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Optimizing Continuous Casting Processes to Minimize Central Segregation
Enhancing Molten Steel Purity
According to copper mold tube manufacturers, improving molten steel purity is crucial for preventing central segregation in continuous casting. Key measures include:
Increasing carbon hit rate accuracy in converter production to precisely control carbon content
Reducing S and P concentrations (highly segregative elements) through clean steel smelting techniques like hot metal pretreatment or ladle desulfurization
These steps significantly decrease central segregation and porosity risks by minimizing impurity element distribution
Slab Bulge Control Strategies
Continuous caster design should incorporate:
Compact roll arrangements with smaller diameters to minimize roll spacing
Rigid multi-section rollers to prevent backup roller deformation
Optimized caster height to reduce liquid cavity height and molten steel static pressure
Strict alignment of secondary cooling zone pinch rollers during operation
Temperature and Speed Regulation
Recommended control parameters:
Low carbon steel (C ≤ 0.08%):
Ladle superheat ≤ 600°C
Tundish superheat ≤ 300°C
Peritectic/medium carbon steel (0.08% ≤ C ≤ 0.30%):
Ladle superheat ≤ 550°C
Tundish superheat ≤ 250°C
Additional Quality Considerations
Surface slag inclusion requires prompt removal to:
Prevent final product surface defects
Avoid shell thinning at inclusion sites (due to slag's poor thermal conductivity)
Reduce breakout accident risks
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