AN OVERVIEW OF BOKARO STEEL PLANT INDUSTRIAL TRAINING REPORT PRESENTATION BY:- TARANG BANSAL ELECTRICAL 08EBKEE058 www.powerpointpresentationon.blogspot.com

CONTENTS Raw Materials and Materials Handling Plant Introduction Objective Departments Visited : Raw Materials and Materials Handling Plant Sintering Plant Coke Ovens and By Product Plant Blast Furnace Slabbing Mill Continuous Casting Shop Steel Melting shopII Hot strip Mill Cold Rolling Mill Result Conclusion

Introduction BOKARO SAIL is the fourth largest integrated Steel plant (PUBLIC SECTOR) in India. At present it houses five blast furnaces with total capacity to produce 4.5 MT of liquid steel. It manufactures Steel which is an alloy of iron and carbon where the carbon content is 0.2 to 2.5% which depends upon the grade of steel. Melting temperature of iron = 1536 degrees celsius.

Outer View

OBJECTIVE To interact and learn from the experience of trained engineers,supervisors and other organization employees. To differentiate between real working scenario and uncertainities and the text book knowledge and to analyse the gap between the two. To get an insight into the various processes and the sequence of steps in the manufacture of steel and other products. To understand and appreciate the extent of coordination required between various departments for the success of the organisation.

Raw Materials & Material Handling Plant (RMHP) Functions 4 Raw Materials Suppliers Process 18 Beds Wagon Tiplers Stackers Reclaimers

Coke Oven & BPP Battery of ovens. Coal is converted into coke in anaerobic conditions at temperature-1250 degrees celsius. Cars involved for production :- Pusher car. Guiding car. Quenching car. Charging car.

Sinter Plant Fed into sinter furnace on moving pallets Agglomerated mass of iron ore, flux Increases efficiency, reducibility, reduces coke rate Fed into sinter furnace on moving pallets Crushed cooled +5mm crushed sinter sent to BF & rest reused

BLAST FURNACE

Steel melting shops-sms1 & sms2 Steel melting- process of removal of impurities like carbon and silicon. Oxygen blowing process. It receives hot metals from blast furnace. Output of sms1 is in ingot form. Output of sms2 is in slab form. From sms2 it goes to continuous casting shop. Molten metal to CCS

SMS II

Continuous Casting Shop SRU : refining, composition, temperature Argon purging The main function of Continuous Casting Shop is to produce steel slabs directly from the molten steel coming from SMS-II and sending them to Hot Strip Mill (HSM) for hot rolling.

Slabbing Mill SMS 1 – Ingot route Ingot rolling Same function as CCS Shearing Piling

HOT STRIP MILL Hot rolling- plastic deformation of metal above crystallization temperature by squeezing it between pair of roller. The capacity of HSM=4 MT. HSM has 2000 mm wide strip Mill.

Cold Rolling Mill Annealing Grains elongated, permanent strain, hard & brittle Heated then soaked, makes it soft Skin Pass Mill Unrolled Rolled Surface hardening Finishing SHEARING SLITTING Pickling Line H2SO4 HCl Tandem Mill 5 stands(0.15mm) Hydraulic automation gauge control Computerized mill control Temp. Control Emulsion spray

Electrical equipments in Sail SLIP RING MOTORS FOR A MILL FAN DCC AS INSULATION IN STATORS

Electrical repair shop 1 & 2 Ac Arc Welding : Only used in the transformers. Carbon Brushes : Repaired in the broker arm. Autotransformers: Used as the current regulators. Motors: Squirrel cage motors. Synchronous motors. Slip ring motors. SYNCHRONOUS MOTOR

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