Development of injection of reduction gas into the blast ... - klimazwei

metallic iron. Its presence above the cohesive zone is a definite indication for high
reduction work in accordance with the injected hot reducing gas.
Figure 9: HGG tuyere opened for core drilling
5. Conclusion
The injection of hot gas into the BF shaft was successfully executed in operational
trials at BF 1 at Arcelor Eisenhüttenstadt. The penetration depth of the hot reducing
gas into the BF shaft has been evaluated theoretical by CFD calculation and
experimental by He-tracing investigations. The progress of burden material
reduction was determined by core drilling exercises and analysis of the core m
aterial.
The investigations show, that the shaft gas injection seems to be a key technology
to raise the use of additional reductants for the blast furnace process and to
become more flexible in reductant application.
6. Acknowledgement
This work has been financially supported by the BMBF (Bundesministerium für
Bildung und Forschung) under FKZ 01 LK 0401, 01 LK 0402, 01 LK 0403. The
authors wish to thank the BMBF for the financial assistance.
The authors are responsible for the contents of this paper.
7. References
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ökologischer Betrachtungsweise. Stahl und Eisen 124 (2004) Nr.5, s.27-34
[2] Steiler, J. M. and Hanrot, F.: Present state and innovative issues for
ironmaking. Science and technology of innovative ironmaking for aiming at
energy half consumption. Tokio, 27./28.11.2003
[3] Birat, J. P., Hanrot, F. and Danloy, G.: CO2 mitigation technologies in the
steel industry: a benchmark study based on process calculations. Scanmet
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[4] Danloy, G., Korthas, B. Hanrot. F. and van der Stel, J.: Challenges of new
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