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Oxidation of carbon and silicon in Nb-bearing hot metal |
XU Zhang-yin1,2, LI Bao-wei2, ZHAO Zeng-wu2 |
(1. College of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051,Nei Mongol, China; 2. School of Materials and Metallurgy, Inner Mongolia University of Science and
Technology, Baotou 014010, Nei Mongol, China) |
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Abstract In order to investigate the oxidation pattern of the Nb in Nb-bearing hot metal, the oxidizing relation among Si, C and Nb in the hot metal at 1 550 ℃ was studied by the bottom-blown oxygen atmosphere in an intermediate frequency furnace with no slag or CaO-SiO2-Al2O3 slag with basicity of 0.538 or 1.5; equilibrium calculations about Si, C and other elements in the hot metal during blowing process were also carried out using FactSage software with various basicity of slag and without slag at various temperatures. The results show that C is oxidized in preference to Si in hot metal with the relatively low basicity slag at high temperature while Si is oxidized in preference to C with the high basicity slag at low temperature. The transition temperature of Si and C oxidization is 1 490 ℃. At blowing end in experiments, Nb couldn't be oxidized in the hot metal until the mass percent of Si decreases to 0.138% with the slag of basicity of 1.5. Moreover,the mass percent of Nb doesn't change when the mass percent of Si increases to 0.56% and the mass percent of C decreases to 0.61% in the case of the slag basicity of 0.538. The Nb-contained hot metal can be made to Nb-steel with low basicity slag at a high blowing temperature.
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Received: 15 August 2018
Published: 25 April 2019
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[1] |
周振华,车合伟,马星华,高旭.初论稀有金属矿床研究的一些重要进展[J].地质与勘探,2016,52(04):614-626.
|
[1] |
周振华,车合伟,马星华,高旭.初论稀有金属矿床研究的一些重要进展[J].地质与勘探,2016,52(04):614-626.
|
[2] |
李尚诣,周渝生,杜华云,钱桂华。铌资源开发应用技术[M].冶金工业出版社,1999.
|
[2] |
李尚诣,周渝生,杜华云,钱桂华。铌资源开发应用技术[M].冶金工业出版社,1999.
|
[3] |
Yong-li JIN, Zeng-wu ZHAO, Jie-yu ZHANG, et al. Thermodynamic Behaviors of Nb and P in Dephosphorization of Niobium-bearing Hot Metal with BaO-based Slag[J]. Journal of Iron and Steel Research, International, 2014,21(S1):39-43.
|
[3] |
Yong-li JIN, Zeng-wu ZHAO, Jie-yu ZHANG, et al. Thermodynamic Behaviors of Nb and P in Dephosphorization of Niobium-bearing Hot Metal with BaO-based Slag[J]. Journal of Iron and Steel Research, International, 2014,21(S1):39-43.
|
[4] |
Farshid Pahlevani, Hiroyuki Shibata, Nobuhiro Maruoka, et al. Behavior of Vanadium and Niobium during Hot Metal Dephosphorization by CaO–SiO2–FetO Slag[J]. ISIJ International, 2011,51(12):1624-1630.
|
[4] |
Farshid Pahlevani, Hiroyuki Shibata, Nobuhiro Maruoka, et al. Behavior of Vanadium and Niobium during Hot Metal Dephosphorization by CaO–SiO2–FetO Slag[J]. ISIJ International, 2011,51(12):1624-1630.
|
[5] |
XU Zhang-yin,ZHAO Zeng-wu,JIANG Yin-ju,LI Bao-wei. Experiment on Nb-bearing microalloyed steel made directly by Nb-bearing hot metal[J]. Iron & Steel,2015,50(4):13-16.
|
[5] |
XU Zhang-yin,ZHAO Zeng-wu,JIANG Yin-ju,LI Bao-wei. Experiment on Nb-bearing microalloyed steel made directly by Nb-bearing hot metal[J]. Iron & Steel,2015,50(4):13-16.
|
[6] |
XIA Yun-jin,GUO Xin,MA Wei-jie, et al. Effect of change of slag phase on dephosphorization of “double-slag+slag-remaining”steelmaking technology[J]. Journal of Iron and Steel Research, 2018, 30 (6):434-440.
|
[6] |
XIA Yun-jin,GUO Xin,MA Wei-jie, et al. Effect of change of slag phase on dephosphorization of “double-slag+slag-remaining”steelmaking technology[J]. Journal of Iron and Steel Research, 2018, 30 (6):434-440.
|
[7] |
赵健康.铸铁铸钢及其熔炼[M].北京:机械工业出版社,1991.
|
[7] |
赵健康.铸铁铸钢及其熔炼[M].北京:机械工业出版社,1991.
|
[8] |
徐掌印,赵增武,李保卫,李楠,路建法.含铌铁水预处理脱硅保铌的研究[J].钢铁研究学报,2013,25(03):14-17.
|
[8] |
徐掌印,赵增武,李保卫,李楠,路建法.含铌铁水预处理脱硅保铌的研究[J].钢铁研究学报,2013,25(03):14-17.
|
[9] |
项长祥,王丽君.低硅铁水冶炼中的选择性氧化新模式[J].钢铁,2012,47(02):34-38.
|
[9] |
项长祥,王丽君.低硅铁水冶炼中的选择性氧化新模式[J].钢铁,2012,47(02):34-38.
|
[10] |
蔡可森,李晶,周朝刚,杨克枝.LF精炼钢液回磷动力学模型[J].铸造技术,2013,34(09):1183-1186.
|
[10] |
蔡可森,李晶,周朝刚,杨克枝.LF精炼钢液回磷动力学模型[J].铸造技术,2013,34(09):1183-1186.
|
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