Secondhand 850 Hot Rolling Mill

Refurbished 850mm Hot Rolling Mill: Industrial-Grade Strip Production Solution

1. Industrial Capacity & Material Specifications

Production Scale

This hot rolling mill delivers 800,000 tons/year of precision hot-rolled coils – processing 8.2-ton billets into high-tolerance strips for automotive and construction sectors.

Raw Material Standards

Finished Product Metrics

2. Thermo-Mechanical Processing Technology

Multi-Stage Temperature Control

Reheating (1100-1300°C) → Roughing (1050-1150°C) → Finishing (850-950°C) → Laminar Cooling → Coiling (550-680°C)

Precision Control Systems

• Dual-Pressure Descaling: 250-bar water jets (pre-roughing + pre-finishing)

• Tension Stability: Inter-stand loopers with ±0.25% micro-tension

• Adaptive Cooling: 36-zone laminar flow (cooling rate: 18-50°C/sec)

• Thickness Control: Hydraulic AGC with 20ms response time

3. Refurbished Mill Technical Architecture

Core Components of This Used Hot Rolling Machine

• Rolling Configuration: 6-roughing + 7-finishing stands

• Drive Power: 5,500kW AC motors (Siemens/Sinamics platform)

• Automation: L2 process control with real-time thickness prediction

Refurbishment Certification

4. Economic Advantages vs. New Equipment

5. Verified Production Performance

Industry Application Cases

• Automotive Steel: DC04 (2.0×600mm)
  → Yield strength: 180±10 MPa · Elongation: 42%

• Structural Steel: S275JR (6.0×650mm)
  → Impact toughness: 27J @ -20°C

• Low-Alloy Steel: 345B (3.5×550mm)
  → Flatness tolerance: ≤3 I-units

6. Technical Support Ecosystem

Pre-Sales Engineering

• Material Trials: 300-ton test campaigns with quality certification

• Layout Optimization: 3D plant integration modeling

Post-Commissioning Guarantees