Metinvest Trametal rolling mill is a quarto universal reversing mill with automatic gauge control and it is designed for production of 600 ktonnes/year.
In its yard Metinvest Trametal may store up to 80.000 tons of material.
Production process starts from steel slabs, most part of which come from Azovstal Iron and Steel Works. At the plant slabs are flame cut to the size related to the final dimensions of the plate to be produced.
Reheating furnace: pusher furnace (KWAERNER)
The slabs are reheated in one 3 ways pusher furnace which operates with natural gas.
After exiting from the reheating furnace, slabs move through descaling station for water scale removal under pressure of 220 bars.
Quarto reversing rolling mill (DANIELI)
Slabs are then rolled by a quarto reversing mill where they pass forth and back between the rolls in order to reduce the thickness. The number of passes depends on the initial thickness of the slabs and on the dimension of the plate and it is calculated automatically by the automation system.
- start up: February 2003
- rolling pressure: 4000 tons
- range: 4-180 mm in thickness, up to 3250 mm in width
Accurate thickness tolerances are guaranteed through a sophisticated on line x-ray gauge meter.
Hot leveller (SACK)
When coming out from the rolling mill, the plate levelling is made automatically on hot leveller on line.
After the levelling, every plate is marked with paint.
Hot oil-dynamic cross shear (POWELL)
Head and tails and possible submultiples of the plate are cut on line up to 40 mm thickness. For plates exceeding 40 mm thickness, the cut is performed at a later stage by oxy cutting.
Cooling bed (OCN)
The plates up to 49 mm thickness are left on the cooling bed (walking beam type) for cooling and then are inspected in surface and dimensions.
The plates, if requested, may be punched by two on line (thickness49 mm).
Plates are marked with sticky tax on the surface and edges. During the production process from daughter slabs to be rolled to the final shipment, products are controlled with bar code tag.
Edges (SALDOTECNICA, SATO, MESSER)
The plates are normally supplied with edges as rolled.
On request plates can be delivered cut edges with cutting made off line.
Heat treatment (KWAERNER, PRISMA)
Plates (up to 24000 mm length, 3250 mm width) can be supplied with different types of heat treatments (normalized in furnace, normalized and tempered, annealed) according to applicable norms and/or customer specification using a roller type furnace.
Plates may be delivered shotblasted if requested.