Pressure leaching of high silica Pb–Zn oxide ore in sulfuric …

The pressure leaching of high silica Pb–Zn oxide ore using air as pressurized gas in sulfuric acid medium is studied systematically in the present paper. Study parameters include the concentration of sulfuric acid, partial air pressure, leaching temperature, leaching time, and liquid-to-solid ratio. Conclusions (1) The pressure leaching of Pb ...

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Pressure leaching of high silica Pb–Zn oxide ore in sulfuric …

Since then, this method has been applied in several studies, such as in Egyptian Zn silicate ore by Abdel Aal and Shukry (1997). Hua et al. (2002) applied microwave irradiation to the quick leaching of Zn silicate ore. The leaching percentage of Zn was 99% and the extent of dissolution of Silica and Fe were as low as 0.30% and 0.10%, respectively.

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Preparation of high purity silica from silica rock by leaching process: Optical application

In this study, we develop an S-HGMS coupling with acid leaching technology for recovery and purification of high-grade silica from high-silica IOTs, which aim to obtain high …

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Innovative technology for preparation of high-purity silica …

In the present work, an S-HGMS coupling acid leaching technology was established to prepare high-purity silica using vein quartz ore. Firstly, the magnetic properties of different phases in vein quartz were investigated through density functional theory (DFT) calculations and arranged the phases in terms of magnetic susceptibility: FeP 2 > Al 2 SiO 5 > SiO 2 > Ca(Al 2 …

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Silica and Iron Recovery from a Residue of Iron Ore Flotation

The silica mainly comes into the ore due to the accompany of quartz and silicate associated clay minerals. ... In the aim to remove residual iron content from the ore surface, the leaching process ...

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Template-Free Preparation and Characterization of Mesoporous Silica

In this study, mesoporous silica was prepared from thermal activated kaolinite ore via a template-free pre-alkali acid leaching technique. The acid leached product was characterized by x-ray diffraction, transmission and scanning electron microscopy, energy dispersive spectrometry and Nitrogen gas adsorption. The results showed the porous silica …

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Silica Ore Extraction Processing Flowsheet

911 Metallurgist is a trusted resource for practical insights, solutions, and support in mineral processing engineering, helping industry professionals succeed with proven expertise. | Silica Ore Extraction Processing Flowsheet

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Sulfuric acid leaching of zinc silicate ore under pressure

The ore (− 98 + 74 μm) was leached in solution containing 0.46 mol/L sulfuric acid for 120 min at 140 °C at different L/S ratios ranging from 6 to 10. The obtained data plotted in Fig. 7 show that L:S ratio affected significantly the leaching recovery of iron and silica but zinc slightly. The dissolution of silica increases with increasing ...

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Dissolution and Removal of Silicates in Acid Leaching Process

The pressure leaching of high silica Pb-Zn oxide ore using air as pressurized gas in sulfuric acid medium is studied systematically in the present paper.

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Silica and Iron Recovery from a Residue of Iron Ore …

According to Abdelkrim [6], purification of silica from flotation residue may be performed by acid leach-ing with percolation using a mixture of hydrofluoric acid (HF) and hydrochloric acid (HCl) …

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Any ideas for leaching iron ore to remove silica?

Iron ore is finely interlocked with silica, I m looking for suitable leaching solution to remove silica. The major phases are Hematite, Iron Oxide Hydroxide, Silicon oxide, Pyrolusite and minor ...

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A shrinking particle

DOI: 10.1016/J.MINPRO.2009.06.003 Corpus ID: 95479930; A shrinking particle - shrinking core model for leaching of a zinc ore containing silica @article{Safari2009ASP, title={A shrinking particle - shrinking core model for leaching of a zinc ore containing silica}, author={Vida Safari and Gilnaz Arzpeyma and Fereshteh Rashchi and Navid Mostoufi}, journal={International Journal …

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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 …

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Innovative technology for the production of high-purity sand silica …

The production of high purity silica out of natural sand plays a critical role as a starting material in the industry of glass and high grade silicon.In this paper, we expose a novel processing method for the purification of sand silica.This method is a subsequent combination of thermal treatment and acid leaching.

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Innovative Technology for Preparation of High-Purity Silica …

Download Citation | On Jul 1, 2023, Yongkui Li and others published Innovative Technology for Preparation of High-Purity Silica from Vein Quartz Ore Through S-HGMS Coupling Acid Leaching Process ...

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A shrinking particle—shrinking core model for leaching of a zinc ore

A mathematical model was developed for leaching of zinc from a zinc ore containing silica. It was shown that considering only the chemical reaction of zinc dissolution is not sufficient for estimating the leaching time of the ore. A thin gelatinous layer was considered to cover the reacting core of the ore in order to correct the model prediction.

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WO2020206892A1

the dissociation methods using non-metallic minerals as raw materials are roughly divided into two types. One is to leaching raw materials with sodium hydroxide solution to obtain

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Leaching of a complex sulfidic, silicate-containing zinc ore …

Silica content is on a very low level under oxygen pressure sulfuric acid leaching. Its technical feasibility is demonstrated as a new alternative for the leaching of complex sulfidic, silicate-containing zinc ore. Having excellent solid–liquid separation characteristics of the slurry will be achieved. Impurities (such as iron and silica ...

