A new 120 t top and bottom combined blown converter with TBM bottom blowing dephosphorization technology and new 6 bore great flow rate oxygen lance is built at steelmaking plant.As compared with original 80 t converter
the speed of reaction between liquid steel and slag increases
the reaction is easily tending towards balance
the average dephosphorization rate increases by 48.9%
the average time of blowing oxygen decreases by 3.5 min
the average tap to tap time reduces by 5 min
the percentage of converter end(FeO) decreases by 2.93% and the average consumption of iron-scrap charging decreases by 1 kg/t.