electromagnetic separator dry type
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Half Drum Magnetic Separator with Housing,

Half Magnetic Drum Separator with Housing for Dry Bulk Materials

Half magnetic drum separator (partial magnetic drum with outer housing) delivers superior ferrous separation efficiency for dry granular material processing. Unlike full drum designs, our semi-magnetic drum with enclosed housing concentrates magnetic force in a 120°-180° active arc, achieving deeper magnetic field penetration and stronger iron capture from dry bulk solids.

The stationary magnetic assembly inside the rotating stainless steel shell ensures zero demagnetization risk, while the protective outer housing prevents material spillage and environmental contamination. Ideal for mining, recycling, aggregates, and food-grade applications requiring reliable tramp iron removal.

Application Scope:

Our drum magnetic separators for dry and granular materials are ideal for:

  • Mining and Quarrying: Remove iron from granular ores and aggregates.

  • Recycling Plants: Efficiently separate scrap metal from dry granular material streams.

  • Aggregate Handling: Protect crushers, conveyors, and other equipment while ensuring product purity.

  • Food and Biomass Processing: Safeguard granular products such as pellets, grains, and biomass from ferrous contamination.

  • Fertilizer Production: Maintain high-quality granular fertilizer free from iron particles.

Overview

The Half Drum Magnetic Separator with Housing, also known as a Drum Half Magnetic Separator, is specially designed for dry and granular materials, providing efficient removal of ferrous contaminants from bulk solids. Using high-intensity permanent magnets, it separates tramp iron and other ferrous particles from material streams, protecting downstream equipment, improving product quality, and ensuring smooth, continuous production.

How Half Magnetic Drum Separator Works

  1. Material Feed: Dry granular material flows onto conveyor belt, forming uniform layer approaching the drum.
  2. Magnetic Attraction Zone (6-12 o’clock): As material passes over the half magnetic drum, ferrous particles enter the concentrated magnetic field at the top arc and instantly adhere to rotating stainless steel shell.
  3. Non-Magnetic Discharge: Clean, iron-free material continues over drum surface and discharges normally at conveyor trajectory.
  4. Ferrous Transport: Captured iron rotates with drum shell through the non-magnetic zone (180°-360° position where no magnets exist).
  5. Automatic Discharge: At approximately 4-5 o’clock position, ferrous particles lose magnetic attraction and fall into enclosed collection chute—no power or manual intervention required.

Key Advantage: The stationary internal magnet assembly never rotates, ensuring permanent magnetic strength retention and eliminating mechanical wear on magnetic components.

Half Magnetic Drum vs Full Magnetic Drum: Structural Advantages

Feature Half Magnetic Drum + Housing Full Magnetic Drum
Magnetic Field Distribution Concentrated 120°-180° active arc 360° weak uniform field
Magnetic Penetration Depth 50-80mm (stronger field) 20-40mm
Magnet Retention Stationary assembly, no centrifugal loss Rotating magnets, adhesion risk
Material Containment Enclosed housing prevents spillage Open drum, dust exposure
Maintenance Access Side-opening housing design Full drum disassembly required
Energy Efficiency No power needed (permanent magnet) Same

Why Semi-Magnetic Drum Design Performs Better

The half magnetic drum separator structure positions high-intensity rare earth magnets in a fixed internal assembly, with only the stainless steel shell rotating. This creates three critical advantages:

  1. Stronger Magnetic Capture Zone: Magnetic force concentrates at 6-12 o’clock position where material contacts drum surface, rather than dissipating around full circumference.
  2. Zero Magnet Detachment Risk: Stationary magnet assembly eliminates centrifugal force on magnets during high-speed rotation (up to 4m/s belt speed).
  3. Complete Process Enclosure: The outer housing contains dust, prevents material loss, and enables sealed operation for environmental compliance.

Key Features

  1. Permanent Magnet Technology
    The permanent magnet drum separator captures iron and ferrous particles from dry or granular materials without requiring external power, reducing operating costs while maintaining high separation efficiency.

