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Depletion of carbon from Al2O3-C mixtures into liquid iron: Rate controlling mechanisms
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Materialens processvetenskap.
2007 (Engelska)Ingår i: Canadian metallurgical quarterly, ISSN 0008-4433, E-ISSN 1879-1395, Vol. 46, nr 1, s. 25-32Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

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.

Ort, förlag, år, upplaga, sidor
2007. Vol. 46, nr 1, s. 25-32
Nyckelord [en]
monte-carlo-simulation, c-s melts, graphite, dissolution, sulfur
Identifikatorer
URN: urn:nbn:se:kth:diva-16413ISI: 000244511400004Scopus ID: 2-s2.0-33847194633OAI: oai:DiVA.org:kth-16413DiVA, id: diva2:334455
Anmärkning
QC 20100525Tillgänglig från: 2010-08-05 Skapad: 2010-08-05 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

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Seetharaman, Seshadri
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