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Effect of Sulfur on the TTT Diagram of CaO–Al2O3 Slag at Eutectic Composition

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Title: Effect of Sulfur on the TTT Diagram of CaO–Al2O3 Slag at Eutectic Composition
Authors: Kashiwaya, Yoshiaki Browse this author
Kusada, Yasuaki Browse this author
Suzuki, Ryosuke O. Browse this author →KAKEN DB
Keywords: TTT diagram
desulfurization slag
hot thermocouple
Issue Date: 2011
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 51
Issue: 12
Start Page: 1974
End Page: 1981
Publisher DOI: 10.2355/isijinternational.51.1974
Abstract: It is important to know the behavior of inclusion in a CaO-Al2O3-(SiO2 and/or MgO) system for controlling the properties of steel. The crystallization of inclusion has a large effect on the rolling process. However, there is little study of the effect of sulfur on the crystallization of inclusion. In the previous paper, the authors were investigated the sulfur behavior in the CaO-Al2O3 slag at the eutectic composition (CAEU) under controlled atmosphere. In the present study, the effects of sulfur on the TTT diagrams were measured by the hot thermocouple method under controlled atmosphere. 1 mass%, 5 mass% and 10 mass% CaS were added to the eutectic composition of calcium aluminate (CAEU). The crystal region in TTT diagrams was expanded by the addition of CaS from 1 mass% to 10 mass% under Ar atmosphere. And the start of crystallization became faster with the increase of CaS addition. The crystal phases were monocalcium aluminate (CA) and tricalcium aluminate (C3A) regardless to the CaS content. However, primary crystal was changed from the content of CaS. When 1 mass%CaS was added to CAEU, the primary crystal was CA. On the other hand, the primary crystal was C3A in the cases of 5 mass% and 10 mass%CaS.
Rights: Copyright © 2011 by The Iron and Steel Institute of Japan
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 鈴木 亮輔

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