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Hot strip mill
In the furnaces of the hot-rolling mill, the slabs produced in the continuous casting line are heated to a temperature of approximately 1,250°C, before being rolled into hot-rolled wide strip. The finished material leaves the train (see diagram) at a maximum speed of 20 m/s.
Layout
|
01.) Slab roller table |
10.) Roughing train 11.) Cropping shear 12.) High-pressure water descaling 13.) Finishing train 14.) Runout table/strip cooling 15.) Downcoilers 16.) Transverse transport of coils 17.) Longitudinal transport of coils |
18.) Coil weighing machine 19.) Walking beam conveyer 20.) V-plate conveyer 21.) Shear for cropping and sampling 22.) Outer coil binding 23.) Binding through coil eye 24.) Finished coil weighing |
| 4 Reheating furnaces | |||
|---|---|---|---|
| Cpacity | 240 t/h | ||
| Fuel | natural and coke oven gas | ||
| 2 Walking beam furnace (Year of commissioning 2001 and 2009) | |||
| Type of heating | Walking beam furnace 5 (2001) | Walking beam furnace 6 (2009) | |
| 144 roof burners, | 144 roof burners, | ||
| 22 end burners, | 12 end burners, | ||
| 18 subzone burners | 26 subzone burners | ||
| Furnace length | 33,8 m | 33,8 m | |
| Lichte Breite | 13,6 m | 13,6 m | |
| 2 Pusher-type furnaces | |||
| Clear span | 166 roof burners, | ||
| 8 subzone burners, | |||
| Furnace length | 31,0 m | ||
| Clear span | 13,2 m | ||
| Hearth length | 16,0 m | ||
| Sizing press | |||
| Driving power | 4,4 MW | ||
| Sizing force | 22.000 kN | ||
| Sizing width | max. 320 mm | ||
| Roughing train (four-high with edger) | |||
| Edging stand | |||
| Edger rolls Ø | 1.100 - 1.000 mm | ||
| Driving Power | min. 2 x 1,5MW/max. 2 x 3,75MW | ||
| Rolling torque | max. 2 x 593 kNm | ||
| Rolling force | 6.000 kN | ||
| Horizontal stand | |||
| Backup roll Ø | 1.650 - 1.450 mm | ||
| Work roll Ø | 1.250 - 1.125 mm | ||
| Driving power | min. 2 x 8,5 MW/max. 2 x 20 MW | ||
| Rolling torque | max. 2 x 3.820 kNm | ||
| Rolling force | 55.000 kN | ||
| Finishing train (7 Stands) | |||
| Backup roll Ø | 1.525 - 1.375 mm | ||
| Work roll Ø | 760 - 670 mm | ||
| Finishing stand 2, 4 - 7 | Finishing stand 1 and 3 | ||
| Driving power | 2 x 3,3 MW | 2 x 14 MW | |
| Speed | max. 20 m/s | max. 20 m/s | |
| Roll gap setting system | Hydraulic | Hydraulic | |
| 3 Downcoilers | |||
| Coiler 1 and 2 | Coiler 3 | ||
| Outer coil Ø | max. 2.100 mm | max. 2.100 mm | |
| Mandrei Ø | 760 mm | 760 mm | |
| Coil weight | max. 32 t | max. 32 t | |
| Driving power | 1.100 kW | 1.850 kW | |
| Number of wrapper rolls | 3 | 3 | |
| Setting systems | Hydraulic | Hydraulic | |
| Coil binding line | |||
| automatic Coil binding | |||
| Product range | |||
| Thicknesses | 1,5 - 25,0 mm | ||
| Width | 900 - 2.000 mm | ||
| Steel grades | Feinblech- und Festigkeitsgüten | ||
| Kohlenstoffstähle bis C75 | |||
| Röhrenstähle bis X80 | |||
| Mehrphasenstähle | |||