C124 Evaluation of energy conservation in iron and steel making process by using in-plant CO recycling system
Year: 2014
Type: conference-abstract
Abstract: Japanese iron and steel manufacturing industries consume a lot of expensive imported coking coal and its consumption reduction is great challenge for the industry. In this paper, we proposed in-plant CO recycling system which supplements and alternates coking coal as a gaseous reducing agent in the blast furnace. Process flow diagrams including blast furnace with CO recycling, coke oven and hot stove were built by Aspen Plus and the effect of CO recycling on coal conservation and exergy efficiency was quantitatively evaluated. By using the CO gas separated from the BFG (Blast Furnace Gas), the coke oven gas, and the converter gas which are normally used to generate electric power, the coal consumption and the CO_2 emission decreased by 13.6 % and 7.3%, respectively, and consequently, the input exergy decreased by 10.4% while the effective output exergy from the system also decreased due to composition change of BFG.
Authors: Katsuki SUZUKI, Kentaro Hayashi, Takao NAKAGAKI, Jun ISHII, Minoru ASANUMA
Institutions: Waseda University, JFE Steel Corporation (Japan)
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2691019171