Intensification of Sulfuric Acid Leaching of Altered Ilmenite via Adding Fluoride Activator
A new method of altered ilmenite processing has been studied. In this method, sulfuric acid is used as the reaction medium of the process, and fluoride ions are activators of the dissolving process of the rutile part of the ore raw material. The regression model of the sulfate–fluoride leaching proc...
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MDPI AG
2021
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oai:doaj.org-article:bec92157917b4f46990c76f3776ad1f42021-11-25T18:50:27ZIntensification of Sulfuric Acid Leaching of Altered Ilmenite via Adding Fluoride Activator10.3390/pr91119222227-9717https://doaj.org/article/bec92157917b4f46990c76f3776ad1f42021-10-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/1922https://doaj.org/toc/2227-9717A new method of altered ilmenite processing has been studied. In this method, sulfuric acid is used as the reaction medium of the process, and fluoride ions are activators of the dissolving process of the rutile part of the ore raw material. The regression model of the sulfate–fluoride leaching process was developed and analyzed by using the response surface method of 2<sup>3</sup> matrix. The obtained model is adequate and well describes the studied process. The influence of Ti:F molar ratio, temperature, and sulfuric acid concentration on the leaching process are investigated in this work in order to optimize the studied process. It is experimentally proved that leaching at temperatures above 100 °C, at a molar ratio of Ti:F of more than 1:2, and the use of solutions of sulfuric acid with concentrations of more than 85 wt.% is not optimal because the extraction degree of titanium is reduced. The intensification of the process of sulfuric acid leaching by dividing the main stage of chemical dissolution of ilmenite into two stages was proposed. This method allows to leach up to 95.9% of titanium, which is 1.6–1.9 times higher in comparison with the classical technology of leaching altered ilmenite.Anastasiia V. DubenkoMykola V. NikolenkoOleksandr O. PasenkoAndrii KostyniukBlaž LikozarMDPI AGarticlesulfuric acid–fluoride leachingaltered ilmeniterutileresponse surface methodchemical kineticsChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 1922, p 1922 (2021) |
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DOAJ |
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DOAJ |
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EN |
| topic |
sulfuric acid–fluoride leaching altered ilmenite rutile response surface method chemical kinetics Chemical technology TP1-1185 Chemistry QD1-999 |
| spellingShingle |
sulfuric acid–fluoride leaching altered ilmenite rutile response surface method chemical kinetics Chemical technology TP1-1185 Chemistry QD1-999 Anastasiia V. Dubenko Mykola V. Nikolenko Oleksandr O. Pasenko Andrii Kostyniuk Blaž Likozar Intensification of Sulfuric Acid Leaching of Altered Ilmenite via Adding Fluoride Activator |
| description |
A new method of altered ilmenite processing has been studied. In this method, sulfuric acid is used as the reaction medium of the process, and fluoride ions are activators of the dissolving process of the rutile part of the ore raw material. The regression model of the sulfate–fluoride leaching process was developed and analyzed by using the response surface method of 2<sup>3</sup> matrix. The obtained model is adequate and well describes the studied process. The influence of Ti:F molar ratio, temperature, and sulfuric acid concentration on the leaching process are investigated in this work in order to optimize the studied process. It is experimentally proved that leaching at temperatures above 100 °C, at a molar ratio of Ti:F of more than 1:2, and the use of solutions of sulfuric acid with concentrations of more than 85 wt.% is not optimal because the extraction degree of titanium is reduced. The intensification of the process of sulfuric acid leaching by dividing the main stage of chemical dissolution of ilmenite into two stages was proposed. This method allows to leach up to 95.9% of titanium, which is 1.6–1.9 times higher in comparison with the classical technology of leaching altered ilmenite. |
| format |
article |
| author |
Anastasiia V. Dubenko Mykola V. Nikolenko Oleksandr O. Pasenko Andrii Kostyniuk Blaž Likozar |
| author_facet |
Anastasiia V. Dubenko Mykola V. Nikolenko Oleksandr O. Pasenko Andrii Kostyniuk Blaž Likozar |
| author_sort |
Anastasiia V. Dubenko |
| title |
Intensification of Sulfuric Acid Leaching of Altered Ilmenite via Adding Fluoride Activator |
| title_short |
Intensification of Sulfuric Acid Leaching of Altered Ilmenite via Adding Fluoride Activator |
| title_full |
Intensification of Sulfuric Acid Leaching of Altered Ilmenite via Adding Fluoride Activator |
| title_fullStr |
Intensification of Sulfuric Acid Leaching of Altered Ilmenite via Adding Fluoride Activator |
| title_full_unstemmed |
Intensification of Sulfuric Acid Leaching of Altered Ilmenite via Adding Fluoride Activator |
| title_sort |
intensification of sulfuric acid leaching of altered ilmenite via adding fluoride activator |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/bec92157917b4f46990c76f3776ad1f4 |
| work_keys_str_mv |
AT anastasiiavdubenko intensificationofsulfuricacidleachingofalteredilmeniteviaaddingfluorideactivator AT mykolavnikolenko intensificationofsulfuricacidleachingofalteredilmeniteviaaddingfluorideactivator AT oleksandropasenko intensificationofsulfuricacidleachingofalteredilmeniteviaaddingfluorideactivator AT andriikostyniuk intensificationofsulfuricacidleachingofalteredilmeniteviaaddingfluorideactivator AT blazlikozar intensificationofsulfuricacidleachingofalteredilmeniteviaaddingfluorideactivator |
| _version_ |
1718410673437802496 |