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Coil to Coil Annealing Line
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Overview
Silicon
steel (CRGO) coils are hard and brittle
with elongated grain structure. For desired grain refinement, mechanical
properties and bright surface finish, they are processed in a protective
atmosphere in direct oil fired Continuous Annealing (Normalising)
furnaces.
Classification
They are categorized into two types :
- Bell Annealing Furnace
- Coil to Coil Annealing Line
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Offerings
Dassnagar make Annealing lines are of the coil to coil variety
encompassing sophisticated equipment in the form of dual
pay off reels, straightener, stitcher,
direct
oil fired annealing furnace with recuperator,
looper car, re-circulating
spray quench system, sludge
separator, drier, shot
blasting unit, rewind reel, coil
car for transportation of coils and coil
storage.
The annealing furnace section encompasses sophisticated automation designed
in collaboration with Pittsburgh based Allegheny Ludlum corporation.
Annealing process details are available in the collaborators website.
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Salient Features
- wide processing range 1.8 mm to 2.5
mm,
- achieved productivity > 36,000 tpa, line speed
20 mpm,
- roll design and roll crown system - specially calculated for
each furnace for ultimate control and durability.
- entry and exit bridle roll units maintain proper strip tension
inside furnace section - no sag at all,
- swivel type steering roll unit for
strip guiding - horizontal looper car
for strip accumulation to prevent strip burning inside furnace,
- shot blasting unit for removal of
oxide scales,
- strip lead & tail end joining - double
row strip stitcher,
- direct heat recovery from the strip, reduced risk of oxidation,
thermal shock, - improved furnace transient performance,
- squeezer roll assembly after rinsing section squeezes water from
strip surfaces,
- re-circulating spray quench system with sludge separator,
- dual uncoiler (pay of reel) ensures non-stop line RUN during
coil change,
- auto tail out function ensures that the coil is processed till
the last end,
- precise strip tension measurement and control sag thru PLC,
- in house manufacturing of all equipment
to maintain quality,
- servicing within 48 hrs in any corner of the world,
- readily shippable spare parts
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