Glass sand processing by oxalic acid leaching and …
The process wash water contained 0.3-0.8 g/1 oxalate and 6-10 mg/1 of iron. Synthetic high-iron leachates, i.e., those simulating effluents from heap leaching of low grade (high-iron) silica sand, usually containing 100-400 mg/I iron, were prepared by dissolving hydrated iron oxide, ochre (FeA.xH20), in oxalic acid.
اقرأ أكثر
ACID LEACHING TECHNOLOGY FOR OBTAINING A HIGH-PURITY OF SILICA …
Improvement of Impurities Removal from Silica Sand Using a Leaching Process. A. Kheloufi Y. Berbar A. Kefaifi S. Medjahed F. Kerkar. ... The target of this study is the optimization of an industrial froth flotation process of silica sand to minimize the Fe2O3 and heavy minerals content. Multiple laboratory tests were made, following …
اقرأ أكثر
Improvement of Impurities Removal from Silica …
Algerian silica sand by means of sequential leaching process using several solvents like HF, HCl, H2SO4, NaOH. The stady …
اقرأ أكثر
Eco-friendly strategy for preparation of high-purity silica …
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 efficiency of Al, Ca, Fe, and Mg exceeded 97% for all cases, and the SiO 2 purity in high-purity silica reached 99.93%. Thus, this study proposes a new strategy ...
اقرأ أكثر
Removal of iron from silica sand by leaching with oxalic acid
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 minimum operating cost. The parameters studied were: temperature, pH of the solution, oxalate concentration, Ar purging, and ferrous ions …
اقرأ أكثر
Methods used in the beneficiation of silica sand and …
The advantages of ultrasound-assisted leaching were also confirmed by characterizing the silica sand and the leached solid samples using particle size, SEM and color measurement analysis. View ...
اقرأ أكثر
Characterization and Iron Removal Enhancement of El-Zaafarana White Sand
With no loss of silica sand upon leaching and the dissolution of silica-associated impurities, that exist in minor quantities, the recovery and yield of the whole process are mostly dependent on the attrition process. The final product exhibits a high silica content of 99.82% compared to 95.69% in the as-received sample.
اقرأ أكثر
Iron and Aluminium Removal from Algerian Silica Sand by Acid Leaching
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.
اقرأ أكثر
Improvement of iron removal from silica sand using ultrasound-assisted
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 …
اقرأ أكثر
Removal of iron from silica sand by leaching with oxalic acid
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.
اقرأ أكثر
Improvement of Impurities Removal from Silica Sand by …
Efficiency of the leaching process is improved and the removal of impurities is largely enhanced using a sequential leaching process with an appropriate solvent combination. …
اقرأ أكثر
Recovery and preparation of high-grade silica from iron
The SiO 2 purity of high-grade silica reached 99.51% after acid leaching process. ... Innovative technology for the production of high-purity sand silica by thermal treatment and acid leaching process. ... Optimisation of acid pre-treatment parameters in silica extraction process from cassava periderm. Materials Today: Proceedings, Volume …
اقرأ أكثر
Purification Mechanism of Quartz Sand by Combination of
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 …
اقرأ أكثر
Iron Removal Process for High-Purity Silica Sands Production …
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 …
اقرأ أكثر
Advanced Chemical leaching process of Wadi El Dakhal silica sand …
The sieving of washed silica sand sample were carried out to discard the fine contaminant size like clay and silt and upgrade the SiO 2 content to optimum level, before chemical leaching process. The weighting of silica sand samples before and after sieving was calculated and found the percentage of weight loss of sieve less than 200um size is ...
اقرأ أكثر
(PDF) Implementation of sulfuric acid leaching for
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 ...
اقرأ أكثر
Removal of iron from silica sand by leaching with oxalic acid
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 …
اقرأ أكثر
Removal of iron from silica sand by leaching …
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 applications. In this …
اقرأ أكثر
Iron and Aluminium Removal from Algerian Silica Sand by Acid Leaching
Sev eral methods to remove iron from the sand particles are used; in our work. we employ ed the acid leaching process as optimal solution to purify the silica sand. T o this purpose, our work ...
اقرأ أكثر
Silica Sand Etching Behavior During a Primary Step …
The most influencing parameters on silica leaching are leaching time and particles sand size. Our work consists of the study of etching behavior of silica with HF, since this acid can...
اقرأ أكثر
Improvement of Impurities Removal from Silica Sand Using a Leaching Process
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.
اقرأ أكثر
Innovative technology for the production of high-purity sand silica …
DOI: 10.1016/J.HYDROMET.2019.02.010 Corpus ID: 104332777; Innovative technology for the production of high-purity sand silica by thermal treatment and acid leaching process @article{Khalifa2019InnovativeTF, title={Innovative technology for the production of high-purity sand silica by thermal treatment and acid leaching process}, author={Marouan …
اقرأ أكثر
Improvement of iron removal from silica sand using …
Leaching. 1. Introduction. The presence of iron compounds in silica sand is prohibitive to the production of optical fibers, glass, ceramics and refractory materials. …
اقرأ أكثر
Reducing impurities of silica sand by one step and two step …
This study investigated purification process to increase the silica content of quartz sand using the one step leaching method using dilute hydrochloric acid and …
اقرأ أكثر
Silica Sand Etching Behavior During Leaching Process Using …
The aim of this study is to show how the design of experiments method (DOE) could be used as a practical method to model silica sand etching behavior during the leaching process. In the present work we have studied the etching effect on the …
اقرأ أكثر
Optimization of Quartz Sand Leaching Process Using …
The present study aims at investigating the Algerian quartz sand from Djelfa deposit as a potential source to produce silicon. The sand from the Djelfa deposit has a high concentration but not enough to be used as raw material for pyrometallurgy (97%) of SiO2. Therefore, the quartz was treated using acid leaching process to increase the …
اقرأ أكثر
Preparation of Nano Silica from Silica Sand Through Alkali Fusion Process
The recrystalizing process was conducted by water leaching and filtration. The derived nano particles (gel) ranged between 40-60 nm. ... October 2013 Preparing Nano Silica from Silica Sand Through Alkali Fusion Process, Agus Wahudi et. al Nano silica is applied widely in building material, METHODOLOGY notably as a mixture of concrete (Buitelaar ...
اقرأ أكثر
Innovative technology for the production of high-purity sand silica …
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 ...
اقرأ أكثر
Impurity removal process for high-purity silica production by acid leaching
The leaching process with HCl, (HCl & H 2 SO 4 ), (HCl, HF, HNO 3 ), [HCl, HF and (COOH) 2 ] acids were conducted to beneficiate the raw silica sand and achieve a very good results of SiO 2 .
اقرأ أكثر
Silica Sand Etching Behavior During a Primary Step of its …
The most influencing parameters on silica leaching are leaching time and particles sand size. Our work consists of the study of etching behavior of silica with HF, …
اقرأ أكثر