2. Company
Overview
•Established in beawer rajasthan india
•Major cement supplier of north india
•Brands:- shree ultra, bangur and Rockstrong.
•Power generation capacity :- 560 mw
•Cement production capacity :- 13.5 mtpa
•Turnover :- rs. 5,898.12 crores
•Net profit :- rs. 618.50 crores
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3. Introduction
• Shree cement limited engages in the manufacture and
sale of cement in India
• SCL is a quality conscious, energy conscious &
environment friendly business organization.
• Shree cement manufactures 33, 43, 53 & shree ultra
red
• Oxide grade cement in ordinary Portland cement.
• 16% share in Rajasthan cement production.
• 2.40% share in all India cement production.
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7. Load cell
•Load cell is based on the strain gauge principal.
•Load cell is made of high corrosions super alloy.
•Used to measure total weight passing through the bin.
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8. RTD
• Use electrical resistance and
require a
power source to operate.
• Platinum wire is used because
of its
high resistivity & linear
relationship.
• Range from -200Oc to 650Oc.
• High accuracy; Low drift
Wide; operating range; Suitable
for precision applications.
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9. Thermocouple
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• It’s used for measuring high degree of temp.
• use the See beck effect to generate a voltage.
• Range -200Oc to 1800Oc.
10. Optical pyrometer
• Employed for measurement of
furnaces, molten metals & other heated
materials.
• Used for range of 1000o f to 5000o f
• operates with nearly monochromatic
light.
• Wavelength is 0.01um wide at 0.65um
in the red portion of visible spectrum.
• Accuracy of about ±5%.
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11. Weight feeder
•Load per unit length multiplied by speed of rate of transfer in unit time & then
integrated.
• Rate signal is compared with set rate & error signal is produced.
• Controls belt speed through thyristerized D.C. controller.
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12. LEVEL CONTROL OF ROTARY PACKER
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• Vibro fork is placed in rotary packer.
• When the fork is above the cement level vibration signal
through quartz crystal sent to relay contact.
• Relay controls the valve to feed cement in bags.
• IN ROTARY
PACKER
• SENDS
VIBRATION
SIGNAL
VIBRO
FORK
• CHANGES
VALVE
POSITION
RELAY
CONTACT
FEEDER
VALVE
CEMENT
BAGS
13. KILN TEMPERATURE CONTROL
BY COAL FIRING
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• Kiln temp. is measured at kiln hood by thermocouple.
• Set point to the controller given by potentiometer
(1000Oc)
• Output of controller goes to thyristor control system
which control speed of coal feed.
KILN
HOOD
TEMPERATURE
CONTROLLER
THYRISTOR
CONTROL
SYSTEM
COAL
FEED
DRIVE
KILN
14. Conclusion
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Instrumentation & control has plays a major role in any
process industry & I have seen this in cement process
plant. Various instruments are used for measuring flow
rate; temperature; pressure etc. more accurately &
safely.
The various control systems are used to minimized the
human need in some critical places with high accuracy &
good control over controlled variables.