20.500.12556/RUL-186744 Izolacija in karakterizacija magnezijevih produktov, pridobljenih iz slovenskih dolomitov Isolation and characterization of magnesium products obtained from slovenian dolomites Magnezij je ena najpomembnejših surovin v mnogih industrijah. Trenutno je pridobivanje magnezija energijsko potratno in okolju škodljivo, za povrh pa v Evropi ni dovolj razširjeno. Zato se aktivno razvija nove načine pridobivanja. Eden najpogostejših virov magnezija je dolomit, ki pa je razširjen tudi v Sloveniji. V tej diplomski nalogi sem skušal izboljšati ločbo magnezija od kalcija iz dolomita. Najprej sem dolomitu z mikrovalovnim razklopom in analizo z ICP-OES določil sestavo. Nato sem dolomit žgal v žarilni peči. Za natančno določitev poteka razgradnje dolomita pa smo kasneje izvedli še termogravimetrično analizo. Glavni del diplome je bilo selektivno raztapljanje in obarjanje z uporabo kompleksantov. Izkoristki magnezija in molsko razmerje Mg/Ca so bili pri ponavljanju postopka nižji kot v postopku, iz katerega sem izhajal. Pri uporabi kompleksantov so izkoristki ostali nizki, molsko razmerje pa se je konkretno izboljšalo. Na koncu sem še karakteriziral površinsko strukturo in elementarno sestavo dolomita in produktov postopka s SEM in EDS. Magnesium is one of the most important resources in many industries. Its production is currently energy-intensive, harmful to the environment and underdeveloped in Europe. Therefore, new production methods are actively being developed. One of the most common sources of magnesium is dolomite, which is also abundant in Slovenia. The aim of this bachelor’s thesis was to improve the separation of magnesium from calcium in dolomite. Firstly, the chemical composition of dolomite was determined using microwave digestion followed by ICP-OES analysis. The dolomite was then calcined in a muffle furnace. To accurately determine the thermal decomposition behaviour of dolomite, thermogravimetric analysis was performed. The main part of the thesis was the selective leaching and precipitation with the help of complexing agents. The magnesium recovery and molar ratio Mg/Ca attained by repeating the original process were lower compared to the ones in the original process on which my work was based on. With the use of complexing agents magnesium recovery stayed low, but the molar ratio was improved significantly. Finally, the surface morphology and elemental composition of dolomite and the obtained products were characterised using SEM and EDS. magnezij dolomit raztapljanje obarjanje karakterizacija magnesium dolomite leaching precipitation characterisation true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-04 13:05:02 2026-09-04 13:05:10 2026-09-06 03:39:25 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 26176 Zorman_Urban_-_Izolacija_in_karakterizacija_magnezijevih_produktov,_pridobljenih_iz_slovenskih_d.pdf Zorman_Urban_-_Izolacija_in_karakterizacija_magnezijevih_produktov,_pridobljenih_iz_slovenskih_d.pdf 1 E5419591150E192FB44F4940E6C05523 c21c7eacfdf157dd5d0070a214e6e6256fe2aec60dfbede891d43bda8af9fa7b 7e3f5196-a850-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=246102 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0