Project Name: 850mm Continuous Pickling Production Line 2#
Customer name: Zhejiang Yuanli Group
Project nature: new construction
Undertaking method: Jingjie Ruisi general contracting
Signing time: September 26, 2010
Production: Under construction
Progress: In good condition
1. Basic parameters of the unit
Raw materials: cold-rolled carbon structural steel, high-quality carbon structural steel and low-alloy steel coils
Steel grades: Q195, Q235, ST12, ST13, SPCC, SPCD and 20#.
Tropical temperature: ≤55 degrees
Yield strength: 210~360N/mm2
Tensile strength: 270~610N/mm2
Strip thickness: 1.5~1.8~3.0mm
Strip width: 580~630mm
Raw material inner diameter: Φ508mm
Product Inner Diameter: Φ508mm
Outer diameter of steel coil: max Φ1600mm
min Φ1100mm
Unit weight of steel coil: max 5.6 t
Annual work plan: 300 days * 24 hours
Energy: water, electricity, steam
Product Form: Roll to Roll
Production program: 300,000 tons/year
Unit ****** process speed: 70m/min
2. Technical indicators of the main body of the production line
Process method: Continuous shallow tank turbulent flow hydrochloric acid pickling
Production line layout: from left to right from the operation side
Production line ****** process speed: 70m/min
Process speed when changing the reel: 50-60m/min
Jogging speed: 10-30m/min
Unit transmission mode: AC transmission, frequency conversion speed regulation
Acid concentration: Max 200 g/L HCl, 125 g/L Fe2, 5 g/L Fe3
Acid Fluoride Content: ≤4ppm
Minimum pickling time: 26s
Total length of the acid tank: approx. 50 m
Total length of the unit: approx. 116 m
Uncoiling tension: 10 kN
Winding tension: 25 kN
3. Process flow and equipment
1. Technological flow
The main equipment is composed of the following according to the process:
The main equipment is composed of trolley feeding (1, 2), uncoiling unit (1, 2), uncoiling scraper (1, 2), five-roller leveling machine (1, 2), shearing machine (1, 2), welding platform, scale breaking machine, 1# tensioning machine, 1# automatic centering machine, 1# front loop (2#, 3# single roll automatic centering machine), 4# double roller centering machine, 2# front loop (5#, 6# single roll automatic centering machine), 7# automatic centering machine, 2# tensioning machine, 1# vertical guide roller, pickling 1, pickling 2, Pickling 3, pickling 4, rinsing 1, rinsing 2, rinsing 3, rinsing 4, 2# vertical guide roller, edging machine, hot air dryer, 3# tensioning machine, 8# automatic centering machine, 1# rear loop (9#, 10# single roll automatic centering machine), 11# double roller centering machine (12#, 13# single roller automatic centering machine), 14# automatic centering machine, 4# tensioning machine, shearing machine, 1#, 2# outlet steering pinch feeder, 1#, 2# winding unit (with EPC), 1#, 2# outlet discharge trolley.