Depletion of carbon from Al2O3-C mixtures into liquid iron: Rate controlling mechanisms
2007 (English)In: Canadian metallurgical quarterly, ISSN 0008-4433, E-ISSN 1879-1395, Vol. 46, no 1, 25-32 p.Article in journal (Refereed) Published
A sessile drop investigation on the kinetics of carbon dissolution from an alumina-carbon composite (75% C, 25% alumina) and a commercial refractory (28.3% C, 66.67% alumina, 5% binder) into liquid iron at 1600 degrees C is reported. Carbon dissolution from refractory substrates was very slow reaching 0.84% C and 0.1% C, respectively after 60 minutes. Both substrates also showed poor wettability. Experimental studies were supplemented with atomistic Monte Carlo simulations to investigate the influence of composition, temperature and melt turbulence. High carbon systems (100% C and 75% C, balance alumina) were affected by both temperature and melt turbulence to some extent; increased levels of melt turbulence/higher temperatures had no influence on low carbon (30% C) system. While mass transfer was the dominant rate controlling mechanism for high carbon systems, poor wettability of alumina with liquid iron and its significant influence on inhibiting the penetration of liquid iron in the refractory matrix was found to be the dominant rate controlling factor for low carbon refractories.
Place, publisher, year, edition, pages
2007. Vol. 46, no 1, 25-32 p.
monte-carlo-simulation, c-s melts, graphite, dissolution, sulfur
IdentifiersURN: urn:nbn:se:kth:diva-16413ISI: 000244511400004ScopusID: 2-s2.0-33847194633OAI: oai:DiVA.org:kth-16413DiVA: diva2:334455
QC 201005252010-08-052010-08-05Bibliographically approved