论文部分内容阅读
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。
Taking the CaO-SiO2-FetO-P2O5 quaternary slag system as the research object, the influence of P2O5 mass fraction on the phase composition and phosphorus-rich phase of the quaternary slag system was analyzed based on theoretical calculation and thermal test. The equilibria of CaO-SiO2-FetO-P2O5 quaternary slag system at the temperature range of 400 ~ 1800 ℃ was calculated by the equilib module of Factsage software, and the thermal state test results were analyzed by SEM + EDS and XRD. As the mass fraction of P2O5 increases, the mass fraction of Ca3 (PO4) 2 in the phosphorus-rich phase increases. In addition, P is in the form of nC2S-C3P solid solution in the phosphorus-rich phase, but when the mass fraction of P2O5 in the slag reaches 18%, P in the phosphorus-rich phase will exist independently in the form of Ca3 (PO4) 2. The results of the hot test further validate Factsage’s theoretical calculations.