Dynamic refining control model for LD converter

Rao, B V Subba and Ballal, N B (1996) Dynamic refining control model for LD converter. In: Proceedings of the National Seminar on Computer Applications in Materials & Metallurgical Engineering, Dec. 10-11, 1996, NML, Jamshedpur.



A mathematical model for the dynamic refining control of the LD Converter is presented. Equations representing the reaction kinetics are formulated using the oxygen demand function. The amount of oxygen accumulated in LD Conver-ter, which is calculated from the oxygen balance by using exhaust gas data, corresponds to the amount of FeO, Fe203 and Mn0 in the slag during blowing. With the control of the refining reaction with oxygen balance carbon, phospho-rus and manganese contents of steel and the total iron content of slag at blow end were controlled at preferable levels and their fluctuations were remarkably reduced. The equations were coupled with appropriate thermal balance equations. The resulting set of non-linear first order equations have been numerically solved to predict the reaction path in the converter as a function of the operat-ing conditions like oxygen blowing rate, lance height, iron ore, limestone additions rates etc. With continuous on line data feeding from the converter facilities like sublance systems and waste gas analysers the entire conve-rter operation could be automated. The model works on a simple micro computer and could be easily incorporated on to the on-line control circuit of the Converter.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:http://eprints.nmlindia.org/5581
Uncontrolled Keywords:refining; LD converter; sublance systems; limestone
Divisions:Mathematical Modelling and Simulation
ID Code:5581
Deposited By:Sahu A K
Deposited On:20 Jun 2012 11:46
Last Modified:20 Jun 2012 11:46
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