How to decrease the sedimentation of deoxidation products in tundish nozzle
If in every 1500 nonmetallic inclusion, there is one remaining in tundish nozzle, the nozzle will highly probably be jammed. In order to decrease the sedimentation of deoxidation products, argon blowing is normally adopted, with the following reasons:
1.To form an argon film on the nozzle wall which could prevent deoxidation products from contacting the nozzle wall.
2.Argon bubles could blow the deoxidation products away from nozzle wall.
3.Argon bubles could make deoxidation products floating up.
4.Argon blowing could increase turbulence which could wash away some deoxidation products.
5.Presseure inside the nozzle will be increased to decrease the air inhalation.
6.Argon could prevent the molten steel from reacting with refractory material.