Industrial study of iron oxide reduction by injection of carbon particles into the electric arc furnace

Authors

  • A. N. Conejo Instituto Tecnológico de Morelia
  • R. Torres Ispat Mexicana S.A.
  • E. Cuellar AIMCOR de México

DOI:

https://doi.org/10.3989/revmetalm.1999.v35.i2.613

Keywords:

Iron oxide, Carbon injection, Slag foaming

Abstract


An industrial study was conducted in electric arc furnaces (EAF) employing 100% direct reduced iron to evaluate the oxidation level of the slag-metal system. Energy consumption is decreased by injecting gaseous oxygen, however, slag oxidation also increases. In order to reduce the extent of oxidation while keeping a high volume of the oxygen injected, it is required: a) to optimize the carbon injection practice, b) to increase the carbon concentration of sponge iron, c) to operate with soluble carbon in both the metal and the slag beyond a critical level and d) to employ a low temperature profile, on average 1,650°C. A method to define the proper amount of carbon in sponge iron which considers their metallization as well as the amount of oxygen injected is proposed. The position of the lance is critical in order to optimize the practice of carbon injection and assure a better residence time of the carbon particles within the furnace.

Downloads

Download data is not yet available.

Downloads

Published

1999-04-30

How to Cite

Conejo, A. N., Torres, R., & Cuellar, E. (1999). Industrial study of iron oxide reduction by injection of carbon particles into the electric arc furnace. Revista De Metalurgia, 35(2), 111–125. https://doi.org/10.3989/revmetalm.1999.v35.i2.613

Issue

Section

Articles