- A7
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Single Girder Overhead CraneCategory—General Industrial Crane -
Grab and Magnet Two Purpose Bridge CraneCategory—General Industrial Crane -
L typed Single Girder Hoist Gantry Crane with a hoistCategory—General Industrial Crane -
L typed Single Girder Hook Gantry Crane with a winchCategory—General Industrial Crane
Introduction of Four Girder Ladle Crane
Engineered for demanding metallurgical operations, the YZS Casting Bridge Crane integrates a robust four-girder, four-rail framework with dual crab systems to ensure reliable molten steel handling. Its structural design features a primary crab operating on the outer bridge rails and an auxiliary crab on the inner rails. The primary unit utilizes a connecting traverse mechanism to securely lift and transport steel ladles, while the auxiliary crab—equipped with a hook—maneuvers beneath the main system to facilitate precise pouring of molten steel, slag removal, and supplementary lifting tasks.
Constructed with a focus on durability and thermal management, the crane’s girders house both the trolley travel system and key electrical components. An advanced electric panel room, insulated with rock wool and equipped with an integrated air cooling unit, maintains optimal operating temperatures. To minimize heat transfer from high-temperature materials, a specialized thermal baffle is installed along the girder’s underside.
The trolley travel mechanism employs a four-corner drive configuration, ensuring smooth and balanced movement under heavy loads. For operational accuracy, the crane includes a dedicated electronic weighing system with displays accessible from both the cabin and bridge. The main hoist is further safeguarded by an overspeed protection switch.
Features of Four Girder Ladle Crane
Key technical features include:
Dual-crab design enabling simultaneous main and auxiliary operations
Four-girder, six-rail main body construction for superior load distribution
Two-stage assembly process incorporating stress-relief treatment and full-position welding to guarantee dimensional stability and alignment accuracy
Customizable operating speeds tailored to user requirements
Rated for environments ranging from -10°C to 60°C, the YZS crane meets A7 work class standards and operates on a 3-phase 380V/50Hz power supply (customizable).
Safety & Protection Systems:
Dual braking on each lifting point (four brakes for main hoist)
Overload restriction with automatic shutdown except for lowering motions
Travel limits with primary and backup limit switches or wireless anti-collision technology
Anti-fall mechanism for trolley and crane drive motors
Safety latch to prevent load disengagement
Comprehensive electrical protections: under-voltage, over-current, short-circuit, phase sequence, zero-position, and voltage loss protection
Emergency stop and high ingress protection (IP54/IP55)
Technical Parameters of Four Girder Ladle Crane
Built to handle capacities starting from 125/32 tons, the YZS crane offers enhanced stability through a dual-wire rope pulley system on the ladle hook. Each pulley employs two wire ropes for redundancy, ensuring operational safety even in the event of a single rope failure. The configuration allows flexible positioning of the auxiliary hook relative to the main hook, supporting complex steelmaking and casting processes with reliability and precision.
Applications of Four Girder Ladle Crane
The YZS Four-Girder Ladle Crane is engineered for extreme-duty applications in primary metal production, delivering precision and reliability in high-temperature material handling. Its specialized design addresses the complex operational demands of modern metallurgical facilities, with key applications including:
1. Molten Metal Transport & Process Flow Management
As a core component in steel plant melt shops, this crane system ensures seamless transfer of ladles containing liquid steel or other molten metals. Its dual-crab configuration allows simultaneous handling of primary and secondary tasks, maintaining continuous production flow from furnace to casting areas.
2. Precision Pouring Operations
The crane enables controlled pouring of molten metal into continuous casting machines or ingot molds. The independent auxiliary crab provides refined positioning capability during teeming operations, allowing operators to regulate metal flow with millimeter-level accuracy for improved yield and casting quality.
3. Integrated Hot Metal Charging
Beyond basic transfer functions, the crane supports sophisticated charging sequences where molten metal must be delivered to various processing stations. The thermal protection systems and structural integrity allow reliable operation in direct proximity to furnaces and other high-heat sources.
4. Secondary Metallurgy Support
During ladle treatment processes including alloying, degassing, and temperature adjustment, the crane provides stable positioning and manipulation of treatment ladles. The redundant lifting systems and precision controls ensure safe handling throughout extended treatment cycles.
5. Emergency Metal Diversion & Slag Handling
The design incorporates capability for emergency operations including hot metal diversion and slag pot handling. The auxiliary hook system can manage slag removal simultaneously with primary metal transfer operations, minimizing process interruptions.
6. Maintenance & Component Handling
Beyond primary production duties, the crane facilitates planned maintenance activities through its capacity to handle heavy equipment replacements including tundishes, furnace components, and other critical plant infrastructure.
Built to withstand continuous operation in temperatures from -10°C to 60°C, the YZS crane incorporates multiple protection layers specifically designed for metallurgical environments. The four-girder construction provides exceptional stability during critical pouring operations, while the comprehensive safety systems ensure operational integrity even under the most demanding conditions found in modern steel production facilities.
