Ladle Nozzle

Upper nozzle service life has significant affluence on ladle bottom life, while ladle bottom life directly confines ladle life. RS series upper nozzles adopt latest matrix optimization technique and closest packing principle, their service life is significantly longer than competitors. RS upper nozzles character in excellent thermal shock stability, prominent oxidization resistance, strong washing resistance and so on.


Ladle upper nozzle physiochemical indexes

Item RS-SSK-1 RS-SSK-2 RS-SSK-3 RS-SSK-4
Al2O3 % ≥ 80 75 60 65
MgO % ≥ / / /
C % ≤6 ≤6 4 4
Bulk density g/cm3 ≥ 2.9 2.8 2.6 2.65
Modulus of rupture Mpa ≤ 15 15 15 15
Crushing strength Mpa ≥ 70 60 40 25

Ladle lower nozzle

RS series lower nozzle raw materials are corundum, high alumina bauxite, flake graphite, antioxidant, phenolic resin and so on. Lower nozzles character in good thermal shock resistance, strong erosive corrosion resistance, good rupture resistance and so on.

Item RS-XSK-1 RS-XSK-2 RS-XSK-3 RS-XSK-4 RS-XSK-5
Al2O3 % ≥ 75 55 68 60 65
MgO % ≥ / / / /
C % 6 5 4 4 4
Bulk density g/cm3 ≥ 2.8 2.6 2.7 2.7 2.65
Apparent porosity % ≤ 15 15 15 15 15
Crushing strength Mpa ≥ 60 40 40 40 25

Long nozzle(ladle shroud)

Long nozzle is functional refractory connects ladle and tundish. Long nozzle plays the role of stabilizing steel liquid flow state, avoiding steel liquid oxidization, keeping steel liquid from splashing, etc. RS series high grade roasting-free long nozzle has excellent thermal shock resistance, good steel liquid washout resistance, excellent slag resistance and so on. Besides, RS long nozzles also feature in convenient operation, significant improvement of working condition.

Long nozzle physiochemical indexes

Item RS-CSK-1 RS-CSK-2 RS-CSK-3 RS-CSK-4
RS-CSK-5
Main body Slag line Main body Slag line
Al2O3 % 45 / 45 35 40 50
SiO2 % 20 / 20 25 20 10
C+SiC  % 25 25 25 40 25 25
ZrO2 % / 60 / / / /
Bulk density g/cm3 ≥ 2.3 3 2.3 2 2.25 2.3
Apparent porosity % 20 19 20 19 23 20
Crushing strength Mpa ≥ 22 10 22 10 22 22
Cold modulus of rupture Mpa ≥ 6 4 6 4 6 6
Thermal shock resistance (1100℃, water cooling)/times 5 5 5 5

Submerged entry nozzle

Submerged entry nozzle plays the role of keep steel liquid from air oxidization when it flows from tundish to crystallizer, besides, it also has the function of evenly distributing steel liquid to crystallizer and controlling  steel liquid flow state at crystallizer. RS series submerged nozzle has  good slag corrosion resistance, blocking resistance, long service life, low accident rate and so on.

Submerged entry nozzle physiochemical indexes

Item RS-JSK-1 RS-CSK-2 RS-CSK-3
Main body Slag line Main body Slag line Main body Slag line
Al2O3 % ≥ 40 / 45 / 35 /
SiO2 % ≤ 20 / 15 / 25 /
C+SiC  % ≥25 ≥13 ≥22 ≥13 ≤40 ≤25
ZrO2 % / 70 / 75 / 60
Bulk density g/cm3 ≥ 2.2 3.4 2.3 3.55 2 3
Apparent porosity %≤ 20 19 18 18 19 19
Crushing strength Mpa ≥ 20 20 20 14 10 10
Cold modulus of rupture Mpa ≥ 6 5 8 5 4 4
Thermal shock resistance (1100℃, water cooling)/times 5 5 5

Tundish upper nozzle

Tundish upper nozzle is inserted into well block during using, it can control steel liquid flow rate combined with stopper. RS series tundish upper nozzle has excellent washout resistance, good thermal shock stability, good corrosion resistance and blockage resistance. When matched with RS series integral stopper, tundish continuous casting times can be significantly increased.

Item RS-HBZ-A R RS-HBZ-B
Chemical composition(%) ≥ Al2O3 55 60
ZrO2 5 5
C 3 8
Bulk density g.cm3 ≥ 2.85 2.85
Apparent porosity % ≤ 15 15
Crushing strength Mpa ≥ 60 40

Tundish upper nozzle physiochemical indexes

Item RS-ZSK-1 RS-ZSK-2 RS-ZSK-3
Main body Bowl part Main body Bowl part Main body Bowl part
Al2O3 % ≥ 45 65 45 50 45 /
SiO2 % ≤ 15 10 15 5 15 /
C+SiC % ≥ 22 10 22 ≤20 22 ≤20
MgO % ≥ / / / 15 / 60
Bulk density g/cm3 ≥ 2.3 2.7 2.3 2.3 2.3 2.6
Apparent porosity %≤ 18 16 18 17 18 19
Crushing strength Mpa ≥ 20 25 20 20 20 15
Cold modulus of rupture Mpa ≥ 8 8 8 10 8 5
Thermal shock resistance (1100℃, water cooling)/times ≥5 ≥5 ≥5

Tundish porous upper nozzle

To prevent blockage, traditional tundish upper nozzle and submerged nozzle service life is short. So porous tundish upper nozzle is developed to overcome this shortcoming. According to structure and function, tundish porous upper nozzles are classified into non-fast changing porous upper nozzle and fast changing porous upper nozzle(submerged nozzle can be quickly changed to promise the consistency of casting). Especially porous fast changing upper nozzle can significantly increase tundish life, although the service life of submerged nozzle is relatively low. Currently used slab tundish service life is longer than 10 hours.

Item RS-TZSK-1 RS-TZSK-2 RS-TZSK-3
Main body Bowl part Porous inner lining Main body Bowl part porous inner lining
Al2O3 % ≥ 45 65 55 65 50 50 50
SiO2 % ≤ 25 10 5 10 10 5 10
C+SiC % ≥ 25 10 20 / 22 ≤20 22
MgO % ≥ / / / / / 15 /
Bulk density g/cm3 ≥ 2.2 2.7 2.4 2.3 2.4 2.3 2.4
Apparent porosity %≤ 20 16 25 16 18 17 18
Crushing strength Mpa ≥ 22 25 20 40 20 20 20
Modulus of rupture Mpa ≥ 5 8 5 / 8 10 8
Thermal shock resistance (1100℃, water cooling)/times ≥5 / ≥5

Metering nozzle

Metering nozzles mainly adopt insertion method and, are classified into ordinary metering nozzle and quick changing metering nozzle. The main chemical composition of nozzle core is zirconia, so metering nozzle has high refractoriness, good thermal shock resistance, nice corrosion resistance, washing resistance, small nozzle hole enlargement, long service life and so on. Relying on quick change system, multi-lower nozzles can be replaced during tundish casting, so tundish service is prolonged and casting efficiency is improved.

Regular metering nozzle inner core physiochemical indexes

Item RS-DSK-1 RS-DSK-2 RS-DSK-3 RS-DSK-4 RS-DSK-5 RS-DSK-6
ZrO2+HfO2 ≥ 64 69 79 89 93 94
Bulk density g/cm3 ≥ 3.6 3.7 3.9 4.2 4.3 4.3
Apparent porosity %≤ 23 23 23 23 21 21
Crushing strength Mpa ≥ 80 80 80 80 100 100
Refractoriness ℃ > 1790 1790 1790 1790 1790 1790

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