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Magnetic Separator

MoleDive Magnetic Separator - Professional Mining Equipment Manufacturer in China

In the process of crushing iron ore or other ores, the Magnetic Separator is used to separate mineral particles with a magnetic property that are below 3mm in size from non-magnetic ore or waste particles.

This is a commonly used technology in ore processing and ore beneficiation processes. It helps improve the ore’s grade by allowing valuable minerals to be recovered, and it plays a crucial role in enhancing resource utilization efficiency and environmental protection.

MoleDive is a professional manufacturer of mining equipment and Magnetic Separator equipment. The drum magnetic separator is an important mineral processing technology widely used in the mining and metallurgical industries.

Raw Materials

 Mine magnetic separator equipment

Magnetic rolls can be customized upon request

Easy to operate, many models, easy to maintain

MoleDive Magnetic Separator Related products

MoleDive Magnetic Separator Guide

Chapter 1:

Working Principle of Magnetic Separator

When the pulp flows into the tank after entering the ore box, under the action of the water flow from the ore-feeding pipe, the ore particles are in a loose state as they enter the ore-feeding area of the tank. Under the influence of the magnetic field, magnetic ore particles undergo magnetic agglomeration, forming “magnetic clusters” or “magnetic chains.” These “magnetic clusters” or “magnetic chains” are subjected to magnetic force in the pulp and move towards the magnetic pole, where they become attached to the surface of the cylinder. Since the polarities of the magnetic poles are alternately arranged along the direction of rotation of the cylinder and remain fixed during operation, the “magnetic clusters” or “magnetic chains” experience a stirring effect due to the alternating magnetic poles as the cylinder rotates. This causes non-magnetic minerals such as gangue to detach from the “magnetic clusters” or “magnetic chains” during the tumbling process, ultimately being attracted to the surface of the cylinder. These detached non-magnetic or weakly magnetic minerals are referred to as tailings. As the cylinder continues to rotate, the concentrate (ore) is discharged into the concentrate trough at the weakest point of the magnetic field at the edge of the magnetic system, aided by the flushing water flow from the ore-discharging pipe. If it is a full magnetic roller, the ore discharge is achieved using a brush roller. Non-magnetic or weakly magnetic minerals remain in the pulp and are discharged from the trough with the pulp, forming what is known as tailings.

1.1, Iron Ore Mining

In the process of iron ore mining, a magnetic separator is used to separate magnetic minerals from non-magnetic or weakly magnetic minerals in the mined ore. This separation is crucial for improving the ore’s quality and enhancing downstream processing efficiency. The working principle of a magnetic separator relies on exploiting the magnetic differences among various minerals. Magnetic minerals, such as iron ore, are attracted to the magnetic field and separated from non-magnetic or less magnetic minerals, which remain as tailings. This process aids in concentrating valuable iron ore, reducing waste, and increasing the overall yield of mining operations. In summary, a magnetic separator is a vital tool in the iron ore mining process, facilitating the extraction of high-quality iron ore for further processing and refining.

1.2, For iron removal operations on materials such as coal, non-metallic minerals, and construction materials

The role of a magnetic separator is to remove iron or iron-containing particles from materials such as coal, non-metallic minerals, and construction materials. Its function is to separate magnetic or iron-rich components from the rest of the material, ensuring that the final product is free from unwanted iron impurities. This is crucial for quality control and the performance of downstream processes.

Chapter 2:

How is ore beneficiation done today?

  1. Grinding Technology: Grinding is the process of crushing the ore into small particles, making it easier for subsequent separation and extraction.
  2. Gravity Separation: Utilizing differences in gravity to separate different minerals in the ore. This includes the use of shaking tables, centrifugal concentrators, and spiral separators.
  3. Flotation Technique: Flotation is a method that uses bubbles to separate valuable minerals from waste materials. It is particularly effective for processing fine-grained ores.
  4. Magnetic Separation: Using a magnetic field to separate magnetic minerals from non-magnetic ores. This method is commonly used for ores containing iron minerals.
  5. Chemical Processing: Chemical methods, such as cyanide leaching, can be employed to extract metals from ores.
  6. Bioleaching: Using microorganisms or plants to extract metals from ores, known as bioleaching techniques.
  7. Modern Computer Simulation: Utilizing computer simulation and modeling techniques to accurately predict the physical and chemical properties of ores, optimizing the extraction process.
  8. Environmental Technologies: Nowadays, environmentally friendly technologies are applied to ensure that ore processing does not cause irreversible damage to the environment.
Chapter 3:

