Magnetic separator Working principle

Preface: Magnetic separator is an important mineral processing equipment. Its working principle is mainly based on the difference in the response of different substances in ore or mixture to the magnetic field. Specifically, the working principle of magnetic separator can be summarized as follows:

Magnetic Separator

1. Magnetic field generation

A strong magnetic field is generated inside the magnetic separator by permanent magnets or electromagnets. Permanent magnet magnetic separators use magnetic poles made of permanent magnetic materials to generate a constant magnetic field. This magnetic field is stable and lasting, and is suitable for occasions where the magnetic field strength is relatively stable. Electromagnetic magnetic separators generate adjustable magnetic fields by energizing, and their magnetic field strength can be changed by adjusting the magnitude and direction of the current to meet the magnetic separation needs of different materials.

2. Ore pretreatment

The ore to be treated first undergoes pretreatment processes such as crushing and grinding to reduce its particle size and increase its surface area. This step is conducive to the separation of magnetic substances and improves the efficiency of magnetic separation.

Magnetic Separator

3. Ore enters the magnetic field

The pretreated ore enters the magnetic field area of the magnetic separator through a conveying device. Under the action of the magnetic field, different substances in the ore will exhibit different magnetic behaviors.

4. Separation of magnetic materials

Under the action of the magnetic field, the magnetic material will be attracted by the magnetic force, move along the direction of the magnetic field, and be collected by the magnetic drum, magnetic plate, disk or magnetic roller of the magnetic separator. These parts are usually made of stainless steel or strong magnetic materials to ensure sufficient magnetic force and wear resistance. As these parts rotate or move, the magnetic material is taken out of the magnetic field area and separated from the non-magnetic material.

5. Discharge of non-magnetic materials

At the same time, the non-magnetic material is not affected by the magnetic force, continues to move along the direction of movement of the conveying device, and is discharged from the magnetic field area. In this way, the magnetic material and the non-magnetic material are effectively separated.

Magnetic Separator

6. Classification and characteristics of magnetic separators

According to the strength of the magnetic field, the type of magnetic medium, the working medium and the structural characteristics, magnetic separators can be divided into many types, such as dry magnetic separators, wet magnetic separators, permanent magnetic separators, electromagnetic magnetic separators, etc. Different types of magnetic separators have different characteristics and application ranges. For example, dry magnetic separators are suitable for processing dry materials with larger particle sizes; wet magnetic separators are suitable for processing materials with higher water content; permanent magnetic separators have the advantages of simple structure and convenient maintenance; electromagnetic magnetic separators have the advantages of adjustable magnetic field and strong adaptability.

PS: The working principle of the magnetic separator is based on the difference in the response of different substances in the ore or mixture to the magnetic field, and the separation of magnetic substances from non-magnetic substances is achieved under the action of the magnetic field. Magnetic separators have various types and characteristics, suitable for the magnetic separation needs of different industries and materials. With the advancement of science and technology and the continuous development of magnetic separation technology, the performance and application range of magnetic separators are also expanding.

Author:Fiona Fan

Fiona Fan is a contributor to the blog and news column of the Zhongcheng Machinery website. She has several years of work experience in the machinery industry, has a deep understanding of crushing machinery and screening equipment, and shares useful knowledge about environmental protection machinery.