Reduction of Iron Ore by Uncarbonized Biomass in a Rotary Kiln Type Furnace

Murakami, Taichi; Higashi, Ryota; Maruoka, Daisuke; Kasai, Eiki

doi:10.2355/isijinternational.isijint-2021-342

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…2. 10) Alumina balls with 3 mm in diameter were filled in the bottom of the sample holder as a heater for supplied gas from lower part of the furnace. After evacuating air in the chamber, Ar-5%N 2 gas was introduced at the rate of 8.33×10 -6 Nm 3 /s under atmospheric pressure.…”

Section: Methodsmentioning

confidence: 99%

“…9) Further, iron ores fed into this process were reduced to metallic iron by CO and H 2 generated during carbonizing of biomass. 10) Ueki et al reported on the metallic iron formation observed for the composites using ceder powder and hematite reagent heated at 1000-1300°C for 0.3 ks. 11) Wei et al examined the reduction experiment of the composite using pine sawdust at 800-1250°C.…”

Section: ．Introductionmentioning

confidence: 99%

“…12) The metallic iron formation was also observed in the composite using Japanese ceder wood and pisolite ore heated up to 800°C. 10) Each report points to the rapid reduction reaction of iron oxides by volatile matters in the woody biomass. The detail mechanism, however, has been not clarified yet.…”

Section: ．Introductionmentioning

confidence: 99%

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Low Temperature Reduction Mechanism of Carbon-Iron Ore Composite Using Woody Biomass

Higashi,

Maruoka,

Kasai

et al. 2023

ISIJ Int.

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Utilization of biomass, which is regarded as a carbon neutral fuel, has been discussed to decrease in the carbon dioxide emission from the ironmaking processes. Previous reports insisted the volatile matters in the uncarbonized biomass contributed to the reduction of iron ore at low temperature. However, its mechanism has not been explained by the pyrolysis reaction of biomass components. In this study, the low temperature reduction behavior of the carbon-iron ore composite using uncarbonized biomass was compared with that using its components such as cellulose and lignin. Furthermore, the effect of volatile matters in the biomass on the reduction of iron ores was examined.The composite using uncarbonized biomass was started to be reduced at 400~450℃ by CO produced by pyrolysis of cellulose. As the temperature was further increased, iron ore was reduced to metallic iron at approximately 800℃ by hydrogen produced by the interaction between cellulose and lignin. The metallic iron may contribute to the gasification of biomass char and fast reduction reaction as the catalyst.

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Section: Methodsmentioning

confidence: 99%

Section: ．Introductionmentioning

confidence: 99%

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Low Temperature Reduction Mechanism of Carbon-Iron Ore Composite Using Woody Biomass

Higashi,

Maruoka,

Kasai

et al. 2023

ISIJ Int.

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“…As a renewable energy source and resource, biomass has great potential to be exploited in chemical looping combustion (CLC) [1][2][3][4][5][6][7], green metallurgy [8][9][10][11][12][13], and synthesis of biochar-supported metal catalysts [14][15][16][17][18]. These biomass utilization technologies involve a common reaction that is the reduction of metal oxides by biochar.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Programmed Reduction of NiO/Al2O3 by Biochar In Situ Generated from Citric Acid

Cheng

2022

Processes

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The reduction of metal oxides by biochar is an important reaction for many biomass utilization technologies. This work investigated the temperature–programmed reduction (TPR) of NiO/Al2O3 by in situ generated biochar from citric acid pyrolysis. Firstly, NiO/Al2O3 was loaded with citric acid by impregnation and then heated from ambient temperature to 900 °C in a N2 flow. The process was on–line analyzed by the TGA–FTIR technique. Secondly, a series of intermediates was obtained and characterized by XRD, CHNO elemental analysis, and temperature programmed oxidation (TPO). Lastly, a control experiment of unsupported NiO was conducted to show the influence of Al2O3 support on the NiO reduction. Results showed that the whole heating process could be resolved into two parts that is citric acid pyrolysis and NiO reduction at a heating rate of 5 °C/min. The NiO reduction occurred above 400 °C with the biochar from citric acid pyrolysis as reductant. In the temperature–programmed reduction process, the Al2O3–supported NiO exhibited three reduction phases in contrast with only one reduction phase for the unsupported NiO. A hypothesis was proposed to explain this. The presence of Al2O3 support may result in different deposition sites of biochar (on NiO or on Al2O3), and consequently different reduction mechanisms.

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Mechanism of thermal compressive strength evolution of carbon-bearing iron ore pellet without binders during reduction process

Wang,

Zhu

et al. 2024

J. Iron Steel Res. Int.

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Reduction of Iron Ore by Uncarbonized Biomass in a Rotary Kiln Type Furnace

Cited by 4 publications

References 14 publications

Low Temperature Reduction Mechanism of Carbon-Iron Ore Composite Using Woody Biomass

Low Temperature Reduction Mechanism of Carbon-Iron Ore Composite Using Woody Biomass

Temperature-Programmed Reduction of NiO/Al2O3 by Biochar In Situ Generated from Citric Acid

Mechanism of thermal compressive strength evolution of carbon-bearing iron ore pellet without binders during reduction process

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