Types of impurities: impurities in quartz sand mainly include feldspar, mica and other aluminosilicate minerals, as well as iron, titanium, calcium, magnesium and other metal oxides, as well as some clay minerals and organic matter.

Hazards: The presence of impurities will affect the chemical stability, fire resistance, insulation and other properties of quartz sand. For example, iron impurities will change the color of quartz sand at high temperatures, reduce its whiteness and purity, and affect its application in high-end fields such as optical glass and electronics.

Scrubbing and desliming: through mechanical stirring or ultrasonic waves, the quartz sand particles collide and rub with each other, the fine impurities such as clay attached to the surface are scrubbed down, and then the impurities are removed by means of classification and filtration.

Magnetic separation: the use of different mineral magnetic differences, in the magnetic field under the action of magnetic impurities and quartz sand separation, can effectively remove iron, titanium and other magnetic minerals.

Flotation: according to the different wettability of mineral surface, adding suitable flotation reagent, so that the purpose of mineral attached to the bubble floating, and stay in the slurry of quartz sand separation, commonly used to remove feldspar, mica and other aluminum silicate minerals.

Acid leaching: the use of acid and impurities chemical reaction, the metal oxide and other impurities dissolved, after filtration, washing and other operations to remove impurities, can significantly improve the purity of quartz sand.

Raw ore after crushing, grinding and other pretreatment, so that the quartz sand and impurities to achieve monomer dissociation.

Then scrubbing desliming, magnetic separation and other steps are carried out in turn to initially remove most of the impurities.

For products with high purity requirements, deep purification treatment such as flotation and acid leaching will also be carried out.

Finally, after filtering, drying and other processes, high purity quartz sand products are obtained.

In actual production, according to the nature of quartz sand ore, impurity content and product quality requirements, optimize the process, select the appropriate purification methods and equipment, in order to achieve efficient and economic purification effect.