Materiały konferencyjne SEP 2025

6 ated on 600 kg of Covas tailings to produce a gravimetric concentrate and a magnetic concen- trate. After regrinding, tailings were reprocessed using a gravity separator. This stage resulted in the production of a concentrate and tailings (residues). Then, the gravimetric concentrate was treated by magnetic separation producing: a magnetic concentrate, a middling and non- magnetic tailings (residues), followed by dewatering (filtration) [8]. 4. ENVIRONMENTAL IMPACT OF REEs RECOVERY FROM MINING WASTE In order to assess environmental impact of REEs recovery from mining waste, an LCA meth- odology was applied. It quantifies the relevant emissions and resources consumption and the resulting environmental and health impacts as well as resource depletion issues, throughout a product or a process life cycle. The LCA study has been performed with dedicated SimaPro software and Eco-invent database, as the method for impact assessment, the ReCiPe midpoint and endpoint was chosen. The system boundaries for LCA study include: excavation and transport of secondary sources as well as beneficiation with disposal and land reclamation of the residues after beneficiation. The system boundaries do not include leaching or post-leaching separation processes. The functional unit is defined as 1000 kg of a secondary source, to be excavated and processed, as the input for all subsequent processes of REEs recovery. The results of LCA modelling for production of REEs concentrate from New Kankberg tailings is shown in figure 4. Figure 4. LCA results of the production of REEs concentrate from New Kankberg tailings [9].