材料期刊网

通过黏流活化能与温度的关系分析了wMgO、wCaO/wAl2O3和wSiO2对铝钙型预熔渣液相线温度的影响，并通过熔点实验和FactSage热力学计算软件对研究结果进行验证，对比分析熔化温度和黏温特性的区别和联系。结果表明：铝酸钙型预熔精炼渣中，wMgO、wCaO/wAl2O3和wSiO2对黏温特性估算的液相线温度的影响比较显著，总体趋势表现为先降低后升高，其中，wMgO为4%~6%，wCaO/wAl2O3为0.8~1.0，wSiO2为6%~10%时，能显著改善熔渣的熔化性能，变化规律与理论分析一致。通过熔渣黏温特性可以较为准确地估算液相线温度，估算的液相线温度介于FactSage计算的液相线温度与实验测定的半球点温度之间。

Liquidus temperature of Al2O3-CaO base pre-molten reifning slag was estimated from the activation energy for viscous lfow, effects of wMgO, wCaO/wAl2O3 and wSiO2 on the liquidus temperature of slag were investigated. The estimated results were veriifed by melting experiments and theoretically calculated using the FactSage Software. Differences and connections of melting temperature and viscosity-temperature characteristics were analyzed. The results indicate that all of wMgO, wCaO/wAl2O3 and wSiO2 had obvious inlfuence on the liquidus temperature of slag. The liquidus temperature decreased with increasing the MgO content, and following by an increase with further increasing wMgO, the trends that the liquidus temperature changed with wCaO/wAl2O3 and wSiO2 were the same as the trend that the liquidus temperature changed with wMgO. While wMgO is between 4%and 6%, wCaO/wAl2O3 is between 4%and 6%, and wSiO2 is between 6%and 10%, the characteristic temperatures of slag are suitable. The results also indicate that the variation of the characteristic temperatures for slag estimated from different method is agreed with the theoretical analysis. The ifnding conifrms that estimate the liquidus temperatures from activation energies for viscous flow is reliable. And the liquidus temperature estimated from the activation energy for viscous lfow was fall in between the value calculated using the thermodynamic software FactSage and the value veriifed by melting experiments.