Influence of Crystallization Behavior in Slag Film on Mold Thermocouple Temperature Deviation

In continuous casting, large deviations in lower mold thermocouples, which are called “sheeting,” lower productivity due to breakout detection resulting in casting speed slowdown or cast abort. The excessively thick solidified layer in the slag film causes the phenomena via the crystallized slag to be torn away. Since there were differences in the occurrence rate between mold powders even though the viscosity and crystallization temperature were the same, crystal structure investigation was carried out with EPMA, XRD and thermodynamic calculation. The results suggested that the lack of lubrication by complex crystal formation may have induced tear of the solidified layer.

Authors:

Satoshi Yamasaki | Shinagawa Refractories Co. Ltd.
 

Junya Ito | Shinagawa Refractories Co. Ltd.
 

Masanori Okada | Shinagawa Advanced Materials Americas Inc.
 

Jim Gilmore | Shinagawa Advanced Materials Americas Inc.
 

Session Chairs:

Abhishek Bhansali | Nucor Steel-Berkeley
 

Norbert Strobl | ArcelorMittal Dofasco