Three factors affecting the selection of dry magnetic separator

Dry magnetic separator is applied to a wet magnetic separation of iron ore, pyrrhotite, roasted ore, titanium, iron and other materials, a particle size of 3mm or less, the coal is also used in addition to iron, non-metallic minerals, building materials, etc. operation.

First, the thickness of the feed layer: it has a great relationship with the particle size of the material to be processed and the content of the magnetic particles. Generally, the feed layer is thicker than the fine particles. When the coarse-grain grade ore is treated, the thickness of the ore layer is about 1.5 times of the maximum particle. In the treatment, the particle size can reach about 4 times of the largest particle, and for the fine grain material, the thickness can reach 10 particles. When the content of magnetic materials in raw materials is not high, the ore layer should be thinner. If it is too thick, the magnetic particles in the lowermost layer are subjected to the pressure of the upper layer material, and the magnetic force cannot be sucked up, resulting in a decrease in the recovery rate. When the content of magnetic particles is high, the ore layer may be thicker.

Second, the magnetic field strength and working gap: it has a close relationship with the particle size, magnetic height and operation requirements of the material to be treated. When the working gap is constant, the magnetic field strength between the magnetic poles is determined by the number of ampere turns of the coil, and the number of turns cannot be adjusted. The intensity of the magnetic field can only be adjusted by changing the magnitude of the excitation current. For the selection of red magnetic masters, the weaker magnetic field should be used to deal with weak magnetic magnetic materials and sweeping operations. The field strength should be higher. When the current is constant, changing the working gap can not only change the strength of the magnetic field, but also change the magnetic field gradient, and reduce the magnetic force of the gap sharply. Generally, the particle size should be reduced as much as possible to increase the recovery rate. When selecting, it is best to increase the gap to increase the selectivity to improve the grade, but at the same time increase the excitation current to ensure the required magnetic field strength.

Third, the rate of feeding: the rate of ore is determined by the rate of the vibration tank (or belt). Its speed determines the mechanical force of the time when the ore is paused in the magnetic fear. The higher the rate, the shorter the ore stops in the magnetic field. The mechanical force of the ore is mainly gravity and inertia. Gravity is a Constant, the inertial force is proportional to the square of the velocity. The magnetic force of the weak magnetic ore particles in the magnetic field is not much higher than the gravity. Therefore, the rate is higher than the inertia force, and the magnetic force of the adsorption is insufficient, causing the acceptance rate to drop. Therefore, when selecting weak magnetic minerals, it is advisable to accept a feed rate lower than that of ferromagnetic minerals. The same is usually in the selection, the mass guessing more monomer particles, magnetic is stronger, the rate of ore feeding can be increased, when sweeping, the quality guess contains more connected organisms, magnetic is weaker, for progress The acceptance rate should be lower for the mine rate; when the fine particles are disposed, the frequency of the vibration tank should be high and the amplitude should be small in order to facilitate the looseness of the ore particles; Appropriate handling conditions should be determined by practice based on the ore traits and the requirements for sorting quality. When disposing of a number of metal ores, the material should be connected to a dry and narrow grade to feed the ore, which is conducive to the progress of the index. If the wide-scale feed is accepted, the magnetic force of the fine particles is greatly different, and the selection of the selection conditions is difficult. , the resume certificate, the more the original screening level, the better the index.

Rubber Anti-oxide Agent

Rubber Anti-oxidant Agent is a kind of rubber to join in the process of production can delay the ageing of the rubber, prolonging the service life of the rubber chemicals.