부산대학교 도서관

Technologies to reduce CO2 emissions in the steel industry have been actively developed since theearly 1990s in order to deal with global climate change. In particular, the utilization of various types ofbiomass including wood, bamboo, grass, food and agricultural by-product are being attempted as carbonneutral fuels in the blast furnace process. In this study, an alternative reducing agent for coke and pulverizedcoal using biomass was developed and the effect on blast furnace performance and CO2 reduction wasevaluated. The first investigation was whether a burden material made of torrefied biomass mixed with ironore and coal (Iron-bearing Biomass Coke, IBC) could be used as a substitute for coke in the form of acarbonized briquette. In addition, a method of mixing torrefied biomass with pulverized coal (Bio-PC) to injectthrough tuyere in a blast furnace was examined. As a result, when coke was replaced with 10% of IBC, thereducibility of the sintered ore was improved in association with an increased CO gas utilization ratio, henceCO2 emissions decreased by 2.3%. Furthermore, the combustion efficiency of Bio-PC mixed with 10% oftorrefied biomass was improved by 13.2%, thus, the amount of CO2 emissions was calculated to decrease by4%. These results suggest that the possibility of using IBC and Bio-PC in blast furnaces, as they couldeffectively reduce CO2 emissions in the ironmaking process.
Technologies to reduce CO2 emissions in the steel industry have been actively developed since theearly 1990s in order to deal with global climate change. In particular, the utilization of various types ofbiomass including wood, bamboo, grass, food and agricultural by-product are being attempted as carbonneutral fuels in the blast furnace process. In this study, an alternative reducing agent for coke and pulverizedcoal using biomass was developed and the effect on blast furnace performance and CO2 reduction wasevaluated. The first investigation was whether a burden material made of torrefied biomass mixed with ironore and coal (Iron-bearing Biomass Coke, IBC) could be used as a substitute for coke in the form of acarbonized briquette. In addition, a method of mixing torrefied biomass with pulverized coal (Bio-PC) to injectthrough tuyere in a blast furnace was examined. As a result, when coke was replaced with 10% of IBC, thereducibility of the sintered ore was improved in association with an increased CO gas utilization ratio, henceCO2 emissions decreased by 2.3%. Furthermore, the combustion efficiency of Bio-PC mixed with 10% oftorrefied biomass was improved by 13.2%, thus, the amount of CO2 emissions was calculated to decrease by4%. These results suggest that the possibility of using IBC and Bio-PC in blast furnaces, as they couldeffectively reduce CO2 emissions in the ironmaking process.