Leaching Process Of Silica Sand
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- Leaching Process Of Silica Sand
In the present work, an S-HGMS coupling acid leaching technology was established to prepare high-purity silica using vein quartz ore. Firstly, the magnetic properties of different phases in vein quartz were investigated through density functional theory (DFT) calculations and arranged the phases in terms of magnetic susceptibility: …
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:vii" . ELSEVIER Hydrometallurgy 46 (1997) 215-227 hydrometallurgy Removal of iron from silica sand by leaching with oxalic acid M. Taxiarchou, D. Panias, I. Douni, I. Paspaliaris, A. Kontopoulos * Laboratory of Metallurgy, National Technical UniversiO' of Athens P.O. Box 64056, GR 157-10 Zogrqfos, Greece Received 6 …
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During the leaching process, with the increase in the repeated leaching times, the removal efficiency of impurities ions in high-grade silica sand increased. This was attributed to the new acid source enhancing the mass transfer reaction ( Ajiboye et al., 2019 ; Shao et al., 2022 ).
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The method induces a remarkable acceleration for the iron leaching process, the leach acid concentration reducing dramatically and the removal efficiency increasing considerably when compared with conventional stirring method. Sonobleaching of silica sand may therefore be considered as a competing technology for industry. …
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Better results were obtained in this study with the sand of Maféré compared to the result obtained by Marouan Khalifa et al. (2019) in their process to produce high purity silica sand by heat ...
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Efficiency of the leaching process is improved and the removal of impurities is largely enhanced using a sequential leaching process with an appropriate solvent …
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Shown in Fig. 1 is the flow sheet of the complete purification procedure. At first, an acid leaching stage was used to remove small quantities of impurity minerals prior to silica extraction from diatomite. 10 g of raw diatomite sample were leached in 2.2 M HNO 3 acid solution at 60 °C for three-hours under constant stirring. HNO 3 quantity was …
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In this article, a leaching study, carried out on a quartz sample to obtain high-purity silica sands, has been presented. A leaching process by using oxalic acid to remove low iron content from the…
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Thus, we have studied etching effect on particle granulometric size during a primary step of leaching process on Algerian silica sand with HF at 20% during 2, 4 and 6 hours. Therefore, a new granulometric classification of the sand is noted. Particles with proportional high size are the latest influenced and the mass loss is increased with time ...
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In this study, three types of acid (sulfuric acid, citric acid, and oxalic acid) were considered to study the removal of impurities from silica rock via leaching …
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It was observed that the ball milling process not only reduced the particle size but also librated the silica particles from the impurities resulting in increased purity of silica in Thal silica sand from 86.60 wt. % to 95.52 wt. % as major impurities consisting of Al O and CaO, were liberated during grinding and 2 3 separated during sieve ...
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Subsequently, employing the "ultrasound-assisted fluorine-free acid leaching process," impurity elements were removed and high-purity silica was produced. Under optimal leaching conditions, the SiO 2 purity of silica sand increased to 97.42%. Following a three-stage acid leaching process with 4 mol/LHCl +2 mol/LH 2 C 2 O 4, the removal ...
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In the case of water-leaching pretreatment, leaching duration for 2.5 h could yield an amorphous silica with purity of 94% and render the silica amorphous at 900 °C for 7 h.
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In this article, a leaching study, carried out on a quartz sample to obtain high-purity silica sands, has been presented. A leaching process by using oxalic acid to remove low iron content from the ore under study and to obtain a material suitable for fiber optic production has been evaluated. A characterization study has been carried out to …
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The kinetics of leaching silica sand in hydrochloric acid solution under conventional stirring and ultrasound-assisted conditions was studied. Acid concentration, temperature, stirring speed, ultrasound frequency and particle size had significant effects on the leaching rate while the influence of ultrasound power was negligible. The leaching …
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In our days obtaining silica sand with very high purity is a primordial stage in photovoltaic industry. The effects of acids on the removal of impurity from silica sand have been studied using leaching acids: mixture composed of HF/HCl/H 2 O with a volume composition of (1:7:24).The obtained material was characterized using
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The silicon solar grade destined for the photovoltaic applications required a high purity (>99.9999%), its cycle of production consists firstly of enriching the silica by acid leaching. In the present work, we have tried to enhance the extraction rate of impurities from Algerian silica sand by means of sequential leaching process using several …
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Algerian silica sand by means of sequential leaching process using several solvents like HF, HCl, H2SO4, NaOH. The stady of leaching effect is followed by DRX and Backscattered Electron images ...
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This study aimed to remove the contaminants in quartz sand by using an eco-friendly method and to obtain high-purity quartz. For this purpose, ultrasound-assisted acid leaching was applied. Equal amounts of a mixture of diluted hydrochloric and oxalic acids were used as the solvent. Response surface methodology (RSM) was used for …
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The Cape Flattery silica sand project is an open-cut silica sand mining operation currently under development in Queensland, Australia. Metallica Minerals, an Australia-based company specialising in silica sand mining, is developing the project.
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In our days obtaining silica sand with very high purity is a primordial stage in photovoltaic industry. The effects of acids on the removal of impurity from silica sand have been studied using leaching acids: mixture composed …
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This study established a complete set of critical technologies for preparing high-purity silica from vein quartz through the S-HGMS coupling acid leaching …
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One more interesting feature has been agreed by several workers that the optimum pH for leaching of iron from silica sand is pH 2.5–3.0, outside which range the leaching rate drops dramatically. The phenomenon has been explained by Lee et al. [17], [18] that the solution pH governs the distribution of various oxalate ions in the leach …
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The removal of iron from silica sand with oxalic acid has been studied under various experimental conditions in order to optimise the process parameters and reach a high degree of iron removal at ...
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To enhance the recovery of silica, the removal of impurities from the silica rock was investigated. The leached specimens were characterized by wet method, …
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To obtain high-purity silica sands by using quartz vein ore from Dabie Mountain, Anhui province, China as raw material, this study investigated a quartz purification process that involves calcination, water quenching, flotation, acid leaching, and alcohol-deionised water cleaning procedures. The composition, particle size, phase, and …
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This research aims to contribute and increase the added value to the raw silica sand by chemical leaching process to produce high content of SiO 2 .The evaluation technique of studied silica sand ...
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Corpus ID: 102484117; Improvement of Impurities Removal from Silica Sand Using a Leaching Process @article{Kheloufi2011ImprovementOI, title={Improvement of Impurities Removal from Silica Sand Using a Leaching Process}, author={Abdelkrim Kheloufi and Yacine Berbar and Aissa Kefaifi and Sidali Medjahed and Fouad Kerkar}, …
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From the results of the X-Ray Fluorescent analysis it is seen that quartz sand from mining has a silica composition of 85.869% wt, water leaching results by the mining company 93.702% and sulfuric ...
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In the present work we have studied the etching effect on the particle granulometric size during a primary step of the leaching process on Algerian silica …
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