| G Steel’s plant is currently the most advanced
among similar plants worldwide. The plant’s layout,
generally termed as “Compact” or “Mini” mill, comprises
3 basic production process of steel making, continuous
slab casting and hot rolling, integrated into a
close-coupled production line.
1.Steel making
The first step of the process is to melt a variety
of scraps and other bearing materials like pig
iron with additives to produce clean steel. This
process is carried out in two sturdy and robust,
fast working Electric Arc Furnaces (EAF) supplied
by Mannesmann Demag Huttentechnik, Germany and
equipped with oxygen fuel burners, carbon injection
system, etc. The steel is further refined and
its chemistry fine-tuned to customers requirement
at two Ladle Heating Furnaces (LHF).
2. Continuous Casting
In the second step, the clean, refined and graded
steel in liquid form is then fed to medium thickness
continuous slab caster. The slab casting technology
is supplied by Sumitomo Heavy Industries, Japan.
This latest technology combines the advantages
of conventional slab process in terms of quality
and production cost advantage of thin slab casters.
The caster has the state of the art features like
liquid core reduction, start-stop sequence, mould
level control, and breakout prediction module
which allows G Steel to simplify the range of
operator tasks of this complex process.
3. Hot Rolling Mill
In the last step of production process, the slab
from caster is fed through a tunnel furnace which
maintains the slabs at required rolling temperature,
to a continuous rolling mill. The mill is supplied
by world leader Mitsubishi Heavy Industries and
consists of two roughing stands, mandrels, coilbox
and six finishing stand. The coilbox installed
between roughing and finishing mill optimized
the space requirement and improves the transfer
temperature thereby reducing the power requirements.
Other features include crown and shape control
technologies, latest gauges as well as on roll
grinding.
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