Mineral Processing

Quartz Processing Plant

quartz Processing

Quartz, also known as silica, is a common non-metallic mineral raw material with a wide range of applications.

The high-purity and ultra-high-purity quartz made by beneficiation and purification has been widely used in high-tech fields such as aerospace, atomic energy technology, laser, optical cable communication, and military industry. Realize refined quartz, high-purity and ultra-high-purity quartz to meet the needs of high-tech use.

Quartz Mining

Quartz sand purification is a difficult separation technology to remove small or trace impurities in quartz and obtain refined quartz sand or high-purity quartz. The quartz beneficiation process is generally determined by the following points: a. the occurrence state of impurity minerals in the original sand; b. the beneficiation cost of the purification process; c. the industrial use of the refined sand products.

  • For the refined sand quartz for general industrial use, the simple process flow is selected as much as possible to reduce the purification cost. It is recommended to use the scrubbing-desliming-magnetic separation process to meet the spiritual quality requirements.
  • For high-purity and ultra-high-purity quartz used as high-tech, it is necessary to further purify the quartz by flotation and acid leaching.

There are only a few raw ores in the world that can produce high-purity quartz sand for high-tech industries. There are many types of silica resources and large storage capacity. Quartzite, quartz sandstone and vein quartz are the main raw materials for producing high-purity quartz sand.
(1) Quartzite: a metamorphic rock dominated by quartz. It is formed by the metamorphism of quartz sandstone and siliceous rock, where the silica content is above 85%.
(2) Quartz sandstone: a sedimentary rock formed by cementing quartz particles, and its silica content is as high as 95%.
(3) Vein quartz: formed by filling silicon thermal fluid secreted by underground magma into rock fissures, and its silica content is as high as 99%.

Quartz Processing Plant

The steps of quartzite beneficiation process are roughly jaw crusher coarse crushing- pre-screening – controlled screening – ball mill grinding- classifing & desliming – magnetic separator magnetic separation – desliming – spiral chutes classification -Dryer/Press filter for dehydration.

1. Washing-classifying-desilting
In the quartz sand beneficiation process, the fine-grained grade with a particle size of less than 0.1 mm is usually called slime. For quartz sand with a large amount of clay and ore mud, as the particle size becomes finer, the grade of silica gradually decreases, while impurities such as iron and aluminum rise instead. Using water washing-classifying-desilting method can effectively improve quartz grade.
2. Scrubbing
For the thin film iron and adhesion impurities on the surface of quartz sand, the effect of water washing-grading desilting is poor. This requires the removal of the thin film iron and adhesion impurities suitable for the sand surface by means of mechanical force and the abrasive force between the sand particles. After the grading desilting, a better impurity removal effect can be achieved.
3. Gravity separation
gravity separation is to screen minerals according to their different gravity. Due to the difference in density, the mineral particles are affected by the fluid force and mechanical force in the medium, resulting in loose stratification, so that the ore particles are separated.
4. Magnetic separation
Magnetic separation is to separate the magnetic impurity minerals and particles in the quartz sand. The use of strong magnetic separator to separate the impurity iron in quartz is the key link. Magnetic separation can remove mechanical iron minerals (hematite, limonite, pyrite, ilmenite, biotite, etc.) mixed in quartz sand. It can also remove weak magnetic minerals and inclusions and disseminate impurities containing iron minerals.
5. Flotation
Flotation machine is the process of separating mineral particles by different physical and chemical properties on the surface of the mineral particles. The main function is to remove the related mineral mica and feldspar from the quartz sand.
The physical beneficiation method can only remove the impurities of mineral structure, and rarely remove the impurities on the surface of quartz sand. The purer the quartz sand, the higher the use value, so it is necessary to further purify the quartz sand after flotation.

6. Dewatering: Quartz stone is dehydrated and dried to obtain the required products, and the actual configuration should be adjusted according to the production needs.

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Quartz Mining Process

The magnetic separation method is recommended in the quartz stone beneficiation method. This kind of quartz stone magnetic separation process is usually carried out by a quartz sand strong magnetic separator. The quartzite beneficiation method is better, mainly because the magnetic field is stable in the beneficiation, and has the beneficiation advantages of small investment, low beneficiation cost and convenient maintenance. And the selected finished quartz sand has high precision, large market application demand, and high economic profit for the enterprise.
Quartz beneficiation and purification process:

Gravity separation method is suitable for quartz ore associated with iron-bearing heavy minerals;

Magnetic separation method is suitable for quartz ore associated with hematite, limonite, biotite and other impurities;

Flotation separation method is suitable for quartz ore associated with feldspar mine.
The specific quartz stone beneficiation equipment is corresponding to which quartz stone beneficiation method is used. If users want to know more, or the quartz stone beneficiation plan, the price of quartz stone beneficiation equipment, etc., just consult JXSC online for more information.

spiral separator
Spiral chutes
spiral sand washer
spiral sand washer
filter press
filter machine
magnetic separator
Magnetic separator

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