The ore dressing equipment provided by MoleDive includes

MoleDive offers a comprehensive range of ore dressing equipment to enhance your mining operations. From the efficient ball mill for grinding to the crucial third-stage separation process, our selection includes a variety of magnetic separators (dry, multi-roll, wet, and roller), flotation machines, and classifiers. In addition, we provide essential feeding equipment like vibratory feeders, trough feeders, and pendulum feeders, along with key components such as agitation tanks, bucket elevators, belt conveyors, disc feeders, and high-efficiency concentrators. Our offerings also encompass ore washing machines, shaking tables, spiral chutes, hydraulic cyclones, jigging machines, tailings reclaimers, raw material mills, and MBS rod mills. For your specialized needs, we have rotary kilns and more. Trust MoleDive to deliver the ore dressing equipment you need for a successful mining operation. Our equipment is designed to optimize your processing efficiency and enhance resource recovery while maintaining a strong commitment to environmental responsibility.
Chapter 4:


MoleDive Magnetic Separator is a significant player in the ore processing and beneficiation industry, offering efficient solutions for separating magnetic minerals from non-magnetic ores. Whether it’s iron ore mining or iron removal operations on materials such as coal, non-metallic minerals, and construction materials, our magnetic separators excel in improving ore quality and overall processing efficiency. Our equipment is characterized by its wide applicability, high level of automation, user-friendliness, and environmental consciousness. We provide a range of magnetic separator models, including concurrent, counter-current, and semi-counter-current types, to meet diverse process requirements. Furthermore, our equipment finds applications not only in ore processing but also in industries such as ceramics, coal-fired power plants, foundry sand, and refractory materials. MoleDive takes pride in offering comprehensive ore dressing equipment, including grinding technology, gravity separation, flotation techniques, and magnetic separation. From ball mills to flotation machines, classifiers to feeding equipment, and much more, we provide a complete suite of tools to optimize your mining operations. Choose MoleDive, and you’ll gain access to efficient and environmentally responsible ore dressing equipment, designed to enhance resource utilization while safeguarding the environment. Your success in the mining industry is our top priority.

1. what is magnetic separation?

Magnetic separation is a process used to separate magnetic materials from non-magnetic ones. It relies on the magnetic properties of certain materials and is commonly used in various industries for tasks such as:

  • Mineral Processing: In the mining industry, magnetic separation is employed to extract valuable minerals from ore. Magnetic separators can separate magnetic minerals (e.g., iron ore) from non-magnetic minerals, improving ore quality.
  • Iron Removal: Magnetic separation is used to remove iron or iron-containing particles from materials such as coal, non-metallic minerals, and construction materials. This ensures that the final product is free from unwanted iron impurities.
  • Recycling: Magnetic separation is crucial in recycling processes. It helps separate ferrous metals (those containing iron) from non-ferrous materials, making recycling more efficient.
  • Waste Water Treatment: Magnetic separation is used to remove magnetic particles from wastewater, ensuring cleaner water discharge.

The process involves placing the material to be separated into a magnetic field. Materials with magnetic properties will be attracted to the magnetic field and separated from non-magnetic materials. This separation is essential for improving product quality, reducing waste, and enhancing the efficiency of various industrial processes.

2. how does a magnetic drum separator work?

A magnetic drum separator, also known as a drum magnet, is a type of magnetic separator used in various industries to separate magnetic materials from non-magnetic materials. It works on the principle of using a rotating drum with a magnetic field to attract and separate magnetic particles from the rest of the material. Here’s how it works:

  1. Material Feeding: The material to be processed is fed onto the rotating drum’s surface. This material can be a mixture of magnetic and non-magnetic particles, such as ore, waste, or any other substance that needs separation.
  2. Magnetic Field Generation: Inside the drum, there are powerful magnets or magnetic elements arranged around its circumference. These magnets generate a strong magnetic field within the drum.
  3. Magnetic Attraction: As the material flows over the surface of the rotating drum, any magnetic or magnetized particles within the material are attracted to the surface of the drum due to the magnetic field. These particles adhere to the drum’s surface as it rotates.
  4. Separation: The non-magnetic particles, which lack magnetic properties, do not adhere to the drum’s surface and continue moving along the material flow, eventually falling off the drum and into a separate discharge area. These non-magnetic particles are often referred to as tailings.
  5. Cleaning: Over time, the magnetic particles accumulate on the drum’s surface. To ensure efficient separation, a scraper or a cleaning mechanism removes the magnetic particles from the drum’s surface, typically at a designated discharge point. This collected material is referred to as the concentrate or the product.
  6. Repeat Process: The process of material feeding, magnetic attraction, separation, and cleaning continues as long as material is being fed onto the drum. This ensures a continuous separation of magnetic and non-magnetic particles.

Magnetic drum separators are commonly used in industries such as mining, recycling, and bulk material handling. They are effective for separating ferrous (magnetic) materials from non-ferrous materials, improving product quality, and reducing waste. The specific design and configuration of the drum, along with the strength of the magnetic field, can be tailored to suit the particular requirements of the application.

