Some of the measures, which have been implemented for effective control of water pollution are:
- Coke oven quenching- The waste water generated during
quenching is taken to settling tanks. After settling, the water is reused for quenching the hot
coke.
- Sinter plant- Use of blow-down water is used in sinter nodulising.
- Blast furnace- Dust laden waste water is treated in effluent
treatment plants and the treated water is recycled back to the process to scrub blast furnace gas.
- Steel melting shop (SMS)- The waste water is taken to a
settling tank and the outlet water of the tank is reused. The blow-down water is used in slag
granulation.
- Rolling mill- Process waste water is skimmed for oil and scale
and then recycled back to the plant. No wastewater is discharged.
- Direct reduced iron (DRI)- Cooling close-circuit
effluent-recycling system has been installed. Waste water from the cooling section is taken to a hot
water well and then to the cooling tower and the cold water well, from where it is recycled back
into the process.
- Power plant- DM plant wastewater is treated in the
neutralization pit. After treatment, the water is reused for wet ash handling system.
- Submerged arc furnace (SAF)- Waste water is reused for slag
cooling and dust suppression.
- Sewage treatment plants (STP)- Sewage treatment plants have
been installed across all the units. The treated water is 100% reused for horticulture and green
cover.
- Garage, DG set and compressor houses- Oil separators have been
provided. Clean water is further treated in the STP.
Rainwater harvesting
Rainwater harvesting structures have been constructed for ground water recharge in consultation with
the water resource department across all units. Also, the surplus rainwater collected in the open pits
is used as make up water during operations of the plant.
