Thermodynamics of Refining in Electric Furnace Steelmaking

Lahiri, A K (1994) Thermodynamics of Refining in Electric Furnace Steelmaking. In: Proceedings of the Workshop on Alternative Charge Materials for Electric Arc & Induction furnaces, 1994, NML-Jamshedpur.



In general, the input impurity levels in the electric and induction furnace charge is low, so refining does not pose any special problems. But the use of poor quality or unsorted scrap or high phosphorus sponge in the charge can lead to significant increase in the input impurity level. Besides, quite often the desired final impurity level is very low. Composition control in these cases pose a problem particularly because a large refining time leads to a higher power consumption and low productivity. To overcome this difficulty, ladle refining as secondary steelmaking practices are widely used along with the electric steel making. In this lecture refining principles both in electric furnace and ladle furnace will be discussed.Even at steelmaking temperatures, the reactions do not attain equilibrium unless the slag and metal phases are well stirred for a reasonable length of time. In this sense, equilibrium thermodynamics cannot give quantitative idea about the extent of actual refining that can be attained in electric and induction furnace.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:
Uncontrolled Keywords:High Phosphorus Sponge
Divisions:Metal Extraction and Forming
ID Code:2826
Deposited By:Sahu A K
Deposited On:09 May 2011 08:15
Last Modified:01 Oct 2012 16:52
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