Screens for electromagnetic separator

Abstract

Screens for an electromagnetic separator for separating iron powder contained in powder, the screens having increased iron powder collection efficiency which is obtained by increasing the area to which the iron powder is magnetically attracted and also by increasing the number of the screens to reduce the amount of iron powder which passes through the screens without being magnetically attracted to the outer peripheries of the screens. Screens for an electromagnetic separator are supported in multiple layers in the vertical direction within a tube which is disposed at the center of the electromagnet of the electromagnetic separator, and the screens consist of a magnetic material which magnetically attracts iron powder contained in powder supplied from the opening in the upper part of the tube. The screens (1) for an electromagnetic separator have formed at the center thereof circular through sections (3) through which a holding bar for holding the screens (1) pass, and the screens (1) also have ring frames (2) formed on the outer sides thereof. Each of the ring frames (2) has disposed therein a spiral plate (4) and a wave-like wave plate (5), the spiral plate (4) being spirally wound toward the through section with a gap between the turns, the wave-like wave plate (5) being disposed between the turns of the spiral plate (4). The crests and troughs of the wave plate (5) are affixed to the spiral plate (4).

Description

technical field [0001] The present invention relates to a screen for an electromagnetic separator that magnetically absorbs iron powder and is disposed on an electromagnetic separator that magnetically absorbs and separates and removes iron powder in powder. Background technique [0002] In the fields of food, chemistry, medicine, etc., in order to remove the iron powder in the powder, as an electromagnetic separator, it is known that a screen made of magnetic material is stacked in multiple layers in a cylinder arranged in an electromagnet, and the iron powder is separated from the upper part of the cylinder. A method in which the iron powder in the powder supplied through the opening is magnetically attracted to a magnetized screen and separated (Patent Document 1). [0003] Figure 4 It is a figure which shows an example of the electromagnetic separator using the conventional screen. Figure 4 In the hollow part of the cylindrical body 21 which is open at the upper end an...

AI Technical Summary

Problems solved by technology

[0009] In conventional sieves, the linear grids are formed in the shape of bamboo curtains, so the area for magnetically absorbing iron powder is small. In addition, since there are gaps in the outer periphery of the sieve, there are also powders that pass through without being magnetically attracted. In addition, in order to increase the magnetic flux density, the grid becomes thicker, and the number of multi-layer screens in the cylindrical body decreases, so there is a problem that the recovery rate of iron powder is low.

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