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Used 750mm HRM

750mm
This is a 750mm fully continuous hot strip production line with an annual capacity of 1.5 million tons. Featuring a robust configuration of 5 roughing mills and 8 finishing mills, the line is fully integrated with advanced control systems like hydraulic AGC and AWC. It is dedicated to rolling carbon structural steel, quality carbon steel, and high-strength low-alloy steel, with product thickness ranging from 1.5mm to 12.7mm.
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1. Project Overview

  • Project Name: 750mm Fully Continuous Hot Strip Production Line

  • Designed Capacity: 1.5 million tons/year

2. Product & Raw Material

  • Steel Grades: Carbon Structural Steel (Q195, Q215, Q235), Quality Carbon Steel (20#), High-Strength Low-Alloy Steel (Q345B).

  • Product Specifications:

    • Thickness: 1.5 ~ 12.7 mm

    • Width: 420 ~ 600 mm

    • Coil Inner Diameter: Ø762 mm

    • Coil Max. Outer Diameter: Ø1990 mm

    • Max. Coil Weight: 11 tons

  • Raw Material: Continuous casting slab, 200mm (thk) × 420-600mm (wid) × 11000mm (len).

3. Core Line Configuration & Process

  • Line Composition: A fully continuous"5 Roughing + 8 Finishing"setup, complete from furnace to downcoiler.

  • Roughing Mill Area: Includes 4 vertical edgers (E1-E4) and 5 two-high roughing mills (R1-R5). Edgers feature AWC and SSC; roughing mills feature APC.

  • Finishing Mill Area: Includes 1 vertical edger (E5) and 8 four-high finishing mills (F1-F8). All finishing stands are equipped with hydraulic AGC. Hydraulic loopers are installed between stands for precise gauge and shape control.

  • Auxiliary Systems:

    • Descaling: Multiple high-pressure water descaling boxes (22 MPa) at furnace exit, E1/E2 exits, and before finishing mill ensure surface quality.

    • Cooling: Tubular laminar cooling system, ~65m long, max. water flow 4000 m³/h, for controlled coiling temperature.

    • Coiling: 2 fully hydraulic 3-wraparound arm downcoilers with AJC function for optimal coil shape.

4. Key Technology Highlights

  • High-Level Automation: Integrated APC, AGC, AWC, SSC, and AJC systems enable high-precision rolling.

  • Efficient Capacity Design: 7200 effective annual operating hours with a designed operational rate of 90%, indicating significant production potential.

  • Advanced Technology Application: Employs mature and reliable technologies like drum-type flying shear, hydraulic loopers, and overhead tank laminar cooling.

  • Complete Equipment: Includes comprehensive post-processing equipment like coil handling, bundling, painting, inspection line, and coil condition repair stations.