OCL INDIA LIMITED
OCL INDIA LIMITED, formerly “Orissa Cement Limited” and better known as
“OCL” was established in the year 1949 is a Public Limited Company having
its registered office and works at Rajgangpur, in the state of Orissa. Late Sri
Jaidayalji Dalmia, was the founder and plant started producing cement by
using wet process technology supplied by M/s F.L. Smith, Denmark and
successfully despatched the first consignment of cement on December 31,
1951, under the brand name of “Konark”.
Keeping a steady progress with time and technology, the plant was
modernized to fully automated dry process plant in 1988. OCL was the first
Indian cement company to installed Vertical Mill for grinding cement The
mill was supplied by M/s Loesche, Germany in 1997.The annual cement
installed capacity increased up to 6.70 million tonnes after commissioning of
its new Clinkerization unit no 2 at Rajgangpur,Odisha & Cement grinding
units at Kapilas Cement Works (KCW), near Cuttack (Odisha). & OCL Bengal
Cement Works (BCW) at Medinapur.
Product Portfolio
OCL is presently manufacturing the following under the
brand name of KONARK CEMENT.
1. Ordinary Portland Cement (OPC)- 43 Grade, 53
Grade , 53S Grade.
2. Portland Slag Cement(PSC)
3. Portland Pozzolona Cement(PPC) [
4. Masonry Cement [
5. Sulphate Resisting Portland Cement .
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MANUFACTURING OF KONARK CEMENT:Conventional mining using Drilling & blasting system is used for mining
alongwith the Primary rockbreaker.The mined out limestone is transported
to crusher by using dumpers. The limestone is crushed upto 75mm and is
stacked in the circular pile of 52000 MT capacity.The crushed limestone is
then transported to the factory at Rajgangpur Cement works by 13km long
CCBC (Cross country) Belt conveyor. The limestone from mines is either
directly fed to the Raw mill or stacked in the longitudinal pile in the plant
using the stacker. T
As per requirement,blended limestone is reclaimed with the help of reclaimer
& transported to VRM hopper. This limestone along with additives (morrum,
Fly ash, cinder etc.) as required is taken into the Vertical Roller Mill (VRM)
for grinding through weigh feeders at definite proportions. In VRM, the
mixture is ground to a fineness of about Residue-17% on 90 micron known
as raw meal and is fed and stored in the blending silo.
ESP and Reverse Air bag house is used for controlling the dust emissions t
while the Gas Conditioning tower is used for conditioning the hot gases to
improve the ESP efficiency and control the emissions.
CLINKERISATION UNIT(L-I):
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Make:- KHD
Type:- Rotary Kiln with inline calciner & 5 stage double string
preheater
Capacity:-3000 TPD
Dimension:- 3.8 m Dia x 56 m Length
Inclination:- 3.50
The raw mill from the silom is fed to the by using the kiln feed circuit which
has airslides and bucket elevator. 92% calcinations occurs in preheater
before it is fed to the kiln. Fuel is fired in the calciner and kiln.
The kiln is driven by electric drive & shell is supported by rollers. Also
thrust rollers arrangement is provided to compensate the floating of rotary
kiln during rotation.
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CLINKERISATION UNIT(L-II):
Line-2 Clinkerisation unit is commissioned in 2009 with modern & latest
technology which is highly energy efficient & environmental friendly.
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Make:- KHD
Type:- Rotary Kiln with inline Calciner.
Capacity:-4000 TPD
Dimension:- 4.2 m Dia x 64 m Length
GRATE COOLER (Both line):Clinker produced in the rotary kiln(both line) is cooled in the Grate
Cooler upto 110 deg centigrade The Humboldt Wedag Grate Cooler is a
reciprocating grate cooler with a continuous grate.
Clinker cooled in Grate cooler is stored in Closed circuit in Line-1 & also
in Line-2 it is stored in Clinker Silo.
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CEMENT GRINDING SECTION
After Clinkerisation, clinker fed to the CVRM (3 Vertical mills) & cement
mills (4 ball mills) alongwith Gypsum & other materials like slag etc. This is
the single largest Cement grinding units of 7 Mills (3 VRM+4 BALLMILL) in
single location. The first Loesche clinker/slag mill in India, an LM 46.2+2,
was commissioned at Rajgangpur plant in 1997.
In CVRM, Slag and Clinker with Gypsum are ground separately and stored
in separate compartments silos from where OPC or PSC & PPC (by inter
mixing by means of a paddle mixer) is obtained.
Main Equipment:1) Cement Ball Mills (4 Nos)
2) Cement Vertical Roller Mills (CVRM)-3 Nos.
BAG-HOUSE/BAG FILTER:
The ground material from all Grinding Mills is passed through Bag filter &
filled to compartment silos. Latest Pulse jet bag filters are installed in all
Grinding Mills. The dust laden gas enters the bags from the Mill& the
cleaned gas vent to the stack.
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Cement and Clinker despatch
It is the final process of our cement factory where finished product i.e.
cements is packed in bags, subsequently despatched through wagons or
trucks. There are 17 Nos. of cement silos in which cement is stored and
thereafter it is conveyed to the packing machine hoppers through air slide
and elevators via vibrating screen for packing purpose. There are 6 Nos. of
Rotopacker M/C in our packing house. The packed bags are conveyed to the
points of loading by means of belt conveyor arranged in respective routes
from where they are loaded to the wagons or trucks by wagon loaders or
truck loaders respectively.
Clinker is also loaded in to the railway wagons and despatched to our
grinding units at Kapilash and Medinipur.
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