Zenica Continuous Billet Mill
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Description
Main mill parameters:
Year of commissioning : 1976 shutdown 1991
Main suppliers
Mill Mechanical: SKODA
Mill finishing: SKODA
Reheating furnace: LENGIPROMEZ
Mill electrics: CKD Czechoslovakia
Plant installed capacity: 1,200,000 t/year
Annual mill capacity: 2,000,000 t/year link to furnace capacity
Major revamping done: 1989
New control system installed for finishing stand nos.8, 9, 10
Computer control added for shearing of billets 80 to 115 mm square
Raw material:
Continuously cast blooms: 265x340 mm
Length: 4500 to 10 000 mm
Max. Weight: 7100kg
Finished products:
Squares: 80x80, 115x115 mm up to 150 x 150 mm
Max. Rolling speed: 3.5 ms -1
Equipment / Facilities Features :
Reheating furnace:
1 no. Walking beam type furnace of capacity 300 t/hr.
Fired by natural gas/mixed gas/HFO (fuel possible)
10 stands :
2 nos. 850 mm horizontal stands having 1200 mm barrel length,
Individually driven by 1300 KW DC motors
1 bloom tilters for 90 deg turning after stand no.2
1 no. 850 mm Horizontal stand
1 no. 730 mm Horizontal stand
1 no. 730 mm Vertical stand
1 no. 730 mm Horizontal stand
1 bloom tilters for 45 deg turning after stand no.4
1 no. 530 mm Vertical stand
1 no. 730 mm Horizontal stand
1 no. 530 mm Vertical stand
1 no. 730 mm Horizontal stand
All stands individually driven by 1300 KW DC motors
Shears:
2 hot shears after last stand of capacity 100 T & 250 T cutting 150 mm
& 80 mm billet respectively.
Equipment / Facilities Features:
Cooling bed:
3 cooling beds equipment with pushers each of size 12 m x 30 m and divided
Into 2 sections
Finishing facilities:
One line for cold cutting of billets with 630 t capacity shear
Lubrication system:
Oil - 10 systems, one for each stand
Grease total 15 systems for stands and shears
Hydraulic system:
2 systems, one for the furnace and one for the mill
Electrics:
10 nos. Electro motor typ MEZ-ESSR ZAS 5460F/8 , 1300 KW,
1840/3680A, 750 V, 250 575 rpm DC motor for main stand drives
Auxiliary facilities:
Water hydrant system & portable fire extinguishers
Reheating furnace:
Main parameters:
Charge to be heated: Cast Blooms 265 x 340 x 10 000 mm
Weight of 1 piece: 7100 kg
Usual material grade: Low-carbon steel
Max. Furnace output: 300 t/hr
Max. Heating temperature: 1280 C
Flying shear 100 Mp
Max. Cutting force: 100 mpa
Max. Section to be cut from 80 mm square to 100 mm x 100 mm
Max. Speed out: 3.5 ms -1
Min. Temperature of cut: 900 celsious degrees
Year of commissioning : 1976 shutdown 1991
Main suppliers
Mill Mechanical: SKODA
Mill finishing: SKODA
Reheating furnace: LENGIPROMEZ
Mill electrics: CKD Czechoslovakia
Plant installed capacity: 1,200,000 t/year
Annual mill capacity: 2,000,000 t/year link to furnace capacity
Major revamping done: 1989
New control system installed for finishing stand nos.8, 9, 10
Computer control added for shearing of billets 80 to 115 mm square
Raw material:
Continuously cast blooms: 265x340 mm
Length: 4500 to 10 000 mm
Max. Weight: 7100kg
Finished products:
Squares: 80x80, 115x115 mm up to 150 x 150 mm
Max. Rolling speed: 3.5 ms -1
Equipment / Facilities Features :
Reheating furnace:
1 no. Walking beam type furnace of capacity 300 t/hr.
Fired by natural gas/mixed gas/HFO (fuel possible)
10 stands :
2 nos. 850 mm horizontal stands having 1200 mm barrel length,
Individually driven by 1300 KW DC motors
1 bloom tilters for 90 deg turning after stand no.2
1 no. 850 mm Horizontal stand
1 no. 730 mm Horizontal stand
1 no. 730 mm Vertical stand
1 no. 730 mm Horizontal stand
1 bloom tilters for 45 deg turning after stand no.4
1 no. 530 mm Vertical stand
1 no. 730 mm Horizontal stand
1 no. 530 mm Vertical stand
1 no. 730 mm Horizontal stand
All stands individually driven by 1300 KW DC motors
Shears:
2 hot shears after last stand of capacity 100 T & 250 T cutting 150 mm
& 80 mm billet respectively.
Equipment / Facilities Features:
Cooling bed:
3 cooling beds equipment with pushers each of size 12 m x 30 m and divided
Into 2 sections
Finishing facilities:
One line for cold cutting of billets with 630 t capacity shear
Lubrication system:
Oil - 10 systems, one for each stand
Grease total 15 systems for stands and shears
Hydraulic system:
2 systems, one for the furnace and one for the mill
Electrics:
10 nos. Electro motor typ MEZ-ESSR ZAS 5460F/8 , 1300 KW,
1840/3680A, 750 V, 250 575 rpm DC motor for main stand drives
Auxiliary facilities:
Water hydrant system & portable fire extinguishers
Reheating furnace:
Main parameters:
Charge to be heated: Cast Blooms 265 x 340 x 10 000 mm
Weight of 1 piece: 7100 kg
Usual material grade: Low-carbon steel
Max. Furnace output: 300 t/hr
Max. Heating temperature: 1280 C
Flying shear 100 Mp
Max. Cutting force: 100 mpa
Max. Section to be cut from 80 mm square to 100 mm x 100 mm
Max. Speed out: 3.5 ms -1
Min. Temperature of cut: 900 celsious degrees
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Zenica Continuous Billet Mill