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| Research on Deoxidation Theory During KR Hot Metal Desulphurization Process |
| LI Ning,GUO Han-jie，NING An-gang |
| School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract The oxygen content in hot metal was theoretically calculated based on ［Al］-［O］ equilibrium as well as ［C］-［O］ equilibrium at 1573K by the formulas of the minimum deoxidation balance theory in metal phase. The calculated minimum oxygen content is about 34×10-6 or 0.015×10-6 controlled by ［C］-［O］ or ［Al］-［O］ equilibrium, respectively. The calculated minimum oxygen content controlled by ［C］-［O］ equilibrium is about 4 times as great as the determined oxygen content by ［C］-［O］ equilibrium. Therefore, the oxygen potential of hot metal was controlled during KR hot metal desulphurization process by the aluminum deoxidation process. In addition, the calculated results show that the silicon deoxidation ability is far lower than that of carbon as well as aluminum during hot metal pretreatment operations, and the formulas of the minimum deoxidation balance theory in metal phase can be used to determine oxygen content in hot metal pretreatment with good accurate. The calculated results show that the deoxidation reaction by adding about 0.44kg aluminum per ton hot metal can make hot metal temperature increase 20℃. This function can to some degree counteract the temperature decrease caused by stirring and adding dedesulfurizer during KR hot metal desulphurization process.
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Received: 07 March 2011
Published: 01 November 2011
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| [1] |
GAO Jian- jun,,WAN Xin- yu,,QI Yuan- hong,,WANG Feng,. Technical analysis on ironmaking process of rotary kiln pre- reduction and smelting by coal and oxygen[J]. , 2018, 30(2): 91-96. |
| [2] |
CHEN Wei，WANG Jian- jun，CHANG Li -zhong，PENG Cheng- song，MENG Li- peng. Efficiency?of?deoxidation?by?using?methane?and?the?morphology?of?inclusions?after?deoxidation?in?molten?steel[J]. Chinese Journal of Iron and Steel, 2017, 42(2): 48-53. |
| [3] |
ZHANG Chuang，ZHOU Li，ZHU Li-Yan，XIE Yi-Kui. Influence of ladle stuffing sand on cleanliness of molten steel in tundish[J]. , 2017, 42(06): 46-49. |
| [4] |
LIN Teng- chang,ZHU Rong,ZENG Jia- qing. Thermodynamic simulation of slag- steel O- equilibrium based on 20CrMnTi refining composition[J]. Chinese Journal of Iron and Steel, 2016, 28(3): 48-50. |
| [5] |
WANG Xin-chao, YOU Zhi-min, CHENG Guo-guang, KOU Yu-shan, ZUO Hui, CHEN Lie. 20Cr13 Stainless Steel Smelted by VOD Furnace Under Silicon Deoxidation Process[J]. Iron and Steel, 2014, 49(8): 31-34. |
| [6] |
LI De-jun,WANG Qiang,OUYANG Ren-hua,LIU Xing-an. Calculation Analysis of Stuffing Sand on Molten Steel Oxygen Content[J]. Chinese Journal of Iron and Steel, 2012, 1(3): 38-41. |
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2011, Vol. 46 
