Exploitation of multi-objective optimization in retrofit analysis: a case study for the iron and steel production

摘要

Over the past few decades the issues related to the energy consumption and the climate change have been increasedand they have achieved a significant position on the sustainability agenda of the steel industry. Steel production isamong the largest energy-intensive industrial processes in the world, as well as one of the most important CO2emission sources. However, the major role of steel utilisation in the modern society is undeniable.The challenges of industrial energy systems aim at achieving CO2 minimization, without neglecting energy efficiencyas well as the development of effective models and strategies for process optimization. The application of ProcessIntegration (PI) methods to the integrated steelmaking route, aims at achieving a reduction in the CO2 emission byoptimizing material and energy systems.The work presented in this paper is devoted to the development of a model for optimal exploitation of energyresources and by-products in integrated steelworks through application of multi-objective optimisation techniques.Cases of exploitation of the system within the management of the process gases are presented in a retrofit scenarioand compared to the case of nominal operation.