Regulate the operation of magnetic separator
Magnetic Separator is the key equipment in the beneficiation process, re-use powder used in the removal of mitochondrial iron and so on. Magnetic separator for particle size below 3mm magnetite, pyrrhotite, roasted ore, ilmenite, manganese and other materials, wet magnetic separation, but also for coal, non-metallic minerals, building materials, iron and other materials operation. This article describes the dry magnetic separator magnetic field the main operation points.
Regulate the operation of magnetic separator main factors to note are: a material layer thickness (to the ore), vibrating trough vibration velocity, magnetic field strength and the work space and so on.
(1) to the material thickness
To the material thickness to be handled with the raw material particle size and magnetic mineral content. Coarse-grained than fine-grained processing of raw materials to the seam generally thicker more. Processing crude level, feeding the thickness of not more than about 1.5 times the maximum size is appropriate, and when the treatment level to the material thickness up to about 4 times the largest particle size, fine-level up to 10 times.
Magnetic mineral content of raw materials is limited, to the material layer to be thinner. If too thick, the lowest level in the magnetic mineral particles by the magnetic force is not only smaller, and in addition to its own weight, but also be above the pressure of non-magnetic mineral particles, reducing the recovery of magnetic products. Magnetic minerals for a long time, may be appropriate to the material layer thicker.
(2) magnetic field strength and the work space
Gap magnetic field strength and work to be handled with the granularity of raw materials, magnetic and job requirements are closely related. Work space is constant, the magnetic field strength between the two poles determine the safety of the coil turns, turns is not adjustable, so the use of change to adjust the size of current magnetic field strength. The size of the magnetic field strength depends on the magnetic material to be processed and operational requirements. Strong magnetic minerals processing and selection of these operations, the magnetic field strength should be weak.
Weaker magnetic minerals processing and scanning election operations, a strong magnetic field should be used.
Current is constant, change the size of the gap can make the work of the magnetic field strength and field gradient at the same time change. Therefore, changing the current role and work space is not the same. Will reduce the working gap magnetic field strength increased dramatically. Work depends on the size of the gap be processed grain size of raw materials and operating requirements. When dealing with larger coarse level, when dealing with smaller class size. Election sweep as much as possible to adjust the working gap to the minimum in order to increase the recovery rate; selected, it is best to transfer larger work space and reduce the polarization between the magnetic field distribution and increase the non-uniformity of magnetic mineral particles to the plate teeth the distance from tip to increase the separation selectivity and improve the quality of magnetic products, but also necessary to appropriately increase the current to compensate for increased work space by reducing the magnetic field strength.
(3) speed of vibration of the vibration slots
Vibration velocity of vibration trough decision mineral particles in a magnetic field the duration and size of mechanical force suffered. Vibration frequency and amplitude of vibration trough the product of the greater, the greater the vibration velocity, mineral particles in the magnetic field in the shorter length of stay.
Mineral particles on the role of mechanical forces of gravity and inertia force to the main, gravity is a constant, inertia force proportional to the square of velocity changes. Weak magnetic minerals in a magnetic field magnetic suffered little more than gravity, so the speed of vibration tank exceeds a certain limit if, the sharp increase in force due to inertia, magnetic force to suck well enough to play them, so weakly magnetic minerals In the magnetic separator magnetic field strength the velocity should be lower than the velocity of magnetic minerals.
In general, the selection, the raw material monomer in the multi-minerals, and their strong magnetic properties, vibration trough vibration speed can be higher; sweep the election, even the raw material containing the body more, and even the living body than the magnetic and weak, in order to increase the recovery rate, the rate of vibration of tank should be lower. Fine-grained material handling, vibration frequency should be slightly higher trough (in favor of loose mineral particles), smaller amplitude; and handling coarse material should be slightly more frequency, amplitude should be larger. Suitable operating conditions should be selected based on material properties and sub-requirements to be determined through practice.
Separator in practical application process, according to the actual situation of production adjustment of the magnetic separator, magnetic separator to ensure normal and stable operation.
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