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| 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 |
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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.
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Received: 29 January 2019
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|
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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.)
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2019, Vol. 54 
