ПЕРСПЕКТИВИ ВИКОРИСТАННЯ ВОДНЮ ТА ВОДНЕВМІСНИХ ДОБАВОК ДЛЯ ЗМЕНШЕННЯ ВИКИДІВ СО2 І ПОКРАЩЕННЯ ПОКАЗНИКІВ ДОМЕННОЇ ПЛАВКИ

O. CHAIKA; B. KORNILOV; I. MYRAVYOVA; A. MOSKALYNA; V. LEBID; M. IVANCHA

doi:10.15407/scine20.05.035

Authors

O. CHAIKA Iron and Steel Institute named Z. I. Nekrasov National Academy of Sciences of Ukraine https://orcid.org/0000-0003-1678-2580
B. KORNILOV Iron and Steel Institute named Z. I. Nekrasov National Academy of Sciences of Ukraine https://orcid.org/0000-0002-5544-3023
I. MYRAVYOVA Iron and Steel Institute named Z. I. Nekrasov National Academy of Sciences of Ukraine https://orcid.org/0000-0001-5926-7787
A. MOSKALYNA Iron and Steel Institute named Z. I. Nekrasov National Academy of Sciences of Ukraine https://orcid.org/0000-0001-9552-2853
V. LEBID Iron and Steel Institute named Z. I. Nekrasov National Academy of Sciences of Ukraine https://orcid.org/0000-0003-3938-3785
M. IVANCHA Iron and Steel Institute named Z. I. Nekrasov National Academy of Sciences of Ukraine https://orcid.org/0000-0002-5366-9328

DOI:

https://doi.org/10.15407/scine20.05.035

Keywords:

ecology, blast furnace, CO2 emissions, hydrogen, coke gas, natural gas, coke

Abstract

Introduction. Global warming is currently one of the most important problems of humanity, the dominant cause of which is the anthropogenic factor, particularly, a signifi cant increase in greenhouse gases. Given the extremely negative consequences of this process in the future, in 2015, 195 countries, including Ukraine, ratified the Paris Climate Agreement that obliges them to reduce CO₂
emissions, in particular in the steel industry, where carbon pollution is extremely high: 6% globally and 26% in Ukraine, as of the beginning of 2022.
Problem Statement. According to the International Energy Agency, blast furnace production will be the dominant steelmaking process by 2050, with a thermal efficiency of over 90%. The introduction of new steelmaking technologies may lead to a 50% reduction in conventional steelmaking by 2050, but requires significant investments.
Purpose. To study the effect of using hydrogen-containing fuel in a blast furnace on carbon dioxide emissions and the technical and economic indicators of blast furnace smelting.
Materials and Methods. To assess the potential of using hydrogen and hydrogen-containing fuels in a blast furnace for reducing CO₂emissions and the technical and economic indicators of blast furnace smelting, we have used the mathematical model of the complete energy balance of blast furnace smelting, as developed at the Institute of Ferrous Metallurgy of the National Academy of Sciences of Ukraine.
Results. We have analyzed and established the regularities of the effect of hydrogen and hydrogen-containing fuel additives on CO₂ emissions and the blast furnace performance indicators, such as iron production, coke consumption, and secondary energy resources. The critical consumption of fuel additives, at which full iron recovery is expected to be achieved by an indirect method, has been determined. The coefficient of coke replacement by coke oven gas and hydrogen has been found.
Conclusions. The efficiency of using hydrogen and hydrogen-containing fuels separately and in combination with pulverized coal has been proven. It is a promising way to select the rational blast furnace operating conditions in terms of environmental (CO₂ emissions reduction) and economic feasibility.

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