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A MAHARATNA COMPANY OF GOVERNMENT OF INDIA

DURGAPUR STEEL PLANT ONE OF THE FIVE INTEGRATED STEEL PLANT OF STEEL AUTHORITY OF INDIA LTD. A MAHARATNA COMPANY OF GOVERNMENT OF INDIA. Set up in late 50’s.

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A MAHARATNA COMPANY OF GOVERNMENT OF INDIA

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  1. DURGAPUR STEEL PLANT ONE OF THE FIVE INTEGRATED STEEL PLANT OF STEEL AUTHORITY OF INDIA LTD. A MAHARATNA COMPANY OF GOVERNMENT OF INDIA

  2. Set up in late 50’s. • Initial annual capacity of 1 million tons of crude steel per year, the capacity of Durgapur Steel plant (DSP) was later expanded to 1.6 million tons in the 70's. • Massive modernization program was undertaken in the plant in early 90's, which, while bringing numerous technological developments in the plant, which enhanced the capacity of the plant. • Production target for 2016-17 is 2.23 MT of hot Metal DURGAPUR STEEL PLANT

  3. BLAST FURNACE DEPARTMENTDURGAPUR STEEL PLANT

  4. Four Blast Furnaces • Presently BF#2, 3 and 4 are running catering to the requirement of DSP • Rated daily production capacity of BF is 1820 T of #2 & 3 and 2340 T of #4. BLAST FURNACE DEPARTMENT

  5. BLAST FURNACE DEPARTMENT

  6. Blast furnace,a vertical shaft furnace that produces pig iron by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of ore, coke, and flux fed from the top. • Blast furnaces are used to produce pig iron from iron ore for subsequent processing into steel. What is a Blast Furnace

  7. Coke Oven (Coke) Sinter Plant (Sinter) RMHP (Iron Ore & Fluxes) High Line Charge Skip Stock House O2 SMS/Pig casting M/c Hot Air Hot Metal Stoves Cold Air Ladle Steam PCI / CDI Process Flow of Blast Furnace BF Gas GCP BF Network BF Gas Holder Double bell system Slag SGP

  8. Layout of a Blast Furnace

  9. Stock House and High line • Stoves • Cast House • Slag Granulation Plant • Gas Cleaning Plant • Coal Dust Injection • Pig Casting machine • Ladle Repair Shop Major Sections of Blast Furnace

  10. Consisting series of bunkers for different input materials. • Type of Feeding:- • 1. Conveyor route. • 2.Off loading through wagons. • Total nos. of Bunker – 101 • Each furnace having – 24-26 bunkers. Stock House and highline

  11. Material from bunkers are fed to the furnace with the help of different feeders, conveyors, screens, weigh Hoppers and skip car Stock House and highline

  12. Iron Bearing Materials :- • Iron Ore • Sinter • Scrap • Coke • Flux :- BOF Slag /Lime stone • Additives – Mn Ore, Quarzite etc. Raw materials of Blast Furnace

  13. STOVE Cold Blast from Power Plant Hot Blast to Furnace GAS AIR FLUE GAS StovesThree stoves in each furnace, running in cycle

  14. Stoves

  15. Cast House

  16. Cast House

  17. Equipment of Cast HouseMud Gun Drill Machine

  18. Molten Slag from furnace is granulated with help of high pressure water jet and sent to yard through conveyors • In DSP, INBA type SGP is installed in BF#3 and Russian rotary dehydrator type is installed in BF#4 • Granulated slag is a raw material for cement industry Slag Granulation Plant

  19. BF Gas is cleaned in the GCP and used as fuel for heating the stoves and re-heating furnaces of different mills • It consists of dust catchers, scrubber and electrostatic precipitators to clean the gas Gas Cleaning Plant

  20. Gas Cleaning Plant

  21. Coal dust is a cost effective alternative of coke. It uses non coking coal. This coal is cheaper than the metallurgical coke. • It is 1:0.9 replacement of coke • The productivity of blast furnace improves since coal injection is accompanied with oxygen injection Coal Dust Injection Plant

  22. CDI Flow chart

  23. As a fuel, providing heat. • Burden support. • Creating permeability. • Act as a reducing agent. Function of Coke

  24. The surplus hot metal, after fulfilling the requirement of BOF, is poured in Pig Casting Machines. • DSP has three numbers of PCMs Pig casting Machine

  25. Quality parameters requirement of input material

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