摘要 The reduction and recovery of P2O5 in dephosphorization slag were examined to establish a new recycling process for dephosphorization slag. The dephosphorization slag is obtained from the dephosphorization furnace in the duplex converter process, and the content of P2O5 in the dephosphorization slag can reach 9 wt.%. The dephosphorization slag is considered to be a prospective resource of phosphorus due to its high content of P2O5. To explore the effects of temperature and Fe2O3 content in slag on phosphorus recovery from dephosphorization slag, the experimental slag was reduced by carbon powder in a resistance furnace. The results show that the temperature and content of Fe2O3 in slag have a significant effect on the reduction in P2O5, and the reduction and recovery ratios of P2O5 in slags increase with the increase in the experimental temperature and content of Fe2O3, reaching 94.41% and 83.09%, respectively. It has been indicated that phosphorus recovery from dephosphorization slag using carbothermic reduction has significant environmental and economic benefits.
Abstract：The reduction and recovery of P2O5 in dephosphorization slag were examined to establish a new recycling process for dephosphorization slag. The dephosphorization slag is obtained from the dephosphorization furnace in the duplex converter process, and the content of P2O5 in the dephosphorization slag can reach 9 wt.%. The dephosphorization slag is considered to be a prospective resource of phosphorus due to its high content of P2O5. To explore the effects of temperature and Fe2O3 content in slag on phosphorus recovery from dephosphorization slag, the experimental slag was reduced by carbon powder in a resistance furnace. The results show that the temperature and content of Fe2O3 in slag have a significant effect on the reduction in P2O5, and the reduction and recovery ratios of P2O5 in slags increase with the increase in the experimental temperature and content of Fe2O3, reaching 94.41% and 83.09%, respectively. It has been indicated that phosphorus recovery from dephosphorization slag using carbothermic reduction has significant environmental and economic benefits.
Sai He,Lu Lin,Ya-qin Liu, et al. Influence of temperature and Fe2O3 on phosphorus recovery from dephosphorization slag by reduction[J]. Journal of Iron and Steel Research International, 2023, 30(4): 697-707.
2023, Vol. 30 
