Phosphorus microscopic enrichment regularity of earlier and final slag in double-slag steelmaking
LI Chen-xiao1,2，LI Hong1,2，MAO Wen-wen1,2，LU Hua1,2
（1. State Key Laboratory of Advanced Metallurgy， University of Science and Technology Beijing， Beijing 100083， China 2. School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China）
Abstract：The phosphorus enrichment in different microarea of the earlier and final slag during the double-slag operation in converter was studied. The results show that the enrichment level of P is the highest in the microarea whose Rm is between 2.0 to 2.5. And the P mass fraction is higher in slag microarea whose Ca mass fraction in the earlier and final slag is between 16%~20% and 33%~33%，respectively. The P enrichment in microarea is closely related to the Si mass fraction，and the P mass fraction is at higher point in the microarea whose Si mass fraction is 9%~12% in final slag and 13%~14% in earlier slag. The Fe mass fraction in the microarea has clear impact on the P enrichment，and the P mass fraction can get the maximum value when the Fe mass fraction is between 5%~9%. The higher P mass fraction appears in the microarea whose Mg mass fraction is low.
2016, Vol. 26 
