75TON EAF + SLAB CASTER Lines
75TON EAF + SLAB CASTER Lines
1.BOF
Identification K1 K2
location according to scheme 02 03
technology OXYVIT OXYVIT
manufactured by
erection 1981, GO 1992 1991
bottom blowing of oxygen and powdered lime, post combustion of CO with use of two lateral ceramic
nozzles (K1) or with water cooled lance (K2)
hot metal (pig iron) charging amounts over 70 % of metallic charge
heat size 75 t
tap to tap time 40 – 45 min
time of flow oxygen 13 – 17 min
time of taping 3 – 7 min
carburizing additives, alloying additions and deoxidation agents are dosed automatically into ladle from
the containers during taping (as the first steps of deoxidation and alloying)
2.VACUUM STATION VD-VOD (ISSM)
location according to scheme 06
technology VD, VOD
manufactured by HEAVY MACHINERY
erection 2006
modern two-caisson equipment usable for: vacuum degassing under 1 mbar, chemical reheating, decarburization, desulphurization, removal of non-metallic inclusions, fine adjustment of chemical composition, thermal and chemical homogenization and inclusions modification
alloying device 6 storage bins system
four core wire and tube feeder
works on both caissons in simultaneous regime
equipment ensures reliable production of micro-alloyed and special steel grades with special
requirements including deep dehydrogenization and desulphurization of steel and precise alloying
in the required time and with minimum heat losses
3.LADLE FURNACE (LF)
location according to scheme 04
manufactured by VAI
erected 1995
transformer 12 MVA
electrodes graphite with diameter 300 mm
dedusting system dry
argon station 50 – 200 Nl/min
alloying device 6 storage bins system
two core wire and tube feeder
measuring and sampling device with manual probe changing
LF is used for heating, purging and alloying steel
4.CONTINUOUS CASTER (CC)
location according to scheme 07
manufactured by MANNESMANN DEMAG
erected 1995
annual slab production 950 000 t
slab sizes thickness: 145, 180 and 250 mm
width: 800 – 1 580 mm
mother slab length: 4,5 – 9 m
mould length 904 mm
machine radius 8 m
metallurgical length 22,067 m
casting speed 0,2 – 2 m/min
tundish capacity 15 t
number of segments 12 (segment no. 0 plus segments no. 1 – 11)
soft reduction segments no. 8 – 11
operating system (2nd level) system VAX made by VAI
operating system (1st level) PCIM made by MDH
slab torch cutter GEGA
slab marker STOMMEL & VOOS
5.SCARFING MACHINE
location according to scheme 47
manufactured by Gega Lotz GmbH
type K 7137
function one side /one pass scarfing
erected 2009
type of the machine scarfing machine with slab transport car and tool carriage
sizes and weights of slabs thickness: 145, 180 and 250 mm
width: 800 – 1 580 mm
length: 6 000 – 9 000 mm
weight: 9,36 – 27,73 t
carbon equivalent: 0,02 – 0,30 %
temperature: 20 – 600 °C
scarfing machine is used for removing shell defects of slabs
