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Simulation of Blast Furnace Operation with Intensive Hydrogen Injection

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Title: Simulation of Blast Furnace Operation with Intensive Hydrogen Injection
Authors: Nogami, Hiroshi Browse this author
Kashiwaya, Yoshiaki Browse this author →KAKEN DB
Yamada, Daisuke Browse this author
Keywords: blast furnace
numerical simulation
Issue Date: Aug-2012
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 52
Issue: 8
Start Page: 1523
End Page: 1527
Publisher DOI: 10.2355/isijinternational.52.1523
Abstract: Recent years various trials to decrease carbon dioxide emission from iron and steelmaking industries have been made. One of these trials is utilization of hydrogen in blast furnace process, and this study performed numerical simulation of blast furnace operation with hydrogen injection through tuyere. The simulations were carried out under the conditions of constant bosh gas flow rate, adiabatic flame temperature and hot metal temperature. The simulation results showed that the temperature level in the stack part was decreased with increase in the hydrogen injection ratio. This resulted in the lowering of the top gas temperature and retarded the reduction of iron oxide especially one of magnetite. The injection of the hydrogen remarkably decreased the coke rate. The converted reducing agent rate, that is sum of coke rate and six times (molecular weight ratio of carbon to hydrogen gas) as hydrogen rate showed small change. Although this decrease in coke rate deteriorated the permeability of the burden materials in the furnace, pressure drop in the furnace was reduced. Since the molar flow rate of the reducing gas was kept constant, the decrease in the gas density due to the increase in the hydrogen content was mainly considered to lead the decrease in the pressure drop. The water gas shift reaction played an important role in the generation of the field of gas composition, thus this reaction has to be carefully discussed for further utilization of hydrogen in blast furnace.
Rights: 著作権は日本鉄鋼協会にある
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 柏谷 悦章

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