CaO-MgO-Al_2O_3渣与IF钢液氧传递过程的电化学研究  

Electrochemical Study on Oxygen Transfer Process of CaO-MgO-Al_2O_3 Slag and Liquid IF Steel

作　　者：李竹 彭望君[1] 王子明 周艾琳 李建朝 张捷宇[1] Li Zhu;Peng Wangjun;Wang Ziming;Zhou Ailin;Li Jianchao;Zhang Jieyu(State Key Laboratory of Advanced Special Steel & Shanghai Key Laboratory of Advanced Ferrometallurgy& School of Materials Science and Engineering, Shanghai University, Shanghai 200072,China)

机构地区：[1]省部共建高品质特殊钢冶金与制备国家重点试验室上海市钢铁冶金新技术开发应用重点试验室和上海大学材料科学与工程学院,上海200072

出　　处：《上海金属》2018年第1期45-50,共6页Shanghai Metals

基　　金：国家自然科学基金(No.50874072)

摘　　要：采用44%CaO-5%MgO-51%A1_2O_3渣、IF钢液和铂丝构成三电极体系,通过理论分析和循环伏安法,研究了1 823 K高温下CaO-MgO-A1_2O_3渣在外加电场中的电化学行为。并借助扫描电镜与能谱分析,观察分析铂丝电极的微观形貌与析出物成分。结果表明,在本试验条件下,炉渣中的氧化物在外加电场中发生分解反应,渣金体系外加电场脱氧的电极反应受电势参数、离子浓度等因素控制。在脱氧过程中,炉渣中的(O2-)在阴极放电形成O_2析出,炉渣中的Fe^(2+)、Mg^(2+)、Ca^(2+)等在阳极被还原。炉渣中的氧势降低,钢液中的[O]向炉渣中扩散,从而达到钢液脱氧的目的。The44%CaO-5%MgO-51%A12O3slag,liquid IF steel and platinum wire were used to form a three-electrode system.The electrochemical behavior of CaO-MgO-Al2O3slag in an external electric field and at high temperature of1823K was studied by theoretical analysis and cyclic voltammetry.The microstructures and precipitates of the platinum wire were studied by means of scanning electron microscopy and energy dispersive spectroscopy.The results showed that under the experimental conditions,the oxides in the slag decomposed in the electric field.The electrode electrochemical reactions were controlled by the voltage parameters and ion concentration of the slag and IF steel systems subjected to an electric field for the purpose of removing oxygen.During the deoxidization process,the(O2-)in the slag were discharged in the cathode,thus forming oxygen precipitation,the Fe2+,Mg2+,Ca2+in the slag were reduced in the anode.Therefore,the oxygen chemical potential in the slag decreased,the oxygen in the molten steel diffused into the slag,so as to achieve the purpose of deoxidization of molten steel.

关 键 词：CaO- MgO- AL 2O 3渣 钢液脱氧 循环伏安 电化学 

分 类 号：TF701[冶金工程—钢铁冶金]