铝钙型预熔精炼渣的黏温特性和熔化温度  

Melting temperature and viscosity-temperature characteristics of Al_2O_3-CaO base pre-molten refining slag

作　　者：许继芳[1] 张捷宇[2] 苏丽娟[1] 盛敏奇[1] 翁文凭[1] 

机构地区：[1]苏州大学沙钢钢铁学院,江苏苏州215021 [2]上海大学上海市现代冶金与材料制备重点实验室,上海200072

出　　处：《钢铁研究学报》2015年第8期17-23,共7页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(50874072);中国博士后科学基金资助项目(2014M561710);江苏省自然科学基金资助项目(BK20130308)

摘　　要：通过黏流活化能与温度的关系分析了wMg O、wCa O/wAl2O3和wSi O2对铝钙型预熔渣液相线温度的影响,并通过熔点实验和Fact Sage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,wMg O、wCa O/wAl2O3和wSi O2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,wMg O为4%~6%,wCa O/wAl2O3为0.8~1.0,wSi O2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Fact Sage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-Ca O base pre-molten refining slag was estimated from the activation energy for viscous flow, effects of wMg O, wCa O/wAl2O3 and wSi O2 on the liquidus temperature of slag were investigated. The estimated results were verified by melting experiments and theoretically calculated using the Fact Sage Software. Differences and connections of melting temperature and viscosity-temperature characteristics were analyzed. The results indicate that all of wMg O, wCa O/wAl2O3 and wSi O2 had obvious influence on the liquidus temperature of slag. The liquidus temperature decreased with increasing the Mg O content, and following by an increase with further increasing wMg O, the trends that the liquidus temperature changed with wCa O/wAl2O3 and wSi O2 were the same as the trend that the liquidus temperature changed with wMg O. While wMg O is between 4% and 6%, wCa O/wAl2O3 is between 4% and 6%, and wSi O2 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 finding confirms that estimate the liquidus temperatures from activation energies for viscous flow is reliable. And the liquidus temperature estimated from the activation energy for viscous flow was fall in between the value calculated using the thermodynamic software Fact Sage and the value verified by melting experiments.

关 键 词：精炼渣 黏温特性 液相线温度 

分 类 号：TF701[冶金工程—钢铁冶金]