THERMODYNAMIC ANALYSIS OF THE BLAST FURNACE PROCESS UNDER THE CONDITIONS OF TOP GAS RECIRCULATION AND HIGH OXYGEN ENRICHMENT OF THE BLAST
Abstract
The blast furnace process is the dominant technology in worldwide iron metallurgy. The basic fuel in this process is coke. However, coke production is associated with several adverse environmental impacts. The reduction of coke consumption in a blast furnace can be achieved by injection of auxiliary fuels or by changing the parameters of the blast. The recirculation of the top gas into the process after CO2 and H2O removal and the high enrichment of the blast with oxygen are considered to be future technologies conducive to the reduction of coke consumption. The paper presents the influence of the above-mentioned technologies on the operating parameters of the blast furnace plant. The simulation calculations were performed using the formulated theoretical-empirical mathematical model of the blast furnace plant. The mathematical model of the blast furnace is built based on the mass and energy balances of its separated temperature zones. The balances of the elements and also the energy balance equation have been set up separately for the top zone of heat transfer and the lower zone of production together with the thermal reserve zone. The balances of elements and the energy balance also for the tuyére zone have been applied. The advanced data validation and reconciliation method to eliminate incompatibilities of selected balances of mass and energy of the temperature zones of the blast furnace for the so-called basic measurement of its raw materials and energy consumption indicators in the steady-state of operation has been applied. The carried out simulation calculations showed a significant saving of coke in the process under top-gas recirculation after CO2 and H2O removal and oxygen enrichment of the blast conditions.
Published
2023-10-10
How to Cite
MICHALSKI, Daniel Piotr.
THERMODYNAMIC ANALYSIS OF THE BLAST FURNACE PROCESS UNDER THE CONDITIONS OF TOP GAS RECIRCULATION AND HIGH OXYGEN ENRICHMENT OF THE BLAST.
Journal of Power Technologies, [S.l.], v. 103, n. 3, p. 173-191, oct. 2023.
ISSN 2083-4195.
Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/1825>. Date accessed: 14 dec. 2024.
Issue
Section
Contemporary Problems of Thermal Engineering 2022
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).