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Effect of Magnetic Properties of Dry Magnetic Separator Minerals on Magnetic Separation

Time:2019-05-20 15:39:48

The dry magnetic separator is a commonly used iron ore equipment and manganese ore equipment, and the mainstream strong magnetic separator ore dressing equipment. The dry magnetic separator is a magnetic beneficiation machine for sorting dry magnetic minerals. Compared with the wet magnetic separator, when using minerals as a diluent to improve the sorting efficiency, the dry magnetic separator is required to be The sorted minerals are dry, and the particles can move freely and become independent free states. Otherwise, the magnetic separation effect will be affected, and even the result of non-sorting may be caused.
magnetic magnetic

The dry magnetic separator is suitable for wet magnetic separation of magnetite, pyrrhotite, roasting ore, ilmenite and other materials with a particle size of 3mm or less. It is also used for iron removal of coal, non-metallic minerals, building materials and other materials.

Effect of Mineral Magnetics of Dry Magnetic Separator on Magnetic Separation Process

The magnetic magnetic properties of the dry magnetic separator are the decisive factors for determining the magnetic separation process. The weak magnetic field magnetic separator is used to recover the ferromagnetic minerals, and the strong magnetic field magnetic separator is used to recover the weak magnetic minerals.

In the magnetic separation of ferromagnetic minerals, in addition to the magnetic susceptibility of the particles, the coercivity and the remanence of the minerals also play an important role. These factors cause the particles to form agglomerates in the dry magnetic separator or magnetization equipment, and leave it in it. After the magnetic field, some of the agglomerates remain, which accelerates the sedimentation of the particles.

The magnetic agglomeration phenomenon affects the classification efficiency in the classification operation of the grinding circuit, especially in the mechanical classifier. Therefore, the demagnetization equipment is demagnetized before the dry magnetic separation product is reground to destroy the magnetic agglomeration.

The fine-grained magnetite concentrate is demagnetized prior to filtration, which reduces the moisture of the filter cake and increases the productivity of the filter.

The formation of agglomerates of the magnetite particles of the dry magnetic separator through the magnetic field of the magnetic separator helps to obtain tailings with lower iron content, because the demagnetization coefficient of the agglomerates is smaller and the magnetic susceptibility is higher, and it is in the water. The resistance of the movement is smaller than that of the individual particles. For the quality of the concentrate, the formation of agglomerates hinders the separation of the continuum from the individual mineral particles.

In order to make the two magnetic susceptibility equal and the mineralization of the minerals with different Curie points, the magnetic separation of the dry magnetic separator can be carried out at an intermediate temperature, at which the magnetic properties of one mineral are significantly reduced, while the other is Still unchanged.