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| Development and application of a new refining process for ladle bottom powder injection |
| LOU Wen-tao，ZHU Miao-yong，CHENG Zhong-fu |
| （School of Metallurgy， Northeastern University， Shenyang 110819， Liaoning， China） |
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Abstract Regarding the requirement and development for producing clean steel with high efficiency，a new refining process of ladle bottom powder injection （L-BPI） was developed，and some important theory and key technologies related to this new process were investigated. The mechanisms both for the leakage of molten steel and powder clogging during bottom powder injection in the ladle were revealed，and the theory of designing the device for bottom powder injection was put forward，as well as the powder injection device that is wear proof and high temperature erosion resisting was invented and made. The inherent mechanism of multiphase flow transport and refining kinetics of the L-BPI was revealed. The key process technology of powder transport in ultra-slit refractory has been a breakthrough，and the new equipment with automatic control system for the L-BPI was developed. A successful application test of L-BPI in one steelmaking plant has been made，which shows high efficiency and low cost for secondary refining and the prospective for the development of new generation of clean steel production.
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Received: 03 July 2018
Published: 20 November 2018
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| [1] |
JIA Ji-xiang，GUO Qing-tao，LIAO Xiang-wei，LI De-gang，NI Chong-yi，PENG Chun-lin. Unpolluted deoxidization technology with applied electric field between metal and slag[J]. Iron and Steel, 2016, 51(9): 46-50. |
| [2] |
LIN Yang，，TANG Fu-ping，SHEN Ming-gang，WANG Xiao-feng，TANG Wan-ru，AI Xin-gang. Decarburization by carbonate decomposition of CO2 in RH process[J]. Iron and Steel, 2016, 51(5): 37-40. |
| [3] |
SHEN Wei，GAO Jia-qiang. Characterization technique of microcosmic inclusions in clean steel and its application[J]. Chinese Journal of Iron and Steel, 2016, 34(4): 1-6. |
| [4] |
LIU Ying，TIAN Qing-rong，MA Li-jun. Source analysis of inclusions in molten steel in tundish for continuous casting[J]. Chinese Journal of Iron and Steel, 2016, 34(1): 55-57. |
| [5] |
GUO Kai, YANG Sen-xiang. Control of Nitrogen Content in Production of Clean Steel in Panzhihua Steel and Vanadium[J]. Iron and Steel, 2014, 49(9): 44-48. |
| [6] |
WANG Lin-song. Clean Steel Production With High Efficiency and Low Cost in Shuigang[J]. Iron and Steel, 2014, 49(6): 18-25. |
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2018, Vol. 53 
