550mm Hot rolling mill
I. Equipment Overview
This 550mm hot rolling mill is a comprehensive hot strip production line manufactured by Hebei Tianze in 2010. The equipment features a complete configuration including a roughing mill, two edgers, and eight finishing stands, designed for efficient production of mild steel and low carbon alloy steel strips. The production line can process slabs into high-quality hot-rolled coils with thickness ranging from 1.3mm to 5.7mm and width from 145mm to 380mm.
II. Core Parameters
2.1 Basic Parameters
| Item | Parameter | Remarks |
|---|---|---|
| Equipment Name | 550mm Hot Rolling Mill | Complete Production Line |
| Manufacturer | Hebei Tianze | - |
| Start-up Year | 2010 | - |
| Rolling Materials | Mild Steel, Low Carbon Alloy Steel | - |
| Coil Weight | 2.3 Tons | - |
2.2 Slab Specifications
| Item | Specification | Remarks |
|---|---|---|
| Slab Size | 150 × 150 mm | Square billet |
| 165 × 165 mm | Square billet | |
| 165 × 280 mm | Rectangular billet | |
| Slab Length | 6000 - 8000 mm | - |
2.3 Finished Product Specifications
| Item | Specification | Remarks |
|---|---|---|
| Finished Width | 145 - 380 mm | - |
| Finished Thickness | 1.3 - 5.7 mm | - |
| Coil Weight | 2.3 Tons | - |
III. Mill Configuration
| Section | Configuration | Number of Stands | Description |
|---|---|---|---|
| Roughing Mill (RM) | 3-Hi | 1 stand | R1 - 3-high roughing mill |
| Edgers (E) | Edger | 2 stands | E1, E2 - Edge rolling |
| Finishing Mills (FM) | 2-Hi | 3 stands | F1, F2, F3 - 2-high finishing |
| 4-Hi | 5 stands | F4, F5, F6, F7, F8 - 4-high finishing | |
| Total Stands | - | 11 stands | Complete rolling line |
IV. Roll Specifications Summary
| Roll Type | Specifications | Applications |
|---|---|---|
| Roughing Mill Roll (BUR) | Φ630/580 mm × 1800 mm | R1 stand |
| Edger Roll (BUR) | Φ520/470 mm × 220 mm | E1, E2 stands |
| 2-Hi Finishing Roll (BUR) | Φ520/460 mm × 550 mm | F1, F2, F3 stands |
| 4-Hi Work Roll (WR) | Φ335/300 mm × 550 mm | F4-F8 stands |
| 4-Hi Backup Roll (BUR) | Φ550/510 mm × 550 mm | F4-F8 stands |
V. Equipment Highlights
⭐ Complete Production Line Configuration
Total of 11 rolling stands: 1 roughing mill (3Hi), 2 edgers, 8 finishing mills
Finishing section includes 3 stands of 2-Hi and 5 stands of 4-Hi configuration
Comprehensive line for efficient hot strip production
Suitable for various steel grades including mild steel and low carbon alloy steel
⭐ Powerful Drive System
Roughing mill main motor: 2200kW, 400V
Eight finishing mill motors: 1150kW each, total finishing power 9200kW
Edger motors: 220kW each for precise width control
Total installed power exceeds 12,000kW
⭐ Flexible Slab Processing
Accepts multiple slab sizes: 150×150mm, 165×165mm, 165×280mm
Slab length range: 6000-8000mm
Capable of processing various billet dimensions
High productivity with 2.3-ton coil weight
⭐ Wide Product Range
Finished product width: 145-380mm
Finished thickness range: 1.3-5.7mm
Suitable for multiple applications in construction, manufacturing, and automotive industries
Produces high-quality hot-rolled strips
⭐ Advanced Roll Configuration
Roughing mill: 3-high design for efficient breakdown of slabs
Edgers: Precise width control with 220mm barrel length
Finishing mills: Combination of 2-high and 4-high stands
4-high stands feature work rolls (Φ335/300mm) and backup rolls (Φ550/510mm)
All finishing stands have 550mm barrel length for consistent rolling width
⭐ Optimized Speed Ratios
Progressive speed ratios from roughing to finishing:
R1: 5.7
F1: 10.5 (highest reduction)
F2: 7.5
F3: 5.15
F4: 2.75
F5: 1.95
F6: 1.5
F7-F8: 1.0 (final sizing)
Designed for optimal material flow and tension control
Ensures consistent product quality across all thicknesses
⭐ Reliable Equipment Condition
Manufactured in 2010 by Hebei Tianze, a reputable Chinese manufacturer
Well-maintained during operational period
Complete line with all stands and motors
Ready for inspection and purchase
⭐ High Production Efficiency
Processes slabs up to 8 meters in length
Produces 2.3-ton coils for downstream processing
Multiple finishing stands ensure high throughput
Suitable for medium-scale hot strip production
VI. Summary
This 550mm hot rolling mill represents a complete and well-configured production line for hot-rolled strips. Manufactured by Hebei Tianze in 2010, the line features 11 rolling stands including a 3-high roughing mill, two edgers for width control, and eight finishing mills (three 2-high and five 4-high stands). The powerful drive system, with a 2200kW roughing motor and eight 1150kW finishing motors, ensures efficient processing of mild steel and low carbon alloy steel slabs. The mill can process slabs of various sizes (150×150mm, 165×165mm, 165×280mm) into finished coils with thickness ranging from 1.3mm to 5.7mm and width from 145mm to 380mm. With its comprehensive configuration, optimized speed ratios, and proven reliability, this hot rolling mill is an excellent choice for investors looking to establish or expand their hot strip production capabilities.
