Flat rolling complex with 6-high and 4-high skin-pass mills
SMS group supplied three inline skin-pass mills for the new flat steel complex of Shandong Iron & Steel Rizhao. The ISPM are each integrated into the exit areas of a hot-dip galvanizing line and two annealing lines.
The produced cold strip is completely finished in two annealing lines and one hot-dip galvanizing line. All three lines are equipped with an inline skin-pass mill in the exit area. The annealing lines are 6-high, while the skin-pass function in the hot dip galvanizing line is performed by a 4-high. The skin-pass mills of the annealing lines are largely identical. They differ in terms of the strip width and thickness ranges they process. On the other hand, the 4-high skin-pass mill can process any strip dimensions and qualities. In all three mills, the roll change in the push-through operation can be done with the threaded strip, thus reducing the downtime and ensuring high productivity.
The dimensioning of the back-up rolls is identical in all three designs, which simplifies the handling and the provision of rolls.
Impressions
Main data
CAL 1880
- Mill type: CVC<sup>®</sup> plus 6-high
- Material: CQ, DQ, DDQ, EDDQ, SEDDQ, CQ-HSS, DQ-HSS, DP, TRIP
- Strip thickness: 0.4 – 2 mm
- Strip width: 1,000 – 1,880 mm
- Rolling speed (max.): 820 m/min
- Capacity: 950,000 t/year
CAL 1630
- Mill type: CVC<sup>®</sup> plus 6-high
- Material: CQ, DQ, DDQ, EDDQ, SEDDQ, CQ-HSS, DQ-HSS, DP, TRIP
- Strip thickness: 0.3 – 2.5 mm
- Strip width: 900 – 1,630 mm
- Rolling speed (max.): 820 m/min
- Capacity: 650,000 t/year
CGL
- Mill type: 4-high
- Material: CQ, DQ, DDQ, EDDQ, SEDDQ, CQ-HSS, DQ-HSS, DP, TRIP
- Strip thickness: 0.3 – 2.5 mm
- Strip width: 900 – 1,880 mm
- Rolling speed (max.): 220 m/min
- Capacity: 400,000 t/year