Why Can't Iron Enter the Eddy Current Sorting Machine?

Why should iron be removed when using the eddy current separator? Does iron have any effect on the eddy current separator or will it damage the machine?

Ⅰ. The principle of the eddy current sorting machine

The principle of the eddy current sorting machine is a sorting technology that uses the conductivity of each substance and the difference in the magnetic induction intensity generated. Its sorting principle is to use a magnetic drum composed of permanent magnets to rotate at high speed to generate an alternating magnetic field. When a metal with electrical conductivity properties passes through the magnetic field, an eddy current is induced in the metal.

The eddy current itself will produce an alternating magnetic field, which is opposite to the direction of the magnetic field generated by the rotation of the magnetic system drum. Non-ferrous metals (such as aluminum, copper, etc.) will jump out along the conveying direction due to the opposite effect, and thus separate from other non-metallic materials such as glass and plastics to achieve the purpose of sorting.

Ⅱ. Why can't iron enter the eddy current sorting machine?

1. An eddy current reaction occurs between the eddy current separator and the iron-containing material, resulting in high temperature inside the iron element. After a large amount of continuous iron feeding for a long time, the high temperature generated inside the iron will burn the conveyor belt on the surface of the eddy current sorting drum, and cause different degrees of damage to the magnetic wheel of the eddy current sorting machine. High temperatures above 200 degrees will cause the magnetic wheel of the eddy current separator to attenuate and demagnetize.

2. After the large iron pieces enter the eddy current separator equipment, the broken iron pieces will scratch the belt. After entering the equipment, the eddy current reaction will occur and the protective drum outside the drum will be burned. A small amount of iron materials can be sorted out by the eddy current sorting machine without causing damage to the equipment.

3. Iron removal and protective measures of eddy current sorter

When using a strong magnetic field eddy current separator, it is necessary to remove iron from the passing materials first. A strong magnetic drum separator or other types of strong magnetic separators can be installed before the feed belt of the eddy current separator to remove the iron element in the material. In daily use, it is necessary to remove the baffles on both sides of the eddy current separator, and observe whether there are debris inside the belt inside the vortex separator from time to time, and clean debris, iron filings and other materials in time to prevent damage to the equipment .

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