Customized solutions and selection suggestions for metallurgical bridge cranes

In the demanding environment of metallurgical operations, standard overhead cranes simply won’t suffice. At Dongqi Crane, we specialize in heavy-duty, customized bridge crane systems specifically designed to withstand the extreme conditions of high temperatures, intensive loads, and corrosive atmospheres prevalent in steel mills, foundries, and metal processing plants.

Our engineered-to-order solutions address every critical aspect of metallurgical material handling:

• Precision equipment selection – Matching crane capacity (up to 500T+) with your specific process requirements
• Specialized functional configurations – From heat-resistant components to explosion-proof options
• Advanced safety systems – Incorporating overload protection, emergency braking, and intelligent monitoring for hazardous environments

Whether you’re handling molten metal, heavy castings, or high-temperature billets, our ISO-certified cranes combine robust construction, intelligent controls, and industry-leading safety features to ensure reliable performance where it matters most.

1. Core design parameters

Lifting capacity

• Main hook rated load: 50~450t (customized according to furnace/rolling mill capacity)
• Auxiliary hook auxiliary load: 10~50t (for mold/repair)
• Working level: A7~A8 (heavy load continuous cycle working condition)

Span and height

• Standard span: 18~35m (adapt to the column spacing of metallurgical workshop)
• Lifting height: main hook 16~30m, auxiliary hook 20~40m (compatible with ladle lifting and waste stacking)

Environmental adaptability

• Temperature range: -20℃~+80℃ (heat insulation plate installed in high temperature area)
• Protection level: IP54 (anti-metal dust, sputtering)

2. Metallurgical special function configuration

Dual brake safety system

• Main lifting mechanism equipped with dual brakes (electromagnetic brake + hydraulic disc brake)
• Mechanical self-locking device is added to the ladle hook to prevent tipping

High temperature protection kit

• Wire rope: 316 stainless steel core + ceramic fiber coating (resistant to 1000℃ short-term radiation)
• Hook group: water-cooled hook head (optional thermocouple temperature monitoring)

Intelligent control module

• Anti-sway system (PID algorithm based on PLC, ladle positioning accuracy ±5mm)
• Black box data recording (stores load, displacement, temperature and other parameters, supports accident tracing)

3. Structural reinforcement design

• Box-type main beam: Q345B steel plate welding, longitudinal ribs welded to the web (torsional rigidity increased by 30%)
• End beam buffer: hydraulic-spring composite, impact absorption capacity ≥50kJ
• Trolley travel mechanism: three-drive configuration (to ensure load reduction when one side of the motor fails)

4. Safety redundancy measures

Multiple protection devices

• Overload limiter (110% alarm, 125% power off)
• Dual limit of lifting height (mechanical + electronic redundancy)
• Emergency power supply for sudden power failure (supports 15 minutes of emergency unloading)

Maintenance-friendly

• Centralized lubrication system (automatic oiling with timed quantity)
• Quick-detachable cover for the platform (for easy inspection of the reel and gear set)

5. Typical application scenarios

• Steelmaking workshop: steel ladle transfer (need to cooperate with gantry hook vertical lifting)
• Continuous casting area: rapid replacement of crystallizer (requires micro speed 0.2m/min)
• Waste treatment: electromagnetic suction cup scrap steel handling (requires additional power supply cable)

Selection Suggestions

Process	Recommended models	Key Features
Electric furnace smelting	Four-beam four-track casting crane	Dual car collaboration, anti-magnetic interference design
Hot rolling production line	Low headroom metallurgical crane	Compact structure, heat-resistant coating
Finishing area	Frequency conversion control explosion-proof crane	Ex d IIC T4 explosion-proof certification

Note: The actual selection needs to be combined with the workshop layout, process cycle and ladle size for finite element analysis (FEA). It is recommended to reserve 20% margin to meet the needs of production expansion. The equipment must comply with GB/T 14405-2011 Technical Conditions for Metallurgical Cranes and ISO 12485 international standards.