Application of Taguchi method for optimization of synthetic rutile nano powder preparation from ilmenite concentrate

► The Taguchi method was applied to optimize used technique. ► The nanosized synthetic rutile with photocatalytic activity was prepared from ilmenite concentrate. ► The synthetic rutile nanopowder contains TiO2, Fe2O3 and SiO2 as major compounds and trace amounts of impurities such as CaO, MgO, and...

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Published in:Chemical engineering research & design 2012-02, Vol.90 (2), p.220-228
Main Authors: Akhgar, B.N., Pazouki, M., Ranjbar, M., Hosseinnia, A., Salarian, R.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Crystallization, leaching, miscellaneous separations
Exact sciences and technology
Ilmenite
Iron
Mass ratios
Mechanical activation
Nanocomposites
Nanomaterials
Nanostructure
Optimization
Reductive leaching
Rutile
Synthetic rutile
Taguchi method
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Summary:► The Taguchi method was applied to optimize used technique. ► The nanosized synthetic rutile with photocatalytic activity was prepared from ilmenite concentrate. ► The synthetic rutile nanopowder contains TiO2, Fe2O3 and SiO2 as major compounds and trace amounts of impurities such as CaO, MgO, and Al2O3. In the present research work Taguchi method was applied to investigate the effect of reductive leaching parameters and mechanical pretreatment of ilmenite on nano synthetic rutile synthesis. The parameters such as ilmenite to acid mass ratio, ilmenite to iron powder mass ratio, milling time and initial leaching temperature were selected for optimization of experimental conditions. Consequently, the milling time was the most effective parameter on synthetic rutile preparation compared to the rest of the selected parameters. The optimum conditions obtained were as follows: milling in Argon atmosphere 40min, initial reaction temperature 100°C, ilmenite to hydrochloric acid mass ratio 1:9.55 and ilmenite to iron powder mass ratio 1:0.075. The characterization of products indicated that the prepared powder with milling time 40min, temperature 100°C, ilmenite to hydrochloric acid mass ratio 1:12.8 and ilmenite to iron powder mass ratio 1:0.05 had particles size of less than 100nm. The analysis further confirmed that synthetic rutile nano powder had 91.1% TiO2. The nano powder obtained under the optimized condition had a BET surface area of 54.6m2/g.
ISSN:0263-8762
DOI:10.1016/j.cherd.2011.07.008