Further experimental investigation of freeze-lining/bath interface at steady-state conditions

Fallah-Mehrjardi, Ata, Hayes, Peter and Jak, Evgueni (2014) Further experimental investigation of freeze-lining/bath interface at steady-state conditions. Metallurgical and Materials Transactions B, 45 6: 2040-2049. doi:10.1007/s11663-014-0149-1

Author Fallah-Mehrjardi, Ata
Hayes, Peter
Jak, Evgueni
Title Further experimental investigation of freeze-lining/bath interface at steady-state conditions
Journal name Metallurgical and Materials Transactions B   Check publisher's open access policy
ISSN 1073-5615
Publication date 2014-08-06
Year available 2014
Sub-type Article (original research)
DOI 10.1007/s11663-014-0149-1
Open Access Status Not Open Access
Volume 45
Issue 6
Start page 2040
End page 2049
Total pages 10
Place of publication New York, NY, United States
Publisher Springer New York
Language eng
Formatted abstract
In design of the freeze-lining deposits in high-temperature reaction systems, it has been widely assumed that the interface temperature between the deposit and bath at steady-state conditions, that is, when the deposit interface velocity is zero, is the liquidus of the bulk bath material. Current work provides conclusive evidence that the interface temperature can be lower than that of the bulk liquidus. The observations are consistent with a mechanism involving the nucleation and growth of solids on detached crystals in a subliquidus layer as this fluid material moves toward the stagnant deposit interface and the dissolution of these detached crystals as they are transported away from the interface by turbulent eddies. The temperature and position of the stable deposit/liquid interface are determined by the balance between the extent of crystallization on the detached crystals and mass transfer across the subliquidus layer from the bulk bath. A conceptual framework is developed to analyze the factors influencing the steady-state deposit/interface temperature and deposit thickness in chemical systems operating in a positive temperature gradient. The framework can be used to explain the experimental observations in a diverse range of chemical systems and conditions, including high-temperature melts and aqueous solutions, and to explain why the interface temperature under these conditions can be between Tliquidus and Tsolidus.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2015 Collection
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