Development and application of a multi-graphite electrode DC plasma tundish heating  

作　　者：Yong Wang Cun Wang Meng-jing Zhao Jing-xin Song Shu-feng Yang Jing-she Li 

机构地区：[1]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]Beijing Aobang Advanced Materials Co.,Ltd.,Beijing 101400,China [3]Meishan I&S Co.of Baowu Group,Nanjing 210039,Jiangsu,China

出　　处：《Journal of Iron and Steel Research International》2022年第11期1800-1806,共7页

基　　金：supported by the National Natural Science Foundation of China(Grant No.52074030).

摘　　要：The world’s first three-graphite electrode direct current(DC)plasma heating system(2500 kW)was successfully put into production on the 50-t tundish of a two-strand slab caster.The single metallic torch plasma tundish heaters were reviewed.In addition,the induction heating system was also estimated.The three-graphite electrode DC plasma tundish heating(PTH)system does not require any electrode to be fitted to the tundish.Five electrodes can be used to realize uniform and fast heating of the six-strand tundish.Heating with high power can effectively eliminate the steep temperature drop of the molten steel in the tundish during ladle change-over.The system has turned out to be very reliable,simple,and maintenance-free.The heating rate is high within 0.5 to 2.0℃/min.Some heats with ultra-low superheat(2.6-11.0℃)were observed,and the molten steels were successfully cast by the powerful heating capacity and good control performance of the system in the practical production.It can be concluded that continuous casting with superheat of 5-10℃in the tundish was fully realistic with PTH.

关 键 词：Plasma tundish heating SUPERHEAT Center segregation Graphite electrode 

分 类 号：TF76[冶金工程—钢铁冶金]