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Based on physical and thermodynamic dependencies a model for the vacuum circulation process for decarburization of steel was developed. The model includes the following process parts:

- Steel circulation from the ladle through the vacuum vessel;
- Decarburization reaction together with the resulting oxygen removal under vacuum;
- Oxygen pickup of the steel in the ladle by reduction of metal oxides in the slag;
- Adjustment of the equilibrium conditions for decarburization dependend on the vessel pressure.

It was verified by comparison of simulation results with process data from a vacuum circulation plant. The most important data is the decarburization rate, which is calculated from waste gas values, and resulting from a carbon balance calculation the carbon content. The stepwise improvement of the models for the process parts mentioned above resulted in a good correspondence between simulation and measurement. By evaluation of a larger amount of heats representative values for the model parameters were estimated. The process model allows simulation of the vacuum circulation process with sufficient accuracy and investigation of how to optimize construction and operation of vacuum circulation plants. lants.

Additional information

Authors: KLEIMT B, Betriebsforschungsinstitut des VDEH, Düsseldorf (DE);KÖHLE S, Betriebsforschungsinstitut des VDEH, Düsseldorf (DE);KOHLE S, Betriebsforschungsinstitut des VDEH, Dusseldorf (DE)
Bibliographic Reference: EUR 16186 DE (1997) 185pp., FS, ECU 31.50
Availability: Available from the (2)
ISBN: ISBN 92-828-1004-6
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