Hydrogenmetallurgy in blast furnace carbon-hydrogen co-reduction smelting process and reductant ratio optimization
LIU Shuai
LI Bin
GUO Hanjie
Abstract：A thermodynamic model of C-H2 composite reduction was constructed based on the principle of minimum free energy,simulate the reduction process in the blast furnace bosh at 1 600℃,and quantify the indirect reduction capacity of ascending gas at 600℃.Results demonstrate that the theoretical minimum carbon consumption for pure carbon reduction is 314.72 kg per ton of iron,while C-H2 composite reduction(20%hydrogen participation)achieves synergistic effects with 279.77 kg C and 182.85 Nm3 H2 per ton of iron consumption.The reduction efficiency of hydrogen in the high-temperature zone reaches 25%,and its participation can be further improved through process optimization.Unreacted hydrogen in the system can be recovered as blast furnace gas resources.Under green hydrogen production(0.3 yuan/kWh),the technology requires a cost optimization of 144.25 yuan per ton of iron to balance carbon emission benefits,highlighting the technical potential for low-carbon transition.This study provides theoretical support for hydrogen-enriched blast furnace ironmaking,suggesting that advancements in hydrogen cycling efficiency and systemic integration could drive its scalable application.
Keywords：hydrogen-enriched blast furnace ironmakingC-H2 composite reductionminimum free energy principlehydrogen synergylow-carbon optimization
Publication Date：2025-05-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：12( 1-12 )