Crane Selection for Steel Production Lines: Ironmaking to Rolling
At a glance: Kelude Heavy Industry provides crane configuration solutions for steel mills covering the four core processes—ironmaking, steelmaking, continuous casting, and rolling. With lifting capacities from 10 to 320 tons and spans from 16 to 42 meters, the total crane equipment investment typically ranges from approximately $150,000 to $3 million. The ironmaking area is equipped with ladle cranes (50–100 t) for hot metal handling and casthouse maintenance; the steelmaking shop uses metallurgical cranes (75–320 t) for converter charging and molten steel pouring; the continuous casting bay is fitted with specialized cranes (16–50 t) for tundish and mold replacement; and the rolling mill area relies on heavy-duty overhead cranes (20–50 t) to support mill assembly and roller table maintenance—all engineered to meet the stringent safety standards for handling molten metal at extreme temperatures.
Crane Selection for Steel Production Lines
Ironmaking | Steelmaking | Continuous Casting | Rolling
From ironmaking and steelmaking to continuous casting and rolling, each production stage imposes distinctly different demands on crane lifting capacity, duty classification, heat resistance class, and specialized lifting spreaders. Kelude Heavy Industry holds dedicated design & manufacturing qualifications for metallurgical cranes, enabling us to deliver complete crane solutions for steel plants—from the blast furnace casthouse to the finished goods warehouse.
Application 1 — Ironmaking
• Lifting capacity 32–100 t, metallurgical-duty overhead crane
• Heat-resistant up to 150°C+ / thermal insulation design
• Hydraulic grab / magnet spreader
• Heavy-duty classification A7–A8
• Casthouse / blast furnace maintenance
• Kelude configuration: thermal insulation + forced cooling system
Heat-resistant 150°C+ | Heavy-duty A7–A8 | Hydraulic grab / magnet
Application 2 — Steelmaking
• Lifting capacity 50–200 t, metallurgical-duty overhead crane
• Scrap charging / hot metal handling
• Ladle / tundish transfer
• Variable frequency drive / smooth control
• Dual brake + anti-dropping protection
• Kelude configuration: ladle scale + electronic anti-sway
Large tonnage 50–200 t | Ladle transfer | Dual brake anti-dropping
Application 3 — Continuous Casting
• Lifting capacity 32–80 t, dedicated foundry overhead crane
• Segment (strand) replacement duty
• Tundish preheating and hoisting
• Mold maintenance and lifting
• Precise positioning / creep speed control
• Kelude configuration: anti-sway precise positioning
Segment replacement | Precise positioning | Creep speed control
Application 4 — Rolling Mill
• Lifting capacity 20–50 t, QD/LH type overhead crane
• Mill roll assembly and maintenance
• Roller table and equipment replacement
• Duty classification A5–A6, high operational intensity
• Kelude configuration: frequency conversion + electronic anti-sway
Mill assembly | Duty A5–A6 | VFD + anti-sway
• Roll replacement lifting
• Steel coil / steel plate handling
• Lifting magnet / C-Hook
• Work duty A6~A7
• Kelude configuration with C-Hook + magnet spreader
Roll Replacement | Coil Handling | C-Hook / Magnet
Selection Parameters by Application Zone
| Parameter Item | Ironmaking | Steelmaking | Continuous Casting | Rolling |
|---|---|---|---|---|
| recommended model | metallurgical Special Purposeoverhead type | metallurgical Special Purposeoverhead type | Special Purpose Castingoverhead type | QD/LH Typeoverhead type |
| Lifting Capacity | 32t~100t | 50t~200t | 32t~80t | 20t~50t |
| Work Duty / Classification | A7~A8 | A7~A8 | A6~A7 | A6~A7 |
| Temperature Resistancerequirements | 150℃+ | 100℃+ | 80℃+ | 60℃+ |
| Special Lifting spreader | Hydraulic Grab/Lifting Magnet | ladle scale/electronic anti-sway | Segment Lifting spreader | C-Hook/Lifting magnet |
| Kelude Design | thermal insulation+Forced Cooling | ladle scale+Anti-sway | Anti-Sway Positioning | C-Hook+Custom Magnet |
Crane Selection for Ironmaking: High-Temperature, Heavy-Load Environments
Blast furnace cast house temperatures exceed 150°C, with molten iron splatter and intense radiant heat placing severe demands on crane structures and electrical systems. Metallurgical overhead cranes must be equipped with Class H insulation heat-resistant motors (rated for 180°C), heat shields with forced-air cooling fans, and heat-resistant cables (silicone rubber insulation rated for 200°C). The work duty classification must reach A7–A8 (heavy/extra-heavy duty), with lifting capacities of 32t–100t and hydraulic grabs or electromagnetic lifting magnets for slag and iron handling at the furnace front. Kelude Heavy Industry's insulated forced-cooling solution keeps electrical cabinet internal temperatures below 55°C.
