Effects of B_2O_3 and CaF_2 on Melting Temperatures of CaO-SiO_2-Fe_2O_3 System Fluxes

作     者：WANG Hong-ming YANG Li-li LI Gui-rong ZHU Xiang ZHU Hua ZHAO Yu-tao 

作者机构：School of Materials Science and Engineering Jiangsu University Jiangsu Shasteel Group 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2013年第20卷第6期

页      面：21-24页

核心收录：

学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：Item Sponsored by National Natural Science Foundation of China ( 51174099 ) Natural Science Foundation of Jiangsu Province of China ( BK2010355 ) National Science Foundation for Post-Doctoral Scientists of China ( 20100471382 ) 

主　　题：boron oxide calcium fluoride melting temperature CaO-SiO2-Fe2O3 system steelmaking flux 

摘      要：Fluorite is widely employed as fluxing agent in metallurgy flux , which inevitably leads to serious fluorine pollution.B2O3 is employed as fluxing agent of CaO-SiO2-Fe2O3steelmaking fluxes to substitute for *** effects of B2O3 and CaF2 on the melting properties of this system were *** melting temperatures of fluxes including softening temperature （Ts）, hemispherical temperature （Th）, and flow temperature （Tf） were measured using the hemisphere *** results indicate that the fluxing effect of B2O3is more significant than that of CaF2 .When the addition amount of B2O3 （mass percent） exceeds 6% , the melting temperatures of fluxes including Ts , Th and Tf are decreased lower than 1 300℃.The basicity of fluxes has a significant effect on the melting temperature , and the melting temperatures of the fluxes increase with the increase of fluxes *** , when B2O3 is used as fluxing agent , the melting temperature changes little with the basicity increasing from 2.5 to 5.0. These characteristics are suitable for steelmaking *** , Fe2O3 has an important fluxing effect on this CaO-based steelmaking *** indicates that the fluxes system is suitable for steelmaking process.