HITACHI 1250MM 6-HI STEEL COLD ROLLING MILL PLANT YEAR 1971

 

 

Used second hand 1250mm 6-hi Steel Cold Rolling Mill Plant
Make: Hitachi(Japan)
Year: 1971
Overhaul and remodeling: 1993
Reversing type
Production Capacity : 37,000 ton/month=444,000ton/year             
Line Speed: 1,590 mpm
Material Entry Gauge: 1.8 – 4.0 mm,
Material Exit Gauge: 0.20 – 2.0 mm
Strip Width : 610 – 1,250 mm
Max. Coil Weight : 20 ton
Coil I.D. Entry/Delivery: 508 mm, 610/508 mm
Max. Coil O.D. E/D : 2,000 / 2,000 mm
 
(Mill Specification)
Roll Diameter Range Work Roll: 370 – 420mm
Roll Diameter Range Intermidiate Roll: 440 – 490mm
Roll Diameter Range Back-up Roll: 1,050 – 1,200 mm
Roll Barrel Length: 1,420 mm
Ordinary Rolling Load : 14.7 MN
Mill Motor: Direct Current *at 60Hz
Mill Motor replaced Year : 1993
Power Supply and Power : SCR, 5,000 (2,500x2) kW
No. of Revolutions Top/Base : 804/287rpm
Gear Ratio (Drive side : Non Drive) : 01 : 00.7
Response Capability of Mill Motor : 8.2 rad/s
Type of Mill Drive : Single Drive
Pay Off Reel Mandrel type: Single type
Pay Off Reel Mandrel Motor Power: 410 kW
Entry Tension Reel Mandrel type: Single type 
Entry Tension Reel Mandrel Motor Power: 2,960 (1480x2) kW
Delivery Tension Reel Man. Type : Single type
Delivery Tension Reel Man. Motor Power: 2,960 (1480x2) kW
Entry Guide : Vertical Roller
Screw-down Type, Mill Modulus : Hydraulic, 3,922 kN/mm
Screw-down Response Capacity : 20 Hz
Bearing WR/IMR Type : Taper Roller Bearing
Lubrication : Oil Mist
Buck Up Roll Type : Roller Bearing
Lubrication : Oil Mist
 Roll Changing Type  WR, IMR, BUR :  Hydraulic Roll Changer
Roll Bending WR Max. Load odf INC and DEC:  392,196 kN/chock
IMR Max. Load odf INC : 490 kN/chock
IMR Shift : Own
Pressure Gauge Type, Manufacturer  : Load Cell, ABB(U.S.A)
Thickness Gauge Detector Type, MFG : X-ray, Toshiba(Japan)
The location of thicknessess Gauge Detector: Entry/Delivery
Shape Control Detector Type, MFG : Divided Rolls Contact Method, ABB
 Automatic :  None
Computer Type, MFG : H-04Mx3, Hitachi(Japan)
Rolling Oil System : Recirculation,Density Measurement:Supersonic Wave Method (Automatic)
Roll Coolant  Dirty, Clean Tank Capacity : 40 m3 x 1 unit, 40 m3 x 1 unit
Mixing Tank Capacity : 2 m3 x 1 unit
Pump Capacity Max. Pressure : 0.8 MPa                             
Pump Discharge Volume : 6.9 m3/min,                            
Spot Cooling : Own, Filter Type, Capacity : Electro-Magnetic, 140 m3/hr
Cellar Operation (Automatic) : None
Hume Exhaust Fan Motor Capacity x No.: 190 kW x 1 unit
Hume Exhaust Fan Volume : 2,500 m3/min 
Cellar Ventilation Fan Motor Capa. x No.: 37 kW x 1 unit
Cellar Ventilation Fan Max. Volume : 1,400 m3/min 
Fire Fighting Cellar Type : Carbon oxide, Stationary
Mill  Type : Sprinkler(water),                                                                  
Hoop Cutter Type, MFG : Winding, Kohan(Japan)
Hooping Machine Type, MFG : Seal type, Kohan(Japan)