TY - JOUR
T1 - Reduction of Iron Ore by Uncarbonized Biomass in a Rotary Kiln Type Furnace
AU - Murakami, Taichi
AU - Higashi, Ryota
AU - Maruoka, Daisuke
AU - Kasai, Eiki
N1 - Funding Information:
This study was supported partly by Steel Foundation for Environmental Protection Technology and a research promotion grant from the Iron and Steel Institute of Japan. The authors greatly appreciate the experimental work of Mr.
Publisher Copyright:
© 2021 The Iron and Steel Institute of Japan.
PY - 2021
Y1 - 2021
N2 - Utilization of biomass char, which is regarded as a carbon neutral fuel, has been discussed to decrease in the carbon dioxide emission from the ironmaking processes. However, carbonization usually leads to a significant carbon loss. In this study, the direct use of uncarbonized biomass for the reduction of iron ore was attempted. First, reduction behavior of the iron ore-uncarbonized biomass composite was examined to understand the reduction mechanism at elevated temperature. Second, reduction tests using a rotary kiln type furnace were conducted to propose a new reduction process of iron ores. In this process, stainless steel balls are utilized to supply heat and pulverize carbonized biomass and reduced iron ore through collisions with balls. The effect of process parameters on the reduction behavior was examined. Metallic iron formed in the composite of iron ore and uncarbonized biomass by heating over 800°C under inert gas atmosphere. Heating these materials in a rotary kiln type furnace over 950°C also led to metallic iron formation. Increasing in the treatment temperature and time increasd reduction degree. The results showed a possibility that the HSM (heat storage material) balls accelerate the reduction of iron ore, and the carbonization and pulverization of biomass.
AB - Utilization of biomass char, which is regarded as a carbon neutral fuel, has been discussed to decrease in the carbon dioxide emission from the ironmaking processes. However, carbonization usually leads to a significant carbon loss. In this study, the direct use of uncarbonized biomass for the reduction of iron ore was attempted. First, reduction behavior of the iron ore-uncarbonized biomass composite was examined to understand the reduction mechanism at elevated temperature. Second, reduction tests using a rotary kiln type furnace were conducted to propose a new reduction process of iron ores. In this process, stainless steel balls are utilized to supply heat and pulverize carbonized biomass and reduced iron ore through collisions with balls. The effect of process parameters on the reduction behavior was examined. Metallic iron formed in the composite of iron ore and uncarbonized biomass by heating over 800°C under inert gas atmosphere. Heating these materials in a rotary kiln type furnace over 950°C also led to metallic iron formation. Increasing in the treatment temperature and time increasd reduction degree. The results showed a possibility that the HSM (heat storage material) balls accelerate the reduction of iron ore, and the carbonization and pulverization of biomass.
KW - Carbon – iron ore composite
KW - CO emission
KW - Metallization degree
KW - Reduction of iron ore
KW - Uncarbonated biomass
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U2 - 10.2355/isijinternational.ISIJINT-2021-342
DO - 10.2355/isijinternational.ISIJINT-2021-342
M3 - Article
AN - SCOPUS:85122856137
SN - 0915-1559
VL - 61
SP - 2971
EP - 2978
JO - Transactions of the Iron and Steel Institute of Japan
JF - Transactions of the Iron and Steel Institute of Japan
IS - 12
ER -