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It Is an Internship report regarding Chemical Engineering.....Full Process description and plant mass flow has been described i this report with pictures and diagram.Prepared By:Tutmash Shafi AkhtarSP07-BEC-85Batch-4 Section-ADepartment Of Chemical Engineering.COMSATS Institute Of Information Technology, LahoreContact No : 0343-41 42 123Email : ilikechemicals@yaho.comBest Regards:
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Internship Report 2010
Internship Report 2010
Khair Pur Plant, Chakwal
Prepared by :Tutmash Shafi Akhtar
Reg No :
SP07-BEC-85 , Batch-4 , Section A
Department Of Chemical Engineering,
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010COMSATS Institute Of Information
Technology, Lahore
:: Table Of Contents :: Serial No.
Area Page No
1 Quarry and lime stone crusher 4
2 Storage yard (Operation of stacker, reclaimer & side scrapper)
6
3 Raw mill feed area, Raw mill, EP & conditioning tower 7
4 Labortories 9
5 Coal yard, Coal mill feed area, coal mill, storage of coal
10
6 CF Silo, low bin, preheaters cyclones and precalciner 11
7 Kiln and cooler 12
8 Cement mill feed area, gypsum crusher 14
9 Cement mills 14
10 Packing plant 15
Acknowledgement
My greatest thanks to Allah Almighty. Allah who bestowed me with the ability and potential to complete this Internship. Before I go into thick of the things, I would like to add a few deepest words for the people who were part Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010of this report in numerous ways… people who gave unending support right from the stage the report was assigned. Particularly I also wish to thank the
managerial staff at DG Cement who helped me to gain a lot of information regarding the company and cement industry and also who provide me an opportunity to learn and understand the working of organization as an internee. I am also thankful to Mr. Aleem (Trainee Engineer) and Mr.Umar Rehman (Trainee Engineer) who played a role of polar star for me in the organization and whose experience taught me a lot about the industry and the organization.And finally deepest and warmest appreciation to the whole team of DG Khan Cement Company
Executive Summary
Dera Ghazi Khan Cement Company Limited is a strategic business unit of Nishat Group, which is the largest industrial group in Pakistan. D.G. Khan Cement Co. is market leader with respect to market share with about 11.4% market share. Apart from its competitors; its product is high priced yet it has highest market share because of good quality. Its plant is situated in Dera Ghazi Khan and Khair Pur and head office is situated at Lahore. Factory site Unit 1and 2 that is situated in very remote area of Punjab, yet it proved a blessing for the company. Because it has all three basic raw materials i.e. Lime stone, Shale, and Gypsum at one place. It has three plants working two in D.G. khan and one in Khair Pur. First plant is old one and it is Japanese plant. The other two plants are of F.L.Smiths, Denmark. Presently it has a total Installed capacity of 14000 tpd(tons per day).Presently the company is also exporting the cement to Afghanistan, Iraq, UAE and Russia. The team of the D.G. Cement is story of success of D.G. Cement. The whole team is self-motivated and had played a vital role in the success of the company.
D.G. Khan Cement Company Ltd
Introduction
D.G. Khan Cement Company:
D.G. Khan Cement Company Limited (DGKCC), a unit of Nishat group, is the second largest
cement-manufacturing unit in Pakistan with a production capacity of 13,400 tons clinker per day. It
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010has a countrywide distribution network and its products are preferred on
projects of national repute both locally and internationally due to the unparallel and
consistent quality. It is list on all the Stock Exchanges of Pakistan.
DGKCC was established under the management control of State Cement Corporation of Pakistan
Limited (SCCP) in 1978. DGKCC started its commercial production in April 1986 with 2000 tons
per day (TPD) clinker based on dry process technology. Plant & Machinery was supplied by UBE
Industries of Japan.
Expansion -Khairpur Project
The Group has also set up a new cement production line of 6,700 TPD clinker near Kalar Kahar,
Distt, Chakwal, the single largest production line in the country. First of its kind in cement industry
of Pakistan, the new plant have two strings of pre-heater towers, the advantage of twin strings lies
in the operational flexibility whereby production may be adjusted according to market conditions.
