Based on multi-component regression analysis on samples of 800 heats(300 t ladle)

the model of predication for temperature of 60 t molten steel in tundish-T

tund

has been established:T

tund

=-66.7499+1.03196 T- 0.76824x₁-0.00750x

2

+0.23253t-0.60624i-9.39124×10

-6

t³

where T-temperature of molten steel in la-dle arriving at tumntable/℃;x₁-laying aside time of ladle before casting /min;xz- baking time of tundish /min; t- casting time of molten steel in ladle /min.The results of statistic analysis on prediction temperature of molten steel in tundish showed that the error temperature of molten steel in tundish between predicted value and measured value was less than ±5℃.