钢包底喷粉精炼新工艺技术的开发及应用  

Development and application of a new refining process for ladle bottom powder injection

作　　者：娄文涛 朱苗勇 程中福 LOU Wen-tao;ZHU Miao-yong;CHENG Zhong-fu(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学冶金学院

出　　处：《钢铁》2018年第11期29-35,共7页Iron and Steel

基　　金：国家自然科学基金资助项目(51604071);国家重点研发计划资助项目(2017YFC0805105)

摘　　要：针对高效洁净钢生产的实际需求与发展要求,研发了钢包底喷粉精炼新工艺（L-BPI）,对涉及此新工艺的重大理论问题与关键技术开展了深入研究,揭示了钢包底喷粉的钢水渗漏和粉剂堵塞机理,提出了底喷粉元件的设计理论,研制出抗磨损和耐高温侵蚀的喷粉元件,阐明了钢包底喷粉新工艺多相流传输行为及精炼反应动力学行为,突破了超细狭缝元件中粉剂输送的关键工艺技术,开发了钢包底喷粉新型喷吹装置及自动化控制系统,并成功实施了工业应用试验。结果表明,L-BPI新工艺体现了炉外精炼的高效率和低成本,对新一代洁净钢生产流程的发展具有重要意义。Regarding the requirement and development for producing clean steel with high efficiency,a new refining process of ladle bottom powder injection（L-BPI）was developed,and some important theory and key technologies related to this new process were investigated. The mechanisms both for the leakage of molten steel and powder clogging during bottom powder injection in the ladle were revealed,and the theory of designing the device for bottom powder injection was put forward,as well as the powder injection device that is wear proof and high temperature erosion resisting was invented and made. The inherent mechanism of multiphase flow transport and refining kinetics of the L-BPI was revealed. The key process technology of powder transport in ultra-slit refractory has been a breakthrough,and the new equipment with automatic control system for the L-BPI was developed. A successful application test of L-BPI in one steelmaking plant has been made,which shows high efficiency and low cost for secondary refining and the prospective for the development of new generation of clean steel production.

关 键 词：洁净钢 钢包底喷粉 精炼新工艺 

分 类 号：TF769[冶金工程—钢铁冶金]