The project equipped with two vertical cement grinding mills. The cement grinding mills are first
vertical Mills in Pakistan. The new plant is not only increasing the capacity but also providing
proximity to the untapped market of Northern Punjab and NWFP besides making it more
convenient to export to Afghanistan from northern borders.
Power Generation
For continuous and smooth operations of the plant uninterrupted power supply is very crucial. The
company has its own power generation plant along with WAPDA supply. The installed generation
capacity is 23.84 MW.
Environmental Management
DG Khan Cement Co. Ltd., production processes are environment friendly and comply with the
World Bank’s environmental standards. It has been certified for “Environment Management
System” ISO 14001 by Quality Assurance Services, Australia. The company was also certified for
ISO-9002 (Quality Management System) in 1998. By achieving this landmark, DG Khan Cement
became the first and only cement factory in Pakistan certified for both ISO 9002 & ISO 14001...
Quarry:
Quarry is the place from where raw material in extracted. Drilling and blasting is done to extract
the material.A hole of about 10-15 m is drilled and ammonium nitrate in filled as an explosive in
these holes. When this explosive is ignited the rocks are broken into pieces of different sizes. These
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010pieces sre then loaded on the dumper trucks and conveyod to the crusher. It is
located about 3-4 Km from the plant.
Quarry and raw materials:
The following raw material is required in the production process:
1. Lime stone: This raw material is company owned and is extracted from the
nearby quarry Unit. Limestone has the highest composition in the cement
product. 76% of the cement constitutes of limestone.
2. Clay: Clay is another natural resource. This raw material is also company
owned. 24% of cement composition comprises of clay
3. Iron Ore, Bauxites and silica sand: Iron Ore is the only resource that is bought from
contractors. Iron Ore, Bauxites and silica sand are added in small quantities less then one percent
and it helps to strengthen the cement.
4. Gypsum: Gypsum acts as a retarding agent. It slows down the hardening
process which in turn gives the constructor enough time to use it.
Proportions of different Raw Materials:
There are basically three main raw materials that are used for the production of cement.
In addition to that, a small proportion of other additives such as silica and Bauxites are also added.
1. Limestone 76%
2. Clay 24%
3. Iron ore (less than 1%)
4. Silica sand (less than 1%)
5. Bauxites (less than 1%)
Lime stone and clay are extracted from the same place. Iron ore is bought from a contractor.
Limestone Crusher: (EV 200*300) :
Capacity : 1500 tons/hr
Supplier : FLSmidth
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010Description:
Raw material such as limestone, clay, marl and shale are dumped into hoppers by dump trucks and
entered into a hammer crusher through an apron feeder. Inside hammer crusher there are hammers
each having a weight of 100-102 kg. They rotate at a speed of 1200-1300 rpm and is capable of
crushing feed of very large sizes.
Bag Filter :
The dust produced by crushing process can
cause damage to the equipment and may
produce dust, to overcome this problem a
bag filter is employed. A fan blows air and
all the dust goes to the bag filter. Inside the
bag filter a special type of canvas cloth is
used. When air passes through this filter
cloth, the dust particles stick to the cloth
and clean air passes through. The dust
particles are then collected and sent to the
conveyor. After sometime when the filter
is choked with particles, Purging system is
used in which high pressure air is used, this air removes all particles from the filter
cloth.
Composition analyzer ;
A composition analyzer is installed upon the feed conveyor belt. This analyzer
detects the composition of the feed before it goes to the storage pile. The radioactive
material used id “Clifornium”. Its half life is 2.5 years and its price is 84,00000. This
element emits rays which pass
through the feed and are deflected back to the analyzer, which then checks the
composition. The composition of eacs material is specific.
Magnetic separator :
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010A magnetic separator is installed on the feed belt. It attracts and removes
metal objects from the feed which are collected in the bin.
Storage Yard:
The crushed material is stored in the form of piles in the storage yard. There are 6
piles in the storage yard. Mixed piles are used in larger quantity where as high grade
and additive piles are used in small quantity.
