- Aug 05, 2025
- Case Studies
50t Metallurgical Crane and 15t Bridge Crane for Algeria
Check out our powerful 50 Ton QDY metallurgical crane and 15 Ton QD bridge crane, perfect for Algeria's heavy lifting needs. Elevate your operations today!
A major metals plant in Algeria faced rising demand for aluminum and steel goods. Their previous workshops used a lot of energy and emitted a lot of pollution. To cut energy use and enhance process efficiency, they created a new, more efficient metallurgical workshop. Yuantai provided a 50-ton QDY metallurgical double-girder overhead crane and a 15-ton QD single-girder bridge crane to service two crucial locations of the new facility. This case study looks at the customer's lifting needs, how each crane handled different and hard duties.
QDY 50 Ton Metallurgical Crane Product
This QDY 50-ton metallurgical crane is built for heavy, hot, and continuous duty in primary smelting and casting areas. It handles very large molten-metal ladles, heavy furnace trays, and bulky ingot molds with steady, accurate motion. Controls and components are chosen to resist high ambient temperatures and dust.
1. Lifting Molten Metal Ladles
The crane must lift ladles that reach 40 tons when full. They need fail-safe load cells, quick-reaction brakes, and smooth acceleration to avoid jerks that could spill molten metal. Heat shields and insulated fittings protect wiring and moving parts near the furnace. Remote control and proportional drives give you fine control during pour and transfer.
2. Replacing Furnace Hearth Liners
Removing and installing 15-ton furnace trays calls for accurate positioning and adaptable attachments. The crane should allow secure clamping and precise lowering so crews can change hearth liners without re-rigging. A spreader or specialized grab makes the swap faster and safer. Design for easy maintenance of the lifting gear so you can perform checks during planned stops and keep turnaround time low.
3. Transporting Ingot Molds and Castings
Molds and ingot bars between 10 and 25 tons require steady travel and anti-sway control to protect product and people. The crane needs reliable travel drives and soft-start functionality so molds are not shocked on pickup or setdown. Trolley and bridge speeds should be matched to the workflow to avoid congestion at the casting machines and in storage areas.
4. High Hook Height
A 12-meter under-hook height is necessary to clear furnace fittings and gas ducts. The crane structure and runway elevation must be engineered so the hoist reaches that height without sacrificing stability. Taller cranes need attention to girder stiffness and sway control to keep lift accuracy high. You should also check building columns and roof structure for the added loads and lateral forces introduced by a high gantry.
5. Continuous Heavy-Duty Operation
For daily 16-hour shifts and 50–60 heavy cycles per shift, the crane needs a high duty classification and systems built for continuous work. That calls for industrial-grade motors with thermal protection, heavy-duty bearings, and duty-rated reducers. Cooling and ventilation for electrical cabinets prevent overheating in prolonged runs.
Since our customers need to handle molten metal and operate for long periods of time, we offer heat-resistant components, precise control systems and high work ratings for continuous, high-load operations. We have designed them with rugged insulation, heat-resistant lifting ropes, encoders and load monitoring devices to ensure safety in the workplace. Our safety devices, emergency stop function, and anti-collision protection devices contribute to the normal operation of the crane.
QD 15 Ton Bridge Crane Product – Customer's Crane Need
Yuantai designed this 15 ton single-girder bridge crane for reliable, everyday industrial lifting. The crane suits medium-sized bays and common workshop needs. It combines a robust welded girder, a European-style wire rope hoist, hardened travel components, and modern controls. Yuantai completed factory testing and on-site commissioning so you get a ready-to-use system with documented safety checks and a handover.
- Handling Heat-Treat Ovens and Quench Tanks: One of the key jobs is to carry big equipment racks between high-temperature heat-treating furnaces and quench tanks. These tasks necessitate consistent crane performance, heat-resistant components, and precise load control to enable the safe movement of materials, which are frequently at high temperatures. The bridge crane's strong lifting mechanism and smooth trolley movement make it perfect for this application.
- Lifting Machining Fixtures: Machining jobs necessitate precise alignment of tooling plates, fixtures, and other machine components, which generally weigh 2 to 10 tons. The QD bridge crane allows for precise placement of these parts on CNC machines and other machining centers. Its tight control mechanism provides slow, precise movement, preventing misalignment or damage to expensive gear, making it an invaluable tool in precision machining applications.
