12 Hi 1400 mm Cold Rolling Mill

I. Equipment Overview (Detailed)

This equipment is a second-hand 12-Hi 1400mm cold rolling mill , originally manufactured by Wuxi Qiaolian Metallurgical Equipment Co., Ltd. in 2009. The mill is designed for processing hot-rolled steel coils into high-precision cold-rolled strips with excellent surface quality and thickness tolerance. It adopts a 12-roller configuration, which provides superior rigidity and allows rolling of harder materials with minimal deflection. The mill is equipped with an AGC (Automatic Gauge Control) hydraulic screw-down system for real-time thickness control and a Siemens electric control system for stable, automated operation. Although the mill has been taken out of production, it remains in mechanically intact and electrically functional condition. The equipment is suitable for rolling stainless steel, carbon steel, silicon steel, and low-alloy steel strips. Optional value-added services include on-site disassembly, full refurbishment and maintenance, transportation coordination, and re-installation and commissioning support, making it a flexible, cost-effective solution for secondary mill buyers worldwide.

II. Detailed Technical Data Table

III. Structural Features (Based on Confirmed Data)

The 12-Hi mill configuration, as specified in the technical data sheet, offers several advantages:

• Work roll diameter ranges from Φ100 mm to Φ120 mm, with a barrel length of 1400 mm, allowing high specific pressure for efficient thickness reduction per pass.

• Intermediate rolls range from Φ215 mm to Φ225 mm in diameter, with an adjustable length between 1200 mm and 1400 mm, providing flexibility for strip shape control.

• The mill is designed for a maximum rolling force of 8000 KN, indicating a robust roll stack structure capable of handling hard materials and significant reductions.

• Collapsible coiling drum allows easy removal of finished coils without damaging the inner wrap.

• AGC hydraulic screw-down system responds quickly to thickness variations, ensuring uniform gauge across the entire strip length.

IV. Electric Control System Details

The mill is equipped with a Siemens-brand electric control system, as confirmed in the original document. The system is reported to be in good condition with no missing components (to be reconfirmed). Typical components of such a system include:

• Main drive control cabinets

• AGC hydraulic servo control unit

• Operator interface panels

• Emergency stop and safety interlock system

• Coiler/uncoiler tension control module

Buyers are encouraged to conduct on-site verification of the electrical system before finalizing the purchase.

V. Equipment Condition Assessment

• Mechanical condition: The main frame, roll chocks, gearboxes, work rolls, intermediate rolls, and coiler/uncoiler drums are reported to be intact. Detailed inspection is recommended.

• Hydraulic system: AGC hydraulic system is in place; full functionality to be confirmed during recommissioning.

• Electrical system: Siemens cabinets are complete according to available information; no major missing components reported.

• Wear parts: Work rolls (Φ100–Φ120 mm) and intermediate rolls (Φ215–Φ225 mm) show normal wear from prior use.

• Overall rating: Suitable for refurbishment and reinstallation; estimated remaining service life of 8–12 years with proper maintenance.

VI. Applicable Materials & Typical Products

Based on its design parameters, this 12-Hi cold rolling mill is capable of processing the following materials:

• Stainless steel

• Carbon steel

• Silicon steel (electrical steel)

• Low-alloy steel strips

Typical end products include:

• Household appliance panels (refrigerators, washing machines)

• Automotive interior and structural parts

• Light industrial components

• Precision stamped parts

• Thin-wall welded tube raw strips

VII. Optional Value-Added Services