Hitachi        6-Hi reversing mill
Built:    1976    Shut down: 2014

Revamped:     2010 Control system – changed DC to AC motors
Load cells were replaced in March 2005 & thickness gauge in March 2009
Roll coolant cooler was replaced in July 2009
Control boards of hydraulic screw down & electromagnetic valves were replaced in 2009.

Input Steel  coil  width:      610 – 1330 mm
Thickness Entry:         1.6-4.5 mm     Exit: 0.15 – 2.3 mm

Price:             Asking

Coil weight:     21 Ton            Entry Coil ID: 550-630 mm                Exit Coil ID:  610/508 mm

Coil OD:          2050/2050 mm                      Capacity:         31,000 t/month

Roll diameters:           Work rolls: 405-440 mm        Length:            1420 mm

Intermediate rolls: 460-510 mm                    Length:            1395 mm

Back-up rolls:  1220 – 1345 mm                    Length:            1420 mm

Ordinary rolling load:  20 MN

Mill motor AC New in 2010               Power:  5000 kW, 1160/430 RPM    Gear ratio: 1:1

Response capability of mill motor:    10 rad/sec.

Type of mill drive        Single drive

Pay off reel     Single type mandrel   Power: 450 kW, 850/310 RPM          Gear ratio: 2.2:1

Entry tension reel       Single type mandrel   Power: 2900 kW, 840/235 RPM   Gear ratio: 1:1

Delivery tension reel Single type mandrel   Power: 2900 kW, 840/235 RPM   Gear ratio: 1:1

Entry guide                 Vertical roller

Screw down    Hydraulic type            Mill modulus:  4707 kN/mm   Response capability: 25 Hz

Bearings         Work & Intermediate rolls: Taper rolling bearings    Lubrication: Oil mist

Back-up rolls:  Roller bearings           Lubrication:     Oil mist

Roll changing type:    Hydraulic drives

Roll bending    Work rolls        Max. load of INC and DEC    255(INC), 0(DEC) kN/chock

Intermediate rolls        Max. load of INC        0 kN/chock

Intermediate shift

Pressure gauge          Mfc.:    ABB                Type:  Load Cell

Thickness gauge        Mfc.:   Toshiba           Type:   X-ray               Location: Entry

Control system           Mfc.:   Hitachi            Type:   R700

Rolling oil        System: recirculation             Density measurement: Supersonic Wave Method

Roll coolant     Dirty tank: 22 m³                    Clean tank: 42 m³

Pump capacity           Max. pressure: 0.8 MPa        Discharge volume: 2.8 m³/min.

Installed 3 pumps      Operating 2                 Filter    Type: Magnetic Separator

Exhaust fan    Motor power: 300 kW            2500 m³/min

Cellar ventilation fan  Motor power: 30 kW  600 m³/min.

Fire fighting     Cellar  Type:   Carbon dioxide, sprinkler       Mill      Type: sprinkler (water)

Available Rolls and Chocks             

Roll total          Chocks           SET

                                                                       Roll (2 pcs/set)           Chock (4 pcs/set)

WR                 30                    8                      15 sets                                    2 sets

IMR                 11                    8                      5 sets                          2 sets

BUR                6                      8                      3 sets                          2 sets

Spare parts:                Large amount of spare parts

photo
６hirolling mill

 If you are interested in this plant, please contact us by email or Whatupp/wichat
email : papillonkitano@outlook.jp
whatupp/wechat : 81-80-8537-9518
Takashi Kitano
Papillon Co Ltd.