20.500.12556/RUL-159036 Možnost pridobivanja težkih mineralov iz rdečega mulja z gravitacijsko in magnetno separacijo magistrsko delo Possibility of heavy minerals extraction from red mud with gravity and magnetic separation master's thesis Rdeči mulj nastaja kot stranski produkt pri hidrometalurški proizvodnji glinice (Al2O3) iz aluminijeve rude – boksita. V magistrskem delu smo raziskovali možnost ekstrakcije slabo magnetnega hematita z visoko gradientno magnetno separacijo (HGMS) in možnost ekstrakcije težkih mineralov (hematit, rutil in cirkonij) z gravitacijsko separacijo (EMGS) iz rdečega mulja. Omenjene metode separacij so bile prvič uporabljene na rdečem mulju. Preiskovani material smo vzorčili z odlagališča rdečega mulja Birač, tovarne glinice Alumina d. o. o. Zvornik v Bosni in Hercegovini. Cilj testiranja je bil določiti primerne postopke za proizvodnjo predkoncentratov mikroelementov, kot so skandij, itrij, lantan, galij in elementov redkih zemelj v hematitu za njihovo nadaljnjo hidrometalurško ekstrakcijo ter za proizvodnjo koncentratov težkih titanovih mineralov (rutil) in cirkonija iz nemagnetne frakcije rdečega mulja. Na podlagi laserskega analizatorja smo ugotovili, da je velikost zrn povprečne frakcije rdečega mulja približno 1,9 µm. Na podlagi rezultatov analize XRF smo ugotovili, da je bila gravitacijska separacija najbolj uspešna na frakciji 25–45 µm za hematit in cirkonij pri specifični gostoti materiala ? = 1,03 g/cm3. Za titanove minerale gravitacijska separacija ni bila uspešna. Magnetna separacija je bila najuspešnejša na frakciji 25–45 µm za hematit pri gostoti magnetnega polja ? = 3,6 kG. Prvič je bilo dokazano z uporabljenimi metodami magnetne separacije in koncentracije slabo magnetnega hematita v začetni fazi ter končne gravitacijske separacije titanovih mineralov in cirkonija iz nemagnetne frakcije rdečega mulja, da rdeči mulj kaže dober potencial za nadaljnjo dobičkonosno industrijsko proizvodnjo titanovih mineralov in cirkonija. V naslednjih načrtovanih fazah nameravamo izvesti možnost pridobivanja elementov v sledovih (Sc, Y in REE), ki so vezani na koncentrat slabo magnetnega hematita s kemično ekstrakcijo. Red mud is produced as a by-product during the hydrometallurgical production of alumina (Al2O3) from aluminum ore – bauxite. In master's thesis were investigated the possibility of extracting weakly magnetic hematite with High Gradient Magnetic Separation (HGMS) and the possibility of extracting heavy minerals (hematite, rutile, zirconium) by Enhanced Multi Gravity Separator (EMGS). The above-mentioned separation methods were applied for the first time on red mud. The investigated material was taken from the Birač red mud landfill, alumina factory Alumina d. o. o. Zvornik, Bosnia and Herzegovina. The aim of the testing was to define suitable production conditions for the production of pre-concentrates of trace elements Sc, Y, La, Ga, REE in hematite for their further hydrometallurgical extraction, as well as for the production of concentrates of heavy titanium minerals (rutile) and zirconium from the non-magnetic fraction of red mud. Based on the laser analyzer, it was determined that the average fraction of red mud is about 10 μm. Based on the results of XRF analysis, it was determined that gravity separation was most successful on the 25–45 µm fraction for hematite and for zirconium at a specific material density of ρ = 1.03. The gravity separation for rutile was not successful on all mentioned fractions. Magnetic separation was most successful on the 25–45 µm fraction for hematite at the magnetic field density ρ = 3,6 kG. It has been proven for the first time that with the used methods of magnetic separation and concentration of weakly magnetic hematite in the initial phase and the final gravitational separation of titanium minerals and zirconium from the non-magnetic fraction of red mud, that red mud shows good potential for further profitable industrial production of titanium minerals and zirconium. In the next planned phases, we plan to the possibility of testing trace elements (Sc, Y and REE) bound to weakly magnetic hematite concentrate by chemical extraction. boksiti rdeči mulj HGMS EMGS težki minerali bauxites red mud HGMS EMGS heavy minerals true false false A. Mujanović Slovenski jezik Angleški jezik Magistrsko delo/naloga 2024-06-28 09:00:07 2024-06-28 09:00:15 2024-07-08 12:20:07 0000-00-00 00:00:00 2024 0 Ljubljana 0 Ljubljana XIV, 52 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 55 98357 201028099 20667.pdf 20667.pdf 1 9C8AEC833FC531A0ED2DECB6D2A3BE76 48c6d32628334412119bc99731924dd1ef871f1c7cf96f0c6bed1fc4aea4e6c3 1302cf2b-351c-11ef-8882-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186797 20668.pdf 20668.pdf 1 335E2B8CFCD8E86940D2A2E05E64B6DB b983703f301275a45ce7331a7f7f321baaa2e5b42a86d9306f1db2a6e951d5cc 1303ad2f-351c-11ef-8882-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186798 Naravoslovnotehniška fakulteta 0 0 0