MgO-B_2O_3二元系熔渣质量作用浓度计算模型  

Mass action concentration calculation model for MgO-B_2O_3 slag melt

作　　者：王广[1] 王静松[1] 薛庆国[1] 丁银贵[1] 

机构地区：[1]北京科技大学冶金与生态工程学院生态与循环冶金教育部重点实验室,北京100083

出　　处：《中国有色金属学报》2011年第12期3143-3148,共6页The Chinese Journal of Nonferrous Metals

基　　金：中央高校基本科研业务费专项资金资助项目(FRF-MP-09-001A);攀枝花钒钛磁铁矿高效分离与资源综合利用技术开发项目(2008BAB32B05)

摘　　要：依据化学中广泛应用的同系线性规律,拟合钙、镁复合化合物标准反应吉布斯自由能之间的线性关系式,然后由3CaO.B2O3和2CaO.B2O3的标准反应吉布斯自由能求得3MgO.B2O3和2MgO.B2O3的标准反应吉布斯自由能,进而基于炉渣结构的共存理论和相图,推导MgO-B2O3二元渣系的热力学计算模型。结果表明:1 460℃时,在浓度为0.45<x(MgO)<0.80的范围内,理论计算的MgO-B2O3渣系的作用浓度N(B2O3)的变化规律与实测活度α(B2O3)是相同的,且拟合较好。According to the homologous linear rule, which was applied widely in the chemistry area, the linear equation between the standard reaction Gibbs free energy of calcium and magnesium composite compounds was fitted out. The standard reaction Gibbs free energy of 3MgO·B2O3 and 2MgO·B2O3 were obtained from the reaction of 3CaO-B203 and 2CaO·B203. And then, the thermodynamic calculation model was deduced for MgO-B2O3 slag melt based on the coexistence theory of slag structure and phase diagram. The calculated results indicate that the variation trend of theoretically calculated mass action concentrations of B203 agrees well with the measured activities in the reference at 1 460 ℃ in the concentration range of 0.45 〈x（MgO）〈 0.80. Therefore, this above mentioned model has a certain extent

关 键 词：炉渣 共存理论 质量作用浓度 活度 同系线性规律 

分 类 号：TF01[冶金工程—冶金物理化学]