Application and optimization of edge heater in hot-rolled silicon steel production
LIU Yang1，YANG Quan1，WANG Xiao-chen1，ZHANG Chang-li2，WANG Qiu-na3，LI Bin3
1.National Engineering Research Center of Flat Rolling Equipment，University of Science and Technology Beijing， Beijing 100083，China 2.Shougang Research Institute of Technology，Shougang Group Corporation，Beijing 100041，China 3.Hot Rolling Department of Qian’an Iron and Steel Corporation，Shougang Company Limited，Tangshan 064404，Hebei，China
Abstract：As for the application characteristics of silicon steel sheet， there is a high requirement of shape control in hot-rolled silicon steel production. Increasing of the edge temperature of slab by using Edge Heater (EH) is lately a new technology in production. The section temperature difference would be decreased and the temperature homogeneity would be improved after EH coming into use， which has remarkable effect on improving the edge quality. However， the improvement of edge temperature has some side effects， especially for the profile index (the edge drop index etc.)， which would go against shape quality in downstream procedure. According to the characteristics of EH， the working principle and equipment function were described， and the control logic and technological parameters of the EH were analyzed. Considering the crown and edge drop index， the edge cracking and edge surface unwrapping defects in production， by designing experiment of typical work conditions， the control logic and technological parameters were optimized. In this way， the optimal parameters， which were used in production lately， can be obtained. Both the edge quality and profile index of silicon steel could be assured and the rolling yield was increased.
Mao Y B, Fan L F, Yu H C, et al. Study on the edge crack of non-oriented silicon steel. J Shanghai Metals, 2012, 34(2): 57(毛一标, 樊立峰, 余红春, 等. 无取向硅钢边部缺陷的分析与解决. 上海金属, 2012, 34(2): 57)
[1]
Mao Y B, Fan L F, Yu H C, et al. Study on the edge crack of non-oriented silicon steel. J Shanghai Metals, 2012, 34(2): 57(毛一标, 樊立峰, 余红春, 等. 无取向硅钢边部缺陷的分析与解决. 上海金属, 2012, 34(2): 57)
[2]
Cao J G, Zhang J, Gan J B. Wear prediction model of working roll of non-oriented silicon steel in hot strip mill. J University of Science Technology Beijing, 2006, 28(3): 286(曹建国, 张杰,甘健斌. 无取向硅钢热轧工作辊磨损预报模型. 北京科技大学学报, 2006, 28(3): 286)
[2]
Cao J G, Zhang J, Gan J B. Wear prediction model of working roll of non-oriented silicon steel in hot strip mill. J University of Science Technology Beijing, 2006, 28(3): 286(曹建国, 张杰,甘健斌. 无取向硅钢热轧工作辊磨损预报模型. 北京科技大学学报, 2006, 28(3): 286)
[3]
Komatsubara Michiro, Hayakawa Yasuno. Edge cracking of grain-oriented silicon steel in hot-rolling and its preventive method: Japan Patent, 4-304315,1992-10-27(小松原道郎, 早川康之.取向硅钢用热轧钢板的边裂发生防止方法：日本专利, 4-304315,1992-10-27)
[3]
Komatsubara Michiro, Hayakawa Yasuno. Edge cracking of grain-oriented silicon steel in hot-rolling and its preventive method: Japan Patent, 4-304315,1992-10-27(小松原道郎, 早川康之.取向硅钢用热轧钢板的边裂发生防止方法：日本专利, 4-304315,1992-10-27)
[4]
Tetsuji Doizaki, Yoshio Abe. Bar Heater and Edge Heater technology // Proceedings of China International Steel Congress Technical Seminar. Shanghai, 2004:373(Tetsuji Doizaki, Yoshio Abe. 板带加热器 (Bar Heater) 和边部加热器技术//中国国际钢铁大会技术交流会论文集. 上海，2004:373)
[4]
Tetsuji Doizaki, Yoshio Abe. Bar Heater and Edge Heater technology // Proceedings of China International Steel Congress Technical Seminar. Shanghai, 2004:373(Tetsuji Doizaki, Yoshio Abe. 板带加热器 (Bar Heater) 和边部加热器技术//中国国际钢铁大会技术交流会论文集. 上海，2004:373)
[5]
Cui J L, Huang L, Lai H. Main composition and application of the edge heater system. J Energy For Metallurgical Industry, 2013, 32(3): 38(崔建利, 黄玲, 赖宏. 边部加热器的主要系统组成及应用. 冶金能源, 2013, 32(3): 38)
[5]
Cui J L, Huang L, Lai H. Main composition and application of the edge heater system. J Energy For Metallurgical Industry, 2013, 32(3): 38(崔建利, 黄玲, 赖宏. 边部加热器的主要系统组成及应用. 冶金能源, 2013, 32(3): 38)
[6]
Lu F X, Huang P. Edge cracking of hot-rolling grain-oriented silicon steel and its preventive method in KAWASAKI STEEL. J China Metallurgy, 2006, 16(7): 41(卢凤喜, 黄璞. 川崎取向硅钢热轧边裂及其防止方法. 中国冶金, 2006, 16(7): 41)
[6]
Lu F X, Huang P. Edge cracking of hot-rolling grain-oriented silicon steel and its preventive method in KAWASAKI STEEL. J China Metallurgy, 2006, 16(7): 41(卢凤喜, 黄璞. 川崎取向硅钢热轧边裂及其防止方法. 中国冶金, 2006, 16(7): 41)
[7]
Zhang S H. Application of control system design for edge heater // Proceedings of National Hot Rolled Strip Production Technical Seminar. Baotou, 2009:82(张世厚. 边部加热器控制系统设计及应用//全国热轧板带生产技术交流会论文集. 包头，2009:82)
[7]
Zhang S H. Application of control system design for edge heater // Proceedings of National Hot Rolled Strip Production Technical Seminar. Baotou, 2009:82(张世厚. 边部加热器控制系统设计及应用//全国热轧板带生产技术交流会论文集. 包头，2009:82)
[8]
Chen S J, Zhang Y, Miao Y C, et al. Influence of the edge heating on the flatness of hot rolled strip. J Shanghai Metals, 2000, 22(5): 28(陈少杰, 张亚, 苗雨川, 等. 边部加热对热轧带钢板形的影响. 上海金属, 2000, 22(5): 28)
[8]
Chen S J, Zhang Y, Miao Y C, et al. Influence of the edge heating on the flatness of hot rolled strip. J Shanghai Metals, 2000, 22(5): 28(陈少杰, 张亚, 苗雨川, 等. 边部加热对热轧带钢板形的影响. 上海金属, 2000, 22(5): 28)
[9]
Li H. Application of the edge heater in hot rolling wide strip. J Metallurgical Equipment, 2009, Extra Edition(1): 33(李徽. 边部加热在热轧宽带钢生产中的应用. 冶金设备, 2009, 特刊(1): 33)
[9]
Li H. Application of the edge heater in hot rolling wide strip. J Metallurgical Equipment, 2009, Extra Edition(1): 33(李徽. 边部加热在热轧宽带钢生产中的应用. 冶金设备, 2009, 特刊(1): 33)
2016, Vol. 51 
