General purpose overhead crane
Heavy Duty A8 Steel Mill Crane 20–100 Ton |
Product Overview
The Heavy-Duty A8 Steel Mill Double Girder Overhead Crane is an extreme-duty lifting solution engineered specifically for the harsh, high-temperature environment of steel manufacturing. Designed to meet the stringent A8 work duty classification, this crane is built for continuous, severe service operations like handling molten metal ladles, slabs, billets, and coils. It features a rugged double-girder structure, specialized heat protection, and high-endurance components to ensure maximum safety, reliability, and performance in the most challenging industrial settings.
Product Advantages
- Extreme Durability (A8 Duty): Engineered for the highest work duty classification, this crane is built with a reinforced structure, hardened components, and oversized motors to withstand the extreme stresses of continuous, heavy-load operations in a steel mill.
- Superior Heat Protection: Equipped with comprehensive heat-resistant features, including steel core wire ropes, protective heat shields for the hoist and electricals, and specialized high-temperature-rated components to ensure reliable operation near furnaces and molten metal.
- Uncompromising Safety and Reliability: Features multiple redundant systems, including dual brakes on the hoisting mechanism, advanced overload protection, and anti-collision devices. The robust design and premium components minimize the risk of failure in mission-critical applications.
- Precision and Control: Standard VFD controls on all motions provide smooth, shock-free acceleration and deceleration, offering precise and safe handling of sensitive loads like full ladles of molten steel. The air-conditioned cabin provides a safe and comfortable operating environment.
- Built for Harsh Environments: All components, from the electrical cabinet to the motors and paint, are selected for their ability to withstand high ambient temperatures, dust, and corrosive fumes common in steel production.
Application Scenarios
- Ladle Handling: Safely lifting and transporting ladles filled with molten metal from the furnace to the casting area, requiring absolute reliability and precision.
- Billet and Slab Handling: Continuously moving hot steel slabs and billets from the continuous caster to the cooling beds or rolling mills.
- Coil Lifting: Efficiently handling heavy steel coils in hot and cold rolling mills and storage areas.
- Scrap Charging: Charging scrap metal into electric arc furnaces (EAF) with specialized magnets or grab buckets.
- Forge and Foundry Operations: Handling heavy forgings, castings, and dies in high-temperature metalworking environments.
Product Specifications
| Parameter | Specification |
|---|---|
| Rated Capacity | 20t / 32t / 50t / 75t / 100t (Customizable) |
| Span | 10.5 m to 35.5 m (Customized to mill layout) |
| Max. Lifting Height | 10 m to 50 m (Customized as per demand) |
| Work Duty | A7–A8 (Very Heavy / Severe Duty) |
| Lifting Speed | 0.5–6 m/min (VFD controlled, speed varies with load) |
| Trolley Traveling Speed | 2–25 m/min (VFD controlled) |
| Crane Traveling Speed | 20–80 m/min (VFD controlled) |
| Hoist Type | Open Winch Trolley with ladle hooks or specialized grab/magnet |
| Hoist Motor | High-temperature rated, heavy-duty VFD motor (Y-series) |
| Travel Motors | High-temperature rated, heavy-duty VFD motors |
| Control Methods | Air-Conditioned Cabin Control with joystick interface |
| Power Supply | 3-Phase 380V/415V/440V, 50/60Hz |
| Control Voltage | 24V / 36V / 48V (Safe control voltage) |
| Electrical Components | Siemens, Schneider, or equivalent high-temperature rated brands |
| Safety Devices | Redundant hoist brakes, overload limiter, heat shields, anti-collision |
| Working Temperature | Up to +60°C or higher with special design |
| Protection Class | IP55 / IP56 |
| Paint/Finish | Multi-layer heat-resistant and anti-corrosion paint |
| Steel Grade | Q355B or higher strength structural steel |
| Wheel/End Carriage | Heavy-duty, hardened forged steel wheels (e.g., 65Mn) |
| Rail Size (typical) | QU80, QU100, QU120 (Recommended for severe loads) |
| Braking | Dual electromagnetic and/or hydraulic brakes on main hoist |
| Limit Switches | Rotary cam and gear-type limit switches for all motions |
| Documentation | Full conformity and test reports, CE/ISO, material certificates |
| Warranty | 1 Year (Extended service packages available) |
| Lead Time | 60–90 days (negotiable for specific configurations) |
Features at a Glance
- A7–A8 work duty classification for severe, continuous steel mill operations.
- Comprehensive heat protection including shields and high-temperature components.
- Redundant safety systems, including dual hoist brakes, for handling critical loads.
- Standard VFD controls on all movements for ultimate precision and control.
- Robust, custom-engineered design for maximum reliability and service life.
FAQ
1. What’s the information should I provide when inquiry?
More details or drawings, better. A: Lift capacity B: Crane arm length C: lift height: hook travel distance D: What material to lift E: power source or other specials you give us will be more appreciated.
2. How many operating methods for my selection?
Standard operating methods: A: pendent controller with push buttons .B: remote control with push buttons. Choose any type as you like.
3. Can this type work in hazardous environment?
Sure! We can customize for you, acid proof or explosion proof, no problem for that.
4. What about warranty time ?
Use within the standard for the next 12 months.
5. How can we install the crane? Our senior engineer can be your side to do the installation guide service and training.
6. May I visit your factory?
Of course. We can pick you up at train station, high-speed rail station or airport, and book hotel for you.
