Choice of technological regimes of a blast furnace operation with injection of hot reducing gases

Authors

  • A. I. Babich RWTH Aachen, Institute fur Eisenhüttenkunde
  • H. W. Gudenau RWTH Aachen, Institute fur Eisenhüttenkunde
  • K. T. Mavrommatis RWTH Aachen, Institute fur Eisenhüttenkunde
  • C. Froehling RWTH Aachen, Institute fur Eisenhüttenkunde
  • A. Formoso Centro Nacional de Investigaciones Metalúrgicas. Madrid
  • A. Cores Centro Nacional de Investigaciones Metalúrgicas. Madrid
  • L. García Centro de Investigaciones Metalúrgicas. Ciudad de la Habana

DOI:

https://doi.org/10.3989/revmetalm.2002.v38.i4.411

Keywords:

Ironmaking and steelmaking, Blast furnace, Raceway, Pulverized coal inyection, Inyection of hot reducing gases,

Abstract


Injection rate of fossil fuels is limited because of drop in the flame temperature in the raceway and problems in the deadman region and the cohesive zone. The next step for obtaining a considerable coke saving, a better operation in the deadman as an well as increase in blast furnace productivity and minimizing the environmental impact due to a decrease in carbon dioxide emmision would be injection by tuyeres of hot reducing gases (HRG) which are produced by low grade coal gasification or top gas regenerating. Use of HRG in combination with high pulverized coal inyection PCI rate and oxigen enrichment in the blast could allow to keep and to increase the competitiveness of the blast furnace process. Calculations using a mathematical model show that the HRG injection in combination with pulverized coal (PC) and enriching blast with oxigen can provide an increase in PC rate up to 300-400 kg/tHM and a rise in the furnace productivity by 40-50 %. Blast furnace operation with full oxigen blast (100 % of process oxigen with the exception for the hot blast) is possible when HRG is injected.

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Published

2002-08-30

How to Cite

Babich, A. I., Gudenau, H. W., Mavrommatis, K. T., Froehling, C., Formoso, A., Cores, A., & García, L. (2002). Choice of technological regimes of a blast furnace operation with injection of hot reducing gases. Revista De Metalurgia, 38(4), 288–305. https://doi.org/10.3989/revmetalm.2002.v38.i4.411

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