Valorizacija titanijuma iz ostataka boksita redukcijom vodonikom i hidrometalurškom metodom
Apstrakt projekta
The development of eco-efficient metallurgical processes for the recovery of titanium from bauxite residues (BR) and minimization of deposited BR in Germany and West Balkan Countries (WBC) is an ambitious goal of this project proposal. Phase evolution of BR with hydrogen processing with high reduction efficiency and mechanism of iron recovery in the absence of slag formation below 1000°C will be studied. The formed iron will be separated during magnetic separation. Distribution of titanium and iron during the reduction and leaching process with the aim of maximum extraction efficiency will be discussed. Especially, hydrogen reduction of BR from the Bayer Process will be investigated as first step in production of metallurgical solid residue needed for the recovery of valuable metals such as titanium and iron. The leaching process will be performed using sulfuric acid and hydrochloric acid under atmospheric and high pressure conditions with a subsequent purification of solution through precipitation. Titanium oxide powders will be prepared using ultrasonic spray pyrolysis and hydrogen reduction from a cleaned solution. The obtained powders will be characterized by SEM; EDS and XRD analysis. The solid residue after valorisation of titanium can be used for the extraction of other critical metals such as rare earth elements and gallium.