东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (6): 814-817.DOI: -

• 论著 • 上一篇    下一篇

CaO-SiO_2-Fe_tO-P_2O_5渣中磷的富集行为

王楠;梁志刚;陈敏;邹宗树;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金/钢铁联合研究基金资助项目(50874130);国家自然科学基金资助项目(50974034)

Enrichment behavior of phosphorus in CaO-SiO2-FetO-P2O5 slag

Wang, Nan (1); Liang, Zhi-Gang (1); Chen, Min (1); Zou, Zong-Shu (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Wang, N.
  • About author:-
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摘要： 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·SiO2-3CaO·P2O5固溶体(富磷相).磷从熔渣本体向2CaO·SiO2颗粒的富集过程可认为是由磷自熔渣本体向2CaO·SiO2颗粒表面的传质、在2CaO·SiO2颗粒表面形成2CaO·SiO2-3CaO·P2O5固溶体以及磷通过固溶体产物层由颗粒表面向其内部扩散的3个子过程组成....

关键词: 磷富集, 2CaO·SiO2颗粒, 2CaO·SiO2-3CaO·P2O5固溶体, 富磷相, 传质

Abstract: 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.

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