For blast furnace cast houses, we recommend 50/10t or 75/20t ladle cranes (YB/T 7013 standard). The main hook handles ladle tilt stands (15–30t) and mud guns (8–12t) during replacement. With front-of-furnace temperatures of 80–120°C and heavy dust, a fully enclosed air-conditioned operator cab, water-cooled electric control cabinet, and high-temperature resistant wire rope are essential. Trough repair work requires crane-assisted refractory material handling, so full coverage above the cast house is recommended. Hot blast stove heat exchanger replacement (15–40t) and ore/coke screen replacement (3–8t) are also covered by this crane.
Steelmaking & Continuous Casting: Ladle Transfer and Segment Replacement
The core lifting tasks in steelmaking involve ladle/molten iron transport and scrap charging, with capacities from 50t to 200t and variable-frequency speed control for smooth start-stop operation. Kelude Heavy Industry's ladle scale system provides real-time molten steel weight display, while the electronic anti-sway system reduces load swing by more than 70%. Segment replacement in continuous casting is a critical periodic maintenance task, requiring 32t–80t special foundry overhead cranes with dedicated segment spreaders for precise alignment and installation.
Core lifting equipment for BOF steelmaking includes charging cranes (75–150t) and ladle cranes (100–320t), featuring triple protection through dual brakes, redundant hoisting mechanisms, and anti-dropping safety hooks, with a safety factor of no less than 5× and work duty classification of A7–A8. Tundish (15–40t) and mold (5–15t) replacement occurs every 4–8 heats; we recommend 32/5t or 50/10t metallurgical overhead cranes with variable frequency micro-speed control (0.5m/min) for fast, safe tundish changes. Segment (withdrawal straightener 20–40t) maintenance also requires crane coverage.
Rolling Mill Operations: Roll Changing and Coil Handling
Cranes in rolling mill areas must handle two primary demands: frequent roll changes and efficient coil/plate handling. QD-type 20t–50t overhead cranes with dedicated C-hooks handle steel coil lifting, while electromagnetic lifting magnets handle plate loading and unloading. The A6–A7 work duty classification supports continuous high-frequency operation. Kelude Heavy Industry customizes C-hooks and magnet systems based on coil specifications (outer diameter, width, weight) to prevent surface damage during handling.
For finishing mill stands (30–80t), backup rolls (15–30t), and work rolls (3–10t) in rolling mills, we recommend 50/10t or 100/20t heavy-duty overhead cranes (A7) with variable-frequency speed control (crane bridge 5–50m/min, trolley 3–25m/min) and anti-sway control. Kelude Heavy Industry's rolling mill cranes feature roll-specific C-hooks and U-type spreaders, completing backup roll changes in just 30–45 minutes per replacement. For coil storage yards (coil weights 10–30t), overhead cranes with electromagnetic lifting magnets or C-hook spreaders are recommended, equipped with automatic coil identification and inventory management systems.
