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Article

Effect of the Fe2O3 Addition Amount on Dephosphorization of Hot Metal with Low Basicity Slag by High-Temperature Laboratorial Experiments

1
State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
2
HBIS Handan Iron and Steel Group Co., LTD, Handan City, Hebei 056015, China
*
Author to whom correspondence should be addressed.
Academic Editor: Mark E. Schlesinger
Metals 2021, 11(3), 417; https://doi.org/10.3390/met11030417
Received: 7 February 2021 / Revised: 21 February 2021 / Accepted: 28 February 2021 / Published: 4 March 2021
In this paper, the influence of the Fe2O3 addition amount on the dephosphorization of hot metal at 1623 K with the slag of the low basicity (CaO/SiO2) of about 1.5 was investigated by using high-temperature laboratorial experiments. With increasing the Fe2O3 addition amount from 5 to 30 g, the contents of [C], [Si], [Mn] and [P] in the hot metal at the end of dephosphorization are decreased and the corresponding removal ratios increase. In dephosphorization slags, the phosphorus mainly exists in the form of the nCa2SiO4–Ca3(PO4)2 solid solution in the phosphorus-rich phase and the value of coefficient n decreases from 20 to 1. Furthermore, the oxygen potential and activity at the interface between the slag and hot metal are increased. When the oxygen potential and the oxygen activity at the interface are greater than 0.72 × 10−12 and 7.1 × 10−3, respectively, the dephosphorization ratio begins to increase rapidly. When the Fe2O3 addition amount is increased to 30 g, the ratio of the Fe2O3 addition amount to theoretical calculation consumption is around 175%, and the dephosphorization ratio reaches the highest value of 83.3%. View Full-Text
Keywords: dephosphorization; distribution ratio of phosphorus; low temperature; low basicity; Fe2O3 addition amount; hot metal dephosphorization; distribution ratio of phosphorus; low temperature; low basicity; Fe2O3 addition amount; hot metal
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MDPI and ACS Style

Yang, W.; Yang, J.; Shi, Y.; Yang, Z.; Gao, F.; Zhang, R.; Sun, H. Effect of the Fe2O3 Addition Amount on Dephosphorization of Hot Metal with Low Basicity Slag by High-Temperature Laboratorial Experiments. Metals 2021, 11, 417. https://doi.org/10.3390/met11030417

AMA Style

Yang W, Yang J, Shi Y, Yang Z, Gao F, Zhang R, Sun H. Effect of the Fe2O3 Addition Amount on Dephosphorization of Hot Metal with Low Basicity Slag by High-Temperature Laboratorial Experiments. Metals. 2021; 11(3):417. https://doi.org/10.3390/met11030417

Chicago/Turabian Style

Yang, Wenkui, Jian Yang, Yanqiu Shi, Zhijun Yang, Fubin Gao, Runhao Zhang, and Han Sun. 2021. "Effect of the Fe2O3 Addition Amount on Dephosphorization of Hot Metal with Low Basicity Slag by High-Temperature Laboratorial Experiments" Metals 11, no. 3: 417. https://doi.org/10.3390/met11030417

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