东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (10): 1434-1437.DOI: -

• 材料与冶金 • 上一篇    下一篇

2CaO·SiO2-3CaO·P2O5固溶体形成机理

苏畅1，于景坤1，王洪章2   

  1. (1.东北大学材料与冶金学院，辽宁沈阳110819；2.沈阳东大冶金科技股份有限公司，辽宁沈阳110819)
  • 收稿日期:2013-04-23 修回日期:2013-04-23 出版日期:2013-10-15 发布日期:2013-05-24
  • 通讯作者: 苏畅
  • 作者简介:苏畅(1981-)，女，辽宁鞍山人，东北大学博士研究生；于景坤(1960-)，男，辽宁康平人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51274059).

Formation Mechanism of 2CaO·SiO23CaO·P2O5 Solid Solution

SU Chang1， YU Jingkun1， WANG Hongzhang2   

  1. 1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China; 2. Northeastern University Metallurgical Technology Institute Company Limited， Shenyang 110819， China.
  • Received:2013-04-23 Revised:2013-04-23 Online:2013-10-15 Published:2013-05-24
  • Contact: YU Jingkun
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摘要： 在1300℃下，通过向CaO-SiO2-FetO-P2O5系熔渣中浸入固相CaO的方法，分析了CaO-SiO2-FetO-P2O5渣系与固相CaO间的反应过程，利用分子离子理论计算了炉渣中各组元的活度，研究了2CaO·SiO2-3CaO·P2O5固溶体的形成机理.研究结果表明，CaO-SiO2-FetO-P2O5渣系中组元主要是以2CaO·SiO2和3FeO·P2O5化合物的形态存在；当固相CaO和炉渣接触时，渣中的2CaO·SiO2首先在固相CaO表面析出并形成2CaO·SiO2固相层；随着CaO组元和3FeO·P2O5化合物向反应界面的不断扩散，生成了2CaO·SiO2-3CaO·P2O5和CaO-FeO固溶体.

关键词: 反应机理, 炉渣, 固相CaO, 脱磷, 活度

Abstract: The reaction process of CaOSiO2FetOP2O5 slag with solid CaO was investigated by immerging solid CaO into CaOSiO2FetOP2O5 molten slag under 1300℃.The activity of each compound in slag was calculated by the coexistence theory of molecule and ion， and the formation mechanism of 2CaO·SiO23CaO·P2O5 solid solution was discussed. The results showed that the components of CaOSiO2FetOP2O5 slag existed mainly in forms of 2CaO·SiO2 and 3FeO·P2O5 in molten slag. When the solid CaO contacted with the slag， 2CaO·SiO2 first precipitated on the surface of the solid CaO and formed 2CaO·SiO2 solid layers， then CaO and 3FeO·P2O5 continuously diffused into the interface between the CaO and 2CaO·SiO2 layer， thus the 2CaO·SiO23CaO·P2O5 and CaOFeO solid solutions were formed.

Key words: reaction mechanism, slag, solid CaO, dephosphorization, activity

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