Application of ISPC index for performance of semisteel in dephorization furnace
DONG Wen-liang1, LUO Lei2, DENG Xiao-xuan1, JI Chen-xi1, LI Hai-bo1, TIAN Zhi-hong1
1. Research Institute of Technology, Shougang Group Co., Ltd., Beijing 100043, China 2. Shougang Jingtang United Iron and Steel Co., Ltd., Tangshan 063200, Hebei, China
摘要 为了建立评价脱磷炉半钢冶金效果的指数,在常规转炉冶金效果分析时,ISCO(Index for Selective Carbon Oxidation)指数、BOC(Balance of Oxygen and Carbon feeding rate)指数和炉渣TFe、脱磷率等冶金效果有较好的对应关系,转炉终点碳氧积可以综合考虑转炉终点碳质量分数及氧质量分数,这3个指数均可以用来衡量复合吹炼转炉冶金特性。然而在脱磷炉半钢冶炼效果并没有衡量的指数,建立选择性脱磷脱碳指数ISPC(Index for Selective dePhosphorization and deCarburization),并将该应用于脱磷炉工业生产的数据分析中,可以用来综合反映半钢冶金效果。ISPC指数越高表明脱磷保碳效果越好,半钢碳质量分数随着ISPC指数的增加而增加,半钢磷质量分数随着ISPC指数的增加而降低。半钢温度和底吹强度是影响ISPC指数的主要因素。ISPC指数随半钢温度的降低而增加,低温使得磷的氧位低于碳元素,脱磷保碳程度更好。ISPC指数随着底吹强度的增加而增加,并能较好地反映出炉底状态和动力学条件。
Abstract:In order to establish an index for evaluating the semi-steel metallurgical effect of dephosphorization furnace. In the analysis of the metallurgical effect of the conventional converter, the ISCO(Index for Selective Carbon Oxidation) index and the BOC (Balance of Oxygen and Carbon feeding rate)index have a good correspondence with the TFe of slag and the dephosphorization. The w(C)× w(O) value at the end of the converter can comprehensively consider the mass percent of carbon and the mass percent of oxygen. All three indexes above can be used to measure the metallurgical properties of converters. However, in the dephosphorization furnace, there is no comprehensive index for measuring the effect of semi-steel. the selective dephosphorization and decarburization index ISPC were established, and applies the ISPC index to industrial productions, which can be used to reflect the semi-steel metallurgy effect. When the ISPC index is higher, the dephosphorization is higher and the decarburization is lower. The carbon content of semi-steel increases with the increasing of the ISPC index. The phosphorus content of semi-steel decreases with the increasing of the ISPC index. The temperature and the bottom blowing intensity are the main factors affecting the ISPC index. The ISPC index increases with the decreasing of the temperature of the semi-steel. The low temperature makes the oxygen in equilibrium with phosphorus lower than that of carbon, and the degree of dephosphorization and carbon preservation is higher. The ISPC index increases with the increasing of the bottom blowing intensity, and can better reflect the bottom tuyere state and dynamic conditions.
董文亮, 罗磊, 邓小旋, 季晨曦, 李海波, 田志红. 脱磷炉半钢冶金效果评价指数ISPC的应用[J]. 钢铁, 2019, 54(12): 42-47.
DONG Wen-liang, LUO Lei, DENG Xiao-xuan, JI Chen-xi, LI Hai-bo, TIAN Zhi-hong. Application of ISPC index for performance of semisteel in dephorization furnace. Iron and Steel, 2019, 54(12): 42-47.
野崎努. 底吹转炉法:引进·搅拌效果·顶底复合吹炼[M].北京:冶金工业出版社, 2008.(Tsutomu Nozaki. Bottom Blown Converter Introduction, Elucidation of Mixing Phenomena and Extensive Development[M]. Beijing: Metallurgical Industry Press, 2008.)
[3]
Kyoji Nakanishi, Koji Sanbong. Recent development of Q-BOP/OBM steelmaking[J]. Tetsu-to-Hagané, 1979, 65(1): 138.
[2]
Yasuo Kishimoto, Noritaka Saito. Development and prospect of combined blowing converter in Japan[J]. Tetsu-To-Hagane, 2014, 100 (4): 445.
[4]
Tsutomu Nozaki, Kyoji Nakanishi, Hitoshi Morishita. Characteristics of dephosphorization in a bottom blown converter and its application to the preliminary treatment of hot metal [J]. Tetsu-To-Hagane, 1982, 68 (13): 1737.
[5]
Tsuyoshi Kai, Kazuo Okohira, Masazumi Hirai,et al.Influence of bath agitation intensity on metallurgical characteristics in top and bottom blown converter[J]. Tetsu-to-Hagané,1982(68), 1946.
[3]
Kyoji Nakanishi, Koji Sanbong. Recent development of Q-BOP/OBM steelmaking[J]. Tetsu-to-Hagané, 1979, 65(1): 138.
