Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2013, Vol. 34 ›› Issue (10): 1434-1437.DOI: -

• Materials & Metallurgy • Previous Articles     Next Articles

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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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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