Detailed Equipment Introduction
1. Project Background & General Overview
This offering features a well-maintained 6-High 1450mm Cold Rolling Mill, originally manufactured in October 2009. Having been in operational use, this mill represents a mature and reliable asset, proven in a production environment. It is now available as a complete solution for a new owner, offering significant value and immediate production capability. The equipment is supplied by Keepwin Industry, a specialized provider of used metallurgical solutions, ensuring professional support throughout the transaction and beyond.
2. Mill Type, Capacity, and Materials
The core of this line is a advanced 6-High cold rolling mill stand. This configuration, utilizing work rolls, intermediate rolls, and backup rolls, provides exceptional rigidity and precise control over the rolling gap, essential for producing high-quality strip with tight tolerances. The mill is specifically designed to process Hot-Rolled Pickled Coils and Low Alloy Structural Steel, making it versatile for various applications.
With a formidable maximum rolling force of 18,000 KN, the mill is capable of significant reductions and can handle demanding schedules. This robust construction ensures long-term durability and consistent performance under high-load conditions.
3. Product Dimensional Specifications
The mill is designed to accommodate a wide range of product sizes, offering excellent flexibility for different market needs.
Entry Material: It can accept hot-rolled pickled coils with a maximum entry thickness of 4.0 mm, providing a good window for initial stock.
Finished Product: The mill is capable of producing thin-gauge finished products down to a minimum thickness of 0.25 mm, targeting applications that require precise, cold-rolled surfaces.
Width Capability: With a maximum rolling width of 1270 mm, the line can efficiently produce standard-sized sheets and strips, catering to a broad customer base.
4. Speed and Efficiency
Productivity is a key feature of this mill, designed for a high-speed rolling operation. It achieves a maximum rolling speed of 1,000 meters per minute. This high-speed capability, combined with the powerful drive system, ensures efficient throughput and high annual production capacity, making it a valuable asset for continuous operation.
5. Core Component Specifications
The mill is equipped with precisely engineered rolls, each playing a critical role in the rolling process:
Work Rolls: Specification: Ф355/390 x 1450 mm. These are the primary rolls in contact with the strip, delivering the necessary surface finish and reduction.
Intermediate Rolls: Specification: Ф405/455 x 1400 mm. In this 6-Hi configuration, the intermediate rolls provide additional support to the work rolls and aid in shape control.
Backup Rolls: Specification: Ф1150/1250 x 1350 mm. These large-diameter rolls provide the necessary backing force to minimize roll deflection, ensuring uniform strip thickness across the width.
6. Drive and Power System
The mill is powered by a robust and redundant drive system to ensure reliable, high-torque operation.
Main Drive: The main mill stand is driven by four main motors, configured as 1250kW x 2 x 2. This setup provides substantial and balanced power to the rolls for effective reduction.
Coiler Drive: The tension reels are equally powerful, featuring 1250kW x 2 x 2 motors for the coiler, ensuring precise tension control during high-speed coiling.
Uncoiler Drive: The uncoiler is powered by a dedicated 453kW motor, providing sufficient back-tension control for stable entry into the mill.
7. Control and Automation
Precision is guaranteed by the mill's key control features:
Gauge Control: The mill is equipped with an AGC (Automatic Gauge Control) hydraulic screw-down system. This is a critical feature for modern cold rolling, allowing for dynamic and highly accurate adjustments to the roll gap during rolling, ensuring consistent thickness tolerances along the entire length of the strip.
Electrical System: The entire electrical control system is supplied by Siemens, a world leader in industrial automation. The system is reported to be in good condition, which translates to high reliability, easier maintenance, and the availability of spare parts and technical expertise.
8. Coiling and Auxiliary Systems
Reel Type: Both the tension reel and the uncoiler are of the collapsible drum type. This design is essential for easy and efficient coil handling, allowing for smooth removal of the finished coil and secure gripping of the incoming material.
Reel Size: The reel diameter is Ф508/488 mm, a standard size that facilitates handling and compatibility with various coil handling equipment.
9. Value-Added Services from the Supplier
Keepwin Industry is not just a seller but a full-service solution provider. To ensure a seamless transition and quick ramp-up to production, they can offer a range of services:
Disassembly: Professional dismantling of the line for transport.
Refurbishment & Maintenance: Options to inspect, refurbish, and service key components before shipment.
Installation & Commissioning: On-site technical support to supervise installation and assist with the commissioning process to get the mill operational efficiently.
In summary, this 6-Hi 1450mm Cold Rolling Mill represents a complete, high-performance package, combining robust mechanics, proven automation, and the backing of an experienced industry supplier.
