Basic Structure and Magnetic Field Characteristics of Wet Type Low Magnetic Field Permanent Magnetic Cylinder Magnetic Separator

    The structure of this magnetic separator is shown in the figure below.

    It mainly consists of three main parts: cylinder 1 , magnetic system 2 and bottom 3 (slot).
The cylinder is welded from a 2 to 3 mm stainless steel plate. Cast aluminum cover member is cylindrical, and is connected to the barrel with stainless steel screws. The stainless steel ( copper ) or aluminum is used as the cylinder because these materials are non-magnetic materials and have good magnetic permeability, so that the magnetic lines of force do not form a magnetic short circuit with the cylinder. The surface of the cylinder is also covered with a layer of wear-resistant rubber or a layer of thin copper wire as a protective layer to protect the cylinder surface from wear. At the same time, it is beneficial to the adhesion of magnetic ore particles on the cylinder surface, and strengthens the carrying effect of the cylinder on the magnetic ore particles, and the cylinder is driven to rotate by the motor.
In the figure, the magnetic system 2 is a three-pole permanent magnet magnetic system, and also has four or more poles. The polarities of the magnetic poles are alternately arranged in the direction of rotation of the cylinder, and are fixed during operation. When the magnetic ore particles are attracted to the surface of the cylinder and rotate with the cylinder, a magnetic flip (also called magnetic stirring) occurs due to the alternating polarity, and a part of the non-magnetic ore particles mechanically entrained in the magnetic ore particles Cleared out to improve the quality of magnetic products.
The figure below shows
the magnetic field characteristics of the CYT-600 × 1800 magnetic separator.

    It can be seen from the figure that the distribution of the magnetic field strength in the radial direction is saddle-shaped, and the further away from the cylinder surface, the smaller the magnetic field strength. The magnetic field strength at the edge of the magnetic pole on the surface of the cylinder is higher than that of the pole and the center between the center and the pole. It is 20 mm away from the surface of the cylinder. The magnetic field strengths of the other points are similar except for the two outermost points of the magnetic pole. The average magnetic field strength of the cylinder surface is about 200 kA/m.

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