REVERSING MILL
Plant Specification
Year of manufacture 1962
Revamp 1998
Extent of revamp Total change of electric equipment
New process control system
New automatic guage control
New strip elongation control
Installation of hydraulic roll gap setting system
Both expanding mandrel reals changed
(including gear boxes
Production Range
Strip width 800 – 1570 mm
Maximum coil diameter 1800 mm
Maximum incoming gauge 6 mm
Minimumproduct gauge 0,25 mm
Strip quality Silicon alloyed mangnetic sheet steel , sheet metal for automotive bodies and white goods
Permanent set 50 -80%
Technical Specifications
Operational mode cold rolling, skin pass rolling, spooling
Maximum rolling speed 600 m/min
Maximum coil weight 27 to
Maximum coil diameter 1800 mm
Maximum rolling force 18 mn
Max. coiler driving power 150 kN
Work roll diameter 395 – 450 mm
Backup roll diameter 1230 – 1350 mm
Plant Assembly
Coil support ramp
Downcoiler double cone
Reversing coiler expanding manfrel
Diameter
Threading equipment
Coil remover
Edge control
Mandrel support
Pinch roll
Coil evacuation with hydraulic lift coil car
Guide roll 18 kW - diameter 500 mm
Strip blow off compressed air 5 bar, flat nozzle
Gauge measuring isotopic Toshiba
Strip break wood
Lateral guidance adjustable
Supporting rolls morgoil bearing, hydraulic tilt out 2 pairs in use
Work rolls twin drive with switch to pinion drive 2 x 950 kW per roll, bearing : four row tapered rolls, roll change with counterweight and crane
Rollcooling 3 segments in upper and lower position, charge and discharge 210 m3/h each, clear / waste water tank 60/120 m3 coarse filter, magnetic candle – type separator, paper filter skimmer, heating / cooling system
Rool gap adjustment sustem
Mandrel 200 mm travel,
Hydraulic plunger with servo-drive and reservoir
Reservoir 50 mm travel
2 positio encoders & 1 pressure sensor for each plunger
210 bar = 18 MN rolling force
Gauge measuring isotopic, product of tosiba
Strip air wipe system compressed air, 5 bar, flat nozzle
Guide roll 18kW, diameter 310 mm
Reversing coiler 2 expanding mandrel 2 x 2840 kW , Diameter 560 – 620 mm, threading equipment , coil remover. Edge control, mandrel support pinch roll coil evacuation with hydraulic lift coil car
Hydraulic system 100 bar
Drive motors Siemens 400 V GS, thyrisor fed SIEMENS Simoreg
Supply drives 500 V DS
Control system SIEMENS Simatic S5
Gauge control
Strip elongation control
Drive control INTEL multibussystem
Visualization prolink
Guage control
Gaugmeter, pre control, mass flow & monitor
Gauge accuracy better than +/- 2%
Strip elongation control
Degree of extension 5.5 – 10 % with liquid skin pass agent
Ref : 121113
EASTERN EUROPEAN, 6” STIEFEL SEAMLESS TUBE ROLLING PLANT
Manufacturer: Eastern European
Process: Stiefel (Plug Mill)
Inlet Material to the Piercing Mill: Round Billets
Diameter: 90 – 180 mm (5.54” – 7.09”)
Length: 600 – 3,200 mm (23.6” – 126”)
Product Sizes: Diameter: 69 – 168 mm (2.72” – 6.61”)
Length: 13,500 mm (44’ 3”)
Finishing Rolling Speed: 0.7 – 1.5 m/sec. (138 – 295 FPM)
Main Plant Components:
