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Home > Casting Overhead Crane > Rotary Feeding Overhead Crane with 270° Rotating Trolley for Scrap Charging in Steel Mills

Rotary Feeding Overhead Crane with 270° Rotating Trolley for Scrap Charging in Steel Mills

Rotary Feeding Overhead Crane with 270° Rotating Trolley for Scrap Charging in Steel Mills
rotary feeding overhead crane
rotary scrap charging crane
rotary charging overhead crane
rotary feeding bridge crane
Rotary Feeding Overhead Crane with 270° Rotating Trolley for Scrap Charging in Steel Mills
rotary feeding overhead crane
rotary scrap charging crane
rotary charging overhead crane
rotary feeding bridge crane
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CCC CE ABS BV CCS
Capacity:5 – 320 t (customizable)
Lifting Height:12 – 28.5 m (customizable)
Voltage/Hertz:(customizable)
Brand Name: YUNTIAN
Place of Origin: Henan, China
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Introduction

Technical Data (General Version)

Application

Features

PRODUCT INTRODUCTION

The Rotary Feeding Overhead Crane, also widely referred to in the steel industry as the Rotary Scrap Charging Crane or Converter Charging Crane, is a specialized heavy-duty metallurgical crane purpose-built for charging scrap steel and auxiliary materials into converters and electric arc furnaces in steelmaking plants. Unlike a standard double girder overhead crane whose trolley moves only in straight lines, this crane's defining feature is a 270-degree rotating trolley mechanism that enables the lifting unit to rotate, precisely adjusting the angle and orientation of the scrap charging trough.

TECHNICAL DATA

Parameter Specification
Lifting Capacity 5 – 320 t (customizable）
Lifting Height 12 – 28.5 m (customizable）
Span 10.5 – 31.5 m (customizable）
Work Duty Class A7 – A8
Lifting Attachment Four-point twin gantry hook beam
Control Method Cabin / Pendant / Wireless Remote
Thermal Protection High fire-resistance and heat-resistance structural rating
Power Supply customizable

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APPLICATION

application
Integrated Steel Mills
application
Steelmaking Converter Operations
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Heavy Industrial Charging Operations
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Foundries & Iron Casting
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Metallurgical Scrap Handling
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Steel Scrap Recycling Facilities

FEATURES

1
270-Degree Rotating Trolley for Precision Feeding — The crane‘s defining function: an additional rotation mechanism on the trolley enables the lifting unit to rotate 270 degrees (extendable to 330 degrees on some models), with controlled starting and braking. This allows the operator to position the scrap trough close to the wall during standby—conserving workshop space—and then rotate the trough precisely to align the discharge port with the furnace opening when charging is required.
2
Four-Point Twin Gantry Hook Beam for Even Load Distribution — The dedicated lifting device consists of two gantry hook beam groups (front and rear), four pulley blocks, and four plate hooks. This configuration distributes the weight of the loaded scrap trough evenly across four lifting points, eliminating the need for manual ground-crew assistance during hooking and unhooking—a significant improvement in both efficiency and personnel safety.
3
Large-Angle Trough Tipping for Complete Material Discharge — The crane is engineered to tilt the scrap trough through an angle greater than 60 degrees, enabling all waste material to be discharged in a single continuous operation. This eliminates the need for multiple tipping cycles and ensures that the furnace receives the full charge without residual material remaining in the trough.
4
High-Temperature Fire-Resistant Design — The driver’s cabin and all structural components are engineered for the extreme heat environment adjacent to the converter, where the cabin sits close to a ladle covered in flames. The crane structure carries a high fire-resistance and heat-resistance rating, ensuring structural integrity and operator safety during continuous steelmaking operations.
5
Heavy-Duty Double-Girder Structure with A7–A8 Work Duty — Two parallel high-grade steel main girders provide the stability and load distribution required for handling heavy scrap troughs in continuous, high-intensity service cycles, with work duty ratings up to A8.
6
Smooth VFD-Controlled Operation — All motion axes are driven by variable frequency drives delivering stepless speed regulation, shock-free starts and stops, and precise load positioning—critical when aligning the discharge port with the furnace opening in confined spaces.

FAQ

Why is a 270° rotating trolley essential for scrap charging operations in steel mills?

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Steel mill melt shops and EAF/BOF charging bays often have tight space constraints and non-parallel furnace orientation relative to the crane runway. A 270° rotating trolley provides critical operational flexibility: Multi-Angle Ladle & Bucket Alignment: Allows the operator to turn scrap buckets, magnetic grabs, or charging boxes at any angle (±135°) to align perfectly with the furnace throat without re-positioning the entire bridge. Eliminating Dead Zones: Enables precise pickup of scrap steel from storage bins or railcars positioned obliquely in the scrap yard. Faster Charging Cycles: Significantly cuts down travel time and bridge maneuvering, helping steelmakers shave precious minutes off tap-to-tap cycle times.

How does the rotating trolley mechanism handle power transmission and signal transfer without twisting cables?

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To ensure continuous 270° rotation without line cable twisting or insulation fatigue, our rotary scrap charging cranes incorporate specialized rotary energy systems: Heavy-Duty Slip Ring Assembly (Collector Ring): High-amperage power slip rings and gold-plated signal slip rings are integrated into the central slewing axis, allowing uninterrupted electricity for hoisting motors, magnets, and PLC communications. Guided Energy Chains (Drag Chains): For systems with restricted angle rotation (e.g., ±135° limit switches), reinforced flexible drag chains are used to route hydraulic lines and fiber-optic cables safely. Absolute Encoder Positioning: Dual encoders continuously feed slewing angle data back to the cabin display and L2 system to prevent over-rotation.

How does the crane protect its structure from heavy mechanical impacts during scrap dumping?

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Scrap steel charging involves sudden weight releases, heavy vibrations, and asymmetric impact loads when tons of heavy scrap drop into the furnace: Damped Slewing Bearing & Buffer Springs: The upper slewing frame uses heavy-duty cross-roller slewing ring bearings coupled with spring-damped shock absorbers to attenuate vertical and torsional shock waves. Anti-Sway & Dynamic Anti-Derailment Wheels: The trolley is equipped with side guide rollers and heavy anti-drop retainers that hug the main girder rails, preventing trolley bounce or derailment during rapid dumping. Heavy-Duty Box Girder Design (A7/A8 Rated): Structural main beams are fabricated with extra internal stiffeners and fatigue-resistant submerged-arc welding to endure non-stop high-frequency shock loading.

Can this rotary feeding crane be integrated with automated weighing and auto-charging steelmaking systems?

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Yes. Modern scrap handling requires strict metallurgical recipe accuracy. Our rotary scrap charging overhead cranes fully support Smart Steel Mill integration: Integrated Load Cells: High-accuracy electronic weighing sensors are installed under the pulley blocks or slewing frame, offering real-time batch weighing (accuracy within ±0.5%) even during rotation. Steel Mill L2 / MES System Connectivity: Wireless industrial Wi-Fi/PROFINET transmits scrap weight, bucket ID, and charging timestamps directly to the furnace control room. Semi-Automated Positioning: PLC-assisted auto-slewing aligns the scrap bucket to pre-set dumping angles at the push of a single button, reducing operator fatigue.

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