Title:
ADDITIVE FOR STEEL
Document Type and Number:
Japanese Patent JP3824605
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an additive for steel which is excellent in desulfurizing performance, in particular, which is a calcium alminate based, contains no fluorine component and has a desulfurizing ratio in the initial stage equal to or higher than that of the CaO-CaF2 based additive.
SOLUTION: The additive for steel contains 3CaO-Al2O3 and 12CaO-7Al2O3, wherein a crystal grain diameter of 3CaO-Al2O3 is ≤50 μm. Further, the additive is characterized in that the aditive contains 20-97 mass% 3CaO-Al2O3, 3-80 mass% 12CaO-7Al2O3, ≤10 mass% (including 0%) free CaO and ≤1 mass% Fe and the crystal grain diameter of 3CaO-Al2O3 is ≤50μm.
Inventors:
Hideaki Mizuwatari
Epoch
Kenji Yamamoto
Kushihashi Kazuto
Epoch
Kenji Yamamoto
Kushihashi Kazuto
Application Number:
JP2003401224A
Publication Date:
September 20, 2006
Filing Date:
December 01, 2003
Export Citation:
Assignee:
DENKI KAGAKU KOGYO KABUSHIKI KAISHA
International Classes:
C21C7/064; C21C1/02; C21C5/02; C21C5/36; (IPC1-7): C21C7/064; //C21C1/02; C21C5/02; C21C5/36
Domestic Patent References:
| JP2000336421A | ||||
| JP2003129122A | ||||
| JP63195208A | ||||
| JP5222425A | ||||
| JP2003328022A | ||||
| JP9003515A |
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