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Sulfur transfer in dynamic conditions of liquid steel drops failing through slag layer SCIE SCOPUS

Title
Sulfur transfer in dynamic conditions of liquid steel drops failing through slag layer
Authors
Kang, SMKim, DYKim, JSLee, HG
Date Issued
2003-01
Publisher
IRON STEEL INST JAPAN KEIDANREN KAIKA
Abstract
The rate of desulfurization was investigated by allowing liquid iron droplets to fall through a CaO-Al2O3-MgO slag layer at 1600degreesC. Droplet falling velocity decreased by increasing the sulfur content in the metal. The sulfur transfer was well represented by a first order reaction rate with respect to the sulfur concentration of the metal. The rate of desulfurization during dynamic contact while falling through the slag layer was about two orders of magnitude larger than that of the static contact between the metal and slag. The enhanced rate of desulfurization during the dynamic contact was attributed to the combined effect of (1) the continual contact of fresh slag while falling, (2) enhanced internal circulation in the metal phase, and (3) most importantly, emulsification of the metal/slag interface, which greatly increases the reaction area. The rate of desulfurization was affected to a large extent by slag composition. It was tentatively concluded that slag composition influences the rate of desulfurization by affecting both emulsification of the metal/slag interface and the interfacial reaction of sulfur transfer.
Keywords
steel; sulfur; desulfurization; drop; slag; interfacial phenomena; MOLTEN PIG-IRON; INTERFACIAL PHENOMENA; MASS-TRANSFER; DESULFURIZATION; KINETICS; METAL; MANGANESE; SYSTEMS
URI
https://oasis.postech.ac.kr/handle/2014.oak/29785
DOI
10.2355/isijinternational.43.1683
ISSN
0915-1559
Article Type
Article
Citation
ISIJ INTERNATIONAL, vol. 43, no. 11, page. 1683 - 1690, 2003-01
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