Detailed Equipment Introduction: 4-Stand 4-Hi 850mm Tandem Cold Rolling Mill
1. General Overview
This 4-Stand 4-Hi 850mm Tandem Cold Rolling Mill, manufactured in April 2013 by Wuxi Dalishen, is a modern continuous rolling solution for mild steel production. Production ceased in 2015, indicating relatively low operating hours and good remaining service life. The equipment is supplied by Keepwin Industry with comprehensive support services.
2. Key Technical Specifications
| Category | Parameter | Specification |
|---|
| General Information | Manufacturer | Wuxi Dalishen |
| Manufacturing Date | April 2013 |
| Production Ceased | 2015 |
| Mill Type | 4-High Tandem |
| Number of Stands | 4 |
| Rolls per Stand | 4 (2 work rolls + 2 backup rolls) |
| Power and Drive | Main Motor Power | 1,000 kW per stand |
| Number of Motors | 5 (4 stands + 1 coiler/auxiliary) |
| Total Installed Power | 5,000 kW |
| Product Dimensions | Max. Strip Width | 750 mm |
| Min. Finished Thickness | 0.6 mm (with 4 stands) |
| Roll Specifications | Work Roll Size | Ø225 × 850 mm |
| Backup Roll Size | Ø700 × 820 mm |
| Performance | Max. Rolling Speed | 300 m/min |
| Max. Rolling Force | 750 tons per stand |
| Screw-down System | Hydraulic AGC |
| Rolled Materials | Designed Materials | Mild Steel (MS) |
| Control System | Electrical Control | Requires replacement |
| Spare Parts | Spare Parts Package | 50 tons included |
3. Key Features and Advantages
| Feature | Description |
|---|
| 4-Stand Tandem Configuration | Single-pass reduction for high productivity |
| Modern Manufacture | 2013 equipment with contemporary design |
| Limited Operation | Production ceased 2015 – low operating hours |
| Powerful Drive | 5,000 kW total installed power |
| Hydraulic AGC | Precision thickness control on each stand |
| Proven Capability | 750mm width, 0.6mm minimum thickness |
| 50-Ton Spare Parts | Extensive inventory included |
4. Equipment Status
| Component | Status | Implication |
|---|
| Mechanical Equipment | Good condition | Reliable foundation, long remaining life |
| Electrical Control System | Requires replacement | Opportunity for modern automation upgrade |
| Spare Parts | 50 tons included | Reduced future costs, immediate availability |
5. Support Services Available
| Service | Availability |
|---|
| Disassembly Services | Available (cost to be confirmed) |
| Refurbishment Services | Available (cost to be confirmed) |
| Installation Support | Available |
| Electrical Upgrade Support | Available |
6. Summary
This 4-Stand 4-Hi 850mm Tandem Cold Rolling Mill offers a modern mechanical foundation with limited operating history, 5,000 kW drive power, hydraulic AGC, and an included 50-ton spare parts package. The electrical system requires replacement, presenting an opportunity to upgrade to current automation technology. Complete with professional support services, this is a cost-effective solution for expanding cold rolling capacity.
