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Abstract

The aim of this research project was to investigate, in the framework of stainless steel production in the electric arc furnance and the AOD converter, the thermodynamics and kinetics of dust formation, of the effects of direct dust recycling and of the dust recovery in a separate smelting operation. The four possible mechanisms of dust formation during steelmaking are evaporation of metal, ejection of slag, ejection of metal and removal of solids. Dust samples were taken from the off gas during melting and refining of austenitic and ferritic heats at a furnace and a modified AOD converter. The evaluation of dust samples taken during the melting of scrap at the electric arc furace gave clear evidence that each of the four dust generation mechanisms contributed to the total dust formation. For the AOD converter, the contributions of the different dust generation mechanisms were quantitatively determined. The predominant mechanism ejection of metal and slag droplets by bubble bursting at the bath surface with a view to minimizing dust formation in stainless steelmaking, conclusions are drawn from the results obtained. Finally the possibliites and limitations for the reuse of Cr/Ni wastes are discussed.

Additional information

Authors: NEUSCHÜTZ D, RWTH Aachen (DE);HAUCK A, RWTH Aachen (DE);DELHAES C, RWTH Aachen (DE)
Bibliographic Reference: EUR 15597 DE (1996) 56pp., FS, ECU 8.50
Availability: Available from the (2)
ISBN: ISBN 92-827-6475-3
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