旋转床CO还原澳大利亚PB粉特性及动力学研究

doi:10.13228/j.boyuan.issn1006-6543.20160130

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Abstract The experimental study on the direct reduction of Australian PB powder by CO was carried out by using a self-developed small-scale rotating bed reactor combined with chemical analysis and X-ray diffraction analysis. The results show that when the CO flow rate is 200 mL/min， the particle size range is 0.044-0.089 mm， the reduction time is 60 min， and the reduction temperature is 1 000 ℃， the reduction rate and metallization rate of reduced product are 92.70% and 86.28%， respectively. Kinetic analysis for Australian PB powder reduction reaction was carried out based on the shrinking unreacted core model at 700-1 000 ℃. It is concluded that the reduction process is controlled by the gas internal diffusion and interface chemical reaction in the initial stage[(t＜30 min)，]and the limiting step of reduction reaction is gas internal diffusion in the final stage[（t＞30 min）]with the pre-exponential factor of[A]is 0.006 72 s－1 and the apparent activation energy of[E]is 10.043 kJ/mol.

Key words： Australian PB powder rotary bed reactor carbon monoxide reduction reduction kinetics activation energy

Received: 09 November 2016 Published: 09 June 2017

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	Articles by authors
	WEI Zheng
	LIU Gai-Huan
	JIA Jiang-Ning
	DONG Yue
	ZHAO Xiu-Li
	ZHANG Yong-Fa

Cite this article:

WEI Zheng,LIU Gai-Huan,JIA Jiang-Ning, et al. Study on characteristics and kinetics of Australian PB powder reduced by CO in rotary bed[J]. , 2017, 27(03): 21-27.

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http://edit.chinamet.cn/Jweb_fmyjgy/EN/10.13228/j.boyuan.issn1006-6543.20160130 OR http://edit.chinamet.cn/Jweb_fmyjgy/EN/Y2017/V27/I03/21

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