Ladle Degasser/ Ladle Degasser with Oxygen Blowing

During treatment the ladle is sealed with a vacuum tight cover or, alternatively, placed into a vacuum tight tank sealed with a moveable cover. Effective homogenisation is guaranteed with modern inert gas stirring systems. The extensive exposure of liquid steel to the vacuum serves not only to lower the carbon, hydrogen, oxygen and nitrogen contents considerably, but also enhances any desulphurisation.

Advantages:

• Much reduced hydrogen levels after a short treatment time.
• Desulphurisation to below 20 ppm S.
• Vacuum decarburisation to less than 20 ppm C.
• Removal of nitrogen
• Effective flotation of non-metallic inclusions.
• Achievement of very narrow tolerance bands.
• Relatively low investment cost.
• High availability with relatively low maintenance costs.