The purification of high-purity quartz sand is mainly to remove a few or trace impurities during it to obtain high-purity quartz sand. Commonly used processes include wiping, gravity separation, magnetic separation, flotation, and acid leaching.

Wipe: Use mechanical force and peeling force between sand grains to remove impurities, iron, bonding and mineral mud on the surface of quartz sand. Wiping enables the quartz sand deposit to effectively discharge a part of impurities in the early stage, clean the appearance of the quartz sand particles, and then smoothly carry out the subsequent purification work.

Re-selection: Re-selection is to screen mineral deposits according to the different gravity of mineral deposits. Due to the difference in density, the mineral particles are affected differently by fluid and mechanical forces in the medium, and loose stratification occurs, and then the ore particles are separated.

Magnetic separation: Magnetic separation is the separation of magnetic impurity minerals and particles in quartz sand. Quartz in quartz sand is a diamagnetic substance and cannot be magnetized in a magnetic field. Most of the impurities containing Fe and Ti are paramagnetic substances that can be magnetized. Then, the impurities containing Fe and Ti can be removed by magnetic separation. Very high quartz sand content. The commonly used equipment for magnetic separation is a wet strong magnetic separator and a high gradient magnetic separator.

Flotation: Flotation is the process of separating mineral particles through different physical and chemical properties on the surface of mineral particles. The main function is to remove related mineral mica and feldspar from the quartz sand. The study found that the pH value of the slurry and the type and amount of collectors have a significant impact on the flotation purification.

Acid leaching: Quartz is insoluble in acid (hydrofluoric acid outside). After acid dissolves iron and other harmful elements, the impurities are separated to obtain high-purity quartz sand. Impurities in the surface and crevices of quartz sand can be removed to the limit by acid leaching, and physical methods such as magnetic separation and flotation can only remove impurities of mineral structure.

Studies have found that the use of mixed acid in the acid leaching process to remove impurities is better. Quartz will be dissolved by hydrofluoric acid, so the concentration of hydrofluoric acid in the mixed acid should not be too high. Time, acid concentration, washing process and temperature are all factors that affect the effect of acid leaching.

The above is how the high-purity quartz sand is prepared by the editor described to us, we can briefly understand and have a look. The content is for reference only, and those who need to understand and consult can contact our manufacturer.