  2. Customizable for Dry Material Handling
    These industrial drum magnetic separators can be tailored to your conveyor width, pulley diameter, material type, and flow rate, ensuring optimal performance for dry bulk materials.

  3. Self-Cleaning Options
    Some models include self-cleaning mechanisms, automatically ejecting captured metal into a collection bin, reducing downtime and maintenance requirements.

  4. High-Intensity Rare Earth Magnets
    Equipped with rare earth magnets, our drum separators can remove even fine iron particles from granular materials, providing high separation efficiency and consistent product quality.

  5. Versatile Applications for Dry Materials
    Optimized for granular ores, aggregates, pellets, grains, and biomass, these separators are ideal for industrial processes where ferrous contamination is a concern.


Half Magnetic Drum Separator Technical Specifications

Magnetic System

Magnetic Configuration Semi-magnetic drum (partial arc)
Active Magnetic Arc 120° / 150° / 180° (customizable)
Magnet Type Stationary NdFeB rare earth or ferrite
Magnetic Strength 3000-14000 Gauss at drum surface
Field Depth 50-100mm into material layer

Drum & Housing

Drum Construction Rotating stainless steel 304/316 shell
Shell Thickness 3-5mm (wear-resistant options)
Housing Material Carbon steel with powder coating / Stainless steel
Housing Design Fully enclosed with inspection doors
Sealing Dust-tight labyrinth seals
Discharge Chute Integrated ferrous collection hopper

Performance Parameters

Belt Width Compatibility 400mm – 2000mm
Drum Diameter 200mm – 500mm (semi-magnetic type)
Maximum Belt Speed 4.0 m/s
Material Layer Depth Up to 100mm (depending on magnet strength)
Cleaning Method Self-cleaning (scraper) / Manual (inspection doors)

Advantages

  • Efficient Ferrous Removal: Protects equipment and improves material purity.

  • Optimized for Dry and Granular Materials: Designed for bulk solids, pellets, and granular ores.

  • Energy Efficient: Permanent magnet operation requires no electricity.

  • Customizable and Scalable: Suitable for various conveyor systems and material types.

  • Low Maintenance: Optional self-cleaning design reduces labor requirements.


Technical Specifications

  • Magnet Type: Rare earth or ferrite

  • Belt Width Compatibility: 400mm – 2000mm (custom sizes available)

  • Pulley Diameter: 200mm – 800mm (tailored to requirement)

  • Material Construction: High-strength steel drum with wear-resistant coating

  • Operation: Self-cleaning or manual cleaning options

  • Applications: Dry granular materials in mining, recycling, aggregates, food, biomass, and fertilizer production

FAQ – Drum Magnetic Separator for Dry and Granular Materials

Q1: What is a half magnetic drum separator and how is it different from full drum design?

A half magnetic drum separator features a stationary magnetic assembly inside a rotating stainless steel shell, with magnets covering only 120°-180° of the circumference (not 360°). This semi-magnetic structure concentrates magnetic force in the active separation zone, achieving 2-3x stronger field penetration than full drum designs. The outer housing fully encloses the drum for dust containment and safety.

Q2: Which types of materials can be processed?

A: This separator is suitable for dry and granular materials such as ores, aggregates, pellets, grains, and biomass. It is not designed for liquid or slurry applications.

Q3: Can the drum magnetic separator be customized?

A: Yes. We can tailor the drum size, magnet strength, conveyor width compatibility, and design features to meet the specific needs of your material and production process.

Q4: Does it have a self-cleaning feature?

A: Some models include a self-cleaning mechanism that automatically ejects collected metal into a bin, reducing manual maintenance and allowing continuous operation.

Q5: What types of magnets are used in these separators?

A: Our separators use either rare earth magnets for high-intensity separation or ferrite magnets for standard applications. Rare earth magnets are more effective at capturing fine iron particles.

Q6: How do I select the right separator for my conveyor system?

A: Consider factors like material type, granule size, conveyor width, pulley diameter, and whether self-cleaning is needed. Correct sizing ensures efficient separation and minimal equipment wear.

Q7: Can it improve production efficiency?

