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Mechanism Study on the Formation of Liquid Calcium Aluminate Inclusion from MgO‐Al 2 O 3 Spinel
Author(s) -
Kang YoungJo,
Li Fan,
Morita Kazuki,
Sichen Du
Publication year - 2006
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200606463
Subject(s) - spinel , aluminate , calcium , materials science , phase (matter) , inclusion (mineral) , mineralogy , chemical engineering , metallurgy , chemistry , cement , organic chemistry , engineering
A study on the formation mechanism of liquid calcium aluminate inclusions from MgO‐Al 2 O 3 spinel was carried out. It was found that spinel reacted with dissolved Ca in liquid steel forming liquid calcium aluminate phase. Stability calculations showed good agreement with the experimental result. According to the thermodynamic calculation, liquid calcium aluminate inclusions would form from spinel even at very low level of dissolved Ca content at 1873 K. At lower temperatures, the compound CaO‐2Al 2 O 3 was found to be the stable phase at the spinelmetal interface. Potential sources of dissolved Ca during ladle processes were also discussed.