Based on the penetration theory

a kinetic model for oxygen transfer between molten slag and liquid steel (luring protective gas electroslag remelting process is established

and remelting test of die steel S136 (/% : 0.39C

0.26Si

0.43Mn

0.020P

0.018S

13.37Cr

0.21Mo

0.34V) by a 50 kg electroslag remelting unit is carried out to get the effect of FeO content in slag - 0 ~ 2.0% (FeO)

original oxygen content in liquid steel at the electrode tip- 0 ~ 0.010 0% [ 0

]

radius of electrode -40 ~300 mm and remelting rate- (0.5 - 5.0) x 10

-6

m

3

/s on transfer rate of oxygen between molten slag and liquid steel. The results show that there is a critical value of (FeO)

as FeO content in slag is lower than the value

the oxygen transfer process is from liquid steel at electrode tip to

molten slag

whereas as FeO content is higher than that value

the oxygen transfer process is from molten slag to liquid steel at electrode tip； with increasing the radius of electrode

the liquid steel-molten slag oxygen transfer rate decreases

and with increasing the melting rate and the initial oxygen content in liquid steel

the liquid steel-molten slag oxygen transfer rate increases.