Overview of Grate Magnets

Grate magnets, often referred to as magnetic grates, are specialized magnetic separation assemblies designed to extract fine ferrous contaminants from free-flowing dry materials. By integrating high-intensity tube magnets within a rigid stainless steel framework, these units are engineered to be positioned directly within the material stream to intercept debris at critical processing points.

These separators are typically installed within conical hoppers, vertical chutes, or floor openings to protect downstream equipment and ensure product purity. The grid-like arrangement is intentionally designed to force the material to cascade through the concentrated magnetic fields, maximizing the interaction between the particles and the tube magnets. This configuration allows for the capture of fine metal dust and microscopic particles that standard external separators may fail to intercept.

Grate Magnets

Grate magnets are a primary solution for processing granular products, including plastic pellets, sugar, and grains. When positioned at the base of machine bins, they are frequently identified as hopper magnets, and they also serve as the essential modular components for more complex multi-row drawer magnets.

Standard Geometric Configurations of Grate Magnets

To facilitate seamless integration into diverse processing infrastructures, grate magnets are engineered in two primary geometric configurations. Both round and rectangular profiles are manufactured to specific dimensional tolerances, ensuring that the magnetic field is strategically positioned within the material flow path to maximize separation efficiency. The selection of a specific geometry is determined by the cross-sectional profile of the installation point and the specific flow characteristics of the material being processed.

Round Configuration

  • Target Applications: Specifically optimized for circular conical hoppers, silos, and discharge funnels.

  • Edge-to-Edge Coverage: Custom-manufactured diameters ensure the active separation zone covers the entire throat of the hopper, preventing material bypass.

  • Operational Stability: Designed to sit securely within the vessel, maintaining precise alignment even under heavy material weight.

Grate Magnets Performance Fe vs. Non-Fe Separation

Square & Rectangular Configuration

  • Universal Compatibility: Encompasses all square and rectangular dimensions for integration into vertical chutes, hand-dump stations, and floor openings.

  • Modular Utility: Ideally suited as the primary magnetic matrix within drawer-in-housing units or as standalone protective grids.

  • Structural Integrity: Features a heavy-duty, rigidly welded framework designed to withstand static and dynamic loads during bulk material handling.

Engineering Enhancements for Grate Magnets

Beyond basic geometric configurations, we offer specialized engineering enhancements to optimize the performance and maintainability of these separators.

  • Easy-Clean System (Sleeve Technology): Designed to replace time-consuming manual wiping, this “tube-within-a-tube” configuration encases the magnetic cores within stainless steel sleeves, allowing captured ferrous particles to fall off instantly when the internal tube magnets are withdrawn from the framework.

  • Flow Deflectors (Baffles): Both round and rectangular types can be equipped with optional deflectors to redirect the material stream directly onto the tube magnets, eliminating “dead zones”.

  • Multi-Layer Matrices: Both configurations support multi-row, staggered arrangements to increase the probability of contaminant interception in high-volume lines.

  • Precision Mounting: All units include side support bars or specialized frames to facilitate a simple “drop-in” installation into existing ductwork.

Specifications of Grate Magnets

Beyond specialized engineering for unique hopper and chute geometries, a comprehensive range of standard dimensional specifications is maintained to ensure seamless integration into most conventional industrial processing lines.

Round Type
Round Type Grate Magnets-Drawing
Item No. Dimension (mm) Qty. of Tube Magnets Unit Weight

(kg)
D H
100 100 40 2 1.0
150 150 40 3 2.2
200 200 40 4 3.7
250 250 40 5 5.5
300 300 40 6 8.0
350 350 40 7 10.0
400 400 40 8 13.5
450 450 40 9 17.0
500 500 40 10 20.5
Square & Rectangular Type
Square & Rectangular Type Grate Magnets-Drawing
Item No. Dimension (mm) Qty. of Tube Magnets Unit Weight

(kg)
A B H
100 100 100 40 2 1.0
150 150 150 40 3 2.2
200 200 200 40 4 3.7
250 250 250 40 5 5.5
300 300 300 40 6 8.0
350 350 350 40 7 10.0
400 400 400 40 8 13.5
450 450 450 40 9 17.0
500 500 500 40 10 20.5

Custom Engineering for Process Integrity

Standard off-the-shelf sizes often result in unprotected bypass zones where fine ferrous contaminants can evade capture. To ensure absolute product purity and downstream equipment safety, we provide bespoke manufacturing services to align our magnetic grates with your specific machinery profiles.

  • Versatile Configurations: Our engineering team develops magnetic solutions ranging from simplified single-row designs to high-density dual-bank matrices, depending on your material flow volume and contamination levels.

  • Precision Geometric Fit: Every unit is engineered to match your exact interface dimensions—regardless of whether the opening is circular, rectangular, or an irregular geometry. This precision-fit approach ensures zero-leakage performance across the entire material stream.