In any bottom ash processing plant, extracting bulk iron metal is a critical first step. The belt electromagnetic separator (also known as a suspended magnetic separator) is a heavy-duty, self-cleaning magnetic separation device specifically designed to extract large, heavy ferromagnetic impurities (scrap iron) directly from conveyor belts.
By generating a powerful deep-penetrating electromagnetic field, this equipment serves as the first line of defense while effectively recovering valuable scrap iron. It prevents large iron chunks from tearing conveyor belts, clogging cone crushers, or damaging the precision Kevlar belts of downstream eddy current separators.
Core Principle: Deep Magnetic Extraction
Suspended directly above or at the discharge end of the material conveyor belt, the separator continuously extracts iron from thick layers of waste incinerator slag.
- Magnetic Field Generation: Upon power-up, internal excitation coils generate a high-intensity, deep-penetrating electromagnetic field that reaches through the slag layer on the conveyor belt.
- Instant Extraction: As mixed materials pass through, ferromagnetic metals (iron chunks, steel wires, bolts) are instantly lifted against gravity.
- Self-Cleaning Function: The separator features a continuously operating heavy-duty armored belt equipped with steel scrapers (iron scrapers). This belt captures extracted ferrous impurities.
- Automatic Discharge: Scrapers drag iron particles out of the magnetic field's influence, allowing them to freely fall into designated collection bins under gravity, ensuring unattended operation around the clock.
Core Advantages for Waste-to-Energy Processing
Incinerator bottom ash often contains tangled long wires and heavy engine blocks, posing challenges for conventional permanent magnets. Our electromagnetic series products deliver exceptional magnetic force required for extreme conditions.
| Advantages |
Specific Benefits for IBA Sorting |
| ✅ Exceptional Penetration Depth |
Generates magnetic fields far deeper than permanent magnets, extracting deeply buried heavy ferrous fragments from thick layers of uncrushed raw bottom ash. |
| ✅ Fully Enclosed Resin Casting |
Internal coils are vacuum-cast with specialized electrical resin, delivering superior heat dissipation. This design ensures complete dust and moisture resistance while withstanding corrosion from wet, toxic slag. |
| ✅ Armored Discharge Belt |
The reinforced iron discharge belt withstands impacts from sharp, heavy scrap metal, effectively preventing tears and ensuring continuous automatic operation. |
| ✅ Downstream Equipment Protection |
Prevents heavy iron materials from entering secondary crushers or high-speed sorting equipment, effectively avoiding major equipment damage and costly downtime losses. |
Key Application Scenarios in Resource Recovery
- ◾ Primary IBA Sorting: Installed after primary slag crushers to extract and separate rebar, engine blocks, and large iron plates prior to secondary processing.
- ◾ Construction & Demolition (C&D) Waste: Removes rebar and iron components from crushed concrete to produce pure recycled aggregate.
- ◾ Automobile Shredder Residue (ASR): Separates heavy steel components from crushed vehicle bodies and mixed plastics.
Frequently Asked Questions (FAQ)
Q: Should I choose an electromagnetic or permanent magnet suspended magnetic separator?
A: For conventional applications with thin material layers, permanent magnet separators are cost-effective and require no power to maintain the magnetic field. However, when processing incinerator bottom ash—which features high material density, heavy weight, and often operates in thick layers (deep bed loading) on wide conveyors—electromagnetic separators are strongly recommended. They possess deep penetration capability to extract heavy ferrous contaminants from the bottom layer of the conveyor belt.
Q: Can a belt magnetic separator remove fine iron particles from wet slag?
A: No. Belt magnetic separators are specifically designed for dry extraction of large iron pieces from conveyor belts. Moist fine iron particles (<3mm) adhere to wet slag and are difficult to lift upward via air suction. To extract fine iron particles and purify slag, our wet magnetic separators in the washing circuit must be used.
