Rolling a wide range of high-quality flat steel products
HBIS Laoting Iron & Steel is operating a high-performance hot strip mill (HSM) being supplied by SMS group. The wide product mix covers low-alloyed carbon steels, high-strength automotive grades, weathering-resistant structural steel, pipe grades, boiler and pressure vessel grades, ship building steel and steel for heavy structures in bridge building.
The hot strip mill is designed for an annual capacity of 4.1 million tons of hot rolled coils with a maximum width of 1,900 millimeters and final thicknesses ranging from 1.2 to 25.4 millimeters. The product mix covers an extremely wide material range including mild steel as well as high-strength steel and steel for heavy structures.
The HSM features latest equipment, such as a slab sizing press at the entry of the roughing mill, which allows idth reductions of up to 350 millimeters, enabling swift and efficient responding to customer requests using slabs on stock and more effective production planning in the upstream steel plant.
The two roughing mill stands assure high production flexibility and, in combination with the edger attached to the second roughing stand, tightest width tolerances.
The seven-stand finishing mill features high-precision adjustment of the strip profile, contour and flatness is performed by the proven CVC® plus system with integrated work roll bending.
The latest generation laminar cooling section, arranged at the run-out of the finishing mill, boasts the capacity and flexibility to cover a wide range of cooling rates and strategies to set the required mechanical properties within tight tolerances and to fulfill even future market demands. The flow-controlled higher water rates towards the end of the cooling section enable reliable and repeatable production of multi-phase grades.
Three downcoilers complete the HSM, one of which is a Uni Plus coiler designed to handle high-strength strips of thick gauges.
Impressions
Main data
- Material: Deep drawing and super deep drawing, structural steel, high-strength steel, automobile structure steel, high weather resistant structure and container steel, pipeline and ship steel, boiler and pressure vessel steel, bridge steel
- Slab width: 900–1,900 mm
- Slab length: 9,000–11,000 mm
- Slab thickness: max. 250 mm
- Transfer bar width: 900–1,900 mm
- Transfer bar thickness: 30–70 mm
- Strip width: 900–1,900 mm
- Strip thickness: 1.2–25.4 mm
- Coil weight: max. 36.5 t
- Capacity: 4.1 million t/year