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在1 300℃下,通过向CaO-SiO_2-Fe_tO-P_2O_5系熔渣中浸入固相CaO的方法,分析了CaO-SiO_2-Fe_tO-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_tO-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.
The reaction process between CaO-SiO_2-Fe_tO-P_2O_5 slag system and solid-phase CaO was analyzed by immersing solid-state CaO into CaO-SiO_2-Fe_tO-P_2O_5 slag at 1300 ℃. The molecular ion theory The activity of each component in the slag was calculated and the formation mechanism of 2CaO · SiO_2-3CaO · P_2O_5 solid solution was studied.The results show that the components in the CaO-SiO_2-Fe_tO-P_2O_5 slag system are mainly composed of 2CaO · SiO_2 and 3FeO · When CaO and slag are in contact with each other, 2CaO · SiO_2 in the slag first precipitates on the surface of solid-phase CaO and forms a solid layer of 2CaO · SiO_2. With the increase of CaO and 3FeO · P_2O_5 compounds into the reaction interface The continuous diffusion of 2CaO · SiO_2-3CaO · P_2O_5 and CaO-FeO solid solution.