A Complex Approach for Secondary Cooling Improvements Using Sophisticated Spray Nozzle Analyses in Various ArcelorMittal USA Casters
(Room 205A)
09 May 17
10:00 AM
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10:30 AM
Tracks:
Caster Process Optimization
Procedures such as off-line nozzle testing using an impact pressure measurement for spray footprint analysis, heat transfer coefficient (HTC) measurement with realistic casting conditions, off-line and on-line slab surface temperature calculation with implementation of directly measured HTCs are the most important steps in analyzing the effect of nozzles used for secondary cooling in ArcelorMittal USA. This type of analysis, achieved by close cooperation within R&D, Operations, Quality and Operation Technology departments, produces slabs with improved surface quality. This type of analysis can also determine which sprays are performing poorly and lead to significant improvements in slab quality. Examples of this complex approach for Indiana Harbor and Burns Harbor casters will be discussed to show improvements in secondary cooling efficiency and slab quality.