In steelmaking equipment, the scrap bucket is a device for loading scrap steel, used to inject scrap steel into the steelmaking furnace. The steel bucket mainly has two types: bottom opening feeding and mouth dumping feeding.
Scrap charging buckets are Constructed of heavy steel plate, bars and rolled shapes. They are used for electric arc furnace charging from top -which are designed for an even spread of scrap over the bed of the furnace. Bottom doors, fabricated of dished plate are waffled for added strength and allow the bucket to sit on the floor without special auxiliary supports. Cylinder body of rolled plate is welded inside and out. Main bails are of heavy duty construction or for long life - ease of operation. A spreader beam type auxiliary bail and guides, keep the door operating cables from wearing against the bucket.
The scrap bucket bottom usually is a clam shell design-i.e. the bucket opens up by retracting two segments on the bottom of the bucket.Some large-tonnage bottom-opening OEM furnace parts do not match the ferroalloy melting fumace incaliber, resulting in more material perpendicular to the opening direction and uneven fabric. Uneven fabric sometimes causes scrap to stick to the lining, affecting the life of the lining; sometimes it will cause the scrap to fall on the under-railrail, affecting the normal operation of the under-vehicle, increasing the workload of the operator.
| Item | Typical Value / Range | Remarks |
| Bucket Type | Bottom-Dump (Clamshell / Drop-bottom), Tilt-Type | Bottom-dump is standard for large EAF charging |
| Rated Capacity (Weight) | 3 T ~ 100 T+ (Scrap Payload) | Matches the furnace charge weight per heat |
| Volume Capacity | 2 m³ ~ 65 m³ (approx. 3~85 cu.yd) | Depends on scrap density (light vs. heavy scrap) |
| Shell Inner Diameter | 2,000 mm ~ 4,500 mm+ | Must fit within the furnace delta region/dome opening |
| Overall Height | 2,500 mm ~ 6,000 mm+ | Including lifting bale/trunnion height |
| Shell Material | Thick Steel Plate (e.g., Q235B, SS400, Hardox) | Thickness 10 mm ~ 30 mm+; often with wear liners |
| Bottom Door Type | Waffle-plate / Dished-plate / Flat with ribs | Reinforced to withstand impact during filling |
| Door Opening Mechanism | Auxiliary Bail (Crane hook), Hydraulic, Mechanical | Auxiliary bail is common: main hook lifts, aux hook opens |
| Lifting / Suspension | Twin Bails (Main + Aux), Trunnions, Single Bail | Main bail for lift; Aux bail for opening bottom doors |
| Target Furnace | EAF (Electric Arc Furnace), Induction Furnace | Dimensions customized to furnace mouth/spout |
| Empty Bucket Weight | 3,000 kg ~ 25,000 kg+ | Depends on capacity and structural reinforcement |
| Design Safety Factor | 5:1 (Minimum) | Structural engineering standard for lifting devices |
| Filling Method | Grapple Crane, Loader, Magnet Crane |
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