Abstract: In order to study recycle utilization effect of slag after gasification dephosphorization，The comparison experiment of gasification dephosphorization with coke powder was carried out in Tangsteel 60 t converter. The results showed that adding coke powder for gasification dephosphorization was feasible during the slag splashing stage. According to the multi-furnace phosphorus balance algorithm，the average dephosphorization rate of the test furnace was 25.06%. Compared to conventional smelting furnace，the slag mount of gasification dephosphorization furnace had decreased for 8.66kg per ton steel，which meant a reduction of 7.45%. The phosphorus content of end molten steel of test furnace was fluctuated at around 0.02%，which meant that the recycle of the gasification dephosphorization slag would not affect the dephosphorization effect of subsequent furnace.

Key words: converter steelmaking, slagging, gasification dephosphorization, recycle utilization, slag splashing