Decarburization of stainless steel: Part II. A mathematical model and a process optimization for industrial scale systems |
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| Authors: | Julian Szekely Shigeo Asai |
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| Affiliation: | (1) Center for Process Metallurgy, State University of New York at Buffalo, 14214 Buffalo, New York;(2) Center for Process Metallurgy, State University of New York at Buffalo, 14214 Buffalo, New York |
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| Abstract: | A mathematical model is presented for describing the bath temperature and composition trajectories for the decarburization
of stainless steel for processes operating on an indus-trial scale. The model is based on a set of component balances, written
with the aid of driving force expressions, the appropriate equilibrium relationships and the heat balance. The resultant set
of ordinary differential equations were solved numerically. The predic-tions based on the model were compared with experimentally
measured bath composition and temperature paths obtained for the operation of a 40 ton electric furnace. The predic-tions
and measurements showed very good agreement. The mathematical model was then combined with a trajectory optimization technique
to compute the optimal blowing programi .e., oxygen-argon content of the gas supplied) such that the total cost of the operation is minimized. This calculation was repeated
for a series of cost factors.
On leave from Department of Iron and Steel Engineering, Nagoya University, Nagoya, Japan |
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