[6]
左锐, 刘小鸥. 降低转炉钢水终点碳氧积技术实践[J]. 武钢技术, 2005, 43(6):5.(ZUO Rui, LIU Xiao-ou. Practical application of end-point carbon-oxygen equilibrium control technology in BOF[J]. WISCO Technology, 2005, 43(6):5.)
[7]
许振南,徐安军,邓帅.基于辅料成本控制的京唐脱磷炉终点优化模型[J].中国冶金,2018,28(11):58.(XU Zhen-nan,XU An-jun,DENG Shuai.End-point optimization model of Jingtang dephosphorization furnace based on material cost control[J].China Metallurgy,2018,28(11):58.)
[8]
武珣, 包燕平, 岳峰, 等. 影响转炉终点碳氧积的因素分析[J]. 钢铁研究, 2010, 38(2):26.(WU Xun,BAO Yan-ping,YUE Feng, et al. Study on factors to affect the product of carbon content and oxygen content at blowing end-point of BOF steelmaking[J]. Research on Iron and Steel, 2010, 38(2):26.)
[9]
吴康, 夏富春, 郑毅. 复吹转炉钢水终点碳氧积的控制[J]. 炼钢, 2010, 26(4):8.(WU Kang,XIA Fu-chun,ZHENG Yi. Control of the molten steel end-point carbon-oxygen equilibrium in combined blow converter[J]. Steelmaking, 2010, 26(4):8.)
[10]
孙亮,朱良,赵晓东.迁钢转炉复吹的进步[J].中国冶金,2018,28(5):47.(SUN Liang,ZHU Liang,ZHAO Xiao-dong,et al.Progress of converter combined blowing at Qiansteel[J].China Metallurgy,2018,28(5):47.)
[11]
徐匡迪, 肖丽俊. 转炉铁水预处理脱磷的基础理论分析[J]. 上海大学学报:自然科学版, 2011, 17(4):331.(XU Kuang-di,XIAO Li-jun. Theoretical analysis of hot metal dephosphorization pretreatment in converter[J]. Journal of Shanghai University:Natural Science, 2011, 17(4):331.)
[4]
Tsutomu Nozaki, Kyoji Nakanishi, Hitoshi Morishita. Characteristics of dephosphorization in a bottom blown converter and its application to the preliminary treatment of hot metal [J]. Tetsu-To-Hagane, 1982, 68 (13): 1737.
[12]
Hideaki Suito, Ryo Inoue. Thermodynamics on control of inclusion composition in ultra clean steels[J]. ISIJ International,1996,36(5):536.
[5]
Tsuyoshi Kai, Kazuo Okohira, Masazumi Hirai,et al.Influence of bath agitation intensity on metallurgical characteristics in top and bottom blown converter[J]. Tetsu-to-Hagané,1982(68), 1946.
[6]
左锐, 刘小鸥. 降低转炉钢水终点碳氧积技术实践[J]. 武钢技术, 2005, 43(6):5.(ZUO Rui, LIU Xiao-ou. Practical application of end-point carbon-oxygen equilibrium control technology in BOF[J]. WISCO Technology, 2005, 43(6):5.)
[7]
许振南,徐安军,邓帅.基于辅料成本控制的京唐脱磷炉终点优化模型[J].中国冶金,2018,28(11):58.(XU Zhen-nan,XU An-jun,DENG Shuai.End-point optimization model of Jingtang dephosphorization furnace based on material cost control[J].China Metallurgy,2018,28(11):58.)
[8]
武珣, 包燕平, 岳峰, 等. 影响转炉终点碳氧积的因素分析[J]. 钢铁研究, 2010, 38(2):26.(WU Xun,BAO Yan-ping,YUE Feng, et al. Study on factors to affect the product of carbon content and oxygen content at blowing end-point of BOF steelmaking[J]. Research on Iron and Steel, 2010, 38(2):26.)
[9]
吴康, 夏富春, 郑毅. 复吹转炉钢水终点碳氧积的控制[J]. 炼钢, 2010, 26(4):8.(WU Kang,XIA Fu-chun,ZHENG Yi. Control of the molten steel end-point carbon-oxygen equilibrium in combined blow converter[J]. Steelmaking, 2010, 26(4):8.)
[10]
孙亮,朱良,赵晓东.迁钢转炉复吹的进步[J].中国冶金,2018,28(5):47.(SUN Liang,ZHU Liang,ZHAO Xiao-dong,et al.Progress of converter combined blowing at Qiansteel[J].China Metallurgy,2018,28(5):47.)
[11]
徐匡迪, 肖丽俊. 转炉铁水预处理脱磷的基础理论分析[J]. 上海大学学报:自然科学版, 2011, 17(4):331.(XU Kuang-di,XIAO Li-jun. Theoretical analysis of hot metal dephosphorization pretreatment in converter[J]. Journal of Shanghai University:Natural Science, 2011, 17(4):331.)
[12]
Hideaki Suito, Ryo Inoue. Thermodynamics on control of inclusion composition in ultra clean steels[J]. ISIJ International,1996,36(5):536.