Development of a High Basicity Exothermic Starter Mold Powder for the Prevention of Strand Surface Cracks at Cast Start
(Room 205A)
08 May 17
3:00 PM
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3:30 PM
Tracks:
Mold Powder Development
Conditions during continuous casting start-up are much different than steady-state casting. There are many challenges during start cast, including lack of lubrication, freezing of molten steel surface, inclusion defects, carbon pickup and surface cracks. To address these issues, especially surface cracks on peritectic and medium-carbon steel grades, a new high-basicity exothermic starter mold powder has been developed. The new technology has achieved reduced first-slab steel surface cracks in the actual casting of peritectic and medium-carbon steel. This report will present the features of the high-basicity exothermic starter powder and the performance of the new powder during casting.