Iron removal process for high-purity silica production by leaching and magnetic separation technique
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- Category: Solid-state physics, mineral processing
- Last Updated on 04 February 2016
- Published on 04 February 2016
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Authors:
S. Bouabdallah, Badji Mokhtar University (UBMA), Annaba, Algeria.
M. Bounouala, Professor, Badji Mokhtar University (UBMA), Annaba, Algeria.
A. Idres, Dr. Sci. (Tech.), Badji Mokhtar University (UBMA), Annaba, Algeria.
A. Chaib, Badji Mokhtar University (UBMA), Annaba, Algeria.
Abstract:
Purpose. The preliminary study of El-Aouana (Algeria) sandstone quality improvement aimed to obtain high-purity silica sands without iron oxides to meet the standards of glass manufacturing.
Methodology. The sandstone from El-Aouana deposit was crushed and sieved. The mineral was characterized by X-ray diffraction and chemically analyzed by X-ray fluorescence, and atomic absorption spectrophotometry. The material
(-250+125 µm) was leached with hydrochloric acid. The study of main parameters of the leaching process in different ranges was realized. Thus, magnetic separation by means of the dry high-intensity magnetic separator was employed.
Findings. The leaching allows us to reduce the iron content in quartz sand significantly, while wet sieving removes only the fraction of these contaminating minerals (<125 µm). The applicability of magnetic separation requires further study and substantiation.
Originality. The originality consists in the utilization of hydrochloric acid as the leaching agent. Various preliminary experiments were conducted to determine the conditions of the main experiment.
Practical value. The results obtained by leaching method can satisfy the specifications for glass manufacturing. The sandstone enrichment by magnetic separation is practical and simple at minimum cost, but it is not effective for impurities removal.
References:
1. Asmatulu, R. (2002), “Enhancement of the dewetability characteristics of fine silica particles”, Eng. Env. Sci, no.26, pp. 513−519.
2. Banza, A.N., Quindt, J. and Gock, E. (2006), “Improvement of the quartz sand processing at Hohenbocka”, Institute of Mineral Processing, no.79, pp. 76−82.
3. Ibrahim, S.S. Selim, A.Q. and Hagrass, A.A. (2013), “Gravity Separation of Silica Sands for Value Addition”, Particulate Science and Technology, no. 31, pp. 590–595.
4. Deniz, A.F., Abakay, T.H. and Bozkurt, V. (2011), “Removal of impurities from tailing (quartz) obtained from bitlis kyanite ore by flotation method”, International Journal of Applied Science and Technology, no.1, pp. 74−81.
5. Hacifazlioglu, H. (2014), “Enrichment of silica sand ore by cyclojet flotation cell”, Separation Science and Technology, no. 49, pp. 1623−1632.
6. Zhang, Z. Li, J. Li, X. Huang, H. Zhou, L. and Xiong ,T. (2012), “High efficiency iron removal from quartz sand using phosphoric acid”, International Journal of Mineral Processing, no.114, pp. 30−34.
7. Styriakova, I., Mockovciakova, A., Styriak, I., Kraus, I., Uhlik, P., Madejova, J. and Orolinova, Z. (2012), “Bioleaching of clays and iron oxide coatings from quartz sands”, Applied Clay Science, no. 61, pp. 1−7.
8. Al-Maghrabi, M.N.H. (2004), “Improvement of low-grade silica sand deposits in Jeddah area”, Engineering Science, no. 15, pp. 113−128.
9. Tuncuk, A. and Akcil, A. (2014), “Removal of iron from quartz ore using different acids: a laboratory-scale reactor study”, Mineral Processing & Extractive Metall. Rev, no.35, pp. 217−228.
10. Kheloufi, A., Fathi, M., Rahab, H., Kefaifi, A. Keffous, A. and Medjahed, S.A. (2013), “Characterization and quartz enrichment of the Hoggar deposit intended for the electrometallurgy”, Chemical Engineering Transactions, no.32, pp. 889−894.
11. Sundararajan, M. Ramaswamy, S. and Raghavan, P. (2009), “Evaluation for the beneficiability of white silica sands from the overburden of lignite mine situated in rajpardi district of Gujarat”, Journal of Minerals & Materials Characterization & Engineering, no. 9, pp. 701−713.
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