Metal Recovery from E-Waste: How Magnetic and Eddy Current Separation Works
Why Metal Recovery Matters in E-Waste Recycling
Electronic waste, commonly known as e-waste (and as waste electrical and electronic equipment, or WEEE, in the UK and EU), is one of the fastest-growing waste streams in the world. The Global E-waste Monitor 2024 estimates that the world generated 62 million tonnes of e-waste in 2022, including around 31 million tonnes of metals, yet only 22.3% was documented as formally collected and recycled.
E-waste ranges from discarded computers and mobile phones to consumer electronics, household appliances and industrial equipment. While plastics and other materials can be recovered, the true value often lies within the metals. Ferrous metals, aluminium, copper, stainless steel and other non-ferrous metals can all be extracted and returned to the manufacturing supply chain, and as demand for recycled raw materials increases, efficient metal recovery has become a critical objective for modern e-waste recycling facilities.
Recovering metals from e-waste offers significant environmental and economic benefits, including:
- Reducing reliance on virgin mined resources
- Lowering energy consumption compared with primary metal production
- Diverting valuable materials from landfill
- Supporting circular economy initiatives
- Increasing the profitability of recycling operations
What metals can be recovered from e-waste?
Ferrous metals (iron and steel) and non-ferrous metals, including aluminium, copper, brass, zinc and stainless steel, can all be recovered from shredded e-waste. After shredding, an e-waste stream typically contains:
Ferrous metals
Aluminium
Copper
Brass
Stainless steel
Insulated copper wire
Printed circuit board fragments
Plastics and polymers
Fine mixed fractions
For a deeper explanation of the two main categories, see our guide to ferrous vs non-ferrous metals and why the difference matters for recycling.
Why is it difficult to separate metals from e-waste?
Shredded electronic scrap is a complex mixture of metals, plastics, rubber, glass and composite materials. These materials vary significantly in size, density, conductivity and magnetic properties, so no single machine can separate them all. A successful metal recovery process therefore uses multiple stages of separation, each targeting a specific material characteristic, to produce the high-purity metal fractions needed for resale and reprocessing.
How are metals separated from e-waste?
Metals are separated from e-waste in a series of stages that progressively concentrate valuable metals while reducing contamination. A typical e-waste processing line may incorporate:
- Shredding: size reduction frees the metals from plastics and other materials.
- Ferrous metal recovery: magnets remove iron and steel early in the process.
- Screening and classification: material is sorted into size fractions so each separator works on a consistent feed.
- Non-ferrous metal separation: eddy current separators recover aluminium, copper, brass and zinc.
- Further refinement and product cleaning: technologies such as induction sensor sorting recover stainless steel and clean the recovered products.
- Final quality control: recovered fractions are checked before sale or reprocessing.
The table below summarises the main separation technologies used in e-waste recycling and what each one recovers.
| Technology | Metals recovered | How it works | Typical stage |
| Overband magnet | Ferrous metals (iron and steel) | Magnetic attraction lifts ferrous material from the stream | Early, to remove ferrous metals |
| Magnetic head pulley | Ferrous metals (iron and steel) | Magnetic attraction at the end of a conveyor | Early, to remove ferrous metals |
| Eddy current separator | Aluminium, copper, brass, zinc and mixed non-ferrous metals | A high-speed magnetic rotor induces currents in conductive metals, ejecting them from the stream | After ferrous removal |
| Induction sensor sorter | Stainless steel and other non-magnetic metals | Induction sensing detects metals so they can be separated out | Later refinement stage |
How do magnetic separators recover ferrous metals?
The first stage of many e-waste recycling processes is removing ferrous metals. Overband magnets and magnetic head pulleys are commonly used to extract iron and steel from mixed material streams. Removing ferrous material early improves downstream separation performance and creates a valuable steel product ready for recycling. Magnapower’s range of magnetic separators is engineered to provide reliable metal recovery across a wide range of recycling applications, including e-waste processing.
How does an eddy current separator recover non-ferrous metal?
Once ferrous metals have been removed, attention turns to non-ferrous metals. An eddy current separator uses a high-speed magnetic rotor to induce electrical currents within conductive metals. This creates a repulsive force that ejects non-ferrous metals away from the remaining material stream. The technology is particularly effective for recovering aluminium, copper, brass, zinc and mixed non-ferrous metals, and it plays a crucial role in separating conductive metals from plastics and other non-conductive materials in e-waste.
Magnapower’s eddy current separators feature advanced eccentric rotor technology engineered to generate powerful separation forces, helping recyclers achieve effective metal recovery from challenging waste streams. To understand the design in more detail, read our guide to eccentric vs concentric rotor design.
How is stainless steel recovered from e-waste?
