Grab Overhead Crane for Coal Handling | Double Girder Grab Bucket Crane
Short Video Description
This video shows a grab overhead crane for coal handling and mine power plant material handling. The crane uses a double girder overhead crane design with an electric grab bucket for lifting, transporting and feeding bulk coal and other loose materials.
The grab bucket overhead crane is suitable for coal stockyards, power plants, mine material handling facilities, coal bunkers, hoppers and industrial workshops. The grab bucket picks up bulk material from the storage area and discharges it into a coal hopper, feeder, crusher or furnace feeding system.
For continuous coal handling crane operation, the crane duty class, grab bucket volume, material density, lifting capacity and working cycle must be selected together. A higher bucket volume does not necessarily mean a higher crane capacity because the actual lifted load depends on the bulk density of the coal or other material.
Yuantai engineers consider the crane capacity, grab bucket capacity, coal density, span, lifting height, working frequency, travelling distance, duty class, discharge position and environmental conditions when designing the complete grab crane system.
Main Technical Specifications
| Item | Technical Specification |
|---|---|
| Crane type | Double Girder Grab Overhead Crane / Grab Bucket Overhead Crane |
| Main application | Coal Handling Crane for mine, power plant and bulk material handling |
| Rated capacity | 5 – 50 ton+, customized according to maximum grab load |
| Crane structure | Heavy-duty double girder overhead bridge crane |
| Grab bucket | Electric grab bucket / hydraulic grab bucket, customized according to material |
| Grab bucket volume | 0.5 – 20 m³+, selected according to coal density and throughput |
| Span | 10 – 35 m+, customized according to the building or stockyard layout |
| Lifting height | 6 – 30 m+, customized according to hopper, bunker or storage height |
| Hoisting system | Electric wire rope hoist / open winch grab trolley |
| Hoisting speed | 3 – 12 m/min, customized according to working cycle |
| Trolley speed | 20 – 40 m/min, VFD available |
| Crane travelling speed | 20 – 40 m/min, customized |
| Duty class | ISO A6 – A8 / FEM 3M – 5M, according to working frequency |
| Control | Operator Cabin / Radio Remote / Pendant / PLC Control |
| Automation | Preset positions, PLC control, load monitoring, position control and semi-automatic operation available |
| Power supply | 380V / 50Hz / 3Ph standard; 400V, 415V, 440V, 460V and 60Hz available |
| Safety devices | Overload limiter, lifting limit switch, travel limit switches, emergency stop, buffers and warning alarm |
| Working environment | Coal handling areas, mine power plants, stockyards, bunkers and industrial workshops |
| Yuantai Crane engineering | The double girder crane, grab bucket, hoisting mechanism, travelling system and control system are engineered as one complete bulk material handling system. |
How Does a Grab Bucket Overhead Crane Handle Coal?
A grab bucket overhead crane uses a motorized grab to pick up loose coal from a stockpile, bunker or storage area. The hoisting mechanism raises the loaded grab, while the trolley and bridge crane move the material to the required discharge point.
The grab bucket then opens above a coal hopper, bunker, feeder, crusher or furnace and releases the material. The crane repeats the loading and discharge cycle according to the required coal handling throughput.
This makes the overhead grab crane suitable for repetitive coal loading and feeding operations where conventional hook cranes are not suitable for loose bulk materials.
Why Use a Double Girder Crane for Coal Handling?
A double girder grab crane provides a rigid bridge structure for heavy-duty bulk material handling. It is suitable for applications requiring frequent lifting cycles, large spans and higher grab bucket capacities.
- Heavy-duty double girder bridge construction
- Suitable for frequent coal handling cycles
- Compatible with large electric grab buckets
- Suitable for high lifting heights
- Suitable for coal stockyards and power plants
- Suitable for bunker and hopper feeding
- VFD control available for smoother positioning
- Cabin, radio remote and PLC control options
Coal Handling Crane: Grab Bucket Capacity vs Crane Capacity
The grab bucket capacity and the crane rated capacity are two different design parameters. A 10 m³ grab bucket, for example, does not automatically mean that the crane lifts 10 tons of material.
The actual grab load depends on the bulk density of coal, bucket volume, filling ratio and material condition. Yuantai engineers calculate the loaded grab weight before selecting the crane capacity and hoisting equipment.
| Parameter | Why It Matters |
|---|---|
| Coal density | Determines the approximate material weight inside the grab bucket. |
| Grab bucket volume | Determines how much bulk material can be collected per cycle. |
| Filling ratio | Affects the actual material quantity carried by each grab. |
| Crane capacity | Must safely support the total lifted load, including the grab attachment. |
| Working cycle | Determines the required duty class and crane operating frequency. |
Grab Overhead Crane for Mine and Power Plant Material Handling
A coal handling overhead crane can be installed in coal storage buildings, power plant bunkers and mine material handling areas. The crane can transfer coal from stockpiles to designated feeding points without requiring floor-level mobile equipment for every handling cycle.
For power generation facilities, the grab bucket crane can be integrated into the coal feeding process, including transfer between storage areas, hoppers and other bulk material handling equipment.
