Technical data

CHAP-03 BRIEF SYSTEM DESCRIPTION Page 2 of 20

capacity from the storage yard to the top of the storage cum blending

bunkers is 800 tph.

v) Coal is withdrawn from 14 nos silos in two rows- 7 nos in each row

according to predetermined blend ratio in two streams and fed to the

final crushing station No.2.

vi) Four reversible hammer crushers of 300T/h have been provided for final

crushing in crushing station No.2.

vii) From final crushing station No.2, crushed coal blend is dispatched to

junction No. 3F and finally to coal towers No. 5 and 6 and coal tower no

4 in case of constraint in coal supply of CHP.

viii) Also new conveyors Y9-99A and Y9-99B have been commissioned in

the year 2002 to have the provision for taking coal from CPP-2 coal yard

to conveyor Y9-80 and Y9-81, so that coal can be fed to silos of

batteries 1 to 8.

ix) Blending is done through 14 nos of Belt weigh feeders/ Automatic

Proportioning Device (APDs).

03.02 DESCRIPTION OF PROPOSED COAL HANDLING PLANT FOR

COAL TOWER NO.- 7 OF COB#11 COMPLEX

1. General

In order to meet the enhanced required of coal for coke making,

following additions, augmentation & modification to the existing coal

handling plant is proposed:

 Addition of 5 nos. of RCC mixing bins (Silos), each of 500t storage in 3

row of silos parallel to existing two rows of silos.

 Installation of 2 nos. additional reversible hammer mills (designated as

hammer mill 7&8), each of capacity 300t/h in existing row of hammer

mills after extending the existing final crushing station suitably.

 Replacement of existing hammer mills no. 5 & 6 by new hammer mills of

300 t/h capacity each, along with 630 KW slip ring reversible electric

motors. Room for resistance banks & control panels for hammer mill no.

5, 6, 7 & 8 shall be provided in the new portion of the final crushing

station.

 Upgrading & modification of existing collecting conveyors Y7-12 & Y7-13

to 1000 t/hr. rated capacity in the existing location with minimum

shutdown.

 Connecting conveyor stream, connecting new coal tower no.-7 with

existing coal handling plant.