Study on Dephosphorization Technology In Converter with High Scrap Ratio

In order to solve the problem of too high phosphorus content in end liquid steel of converter with high scrap ratio,the effects of the conditions of hot metal charging and end point on dephosphorization were studied by combing with the theory of dephosphorization thermodynamics.The results show that the optimum conditions for dephosphorization in hot metal charging and end point are as follows:when hot metal temperature and hot metal Si content should be controlled 1 300~1 360 ℃ and 0.55%~0. 65% respectively in hot metal charging;basicity,Fe O and Mn O were reached ≥2.6、16%~22% and 2.5%~4.0% respectively in converter end point,phosphorus content of liquid steel at the end point can be successfully achieved less than 0.015 0%.