Products Description
High-strength drum shell for dry magnetic separation
The drum separator shell is the rotating cylindrical housing of a dry drum magnetic separator. It encloses the magnet assembly or magnetic material (e.g., ferrite or NdFeB elements) and supports continuous separation of ferrous tramp from bulk feed. As feed material flows across the rotating drum, non-magnetic particles fall away while ferrous (magnetic) metals adhere to the drum surface. When the shell carries the metal past the magnetic zone, the tramp iron is released for collection. Made from high-tensile S355 J2+N structural steel (a weldable low-carbon grade) and normalized, the shell offers superior strength, toughness and corrosion resistance. Precision forming and welding ensure minimal runout and tight tolerances. This robust separator drum enables efficient dry magnetic separation (dry magnetic separator) in mining applications, especially for iron ore processing. Dry drum separators reduce water use and are ideal for arid regions, providing long-lasting, reliable performance in harsh environments.
Key Components
Integrated structural components for drum stability
Drum
Main cylindrical shell housing the magnet assembly. Rotates to carry and release ferrous metal for separation.
Riding Ring
Welded ring on drum exterior to transfer weight to support rollers. Ensures stable rotation and proper alignment.
Fish Plate
Overlap plates joining drum shell segments. Reinforce and align welded seams at shell joints.
Drum Stiffener
Circumferential ribs on inner drum wall. Provide additional rigidity to resist hoop stress during rotation.
Gusset
Triangular gusset plates welded between drum and support frame. Strengthen the drum-to-frame connection and overall structure.
Flinger Ring
Peripheral ring at drum discharge end. Uses centrifugal force to fling captured magnetic particles off the drum after separation.
Stiffener
Longitudinal ribs inside drum. Maintain drum shape and reduce bending under axial loads or vibration.
Screw
High-strength bolts/screws. Securely fasten components (rings, stiffeners) and connect shell segments. Ensure tight assembly and structural integrity.
Technical Specifications
Precision dimensions for industrial magnetic drum shells
| Material Grade | S355 J2+N |
| Manufacturing Process | Plate rolling + full-penetration welding |
| Heat Treatment | Normalized or stress-relief annealed |
| Drum Length | 1000 – 6000 mm |
| Shell Wall Thickness | 20 – 60 mm |
| Outer Diameter | 1500 – 3500 mm |
| Radial Runout | ≤ 0.5 mm |
| Surface Roughness | ≤ Ra 3.2 μm |
| NDT Coverage | 100% UT + MPI on critical welds |
| Allowable Working Temperature | –20 °C to +120 °C |
Manufacturing & Engineering Design
- Plate Cutting
- Precision Rolling
- Automated Longitudinal & Circumferential Welding
- Stiffener / Riding Ring / Gusset Welding
- Stress-Relief Heat Treatment
- Critical Surface & Interface Machining
- Trial Assembly on Rollers
- Runout Verification & Final Inspection
Quality Control & Inspection
Multi-stage inspection ensuring long-term reliability
Material Mechanical Test
Verifies yield strength, tensile strength and impact toughness meet S355 J2+N requirements.
Chemical Analysis
Confirms elemental composition of steel (C, Mn, etc.) to ensure correct alloy makeup.
Magnetic Particle & Ultrasonic Testing
Detects surface and internal discontinuities or cracks in welded seams to prevent hidden defects.
Weld Inspection
Visual and/or radiographic examination of all welds to verify penetration, fusion and workmanship quality.
Heat Treatment
Documentation of the heat treatment cycle (temperatures, holding times) to ensure proper stress relief and hardness.
Runout Test
Measures drum cylindricity and concentricity to ensure low runout (≤0.5 mm), which is critical for smooth rotation.
Roughness Check
Verifies surface finish (≤Ra 3.2 μm) to prevent excessive wear of bearings and sealed components.
Dimensional Inspection
Full inspection of outer diameter, length, thickness and all critical dimensions against the engineering drawings.
Inspection Documentation Available
Complete traceable quality documentation
MATERIAL
REPORT
MAGNETIC PARTICLE INSPECTION
ULTRASONIC TESTING REPORT
HEAT TREATMENT GRAPHS
DIMENSIONAL REPORT
Packaging
All drum shells are coated with industrial-grade rust inhibitor and wrapped carefully before packing. Each shell is secured in a fumigation-free wooden crate customized to its dimensions. Inside the crate, timber blocking and foam padding prevent movement. The exterior crate is reinforced with steel straps and corner protectors. Desiccant packs and anti-corrosion papers are included to absorb moisture and prevent rust during transit. Packaging is tailored to the chosen transport mode (sea, rail or air) and complies with international shipping standards. Every detail is designed to safeguard the heavy separator drum shell for long-distance delivery.
Shipping
Professional global logistics for mining equipment
ZM Industry Co., Ltd. provides professional global shipping solutions. Depending on order size, we ship drum shells in standard 20GP or 40HQ containers, or via breakbulk for oversized units. We optimize route planning for reliability and cost-efficiency. Drum shells are lifted with cranes and securely fastened in containers with heavy-duty clamps and lashings. All customs documentation and certificates are prepared to expedite clearance. Our logistics team monitors the shipment status, ensuring timely delivery to customers in mining markets worldwide. With full traceability and insurance coverage, we guarantee your separator drums arrive safely at the project site.
Inquiry & Customization
Customized drum solutions from experienced engineers
We welcome inquiries for the drum separator shell and full separator assemblies. Our engineering team can customize dimensions, magnet configurations (ferrite or rare-earth), linings or coatings to meet your specific application. Whether you need a single separator drum or a complete magnetic drum separator system, ZM Industry offers tailored solutions. Contact us to discuss your project requirements. We will provide expert advice, 3D drawings and quotes. Let us partner with you to optimize your dry magnetic separation process and improve efficiency.
we are here for you
4#-1616, No.296 Liuquan Road, Zibo City, Shandong China/
208-7B, No.2 Penglai Road, Jianxi District, Luoyang City,henan Province,china
Hot Tags: drum separator, China drum separator manufacturers, suppliers, factory
