magnetic separation of quartz sand



magnetic separation of quartz sand


Magnetic separation is an essential process in the production of quartz sand, which has the advantage of strong selectivity. The main impurities removed are ferromagnetic minerals based on magnetite and weak magnetic impurities based on hematite, limonite and biotite.High yield of quartz sand can be obtained while removing impurities effectively.

01 Permanent magnet magnetic separator is preferred
Permanent magnetic equipment has the advantages of simple structure, stable performance and low operation cost. When the permanent magnetic equipment can reach the separation index, it is best to use permanent magnetic equipment. When the quality requirement is higher or the permanent magnetic separation equipment cannot be realized, it is better to use electromagnetic and other strong magnetic separation equipment.

02 Weak magnetism first, then strong magnetism
Quartz sand mixed in the crushing process of mechanical ferromagnetism is strong, should first use the weak magnetic separation equipment to remove, and then use the strong magnetic separation equipment to remove the weak magnetic impurities: if the strong magnetic material content is high, directly use the strong magnetic separation equipment to remove iron, strong magnetic material easy to block the strong separation channel, affect the separation index.

03 Wet sorting is used for fine particles
For fine or fine-grained minerals, due to the enhanced mutual adsorption between the particles, magnetic and non-magnetic inclusion is serious, such as dry separation, it is difficult to remove the magnetic clean, generally need to use wet method.In the case of wet separation, auxiliary methods such as rinsing and pulsation can be added to destroy the inclusion between magnetic and non-magnetic materials, effectively improving the probability of magnetic materials being captured by magnetic field.

04 Dry separation may be used for high - precision separation
In the coarse grain and fairly high purity iron purification, non-metallic mineral dry magnetic separation method, can be used in the process of sorting, managed to get the material layer shaped loose state through a strong magnetic field, the magnetic material and the weak magnetic material between almost no inclusions, through strong magnetic field magnetic material is easy to capture, in addition to iron precision is very high, but this kind of method to deal with smaller average ability.

05 Select the appropriate sorting granularity
The particle size of material is very important to the sorting effect. In the case of meeting the requirement of product particle size, iron removal should be carried out at a coarser particle size as far as possible.Because the finer the particle size is, the more crushing times will be, and the more mechanical iron will be mixed in, the processing capacity of the equipment will be reduced, and the production cost will be increased.

06 Avoid remixing of iron impurities
Non-metallic ore processing process is relatively simple, in the iron removal operation, try not to break, screening and other operations;In the process design, magnetic iron removal should be placed behind as far as possible to avoid the secondary mixing of iron impurities.

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