multimetals presentation on annealing and pickling

8/2/2019 Multimetals Presentation on Annealing and Pickling

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Submitted By:

VISHESH VIJAY

7th SEM. ECE


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ORGANISATION PROFILE

Founded - 1962

Founder - MIKE JOHNSON

Headquarter s - U.S.A.

Products - Copper Tubes , 95/5 CuNi

&Cunifer Tubes 90/10 CuNi

Tubes 70/30 CuNi TubesRevenue - US $2.210 billion

Income - US$ 154 million

Employees - 3012 (2010)


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STEPS FORSTEPS FOR

MANUFACTURINGMANUFACTURING

INDUSTRIAL COPPERINDUSTRIAL COPPERUncoiling of CRFH

Coil at uncoilerWelding Degreasing

Entry looperAnnealing

in furnaceCooling section

Pickling Exit looper Skin pass mill

Tension levelerCreep looperRecoiling of

CRFH coil

at exit


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WELDING SECTIONWELDING SECTION Type -Guild Model QMM 125-54, Quick lap Seam Welder Material 200,300,400 CRSS Max. Strip Width 1300mm Min. Strip Width 600 mm Max. Strip Thickness 3.0mm

Min. Strip Thickness 0.3mm Electrics 415/3/50Weld Process Continuous Seam


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Degreasing sectionDegreasing section (i) First degreasing stage - Spray degreasing

machine (ii) Second degreasing stage - Chemical scrub brush (iii) Rinsing section - 3 Stage cascade rinsing

(iv) Length of degreasing section 18.15 meters (approx)


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ANNEALING FURNACEANNEALING FURNACEAnnealing is done to:

1. To regain grain structure

2. To increase malleability and ductility.

3. To attain mechanical properties.

ANNEALING STAGES

1. Recovery

2. Recrystallization

3. Grain growth


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Cooling Furnace section

Length of Section is 135 m

10 Air Jet Cooling Chamber

2nd & 9th Jet Cooling chamber is havingMist cooling also to assist avoiding carbide

precipitation..

Length of Cooling Section 52.5 m

6 burner control Zone


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Jet cooling section


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PICKLINGPICKLINGThe function of pickling is to dissolve/ remove/ peel off oxide layer on surface

of strip.

Such oxide layers are formed during hot rolling and incase of cold rolled strip during annealing operation.

Pickling is done in three sections:-

Neolyte electrolytic pickling section

Nitric Electrolytic Pickling Section

Mixed Acid Pickling Section


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COIL AFTER PICKLINGCOIL AFTER PICKLING


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Skin Pass MillSkin Pass MillSkin passing is done to

1. To improve strip shape.

2. To impart the desired surfacefinishto steel.

3. To produce desired mechanicalproperties.

4. To eliminate minor surfaceblemishes.

5. Masking of yield point


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Tension LevelerTension LevelerThe purpose of tension leveling is to bring all the fibers

in the metal to equal length

To achieve Desired strip elongation(0-2%) and strip flatness

Tension leveler consists of Entry bridle, Tension leveler wettype process, Exit bridles

Type wet type.

Design One set of bending roll cartridge

Two sets of anti cross bow roll cartridge

Tension 350 KN (max.)


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DCS Hardware

Controller card

Input cards (4-20mA,Thermocouple,RTD ,Digital,SOE).

Output cards(4-20 mA

,digital)Power supply module.


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Benefits of DCS are:High reliability.

Improved response time.

Improve operator interface to plant.Improve accessibility of plant data to

engineering & management personals.

Historical storage and retrieval system.


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Programmable logic

controllerA programmable

logic controller (PLC)or programmable

controller is a digitalcomputer used forautomation ofelectromechanical

processes, such ascontrol of machineryon factory assemblylines.


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Difference b/w DCS and PLCsDCS PLCs

Wide Range of

communication.Used for the entire plant

It is redundant

Response time is higherSettings can be change

Does not have wide

range of communicationUsed for particular unit

Not redundant

Very less response timeOnly vendor can change

the setting


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SCADA

SCADA stands forSupervisory Control And Data

Acquisition.

It generally refers to industrial control systems:

computer systems that monitor and control

Industrial infrastructure or facility-based processes,

include those of manufacturing, production, power

generation,Fabrication and refining.


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Transducers

Installed in furnaces to measure, monitor and

regulate the temperature

There are so many type of transducers:

Temperature transducer

Pressure transducer

Flow transducer etc.


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Resistive TemperatureDetectorRTD: Probably the most common temperature sensor

is the metal RTD or Resistive Temperature

Detector, which responds to heat by increasing

its resistance to electric current. The freezing

temperature of water is used as the reference

temperature.

R = R0 (1+T) for +ve temp coeff.

R = R0 (1-T) for -ve temp coeff.


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Characteristic curve of RTD


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Characteristic curve of Thermocouple


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3. Strain gauges:

strain gaugesare sensors that measuredeformation due to pressure. the strain

gauge is stretched; the conductorreduces its cross-sectional area and thuscan carry less current. the change inresistance is small and so requires a

reference resistance and compensatingcircuitry to compensate for other sourcesof resistance changes (such as temp.)


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multimetals presentation on annealing and pickling

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