Some myths about DC arc furnaces

DC arc furnaces are widely used for steel scrap melting as well as for reductive smelting of ore fines. Industrial smelting applications include the smelting of chromite to produce ferrochromium, the smelting of ilmenite to produce titania slag and pig iron, and the recovery of cobalt from nonferrou...

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Bibliographic Details
Published in:Journal of the South African Institute of Mining and Metallurgy 2011-10, Vol.111 (10), p.665-673
Main Authors: Jones, R T, Reynolds, Q G, Curr, T R, Sager, D
Format: Article
Language:English
Subjects:
Arc furnaces
Direct current
Electric arc furnaces
Electrodes
Iron and steel making
Slags
Smelting
Titanium dioxide
Online Access:Get full text
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Summary:DC arc furnaces are widely used for steel scrap melting as well as for reductive smelting of ore fines. Industrial smelting applications include the smelting of chromite to produce ferrochromium, the smelting of ilmenite to produce titania slag and pig iron, and the recovery of cobalt from nonferrous smelter slags. A number of myths and misconceptions are widely held, especially regarding: the age of the technology, the use of a hollow electrode, arc stability and shape, arc and bath radiation, interaction between the arc and molten slag, electrical behaviour of arcs and slags, a comparison between AC and DC furnaces, DC reactors, the lifespan of bottom electrodes, and the applicability of DC arc furnaces to various metallurgical systems.
ISSN:0038-223X