20.500.12556/RUL-177234 Analiza življenjskega cikla valja za valjanje jeklene pločevine magistrsko delo Life cycle assessment of a work roll for steel sheet rolling master's thesis Cilj magistrske naloge je bil oceniti življenjski cikel (LCA) valja za valjanje pločevine, s poudarkom na oceni njegovih vplivov na okolje in zdravje ljudi. V teoretičnem delu naloge so predstavljeni pravni in strateški okviri evropske okoljske politike ter metodologija LCA po standardih ISO 14040 in ISO 14044. Podrobno so opisani koraki LCA: določitev cilja in obsega, izdelava inventarja, ocena vplivov ter interpretacija rezultatov. Empirični del naloge vključuje opis procesa izdelave valja v podjetju Valji d.o.o., kjer je bil analiziran valj izdelan za naročnika iz Brazilije. Analiza vključuje podatke o kemični sestavi, mikrostrukturi, toplotnih in mehanskih obdelavah ter podatke o uporabi valja, kot so obraba, brušenje in izvaljana količina pločevine. Analiza LCA je bila omejena na fazo od “vrat do vrat”, pri čemer so bile upoštevane faze izdelave in transporta. Končna interpretacija rezultatov predstavljena v zaključnem delu naloge rezultatov, je pokazala, da sta z ozirom na kategorije vplivov najbolj izrazita vpliv na izrabo materialov ter segrevanje ozračja, pri čemer je slednji posledica emisije toplogrednih plinov zaradi porabe energentov pri izdelavi in transportu. Ključne predlagane smernice za zmanjšanje vplivov vključujejo: povečano uporabo recikliranih in sekundarnih materialov pri izdelavi valja, zmanjšanje porabe energije oziroma prehod na energijo iz obnovljivih virov, optimizacijo transporta, in nadzor in potencialno zmanjšanje manjših, a prisotnih vplivov. Opravljena raziskava lahko služi kot izhodišče za nadaljnje študije ter pripomore k razvoju trajnostne strategije na področju izdelave valjev. The aim of the master’s thesis was to assess the life cycle (LCA) of a work roll for sheet metal rolling, with a focus on evaluating its environmental and human health impacts. The theoretical part of the thesis presents the legal and strategic frameworks of European environmental policy, as well as the LCA methodology according to ISO 14040 and ISO 14044 standards. The steps of the LCA are described in detail: goal and scope definition, inventory analysis, impact assessment, and interpretation of results. The empirical part of the thesis includes a description of the roll manufacturing process at the company Valji d.o.o., where the analysed roll was produced for a client from Brazil. The analysis includes data on chemical composition, microstructure, thermal and mechanical treatments, as well as data on roll use, such as wear, grinding, and the quantity of rolled sheet metal.The LCA was limited to the “gate-to-gate” phase, considering only the production and transport stages. The final interpretation of results, presented in the concluding part of the thesis, showed that, in terms of impact categories, the most significant were material consumption and global warming, the latter being a consequence of greenhouse gas emissions due to energy consumption during production and transport. The key proposed guidelines for impact reduction include: increased use of recycled and secondary materials in roll production, reduction of energy consumption or transition to renewable energy sources, transport optimisation, and monitoring and potential reduction of smaller but present environmental impacts. The conducted study can serve as a foundation for further research and contribute to the development of a sustainable strategy in the field of roll manufacturing. Ocena življenjskega cikla (LCA) delovni valj valjanje pločevine okoljski vplivi trajnostna proizvodnja. Life cycle assessment (LCA) work roll sheet metal rolling environmental impact sustainable production. true false false J. Vodlak Slovenski jezik Angleški jezik Magistrsko delo/naloga 2025-12-18 09:00:27 2025-12-18 09:00:34 2026-01-13 11:38:34 0000-00-00 00:00:00 2025 0 Ljubljana 0 Ljubljana XII, 38 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 669 112888 264495107 28440.pdf 28440.pdf 1 71826A8D18C574366C02475795189883 fdc60b87c11d189af76bbf9cbbc469d23fe95887881fe61d6f6ee3e7a60e499e 30b615b4-dbe7-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=224152 Naravoslovnotehniška fakulteta 0 0 0