- Palletized Finished Products: After processing, finished products are often palletized and stored for shipment. These loads, which can weigh up to 12 tons, need to be quickly and safely transferred to staging areas. The QD crane facilitates efficient internal logistics, reducing manual handling and increasing workplace safety during final product handling.
- Low Headroom: The facility presented a spatial challenge: only 6 meters of under-hook height were available within the workshop's roof structure. The QD 15 Ton Bridge Crane was engineered to accommodate this low headroom with a compact hoist design and optimized beam layout, ensuring that all lifting operations could occur safely and without obstruction within the constrained vertical space.
- Moderate Duty Cycle: Operating at a duty cycle of 5–10 lifts per hour over a 10-hour workday, the crane is tailored for moderate daily usage. This level of activity requires a well-balanced system—durable enough to withstand daily wear but cost-effective compared to heavy-duty systems used in primary processing or 24/7 operations. The crane's design and components are selected accordingly, offering a balance of endurance and affordability.
The customer needed a cost-effective crane for these lighter but precision-sensitive tasks, with reliable controls and safety features for indoor operations.
QDY 50 Ton Metallurgical Crane Product Design Provided by Yuantai
When it comes to handling extreme temperatures and heavy-duty lifting in metallurgical environments, Yuantai’s QDY 50 Ton Metallurgical Overhead Crane is specifically engineered to meet the demanding conditions of steel mills and foundries. This crane is purpose-built for transferring molten metal, ladles, and other high-temperature loads safely and reliably. Designed in accordance with advanced international standards and strict safety codes, it integrates robust materials, precision motion control systems, and enhanced protective features to ensure long-term performance in challenging working environments.
1. Double-Girder Bridge Structure
The main bridge structure adopts a double-girder configuration, utilizing two box-section girders constructed from high-strength Q345D low-alloy structural steel, known for its superior performance under high stress and elevated temperatures. Internal transverse stiffeners are incorporated throughout each girder to increase torsional rigidity and load-bearing stability during operation. This design supports a 30-meter span and allows for a generous 12-meter under-hook clearance, ensuring smooth overhead travel and efficient handling even in facilities with complex layouts or obstructive equipment such as furnaces and ducts. With a duty classification of FEM 2m, this crane is built for moderate to heavy use.
2. End Trucks and Rails
Supporting the bridge structure are two robust end trucks, each fitted with eight HRC 60-hardened steel wheels, designed to evenly distribute the 100-ton bridge weight while minimizing wear and maximizing service life. These wheels offer excellent resistance to high-temperature deformation and rolling fatigue. The crane runs on S49 steel rail profile, securely welded to the runway beams for added structural stability. The runway installation maintains a stringent ±3 mm alignment tolerance across the entire 30-meter rail length, ensuring precise and safe crane movement along the production floor.
3. Drive & Control Systems
Motion control is handled via ABB ACS880 variable frequency drives (VFDs), which enable smooth and controlled acceleration and deceleration for the bridge, trolley, and hoisting mechanisms. This not only minimizes mechanical stress but also improves positioning accuracy and extends component life. A Siemens S7-1500 PLC integrates all crane operations and communicates with a touchscreen human-machine interface (HMI), offering real-time load monitoring, system diagnostics, and parameter configuration. Operators can also manage crane functions through a 2.4 GHz industrial wireless remote control, equipped with a dead-man switch and supporting a reliable ±100-meter control range, ensuring safe distance operations when required.
4. Environmental & Safety Features
Given its metallurgical application, the QDY crane is intended to operate in temperatures as high as 120 °C. The crane components are coated with heat-resistant epoxy primers and polyurethane topcoats, which provide long-term corrosion protection and thermal stability. Safety is strengthened with software-based active anti-sway control, which improves precision during ladle positioning—an essential characteristic for pouring molten metal over furnaces. Additionally, a complete suite of emergency protection systems is integrated, including anti-collision sensors, travel limit switches, and dual emergency stop mechanisms—one mounted on the wireless remote and the other within the operator cabin, assuring redundancy in crucial situations.
