Effect of ladle lining

tundish coating and covering agent on carbon pickup of liquid of ultra-low carbon steel MA ( ≤ 0.005% C) during 180 t RH refining end to 45 t tundish casting process has been studied by statistic data. Results show that for first heat of continuous-continuous casting heats

the carbon pickup of liquid is higher i. e. 5 x 10

-6

~ 10 X 10

-6

for rest heats that is ≤ 3 X 10

-6

. With slow adding covering agent for first heat to control fluctuation of liquid level

adding Al

2

O

3

in lining to decrease etching of slag line of ladle

and reducing free carbon content in ladle lining

tundish coating and covering agent

the recarburization in liquid during RH refining end to rundish casting process shall be ≤ 3 × 10

-6

。*