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The objective of the present work was to carry out fundamental studies on the optimization of filtration techniques for the removal of inclusions in steel melts in a 100 kW vacuum induction melting and casting unit.
Filtration tests were made on pure iron melts, Cr-Ni steels of type X 5 CrNiMo 18 10 2 and Ni alloys of type 20% Cr, 10% Mo, 0.2% Al using commercially available ceramic foam, multi-hole and loop filters. In all cases, Al(2)O(3) inclusions were produced by the addition of pure Al to oxidized metal. Deoxidation and temperature were controlled by immersed EMF sensors.
Samples from solified metal before and after the filtration device were taken for chemical oxygen analysis and determination of particle size distribution. The filtration efficiencies based on total oxygen content and volume of particles were calculated and discussed with regard to different filter types and alloys. Furthermore the volume flow capacity and the resistance of different filters to fluid flow of water and steel were investigated. .

Additional information

Authors: RAIBER K, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf (DE);JANKE D, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf (DE)
Bibliographic Reference: EUR 15628 DE (1996) 135pp., FS, ECU 16.50
Availability: Available from the (2)
ISBN: ISBN 92-827-6458-3
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