Choosing the Right Overband Magnetic Separator for the Aggregate and Mining Industry

AKSA MAGNET
Jan 15
2 min read

In the aggregate, mining, and minerals industries, permanent magnetic or electromagnetic overband magnetic equipment is used to protect crushers, screens, and conveyors from damage caused by unwanted ferrous metal. However, there is no one-size-fits-all solution for every operation.

There are various permanent and electromagnetic overband magnetic separator models designed for specific applications. To select the appropriate magnet, a detailed understanding of the installation is critically important. Aksa Magnet has designed a wide range of overband magnetic separators suitable for different applications to meet customers’ specific needs.

A Powerful Partner in Efficiency

In the early 1990s, Aksa Magnet marked a significant milestone in industrial innovation by developing and manufacturing Turkey’s first permanent and electromagnetic overband separators. Since then, thousands of these advanced-technology units have been supplied to operations worldwide. While the fundamental principles have remained the same, continuous advancements in magnet materials and manufacturing methodologies have significantly increased efficiency in separating ferrous metals.

Overband Magnetic Separators are indispensable equipment that remove and clean unwanted ferrous metal pieces from material extracted from mines or quarries. Manufactured with either permanent or electromagnetic magnet designs, these units consist of a powerful magnet block, a robust frame, two or four pulleys, and a rotating self-cleaning rubber belt.

Operating principle: As the conveyed mining or quarry material passes beneath the overband magnetic separator, the magnetic system attracts, lifts, and removes unwanted ferrous metal pieces from the process. Whether a permanent magnet or an electromagnetic system is used depends on conveyor width, material depth, and the characteristics of the tramp metal.

Overband Magnetic Separator Models and Applications

Oil-Cooled Electromagnetic Overband Magnetic Separator

This is the most powerful ferromagnetic metal separation solution in Aksa Magnet’s product range. Its high magnetic strength allows operation at greater distances and under heavier loads. It is ideal for deep-troughed conveyors in recycling plants. It can be installed directly over conveyor belts or aligned above head pulleys, depending on process requirements.

Air-Cooled Electromagnetic Overband Separator

This model offers a powerful magnetic separation solution with reduced maintenance requirements. Compared to oil-cooled models, the air-cooled system requires less maintenance while effectively capturing unwanted ferrous metal pieces thanks to its high electromagnetic field strength.

Permanent Overband Magnetic Separator

This overband magnetic separator model is equipped with permanent magnets designed using Aksa Magnet’s latest magnetic technologies. Its special magnetic configuration enables multi-pole designs. It effectively captures unwanted ferromagnetic pieces and removes them from the process.

Selecting the Right Overband Magnetic Separator

When selecting the right overband magnetic separator, the choice between a permanent magnet and an electromagnetic system depends on the specific application. Aksa Magnet’s process engineers determine the most suitable magnet by evaluating the following factors:

Purpose of ferrous metal separation (e.g., protecting plant equipment)
Characteristics of the unwanted ferrous metal (shape, size, etc.)
Properties of the material conveyed on the conveyor (size range, burden depth, etc.)

By considering these criteria, the most appropriate overband magnetic separator is selected for each application.

Aksa Magnet continues to provide innovative magnetic separation solutions for mining and quarry operations with 35 years of experience and a strong commitment to customized solutions.