123887 20240319081028.0 doi 10.2355/isijinternational.ISIJINT-2022-111 sideral 132322 ART-2022-132322 eng Bailera, Manuel Universidad de Zaragoza (orcid)0000-0002-9174-9820 Extending the Operating Line Methodology to Consider Shaft and Preheating Injections in Blast Furnaces 2022 Access copy available to the general public Unrestricted In the last years, the injection of reducing gases in the shaft and preparation zone of the blast furnace has been proposed as a decarbonization option, mainly associated to oxyfuel blast furnaces and top gas recycling configurations. However, the Rist diagram, which is one of the preferred methodologies to characterize the operation of blast furnaces, is not valid to evaluate these new decarbonization options. In this article we propose a generalization of the operating line methodology to extend its applicability to scenarios of variable molar flows along the blast furnace (i.e., shaft and preheating injections) and non-continuous oxidation profiles (presence of CO2 and H2O in the injected gases). The extended operating line methodology was implemented in an Aspen Plus simulation, which provides a detailed modelling of the preparation zone, the thermal reserve zone, the lower zone and the raceways. The simulation was used to validate the generalized operating line methodology through three different data sets: (i) an air-blown blast furnace with pulverized coal injection and O2 enrichment, (ii) an oxyfuel blast furnace with shaft gas injection, and (iii) an oxyfuel blast furnace with preheating gas injection in the preparation zone. In general, the discrepancy between the reference data and the simulation results is well below 3.5%, so the extended operating line methodology is considered validated. info:eu-repo/grantAgreement/EC/H2020/887077/EU/Decarbonisation of carbon-intensive industries (Iron and Steel Industries) through Power to gas and Oxy-fuel combustion/DISIPO This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 887077-DISIPO info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 1.8 2022 METALLURGY & METALLURGICAL ENGINEERING 41 / 79 = 0.519 2022 Q3 T2 0.569 2022 Metals and Alloys 2022 Q1 Mechanics of Materials 2022 Q2 Materials Chemistry 2022 Q2 Mechanical Engineering 2022 Q2 3.1 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Nakagaki, Takao Kataoka, Ryoma 5004 590 Universidad de Zaragoza Dpto. Ingeniería Mecánica Área Máquinas y Motores Térmi. 62, 12 (2022), 2454-2465 ISIJ int. ISIJ INTERNATIONAL 0915-1559 1292782 http://zaguan.unizar.es/record/123887/files/texto_completo.pdf Versión publicada 2577283 http://zaguan.unizar.es/record/123887/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:123887 articulos driver 2024-03-18-16:59:15 ARTICLE