Stainless steel and other small or difficult fractions need dedicated techniques, because they are harder to capture with magnets alone. Magnapower’s Induction Sensor Sorter is designed to recover non-magnetic metals, especially high-value stainless steel, from challenging waste streams. By carefully configuring separation stages, recyclers can recover a greater proportion of metals while minimising material losses, and Magnapower helps facilities develop complete recovery systems that maximise extraction throughout the processing line.
How do you choose the right equipment for an e-waste metal recovery system?
No two e-waste streams are identical. The main factors that influence equipment selection are:
- Feed composition: the mix of ferrous metals, non-ferrous metals, stainless steel, wire, circuit boards and plastics.
- Particle size distribution: the size range of the shredded material entering each separator.
- Plant throughput: the tonnage per hour the line needs to process.
Working with an experienced equipment supplier helps ensure each element of the system is optimised for maximum performance. Magnapower offers sample testing at its UK and US facilities, so the right combination of magnetic and eddy current separation can be confirmed on your own material before you invest.
Why work with Magnapower for metal recovery?
Magnapower, has specialised for over three decades in the design and manufacture of magnetic separation and metal recovery equipment for the recycling industry. From standalone separators to complete integrated systems, Magnapower works closely with recyclers to develop solutions that address specific material challenges and recovery objectives.
Support covers sample testing, plant design support, installation and parts, repairs and refurbishment. Whether the objective is increasing non-ferrous metal recovery, reducing contamination or improving overall plant efficiency, the right combination of magnetic and eddy current separation equipment can make a significant difference to recycling performance.
Conclusion
As e-waste volumes continue to grow, efficient metal recovery has become more important than ever. Modern separation technologies enable recyclers to extract valuable ferrous and non-ferrous metals from increasingly complex waste streams, creating environmental and commercial benefits alike. With extensive experience in magnetic separation and non-ferrous metal recovery, Magnapower helps recycling facilities maximise the value of their e-waste processing operations through proven engineering expertise and advanced separation equipment.
Looking to improve e-waste metal recovery?
Every material stream presents unique separation challenges. Contact Magnapower to discuss your application and discover how advanced magnetic and eddy current separation technology can help maximise metal recovery and plant performance.
Frequently asked questions
Explore our FAQs for clear, helpful insights and the support you need, everything in one place.
What metals can be recovered from e-waste?
Steel and iron, aluminium, copper, brass, zinc and stainless steel can all be recovered from shredded e-waste. Ferrous metals are removed with magnets, non-ferrous metals such as aluminium, copper and brass are recovered with eddy current separators, and stainless steel is typically recovered in a later stage using induction sensor sorting.
How are metals separated from e-waste?
E-waste is first shredded to free the metals from plastics and other materials. The shredded scrap then passes through a series of mechanical separators: magnets remove ferrous metals, screens sort material by size, eddy current separators recover non-ferrous metals, and further refinement stages recover stainless steel and clean the final products.
How does an eddy current separator work in e-waste recycling?
An eddy current separator uses a high-speed magnetic rotor to induce electrical currents in conductive metals such as aluminium and copper. This creates a repulsive force that ejects those metals away from the material stream, separating them from plastics and other non-conductive materials.
What is the difference between ferrous and non-ferrous metals in e-waste?
Ferrous metals, such as iron and steel, are magnetic, so magnets can pull them out of a material stream. Non-ferrous metals, such as aluminium, copper, brass and zinc, are not magnetic but do conduct electricity, so eddy current separators recover them. This is why e-waste lines combine more than one separation technology.
In what order are separators used on an e-waste line?
Ferrous metals are normally removed first using overband magnets or magnetic head pulleys, which improves the performance of downstream equipment. The material is then screened into size fractions, non-ferrous metals are recovered with eddy current separators, and stainless steel and other remaining metals are recovered in later refinement stages.
Why is metal separation important for e-waste recyclers?
Effective metal separation increases recovery rates, improves product purity, reduces waste and raises the commercial value of recycled materials. Cleaner metal fractions are easier to resell and reprocess, and recovering them reduces reliance on virgin mined resources and diverts valuable material from landfill.
How do I choose the right separation equipment for e-waste?
Equipment selection depends on feed composition, particle size distribution and required throughput, because no two e-waste streams are identical. Testing a sample of your own material is the most reliable way to confirm which combination of magnetic, eddy current and sensor-based separation will perform best. Magnapower offers sample testing at its UK and US facilities.
Can Magnapower help optimise an existing e-waste recycling process?
Yes. Magnapower works with recycling operators to assess material streams, recommend appropriate separation technologies and develop systems designed to maximise metal recovery performance. Services include sample testing, plant design support, installation, and parts, repairs and refurbishment.
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