The purpose of these experiments is to investigate the possibility to use power ultrasound to remove iron-rich coatings from the surfaces of silica sand for glass making. Experiments show that the ...
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This paper deals with the removal of iron from silica sand in aqueous oxalic acid, in the absence and presence of ultrasound. The parameters investigated were the reaction temperature, stirring speed, ultrasound power, acid concentration and reaction time. The optimum conditions for the maximum removal of 75.4% of iron with ultrasound were ...
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Iron is a major impurity in quartz sand and must be strictly removed in many applications. However, the iron removal rate in most of the conventional purification process is not high enough. In this study, a fast, low-energy consuming, environment-friendly and simple process for purifying quartz is demonstrated by a combination of …
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In conclusion, we have found the best conditions for the iron removal from the silica sand under ultrasound irradiation. The method induces a remarkable acceleration for the iron leaching process, the leach acid concentration reducing dramatically and the …
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OUR proven silica sand washing solutions ensures: Guaranteed precision and maximum process efficiency – the precision of the cut points and careful attention to all material transfer points maximizes retention of in spec material and water within the circuit and ensures maximum product yield.. Removal of iron oxide and other deleterious materials …
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Iron is a key detrimental impurity in silica sands that determines their contribution to high-technology industries. Herein, a simple ecologically sound approach is investigated for iron removal from a silica sand sample obtained from the El-Zaafarana area-Egypt. The sample was subjected to a detailed microscopic mineralogical study …
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Various organic [7, 8] and mineral [9][10][11] acids have been investigated for iron removal from silica sands. Among organic acids, oxalic acid is found to be the most promising because of its ...
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Iron removal from Turkish quartz sand by chemical leaching and bioleaching. V. Arslan O. Bayat. Environmental Science, Materials Science. 2009. The primary advantage of using oxalic acid is in the formation during leaching of soluble complexes that are both photochemically and microbiologically degradable. In this study, chemical …
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The present work aims to study the removal of iron from silica sand with oxalic acid. Based on the above mechanistic observations, an attempt was made to optimise the process parameters and reach a high degree of iron removal at minimum operating cost. The parameters studied were: temperature, pH of the solution, oxalate concentration, Ar ...
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The Modeling and Optimization of Iron Removal from Silica Sand Under Ultrasound-Assisted Leaching by Response Surface Methodology. July 2021. Mining …
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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...
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Contrasting: 1, Mentioning: 27 - 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 …
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Composition: Silica sand is composed of at least 95% silicon dioxide (SiO2), whereas regular sand may contain varying amounts of different minerals, including quartz, feldspar, calcite, and others. Uses: Silica sand is primarily used in industrial and commercial applications, including foundry casting, glassmaking, and oil and gas …
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Shen and Peng (2008) studied the removal of iron impurities from Gaoping silica sand using 0.5 M H 2 SO 4 and leached for 96 h; 48.2% of iron impurities in the silica sand were removed from their experiments. Veglió et al. (1998) leached iron with H 2 SO 4 at 95 °C for 4.0–5.0 h, and obtained 3.0–9.0% iron removal. It is clear that though ...
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The present work aims to study the removal of iron from silica sand with oxalic acid. Based on the above mechanistic observations, an attempt was made to optimise the process parameters and reach ...
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The head sample shows a silica and iron oxide content of 95.69% and 2379 ppm, respectively. Attrition and separation over a 25 μm sieve increase the silica content to 97.05% and decreases the ...
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MIN Figure I. Iron extraction as a function of time and temperature for the silica sand sample SSL20 (pH I, cOX O.3M, pulp density 20%) 292 The dependence of the iron removal level on the leaching temperature could …
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This paper deals with the removal of iron from silica sand in aqueous oxalic acid, in the absence and presence of ultrasound. The parameters investigated were the reaction temperature, stirring ...
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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 …
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The removal of iron from silica sand with oxalic acid has been studied by several authors [ 22, 33, 34 ]. Iron removal takes place in a reducing mechanism with …
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The work on silica sand clearly demonstrates the benefits of sonication, in reducing the iron contamination due to surface coating of the silica grains. The reduction from 0.025 to 0.012% Fe 2 O 3 would make this sand suitable for the production of tableware glass. 2.
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The Modeling and Optimization of Iron Removal from Silica Sand Under Ultrasound-Assisted Leaching by Response Surface Methodology. 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.
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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.
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The optimum conditions for the maximum removal of 75.4% of iron with ultrasound were determined as follows: reaction temperature, 95 C; stir-ring speed, 500 rpm; ultrasound …
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The level of iron in silica sand determines its ultimate application in glass making. Iron levels range from 0.1% Fe 2 O 3 for the manufacture of amber and green glass, through 0.03% for clear glass and less than 0.015% for table ware. The sand studied had already been processed for the manufacture of container glass and flat glass and …
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The Modeling and Optimization of Iron Removal from Silica Sand Under Ultrasound-Assisted Leaching by Response Surface Methodology. 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.
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The removal of iron from silica sand using ultrasound and oxalic acid has been studied in [12]. The optimum conditions for the maximum removal of 75.4 % of iron with ultrasound were determined as ...
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Preparation and characterization of iron oxide coated sand. Prior to iron oxide coating, the substrate silica sand was wet-sieved over the #200 sieve (75 μm) to remove all fines, and then digested in H 2 O 2 (3% solution) to remove surface traces of organic matter. Iron oxide coatings onto sand were accomplished by co-adsorption …
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The bioleaching of iron oxides by Aspergillus niger resulted in removal of 47. 70% of the total iron in the quartz sand, and suggested that this strain has not a good ability to remove iron impurities from quartz sand in comparison with chemical leaching. The iron content decreased from 0.315% Fe 2 O 3 to 0.164% Fe 2 O 3 in the bioleached ...
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Arslan, V. The Modeling and Optimization of Iron Removal from Silica Sand Under Ultrasound-Assisted Leaching by Response Surface Methodology . Mining, …
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Using oxalic acid, the dissolved iron can be precipitated from the leach solution as iron(II) oxalate dihydrate, which can be represented a useful potential feedstock for added-value products [15], [16]. The removal of iron from silica sand with oxalic acid has been studied by several workers [2], [3], [4].
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The aim of our research is to improve low-grade silica from quartz sand by removing impurities, especially aluminum and iron removal, using sulfuric acid leaching. In order to achieve the aim, the ...
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Reverse Osmosis. If the silica is reactive silica, then Reverse Osmosis is the most practical method to remove it from the water supply. Reverse osmosis will reduce both colloidal and reactive silica, but proper pretreatment is necessary, including oxidation of iron, sulfur, and manganese, removal of chlorine, and chloramine, while hardness ...
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the removal of impurities from silica was examined. Alcohol cleaning was performed to obtain higher-purity silica. The purity of refined silica (RS) sands after purification is higher ... 3.2 Particle Size Distributions of Silica Sands Small amounts of iron and zircon exist in the quartz vein ore, and these compounds calcine into Fe 2O 3, ZrO
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Minimizing the iron oxide content in silica sand ores to add value has been the target of many researchers [10][11][12][13][14][15][16] [17] [18]. Ali et al. [19] and Boulos et al. [20] also ...
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