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Recovery of scandium from silicate minerals by high-pressure leaching

In addition, the silica gel formation can be inhibited during the acid-leaching process at high temperatures, and the filtering of solution will become easy. 32 Considering cost saving and waste liquid reduction, the weight ratio of sulfuric acid to ore powder (A/O) was unified at 1.1, and the initial temperature of ore slurry was heated to 90 °C.

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Eco-friendly strategy for preparation of high-purity silica …

Thus, this study proposed an eco-friendly technology for producing high-purity silica from high-silica IOTs through the coupling of superconducting high gradient magnetic separation (S …

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Gel avoidance in leaching of high silica containing ores

Leaching with 2.5M H2O2: 2.5M H2SO4 mixture at 90°C for 30min was observed to be the best leaching conditions with suppressed silica gel formation and the highest reported leaching efciency with ...

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Extraction Behavior of Nickel and Cobalt From Serpentine-Rich Ore …

The appropriate leaching temperature and time were required to prevent the loss of nickel and cobalt during leaching process in the presence of amorphous silica originated from SiO 2 in the serpentine-rich ore. It was also indicated that the sulfation–roasting–leaching process followed the shrinking core model as the limiting step where the ...

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silica ore leaching costsale in Oman

In the present work, an S-HGMS coupling acid leaching technology was established to prepare high-purity silica using vein quartz ore. Firstly, the magnetic properties of different phases in …

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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 establish the location of the …

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Pressure leaching of zinc silicate ore in sulfuric acid medium

We can also see from Fig.4 that the dissolution of silica is affected little by changes of the pressure from 600 kPa to 1 600 kPa, and the maximum dissolution rate of silica is only 0.8%. 3.4 Effect of reaction time The effect of reactive time on the leaching of zinc silicate ore was studied in the reaction time range of 30 LI Cun-xion, et al ...

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Removal of iron from silica sand by leaching with oxalic acid

Silica is the most important raw material in glass industry. In this paper, decreasing of iron content (Fe 2 O 3 ) using agitated and vat acidic leaching were investigated. Silica sample were provided from Shenin mine located in Qazvin province, Iran. Two levels full factorial design (FFD) and multivariate regression methods were applied.

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Recovery and preparation of high-grade silica from iron ore …

DOI: 10.1016/j.powtec.2023.118523 Corpus ID: 258067080; Recovery and preparation of high-grade silica from iron ore tailings by S-HGMS coupling with acid leaching technology: Description of separation mechanism and leaching kinetics

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Silica and Iron Recovery from a Residue of Iron Ore Flotation

The developed process of silica and iron recovery consisted of size classification, magnetic separation, and removal of impurities by leaching. A concentration of SiO2 from 33.4% to …

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A shrinking particle—shrinking core model for leaching of a zinc ore

Leaching of the ore at pH ca. 2, transforms the silicate compounds of the ore to colloidal silica, i.e., a gel (Matthew and MA Elsner, 1997). ED Process kinetics and optimum operating conditions have been studied for the leaching of zinc silicate ore tailings.

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Innovative Technology for Preparation of High-Purity Silica …

DOI: 10.1016/j.psep.2023.07.067 Corpus ID: 260263909; Innovative Technology for Preparation of High-Purity Silica from Vein Quartz Ore Through S-HGMS Coupling Acid Leaching Process

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Study on the Purification Mechanism of Low-Grade …

Under these conditions, the silicon ore exhibited residual Fe and Al contents of 85 and 320ppmw, respectively, achieving the highest removal rates of 97.98% and 97.85%, the SiO 2 content in silicon ore increased from 94.08% to 99.42%. Compared with leaching under atmospheric pressure leaching, pressure leaching resulted

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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 to remove low iron …

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Pressure leaching of high silica Pb–Zn oxide ore in sulfuric …

The pressure leaching of high silica Pb–Zn oxide ore using air as pressurized gas in sulfuric acid medium is studied systematically in the present paper. Study parameters include …

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Eco-friendly strategy for preparation of high-purity silica …

Iron ore tailings (IOTs), a typical hazardous solid waste, seriously threaten human health and the ecological environment. ... employing the "ultrasound-assisted fluorine-free acid leaching process," impurity elements were removed and high-purity silica was produced. Under optimal leaching conditions, the SiO 2 purity of silica sand increased ...

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Recovery of zinc from a low-grade zinc oxide ore with high …

The low-grade zinc oxide ore with high silica was treated through the process of sulfuric acid curing and water leaching. The ore was firstly cured for 3 h by sulfuric acid with a concentration of 55.17%H 2 SO 4 and a consumption of 1288 kg/t, and then leached using water for 3 h at 50 °C with a liquid to solid ratio of 5:1 mL/g and a stirring ...

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Abstract and Figures

A new mechanism model for metal extraction from olivine-bearing ore by avoiding silica gel formation during leaching with hydrochloric acid including a carbonation pre-treatment is proposed.

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