A: Yes. By removing ferrous contaminants efficiently, it prevents equipment damage, reduces downtime, and maintains continuous production flow, improving overall operational efficiency.

Q8: Are there complementary products available?

A: Yes. Related equipment includes plate magnetic separators, suspended magnetic separators, magnetic head pulleys, and magnet testers to provide complete solutions for ferrous contamination in dry and granular materials.

Q9: Why choose half magnetic drum instead of full magnetic drum?

Half magnetic drum separators provide:

  • Stronger magnetic field in active zone (deeper penetration into material bed)
  • Zero risk of magnet detachment from centrifugal force
  • Enclosed housing for environmental and safety compliance
  • Easier maintenance access via side doors without drum removal
  • Lower weight and installation cost for equivalent separation performance

Q10: What is the purpose of the outer housing?

The enclosed housing serves multiple functions: (1) contains dust and prevents material spillage, (2) provides safety barrier around rotating drum, (3) enables negative pressure connection for dust collection systems, (4) includes inspection/maintenance access doors, and (5) directs ferrous discharge into sealed collection container.

Q11: Can the magnetic arc angle be customized?

Yes. We offer 120°, 150°, and 180° magnetic arc configurations depending on your material characteristics and separation requirements. Larger arc angles suit slower belt speeds and deeper material layers; smaller arcs work for high-speed conveyors with shallow beds.


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Conclusion

The Drum Magnetic Separator for Dry and Granular Materials is a reliable solution for industrial operations requiring efficient ferrous metal removal. Its combination of high-intensity permanent magnets, customizable design, and optional self-cleaning features ensures continuous operation, protects machinery, and maintains high product quality.

Install a drum magnetic separator today to optimize your dry and granular material processing, reduce maintenance costs, and enhance operational efficiency.

Specifications  of Electric Drum Magnetic Separator
Model Dimensions (mm) Weight (kg) Power (kW)
Dia. A B D W C H
MHD2130 215 420 450 280 290 500 105 0.25
MHD2135 215 470 450 330 290 500 115 0.25
MHD2140 215 520 450 380 290 500 125 0.25
MHD2145 215 570 450 430 290 500 135 0.25
MHD2150 215 620 450 480 290 500 145 0.25
MHD2160 215 720 450 580 290 500 175 0.25
MHD2170 215 820 450 680 290 500 195 0.25
MHD2180 215 920 450 780 290 500 215 0.25
MHD2190 215 1020 450 880 290 500 225 0.37
MHD2110 215 1120 450 980 290 500 245 0.37
MHD3130 315 420 550 280 360 650 218 0.25
MHD3135 315 470 550 330 360 650 235 0.25
MHD3140 315 520 550 380 360 650 252 0.25
MHD3145 315 570 550 430 360 650 269 0.25
MHD3150 315 620 550 480 360 650 286 0.25
MHD3160 315 720 550 580 360 650 320 0.25
MHD3170 315 820 550 680 360 650 354 0.37
MHD3180 315 920 550 780 360 650 388 0.37
MHD3190 315 1020 550 880 360 650 422 0.37
MHD3110 315 1120 550 980 360 650 456 0.55
MHD3111 315 1220 550 1080 360 650 490 0.55
MHD4030 400 420 635 280 435 800 288 0.37
MHD4035 400 470 635 330 435 800 314 0.37
MHD4040 400 520 635 380 435 800 340 0.37
MHD4045 400 570 635 430 435 800 366 0.55
MHD4050 400 620 635 480 435 800 392 0.55
MHD4060 400 720 635 580 435 800 444 0.55
MHD4070 400 820 635 680 435 800 496 0.55
MHD4080 400 920 635 780 435 800 548 0.55
MHD4090 400 1020 635 880 435 800 600 0.55
MHD4010 400 1120 635 980 435 800 652 0.75
MHD4011 400 1220 635 1080 435 800 704 0.75
MHD4012 400 1320 635 1180 435 800 756 0.75

 

Powerful Half Magnetic Drum Separator sketch1Powerful Half Magnetic Drum Separator sketch 2