Wastage in down-stream rolling and coating processes is reduced significantly if the metal surface is completely free from surface impurities such as scale, oil and grease. The cleaner the material at the beginning of the cold rolling process is, the more reliable and cost-effective the production of the required finished quality. Fast, effective pickling is the prerequisite to achieve this goal. This, in turn, requires a stable process, exact strip tracking and accurate strip and pickling control.

 

Pickling Technology for strip includes Push-Pull- and Continuous Pickling lines, the latter either standalone or coupled to a tandem cold mill.

 

Push-pull Pickling Line 

Push-pull pickling lines offer significant advantages with respect to investment costs and operational flexibility, particularly for frequently changing strip dimensions and steel grades. The capacity of the line is up to 600,000 TPA.

 

Pay off Reel→ Nine roll Leveller → End Shear →Riveter →Entry Looper →Pre- rinsing Section Pickling Tank →Rinsing Tank →Hot Air Drier →Exit Looper →Deflector →Disc Shear(with scrap coiler)→Bridle Roll →Shear→ Oiler→ Coiler

Main Parameters 

Acid	Hydrochlorid acid
Strip Thickness	1.2-6.0mm
Strip Width	500-1700mm
Coil Weight	Max 30t
Line Speed	120m/min

 

Continuous Pickling Line 

Continuous Pickling is a production line that the steel strip is pulled continuously through the acid tank and rinsing tank. Continuous pickling lines feature modular design, high pickling efficiency, economical operation and the application of advanced technologies such as turbulence pickling. The capacity of continuous pickling line is up to 1 million TPA

 

Process Flow
Coil Prepare Station→ Coil Car→ Pay-off Reel→ Pinch Straightener→ Cutting Shear→ Welder→1# Bridle Roll→ Entry Accumulator →Front Tension Reel →Descaler→ Back Tension Reel→ Pickling→ Ice Water Clean→ Hot Water Clean→ Dryer→2#  Bridle Roll→  Exit Accumulator →Bridle Roll→ Control Roll→ Cutting Shear→ Disc Shear→ Feeder→4# Bridle Roll→ Oiler→ Pinch Roll→ Tension Roll→ Unloading Car

 

Main Parameters 

Acid	Hydrochlorid acid
Strip Thickness	1.2-6.0mm
Strip Width	500-1700mm
Coil Weight	Max 30t
Line Speed	200m/min