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| Study and Application of Catch Carbon to Produce HighCarbon Steel on 210 t BOF |
TIAN Zhihong1，LI Yongdong1，WANG Haibao1，
ZHANG Xiaoming1，LIU Qijiang2，LI Pengcheng2 |
| 1．Shougang Research Institute of Technology, Beijing 100041, China； 2.No.2 Steelmaking Plant of Shougang, Beijing 100041, China |
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Abstract Catch carbon is used to produce high carbon steel with double slag and catch carbon and reblowing practice. Phosphorus removal is very crucial for refining nondephosphorized hot metal to produce high carbon steel. The phosphorus content in hot metal was decreased from 0.078%0.094% to 0.027%0.038% in 5 minutes using double slag method. When the carbon content of 0.8%1.1% in steel and phosphorus content could be reduced to 0014%0.023% using catch carbon and reblowing method. Thus 0.4%0.7% tapping carbon content and less than 0.015% phosphorus in final product could be reached by using these two methods together for theirs lower tapping phosphorus due to less rephosphorization after tapping. The high oxidizability of ths slag at high carbon content in steel benefits phosphorus removal. After the application of this method, the average tapping content of carbon was increased from 0.22% to 0.4%, the total oxygen content and nitrogen content decreased by 1.6×10-6 and 51×10-6 respectively in average.
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Received: 01 January 1900
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| [1] |
YANG Li-bin, ZENG Jia-qing, DENG Yong, XU Xiao-wei, WU Li-ping. Highly efficiency and long-life combined blowing technology of big converter[J]. Iron and Steel, 2020, 55(4): 45-52. |
| [2] |
ZHOU Qi-qi1,LI Ji-peng1,2,CHENG Shu-sen1,LIU Kai1,LIU Zhao1. Application of IMCT model and KTH model in S50C steel desulfurization practice[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(4): 297-303. |
| [3] |
ZHAO Dong,ZHANG Jing,LUO Guo-ping,CHEN Yan-biao,ZHANG Xiang. Effect of SiO2 and Na2CO3 addition on gasification dephosphorization during prereduction and sintering of iron concentrate[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(3): 204-211. |
| [4] |
DONG Wen-liang, PAN Hong-wei, LUO Lei, JI Chen-xi, LI Hai-bo, TIAN Zhi-hong. Phosphorous distribution in dephosphorization slag[J]. Iron and Steel, 2020, 55(2): 75-81. |
| [5] |
CHEN Wen1,LEI Ying2,HE Wen-hao3,LIAO Zhen-hong1,WANG Xin2. Iron increase and phosphorous reduction mechanism of oolitic hematite by microwave heating[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(1): 9-19. |
| [6] |
WANG Linzhu，BAO Yanping，LI Xiang. Comparison of twostage dephosphorization during remaining #br# slagdouble slag process in converter[J]. Iron and Steel, 2019, 54(8): 37-42. |
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2009, Vol. 44 
