Integrated Hot Strip Rolling and Finishing System

Product Specifications

Technical details and manufacturing context for Integrated Hot Strip Rolling and Finishing System

Definition

This integrated system encompasses the complete downstream process chain following continuous casting or slab reheating. It sequentially reduces steel slab thickness through multiple rolling stands while maintaining precise temperature control, then processes the resulting strip through controlled cooling and coiling operations. The system is engineered for high-volume production of hot-rolled steel coils with consistent mechanical properties and dimensional accuracy. It represents a critical capital investment for steel mills producing flat products for automotive, construction, and manufacturing applications. The system integrates mechanical, electrical, and control subsystems to manage the entire rolling process, from slab entry to coil exit. Key components include a slab reheating furnace, roughing mill, finishing mill, laminar cooling system, and downcoiler. The rolling stands are equipped with hydraulic gap control and work roll bending for precise thickness and profile control. The cooling system uses multiple headers to achieve controlled cooling rates, influencing metallurgical properties. The coiler ensures tight, uniform coils. The system is designed for high availability and maintainability, with modular components and diagnostic tools. It is typically configured to handle a range of slab widths and thicknesses, producing coils for various downstream applications. The system's performance is characterized by parameters such as maximum slab width, minimum strip thickness, maximum coil outer diameter, annual production capacity, main drive motor power, cooling water flow rate, rolling speed, thickness and width tolerances, coiling temperature control accuracy, electrical supply voltage, control system IP rating, operating temperature range, and total installed weight. These parameters are provided as reference ranges and must be verified for specific installations. The system complies with relevant ISO and IEC standards for dimensional tolerances and electrical safety, but certification must be confirmed with the manufacturer. This directory entry is for informational purposes only and does not constitute an endorsement or guarantee of performance.

Working Principle

Heated steel slabs are progressively reduced in thickness through a series of rolling stands with synchronized speed control, then cooled under controlled conditions before being wound into coils of specified dimensions. The process begins with slab reheating to a uniform temperature, followed by descaling and rough rolling to break down the cast structure. The transfer bar then enters the finishing mill, where multiple stands reduce thickness to the target gauge. Throughout rolling, temperature is monitored and adjusted via interstand cooling and speed control. After the finishing mill, the strip passes through a laminar cooling system on the run-out table, where water is applied to achieve the desired cooling profile and metallurgical phase transformation. Finally, the strip is coiled at a controlled temperature to ensure consistent mechanical properties across the coil. The entire sequence is coordinated by a process control system that adjusts setpoints in real time based on feedback from sensors.

Common Materials

High-strength alloy steel, Refractory ceramics, Copper alloys

Technical Parameters

Parameter	Typical range	Notes & selection driver
Maximum Slab WidthRequired	900–1900 mm	Maximum width of incoming steel slab
Minimum Strip ThicknessRequired	1.2–12.7 mm	Minimum achievable thickness of finished hot-rolled strip
Maximum Coil Outer DiameterRequired	2000–2200 mm	Maximum outer diameter of finished coil
Annual Production CapacityRequired	2.5–4.5 tons/year	Designed annual production capacity
Main Drive Motor PowerRequired	2×9–2×12 kW	Total installed power of main rolling drive motors
Cooling Water Flow Rate	8000–12000 m³/h	Maximum cooling water circulation capacity
Rolling Speed (Max)	20–25 m/s	Limited by strip stability and cooling
Strip Thickness Tolerance	±0.05 mm	For finished strip at 1.2–4.0 mmISO 9444
Strip Width Tolerance	0–+20 mm	For hot-rolled stripISO 9444
Coiling Temperature Control Accuracy	±20 °C	Critical for mechanical properties
Electrical Supply Voltage	10–35 kV	Medium voltage for main drivesIEC 60038
Control System IP Rating	IP54–IP65	For electrical enclosures in mill environmentIEC 60529
Operating Temperature Range	-40–85 °C	For sensors and control components
Total Installed Weight	12000–18000 t	Includes mechanical and electrical equipment

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Reheating Furnace
Heats steel slabs to optimal rolling temperature

Material: Refractory lined steel structure
Roughing Mill Stands
Initial thickness reduction of heated slabs

Material: High-strength forged steel
Finishing Mill Train
Precise thickness reduction to final dimensions

Material: Alloy steel with hardened rolls
Laminar Cooling System
Controlled cooling of strip to achieve desired metallurgical properties

Material: Stainless steel headers and piping
Downcoiler
Winds finished strip into tightly wound coils

Material: Heavy-duty alloy steel
Automation Control System
Coordinates all system components and process parameters

Material: Industrial-grade electronics and enclosures

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Integrated Hot Strip Rolling and Finishing System.

Manufacturers of Integrated Hot Strip Rolling and Finishing System

Manufacturer profiles associated with Integrated Hot Strip Rolling and Finishing System.

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Frequently Asked Questions

What is the typical range for maximum slab width?

According to the directory data, the maximum slab width ranges from 900 to 1900 mm. This is a reference range; the actual capability depends on the specific system configuration and must be confirmed with the manufacturer.

What standards are referenced for strip thickness and width tolerances?

The directory lists ISO 9444 for both strip thickness tolerance (±0.05 mm for 1.2–4.0 mm strip) and strip width tolerance (0 to +20 mm for hot-rolled strip). These standards serve as procurement references; compliance must be verified with the supplier.

What is the designed annual production capacity?

The annual production capacity is listed as 2.5–4.5 million tons per year (unit: tons/year, value: 2.5–4.5). This is a reference range and actual capacity depends on product mix and operational practices.

What is the total installed weight of the system?

The total installed weight, including mechanical and electrical equipment, is listed as 12,000–18,000 metric tons. This is a reference range; the exact weight varies with system configuration and must be confirmed with the manufacturer.

Data Basis

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Preliminary Technical Classification

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pressure:	Up to 300 bar (hydraulic systems)
flow rate:	Variable based on line speed (0.5-25 m/s strip velocity)
coil weight:	Up to 45 metric tons
temperature:	900-1250°C (slab heating to rolling)
annual capacity:	1-6 million tons depending on configuration
max slab dimensions:	300mm thick × 2500mm wide × 12000mm long
slurry concentration:	Not applicable (dry rolling process)