Its levels range from 1 part per million to more than 100 parts per million. Typically, silica exists in two forms in the water supply: (1) reactive silica; and (2) colloidal silica. Silica causes etching, scratching, and spotting on glassware and other fixtures. Removal of silica is usually done as a means of preventing wear and damage to ...
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The purpose of the present work is the development of a new industrial process for silica sand for the removal of these impurities and the production of materials suitable for a wide range of ...
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The goal of this research was to remove iron oxide from Ibute-Nze kaolin by dissolving the clay mineral in an aqueous oxalic acid solution and optimizing the process.
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The Modeling and Optimization of Iron Removal from Silica Sand Under Ultrasound‑Assisted Leaching by Response Surface Methodology Volkan Arslan1 Received: 24 March 2021 / Accepted: 28 June 2021
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Acid leaching was used to remove the iron in the quartz matrix. Under optimized conditions, the iron content can be reduced to below 0.167 ppmw with one single purification pass. ... Improvement of iron removal from silica sand using ultrasound-assisted oxalic acid. Fei-hu Du Jing-sheng Li Xiaoxia Li Zhizhen Zhang. Chemistry, …
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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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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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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 …
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There is no shortage of high-grade silica sand deposits in Saudi Arabia, but they are located about 1000 km from Jeddah industrial city. Therefore, the transportation cost becomes formidable. There are several low-grade silica sand deposits near Jeddah, but they require upgrading to provide raw material acceptable for the glass industry. This …
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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 solvents …
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Recently, improvements were made in the linings to prolong service life and increase productivity. As an aside, in this company as in many others, whenever experienced personnel are lost from retirement etc., Jet Pulverizer engineers are there to train new people and solve milling problems to maintain continuity. Biological Laboratory
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Kinetics of iron removal from quartz under the ultrasound-assisted leaching was explored in this paper, and the effects of temperature, leaching time, stirring speed and ultrasonic input power on ...
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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 iron-rich coating on a particle surface of silica sand with 0.18% Fe 2 O 3 was reduced to 0.11% with powerful ultrasonic an experiment set-up from our …
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This paper deals with the removal of iron from silica sand in aqueous oxalic acid, in the absence and pres- ence of ultrasound. The parameters investigated were the reaction temperature, stirring ...
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Improvement of iron removal from silica sand using ultrasound-assisted oxalic acid. Fei-hu Du Jing-sheng Li Xiaoxia Li Zhizhen Zhang. Chemistry, Environmental Science. Ultrasonics sonochemistry. 2011; 91. Save. Biohydrometallurgy for Nonsulfidic Minerals—A Review. N. Jain D. K. Sharma.
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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.
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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 Ultraviolet-Visible …
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The leaching of silica sand nanoparticles with a mixture of HCl and CH COOH further improved the weight percentage (wt.%) purity of silica 3 in Thal silica sand up to 96.60 wt.%. The beneficiated Thal silica sand nanoparticles were then reduced with Magnesium to o produce silicon particles at 900 C with and without the presence of argon atmosphere.
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Phosphoric acid (H 3 PO 4) was firstly used to remove iron impurities at very low concentrations from quartz sand under ultrasound irradiation with higher efficiency, simpler technology and is less harmful to the target product compared with the other comparable methods that use industrial strong acids such as sulfuric (H 2 SO 4), …
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A study of silica and iron recovery from the iron ore concentration tailing is presented. The residue is composed of 40.1% Fe, 33.4% SiO2, 8.31% Al2O3, 0.08% P, and 0.34% MnO. The developed process …
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Two different additive levels, high and low for each type, were selected. Two sands were selected, both round grain high purity silica with AFS GFN of 51 and 34. The additives tested included: Sand additive SX, a synthetic ESA consisting primarily of iron oxide but with a grain size similar to sand and a rounded particle shape.
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This work reports the use of ultrasound-assisted oxalic acid leaching for removal of iron and its comparison with the conventional magnetic stirring method. …
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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 …
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The project scale of production is 100000 tons a year high purity quartz sand. After crushing, the quartz sand enters into the rod mill for grinding, ground to a appropriate particle size, then the fine sand enters high gradient magnetic separator and plate type magnetic separator for iron removal, then goes to the classifying for obtaining sand …
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Now some small-scale production and processing companies use this method to remove more iron because it is cheaper and easier to operate, but the iron removal rate is relatively low. 2. Magnetic separation to remove iron from silica sand. Magnetic separation is divided into a dry selection and wet selection.
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This study presents a novel chemical process for the extraction of high purity silica from diatomite.The process involves leaching of raw diatomite with acid prior to alkali extraction, solubilization of treated diatomite with alkali solution to form sodium silicate solution, and precipitation of silica gel by adding sulfuric acid.Besides, the process …
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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 effect of reaction time and sulfuric acid concentration on the leaching process was investigated.
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for the removal of iron and other major impurities from silica sand. Mal!netic seoaration: Dry magnetic separation tests were carried out on particle size fractions +0.3 mm. For the fractions +4. ...
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DOI: 10.1016/J.MINPRO.2012.09.001 Corpus ID: 95362913; High efficiency iron removal from quartz sand using phosphoric acid @article{Zhang2012HighEI, title={High efficiency iron removal from quartz sand using phosphoric acid}, author={Zhizhen Zhang and Jing-sheng Li and Xiaoxia Li and …
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This study investigated the use of ultrasound to improve the removal of iron from silica sand using oxalic acid leaching. The researchers optimized various process parameters including reaction temperature, stirring speed, ultrasound power, acid concentration, and reaction time. Under the optimum conditions of 95°C temperature, 500 rpm stirring …
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