Overview of ZOKECRANE Crane Lifting Electromagnets
Manufactured by Henan Zoke Crane Co., Ltd., ZOKECRANE lifting electromagnets are constructed with cast high-grade steel magnetic shells, high-purity aluminum or copper excitation coils, and heat-resistant manganese steel bottom protection plates. Designed in strict compliance with ISO, CE, and international electrical standards, our electromagnet systems include circular magnets for scrap, rectangular magnets for steel plates/billets, high-temperature heat-resistant magnets, and battery backup power supply systems to prevent load drop during power outages, accommodating lifting capacities from light duty to over 50 tons.
Key Technical Specifications & Parameters
| Technical Parameter | Lifting Electromagnet Specification |
|---|---|
| Product Type | Circular Lifting Magnet (Scrap) / Rectangular Magnet (Plates/Billets) / High-Temp Magnet System |
| Excitation Coil Material | High-purity double-insulated copper wire / Anodized aluminum ribbon (Lightweight design) |
| Duty Cycle Rating | TD-60% (Standard industrial duty) / TD-75% (High-frequency severe metallurgical duty) |
| Lifting Target Temperature | Below 200°C (Standard type) / Up to 700°C (High-temperature metallurgical type) |
| Operating Voltage | DC 220V (Standard) / Strong excitation DC 290V (Fast attraction mode) |
| Insulation Class & Protection | Class H / Class C insulation; IP65 / IP68 fully sealed waterproof & dustproof housing |
| Bottom Protection Plate | High-manganese steel plate (ZGMn13) for impact resistance and non-magnetic conductivity |
| Control System Components | Rectifier control cabinet, spring cable reel, UPS battery backup system, spreader beam |
| Certifications & Standards | ISO 9001 Quality System, CE Certified, SGS Verified, JB/T 10205 Compliant |
Core Product Advantages & Engineering Features
- Massive Magnetic Force & High Penetration: Computer-optimized magnetic field circuit design delivers deep magnetic penetration through bundled steel bars, loose scrap, or stacked plates.
- Fully Sealed Waterproof & Heat-Resistant Structure: Vacuum resin filling and IP65/IP68 epoxy sealing protect excitation coils against moisture ingress, aggressive dust, and thermal expansion.
- High-Temperature Melt Shop Performance: Specialized double-chamber thermal insulation design allows direct handling of red-hot steel slabs, billets, and structural sections up to 700°C without demagnetization.
- UPS Battery Backup Safety Protection: Integrated uninterruptible power supply (UPS) safety control systems automatically maintain magnetic power for 15 to 30 minutes in the event of main plant AC power failure.
Industrial Applications of Overhead Crane Electromagnets
ZOKECRANE heavy-duty lifting electromagnets provide versatile magnetic material handling solutions across diverse industrial sectors worldwide:
1. Scrap Steel Recycling & Foundry Charging Bays
Circular magnets attached to overhead cranes for rapid loading and unloading of loose pig iron, steel turnings, heavy scrap, and furnace charging buckets.
2. Steel Rolling Mills & Billet Handling Yards
Multiple rectangular electromagnets mounted on lifting spreader beams for transporting long steel billets, slabs, rebar bundles, and rolled coils.
3. Heavy Machinery & Plate Fabrication Workshops
Precision single or multi-plate magnets used for feeding thick steel plates onto CNC laser cutting beds, shearing machines, and welding bays.
4. Port Terminals & Inland Waterway Logistics
Heavy-duty weatherproof electro-magnetic spreaders mounted on gantry and portal cranes for ship loading and discharge of steel products.
Frequently Asked Questions (Product FAQs)
What is the difference between Circular and Rectangular Lifting Electromagnets?
Circular Electromagnets produce a concentrated deep-penetrating magnetic field, making them ideal for handling loose, irregular materials like scrap iron, steel turnings, and pig iron. Rectangular Electromagnets provide a uniform, distributed magnetic surface area, making them optimal for flat steel plates, long billets, pipes, and structural steel beams.
How does the UPS battery backup system protect the crane operator and workshop workers?
If the main power grid fails while the crane is hovering a heavy load overhead, the electronic control system instantly switches to the emergency battery backup unit in milliseconds. The battery maintains full magnetic holding power for up to 15–30 minutes, allowing the crane operator to safely lower the suspended steel load to the ground.
Can ZOKECRANE electromagnets lift red-hot steel billets directly from continuous casting lines?
Yes. Our high-temperature series electromagnets feature dual-layer heat radiation shields, special Class C heat-resistant insulation, and internal air-gap cooling barriers, enabling continuous handling of hot steel billets and slabs up to 700°C.
Why is a non-magnetic manganese steel bottom plate used on the electromagnet?
High-manganese steel (ZGMn13) is non-magnetic, which prevents short-circuiting the magnetic flux lines across the magnet’s own base. This forces 100% of the magnetic field deep into the target steel workload while providing extreme impact resistance against heavy steel scrap collisions.
Export & Logistics FAQs for International Buyers
Which international markets does ZOKECRANE export crane electromagnets to?
ZOKECRANE magnetic handling equipment and crane accessories are exported worldwide, supplying steel producers, scrap processors, and port terminals in Russia, Uzbekistan, the Philippines, Bangladesh, Australia, Qatar, Tanzania, Singapore, Saudi Arabia, Brazil, Nigeria, and many other global markets.
How are lifting electromagnets and electrical control cabinets packaged for ocean freight?
The heavy magnet body is coated with anti-rust oil, wrapped in thick protective film, and anchored onto heavy steel skids inside export-standard fumigated wooden cases. Control cabinets, spring cable reels, and battery banks are vacuum-sealed with moisture-proof desiccants and packed in reinforced sea-worthy crates.
What quality test reports and certifications accompany ZOKECRANE magnet shipments?
Every shipment is accompanied by a complete quality control dossier, including ISO 9001 compliance, European CE certificates, electrical insulation resistance test sheets, coil temperature rise reports, magnetic attraction capacity certificates, and SGS third-party verification upon request.
What commercial shipping terms and manufacturing lead times do you offer?
We support standard international commercial terms including FOB, CIF, CFR, DDU, and DDP. Standard circular scrap magnets (MW5 series) have fast lead times of 15 to 20 business days; custom multi-magnet spreader beam systems or high-temperature billet magnets take 25 to 35 business days.
Does ZOKECRANE provide complete turn-key electrical integration for crane retrofits?
Yes. We supply complete turn-key packages including the electromagnet body, lifting spreader beam, AC-DC rectifier control panel, emergency battery backup system, spring-driven or motor-driven cable reel, and cable accessories, backed by 24/7 remote technical guidance for field installation.