Limestone magnetic separator

Magnetic separator is one of the most widely used and versatile models in the industry and is suitable for the separation of substances with magnetic differences. Magnetic separators are widely used in mining, wood industry, kiln industry, chemical, food and other industries. For mining, magnetic separators are suitable for wet or dry magnetic separation of manganese ore, magnetite, pyrrhotite, roasted ore, ilmenite, hematite and other materials below the particle size. It is also used for coal, non-metallic Iron removal operations for minerals, building materials and other materials. Magnetic separators are divided into two types. The magnetic system of permanent magnet magnetic separators is mostly made of high-quality ferrite materials or compounded with rare earth magnet steel. The average magnetic induction intensity on the front cylinder is -. Due to the development of technology, the magnetic separator can be made into a roller shape and the magnetic field intensity has been increased to the highest magnetic field intensity currently measured.
.> Necessary conditions
.> In addition to being affected by the magnetic force in the magnetic field of the magnetic separator, the magnetic particles are also affected by the competitive force. Competitiveness can be defined as the resultant force of all mechanical forces in the opposite direction to the magnetic force, including gravity, centrifugal force, inertial force and hydrodynamic resistance. In the magnetic separation process, magnetic force is the force that captures magnetic particles, also known as magnetic capture force. Competitiveness is the force that makes magnetic particles detach from magnetic poles, also known as detachment force. Obviously, the necessary condition for the separation of magnetic particles and non-magnetic particles is that the magnetic force on the magnetic particles is greater than the competitive force. To separate two particles with different magnetic properties, the necessary condition is that the magnetic force on the stronger magnetic particles should be greater than the competitive force, and the magnetic force on the weaker magnetic particles should be less than the competitive force. It should be noted that in the practice of magnetic separation, it is impossible to have absolutely pure magnetic products and non-magnetic products. In addition to undissociated monomers affecting product purity, some monomeric magnetic particles are mixed into non-magnetic products. Some monomeric non-magnetic particles are mixed into magnetic products. in the product. In the former case, the main reason for the decrease in the recovery rate of magnetic components is that the particle size of these magnetic particles is too fine. In the latter case, the reason for the decrease in the grade of magnetic products is mostly because of the strong friction between the particles. Interaction force The finer the particle size, the greater the slurry concentration and the more obvious the interaction force between particles.
.> The electromagnetic coil can magnetize the iron core and magnetic poles of the magnetic separator to generate a magnetic field around it. The magnetic field between the magnetic poles causes the mineral particles to become magnetized and produce magnetic force. Non-magnetic mineral particles can only receive a weak magnetic force that cannot be observed with the naked eye, resulting in the separation of magnetic mineral particles and non-magnetic mineral particles. Therefore, further understanding of the magnetization of matter, including the structure of magnetic matter, its behavior in a magnetizing magnetic field and the measurement of magnetization degree, is essential for understanding the nature of the magnetic separation process.
.> After the slurry flows into the tank through the feeding box, the ore particles enter the feeding area of the tank in a loose state under the action of the water flow from the feeding water spray pipe. Under the action of the magnetic field, the magnetic mineral particles undergo magnetic aggregation to form magnetic clusters or magnetic links. The magnetic clusters or magnetic links move towards the magnetic poles under the action of magnetic force in the slurry and are adsorbed on the cylinder. Since the polarity of the magnetic poles are alternately arranged along the rotation direction of the cylinder and are fixed during operation, the magnetic clusters or magnetic links are mixed in the magnetic clusters or magnetic links, causing a magnetic stirring phenomenon due to the alternating magnetic poles when the cylinder rotates. The gangue and other non-magnetic minerals fall off during the turning, and the magnetic clusters or magnetic chains that are finally attracted to the surface of the cylinder are the concentrate. The concentrate is transferred to the edge of the magnetic system along with the cylinder, where the weakest magnetic force is discharged into the concentrate tank under the action of the flushing water jet from the unloading water pipe. If it is a full-magnetic magnetic roller unloading, a brush roller is used. Non-magnetic or weakly magnetic minerals are left in the slurry and are discharged out of the tank as tailings.
.> Permanent magnet magnetic roller (also called magnetic pulley) is mainly suitable for the following purposes:
.> Rough selection of lean iron ore after coarse or medium crushing to remove surrounding rock and other waste rocks to improve grade Reduce the load on the next process.
.> It is used in the hematite reduction closed-circuit roasting operation to sort out the raw ore that has not been fully reduced and return it to be burned again.
.> Used in the ceramic industry to remove iron mixed in porcelain clay to improve the quality of ceramic products.
.> Iron removal operations are required in coal mines, foundry sand, refractory materials and other industries.