NATIONAL ALUMINIUM COMPANY LIMITED - Rites

1.0 GENERAL
M/S. National Aluminium Company Ltd. (NALCO), Angul have undergone 2
expansion of their Captive Power Plant (CPP).The 9th & 10th units are added in 2nd phase
expansion of the Existing Captive Power Plant (CPP) by increasing the station capacity to
1200MW. Facility for Storage and Handling of about 90,000 t additional
been envisaged to be added in 2nd phase expansion of Captive Power Plant. The new
uncrushed coal storage yard shall be equipped with stacker and reclaimer machines and
shall have uncrushed coal supply connectivity to old and new coal bu
nd phase
expansion of their Captive Power Plant (CPP).The 9th & 10th units are added in 2nd phase
expansion of the Existing Captive Power Plant (CPP) by increasing the station capacity to
1200MW. Facility for Storage and Handling of about 90,000 t additional uncrushed Coal has
been envisaged to be added in 2nd phase expansion of Captive Power Plant. The new
uncrushed coal storage yard shall be equipped with stacker and reclaimer machines and
shall have uncrushed coal supply connectivity to old and new coal bunkers through
respective Crusherhouse. house.
2.0 Basic Data
Material to be handled - Uncrushed coal (Grade E / F / G)
Feed size
- (-) 300 mm
Specific gravity of coal - 0.8 t/m3 for volume calculation
1.1 t/m3 for strength calculation
Moisture (%)
- 6% to 10%
No of working days / yr - 330
No of working shift / day - 3 shift of 8 hrs per day
3.0 DESCRIPTION OF EXISTING SYSTEM
The salient features of existing coal handling facilities consist of following:
3.1 ROM Coal of (-) 300mm mm size is brought from coalfields in Bottom Discharge Captive Railway
Wagons.
3.2 Coal from coalfield is received through a Merry Go Go-round round (MGR) system between the CHP
and coalfield.
3.3 There are two (2) nos. of existing Track Hopper Buildings with undergrou underground RCC hopper.
3.4 Each TrackHopperBuilding has four (4) nos. of paddle feeders of travelling type at its bottom
to scoop coal from the track hopper. Two paddle feeders are mounted on individual
conveyor.
3.5 There are two (2) underground conveyors at bottom of each track hopper. Both conveyors
are running parallel at the bottom of the track hopper hopper–1. 1. The parallel conveyor installed at
the bottom of track hopper hopper–2 run in opposite direction.
3.6 There are two (2) Bunker Bays. The old BunkerBay meets the crushed coal requirement for
Unit 1 – 6 whereas the new BunkerBay meets the crushed coal requirement for unit 7 to 10.
Thus, there are two separate conveyor paths. Each path has two conveyor streams running
in parallel.
Technical Specification:Sec-1 General
SECTION 1
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