Ecomen Laboratories Pvt. Ltd. - Meghalaya State Pollution Control ...

CHAPTER-2
EIA/EMP OF Shree Shakambari Ferro Alloys Pvt. Ltd.
Blending of raw materials
Quartz, Charcoal, MS Scraps are mixed in the required quantity and lifted to
charging platform, with the help of lifting arrangements. The raw materials are
generally mixed in the following proportions in terms of weight: -
Quartz : 49.23%
Petrocoke : 36.92%
Mill scale : 13.85%
The blended raw materials are charged to the furnace with low voltage &
high current is passed through the Electrodes. All the process parameters are
being controlled through PLC system and closely monitored by the senior
metallurgists in all 3 shifts. As the process of ferro alloys is continuous, the
charge is fed at continuous intervals through hoppers and charging chutes into
the furnace hearth whenever the charge level comes down. Inside the furnace the
basic ore is subjected to oxidation at high temperatures between 1550 to 1750 0 C
and are reduced through the Petrocoke. The fluxes are used to maintain proper
basicity in order to maintain required temperatures and fluidization of slag. The
by-products gases are let out through the highly sophisticated pollution control
system and the fume dust is collected in to filter bags. The molten Ferro Alloys
and the slag is tapped at regular intervals and are casted as cakes in large Cast
iron casting pans. Every taping sample is drawn to determine the elements
present in alloy and also to take corrective actions by metallurgists if required.
After proper solidification of these cakes they are shifted to metal handling yard
for crushing, sizing, lot preparation, lot sampling, lot analysis, lot packing, lot
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