Polishing Drum Magnet (PDM) Model

Advanced Copper Cleaning for Ferrous Scrap Processing

The SGM Polishing Drum Magnet (PDM) is a specialized electromagnetic drum separator, engineered to reduce copper content in ferrous shred by efficiently removing electrical rotors with copper windings (“meatballs”). This patented technology enables scrap processors to significantly decrease manual sorting (pickers), improving overall efficiency and metal purity.

How the PDM Works:

The SGM PDM Model is an enhanced version of the Mega Drum Magnet, featuring a custom anodized aluminum strip winding that allows for precise direct current control, ensuring maximum accuracy in separating electrical rotors from ferrous scrap.

1. Initial Material Flow: Mixed ferrous scrap containing meatballs (copper-wound electrical rotors) enters the system.
2. Magnetic Separation: The PDM divides the ferrous flow into two distinct streams:
   1. Short Drop Flow: Concentrates meatballs and a minor amount of ferrous.
   2. Positive Flow: Retains most of the ferrous while minimizing copper contamination.
3. Copper Reduction Efficiency: Typical copper content in ferrous shred (~0.3%) is reduced to below 0.2%, ensuring higher-quality ferrous output.

Key Features & Benefits

• Layer windings generate stronger magneto-motive force, improving metal separation.

• Reduces copper contamination in ferrous scrap from 0.3% to <0.2%.
• Segregates ferrous scrap into two distinct flows, optimizing downstream processing.
• Constructed with a single machined billet shaft (no welding) for maximum strength.
• Features an outer replaceable layer for extended wear resistance.

• Allows precise orientation of magnet polarities for optimized performance.

Customizable Features 

• Conveyor Belt Feeding System – Ensures optimal material distribution into the PDM.
• Electronic Control Panel – Allows precise current management for consistent magnetic separation.

Processed Material