Teeming of molten steel from tundish to continuous casting mould needs extra precaution in terms of protection of steel against atmosphere. Since oxygen pick up occurs just before the solidification, resulting inclusions do not get sufficient time for separation owing to faster solidification in mold Teeming stream by inert gas or through the use of nozzles submerged in molten stream are the effective means to avoid inclusion formation.

iii)  Selection of tundish flux

Tundish flux should be selected such that it can easily absorb inclusions floating in the tundish .At the same time flux should also cover molten steel to prevent oxidation.

iv)  Tundish operation

Now a days sequence casting is commonly adopted in continuous casting. During ladle change- over period tundish feeds the molten steel to different molds of the continuous casting machine. In this situation care must be exercised to ovoid slag entrainment into mold due to vortex formation. Tundish should not be emptied completely. Also tundish lining material should be inert with aluminium.

v)  Inclusion can also form in the mold during solidification. As the steel solidifies the      excess solute elements like oxygen, sulphur, manganese etc are rejected and lead to      inclusions formation. 

Segregation during solidification must be avoided. Here stirring of molten steel is effective to minimize the segregation and inclusion formation