High intensity magnetic separator is also calledHigh strength magnetic separatorOr super strong magnetic separator, which is divided into dry separator and water separator, is the general name of magnetic separators with magnetic field above 10000-16000GS, mainly used for magnetic separation of hematite, limonite, manganese ore, red mud ore and other weak magnetic minerals, and also used for separation of ilmenite, wolframite, siderite, chromite and other weak magnetic minerals.
It mainly includes excitation power supply control box, excitation coil, yoke, pole head, induction rollVibrating feeder, ore receiving trough and other components.It is mainly used for fine-grained non-ferrous metalsMetallic mineralsPurification, such as the purification of cassiterite, potassium feldspar, andalusite, sillimanite, quartz sand, zircon and other minerals.This machine is widely used in the production line of quartz sand purification and crystal powder purification in Donghai County, replacing other types of equipment to greatly improve product quality.The product is often upgraded by 1-2 grades, resulting in significant economic benefits.
High intensity magnetic separator is also used for iron removal of coal, non-metallic ore, building materials and other materials.
Product features
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High quality magnetic system of high intensity magnetic separatorFerrite materialOr it is compounded with rare earth magnetic steel, and the average magnetic induction strength of the cylinder surface is 100~600mT.According to the user's needs, it can provide various magnetic separations with different surface intensities, such as forward flow, semi reverse flow and reverse flow.The magnetic separator has the advantages of simple structure, large processing capacity, convenient operation, easy maintenance, etc.
Scope of application
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High intensity magnetic separatorIts main functions are to remove miscellaneous stones, improve the grade and realize sales.The equipment is used for the separation and impurity removal of weak magnetic ferrous metal ores or slags such as lean manganese ore, lean limonite, lean hematite, etc., to separate the concentrate and impurities in the raw ore, so as to improve the metal grade of the concentrate.
Magnetic circuit structure
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The high intensity magnetic separator must have a high magnetic field intensity and high magnetic field gradient. In order to meet this requirement, a reasonable magnetic circuit type must be selected.
The magnetic circuit type of high intensity magnetic separators currently used at home and abroad.The first two types are commonly used in dry high intensity magnetic separators, and the last four types are used forWet high intensity magnetic separatorMedium.
Magnetic system of magnetic separatorThe generated magnetic flux includes effective magnetic flux and leakage magnetic flux in the working gap. In the magnetic circuit of the magnetic separator, the smaller the leakage magnetic flux, the better.
The size of the magnetic leakage is related to the position of the winding in the magnetic circuit and the size of the working gap.Generally, the closer the winding is to the working gap, the better the use of magnetic potential, and the smaller the magnetic leakage.For example, the different relative positions of windings in the magnetic circuit, the first type has more magnetic leakage and the third type has less magnetic leakage. Its magnetic leakage is about one third of that of the first type. The magnetic leakage of the second type is between the first and the third type. The magnetic leakage coefficient K is generally 1.3-3.0 (the magnetic leakage coefficient is the ratio of the total magnetic flux to the effective magnetic flux).In addition, although the windings in the magnetic circuit are placed at the position closest to the working gap, the magnetic leakage magnitude is also different with different magnetic circuit structure types.
The experiment shows that although the three magnetic circuit windings are placed at the magnetic pole head, the magnetic circuit of the square magnetic system and the sun shaped magnetic system is longer, and the geometric shape of the magnetic circuit is not conducive to the passage of the magnetic line of force, so the magnetic leakage is large and the magnetic field strength is not easy to improve.The annular magnetic circuit is equivalent to the magnetic circuit of the motor. The sectional area of the iron core can be fully utilized, and the magnetic leakage is small, so the magnetic field strength is high.It can be seen that in order to ensure the formation of sufficient magnetic field strength and magnetic field gradient, and the rational use of magnetic sources, the magnetic circuit should be shortened as far as possible to reduce magnetic leakage.
