富硼渣MgO-B_2O_3-SiO_2-FeO体系表面张力计算  

Evaluation of surface tension for MgO-B_2O_3-SiO_2-FeO boron-rich slag

作　　者：许继芳 陈栋 翁文凭 盛敏奇 张捷宇[2] 吕凡 

机构地区：[1]苏州大学沙钢钢铁学院,江苏苏州215021 [2]上海大学省部共建高品质特殊钢冶金与制备国家重点实验室,上海200072

出　　处：《中南大学学报（自然科学版）》2017年第6期1413-1419,共7页Journal of Central South University:Science and Technology

基　　金：江苏省自然科学基金资助项目(BK20130308;BK20140337);国家自然科学基金资助项目(50874072;51504155);中国博士后科学基金资助项目(2014M561710)~~

摘　　要：基于熔渣结构离子与分子共存理论和Butler方程建立MgO-B_2O_3-SiO_2-FeO体系表面张力计算模型,计算该体系及其子体系的表面张力,考察熔渣组元和温度对表面张力的影响。研究结果表明:本模型计算的相关体系熔渣表面张力与文献实验值吻合较好,模型平均相对误差为11.85%。含B_2O_3体系熔渣中,B_2O_3组元能够显著降低熔渣表面张力,纯氧化物表面张力与形成氧化物的阳离子静电势及氧化物中离子键分数有关。MgO-B_2O_3-SiO_2-FeO体系表面张力随B_2O_3含量增加和温度升高而显著降低,随着MgO/SiO_2质量比的增加而逐渐增大;当B_2O_3质量分数为17%~19%时,表面张力随FeO含量的变化规律发生改变,当B_2O_3含量较低时,熔渣表面张力随着FeO含量的增加而增大,当B_2O_3含量较高时,表面张力随着FeO含量的增加而降低。Based on the coexistence theory of ions and molecules of molten melt structure and Butler＇s equation, a thermodynamic model was developed to establish the surface tension of MgO-B2O3-SiO2-FeO system and its sub-system. The relationship between the composition and temperature and surface tension of molten slag was investigated. The results indicate that the calculated values for related systems show good agreements with the literature data, and the average error is about 11.85%. The surface tension of molten slag decreases with increasing the B2O3 content significantly in molten slag binary system. The surface tension value of pure oxide is related to the electrostatic potential of cations and the ion bond percentage in oxide. The surface tension in MgO-B2O3-SiO2-FeO system decreases significantly with increasing temperature and the B2O3 content, and increases with increasing the mass ratio of MgO to SiO2. While the B2O3 content is 17%-19%, the trends that surface tension varied with the FeO content, are changed. When the B2O3 content is low, surface tension of slag increases with the increase of the FeO content; when the B2O3 content is high, the surface tension decreases with the increase of the FeO content.

关 键 词：MgO-B2O3-SiO2-FeO熔渣 B2O3含量 表面张力 共存理论 计算模型 

分 类 号：TF01[冶金工程—冶金物理化学]