20.500.12556/DKUM-76760 Razkroj blata iz raztopine po razklopu ilmenita/žlindre v laboratorijski mikrovalovni pečici. magistrsko delo Digestion of sludge from solution after digestion of ilmenite/slag in a laboratory microwave V sklopu magistrske naloge smo analizirali vsebnost TiO2 (%) v blatu iz raztopine po razkroju ilmenita in žlindre v vzorcih iz proizvodnje pigmentnega titanovega(IV) oksida v Cinkarni Celje d.d. Različne vzorce blat smo za potrebe določitve vsebnosti TiO2 v blatu razkrajali v odprtem sistemu (digestorij – klasična metoda) ter v zaprtem sistemu v mikrovalovni pečici (nova metoda). Zaradi dolgotrajnega postopka razkroja blata v digestoriju in škodljivega vpliva na zdravje zaposlenih in okolje smo razvili metodo določevanja vsebnosti TiO2 (%) v mikrovalovnem sistemu, ki je prijaznejša do zdravja zaposlenih ter okolja hkrati pa sprosti čas zaposlenih za opravljanje drugih meritev. Pripravili smo si prežarjeno blato iz raztopine po razkroju ilmenita oz. žlindre. Sledila je določitev vsebnosti TiO2 v blatu v odprtem sistemu, ki se trenutno uporablja za izvajanje meritev v proizvodnji pigmentnega titanovega dioksida. V naslednjem koraku pa smo izvedli razkroje blata v mikrovalovni pečici (zaprt sistem). Določili smo pogoje razkroja v mikrovalovni pečici: temperatura razkroja, čas razkroja, masa prežarjenega blata pri razkroju ter količina žveplove(VI) kisline. S statistično obdelavo rezultatov meritev smo ugotovili, da so rezultati vsebnosti TiO2 (%) v blatu določeni z razkrojem v mikrovalovni pečici primerljivi s tistimi, ki smo jih določili po klasičnem, to je odprtem sistemu razkroja. Metodo razkroja blata v odprtem sistemu, kjer se sprošča velika količina razkrojnih plinov, ki so škodljivi za zaposlene in okolje, lahko zamenjamo z novo metodo razkroja v zaprtem sistemu. V mikrovalovni pečici ostajajo razkrojni plini v vialah, se kondenzirajo in ne izhajajo v okolje, kar zmanjša negativne vplive na zdravje zaposlenih ter okolje. During the course of the master's thesis, the content of TiO2 (%) in the sludge from the solution after the decomposition of ilmenite and slag in the samples from the production of pigment titanium (IV) oxide in Cinkarna Celje d.d. has been analysed. For the purpose of determining the content of TiO2 in the sludge, various samples of sludge were decomposed in an open system (digester - classical method) and in a closed system represented by microwave oven (new method). Due to the long process of sludge decomposition by the classical method and the detrimental effect on employees’ health and the environment, a new method for determining the TiO2 content in the microwave system, which is friendlier to employees’ health and the environment has been developed. Overheated sludge from the solution after the decomposition of ilmenite or slag has been prepared. This was followed by the determination of the TiO2 content in the sludge in the open system, which is currently used to perform measurements in the production of pigmented titanium dioxide. In the next step, the decomposition of the sludge in the microwave (closed system) was performed. The following decomposition parameters using the microwave oven were determined: decomposition temperature, decomposition time, mass of overheated sludge during decomposition and the amount of sulfuric (VI) acid. Statistical processing of the measurements revealed that the TiO2 content (%) in the sludge, determined by decomposition in the microwave oven is comparable to the one determined by the classical (open decomposition) system. Sludge decomposition in an open system results in the release of large amounts of decomposition gases, which have adverse effects on employees and the environment. Results have shown, that the method can be replaced by a new method of decomposition in a closed system. In the microwave oven decomposition gases remain in the vials, they condense and do not escape into the environment, which reduces the negative effects on employees’ health and the environment. Titanov(IV) oksid žveplova(VI) kislina razkroj mikrovalovni sistem ilmenitno blato in žlinderno blato. Titanium dioxide sulphuric acid decomposition microwave system ilmenite sludge and slag. true true false [T. Zupanc] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2020-07-01 22:20:26 2020-07-30 14:34:09 2022-08-09 13:56:37 2020-08-08 03:10:16 2020 0 Maribor 0 Maribor X, 53 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 628.336.3/.5:549.514.6(043.2) 24523011 URN:SI:UM:DK:3VG1DUDM MAG_Zupanc_Tomaz_2020.pdf MAG_Zupanc_Tomaz_2020.pdf 1 816DB6E1800B564B98230FD238B217A0 21fd6995e0f042a1f2486ac6298385b2a3068515da8e7850e2a1fb4dbf24d135 682c2ac8-7c11-11eb-bb7a-00155d0001ca 20.500.12556/dkum/6e9fd0ce-5111-4d75-a11d-52f880aa3f28 https://dk.um.si/Dokument.php?lang=slv&id=143550 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0