QD 15 Ton Bridge Crane Product Design Provided by Yuantai
When it comes to handling extreme temperatures and heavy-duty lifting in metallurgical environments, Yuantai’s QDY 50 Ton Metallurgical Overhead Crane is specifically engineered to meet the demanding conditions of steel mills and foundries. This crane is purpose-built for transferring molten metal, ladles, and other high-temperature loads safely and reliably. Designed in accordance with advanced international standards and strict safety codes, it integrates robust materials, precision motion control systems, and enhanced protective features to ensure long-term performance in challenging working environments.
1. Double-Girder Bridge Structure
The main bridge structure adopts a double-girder configuration, utilizing two box-section girders constructed from high-strength Q345D low-alloy structural steel, known for its superior performance under high stress and elevated temperatures. Internal transverse stiffeners are incorporated throughout each girder to increase torsional rigidity and load-bearing stability during operation. This design supports a 30-meter span and allows for a generous 12-meter under-hook clearance, ensuring smooth overhead travel and efficient handling even in facilities with complex layouts or obstructive equipment such as furnaces and ducts. With a duty classification of FEM 2m, this crane is built for moderate to heavy use.
2. End Trucks and Rails
Supporting the bridge structure are two robust end trucks, each fitted with eight HRC 60-hardened steel wheels, designed to evenly distribute the 100-ton bridge weight while minimizing wear and maximizing service life. These wheels offer excellent resistance to high-temperature deformation and rolling fatigue. The crane runs on S49 steel rail profile, securely welded to the runway beams for added structural stability. The runway installation maintains a stringent ±3 mm alignment tolerance across the entire 30-meter rail length, ensuring precise and safe crane movement along the production floor.
3. Drive & Control Systems
Motion control is handled via ABB ACS880 variable frequency drives (VFDs), which enable smooth and controlled acceleration and deceleration for the bridge, trolley, and hoisting mechanisms. This not only minimizes mechanical stress but also improves positioning accuracy and extends component life. A Siemens S7-1500 PLC integrates all crane operations and communicates with a touchscreen human-machine interface (HMI), offering real-time load monitoring, system diagnostics, and parameter configuration. Operators can also manage crane functions through a 2.4 GHz industrial wireless remote control, equipped with a dead-man switch and supporting a reliable ±100-meter control range, ensuring safe distance operations when required.
4. Environmental & Safety Features
Given its metallurgical application, the QDY crane is intended to operate in temperatures as high as 120 °C. The crane components are coated with heat-resistant epoxy primers and polyurethane topcoats, which provide long-term corrosion protection and thermal stability. Safety is strengthened with software-based active anti-sway control, which improves precision during ladle positioning—an essential characteristic for pouring molten metal over furnaces. Additionally, a complete suite of emergency protection systems is integrated, including anti-collision sensors, travel limit switches, and dual emergency stop mechanisms—one mounted on the wireless remote and the other within the operator cabin, assuring redundancy in crucial situations.
Performance & Task Handling in New Workshop
1. Ladle Handling with 50 Ton QDY Crane
Molten ladles—filled to 45 ton—are lifted from furnace carriages, swung over ladle tippers, and poured into holding furnaces. Active anti-sway control prevented ±50 mm lateral sway, ensuring safe transfers above workers. Time per ladle transfer dropped from 12 minutes (with mobile crane) to under 4 minutes.
2. Furnace Tray Replacement
During maintenance outages, the 15 ton auxiliary hoist removed refractory trays weighing up to 15 ton. The dual-hoist design saved rigging time: no need to swap hooks. Tray swaps now take 30 minutes instead of 1.5 hours.
3. Ingot Mold & Casting Transfers
The auxiliary 15 ton hoist handles ingot molds (10 ton) moving between casting machines and storage. Precise trolley travel (±20 mm) aligns molds under casting spouts. Mold changeover times halved from 60 to 30 minutes.
4. CNC Fixture Placement with 15 Ton QD Crane
In the secondary shop, large machining fixtures (8 ton) are positioned on CNC tables with ±10 mm accuracy. Crane travel speeds and creeping hoist mode improved machine uptime. Fixture swaps now require 15 minutes rather than 45 minutes.