2 Mixed piles (limestone & clay)
2 High grade (pure limestone)
Iron ore (additive)
Bauxite (additive)
Stacker :
A stacker is a device which form conical piles of the
crushed material. Feed is conveyod to the stacker through
conveyor belts. This stacker then moves too an fro to make
a pile. The stacker belt is called “Jib” in engineering terms.
Now, for conveying this material from piles to the
conveyor follweing equipment sre used :
Side scrapper
Reclaimer
Side scrapper :
Side scrapper is a device which picks the crushed feed from
the piles through its feed belt called “Hoist”. This belt has a
number of small buckets of low capacity. When this belt
moves, the buckets picks feed from the pile and put it on
the belt conveyor. Side scrapper in used for those piles
which are required in low quantity like bauxite and iron
ore.
Reclaimer :
Reclaimer is an equipment which is used to throw feed dowm from the pile. It has
two ams called “Harrows” These harrows are inserted into the pile, when they move
sideward, the feed drops down the pile. This feed in then collected by high capacity
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010buckets installed in the bottom of the reclaimer. These buckets pick the feed
and put it on the the belt conveyor. It is a large capacity equipment and for those
piles which are required in high quantity like Mixed Pile.
Raw mill Feed area :
The raw mill feed area consists of 4 feed hoppers:
Mixed feed hopper
Pure limestone hopper
Bauxite hopper
Iron ore hopper
The capacity of first two hoppers is 800 tons
while the other two hoppers have a capacity of
600 tons. The feed from each pile is conveyed to
the hoppers through conveyor belts in relevant hoppers. Each hopper has 4 load cells.
Load Cells : These are sensing devices which tells the load being put on the hopper
by the feed.
From these hoppers, the feed in required proportions is transferred by the belt
conveyor to the Raw Mill. A lot of dust is produced during the conveying of material,
to avoid this problem Bag Filters are installed. A Magentic separator is also intalled
to reomove metal impurities.
Raw Mill:
Capacity: 500 tons/hr
Motor power : 4300 kw
Supplier : FLSmidth
Sections Of Raw Mill:
There are 3 sections of a raw mill.
Table with 3 rollers
Bottom scrapper
Separator
Table:
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010The raw feed from the belt conveyor directly falls on the rotating table of the
raw mill. The table contains 3 crushing rollers. The raw fed is crushed to fine
powder with these rollers. The coarse particles are collected at the bottom of raw mill
and are sent to to the vibrator from where they are sent to to the raw feed belt
conveyor and again recycled to the ram mill for recrushing. The vibrator is use to
handle the quantity of the material being put on the belt.
Seperator :
At the top of the raw mill, there is separator section. Hot
gases from the kiln comes from the bottom of the raw mill
and lift very fine particles with it. A suction fan with motor
power of 4500 kw produces suction and sends dusty air into
the cyclones at the top. Here the dusty air rotates and
particles are separated from the air. These particles are
collected at the bottom of the cyclone and sent to the CF
silo with the help of air slides. The air which still contains
dust particles are separated in Conditioning tower and
Electrostatic precipitator.
Bottom separator:
Some fine particles from raw feed fall on the table, these particles are collected by
means of a bottom scrapper and sent to the CF silo.
Conditioning tower:
The air from the cyclones still contains the dust particles which must be separated
before the air is exhausted to the atmosphere. Air from the separator is passed
through conditioning tower. In conditioning tower, water is sprinkled through very
fine nozzles. The particles in the air get wet and settle down. These particles are then
conveyed to the CF silo via screw conveyor.
Electrostatic precipitator :
The clean air from the conditioning tower still contains some particles which have to
be removed. These particles are separated from air by passing it through the
Electrostatic precipitator.
In Electrostatic precipitator there are 2 corona wires which are mesh like. These wires
are negatively charged. There is a positively charged electrode in the centre which is
equidistant from
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010both corona wires. Dusty air passes through these corona wires and the
particles get negatively charged. The negatively charged particles in air are then
attracted by the positively charged electrode and the particles stick with it and clean
air is exhausted from the chimney.
