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For coils to be pickled:
Cold-rolled carbon structural steel, high-quality carbon structural steel and low alloy steel coils.
Steel type: Q195/235, ST12/13, SPCC, SPCD and 20#
Yield strength: 210~360N/mm 2
Tensile strength: 270~610N/mm 2
Specifications
Coil thickness:1.2~4.5mm
Coil width: 650~1650mm
Inner diameter of coils to be pickled: ф610mm
Inner diameter of coils after pickling: ф610mm
Coil outer diameter: max.ф 2100mm
Finished product width:1650mm
Coil weight: max 30t
Annual work plan: 300 days×24 hours
Energy: water, electricity and vapor
Product form: coils one after another
Production capacity: 360000Ton/year
Max. Process speed: 120m/min,
Max 200 g/L HCl, 125g/L Fe 2+ ,5 g/L Fe 3+
II. The major technical targets
Process method: Push-pull shallow trough turbulence hydrochloric acid pickling
APU layout direction: From left to right when seating at operation out board
Max. process speed: 120m/min
Threading speed: 10~60m/min
Point move speed: 10~30m/min
Transmission way: AV driving system, speed regulated by variation
frequency
Acid concentration: Max 200 g/L HCL, 125g/L Fe 2+ ,5 g/L Fe 3+
Min. acid pickling time: 26s
Acid trough length in total: about 50m
Whole ACU length: about 120m
III. Process Process Flow
Major equipments in turns are as follows:
Crane hoisting coils to skids →coil laoding car→ decoiler (pressure roller,
anti-curve roller) → decoiling scraper → Deflector roll → vertical
guide roller → pinch roller straightener → crop shearer →corner
shearer(with scrap bucket) → vertical guide roller → pre-washing
trough → four-grade hydrochloric acid pickling trough → four-grade
washing trough (Including pre-washing section) → edge blowing device
→ hot air dryer → II# pinch roller → looper (Both ends are equipped
with looper swing stand) → vertical guide roller → pinch centering
machine → circle shearer (With waste edge recoiler) → 3-roller
tension roller → crosscut shearer → vertical guide roller → steering
pinch roller → recoiler → coil unloading trolley → coil receiving stand
→Crane hoisting coils to storage house
IV Energy
Electricity: installed capacity: about 1500kw, 380v
Including:
Major transmission (AC frequency conversion motor) installed capacity: 900kw
Auxiliary equipments (Constant AC motor) installed capacity: 600kw
The two parties' electricity connection is separated by Party B control
cabinet inlet line switch upper port; Party B's switch is protected and will
provide relevant installed capacity. Cables and span structure except the
controlling cabinet shall be provided by Party A.
Note: Workshop public facilities electricity energy is not included.
Compressed air: 0.4~0.6Mpa, purified air: 4 Nm 3 per min
Water: Rinsing water is soft water. Consumption on average is about 5 m 3
per hour
Vapor: Providing capacity is 6.5t/h(p=0.5Mpa 151ºC saturated vapor),
actual consumption on average is about 6t/h
Waste air discharge amount: about 16000 m 3 per hour
Pollution control: Waste liquid: rinsing water: 5 m 3 per hour, including
HCL less than 10g/L
Waste air: HCL content is less than 20mg/ m 3
The whole APU length:113m
Plant width: 33m











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