the basicity ( CaO/SiO2) of molten slag of BOF is 2. 8 ~ 4. 2
of which the heat capacity is 2. 5 kJ/ (kg
℃)
the temperature of slag as entering slag pot is about 1 540 ℃
and the molten slag has nice conductivity
therefore it is available to use molten slag's heat energy and calcium oxide. As 8 t molten slag of 120 t BOF is charged in 70 t electric arc furnace for arc furnace steelmaking
the average tap to tap time
electric consumption
lime adding amount and oxygen consumption decrease respectively from 52 min
400 kWh/t
3. 6 t and 28 m3/t to 47 min
355 kWh/t
1. 0 t and 25 m3/t
it is available to save the resource and decrease the slag discharged.