Quartz sand purification and beneficiation process

Quartz sand is an important industrial raw material, widely used in quartz glass, ceramics, metallurgy, chemical industry and other fields. With the development of industry, the demand for high-purity quartz sand is also increasing year by year.

Quartz sand purification and beneficiation process is to remove the mineral impurities in the quartz sand through several methods such as scrubbing and desliming, magnetic separation, and flotation to obtain high-purity quartz sand with particle size and impurity content that meet the requirements.

Quartz sand purification and beneficiation process_scrubbing and desliming method
With the help of the mechanical force of the scrubbing machine and the grinding and peeling force between the sand particles, the thin film iron, bonding and muddy impurity deposits on the surface of the quartz sand are removed, and the mineral deposits that have not been formed into monomers are further crushed, and then further purified by classification. The role of silica sand.

Quartz sand purification and beneficiation process_magnetic separation method
Magnetic separation is one of the effective methods to remove iron-containing impurities in raw materials. Because the minerals such as hematite, limonite and biotite contained in the raw materials have weak magnetism, they can be separated by wet strong magnetic separator when the magnetic field strength is above 8×105A/m (ampere/meter); Strong magnetic minerals containing impurities mainly magnetite are separated by weak magnetic separator or medium magnetic separator. In order to further remove a small amount of other weak magnetic minerals (such as hornblende, pyroxene, and the joint growth of magnetic minerals and quartz), a high-gradient magnetic separator with a magnetic field strength greater than 12,000 Gauss can be used for secondary magnetic separation.

Quartz sand purification and beneficiation process_flotation method
If there are many types of mica minerals in the raw material, it is impossible to completely remove the impurities by using the spiral chute. In addition, if the raw material also contains a certain amount of feldspar minerals whose specific gravity is similar to that of quartz, the flotation process can be used to remove these impurity minerals. At the same time, when the quartz minerals and gangue minerals do not reach a certain degree of monomer dissociation, it is necessary to increase the grinding fineness.

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