Wei ZHANG, Juhua ZHANG
An unsteady model of the top gas recycling oxygen blast furnace (TGR-OBF) process was established according to material and thermal balance principles. The restrictive kinetic step of the reaction in the bosh of the oxygen blast furnace was considered, as well as the key nodes’ gas recycling processes and combustion equilibrium of the shaft injection gas. Typical unsteady analyses of the TGR-OBF processes are demonstrated by the unsteady model. It is concluded that the whole TGR-OBF processes could reach equilibrium in case of reasonable operation. Based on the default conditions in this paper, it takes about 6 times for the main gas elements traveling from the tuyere zone to the furnace top until the unsteady process turns into a stable one. The fuel rate decreases from 496 kg/t to 426 kg/t and 403 kg/t when the blast oxygen content is increased from 21.5% to 50% and 98%. Instantaneously, the top gas volume drops from 1,582 Nm3 to 1,462 Nm3 and 1,031 Nm3. Because most carbonaceous gases are deprived in the VPSA segment and recycled inside the blast furnace, the CO2 emissions in the TGR-OBF cases are 206.06 Nm3 and 99.56 Nm3/t compared to the CO2 emission of 664.58 Nm3/t in the conventional blast furnace.
@article{76f7dec2-2db3-493c-9718-d558e83f0974,
title={2016 Zhang We Unsteady Analyses of the Top Gas Recycling Oxygen Blast Furnace isijinternational.isijint 2016 090},
author={Wei ZHANG and Juhua ZHANG},
year={2026},
language={en}
}TY - JOUR TI - 2016 Zhang We Unsteady Analyses of the Top Gas Recycling Oxygen Blast Furnace isijinternational.isijint 2016 090 AU - Wei ZHANG AU - Juhua ZHANG PY - 2026 LA - en ER -
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