Phosphorus Migration Behavior in the Process of Converter Slag Gasification Dephosphorization

To realize the gasification dephosphorization process in the converter slag splashing stage for avoiding the P enrichment, the dephosphorized slag can be left for recycling in subsequent furnaces. The migratory behavior of P during the slag gasification dephosphorization was studied. The results show that the P element in converter slag is mainly enriched in the silicate phase. The FeO in the converter slag is reduced by the coke into a large-diameter granular elemental Fe phase. The P2O5 in the slag is reduced to P-2 steam by coke at high temperature. Most of the P-2 steam passes through the gas-slag interface and enters the furnace gas. A small part of the P-2 steam will be adsorbed by the nearby elemental Fe phase to form iron phosphide.