CaO-SiO2-FetO-P2O5渣中磷的富集行为

通过考察不同温度下CaO-SiO2-FetO-P2O5熔渣中磷在2CaO·SiO2颗粒内部和表面以及熔渣本体中的浓度分布规律,对CaO-SiO2-FetO-P2O5熔渣中磷的富集行为进行了研究.结果表明:熔渣中存在的2CaO·SiO2固体颗粒为渣中磷富集提供了场所,磷向2CaO·SiO2颗粒富集并形成2CaO·SiO2...

Enrichment Behavior of Phosphorus in CaO-SiO_2-Fe_tO-P_2O_5 Slag

The distribution of phosphorous in bulk slag,inside and outside the 2CaO·SiO2 in the molten CaO-SiO2-FetO-P2O5 slag was investigated.The research results showed that the existing 2CaO·SiO2 solid particles are the condensation sites for the phosphorous enrichment.The enrichment process of phosphorus in the molten slag can be considered as the three substeps: ① the mass transfer of phosphorus from bulk slag to the surface of 2CaO·SiO2 particle;② the formation of 2CaO·SiO2-3CaO·P2O5 solid solution on the surface of 2CaO·SiO2 particle by solid solution reaction,and ③ the diffusion of phosphorus from the product layer of solid solution to the inner of 2CaO·SiO2 particle.Higher temperatures accelerate the phosphorous enrichment.Comparing to the larger 2CaO·SiO2 particles,the completion time of phosphorous enrichment is shorter for the smaller particles,but the larger ones are favorable to the separation of phosphorus-rich phases from bulk slag.