A finite element thermal-conducting model of 80 t ladle has been established and stable state temperature  field of the ladle with different conditions was calculated by means of software ANSYS to get distribution cloud pattern of temperature  as  each  layer  of ladle being up to heat  saturation  and  outside  surface temperature  distribution  curves  of ladle wall. As well as the effect of materials and thickness of ladle wall

bottom and shielding agent on heat loss was analyzed.  Results showed that the heat loss of ladle was mainly through wall of ladle and the thermal conductivity of adiabatic layer  should  less  than  0.10  W/(m · ℃)

and  as  shielding  agent  thickness  was  about  40  mm

the  thermal  conductivity  should  be controlled    below    0.05W/(m · ℃).