Zaporizshstal 1680 mm Coilbox™

Shortest time between coils

Less than 5 seconds gap-time capability to deliver coils to the FM

Custom foundation Coilbox™

Challenges

Zaporizhstal was modernizing its hot strip mill (HSM) with new reheat furnaces able to handle larger slab lengths while smaller existing furnaces continued to handle small slabs.
The mix of slab sizes created the need for a Coilbox™ that could roll the larger slabs and handle smaller ones with as little as 5 seconds between bars at the finishing mill.
The older HSM had a very shallow mill flume and a mostly manual operation, creating additional challenges.

With a custom-designed, mandrelless Coilbox™, Zaporizhstal was able to coil and uncoil small and large transfer bars, maintaining a gap at the finishing mill of less than 5 seconds.
The thermal advantages of the Coilbox™ were achieved with the mandrelless transfer design, high processing speeds in the Coilbox™, and the implementation of energy-saving heat shields.

The Zaporizhstal Coilbox™ can deliver coils to the finishing mill with the shortest gap-time: less than 5 seconds.
The Zaporizhstal Coilbox™ has a small foundation footprint compared with mandrelless transfer coilboxes.

5-second delivery intervals between coils at FM
5 kg/mm small coils can be processed