Speakers
Description
In the basic oxygen furnace (BOF), CO is generated as a result of the decarburization
reactions that occur during the refining process. This CO formed can react with the oxygen
from the jet, leading to carbon dioxide (CO2 ) formation through post-combustion reaction
in the free jet region above the molten metal. The post-combustion reaction generates about
2.5 times the energy amount that the C combustion reaction produces. If effectively
transferred back to the melt, the CO2 formation in the BOF consequently enhances the heat
available for the process. In addition, a reliable prediction of post-combustion inside the
furnace can be useful for understanding the oxygen partitioning between decarburisation
and FeO formation. This understanding can be related to early blow slag formation which is
critical for the BOF process control.
Past studies and industrial data show that the CO2/CO + CO2 ratio (post-combustion ratio)
during the BOF refining period is transient in nature. The variation in PCR observed during
the early stage of the blow is not yet fully understood. Dynamic process variables, including
lance position, scrap characteristics, oxygen flow rate, and the height of slag foaming,
significantly influence the post-combustion ratio. However, the rapid changes of these
variables during the initial blowing stage make it challenging to establish a clear relationship
between the post-combustion ratio and these process parameters.
This study conducts a critical literature review to determine and explore the impact of these
key variables on the CO2/CO + CO2 ratio during converter operation. The findings from the
literature review are validated with plant data of a 330t converter operated at Tata Steel,
Netherlands. By analyzing the critical factors influencing the post-combustion, this study
provides insights into optimizing the BOF process.
| Speaker Country | Netherlands |
|---|---|
| Are you interested in publishing the paper in a Steel Research International special issue? | Yes |
