Titanium Dioxide Recovery from Ilmenite Contained in Ferrotitaniferous Sands from Mompiche-Ecuador
Year: 2016
Type: article
Abstract: Titanium dioxide (TiO 2 ) was recovered from ilmenite (FeO•TiO 2 ) contained in ferrotitaniferous sands of Mompiche area, by the combination of the thermal treatments of oxidation and carbothermic reduction and the subsequent leaching with hydrochloric acid (HCl) of the thermally treated samples.This study was developed because of the large source of TiO 2 that Ecuador has, but has not developed enough research to place an industry to produce this compound.The oxidation at 900 °C for 3 h yielded a content of 11% of TiO 2 , and the highest oxidation of ilmenite (82%) was achieved at 1,000 °C for 1 h.The carbothermic reduction with 15wt% carbon at 950 °C for 2 h achieved a content of 6% TiO 2 and 21% ilmenite.The combination of thermal treatments did not increase the content of TiO 2 but allowed to obtain more soluble minerals in HCl.The best results of leaching were obtained with 100 mL of 256 g/L HCl for 6 h at 70 °C and 10% solids of the sample oxidized at 900 °C for 3 h and subsequently reduced with 15wt% carbon at 950 °C for 2 h.The optimum leaching time was 4 h, giving a TiO 2 of 90% purity with a recovery of 43%.
Authors: Daniel Trujillo, Lucía Manangón
Institution: National Polytechnic School
Language: English
Subfield: Metals and Alloys
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2524150577