MgO含量对CaO-SiO2-Al2O3-MgO熔渣中液态相影响的模拟

运用Factsage软件模拟了MgO含量对CaO-SiO₂-Al₂O₃-MgO熔渣中液相区的影响.结果表明，随着CaO-SiO₂-Al₂O₃-MgO渣中MgO含量增加，渣中低熔点液相区整体向低CaO高SiO₂区移动.相图中1500℃液相区比例由0%MgO（质量分数）时的25.05%上升至9%MgO（质量分数）时的52.69%，而后降至15%MgO时的46.70%.相图中1400℃液相区比例由3%MgO时的14.41%上升至11%MgO时的34.39%，而后降至15%MgO时的31.04%.相图中1300℃液相区比例由5%MgO时的5.57%上升至14%MgO时的11.02%，而后降至15%MgO时的10.50%.相图中1200℃液相区域比例在MgO为0~6%时为零，由7%MgO时的0.88%上升至11%MgO时的1.22%，在MgO为13%~15%时降为零.模拟结果可对以CaO-SiO₂-Al₂O₃-MgO为基本组元配置炼钢渣系的成分选择提供有效指导.

Simulation on influence of MgO content on liquid phase in CaO-SiO2-Al2O3-MgO slag

The influence of MgO content on liquid phase in CaO-SiO₂-Al₂O₃-MgO slag system was simulated by Factsage software.The results show that,with increase of MgO content in CaO-SiO₂-Al₂O₃-MgO slag,the low melting point liquid area moves forward ‘low CaO high SiO₂’ area. 1500℃ liquid area ratio of phase diagram rises from 25.05% of 0% MgO(mass fraction) to 52.69% of 9% MgO,and drops to 46.70% of 15% MgO. 1400℃ liquid area ratio of phase diagram rises from 14.41% of 3% MgO to 34.39%of 11% MgO,and drops to 31.04% of 15% MgO. 1300℃ liquid area ratio of phase diagram rises from 5.57% of 5% MgO to 11.02% of 14% MgO,and drops to 10.05% of 15% MgO. 1200℃ liquid area ratio of phase diagram is 0 when MgO content during 0 to 6%,and rises from 0.88% of 7% MgO to 1.22% of 11% MgO,then changes to 0 when MgO content during 13% to 15%.Simulation results provide an effective guidance for composition selection of steelmaking slag with the CaO-SiO₂-Al₂O₃-MgO components as the basic configuration.