Cleaning of the electrostatic precipitator:
In order to remove particles from the electrode . A “Wrapping” device is used. This
device hits the electrode as a hammer and particles fall down from it. These particles
are collected and conveyod to the CF silo via screw conveyor.
Labortories :
There are different laboratories for the determination of quality and strength of the
cement. Different types of tests are conducted to determine different properties of the
product. Also different types of fuels are tested for their inherent properties: for
example:
Fineness of coal
Humidity level of coal
Calorific value of coal
Composition of feed material and product
Settling time of cement
Residual material
Following are the different labs avalible.
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010
Sample prepration lab:
In sample prepration lab, different samples of cement are prepared and tested. Raw
material in put in an equipment called “Swing mill”. A swing mill is a grinding mill.
This grinding mill has a special type of vessel in which material is ground to very
fine powder.
Press mill :
The ground material is put into a circular dye and placed into a press mill. The mill
exerts pressure on it and a rigid dye is produced which a metallic circular outer layer.
The press mill exerts a pressure of 150 KN on the dye to produce a sample.
X-ray analysis :
Now, the sample dye is put into an x-ray analysis machine to determine its
composition. Thesample is place for 2 mins in the machine. The x-ray machine is
controlled by a computer software. This software restricts the machine to determine
upto a limit of 6 to 8 elements. After 2 mins , the percentage of each element in a
particular sample is shown on the computer screen. The x-ray machine is very fast in
producing accurate results.
Chemical testing lab :
Chemical testing of a cement sample is done to determined its composition. It was a
slow and time consuming process, but nowdays x-ray analysis is used due to its speed
and accuracy.
In chemical testing lab inspite of x-ray analysis, samples are also tested by manual
experimentation.
For this purpose a distillation unit with a capacity of 25 litrers is used to get distilled
water for experimentation. If normal tap water is used, it may be hard,it can alter the
sample composition and may produce errorful results. Two muffle furnaces at 1200
°C and 1600 C° are used to determine the residual matter, volatile matter and
moisture content.
Physical testing lab :
In physical testing lab, physical tests of different cement samples are done to check
its properties.
Following are the equipment available is physical testing lab:
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010 Weigh balance
Turbula mixer
Tensile strength machine
Water bath and curing tank
Compression testing machine
Motor mixer
Coal yard :
Coal yard is the area where coal is stored which is used for burning purposes. There
are different piles for the storage of local and imported coal. The coal is impoted
from South Arica, and Indonesia. The coal is handled by a loader, the loader picks up
the coal and throws on a sieved net which separates bigger pieces of coal and stones
form it, before it goes to the tunnel.
From the tunnels the coal is placed on the belt conveyor which takes it to the coal
mill feed area. Pet coke which is hard is also used in the coal feed.
Coal mill feed area :
After the impurities are removed from the coal, it is chuted on the belt conveyor .A
bag filter is employed which sucks the coal dust and thus prevents the coal from
being wasted. The coal is then shifted to the coal storage hopprs.
Coal storage hoppers :
There are 3 hoppers for the storage of coal. Two hoppers are for the storage of local
coal and the other is for the imported coal. All the three
hoppers have a capacity of 250 tons. The coal required
in different proportions are chuted on the belt conveyor
from the hoppers. A bag fiter is employed to remove
coal dust. A magnetic separator is employed to remove
metal impurities. This belt conveys the raw coal to the
raw coal mill.
Coal mill: ATOX 25
Specifications of coal mill :
Capacity : 52 ton/hr (coal mix)
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010 26 ton/hr (pet coke)
Supplier : FLSmidth
Motor : 600 KW
Sections of a coal mill :
There are 3 sections of a coal mill similar to the raw mill.
(1) Table (2) Rollers (3) Bottom scrappers
The coal on the belt conveyor falls on the table of the mill where rollers grind it to a
fine powder. A blower of very high power pushes very fine particles towards the two
fine storage bins. From the 1st storage bin the coal is sent to the kiln for its use in the
burner and from 2nd storage bin it is sent to to the precalciner for calcinations.
