Abstract
The article discusses the results of heat and power and exergy calculations of the possibilities of new and existing technologies to reduce carbon dioxide emissions and coke consumption, increase pig iron production by injecting hydrogen and hydrogen-containing fuel additives (coke and natural gas) into the furnace, using metal additives, increasing the blast temperature, heat losses, and improving gas distribution in the blast furnace. The calculations were performed using a mathematical model of the complete energy balance of blast furnace smelting developed at the Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, and the impact of the potential of new and existing technologies on reducing CO2 emissions and technical and economic indicators of blast furnace smelting was assessed when the consumption of pulverized coal, hydrogen and hydrogen-containing fuel additives and their combinations in a wide range was changed. The limit values for the injection of hydrogen and hydrogen-containing fuel additives into the blast furnace horn have been determined, which are determined by the following factors: the degree of direct reduction of iron, theoretical combustion temperature, the presence of industrial oxygen, and the temperature of the furnace gas. The study results showed that CO2 emissions in blast furnace production can be reduced by 25-30% by making changes to blast furnace technology and depend on investments, the raw material and energy base of the steelmaker, and the level of existing blast furnace technology. The paper considers the impact of low-cost measures to increase the blast temperature, use of clean metal additives, reduce heat losses, and improve gas distribution in the blast furnace on the reduction of carbon dioxide emissions and technical and economic indicators of blast furnace smelting. The results can be useful for determining the economic feasibility of a particular measure to reduce CO2 emissions in blast furnace production.
Publisher
Institute of Ferrous Metallurgy Z.I. Nekrasova of the National Academy of Sciences of Ukraine
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