ADVANCED RECYCLING AND REUSE OF METALLURGICAL WASTES FOR SUSTAINABLE MATERIALS PROCESSING

This project evaluates how to recycle, reuse, and add value to several kinds of metallurgical waste—steel slags, mine tailings, red‑mud (bauxite residues), and metallurgical dusts or sludges. Using circular‑economy ideas, it looks at the mechanical, chemical, and environmental performance of these secondary materials when they are turned into construction products, sources of high‑value resources, or advanced functional materials. For an M.Tech‑level study, the work concentrates on three main tasks: – **Steel‑slag substitution** – test how well steel slags can replace traditional ingredients in cement‑based mixes. – **Metal extraction** – fine‑tune hydrometallurgical or pyrometallurgical conditions to recover base metals, aiming for yields between 70 % and 95 %. – **Geopolymer and

composite synthesis** – develop high‑performance geopolymers and composite materials from the waste streams. The project also measures the possible carbon‑reduction benefit, which can reach up to 25 % lower CO₂ emissions. It examines the thermodynamic and kinetic limits that affect reagent use and energy consumption. Finally, the study provides step‑by‑step guidance for simulating and modeling the chemical phase changes and leaching behavior of heavy metals, giving a solid analytical base for sustainable material processing and industrial waste management.

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