Acid Pickling Line

SteelStrip Acid Pickling Line

Acid picking line is one of the important procedures in cold rolling steelstrip production technology, the aims of acid pickling are to remove the ferricoxide existing in steel strip surface, adjust weight of each coil, shear off chappededge to obtain qualified raw material for the next coming cold rolling process.According to different technique, acid pickling can be sorted into push-pulland continuous modes.

Push-Pull Shallow Trough Turbulence AcidPickling Line

The push-pull pickling line is to undertake each steel coil picklingseparately without welding, start up with push the steel strips and then pull.Usually this kind of pickling technology is suitable for those lines with annualcapacity lower than 600,000 ton, however our company adopts advanced shallow troughturbulence push-pull technology and the annual capacity could be up to1,000,000 ton. With the advantages of smaller location, less investment, moresimple equipment, more convenient operation, easier maintenance and well-adaptedfor various type of steel strip, our acid pickling line is well suitable forsmall and middle-sized cold rolling plants.

Technical Parameters:

Production capacity: 200,000- 600,000tons annually (depend on the needs of customer, Max. annual capacity is1,000,000 tons at present)

Raw material: hot rolling carbonstructure steel, high quality carbon structure steel and low alloy steel coil,silicon steel;

Thickness of steel strip: 1.5-5.5mm

Width of steel strip: 700-1,350mm (whenless than 600mm, semi-continuous method will be adopted);

Processing speed: 30-180m/min (dependon the needs of output)

Coil weight: Max. 25tons

Technology: push-pull shallow troughturbulence acid pickling

Energy: water, electricity, steam

Process Flow

Main equipments according to processflow in turn are as follows:

Manually loading → entry skid→ coil loading trolley → pre-decoiling (floor roller) → decoiling scraper →3-roller pinch straightener → anti-bend roller → pay off reel → decoiling pinchroll → vertical guide roller → 5-roller pinch straightener → transverse shearer→ vertical guide roller → acid pickling trough → washing trough → edge blowingdevice → hot air dryer → accumulator pinch roll → pit type accumulator →vertical guide roller → pinch centering machine → circle shearer → waste edgerecoiler → 3-roller tension bridle roll → transverse shearer → vertical guideroller → exit pinch roll → recoiler (EPC) → coil unloading trolley → rear partpressure roller → exit skid → manually unloading

Manually loading → entry skid →coil loading trolley →pre-decoiling (floor roller) →decoiling scraper →3-roller pinch straightener →welder→corner shearer-transverse shearer→anti-bend roller →pay off reel →decoiling pinch roll →welder →vertical guide roller →5-roller pinch straightener →transverse shearer →vertical guide roller → acid pickling trough →washing trough →edge blowing device →hot air dryer →accumulator pinch roll →pit type accumulator →vertical guide roller →pinch centering machine →circle shearer →waste edge recoiler → 3-roller tension bridle roll →transverse shearer →vertical guide roller →exit pinch roll →recoiler (EPC) →coil unloading trolley →rear part pressure roller →exit skid →manually unloading.

Continuous Acid Pickling Line

For continuous acid pickling line, the headand rear parts of two different coils shall be welded together, both entry andexit of process sections are equipped with accumulators to guarantee acontinuous operation. Generally when the annual capacity exceeds 700,000 tons,continuous picking line will be adopted.

Process Flow

Main equipments according to processflow in turn are as follows:

Manually loading → entry skid→ coil loading trolley I# &II# → pay off reel I#&II# → decoiling scraper I# &II# →5-roller pinch straightener I# &II# → transverse shearer I#&II# → vertical guide roller → welder → crescentshearer → pinch roll → entry accumulator → scale breaker → tension bridle roll →vertical guide roller → acid pickling trough → washing trough → edge blowingdevice → vertical guide roller → hot air dryer → tension bridle roll → exit accumulator→ tension bridle roll → transverse shearer → exit pinch roll → recoiler (EPC) →coil unloading trolley → exit skid → manually unloading

Manually loading →entry skid →coil loading trolley I# &II# →pay off reel I# &II# →decoiling scraper I# &II# →5-roller pinch straightener I# &II# →transverse shearer I# &II# →vertical guide roller →welder → crescent shearer →pinch roll →entry accumulator →scale breaker →tension bridle roll →vertical guide roller →acid pickling trough →washing trough →edge blowing device →vertical guide roller →hot air dryer →tension bridle roll →exit accumulator →tension bridle roll →transverse shearer →exit pinch roll →recoiler (EPC) →coil unloading trolley → exit skid →manually unloading.

Technical Parameters:

Annual production capacity: 700,000-2,000,000 tons (depends on the needs of customer)

Raw material: hot rolling carbonstructure steel, high quality carbon structure steel and low alloy steel coil,silicon steel;

Thickness of steel strip: 1.5-6mm

Width of steel strip: 700-1,350mm

Processing speed: 100-240m/min (dependon the needs of output)

Coil weight: Max. 25tons

Technology: continuous shallow troughturbulence acid pickling

Energy: water, electricity, steam