连铸用浸入式水口防结瘤研究进展  

Research progress on anti-clogging technology of submerged entry nozzle for continuous casting

作　　者：刘国齐[1,3] 李红霞 袁磊[2] 杨文刚 钱凡[1,3] 马渭奎[1,3] 于建宾 顾强[1,3] 于景坤 Liu Guoqi;Li Hongxia;Yuan Lei;Yang Wengang;Qian Fan;Ma Weikui;Yu Jianbin;Gu Qiang;Yu Jingkun(State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,Henan,China)

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471039 [2]东北大学,辽宁沈阳110819 [3]有色金属新材料与先进加工技术省部共建协同创新中心,河南洛阳471023

出　　处：《耐火材料》2021年第6期533-538,共6页Refractories

基　　金：国家自然科学基金资助项目(51932008,51772277);中原科技创新领军人才资助项目(204200510011)。

摘　　要：介绍了水口结瘤产生的原因、结瘤物的形成过程、防止水口结瘤的方法,重点综述了电场对浸入式水口结瘤的影响,包括浸入式水口荷电的基础理论和测量、浸入式水口荷电初步研究、电场条件下钢液对耐火材料润湿行为的影响、电场对熔融金属中的氧化物夹杂的影响。基于流体力学、化学等因素对耐火材料材质、结构及夹杂物颗粒传递、黏附的影响规律,通过优化工艺条件、内壁复合防堵塞材料、创新浸入式水口结构、施加物理场等开展了较多的研究,使水口结瘤问题得到了一定程度的解决,但适用性不强、结瘤机制研究不深入等问题仍然很突出;利用电场调控防止浸入式水口结瘤堵塞作为一种新兴的防堵技术,虽然已在连铸现场试验中取得了一定的效果,但施加电场方式、电场参数及设备等工艺问题还需逐步完善,对夹杂物、浸入式水口材料在高温下的表面特性还需进一步深入研究。最后指出材料与外加电场结合将成为浸入式水口防堵塞技术的重要方向。The causes,the formation process,and the prevention of submerged entry nozzle(SEN)clogging were introduced.The influence of electric field on the SEN clogging was focused on,including the basic theory and measurement of SEN charging,the preliminary research on SEN charging,the influence of molten steel on the wetting behavior of refractory materials in electric field,and the influence of electric field on the oxide inclusions in molten steel.Based on the influence of the hydrodynamics,chemistry and other factors on refractory materials,structure,inclusion particle transfer and adhesion,many anti-clogging researches have been carried out,such as optimizing process conditions,compositing anti-clogging inner lining materials,innovating SEN structure and applying physical fields,which solve the problem of SEN clogging to a certain extent.However,the problems of weak adaptability and superficial study on clogging mechanism are still prominent.The electric field control is a new technology to prevent clogging.Although it has achieved certain results in on-site continuous casting trials,some problems such as the method of applying electric field,the electric field parameters and the equipment still need to be gradually improved,and the surface characteristics of inclusions and SEN materials at high temperatures need to be further studied.It was pointed out that the combination of materials and applied electric field will become an important direction for SEN anti-clogging technology.

关 键 词：连铸 浸入式水口 夹杂物 结瘤 堵塞 电场 

分 类 号：TQ175[化学工程—硅酸盐工业]