Description:

STAINLESS STEEL MELT SHOP PLANT INCLUDING SLAB AND STRIP CASTING LINES

Stainless Steel Melt Shop Plant Including Slab And Strip Casting Lines
Mfc.: Demag, BSE, SMS, SIEMENS, M&W Built: 1998, 1999, 2001
Revamped: 2009
Slab Dimensions: 800-1.600 x 175, 210, 240 mm Max. Length 12.000 mm
External hot rolling process! Dim.: 800-1600 x 4 – 6 mm thickness
Strip Caster - dimensions: Width 1.130 + 1.450 x thickness 2.4 – 6.0 mm
Rolling mill - after rolling process: 1.130 – 1.450 x 1.5 -2.5 mm
Capacity: 20 melts/day - 600,000 T/annum
Consist of: Scrap storage device UHP Electric Arc Furnace
AOD Converter System Secondary Metallurgy Continuous Slab Casting Plant
Miscellaneous Strip Casting Plant 4-Hi Rolling Mill Flying Shear
Cross Cut Shear Overhead Cranes Dust Removal System
Technical Data

SCRAP STORAGE DEVICE

• (5) Transfer Cars for transport of Scrap Buckets
• (5) Multiple-Disk Scrap Buckets
• (4) Rectangular Grabs
• (5) Multi-line Grabs
• (3) Clamshell Grabs
• (2) Magnets
• (2) Rotary Disks
UHP ELECTRIC ARC FURNACE
• Mfc.: DEMAG Capacity: 80 (86) Ton Diam.: 6.35 Meter Built: 1998
Electrode Controler Converted to Hydr. and in 2011 new furnace rocker, casing and gantry
installed by “BSE” and in 2011 new 80 MVA Transformer
“ABB” supplied Control SimaticWinCC (2011),
Siemens SIMELT, Hydr. Electrode Controler (2004)
“SMS”: Simelt-Nec Heat Load Monitors;
Lipp Furnace with with split upper and lower shells Conventional
Tilting Casting Diam.: 6.35 M Electrode diam.: 610 mm
diametral pitch 1.200 mm Fore-Blow approx.: 250 Nm Oxygen on Si
Cooling Wall and Cover Tap-to-Tap Time: 72 Min. Product Range 100%
Stainless Steel Types
• Hot Steam-Cooled Furnace Swivel Arm
• 2 MW Door Burner (natural gas/oxygen) and Oxygen Lance Manipulator
1 1/4” Pipe Max. flowrate: 2.100 Nm³/h
• Gunning Material Manipulator ”RHI” with Silo (2005)
• Steel and Slag Rail-Carrier, holding Decanting Ladle (96 Ton) and Slag Pot (9 M³)
• Slag Rail-Carrier

AOD CONVERTER SYSTEM

• (2) SIEMENS VAI AOD Converters revamped in 2009
interchangeable converter casings converter trunnion
rings with cooling system new converter bearings and stands
new tipping gearbox incl. drives new converter casing
entire valve station exhaust manifold hoods
new charge hoppers converter change rail-carrier
extraction system. Controls “Siemens” Simatic PCS 7 (2005)
• Converter Vessel, AOD Process with (5) submerged nozzles
Volume 88 M³ (excluding lining) 46.5 M³ (new lining)
Tapping weight max. 96 Ton, Transport Weight (including lining) 170 ton.
• Converter Trunnion Ring water cooled-trunnion ring
• Converter Tipping Drive
• Valve Station for Process Gasses
• (2) Blowing Lances, Length 13 M, Lift 12.5 M

• Temperature Measuring and Sampling Lance (Sub-Lance)
• Additive Storage and Supply System
• Exhaust Hood and Cooling Stack
• Converter Doghouse
• Converter Changing Rail Carrier, Payload 170 Ton, Speed 10 M/Min, Hydr. Lift.
• Steel and Slag Rail-Carrier, Load 190 Ton, Speed 25M
• Slag Rail-Carrier
• Converter Lining Stand

SECONDARY METALLURGY

• Hopper System (12) Overhead Hoppers with 3 Discharging Carriers
• Argon Stirring Station (2) stirring areas

“SACK” CONTINUOUS SLAB CASTING PLANT

• Controls Siemens PCS-7 (2002)
• Slab Dimensions: 800-1.600 x 150 - 240 mm Max. Length 12.000 mm
• Melting Weight 90 Ton Radius 9.800 mm Average Casting speed: 1.0 M/Min.
• Ladle Turret: for (2) Ladles
• Ladle Shroud Manipulator Length 900 – 1.200 mm
• Tundish Turner (2) Max. Charge 16 Ton Turning angle 180°
• Stopper Rod “ Zimmermann & Jansen”
• Heating Fire System for Tundish
• Mold Casting radius: 10.750 mm Width: 800 -1.600 mm x thickness 175, 210, 240 mm
• Mold Lifting Table
• Segments 1 Total No. of Rollers 24
• Segments 2-15
• Intermediate Roller Table
• Flame Cutting Machine with Roller Table
• Exit Roller Table with Emergency Slab Discharge
• Walking Beam Coolant Bed
• Dummy Bar System
• Stamping and Marking Unit
• Workshop for Mold and Segments
• Tundish Shop

NOTE: EXTERNAL HOT ROLLING PROCESS!