Traditional conventional magnetic circuit, no matter what type, the magnetic energy of sorting space is mostly provided by the magnetic pole.Because the magnetic circuit has magnetoresistance, when the magnetic energy is transmitted to the sorting space, the magnetomotive force will inevitably have some losses to overcome the magnetoresistance on the magnetic circuit, and the iron core that forms the magnetic circuit will make the equipment structure bulky. Therefore, the rational use of magnetic energy, the reduction of the weight of the magnetic circuit and the magnetic leakage will become one of the directions of the further development of the strong magnetic separator.At present, the new magnetic circuit directly uses the coil cavity as the separation space.Wrap the yoke on the outside of the coil.That is, the solenoid with iron clad yoke, which greatly improves the efficiency of magnetic energy. When the same ampere turns and the same working conditions are used, the magnetic field strength of the new magnetic circuit is much greater than that of the old magnetic circuit. When the ampere turns are 50 × 104, the magnetic field strength of the traditional magnetic circuit is only 104Oe saturated, and the strength of the new magnetic circuit can reach 2 × 104Oe.
At present, the magnetic sources of magnetic separators for experimental research and industrial application at home and abroad include permanent magnet and electromagnetism, which are widely used. There are many types of magnetic separators with traditional (conventional) magnetic circuit, but often there are fields that can not meet the requirements and can not separate fine particles (200 mesh). The new Sala type is usedHigh gradient magnetic separator, which can compensate for the deficiencies of the former equipment.
According to the medium of magnetic separator, it can be divided into dry type and wet type.In order to improve the separation effect of the magnetic separator, the following basic requirements must generally be met:
1. Forming strong magnetic field intensity and gradient;
2. Make the material have enough residence time in the magnetic field;
3. Large separation area is required to ensure that magnetic particles can be collected;
4. Ensure the smoothness of pulp and the ability to clean impurities in concentrate.
Parameter is temporarily unavailable
maintain
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The maintenance quality of mechanical equipment is the premise and basis for the use of mechanical equipment. During the long-term use of mechanical equipment, mechanical parts wear, clearance increases, and coordination changes. The static balance and dynamic balance of mechanical equipment are damaged, and the working stability, reliability, and efficiency of machinery are significantly reduced,It may even cause permanent damage to some assemblies and parts.
advantage
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High-intensity Separators
1. Equipment magnetic rollMagnetic inductionUp to 12000GS, up to 14000GS. It has magnetic attraction that other equipment cannot reach, and meets the requirements of efficient separation of low-grade weak magnetic ores.2. Good separation effect: generally, the grade of lean manganese ore can be increased by more than 10 degrees;High intensity magnetic separator can improve the grade of lean limonite and hematite by more than 8 degrees.
3. Guangxi Yuanjian Magnetic provides users withMagnetic separation production lineA complete set of equipment, and on-site debugging equipment for customers, training operation and maintenance personnel for users, to ensure the normal operation of the production line.
classification
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According to the types of magnets, they can be divided into permanent magnetic separators and electromagnetic iron removers.
According to the dryness and wetness of the mine, it can be divided into: dry iron remover and wet iron remover.
According to the magnetic system, it can be divided into: drum type magnetic separator, roller type magnetic separator, drum type magnetic separator andFlat magnetic separator。
According to the number of magnetic systems, it can be divided into: single cylinder magnetic separator, double cylinder magnetic separator and combined multi cylinder magnetic separator.
According to the ore feeding mode, it can be divided into: upper ore feeding magnetic separator and lower ore feeding magnetic separator.
According to the magnetic field strength, it can be divided into weak magnetic separator, medium magnetic separator andHigh intensity magnetic separator。
According to the magnetic system, it can be divided into: open magnetic circuit magnetic separator and closed magnetic circuit magnetic separator.
influence factor
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There are many factors that affect the magnetic separation effect of the magnetic separator. In brief, there are four main reasons:
1. Whether the movement state of materials in the process of magnetic separation is conducive to magnetic capture
For example, when you take a piece of magnetic material and slowly put it on the magnet, it may be attracted, but if you throw it on the magnet far away, it is very likely to be the opposite result.
2. Whether the ore unloading method provided by the magnetic separation equipment is reasonable
Whether the magnetic field is cleaned up in time after capturing the magnetic object so as not to affect the next capture capability of the magnetic field.
3. Whether the magnetic force provided by the magnetic source of the magnetic separator is appropriate
When a magnetic object enters the magnetic field, the force is determined by the magnetic force at the point, which is not only determined by the level of the magnetic field, but also closely related to the gradient of the magnetic field at the point.
4. Feeding speed and material particle size
With regard to material particle size, strictly speaking, a well-designed magnetic separation equipment can only be used for the separation of materials with relatively concentrated strength distribution. It is inevitable that there will be no good results when one equipment is used to treat materials with large particle size differences.
