The Modeling and Optimization of Iron Removal from Silica …
Finally, optimization experiments were made and optimum experiment conditions were revised and determined as 83.38 °C of leaching temperature, 196.35 …
(PDF) Enrichment and extraction of lanthanum from Belitung silica sand …
The effect of sulfuric acid volume on heap leaching of lanthanum from Indonesian silica sand for (a) The volume of sulfuric acid at 250 mL showed the highest extraction ability, and (b) High ...
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, …
Preparation of high purity silica from silica rock by leaching …
A previous research verified that H 2 SO 4 acid was one of the best leaching agents to remove 97.96% iron and 94.23% aluminium from quartz sand, attributed to …
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 …
High efficiency iron removal from quartz sand using phosphoric acid
For example, Zhang (2001) reported that he removed 39% of iron impurities from the silica sand by 10% HCl at 80 °C for 8 h. Further, he removed iron impurities from the silica sand for 2 h, and obtained a leaching percentage of 75.6% by 1200 °C of hot pure HCl gas. Although the latter looked good, it consumed a lot of energy and caused …
An efficient method combining thermal annealing and acid leaching …
The silica used in this work is a natural one from the region of Siliana in Tunisia. Prior to thermal annealing, silica was dipped in an acid mixture solution, HCl:HNO 3 (AS1) with a volume proportion of 2:1 to remove metallic impurities located at the surface of silica grains. Then it was abundantly rinsed with deionized water and dried under …
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 …
Removal of iron from silica sand by surface cleaning using …
The data in hot acid treatment the column give the iron contents obtained from the samples which were soaked in 10% (mass percent) hydrochloric solution at 90 °C for 60 min and then washed clean with distilled water, which Conclusion (1) Improved iron elimination can be obtained on processing natural silica sand with the ultrasound …
Prepare and Mechanism of High Purity Quartz by Alkali
Prepare of high-purity quartz using vein quartz by alkali corrosion and acid leaching processes was investigated in this study. Using alkali corrosion method, the impurities on the surface of quartz particles can be removed and the cracks on the quartz surface can be deepened and enlarged, accompanied by the existence of corrosion pits, …
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 …
Glass sand processing by oxalic acid leaching and …
In order to purify silica sand and remove iron impurities, which often are in shape of staining and coloring on surface of silica particles, hot agitated acidic leaching (HAAL) using inorganic ...
Acid leaching of silica sand
If you have mainly iron and at low concentration (max. about 100 ppm), you may get away with an oxalic leaching as a first step - test and see. If you have higher iron, not to mention other deleterious elements (Ba, Mg, Al, Ca, Ti, Zr, etc.) you may want to consider hydrochloric acid leaching. Sulfuric acid will not dissolve barium.
Calcium removal from high pure silica sand by acid leaching ; …
Calcium removal from high pure silica sand by acid leaching ; acids affinity | Request PDF. Article. Calcium removal from high pure silica sand by acid leaching ; …
Innovative technology for the production of high-purity sand …
Innovative technology for the production of high-purity sand silica by thermal treatment and acid leaching process. February 2019. Hydrometallurgy 185. DOI: …
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 ...
Hot-acid leach
HAL [Hot acid leaching] A process for purifying silica sand or zircon by leaching out surface iron compounds with hot sulfuric acid. Derived from an earlier process, invented in 1955 by British Industrial Sand, in which silica sand was treated with hot, gaseous hydrogen chloride. The process for cleaning zircon sand was developed jointly by ...
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 …
Reducing impurities of silica sand by one step and two step leaching …
This study investigated purification process to increase the silica content of quartz sand using the one step leaching method using dilute hydrochloric acid and comparing to two step leaching using dilute hydrochloric acid and sodium bicarbonate as solvent. The effectiveness of the process of removing impurities from quartz sand was …
Bioleaching of Industrial Minerals
This process involves pre-heating the sand to 140 °C before it is mixed with sulphuric acid, contacted for an hour, then washed (Figure 2). Fig. 2 – Silica sand entering the hot acid leaching process. The resultant effluent from this process is neutralised with lime and the precipitate, calcium sulphate, is left to settle out in lagoons.
Silica Sand Etching Behavior During a Primary Step of its Leaching …
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 ...
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.
Enrichment and extraction of lanthanum from Belitung silica sand …
@article{Kusrini2020EnrichmentAE, title={Enrichment and extraction of lanthanum from Belitung silica sand using sulfuric acid heap leaching, precipitation and complexation with phytic acid}, author={Eny Kusrini and Agustino Zulys and Aryadipa Rachmana and Dwi Aprillia Wulandari and Yuswan Muharam and Anwar Usman and Arifur Rahman}, journal ...
hot acid leaching of silica sand
As part of an EC programme oxalic acid leaching technology has been studied on the pilot scale to reduce the iron content of the silica sand for use in the production of clear flat glassHot acid leaching of silica sand process crusher mining hot acid leaching of silica sand 53 views the is the professional mining equipments manufacturer in the ...
Purification of silica sand by acid leaching for glass production sand
The research (project) work covers the process of the purification of silica sand by the hydrofluoric acid leaching method for glass production. Fresh samples of silica sand were collected from the study area Zawan Jos South local government plateau state. The physical properties and chemical composition of the silica sand sample were determined.
Removal of iron from silica sand by leaching with oxalic acid
On the other hand, at temperatures as low as 10°C the addition of 5 - 1 0 m g / L Fe 2÷ to the initial solution strongly accelerates the iron dissolution process. From the above phenomena it is deduced that thermodynamic and kinetic inhibitions are taking place during leaching of silica sand in oxalate solutions.
Impurity removal process for high-purity silica …
Results show that after three acid leaching of silica, the total impurities concentration is reduced from 2379.9 to 1014 ppm. The concentrations of certain impurities such as P, B …
Technical noteInnovative technology for the production of …
Under the conditions of the ratio of mixed acid of 5 mol/L HCl + 1 mol/L HF, leaching temperature of 353.15 K, and leaching time of 12 h, the SiO 2 purity of high-grade silica reached 99.51%, and the removal efficiency of Fe, Al, Mg, and Ca from …
A hydrofluoric acid-free method to dissolve and quantify silica
Since SiO 2 dissolution or extraction is an essential step in Si quantification, alternative hydrofluoric acid-free solubilization and extraction protocols for silica have been explored.
(PDF) Production of High-Purity Silica Sand from Ivorian …
This low content coupled with a remarkable percentage in silica of 97.98 %.The tests by attrition and leaching with 40 % of sulphuric acid show, on the one hand, significant results with a high ...