CF Silo (continuous flow) :
The fine particles from the conditioning tower
and electrostatic precipitator and the powdered
feed from the raw mill are conveyed to the
bucket elevator. The bucket elevator picks this
feed and take it to the top of the CF silo and
then throws it in.
Specifications of a CF silo :
Length = 54 m Dia = 22.4 m Capacity =
25,500 tons
Air circulations :
After the feed is stored in the silo bin. Now for the movement of feed in the bin, air is
blown from the bottom through different points in CF silo. These points are located at
the base of the CF silo.
Due to air circulations, fine particles are sent to air slides
from where they are transferred to Low bin (Loss of
weight bin). The capacity of low bin is 118 tons. The feed
from the low bin is sent to a bucket elevator which lifts it
to the preheator.
Pre-heaters:
The bucket elevator puts the material on the top of of 2nd
cyclone. The hot gases from the kiln flow with very high
velocity in countercurrent direction. The hot gasses lift
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010the particles from the particles from the top of 2nd cyclone and put it on the top
of the 1sr cyclone. From there the material falls on the top of the 3rd cyclone and
sends it into the 2nd cyclone. Then the material falls on the top of 4th cyclone and hot
gases take it into the 3rd cyclone.. then the material falls on the top of the 5th cyclone
and hot gases take it into the 4th cyclone and finally into the 5th cyclone preheater.
During this complete cycle, the hot gases foe in the countercurrent direction. Thses
cyclones serve the purpose of preheating the feed material with hot gases of kiln.
There are total 10 cyclone preheaters . 5 are on the right side of the precalciner and 5
on the left of the precalciner. The temperature of feed increases as the feed flows
downwards the preheaters.
Pre-calciner:
The feed from the 5th cyclone preheater falls into the
precalciner which has burner with a supply of coal and
furnace oil. Here the calcinations of feed material takes place
due to burning. Exchange of heat also takes place in the pre-
calciner. CO2 is evolved and exhausted in the atmosphere
and the feed is entered into the kiln riser at high temperature.
Some of the feed directly goes to the kiln without going to
the pre-calciner through separate pipes.
Kiln :
The preheated feed from the kin and the preheaters enter into
the kiln riser. From the kiln riser the feed enters into the kiln.
Specifications of the rotary kiln :
The rotary kiln has a length of 66 m and dia of 5.5 m.its inclination is 4 %.
Its rotating spped varies according to the quantity of feed entered. Around the inner
dia of the kiln there is refractory lining to prevent the shell from damage and to
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010control the environment temperature. Outside the kiln there are induced draft
fans which turn on automatically when the shell temperature increase more then a
certain limit.
Kiln Motors:
There are two kiln bases on which motors are installed which impart rotary motion to
the kiln.
Kiln burner :
On the other end of the kiln , there is huge
burner having a supply of coal, furnace oil
and air. The burner emits a flame which is
prolonged with high pressure air. The
flame burn the material and the product is
formed.
Zones of a rotary kiln :
There are different zones in the rotary kiln
namely :
(1) Alex (2) Victor (3) Magkor.
Alex : In this zone, feed from the precalciner and preheaters enter into the
kiln.
Victor : It is the main reaction zone where the conversion takes place by
burning.
Magkor : In this section clinker formation takes place of the burned material
Sections of a rotary kiln
The ash due to the burning of coal also goes with the product which causes LSF
(limestone factor) to reduce from the required limit. That’s why the material which
enters the kiln has a higher %age of limestone because it is balanced with the ash of
coal. The hot gases from the kiln are not wasted but used in different equipment in
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Alex Victor Magkor
Internship Report 2010the plant.
Kiln hood:
The hot material form the kiln falls into the kiln hood at the end which has an angular
sieve. When material passes through it it attains the shape of clinker. Now this clinker
is sent to the cooler.
Clinker cooler :
The clinker cooler is used to lower the clinker temperature. There are ID fans which
take fresh air from the atmosphere and send it to the cooler. At the bottom of the
cooler there are reciprocating rails which move with the help of hydraulic motors.
These rails convey the clinker forward to the clinker crusher.
