How does a tundish nozzle work with a stopper rod?

The stopper nose seats into the tundish nozzle bore. As the stopper raises and lowers, the gap between stopper and nozzle opens or closes, controlling the steel flow rate into the mould. The two components are matched as a pair — bore and nose geometry must align for a clean seal and accurate flow.

Why do tundish nozzles have zirconia bore inserts?

Aluminium-killed steels deposit alumina inclusions on the nozzle bore, narrowing it (clogging) and disrupting flow. A zirconia insert at the bore resists this build-up and erosion, keeping the bore dimension stable through sequence casting. Argon purging is also used alongside the insert to suppress clogging.

What is a TCM hot-change tundish nozzle?

TCM (tube-change mechanism) systems allow the tundish/submerged nozzle to be changed during casting without stopping the sequence, extending caster runtime. IFGL supplies hot-change tundish nozzle systems alongside standard and zirconia-insert nozzles for billet, bloom and slab casters.

Tundish Nozzles | Continuous Casting | IFGL

PRODUCT OVERVIEW

The tundish nozzle (well nozzle) is the seat against which the monoblock stopper closes, metering steel from the tundish into the mould or submerged entry shroud. Made from isostatically pressed alumina-graphite with optional zirconia bore inserts for anti-clogging, it must hold a precise, erosion-resistant bore through long sequence casts. IFGL supplies standard and hot-change (TCM) tundish nozzle systems.

KEY PROPERTIES

Material

Alumina-Graphite (Al₂O₃-C)

Al₂O₃ Content

45 – 60%

Carbon Content

25 – 35%

Max Service Temp

Up to 1600°C

Bulk Density

2.3 – 2.6 g/cc

Bore Insert

ZrO₂ (anti-clog grades)

APPLICATIONS

Seats stopper to control tundish-to-mould flow

Links to submerged entry shroud (SES/SEN)

Billet & bloom casting

Slab caster steel metering

Anti-clogging bore (zirconia insert)

Long sequence casting

TECHNICAL SPECIFICATIONS

Grade	Al₂O₃	Carbon	Porosity	Bulk Density	Max Temp
Standard TN	45-55%	25-30%	13-18%	2.4 g/cc	1600°C
ZrO₂-Insert TN	50-60%	28-35%	13-17%	2.5 g/cc	1600°C

* Test conditions: IS 1528 (India) / ASTM C-133 / EN 1402. Values are typical — exact data sheets available on request.

AVAILABLE GRADES

Alumina-Graphite TNZirconia-Insert BoreTCM Hot-Change TNUpper / Inner Nozzle

INSTALLATION NOTES

1
Set the nozzle into the tundish well block with matching bedding mortar
2
Verify concentric alignment with the stopper nose for a clean seal
3
Preheat assembly per OEM schedule to avoid thermal shock on first steel
4
Select zirconia-insert bore for aluminium-killed steels prone to clogging

WHY BUY FROM SHANKER AGENCIES

Shanker Agencies supplies IFGL tundish nozzles and hot-change (TCM) systems matched to your stopper and caster, with zirconia-bore options for anti-clogging performance.

PARTNER BRANDS

IFGL

FREQUENTLY ASKED QUESTIONS

A tundish nozzle (well nozzle) is the refractory seat in the tundish bottom against which the monoblock stopper closes. It meters molten steel from the tundish into the mould or submerged entry shroud. Made from isostatically pressed alumina-graphite, often with a zirconia bore insert, it must hold a precise, erosion-resistant bore through long casts.

QUICK INFORMATION

Max Temperature

1600°C

MORE IN FLOW CONTROL

Monoblock Stoppers

Isostatically pressed alumina-graphite stopper rods for precise tundish-to-mould flow control

Well Blocks

High-alumina/alumina-carbon ladle bottom blocks that house the slide-gate inner nozzle

Slide Gate Plates

Sliding mechanism plates controlling molten steel flow from ladle to tundish

Ladle Shrouds

Shield the steel stream from oxidation during ladle-to-tundish transfer

READY TO ORDER OR NEED A SAMPLE?

Our engineers can recommend the exact grade for your application. Sample kits available for trials. No minimum order on standard grades.

Get a Quote Call +91 98999 57888

TUNDISH NOZZLES