B2O3对高铝渣稳定性的影响

为了明确B₂O₃对高Al₂O₃渣稳定性的影响,基于现场高炉渣的实际成分,通过熔体物性测定仪、扫描电镜、红外光谱仪分析了B₂O₃对高Al₂O₃渣黏度和基础玻璃微观结构的影响。结果表明,随着B₂O₃含量的增加,炉渣黏度降低;当炉渣温度低于1 360 ℃时,炉渣随着B₂O₃的增加稳定性增强;炉渣温度为1 216 ℃、B₂O₃质量分数为2.0%时,炉渣的稳定性最好。随着B₂O₃含量的增加,炉渣不断玻璃化,当B₂O₃质量分数为2.0%时,炉渣微观结构完全是玻璃态结构,表现为假性酸性渣的性质;随着B₂O₃含量的增加,Si-O-Al]键断裂,AlO₆]八面体结构振动峰增加,炉渣的稳定性越来越好。

Effect of B2O3 on high aluminous slag stability

In order to clarify the impact mechanisms of B₂O₃ on the stability of high Al₂O₃ slag, based on the actual composition of blast furnace slag in the field, the effect of B₂O₃ on the viscosity and basic glass microstructure of high Al₂O₃ slag were investigated by the high-temperature melt properties tester, scanning electron microscope and infrared spectroscopy. The results showed that slag viscosity decreased with the increase of B₂O₃ content. And the stability of slag increased with the increase of B₂O₃ when the slag temperature was lower than 1 360 ℃. The slag stability was the best when the slag temperature was 1 216 ℃ and the mass fraction of B₂O₃ was 2.0%. The slag was constantly glassy with the increase of B₂O₃ content. The microstructure of slag was glassy and had the properties of pseudo-acidic slag when the mass fraction of B₂O₃ was 2.0%. With increasing B₂O₃ content, the Si-O-Al] bond fractured and the vibration peak of AlO₆] octahedral structure increased, the slag stability became better and better.