Magnetic Separator

Introduction of Magnetic Separator
The magnetic separator is one of the most widely used and versatile machines in the industry. It is suitable for separating magnetic substances with magnetic differences. It is widely used in mining, wood industry, kiln industry, chemical, food and other industries. For the mining industry, the magnetic separator is suitable for wet or dry magnetic separation of manganese ore, magnetite, pyrrhotite, calcined ore, ilmenite, hematite and other materials with particle size less than 50mm, and also for iron removal of coal, nonmetallic ore, building materials and other materials. Magnetic separators are divided into two types. The magnetic system of permanent magnetic separators is mostly made of high-quality ferrite materials or composite with rare earth magnetic steel. In the early days, the average magnetic induction intensity on the magnetic cylinder surface of magnetic separators was 80-400mT. With the continuous development of technology, after the magnetic separator can be made into a roller shape, the magnetic field strength has also increased to 1650mT, which is the highest measured magnetic field strength at present.

Applications of Magnetic Separator
Magnetic separator is suitable for materials with magnetic difference, which is widely used for resource recovery, timber industry, mining industry, ceramics industry, chemical industry, food and other workshops. Magnetic separator is suitable for wet separating of materials with below 3mm particle size, such as magnetite, pyrrhotite, roasted ore, ilmenite and other materials. It is also used for iron removing operation of coal, non-metallic minerals, building materials and other materials, which is one of the most extensive and high versatility devices.
Advantages of Magnetic Separator
1. The magnetic system adopts NdFeB magnets with high magnetic energy product and high coercivity, which have high magnetic field strength and large action depth. The demagnetization rate of magnetic field strength in 8 years shall not exceed 5%.
2. Large wrap angle magnetic system with gradual and smooth transition of field strength can increase the length of separation zone and the number of magnetic reversals to achieve efficient separation of magnetic minerals and non-(weak) magnetic minerals.
3. The magnetic system is covered with non-magnetic stainless steel to ensure that the magnet does not fall off.
4. According to different purposes and separation conditions, each series of magnetic separators has different magnetic system design and tank structure.
5. The tank structure is semi-countercurrent. It can also be made into a downstream tank according to sorting conditions and user requirements.
6. The cylinder is made of non-magnetic stainless steel and coated with wear-resistant rubber, which significantly improves the service life of the cylinder.
7. The permanent magnetic drum has strong adaptability to production, can withstand large fluctuations in feed volume, feed size and pulp concentration, and can obtain superior beneficiation indexes of high grade and high recovery at the same time.
8. Reasonable design, reliable operation and convenient maintenance.

After the pulp flows into the tank through the ore feed tank, under the action of the water flow of the ore feed spout pipe, the ore particles enter the ore feed area of the tank in a loose state. Under the action of magnetic field, the magnetic ore particles gather to form “magnetic group” or “magnetic chain”. The “magnetic group” or “magnetic chain” moves to the magnetic pole under the action of magnetic force in the pulp and is adsorbed on the cylinder. Because the polarity of the magnetic pole is alternately arranged along the rotation direction of the cylinder, and it is fixed when working, “magnetic mass” or “magnetic chain” is rotating with the cylinder, the phenomenon of magnetic agitation occurs due to the alternation of the magnetic pole, the gangue and other non-magnetic minerals mixed in the “magnetic mass” or “magnetic chain” fall off during the turning, and finally are absorbed in the “magnetic mass” or “magnetic Lotus” on the cylinder surface. The concentrate is transferred to the weakest magnetic field at the edge of the magnetic system along with the cylinder, and is discharged into the concentrate tank under the action of flushing water from the ore discharge pipe. Nonmagnetic or weak magnetic minerals are left in the slurry and discharged out of the tank with the slurry.