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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 14b
SUMMARY:Analysis of new and existing technologies for reducing carbon dioxide emissions based on the energy balance of blast furnaces
DESCRIPTION:The article discusses results of calculations of energy and exergy balances in blast furnaces with possibilities of new and existing technologies for reducing carbon dioxide emissions and reducing coke consumption, increasing production of pig iron by injection into the hearth hydrogen and hydrogen containing fuel additives (coke oven, BOF, or natural gases), use of scrap, enriched top gas, increasing blast temperature, reducing heat loss and improving gas utilization. 
Calculations were carried out using original mathematical model developed in the ISI NASU for blast furnace total energy balance. There were assessed impacts of different technologies on reducing CO2 emissions and technical and economic blast furnace operating indexes in depending on changes in pulverized coal consumption, hydrogen and hydrogen-containing fuel additives rate and their combinations in a wide range.
Have been determined limits of hydrogen and hydrogen-containing fuel additives for injection into the hearth of blast furnace, by the following factors: degree of direct reduction of iron, RAFT range, the availability of oxygen for blast enrichment and top gas temperature.
Outcomes of study disclosed that CO2 emissions of blast furnace ironmaking can be reduced up to 25-30% by evolution of blast furnace operations which depends on investments, quality of raw materials, available energy, level of existing blast furnace operations technology. 
The effects of injection of preheated enriched top gas, clean scrap additives use, heat losses drop, actions to increase hot blast temperature, and optimization of gas distribution in the blast furnace on carbon dioxide emissions decreasing and technical and economic indicators of blast furnace operation were investigated.
The results can be useful for determining the economic feasibility of different technological actions to reduce CO2 emissions in blast furnace ironmaking. 



CLASS:PUBLIC
DTSTART:20230615T092000
DTEND:20230615T094000
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