3. Why use magnetic separator?

Magnetic separators are used in various industries and applications for several important reasons:

  • Separation of Magnetic Materials: The primary purpose of a magnetic separator is to separate materials with magnetic properties from those that are non-magnetic or have weaker magnetic properties. This is essential in industries where the presence of magnetic contaminants can impact product quality or processing efficiency.
  • Quality Improvement: Magnetic separators help improve the quality of end products by removing unwanted magnetic impurities. For example, in the food and pharmaceutical industries, they can remove tiny iron or steel particles that might otherwise contaminate the product.
  • Protection of Equipment: Magnetic separators prevent damage to downstream processing equipment. In industries like mining and recycling, where crushers, pulverizers, and conveyor belts are used, removing magnetic contaminants before these machines can reduce wear and tear, maintenance costs, and downtime.
  • Resource Recovery: Magnetic separators are used to recover valuable materials from waste streams. In recycling facilities, they can extract ferrous metals (e.g., steel and iron) from mixed waste, allowing for recycling and reducing landfill waste.
  • Enhanced Productivity: Separating magnetic materials from non-magnetic ones can improve processing efficiency. In mineral processing and ore beneficiation, for instance, magnetic separators help concentrate valuable minerals, reducing the amount of material that needs to be processed.
  • Environmental Protection: By removing magnetic impurities, magnetic separators contribute to environmental protection by reducing contamination and waste. They can also help in preventing equipment wear, which can lead to environmental leaks or spills.
  • Customization: Magnetic separators can be tailored to specific applications, ensuring they meet the unique requirements of different industries and processes. They are available in various configurations, including drum magnets, magnetic pulleys, grate magnets, and more.
  • Automation: Many modern magnetic separators come with automated control systems, making them easy to operate and maintain. This reduces the need for manual intervention, enhancing overall process efficiency.

In summary, the use of magnetic separators is critical in multiple industries and applications for improving product quality, protecting equipment, recovering valuable resources, enhancing productivity, and promoting environmental responsibility. Their versatility and adaptability make them a valuable tool in various industrial processes.

4. What are magnetic separators used in?

Magnetic separators are used in a wide range of industries and applications, including mining, mineral processing, coal handling, recycling, food processing, pharmaceuticals, ceramics, and more. They are employed to separate magnetic materials from non-magnetic substances and remove unwanted iron impurities from various materials.

5. What equipment do you need for magnetic separation?

Magnetic Separator: This is the primary equipment responsible for generating a magnetic field to attract and separate magnetic particles from non-magnetic materials. Various types of magnetic separators are available, including drum magnetic separators, roll-type magnetic separators, and more.

  • Conveyor Belt or Vibratory Feeder: These components are used to feed materials onto the magnetic separator’s surface, ensuring even distribution and efficient separation.
  • Discharge Chute or Conveyor: After magnetic separation, the separated magnetic and non-magnetic materials need to be directed to different collection points. A discharge chute or conveyor helps in this process.
  • Control System: Many modern magnetic separators come equipped with automated control systems for precise operation, control of magnetic intensity, and monitoring of the separation process.
  • Magnet or Magnetic System: This is the core component that generates the magnetic field. It’s typically made from high-quality magnetic materials like rare earth magnets or ferrite magnets.
  • Magnetic Drum or Roll: Depending on the separator type, you may have a magnetic drum or roll where the separation occurs.

These components work together to ensure effective magnetic separation in various industries and applications. The specific equipment and configuration can vary depending on the material being processed and the desired outcome of the separation process.

6. What kind of impurities can be removed using magnetic separator?

A magnetic separator can effectively remove various impurities that are either magnetic or contain magnetic components. Some common impurities that can be removed using a magnetic separator include:

  • Steel Contaminants: Magnetic separators can efficiently remove steel particles from materials, making them crucial in industries such as mining, recycling, and food processing.
  • Ferrous Metals: These metals contain iron, such as iron shavings, steel fragments, and ferrous alloys.
  • Magnetic Minerals: Magnetic separators are used to extract valuable magnetic minerals, such as magnetite, hematite, and ilmenite, from ores or mineral mixtures.
  • Metal Contaminants: Any metallic impurity with magnetic properties can be effectively eliminated, ensuring product purity.
  • Magnetic Particles in Liquids: Magnetic separators are also used to remove magnetic particles from liquids, ensuring clean and pure liquids for various industries, including wastewater treatment.
  • Magnetic Impurities in Bulk Materials: Industries like agriculture, mining, and construction use magnetic separators to remove magnetic impurities from bulk materials such as grains, minerals, and aggregates.

The effectiveness of a magnetic separator in removing these impurities depends on factors like the impurity’s magnetic properties, the type of magnetic separator used, and the specific application. Magnetic separators are versatile tools used in multiple industries to enhance product quality, reduce waste, and ensure product safety.