Hot rolled coils have a layer of oxide on its surface. Push-pull type Pickling Lines ensures removal of surface oxides by chemical treatment using hydrochloric acid prior to cold rolling process. The type of acid depends on the material that is being processed.
For high production of strip ranging in thickness from 1.2 mm to 6.5 mm, continuous
lines are used. In these lines strip accumulators allow coils to be
loaded and unloaded while the strip continues to run through the pickling
section. The lines are normally operated by integrated mill operators and
are mainly used to pickle strip prior to cold rolling.
strip with thickness between 1.5 mm to 16.0
mm, Semi- Continuous and Push-Pull Pickling
lines are used. These lines are normally operated by integrated mills
and metal service centers.
Push-Pull lines process one coil at a time, thus removing the need for
joining strips. This allows tremendous flexibility of operation and ensures
ease of operation and maintenance. As there is no need for accumulators in
such lines, these lines are very much
cost-effective for medium volume of production between 200,000 to
As these lines do not incorporate accumulators, heavy-gauge strip of a high
tensile strength can be processed economically, and without work hardening.
Threading of Dassnagar Push-Pull
lines is made easier by our unique pickling-tank design. The shallow
tanks are made of granite and are ergonomically
contoured to permit easy threading.