— The American silica sand concentrator uses sodium petroleum sulfonate and kerosene as collectors under acidic conditions to separate biotite and iron ore, which reduces the content of Fe2O3 from 0.12% to 0.18% to 0.06% to 0.003%. Flotation iron removal process is simple, low cost and good effect.

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.

Chemical analysis shows high content of SiO2. Coloring elements (Fe2O3) and (TiO2) are slightly elevated. The study aim was to remove impurities from silica sand, in order to upgrade quartz sands and to produce material that has a higher potential value for industrial manufacturing processes.

The leaching allows us to reduce the iron content in quartz sand significantly, while wet sieving removes only the fraction of these contaminating minerals (<125 µm). The applicability of magnetic separation requires further study and substantiation.

 — The objective of this investigation was to reduce the processing time and the total iron content below 105 ppm in the sand product for special glass applications.

 — This article will take you to learn more about these 6 methods of iron removal from silica sand. 1. Iron Removal by Mechanical Scrubbing. 2. Iron Removal by Magnetic Separation. 3. Iron Removal by Flotation. 4. Iron Removal by Acid Leaching.

 — 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.

 — Under the optimal parameters, the SiO2 content of the concentrates increased from 97.841 to 99.907% and the Fe2O3 content reduced from 0.225 to 0.011%. This study aimed to remove the contaminants in quartz sand by using an eco-friendly method and to obtain high-purity quartz.

Mechanical scrubbing is the process of removing thin films of iron and iron containing minerals adhering to the surface of silica sand through the collision and friction between mechanical external forces and sand particles.

 — 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...