The Rose Corporation recently fabricated charging buckets for a local specialty steel manufacturer.
Charging buckets are used to load scrap into an electric arc furnace. Charging buckets are sized by volume and diameter. A charging bucket is transported by an overhead crane using its main hook. It uses a special lifting bale that is opened and closes by a second auxiliary hook. A charging bucket must be sized so that it fits inside the top ring of an electric arc furnace.
Here is a video of a charging bucket loading 75 tons of scrap steel into an electric arc furnace:
The buckets are designed for an even spread of scrap over the bed of the furnace. Constructed of heavy steel plate, bars and rolled shapes. Bottom doors, fabricated of dished plate allow the bucket to sit on the floor without special auxiliary supports.
Here is a detail of the welding on the bottom doors:
3 clam shell charging buckets were fabricated. One 600 cubic foot capacity, 9 feet in diameter, 10 feet tall, and two 265 cubic foot capacity, 7 feet in diameter and 7 feet tall.
Here is the largest charging bucket being machined on a Giddings & Lewis horizontal boring mill with a 7 inch spindle:
Each charging bucket required an average of 70 hours welding, 50 hours of fitting, and 40 hours of machining each. Here is a detail of the machining work:
The Rose Corporation is a Pennsylvania-based, WBENC-certified small business specializing in the manufacture of custom industrial fabrication, large-scale precision weldments, power generation equipment (including repairs), and more. The Rose Corporation’s most unique strength is our experience with delivery of specialized design expertise, along with an ability to help customers optimize manufacturability, reduce costs, and improve overall product quality.