板坯连铸二冷喷嘴对冷却效果影响的研究.pdfVIP

2 010 2 Feb. 2010 # 4 8 # 2 6 1 Steelmaking Vol. 26 No. 1 1 1 1 1 2 2 2 2 卿家胜 , 刘 青 , 王 欣 , 王先勇 , 李玉盘 , 胡志刚, 孙玉虎 , 赵彦华 ( 1. , 100 083; 2. , 056015) : , , , , , : ; ; ; ; : TF7 77 . 1 : A : 10 02-104 3( 20 10) 0 1-0048-05 Research on eff ect of nozzle on secondary cooling results in slab continuous casting process 1 1 1 1 QING Jia-sheng , LIU Qing , WANG Xin , WANG Xian- yong , 2 2 2 2 LI Y -pan , HU Zhi-gang , SUN Y -h , ZHAO Yan-h a ( 1. School of M etall rgical and Ecological Engineering, U niversity of Science and T echnology Beijing, Beijing 10 0083 , China; 2. No. 3 Steelmaking-Plant of Handan Iron and Steel Gro p Co . Ltd. , Handan 056015, China) Abstract: The secondary cooling of slab contin o s casting is one of the important fac- tors affecting the q ality of slab. In this paper , for the p rpose of solving the problem of slab q ality defects and improving slab q ality in No. 3 Steelmaking Plant of Handan Iron and Steel Gro p Co. Ltd, the nozzles of secondary cooling system are optimized. T he proper types of nozzles are determined and main factors infl encing the nozzle per- formance analyzed. On the basis of the previo s research, by means of optimization of nozzle type, pattern of nozzle arrangement and cooling w ater vol me the central segre- gation of slabs has been improved and the eq iaxed crystal ratio prominently raised. Key words: slab contin o s casting; secondary cooling; q ality ; cooling state property test; nozzle