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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 14a
SUMMARY:Zero carbon ironmaking process using carbon-iron ore composites applying a carbon recycling system
DESCRIPTION:The iron making industry consumes a large amount of fossil fuel derived carbon as heat source, reducing agent of iron ores and carburizing agent of reduced iron. Carbon is an essential element for an efficient ironmaking, although hydrogen is expected to be the substitution. The carbon recycling ironmaking process by circulating CO gas has been already proposed to achieve carbon neutrality. However, the production of hot metal is not considered in this process because CO gas is not utilized as a carburizing agent. In order to apply the carbon recycling ironmaking process to the production of the hot metal, new ironmaking process of carbon solidification using porous iron whisker and production of hot metal using recovered carbon-iron ore composite is proposed in this study.
The lumps of iron whisker with high porosity, approximately 95% were obtained by heating the mixture of fine hematite reagent and biomass char at 950℃ for 75 min. The lumps were utilized as the catalyst of the carbon solidification reaction under the gas flow of CO at 600℃. The recovered solid carbon samples with different cementite/free carbon ratio were obtained by changing the reaction time. The composite made of the obtained carbon powder and hematite reagent was heated in order to proceed the reduction of the iron oxide and carburization of reduced iron. The molar ratio of carbon to oxygen in the composite was set as from 0.8 to 1.0. The composite started to be reduced at 700℃ and then reduction degree increased sharply at 900℃. The molten iron nuggets were observed on the surface of the composite samples heating up to 1300℃. These results indicate that the suggested carbon recycling ironmaking process may contribute to forward not only carbon neutrality but also rapid hot metal production.

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DTSTART:20230614T092000
DTEND:20230614T094000
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