Carbon steel push-pull pickling unit (PPPL)

The push-pull hydrochloric acid shallow groove turbulent pickling process is used to remove the iron oxide layer on the surface of the hot-rolled steel strip and cut off the irregular edges of the steel strip to provide qualified hot-rolled plate raw materials for the next process. The steel strip after pickling has a pure iron surface and can be cold rolled or hot-dipped galvanized.

Unit characteristics

Using single unwinding non-continuous type; using hydrochloric acid multi-stage shallow groove turbulent pickling process and multi-stage water rinsing process

Annual production scale: 200,000-600,000t/a

Raw material: Carbon steel hot rolled coil

Steel grade: CQ, DQ, DDQ, IF, HSLA, W440-W1300 silicon steel

Raw material specifications: 1.5-6.0mmx width: 650-1650mm

Roll diameter: I.D.Φ760/Φ610mmO.D.MaxΦ2150mm Maximum roll weight: 30t

Hot rolled coiling temperature: Max670 degrees (IF<720 degrees)

Threading speed: 30-60mpm

Process speed: Max150mpm

Pickling time: 25-30sec

adopt SIEMENS or ABB electrical control system

Production process

Coiling→uncoiling→straightening→head cutting→corner cutting→HCL pickling-water cleaning-drying→trimming→inspection→tail trimming→oiling→coiling→unwinding