MISCELLANEOUS

• (13) Ladles + (5) Decanting Ladles + (3) Emergency Ladles
• (9) Ladle Slide Gates + (8) Ladle Fires + (1) Ladle Car
• (12) Tundishes + (1) Tundish Cover + (6) Overflow Buckets
• (2) Lifting tables
• (12) Molds
• Many Segments
• Many Auxiliary Parts
• Spare Parts

LADLE SERVICE AREA

• Ladle Fires and Drying Fires
• Steel-Slag Ladle Carrier

HOPPER SYSTEMS

• (14) Sunken Hoppers
• Lime Storage Hopper
• Hopper System AOD (15) Hoppers and (4) Bunkers

SLAB GRINDING SHOP

• (2) Slab-Grinders “Wilhelm Schlüter” Length: 4000-9.800 mm x width 380/800-1.600 mm
Thickness 80-250 mm Weight: 20/32 Ton Motors: 250 kW

OVERHEAD CRANES

• (2) Furnace Cranes 100/16/8 Ton and 100/5/5 Ton
• (3) Casting Cranes 170/150/50 150/50 Ton 135/50 Ton
• (6) Gantry Cranes from 3.2 to 100 Ton
• (2) Dogging Cranes 32/32 Ton
• (4) Cranes with Magnets from 8 to 20 T

DUST REMOVAL SYSTEM
• Electric Filters Capacity: 850.000 M³/h
• Dry Dust Removal Capacity: 335.000 M³/h
• Sunken Hopper Dust Removal Capacity: 45.000 Nm³/h
• Lime Hopper Dust Removal Capacity: 15.000 N/m³

STRIP CASTING PLANT

Mfc.: VAI (VOEST ALPINE INDUSTRIEANLAGEN) Built: 1999
Strip dimensions: Width 1.130 + 1.450 mm Thickness 1.8 – 6.0 mm
Max. Coil dimensions: OD: 2.200 mm x width 1.600 mm Coil weight: 30 Ton
Casting Speed: 150 M/Min Rolling Speed: 200 m/min.
Fully Automated 1999 and 2013
Melt weight: 90 tons
Construction dimensions of strip casting plant
Roller table via mill floor line: Approx. 800 mm - Casting platform: 3500 mm
Plant length: Approx. 90 m
Mechanical equipment
Ladle Turret - Manufacturer: "VAI"
Intake of two ladles of each approx. 160 tons, rotation radius 5.000 mm
Over-all rotation radius turret approx. 7.500 mm, 360° in both directions
Ladle weighing
Single stroke of the ladle carrier arms – maximum 1.000 mm
Rotary motion: unlimited - Drive power 45 kW
The ladle slide gate hydraulics are located within the ladle turret
- Emergency drive
Shroud Manipulator
- Manufacturer: "VAI" - Hydraulic Operation
- Shroud length: approx. 900 – 1000 mm
- Inertization possible - Replaceable fork
• Tundish Car - Manufacturer: "VAI"
- Intake of tundish: - Tundish weight: 13 tons
- Maximum melt: 16 tons
- Rail length: approx. 9 meters, stroke approx. 750 mm
- Weighing facility
- Continuous temperature rating by heating box probe
- Auxiliary facility: Infeed station / Infeed block for tundishes
• Stopper Mechanism Mfc.: “Zimmermann & Janssen”
- Deformation and motion: hydraulic
• Heating Fire for Tundishes and Immersion Tube Mfc.: “ MAPEKO”
Tundish heatingup to: 1.200 °C - Natural gas burner
• CASTING MACHINE 2-Rolling System with (8) Casting Roll Pairs; (2) Casting Frames
- Machine execution: - Casting width: 1130 mm -1450 mm
Casting Rolls
- In total 8 casting roll pairs, several widths, including fittings like inserts warehouse etc.
- 2 pairs 1130 mm, 1 pair 1330 mm, 1 pair 1390 mm, 4 pairs 1430 mm
- 1 pair spare jackets for 1430 mm
- Rolls Ø 1480-1520 mm - Water-cooled up to 8000 l/min/Roll,
- Electrical drive - Surface cleaning system
Inertization-Cover
- 14 zone-inertization with each 2 gas connections,
- Total volume max. approx. 400 Nm³/h - Covers for several widths H1130, 1330, 1430 I
Side Sealings
- Three complete structures compatible among each other
- Rotative and vertical possibility for oscillation via hydraulic
- Hydraulic screw-up and multiple possibilities of adjustment
- Heatable on both front and back side up to 1300°C within several zones
Casting Frame
- 2 casting frames, compatible among each other
- Quick-change frame including all media connections
- Approximate weight: 85 tons including casting rolls
- Approximate dimensions: 5 m*3.5 m*1.5 m
Metrology
- Solution level rating via mould level camera
- Temperature scanner (company Land) within heating box, in front and behind rolling stand
- Strip controlling camera within heating box
• Heating Box and Roller Table (approx. 25 Rolls)
- Approx. 25 roller table rolls Ø 280 mm, individually driven, water-cooled, for strip widths
up to 1600 mm
- Heating box fire-proofed covered, water-cooled panel,
- Heating box inertizable with up to 3.000 Nm³/h N2 HO2 < 0,5%I
- Ribbed table for strip guide, hydraulically shiftable
• Steering Driver
- Ø 600 mm, for strip widths up to 1600 mm, width of action 1100 mm, Electrical drive
- Hydraulically shiftable: vertical and bow-type shaped
- Connected to visual strip flow control (company Eckelmann )