FIELD: ferrous metallurgy, namely process of wide strip hot rolling.
SUBSTANCE: method comprises steps of heating reflection surface of shields by electric current from initial temperature till temperature of surface of shielded metal; heating screens at least during two successive stages at supplying electric current; at first stage heating shield till intermediate temperature consisting of 0.55 - 0.65 of final temperature and at second stage heating shields till final temperature equal to said metal temperature. Time duration of heating shield till intermediate temperature exceeds time duration for heating it till final temperature. Intermediate temperature is in range 600 - 700°C; final temperature is in range 1000 - 1150°C. Said temperature values are correlated. Invention provides possibility for effective rising of shield temperature at minimum consumption of energy.
EFFECT: lowered losses of heat caused by radiation.
2 cl, 3 dwg, 4 ex
