Comparative Study on the Kinetics of the Isothermal Reduction of Iron Ore Composite Pellets Using Coke, Charcoal, and Biomass as Reducing Agents

Yuan, Xiaoli; Luo, Fuming; Liu, Shifeng; Zhang, Mingyuan; Zhou, Dongshan

doi:10.3390/met11020340

Open AccessArticle

Comparative Study on the Kinetics of the Isothermal Reduction of Iron Ore Composite Pellets Using Coke, Charcoal, and Biomass as Reducing Agents

by

Xiaoli Yuan

^1,*,

Fuming Luo

¹,

Shifeng Liu

^2,*

,

Mingyuan Zhang

¹ and

Dongshan Zhou

¹

School of Metallurgy and Material Engineering, Chongqing University of Science and Technology, Chongqing 401331, China

²

College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

^*

Authors to whom correspondence should be addressed.

Metals 2021, 11(2), 340; https://doi.org/10.3390/met11020340

Submission received: 23 January 2021 / Revised: 15 February 2021 / Accepted: 16 February 2021 / Published: 18 February 2021

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Abstract

The kinetics of the isothermal reduction of iron ore–coke, iron ore–charcoal, and iron ore–biomass (straw) composite pellets were studied at 900–1200 °C. Compared with the other two composite pellets, the composite pellet using biomass as a reducing agent showed a more rapid reduction rate at a relatively low temperature. With an increase in the temperature, the reduction rates of the three different composite pellets tended to be equal. The reducing reactions of the three different composite pellets were all mainly controlled by gasification diffusion. The reduction rates can be described by the interface reaction kinetic model (

{[1 - {(1 - m)}^{1 / 3}]}^{2} = k t

). The apparent activation energies of the gasification diffusion of coke, charcoal, and biomass composite pellets at 900–1200 °C were calculated using the Arrhenius equation, and they were 95.81, 71.67, and 58.69 kJ/mol, respectively. The biomass composite pellets exhibited a lower apparent activation energy than the composite pellets with other reduction agents.

Keywords: composite pellets; biomass; isothermal reduction; kinetics; activation energy

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MDPI and ACS Style

Yuan, X.; Luo, F.; Liu, S.; Zhang, M.; Zhou, D. Comparative Study on the Kinetics of the Isothermal Reduction of Iron Ore Composite Pellets Using Coke, Charcoal, and Biomass as Reducing Agents. Metals 2021, 11, 340. https://doi.org/10.3390/met11020340

AMA Style

Yuan X, Luo F, Liu S, Zhang M, Zhou D. Comparative Study on the Kinetics of the Isothermal Reduction of Iron Ore Composite Pellets Using Coke, Charcoal, and Biomass as Reducing Agents. Metals. 2021; 11(2):340. https://doi.org/10.3390/met11020340

Chicago/Turabian Style

Yuan, Xiaoli, Fuming Luo, Shifeng Liu, Mingyuan Zhang, and Dongshan Zhou. 2021. "Comparative Study on the Kinetics of the Isothermal Reduction of Iron Ore Composite Pellets Using Coke, Charcoal, and Biomass as Reducing Agents" Metals 11, no. 2: 340. https://doi.org/10.3390/met11020340

APA Style

Yuan, X., Luo, F., Liu, S., Zhang, M., & Zhou, D. (2021). Comparative Study on the Kinetics of the Isothermal Reduction of Iron Ore Composite Pellets Using Coke, Charcoal, and Biomass as Reducing Agents. Metals, 11(2), 340. https://doi.org/10.3390/met11020340

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Comparative Study on the Kinetics of the Isothermal Reduction of Iron Ore Composite Pellets Using Coke, Charcoal, and Biomass as Reducing Agents

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