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VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN='8th ECIC & 9th ICSTI 2022':MAILTO:info@ecic-icsti.com
LOCATION:Room „Borgward“
SUMMARY:Investigating of hydrogenous gas injection into the blast furnace shaft and tuyere
DESCRIPTION:Although concepts for future carbon neutral steelmaking with green hydrogen are on their way, their economic feasibility is often not yet given. Enhancing the traditional BF-BOF route, responsible for 70% of steel production, towards CO2 saving is, therefore, of vital importance. A key technology for significant CO2 emission reduction of the blast furnace is to inject hydrogen-rich syngas at the shaft level. This injection enables high injection rates of hydrogenous gases such as coke oven gas, natural gas, and syngas at the tuyere level. Nevertheless, the influence of hydrogenous gas injection through tuyere and shaft on the BF internal state and overall performance needs to be thoroughly investigated before industrial application. Considering the hostile environment inside the furnace, numerical modelling is the most promising approach for acquiring the required knowledge. In this contribution, a newly developed two-dimensional and multiphase mathematical model for describing the flows and thermo-chemical behaviour of a BF is used. A thorough validation of the model has been carried out using operational data such as in-burden measurements and top gas conditions. Simulations were then carried out to predict the effect of gas injection into the BF shaft. The results show that the shaft injection brings the cohesive zone root up while remaining controlled below the syngas injection point. An increase of the reduction degree and gas temperature in the wall region is also observed. This study demonstrates the potential of the newly developed numerical model to quickly and accurately investigate innovative BF processes with minimum CO2 emissions also for cases of high hydrogen load and low coke rate.  

CLASS:PUBLIC
DTSTART:20220901T085500
DTEND:20220901T092000
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