| 1. |
- Alexis, Jonas, et al.
(författare)
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A model of an induction-stirred ladle accounting for slag and surface deformation
- 1999
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Ingår i: ISIJ International. - 0915-1559 .- 1347-5460. ; 39:8, s. 772-778
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Tidskriftsartikel (refereegranskat)abstract
- A 3 dimensional 2-phase model of an induction stirred ladle has been developed. The model is based on fundamental transport equations and includes the solution of steel- and slag-phase. Predicted velocities are in very good agreement with experimental data. Predicted velocities and turbulent kinetic energy dissipation from the model are shown to have linear relationships with input stirring force for different cylindrical ladles. Linear equations forthese relations are presented. Further calculations have shown that these linear equations also are able to predict velocities for a conical ladle. © 1999 ISIJ.
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| 2. |
- Grip, Carl-Erik, et al.
(författare)
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Prediction of emptying flows in ladles and verification with data from trace element plant trials
- 1997
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Ingår i: ISIJ International. - : Iron and Steel Institute of Japan. - 0915-1559 .- 1347-5460. ; 37:11, s. 1081-1090
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Tidskriftsartikel (refereegranskat)abstract
- A three-dimensional mathematical model of a casting ladle based on fundamental transport equations has been developed. The model may be used for predictions of both a standing ladle and a ladle from which steel is teemed into a tundish. An additional feature of the model is that it can predict concentration profiles of tracer elements which are added to the steel. The predicted concentration profiles during teeming are compared to experimental data from plant trials performed at SSAB and the agreement is found to be good. The model is used as a tool in the development of process control models.
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| 3. |
- Jonsson, Lage, et al.
(författare)
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A New Approach to Model Sulphur Refining in a Gas-stirred Ladle - A Coupled CFD and Thermodynamic Model
- 1998
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Ingår i: ISIJ International. - 0915-1559 .- 1347-5460. ; 38:3, s. 260-267
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Tidskriftsartikel (refereegranskat)abstract
- In the present work, a new modelling approach has been put forward to study slag-metal reactions. Sulphur refining in a gas-stirred ladle has been taken as an example. A two-dimensional fluid dynamic model accounting for the steel, slag and argon phases has been incorporated with the thermodynamics of desulphurisation. Comparison of the results of the model calculation with plant data from Ovako Steel indicates that the present approach has great potential. It has opened up the possibility of developing process models based on fundamental equations.
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| 4. |
- Jönsson, P.G., et al.
(författare)
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Viscosities of LF slags and their impact on ladle refining
- 1997
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Ingår i: ISIJ International. - 0915-1559 .- 1347-5460. ; 37:5, s. 484-491
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Tidskriftsartikel (refereegranskat)abstract
- This study focuses on the viscosities of synthetic slags used in secondary refining operations. Typically, these slags contain mainly CaO, AI2O3, MgO and Si02. The data for LF slag viscosities are used in a model for a gas-stirred ladle to evaluate the effect of viscosity variations on predicted parameters close to the slag/steel interface. The results show that viscosities of LF slags significantly affect ladle refining operations. It is therefore necessary to control the composition of the synthetic slags carefully during production.
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