Separator is a very unique type of mineral related equipment for magnetic iron ore, pyrrhotite, roasted ore, titanium, iron ore and other materials of a particle size below 3mm wet magnetic separation, but also for coal, non-metallic The iron removal operation of minerals, building materials and other materials is one of the most widely used and highly versatile models.

Various magnetic separation equipment

Magnetic separator is a kind of special mineral processing equipment. It is suitable for wet magnetic separation of magnetite, pyrrhotite, roasting ore, ilmenite and other materials with particle size below 3mm. It is also used in coal and non-metal ore. The iron removal operation of materials such as building materials is one of the most widely used and highly versatile models.

Magnetic particles in the magnetic field of the magnetic separator, in addition to the role of magnetic force, are also competitive. Competitiveness can be defined as the combined force of all mechanical forces opposite to the direction of the magnetic force, including gravity, centrifugal force, inertial force, and hydrodynamic drag. In the magnetic separation process, the magnetic force is the force for capturing magnetic particles, also known as the magnetic trapping force; the competitiveness is the force that causes the magnetic particles to escape from the magnetic pole, which is also called the disengagement force.

Obviously, the necessary condition for the separation of magnetic particles from non-magnetic particles is that the magnetic particles are subjected to a magnetic force greater than the competitiveness. In order to separate two magnetically different particles, it is necessary that the magnetic force of the stronger magnetic particles should be greater than the competitiveness, and the magnetic force of the weaker magnetic particles should be less than the competitiveness.

It should be noted that in the practice of magnetic separation, it is impossible to have absolutely pure magnetic products and non-magnetic products. Except for the unnaturalized dissociated symbiotic bodies affecting product purity, some monomeric magnetic particles are mixed into non-magnetic products, some of which are non-magnetic. Magnetic particles are mixed into the magnetic product.

In the former case, the recovery rate of the magnetic component is lowered, mainly because the particle size of the magnetic particles is too fine, the magnetic force is insufficient to overcome the competitiveness of the fluid resistance, and the latter case causes the grade of the magnetic product to decrease, and the reason is mostly the particle. There is a strong interaction force, the finer the particle size, the greater the slurry concentration, and the more obvious the interaction force between the particles.

So, what are the possible mistakes in choosing a magnetic separator?

1. It is not necessary to distinguish the magnetic material in the material, and the higher the magnetic field is, the better.

2. A single magnetic separator solves the magnetic substances in a variety of materials.

3. The operating state of the material during magnetic separation and iron removal is not fully considered.

4. A high magnetic field is equal to a high magnetic force.

5. Install magnetic separation and iron removal equipment from a certain point to solve the problem of magnetic pollution of a system.

6. Blind investment, investment is equal to solving the problem.

The existing magnetic separation equipment for non-metallic ore removal has a variety of equipment, which should be selected according to the process flow and material properties. The following selection principles can be used as a reference:

1. The permanent magnet magnetic separator is preferred. The permanent magnet device has the advantages of simple structure, stable performance and low operating cost. When the permanent magnet device can reach the sorting index, the permanent magnet device is used as much as possible, and the quality requirement is high or the permanent magnet magnetic separation device cannot be realized. Next, consider using a strong magnetic separation device such as electromagnetic.

2, first weak magnetic and strong magnetic. Non-metallic minerals have strong mechanical ferromagnetism during the crushing process. They should be removed by weak magnetic separation equipment, and then the weak magnetic impurities should be removed by strong magnetic separation equipment. If the content of strong magnetic materials is large, the magnetic flux is directly used. In addition to iron, the strong magnetic material is easy to block the strong sorting channel and affect the sorting index.

3. Wet sorting is used for fine particles. For fine-grained or fine-grained minerals, the mutual adsorption between the particles is enhanced, and the inclusion between the magnetic and non-magnetic materials is severe. If dry sorting is used, it is difficult to remove the magnetic material, and the wet method is generally required. In the case of wet sorting, an auxiliary manner such as rinsing or pulsation can be generally added to break the inclusion between the magnetic substance and the non-magnetic substance, and the probability that the magnetic substance is captured by the magnetic field is effectively improved.

4, high-precision sorting can be used for sorting. In the process of removing iron and purifying high-purity non-metallic ore with relatively coarse particle size, dry strong magnetic separation method can be used. In the sorting process, the material is managed to make the material in a single layer loose state through the strong magnetic field region, non-magnetic material. There is almost no inclusion between the weak magnetic material, so that the magnetic material is easily captured when it passes through a strong magnetic field, and the iron removal precision is high, but the processing capacity of this method is generally small.

5. Choose the appropriate sorting granularity. The particle size of the material is crucial for the sorting effect. In the case of meeting the product particle size requirements, the iron removal operation should be carried out at a coarser particle size. Because the finer the particle size, the more the number of breaks, the more mechanical iron is mixed in, the processing capacity of the equipment is also reduced, and the production cost is increased.

6. Avoid secondary mixing of iron impurities. The processing flow of non-metallic ore is relatively simple. After the iron removal operation, try not to crush or sift again. In the process design, the magnetic separation and iron removal work should be placed as far as possible after the iron removal operation. After that, it must be crushed. Non-mechanical crushing methods such as jet pulverization should be used as much as possible to avoid secondary mixing of iron impurities.