Chloride Leaching of Titanium Ore from Reservoir in the North Area for Poduction of TiO2

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Rouhparvar, Navid | 2017

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 49563 (07)
University: Sharif University of Technology
Department: Materials Science and Engineering
Advisor(s): Yoozbashizadeh, Hossein
Abstract:
Titanium dioxide is one of the most important first material in many industrial applications and for producing Titanium.Although it was discovered more than 200 years ago and has been commercially processed for 85 years, it is still being actively investigated. So far Iran imports TiO2. But some projects have been planned to produce pure TiO2 from Ilmenite and Titanomagnetite ore. In the present work production of highly purity TiO2 from Ilmenite ore by chloride leaching has been investigated. Chloride leaching has been accomplished by several stages of leaching in hydrochloric acid, reduction, crystallization, hydrolysis and finally calcination of the powder. According to the result leaching efficiency was obtained under condition of 80 , acid concentration of 7 Molar, S/L ratio 1:10 in 5 hours. In reduction stage metallic iron powder added to 80 solution. After crystallization FeCl2 crystals were removed. In hydrolysis stage at 45 , at pH 1 and after 6 hours titanium oxy hydrate powders were formed. Then the powder is washed. Finally TiO2 powder with high purity was obtained by calcination at 1000 for 90 minutes, the purity of final powder is 91.6%.
Keywords:
Ilmenite ; Titanium Dioxide ; Chloride Leaching ; Purification ; Titanumagnetite

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