Removal of iron from silica sand by leaching with oxalic acid
The result suggests that much work still needs to be done for the improvement of leaching and extraction selectivity as well as efficiency, and also for the development of a green recovery process with environmental benignity, low energy requirements and cost. ... ELSEVIER Hydrometallurgy46 (1997) 215-227 Removal of iron from silica sand by ...
Improvement of iron removal from silica sand using …
Below pH 1.5, oxalic acid exists mainly as H 2 C 2 O 4, whereas HC 2 O 4 - is the most predominant species (mole fraction >0.92) at pH 2.5–3.0. Above pH 4, C 2 O 4 …
Improvement of iron removal from silica sand using …
DOI: 10.1016/j.ultsonch.2010.07.006 Corpus ID: 34847111; Improvement of iron removal from silica sand using ultrasound-assisted oxalic acid. …
High efficiency iron removal from quartz sand using phosphoric acid
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), …
High efficiency iron removal from quartz sand using …
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 …
Improvement of iron removal from silica sand using …
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 …
Removal of iron from silica sand by surface cleaning using …
DOI: 10.1016/J.MINENG.2006.10.005 Corpus ID: 98660649; Removal of iron from silica sand by surface cleaning using power ultrasound @article{Zhao2007RemovalOI, title={Removal of iron from silica sand by surface cleaning using power ultrasound}, author={Hongli Zhao and D. X. Wang and Y. X. Cai …
Improvement of Impurities Removal from Silica Sand …
The sand no untreated presents a peak at 2θ = 22.5°which corresponds to the compound of SiO2-x Alx (fig 1), Disappearance of the peak at 2θ = 22.5° in the case of leaching silica with HF(20%)
Kinetics Analysis and Effects of Various Factors on …
ICP-OES (Optima 2100 DV, PerkinElmer, USA).The iron removal efficiency of a process can be calculated using the equation: Iron removal efficiency (%) = (1− amount of iron …
Improvement of iron removal from silica sand using …
The maximum removal of 65.8% of iron is achieved with the solutions containing. 6 g/l of oxalic acid for 30 min under conventional stirring. How-ever, the same removal …
The Modeling and Optimization of Iron Removal from …
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
8 Methods for Removing Iron From Silica Sand | M&C
8 Methods for Removing Iron From Silica Sand 1. Water Washing for Iron Removal. Water washing for iron removal is the use of hydraulic flushing to remove iron impurities from silica sand. During the flushing process, by controlling the intensity and direction of water flow, iron impurities on the surface of silica sand particles are washed down, …
(PDF) Improvement of iron removal from silica sand using …
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 …
Removal of iron from silica sand by surface cleaning using …
Notes: (1) The Fe 2 O 3 % is the chemical analysis result from treated sample. (2) The data in bracket is the result of continuously replacing water. α – the iron content in sample; γ – the iron content after acid treatment, that is the limit value of iron elimination; β 1, β 2 – the iron contents after ultrasonic wash and mechanical scrubbing respectively; …
Improvement of iron removal from silica sand using …
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 …
The Modeling and Optimization of Iron Removal from Silica …
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 …
Implementation of Sulfuric Acid Leaching for …
The results of this research can be a very significant opportunity to increase the value added of quartz sand from Sukabumi, which can enhance the quality of lowgrade silica to provide better raw materials for glass …
Improvement of iron removal from silica sand using …
Improvement of iron removal from silica sand using ultrasound-assisted oxalic acid. Du F 1, Li J, Li X, Zhang Z. Author information. Affiliations. 1 author. 1. …
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 …
Implementation of Sulfuric Acid Leaching for Aluminum and Iron Removal
This work refers to the purification of silica from quartz sand originated from Sukabumi, Indonesia to obtain high-purity silica, which can be applied as important raw materials for special purposes. ... Ersan Yudhapratama, Implementation of Sulfuric Acid Leaching for Aluminum and Iron Removal for Improvement of Low-Grade Silica …
The Modeling and Optimization of Iron Removal from Silica Sand …
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 …
SURVEY OF QUARTZITE AND SILICA-SAND DEPOSITS IN THE SULTANATE OF OMAN
The document presents the status report on the preliminary site survey of silica sand and quartzite deposits in the Sultanate of Oman, which was made by Professor N. A. Iasamanov of the Moscow ...
Kinetics Analysis and Effects of Various Factors on …
Silicon (2017) 9:265–272 267 Fig. 2 Effect of reaction temperature on removal rate of iron under conventional stirring (a) and ultrasound-assisted leaching process (b) (hydrochloric acid concentration 12 wt%, stirring rate 300 rpm, particle size less than 250 μm, ultrasound power 180 W and frequency 45 kHz) percentage increased remarkably from 80.5 % to …
Removal of iron and other major impurities from silica sand for …
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 ...
(PDF) Improvement of impurities removal from silica sand …
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 …
Iron Removal Process for High-Purity Silica Sands …
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 …
Improvement of Impurities Removal from Silica Sand by …
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 …
Promising use of Omani silica sand in energy storage
"The silica sand in fthe Sultanate of Oman was found to be ultra-pure; a composition National Renewable Energy Laboratory (NREL) [part of the US Department of Energy] has proven to have ideal thermal properties for its use as a Thermal Energy Storage system. NREL has also proposed a standalone sand-TES concept, which offers …
(PDF) The Modeling and Optimization of Iron Removal from Silica Sand
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 ...
Silica Sand in Oman, Silica Sand Exporter, Silica Sand …
To keep the chemical properties of the Silica Sand intact, it is supplied in air tight packaging across the world. Features: Longer service life Free from impurities Pure composition Additional Information: Silica Sand (SiO2) is relatively pure form of common sand with lower Silica percentage compared to Quartz rock plus some impurities.