Used 700 Strip Steel Hot Rolling Mill

This refurbished 700 mm width hot rolling mill delivers 600,000 t/year of precision strip steel (2-8mm ±0.15mm) with 40% capital savings – combining industrial-scale throughput, 98.5% material yield, and OEM-grade refurbishment for carbon/silicon steel applications.

Refurbished 700mm Hot Rolling Mill: High-Volume Precision Strip Production

1. Industrial-Scale Production Capabilities

This strip steel hot rolling mill achieves 600,000 tons/year of premium hot-rolled coils – processing 5.5-ton billets into narrow-gauge strips (350-600mm width) for demanding industrial applications. Engineered for continuous operation, it handles carbon steels, silicon steels (GB/T2521), and low-alloy grades (EN 10025) with uncompromising precision.

2. Raw Material & Product Specifications

Billet Input Parameters

Parameter	Specification
Dimensions	120×360mm to 180×600mm
Length	7,000mm (max)
Weight	5.5 tons (max)
Intermediate Thickness	25-35mm

Finished Product Standards

Attribute	Thickness 2-8mm	Thickness 4-8mm
Width Range	350-550mm	350-600mm
Coil ID/OD	Ø520mm / Ø1,600mm
Surface Quality	Ra ≤15μm
Flatness	≤5 I-units

3. Thermo-Mechanical Processing Advantages

Multi-Stage Temperature Control

Reheating (1200-1250°C) → Roughing (1050-1120°C) → Finishing (850-950°C) → Laminar Cooling → Coiling (550-650°C)

Critical Quality Systems

Dual Descaling: 220-bar high-pressure water jets (pre-roughing + pre-finishing)
Tension Control: Inter-stand loopers with ±0.3% micro-tension stability
Cooling Precision: 32-zone adaptive laminar flow (cooling rate: 15-45°C/sec)

4. Refurbished Mill Technical Architecture

Core Components of This Used Hot Rolling Machine

Rolling Stands: 5-roughing + 7-finishing configuration
Drive Systems: 4,500kW AC motors (Siemens S120 drives)
Automation: L1/L2 process control with AI-based gauge prediction

Key Refurbishment Upgrades

Component	Enhancement
Work Rolls	Reground to ≤0.005mm runout
Hydraulic AGC	Response time upgraded to 25ms
Coilers	Tension control ±1.5%
Sensors	Infrared pyrometers (±5°C accuracy)

5. Economic Advantages vs New Mills

Metric	This 700 mm Width Hot Rolling Mill	New Equivalent
Capital Cost	$2.8–3.5M	$7.2–8.5M
Installation Time	60 days	180 days
Energy Consumption	82 kWh/ton	110 kWh/ton
Material Yield	98.5%	96.8%
ROI Period	22 months	60 months

6. Industry Application Performance

Verified Production Cases

Electrical Steel: 0.35mm silicon steel (B35A250)
→ Core loss: 2.8W/kg @ 1.5T/50Hz
Automotive Strip: SAE 1008 (2.75×480mm)
→ Yield strength: 280±15MPa
Structural Alloy: S355JR (6.0×550mm)
→ Impact toughness: 40J @ -20°C

7. Technical Support Ecosystem

Pre-Sales Engineering

Material Trials: 200-ton test campaigns
Integration Planning: Mill-to-coiling layout optimization

Post-Commissioning Guarantees

24/7 Remote Monitoring: IoT-enabled vibration/temperature tracking
Training Programs: Level 1-3 operator certification
Spare Parts: 10-year availability guarantee (rolls, sensors, valves)

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