Investigation of freeze-linings in a nonferrous industrial slag

Fallah-Mehrjardi, Ata, Hayes, Peter C., Vervynckt, Stephanie and Jak, Evgueni (2014) Investigation of freeze-linings in a nonferrous industrial slag. Metallurgical and Materials Transactions B, 45 3: 850-863. doi:10.1007/s11663-014-0074-3


Author Fallah-Mehrjardi, Ata
Hayes, Peter C.
Vervynckt, Stephanie
Jak, Evgueni
Title Investigation of freeze-linings in a nonferrous industrial slag
Journal name Metallurgical and Materials Transactions B   Check publisher's open access policy
ISSN 1073-5615
1543-1916
Publication date 2014-06
Sub-type Article (original research)
DOI 10.1007/s11663-014-0074-3
Open Access Status
Volume 45
Issue 3
Start page 850
End page 863
Total pages 14
Place of publication New York, NY, United States
Publisher Springer New York
Collection year 2015
Language eng
Subject 3104 Condensed Matter Physics
2506 Metals and Alloys
2211 Mechanics of Materials
2505 Materials Chemistry
Formatted abstract
Slag freeze-lining reactor wall protection is a widely used technology in high temperature reaction systems. An air-cooled probe technique was used to investigate the formation of the freeze-linings in an industrial blast furnace slag. The compositions of the phases and the microstructures within the deposits have been characterized. It has been demonstrated that an industrial air-cooled probe can be used to take bath samples from actual smelter operations. In addition, a laboratory-scale experiment was undertaken to investigate the formation, stability, and bath/deposit interface temperature at steady-state conditions. Importantly, the current study has shown that stable steady-state freeze-linings can be obtained in metallurgical reactors operating below the slag liquidus temperature. In spite of the fact that solids are present in the bulk slag, the deposit thickness remains unaltered due to the dynamic conditions present at the deposit/bath interface. The results are consistent with findings obtained on a number of other different slag systems and the proposed dynamic mechanism of deposit stabilization. The findings demonstrate the basis for, and potential benefits that may follow from, operating the high temperature reactors at temperatures below the liquidus temperature, i.e., with solids present, without a catastrophic build-up of solids. This change in design concept could result in significant decreases in operating temperature, energy, and operating cost savings.
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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