5. Finished Product Staging
Billet bundles (12 ton) stack on storage racks and onto trucks. The indoor crane's reliability means no forklift required, freeing floor space and reducing collision risk. Loading cycles dropped from 25 minutes to 10 minutes.
Yuantai QDY and QD Overhead Crane
Advantages of Yuantai's Crane Solutions
Increased Efficiency
The 50 ton QDY crane's dual-hoist saves rigging steps. Ladle throughput rose by 200%. The 15 ton QD crane cut fixture changeover time by 67%.
Improved Safety
Wireless control keeps operators clear of loads. Anti-sway, overload protection, and emergency stops eliminated lifting incidents. Safety audits recorded zero crane-related events since commissioning.
Energy & Cost Savings
VFD drives reduced power peaks by 15%, saving 25 000 kWh/year. Eliminating mobile crane rentals saved $250 000 annually. Reduced downtime improved furnace utilization by 10%.
Durability & Low Maintenance
High-temperature coatings and heat-resistant ropes extend service life. Scheduled maintenance intervals doubled, cutting maintenance costs by 30%.
Other Applications for QDY & QD Crane Products
QDY and QD overhead cranes are designed for the most demanding material handling duties in industrial settings that require both heavy lifting and accurate control. These cranes are commonly employed in applications outside than standard industrial and logistics facilities. Steel production, foundry operations, energy generation, shipbuilding, and heavy machinery assembly all benefit from their strong construction, high load capabilities, and adaptability to difficult working circumstances. The following are some of the significant applications in which QDY and QD cranes provide critical operational value.
1. Steel Mill Continuous Casting
In steel mills, QDY cranes are essential for managing the intense heat and weight involved in continuous casting operations. They are used to lift and transport tundishes—large vessels carrying molten steel—and torpedo cars that transfer hot metal between processing stages. Meanwhile, QD cranes are employed to move massive moulds and rollers essential for shaping and forming steel products. These cranes are often equipped with heat-resistant components and redundant safety systems to withstand the harsh foundry environment and ensure uninterrupted operations.
2. Foundry Core Shop
In foundry operations, particularly within the core shop, cranes are responsible for transporting heavy and high-temperature items. QDY cranes handle 50-ton molten iron ladles between furnaces and pouring lines, ensuring smooth and safe metal handling. Additionally, they move 10-ton mould flasks between the core-making and pouring stations. Their ability to perform repetitive and precise positioning tasks helps improve workflow efficiency and reduce human exposure to high-risk zones.
3. Heavy Equipment Assembly
In the assembly of heavy equipment such as excavators, bulldozers, and drilling rigs, QD cranes play a pivotal role in positioning large components. Excavator booms weighing up to 30 tons and cabin modules around 10 tons are carefully moved and aligned onto jigs for welding, assembly, and painting. These cranes offer synchronized hoisting and fine-motion control, ensuring accurate placement and improving productivity during the assembly process.
4. Power Plant Boiler Maintenance
Within power generation facilities, especially in thermal power plants, QDY cranes assist in the installation and maintenance of critical components. Boiler drums weighing up to 45 tons and turbine rotor sections around 15 tons are lifted and maneuvered within confined spaces. Their compact trolley designs and flexible load handling allow them to operate safely in restricted maintenance areas, reducing downtime during scheduled plant overhauls.
5. Shipyard Block Handling
In shipbuilding, cranes are indispensable for transporting pre-fabricated hull blocks and sections. QDY cranes with 60-ton main hoists and 15-ton auxiliary hoists are used to lift and place large block sections from fabrication workshops to assembly docks. These cranes are often equipped with multi-point lifting beams and anti-sway technology to ensure stability and precision when moving oversized structures. Their ability to support modular shipbuilding processes significantly enhances efficiency and reduces assembly time.
Conclusion
Yuantai's 50 ton QDY metallurgical crane and 15 ton QD bridge crane provided the Algerian plant with reliable, efficient lifting solutions. The custom designs addressed the demanding tasks of ladle handling, tray replacement, and precision fixture placement. Energy and cost savings, improved safety, and higher throughput demonstrate the value of tailored crane systems. Beyond this workshop, QDY and QD cranes serve across heavy industries where high-capacity, precise, and continuous operation is essential—for steel, foundry, power, shipbuilding, and large-equipment assembly sectors.
