NATIONAL ALUMINIUM COMPANY LIMITED - Rites

automatic controls for positioning, tipping and discharging the entire ccontents
ontents of the wagons
into the hopper.
5.1 Wagon Unloading System
5.1.1 The rake comprising of specified maximum maximum60number number of wagons shall be pushed into the
reach of in-haul haul equipment by a locomotive. Further placing of wagons over tippler
platforms and carrying aw away ay the empty wagons shall be accomplished with the help of a side
arm charger under scope of bidder.
5.1.2 Wagon unloading equipment shall be suitable to handle any type of wagons being used by
Indian Railways for transportation of coal. Thus side arm charger aand
nd wagon tippler shall be
suitable to handle all standard broad gauge (1676 mm) wagons of RDSO design used by
Indian Railways conforming to latest revision of IS: 10095.
5.1.3 Maximum moving dimensions of locomotive & wagon as per Indian Railway norms shall be
adopted for providing clearances with respect to structures, equipment and tippler
arrangement.
5.1.4 Complete wagon tippler and accessories shall have the approval of concerned Indian Railway
Authorities and RDSO. Further, the contractor shall submit to the Owner detailed drawings
of wagon tippler and accessories including civil and structural drawing only after getting the
same approved from the concerned Railway authorities.
5.1.5 The bidder shall obtain all statutory approvals from the relevant Railway authorit authorities, before
the wagon tippler complex is put into operation. Any statutory payment charges, to be made
to the concerned authorities shall be to Bidder’s account. It is the responsibility of the
Contractor to carry out any modifications as required by the RRailway
ailway authorities, at no extra
cost to the Owner.
5.2 Wagon Tippler Hopper
5.2.1 The wagon tippler hopper shall be of RCC construction and adequately sized to
accommodate the coal load for atleast two (2) nos. 8 wheeled wagons of RDSO design used
by Indian ian Railways. For effective volumetric capacity computation of the hopper, the angle
of repose of coal shall be considered as 37°. The minimum valley angle of the hopper shall
be considered as 60°. The hopper shall have opening below which apron feeders sh shall be
provided to evacuate coal from the hopper and feed onto associated belt conveyors below.
Complete inside surfaces of the hopper shall be provided with 50 mm thick guniting. Further
it shall be possible to empty out all the coal, without any dead sto stock ck from the hopper.
5.2.2 Steel gratings of mesh size 30 300 mm x 300 mm over wagon tippler hopper shall be provided.
The gratings shall be built of minimum 200 mm x 36 mm thick flats. The hopper and gratings
shall be designed for movement of ffront
end loader/bulldozer over them. Bull Bull-dozer weight
shall be considered as about 35 T.
Technical Specification:Sec-4,System System Parameters, Operation & Control Philosophy
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