Basic oxygen furnace
The decarburisation is conducted in the converter process. The most
common type of converter process if the basic oxygen furnace - also
known as the Linz-Donawitz (LD) converter. In this process, the
oxidising gas mixture is injected via supersonic top lance.
In 2017, I cooperated with Aalto University on
mathematical modelling of the basic oxygen furnace. Their model is
on solution of complex reaction equilibria with the help of
Partiotioning of Gibbs Energy (PGE) routine. The model employs the
Unified Interaction Parameter (UIP) formalism and Modified
Quaasichemical Model (MQM) for describing the non-ideality of metal and
slag species, respectively.
Currently, I am involved in a study, in
which new online-measurements are employed for controlling
dephosphorisation in BOF.
- A thermodynamic-kinetic simulation tool for
the BOF process. In its current development stage the model accounts
for the reactions between oxygen and carbon, manganese and silicon
dissolved in the metal bath. Owing to the Gibbs energy minimisation
routine, the model is capable of predicting the formation of solid
compounds during the treatment.
Saqlain, M. Owais, M. Järvinen, V.-V. Visuri,
and T. Fabritius,
”Dephosphorization in ironmaking and oxygen steelmaking”, Aalto
University, Espoo, Finland, 2018.
- A. Kruskopf
Visuri, "A Gibbs Energy Minimization Approach for
Modeling of Chemical Reactions in a Basic Oxygen Furnace", Metallurgical and Materials
Transactions B: Process Metallurgy and Materials Processing Science,
vol. 48, no. 6, pp. 3281–3300, 2017.
Visuri, ``Basic Oxygen Furnace", in M. Aula, A. Heikkilä,
M. Iljana, T. Sipola, and V.-V. Visuri
(eds.), "Steel industry - what they measure and how?", Department of Process and
Environmental Engineering Report 345, University of Oulu,
Oulu, Finland, pp. 67–79, 2014.
- P. Sulasalmi and V.-V. Visuri,
"Environmental aspects of BOF slag and dust", in M. Aula, J.
Haapakangas, A. Heikkilä, M. Iljana, A. Kemppainen, J. Roininen, P.
Sulasalmi, and V.-V.
Visuri (eds.), "Some environmental aspects of BF, EAF and
BOF", Department of
Process and Environmental Engineering Report 343,
University of Oulu, Oulu, Finland, pp. 61–76, 2012.
- M. Prokkola, "Development of steel alloying calculation
model", Master's thesis, University of Oulu, 2016.
- S. Niemetmaa, "Improving yield and steel cleanliness by
the tapping stage", Master's thesis, University of Oulu, 2015.