摘要
以CaO-SiO2-FetO-P2O5四元渣系为研究对象,结合理论计算和热态试验综合分析P2O5质量分数变化对该四元渣系物相组成以及富磷相的影响。应用Factsage软件equilib模块计算CaO-SiO2-FetO-P2O5四元渣系在400～1 800℃温度区间的多相平衡,再结合SEM+EDS与XRD对热态试验结果进行分析知,随着渣中P2O5质量分数的增加,富磷相中Ca3(PO4)2的质量分数随之增加。此外,P是以nC2S-C3P固溶体的形式存在于富磷相中,但当渣中P2O5质量分数达到18%时,富磷相中的P将以Ca3(PO4)2的形式独立存在。热态试验的分析结果进一步验证了Factsage的理论计算结果。
CaO-SiO2-FetO-P2O5 slag was set as the study object in this paper,and the effect of P2O5 content on mineralogical morphology and phosphorus occurrence form were studied by combing theoretical calculation and the experiment.The polyphase equilibrium of CaO-SiO2-FetO-P2O5 slag was calculated at 400~1 800 ℃ By using equilib section in Factsage software.The experimental results by the method of SEM＋EDS and XRD showed that the content of Ca3（PO4）2 in the rich phosphorus phase increases as the content of P2O5 in the slag increases.The general existence form of P in the rich phosphorus phase of steel slag is nC2S-C3P.But when the P2O5 content in the slag is more than 18%,phosphorous in the rich phosphorus phase will exist as Ca3（PO4）2 without combing with 2CaO·SiO2.The analyzing results of the experiment verified the theoretical calculation results of Factsage further.
出处
《中国冶金》
CAS
2013年第1期45-49,53,共6页
China Metallurgy