Key Design Factors for a Coal Handling Grab Crane
- Maximum coal weight per grab
- Coal bulk density
- Required grab bucket volume
- Coal particle size and material condition
- Crane span and lifting height
- Stockyard, bunker and hopper dimensions
- Required loading and discharge positions
- Required cycles per hour
- ISO/FEM duty classification
- Ambient temperature and dust conditions
- Required automation and control level
Smart Control Options for Coal Handling Cranes
For repetitive coal handling, the grab overhead crane can be equipped with intelligent control functions to improve positioning accuracy and reduce unnecessary operator movements.
| Control Function | Application |
|---|---|
| PLC control | Coordinates crane travel, trolley movement, hoisting and grab opening. |
| Radio remote control | Allows the operator to control the crane away from the immediate coal handling area. |
| Preset positions | Provides repeatable movement between stockpile, bunker and discharge locations. |
| VFD control | Provides smoother starting, stopping and material positioning. |
| Load monitoring | Helps monitor lifting load and prevent overload operation. |
| Anti-sway control | Reduces grab bucket swinging during crane travel. |
Typical Applications for Grab Bucket Overhead Cranes
A double girder grab overhead crane can be used for:
- Coal handling in power plants
- Mine material handling
- Coal stockyard loading
- Coal bunker feeding
- Hopper and feeder loading
- Furnace and boiler fuel feeding
- Bulk material storage
- Coke and mineral handling
- Industrial waste handling
- Heavy-duty workshop material feeding
How Yuantai Designs a Coal Handling Grab Overhead Crane
Yuantai engineers design the grab bucket overhead crane around the actual coal handling process rather than selecting the crane and grab independently.
- Confirm coal type and bulk density
- Determine maximum load per grab
- Calculate required grab bucket volume
- Select crane capacity and duty class
- Determine span and lifting height
- Confirm stockpile, bunker and hopper locations
- Select suitable electric or hydraulic grab bucket
- Check crane wheel loads and runway structure
- Configure VFD, PLC and control system
- Check environmental conditions in the coal handling area
This complete engineering approach helps match the coal handling crane with the required material flow, working cycle and site conditions.
FAQ: Grab Overhead Crane for Coal Handling
Common questions about grab bucket overhead cranes, coal handling cranes, double girder cranes, mine material handling and power plant coal feeding.
1. What is a grab overhead crane for coal handling?
A grab overhead crane for coal handling is a bridge crane equipped with a motorized grab bucket for lifting and transferring loose coal and other bulk materials.
It is commonly used in coal stockyards, mine power plants, coal bunkers, hoppers and bulk material handling facilities.
2. Why is a double girder overhead crane used for coal handling?
A double girder overhead crane provides a rigid bridge structure and is suitable for high-duty material handling applications with frequent lifting cycles and large grab buckets.
The final crane configuration depends on the required capacity, span, lifting height, grab load and operating frequency.
3. How do I choose the grab bucket capacity for coal?
The grab bucket capacity should be selected according to coal density, required load per cycle, filling ratio and required handling throughput.
Yuantai engineers calculate the loaded grab weight and then select the crane capacity and hoisting equipment accordingly.
4. Can a grab crane feed coal into a hopper or bunker?
Yes. A coal handling grab crane can pick up coal from a stockpile and discharge it into a hopper, bunker, feeder or other designated feeding point.
The crane travel range and lifting height should be designed around the actual storage and discharge locations.
5. What information is needed for a coal handling crane quotation?
Provide the coal density, maximum grab load, required bucket volume, crane capacity, span, lifting height, working frequency, travelling distance and discharge position.
A site layout showing the stockpile, coal bunker, hopper or feeder positions helps Yuantai engineers determine the required crane working envelope.
6. Can a grab overhead crane be automated for repetitive coal handling?
Yes. The crane can be equipped with PLC control, VFD drives, preset positions, load monitoring, radio remote control and semi-automatic functions.
The automation level depends on the required coal handling cycle and whether the crane operates between fixed stockpile, hopper and bunker locations.
7. What experience does Yuantai Crane have with grab and coal handling cranes?
Yuantai Crane has engineering experience with grab overhead cranes, grab bucket cranes, double girder overhead cranes, coal handling cranes and bulk material handling systems.
Yuantai engineers review the bridge structure, grab bucket, hoisting mechanism, trolley, crane travel, control system, material density and handling cycle together to develop a suitable solution for mine, power plant and industrial coal handling applications.
Need a Grab Overhead Crane for Coal Handling?
Send us your coal type, bulk density, maximum load per grab, grab bucket volume, crane capacity, span, lifting height, working frequency and site layout.
Yuantai Crane can engineer a double girder grab overhead crane and coal handling crane for mine power plants, coal stockyards, bunkers, hoppers, feeders and other heavy-duty bulk material handling applications.
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Article by Bella ，who has been in the hoist and crane field since 2016. Bella provides overhead crane & gantry crane consultation services for clients who need a customized overhead travelling crane solution.Contact her to get free consultation.
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