1. Billet Shear for cutting the inlet billet to the length suitable for Rotary Reheating Furnace.
2. Rotary Heart Reheating Furnace.
3. Piercing Mill:
• Inlet Round Billet: Diameter: 90 – 180 mm (5.54” – 7.09”)
• Billet Length: 600 – 3,200 mm (23.6” – 126”)
• Pierced Hallow Diam.: 70 – 175 mm (2.76” – 6.89”)
• Pierced Hallow Length: 3,000 – 8,000 mm (9’ 10” – 26’ 3”)
• Roll Diameter: 860 mm (33.86”)
• Roll Length: 500 mm (19.69”)
• Roll Angle: 4 – 12 degrees
• Main Drive Power: 900 kW
4. Plug Mill (Stiefel Rolling Stand):
• Inlet Hallow Diameter: 70 – 168 mm (2.76” – 6.61”)
• Inlet Hallow Length: max. 13,000 mm (42’ 8”)
• Roll Diameter: 700 mm (27.56”)
• Roll Length: 1,700 mm (66.93”)
• Rolling Speed: 3.2 m/sec (630 FPM)
• Main Drive Power: 800 kW
5. Reeler Mills:
• Number of Mills: 2
• Roll Diameter: 580 mm (22.83”)
• Roll Length: 680 mm (26.77”)
• Roll Angle: 4 – 12 degrees
• Main Drive Power: 300 kW (each mill)
6. Reheating Tunnel Furnace
7. Sizing Mill:
• Number of Rolling Stands: 7
• Final Tube Diameter: 69 – 168 mm (2.72” – 6.61”)
• Max. Tube Length: 13,500 mm (44’ 3”)
• Roll Diameter: 400 – 500 mm (15.75” – 19.69”)
• Rolling Speed: 0.7 – 1.5 m/sec. (138 – 295 FPM)
• Main Drive Power: 300 kW
8. Cooling Bed
9. 6-Roll Rotary Straightener
10. End Cutting Saw
11. Inspection Station
Ref : 11116
JAPANESE BUILT 550,000 TPY MELT SHOP, DESIGNED TO PRODUCE 130 X 130MM BILLETS.
w/(5) EAF's, a 4-Strand CCM and two Bar/Rod Rolling Mills
Built 1996
This is a Melt Shop with two Bar/Rod Rolling Mills.
All built around 1990 and still in production. Scheduled to cease production in April of 2010.
Electric Arc Furnaces
(2) 50T EAF's capable of producing up to 550,000 Tpy
Continuous Casting Machine
Japanese built (4) Strand CCM. Designed to produce 130 x 130mm billets.
(2) Rolling Mills as follows:
15-Pass Mill
Produces 3/4” ~ 1-1/4” diameter product. The Finishing Mill stands are equipped with
DC motors, while the other motors are AC.
19-Pass Mill
Produces 3/8” ~ 22mm , 300,000T/Year , all the roughing mill stands are fiber bearings
but the intermediate and finishing stands are all roller bearings.
The weight of everything is around 6000 Tons not include the building.
Technical Specification for Melt Shop (A) & Bar mill (B)
A. Melt shop equipment
Part 1 Main features of equipment
• EAF
o Quantity: 2 sets
o Type: AC
o Tapping weight: 50 ton
o Transformer size: 25 MVA
o Electrode diameter: 18”
o Alternative energy:
(PTI) 2 injectors for one furnace
Lance manipulator: 2 sets (Consumable lance)
o Tap to tap time: 85 min.
• CCM
o Quantity – 1 set
o Radius: 5m
o (4) strands
o Mould size: 130 x 130mm
o Cut to length: max 3.2 m
o Casting speed: 2.4m/min for 120 sq mm
o Mould oscillation: mechanical drive
o Strand cutting: by hydraulic shear
Part 2 Electric Arc Furnace Equipment
Included Items:
• EAF raising (lifting) system
• Raising system for furnace lid. –Furnace Shell, furnace wall water tank
• Dust collecting system
• Other material charging system
• Equipment of rotating furnace lid
• Furnace inclined system
• Scrap transport system
• Auxiliary burning system
• Refractory gunning machine
• Carbon injector
• Oxygen blowing car
Part 3 CCM Continuous Casting equipment
Included item:
• L/D ladle equipment
• T/D guiding device
• Mold vibration system
• APRON vessel type roller
• Water spray system
• Guiding direction machine
• Roller path
• Shear
• Inclined roller
• P/S pusher
• Cooling bed
• Rectify machine, shear hydraulic system
• P/S hydraulic system
• Preheating station
• Casting oil system
• Pull billet cha
Ref : 10111
CONCAST CONTINUOUS CASTER
AGE 1996
BILLET SIZE : 6-1/4” x 6-1/4” x 30’to 48’ length – (150mm to 170mm range)
PRODUCTIVITY : 500,000 tpy
STRANDS : Three strand
RADIUS : 9 Meter
MOLDS : Curved “CONVEX” type
OSCILLATION : Short lever system
COOLING : 3 zones with closed loop control
DUMMY BAR : Rigid type with permanent head and automatic disconnect
WITHDRAWAL : CCS (Concast continuous straightening) adj. clamping force
SPEED : 2.7 up to 3.7 meters per minute
CUT OFF : Torch – 9.6 to 14.6 meter length
TURRET : Ladle turret – two fixed arms with weighing
FEATURES : 5 Tundishes
2 Tundish cars with weighing
Billet cross transfer walking beam cooling table
Ref : 9111
