铬质引流砂与镁碳质滑动水口界面润湿行为  

Study on Interface Wetting Behavior Between Chrome Drainage Sand and Magnesia Carbon Sliding Nozzle

作　　者：陈文 薛俊海 张海明 刘宝奎 杨鑫 Chen Wen;Xue Junhai;Zhang Haiming;Liu Baokui;Yang Xin(Liaoning Inspection,Examination&Certification Centre,Shenyang 110000,China;Angang Iron andsteel company iron plant research institute,Anshan 114051,China;School of Materials andMetallurgy,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁省检验检测认证中心,沈阳110000 [2]鞍钢股份公司炼铁总厂研究院,鞍山114051 [3]辽宁科技大学材料与冶金学院,鞍山114051

出　　处：《特殊钢》2023年第6期58-62,共5页Special Steel

基　　金：国家自然科学基金(52104331);辽宁省市监督管理局科技计划项目(2022ZC001)。

摘　　要：以某钢厂连铸用铬质引流砂为研究对象,采取经典的滴落法研究常用铬质引流砂对滑动水口材料(以MgO-C材料为主)的润湿、侵蚀行为的影响,探究铬质引流砂对滑动水口材料润湿和侵蚀机制。研究结果表明,铬质引流砂对MgO-C耐火材料的侵蚀程度较为严重,铬质引流砂中Cr、Si元素可通过溶解、扩散的方式进入MgO-C耐火材料内部,并对耐材基体造成侵蚀。针对本实验使用的铬质引流砂(w[C]为6%左右)来说,w[C]=12%的MgO-C耐火材料与引流砂接触角为71.9°,比w[C]=8%的MgO-C耐火材料与引流砂接触角为93.9°更容易被引流砂润湿和侵蚀,因此,在使用此铬质引流砂进行连铸生产时,尽可能选择使用C含量低的滑动水口更利于浇注顺行。Taking the chromium drainage sand for continuous casting of a steel plant as the research object,the classical drop method is adopted to study the influence of the commonly used chromium drainage sand on the wetting and erosion behavior of the sliding water inlet material(mainly MgO-C material),and to explore the wetting and erosion mechanism of chromium drainage sand on sliding nozzle materials.The results show that the erosion degree of chromium drainage sand on MgO-C refractory is more serious,Cr and Si elements in chromium drainage sand can enter the MgO-C refractory through dissolution and diffusion,and cause damage to the refractory matrix.For the chromium drainage sand(w[C]is about 6%)used in this experiment,MgO-C refractory with 12%carbon content and the contact angle 71.9°with drainage sand is more prone to wetting and erosion by drainage sand than MgO-C refractory with 8%carbon content and the contact angle 93.9°with drainage sand.Therefore,sliding nozzle materials with low carbon content should be selected as far as possible when using this chromium drainage sand for continuous casting production,which is more conducive to the smooth casting.

关 键 词：引流砂 滑动水口 MGO-C耐火材料 润湿 侵蚀 

分 类 号：TF702.9[冶金工程—钢铁冶金]