Mise en valeur de l'andalousite dans des bétons à haute teneur en alumine

Les matériaux réfractaires -- Mise en place des différentes approches théoriques et pratiques -- La mullite -- Matières premières choisies -- Les paramètres physiques -- Les transformations à la cuisson -- Procédés de transformation : transitions de phases structurales -- Procédés de transformation : séparation de phases ou exsolution -- Méthodologie expérimentale et analyse des résultats -- Mise en place de l'expérimentation -- Résultats préliminaires -- La mullitisation -- Validation des paramètres expérimentaux

Performance prediction and assessment of reusability and recycling of refractory materials using the NDT sensoring approach and Machine Learning

Refractory materials are necessary for the Iron and Steel (I&S) sector to endure the demanding conditions of its manufacturing processes. These materials' brief service lives, which can range from a few minutes to several months, create substantial problems for consumption, disposal, and environmental effect. There is a rising need for sustainable solutions that are compliant with the European Green Deal's standards for reduced greenhouse gas emissions, increased energy efficiency, and life cycle assessments. The Concerted European Activity on Sustainable Applications of REFractories (Doctoral Network CESAREF), which aims to enhance research and practices linked to refractory material in the Iron & Steel industry, was founded in 2022 to address these concerns

Insights on numerical models to predict potential recyclability of spent refractories from steel making industry

The present study is part of the CESAREF (Concerted European action on Sustainable Applications of REFractories) doctoral network, started in late 2022. The aim of the consortium is the contribution to scientific breakthroughs inherent to refractories for steel making sector thanks to transversal competences deriving from academic and industrial realities. European green deal and circular economy targets set by EU for 2025 are also related to the massive consumption of refractory materials in the steel industry. Operative lifetimes of refractories range from hours to several months depending on their role. As a result of increasingly tightened policies and disposal costs, and due to recent supply chain shortages, end-of-life refractories recovery and recycling practices are receiving great attention. Some of the core requirements for sustainability and circularity are the reduction of open-loop and down scaling strategies, to maintain refractory materials value as long as possible, of the end-of-life materials. Over the years application of numerical models has proved to be a useful strategy for researchers facing in-use issues related to refractory materials. In this study, different finite element models (FEM) applied to end-use refractories are discussed to understand their suitability for potential recyclability prediction. Thermomechanical characterization of prior- and post-use materials allow to identify the critical issues related to numerical models' development. The comparison between empirical results and the appropriate numerical model allow us to identify suitable pathways to improve refractories sustainability

Reuse and recyclability of refractories from steel industry

Part of the CESAREF consortium, the study presented here is dedicated to the characterization of refractory material properties after usage for potential reuse and recyclability determination. The aim of this doctoral study is to provide an insight on the variation of specific materials’ key properties (such as thermal conductivity, thermal expansion, Young’s module, modulus of rupture) after operations. Mesoscale aging studies may allow to define appropriate Finite Element Models ( to foreseen operative conditions of the refractory. Furthermore, application of an adapted FMECA (Failure Modes, Effects, and Criticality Analysis) fatigue integrated approach can be a further reliable tool to better predict refractories’ lifetime. Also, MCDA (Multi Criteria Decision Approach) implementation could help in detecting the necessary strategies to define the most convenient recycling routes

EU Green Deal steelmaking challenges: recycling, reuse, hydrogen, & artificial intelligence

EU Green Deal steelmaking challenges: recycling, reuse, hydrogen, & artificial intelligence

Thermal conductivity of insulating refractory materials: Comparison of steady-state and transient measurement methods

International audienc

Prediction of performance and assessment of reusability and recycling of refractory materials using non-destructive online evaluation and machine learning algorithms

Refractory materials are necessary for the Iron and Steel (I&S) sector to endure the demanding conditions of its manufacturing processes. These materials' brief service lives, which can range from a few minutes to several months, create substantial problems for consumption, disposal, and environmental effect. There is a rising need for sustainable solutions that are compliant with the European Green Deal's standards for reduced greenhouse gas emissions, increased energy efficiency, and life cycle assessments. The Concerted European Activity on Sustainable Applications of REFractories (Doctoral Network CESAREF), which aims to enhance research and practices linked to refractory material in the Iron & Steel industry, was founded in 2022 to address these concerns