Dust collection :
A suction fan is installed which sucks the product dust from the cooler and send it to
the electrostatic precipitator. In EP dust is removed and clean air is exhausted to the
atmosphere through a chimney. The dust particles are to the deep pan conveyor by a
screw conveyor.
Clinker crusher :
When the clinker cools and hardens then it is sent to the clinker crusher installed after
the cooler. Big stones of clinker are crushed to small pieces. The crushed clinker is
dropped on the deep pan conveyor at the bottom of the conveyor which conveys it to
the clinker storage.
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010Clinker storage :
The clinker from the deep pan conveyor is stored in the
clinker storage. Its capacity is 110,000 tons. Its length is
60 m and its width is 46 m. There are 3 gates at the
bottom of the clinker storage from where the clinker is
sent to cement mill through belt conveyor. Besides the
main clinker storage bin, there is a temporary clinker
storage hopper with a capacity of 1400 tons. If the
temporay hopper is also full then the clinker is removed
from the hopper and dumped into clinker storage yard.
Cement mill feed area :
There are 2 cement mills and 6 hoppers (3 for each mill) in the cement mill feed area.
The 1st hopper contains the clinker which is major constituent of the cement. The
cement contains 95 % clinker which is conveyed through weigh feeder to the main
belt conveyor which takes it to the cement mill.
Gypsum addition :
The crushed gypsum from a separate crusher is conveyed by belt conveyor to the
cement mill. It is mixed in the clinker while crushing. Gypsum is added to about 4 – 5
%. Its purpose is to increase the settling time of the cement.
Mixing of additive :
The additive which is pure limestone is also added in the cement mill. Its added to
about 2 %. Its function is to increase strength of cement.
A bag filter collects dust from the main belt and a magnetic separator remove
metallic impurities from entering into the cement mill.
Metal detector ;
To protect the cement mills from damage, a metal detector is installed which analyzes
the feed and if a metal object is found it opens the dividend gate automatically and
sends the feed containing metal objects to the rejected bin, which is again recycled to
the main belt and magnetic seperatoe removes it.
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010Cement Mills :
Cement mills specifications OK 36-4 :
Capacity : 175 ton/hr
Motor power : 3400 kw
Supplier : FLSmidth
The feed which is free from impurities falls on the
table of cement mill which contains three rollers.
Each roller has weight of 35 tons and the clearance
between table and rollers is 0.5 mm. These rollers
move hydraulically using nitrogen gas as hydraulic
fluid. The rollers crush the feed to a very fine powder.
The air slides conveys the ground product to the
bucket elevator which lifts it to enter into the 1st
storage silo.
Storage silos :
Specifications of storage silos :
Capacity : 21,000 tons
Length : 45 m
Dia : 22.4 m
There are 3 cement storage silos in which crushed
cement is stored uptill packing.. To convey the cement
to the other 2 silos air slides are used. From these silos
the cement enters air slides by air circulations through
blowers. Now these air slides take the cement to the
packing plant.
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010
Schematic view of silo. The old cement was blocking the air slides as well as bridging preventing the flow of cement from the silo. Sockets installed above discharge gates and lower air slides proved the ideal solution to blocking of silo and can be used whenever there is build-ups.
Packing Plant :
The packing plant comprises of 6 packers and 12
terminals. Each packer has a capacity of 100 tons/hr.
The cement bags are attached manually to the rotating
packer which fills the cement bag. When the bag is
filled upto the required weight , it automatically falls
on the conveyor balt which takes the bags to the roller
conveyor. From these rollers the bags slide to
different channels and finally cement bags are loadsed
on the trucks fro dispatch.
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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Internship Report 2010
Refrences :
www.sick.com/.../cement/Pages/cement.aspx
www.siamrefractory.com/cement_cyclone.php
www.freepatentsonline.com
www.freepatentsonline.com
www.lwbref.de/en/markets/cement-lime-industry/
Prepared By :
Tutmash Shafi Akhtar
Chemical Engineering,CIIT Lahore
Batch-4
Section-A
Tutmash Shafi Akhtar (SP07-BEC-85)Department Of Chemical Engineering, CIIT Lhr
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