Magnetic separator manufacturers briefly describe the important factors affecting the magnetic separation effect of dry magnetic separators. Dry magnetic separators are magnetic beneficiation machines for sorting dry magnetic minerals. Liquids are used when sorting minerals relative to wet magnetic separators. As a diluent to improve the sorting efficiency, the dry magnetic separator requires the sorted minerals to be dry, and the particles can move freely and become independent free states, otherwise the magnetic separation effect will be affected, and even the unselectable as a result of. So what are the factors that affect the magnetic separation effect of dry magnetic separators? This article is a powerful machine for everyone.
1. Effect of particle shape: Different shapes of ore particles show different magnetic properties when magnetized in the same magnetic field. The specific magnetization and specific magnetic susceptibility of the long strips are larger than those of the spherical ore. The cylindrical magnetite with the same composition and the same content is related to the magnetization and specific magnetic susceptibility and its length under the same magnetic field strength. The larger the length of the ore, the larger the specific magnetization and the specific magnetic susceptibility.
2. Influence of particle size: The magnetic properties of large magnetic ore particles are caused by the movement of magnetic domain walls and the rotation of magnetic domains, in which magnetic domain wall movement is dominant. As the particle size decreases, the number of magnetic domains contained in each of the ore particles decreases. When magnetized, the movement of the magnetic domain walls is relatively reduced, and the magnetic domain rotation gradually plays a leading role. When the particle size is reduced to the single magnetic domain state, no magnetic domain wall is moved, and at this time, the magnetic properties of the ore particles are completely generated by the magnetic domain rotation. The energy required to rotate the magnetic domain is much larger than the magnetic domain wall movement. Therefore, as the particle size decreases, the specific magnetic susceptibility of magnetite decreases and the coercive force increases.
3. Feeding speed. The feed rate is determined by the speed of the vibrating trough (or belt). Its speed determines the mechanical force of the time when the ore stays in the magnetic fear. The higher the speed, the shorter the ore stays in the magnetic field. The mechanical force of the ore is mainly gravity and inertia. Gravity is a The constant, inertial force is proportional to the square of the velocity. Weak magnetic ore particles receive less magnetic force in the magnetic field than gravity. Therefore, if the speed exceeds a certain limit, the magnetic force of adsorption will be insufficient due to the increase of inertial force, resulting in a decrease in recovery rate. Therefore, the selection of weak magnetic minerals should be lower than the rate of feeding of ferromagnetic minerals.
4. The thickness of the feed layer. It is related to the particle size and magnetic particle content of the raw material to be treated, and the coarse particles are generally 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 grain 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 the 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 absorbed, resulting in a decrease in the recovery rate. When the content of magnetic particles is high, the ore layer can be thicker.
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