermodynamic database. Steel/slag reaction, lining dissolution, alloy addition, and air absorption are considered. Using the model, an industrial LF treatment process is simulated and the reasonability of the predicted compositions of steel, slag, and inclusions is illustrated by comparing with measurements. The inhomogeneity of the steel and inclusion concentrations in different tanks are shown.