| Parameter | Value | Advantage Description |
|---|---|---|
| Manufacturer | Henan Tailong | Well-known domestic manufacturer, reliable quality |
| Manufacturing Year | 2014 | Mature and stable, proven technology |
| Major Components Replaced | 2018 (controls, motor, gearbox) | Core parts relatively new, 7–10 years remaining life |
| Shutdown Date | Dec. 2025 | Recently stopped, not long-idle, good condition |
| Annual Capacity | 0.18-0.36 MTPA | Substantial capacity for mid-scale rolling mills |
| Main Motor Power | 1500kW × 1 | Ample power for high reduction rolling |
| Recoiler Motor Power | 1500kW × 1 | High winding tension for tight, uniform coils |
| Uncoiler Motor Power | 1500kW × 1 | Stable back tension, prevents strip slack |
| Number of Rolls | 20 | High-precision thin strip capability, high rigidity |
| Straightener Rolls | 5 | Improves strip flatness and quality |
| Designed Material | MS (Mild Steel) | Suitable for mainstream cold rolling applications |
| Max Designed Width | 1050 mm | Wide rolling capability for medium-width strips |
| Max Input Thickness | 3.0 mm | Can directly roll hot-rolled pickled coils |
| Min Designed Thickness | 0.07 mm | High-precision thin strip design capability |
| Actual Min Thickness | 0.07 mm | Proven stable thickness in production |
| Rolling Speed | 800 m/min | High speed, high efficiency for continuous production |
| Max Rolling Force | 3500 KN | High deformation capability |
| Working Roll Size | Φ59/65 × 1320 mm | Small diameter, ideal for ultra-thin strips |
| First Intermediate Roll | Φ99/103 × 1320 mm | Reasonable diameter transition, uniform force transfer |
| Second Intermediate Roll | Φ169/173 × 1320 mm | Further distributes rolling force |
| Backup Roll Size | Φ320 × 1350 mm | Large diameter, good rigidity, high load capacity |
| Screw-down Type | AGC | High-precision automatic thickness control |
| Coiling Method | Collapsible drum | Easy coil removal, adapts to different inner diameters |
| Control System Brand | Schneider + Inovance | Well-known brands, stable and reliable |
| Control System Condition | Good | No missing parts, ready for use |
Manufactured by Henan Tailong, a well-known Chinese company specializing in 20-Hi and reversible rolling mills.
Tailong equipment is known for reasonable structure, stable operation, and easy maintenance with many successful installations.
Electric controls, motors, and gearbox were systematically replaced in 2018 – only about 7 years of operation as of shutdown.
Replaced core components typically have 10+ years of remaining service life.
Shut down in December 2025 – a “freshly decommissioned” used asset, not long-idle.
Continuous production until shutdown confirms all systems are functional with no major faults.
Annual capacity of 180,000–360,000 tons – suitable for mid-scale cold rolling enterprises.
Can serve as either a primary production unit or a capacity expansion addition.
Main, recoiler, and uncoiler motors are all 1500kW, total installed power 4500kW.
Same power rating simplifies spare parts management and reduces inventory costs.
Equal recoiler/uncoiler power indicates balanced tension control for reversible rolling.
The 20-high configuration is the industry standard for thin strip rolling.
Small work roll diameter (only Φ59/65 mm) offers:
Low contact stress for ultra-thin strips
Uniform rolling force distribution for better shape control
Minimum finished thickness of 0.07 mm (97.7% reduction)
Four-tier roll system: Work Roll → 1st Intermediate → 2nd Intermediate → Backup Roll.
Roll diameters increase progressively (Φ59 → Φ99 → Φ169 → Φ320 mm) for smooth force transfer.
Barrel lengths (1320–1350 mm) are well-matched to the 1050 mm rolling width.
Maximum width 1050 mm – covers mainstream products like appliance panels, hardware strips, and construction sheets.
Maximum speed 800 m/min – medium-to-high range for 20-Hi mills, delivering high efficiency with good shape control.
Maximum rolling force 3500 KN (approx. 357 tons) – sufficient to reduce 3.0 mm mild steel to 0.07 mm in 3–5 passes.
High rolling force also enables processing of higher-strength materials (e.g., low-alloy high-strength steel).
AGC system detects entry/exit thickness in real time and automatically adjusts rolling force or roll gap.
With high-precision thickness gauges, tolerances can be controlled within ±0.002 mm – meeting strict requirements for appliances, electronics, and automotive applications.
A 5-roll straightener is located at the mill exit to eliminate shape defects (waves, warpage) caused by rolling.
Straightened strips have significantly improved flatness for easier slitting, packaging, or direct sale.
The collapsible drum allows diameter variation within a certain range.
Advantages:
Drum contracts during threading for easy strip insertion
Drum contracts during unloading for easy coil removal
Adapts to different inner diameters (Φ508 mm or Φ610 mm)
Control system supplied by Schneider and Inovance – both well-known brands.
System condition is good with no missing parts – ready for immediate use or minor commissioning.
The Schneider PLC + Inovance drive combination is widely used in metallurgy, with mature technology and readily available spare parts.
Designed width 1050 mm = Actual width 1050 mm
Designed input thickness 3.0 mm = Actual input thickness 3.0 mm
Designed min thickness 0.07 mm = Actual min thickness 0.07 mm
Complete alignment between design and actual values – no specification inflation.
Manufactured in 2014, core parts renewed in 2018, shut down in late 2025 – moderate overall usage.
Used equipment price is typically 20%–30% of a new 20-Hi mill (which costs several million RMB).
Based on 180,000 tons/year capacity and RMB 500/ton processing fee, annual revenue reaches RMB 90 million – extremely short payback period.
