Visakhapatnam Steel Plant

Presentation on theme: "Visakhapatnam Steel Plant"— Presentation transcript:

1 Visakhapatnam Steel Plant
Welcome Visakhapatnam Steel Plant Blast Furnace Dept. to

2 Blast Furnace Layout B H S GETS M C S T L R S GCP SGP S S Y SGP L R S
Main Charging Conveyor (D2) Main Charging Conveyor (D1) T L R S BF-3 April 2012 GCP SGP S S Y SGP L R S P S Y Traffic Build A S O P C M S M S SMS

3 Visakhapatnam Steel Plant
It has two Blast furnaces, one is Godavari and second is Krishna, both names are from important rivers of Andhra pradesh. Rated capacity of Blast furnace is 3.4 MT annually. At present both furnaces are producing at the rate of 4.0 MT annually by advancement and enhancement in the following thing Raw material quality Furnace technology and control Furnace availability by strengthening the facilities provided, skill ness and improvement in cast house technology. BF-3 is commissioned on 24th April 2012, it’s rated capacity is 2.5MT annually.

4 Normal Operating Parameters of V.S.P Blast Furnaces(working)
Blast volume:5200Nm3/min Blast pressure:3.35 kg/cm2 Hot blast temp.:1000 0C Blast humidification 50 to 60 gms/NM3 O2 enrichment 1.65% Top pressure:2 kg/cm2 Top gas temp.:150 0C C Cast/day:12-15 Av. production:5600 ton/day

5 Raw Materials for Iron Making
Sinter Iron Ore Coke Nut Coke Lime Stone/LD Slag Quartzite/Silica Bricks Mn Ore Iron Bearing Fuel Additives

6 SIMLIFIED FLOW CHART OF BLAST FURNACE
IRON ORE PELLETS & FLUXES SINTER COKE AIR BLAST BLAST FURNACE FLUE DUST SLAG HOT METAL BF GAS EXCESS TO PCM TO SMS

7 DIFFERENT SECTIONS OF BLAST FURNACE
Furnace proper including cast house Burden handling section Slag granulation plant & Slag handling conveyors Pigcasting machines Laddle repair shop Masses & Compounds shop Pig storage yard Slag storage yard

8 I Process Flow Diagram MCS S8 C6 S7 C5 S6 C4 Main Charging Conveyor
BF Gas S6 C4 Met. Coke Sinter Main Charging Conveyor BF GAS GCP S5 C3 Dust Catcher Horizontal Conveyor S4 C2 Flue Dust S3 C1 Nut Coke Pig Storage Yard Slag Storage Yard Iron Ore S2 A3 S1 A2 Additives PCM A1 Li quid Slag Hot Blast Pigs SGP Hot Metal Granulated Slag MCS SMS

9 FURNACE I Some of the features: Circular cast house with cranes
Four tapholes Cast house slag granulation Useful volume 3200m3 ; 12 m dia hearth PLC Controlled PW charging system Gas Expansion Turbine station for top gas recovery O2 Enrichment

10 Main Charging Conveyor
BURDEN HANDLING SECTION I Incoming Conveyors Junction House SH-1 SH-2 Bunkers Screens BF Weigh Hoppers Main Charging Conveyor Horizontal Conveyor

11 Over View of Burden Handling Section
b1/b2 conveyor: capacity: 2160 m3/hr Speed: 2 m/sec Width : 2000 mm D1/D2 Conveyor: Capacity: 2160 m3/hr Type: Steel cord Total No. of bins: 17 Sinter: 5 nos(2-735 m3 & m3) Iron Ore: 3 nos (950 m3) Coke: 6 nos (950 m3) Additives: 3 nos (400 m3) Material handled per day at BHS Coke : tons Sinter: tons Iron ore: 3900 tons Additives :150 tons

12 I SLAG GRNULATION PLANT
Four process lines per furnace, two each on either side of the furnace PL#2/6 PL#3/7 TH#2/6 TH#3/7 BF SGP RHS SGP LHS TH#1/5 TH#4/8 PL#1/5 PL#4/8

13 PIG CASTING MACHINE I Four double Strand Pig casting machines with a capacity of 1700 tons/day/machine Performance Records: Highest Daily pouring : 6723 tons on Highest monthly pouring: tons for Mar’93 Water Spray Water Spray Pigs Pig Storage yard Pig Wagon Lime Spray

14 I LRS & TLRS Ladle fleet consists of
30 open top ladles of 140 tons capacity 16 TLCs of 300 tons capacity Lining Life: Open top 300 to 320 heats TLC to 750 heats Ladle

15 MASSES AND COMPOUND SHOP
I Products: Mudgun Mass Runner Mass Taphole frame Mass Hydrated Mass Raw materials Used: Coke Breeze Pitch Grog Silicon carbide Plastic Clay Bauxite Resin Wash oil

16 BLAST FURNACE PRODUCTS
HOT METAL Analysis: C-4.3%, Si-0.40%, Mn-0.07%, S-0.036%, P-.09% SLAG Analysis: SiO2-35.0%, Al2O3-17.5%, CaO-36.0%, MgO-9.05%, FeO-0.39%, MnO-0.10, Basicity-1.03 To 1.04 GAS Analysis: CO-20.0 to 22.0%, CO to 21.0%, H2-2.0 to 3.0% Calorific value-700 to 740K.Cal/NM3

17 SPECIFIC CONSUMPTION PER TON OF HOT METAL
SINTER Kg Iron Ore Kg Fuel Coke Kg Nut Coke Kg Total Fuel- 530 Kg Air Blast cu.mts Oxygen to 23cu.mts Cost of production per ton of Hot metal till Jul’2011- Rs aprox.

18 I TECHNOLOGICAL IMPROVEMENTS
Use of castables at Cast house runner systems Amano scope for monitoring burden profile and gas flow PLC for top charging and as well as for batching at BHS O2 Enrichment of Blast PLCs for stove automation PLCs for SGP operation

19 Features of BF-3

20 Basic data Annual rated capacity 2.5 mt Useful Volume 3814 m3 ;
Working volume : 3230 m3 Hearth dia: 13 m ; No. of Tuyeres: 34

21 Main geometrical features
Hearth diameter: m Belly diameter: m Throat diameter: m Inner volume: 3814 m3 Working height: 25.9 m Working volume: 3230 m3 N° of tuyeres: 34 N° of tap holes: 4 Shaft angle 81° 24’47” Bosh angle 77° 22’17” Sump depth 2800 mm

22 Other Features Flat Cast house with full castable runners
Copper cooling staves in high heat zone New generation parallel hopper bell less top PCI with O2 enrichment Hydraulic mudgun & Drilling machine Level -2 automation INBA slag granulation system Super micro pore carbon blocks in hearth area. Waste heat recovery Closed loop cooling system with soft water, water cooled hearth bottom. Latest instrumentation Profilometer Radar probes RTDS in cooling elements for heat flux measurement.

23 Thank you UTPAL KR. PARUI A.G.M(o) B.F(Works)