MONOBLOCK STOPPERS
Isostatically pressed alumina-graphite stopper rods for precise tundish-to-mould flow control
PRODUCT OVERVIEW
The monoblock stopper (stopper rod) is an isostatically pressed alumina-graphite refractory rod that seats into the tundish nozzle to regulate steel flow into the continuous-casting mould. A ZrO₂-C nose insert resists erosion at the sealing point, and an internal argon line can purge the nose to prevent clogging. Precise stopper control governs mould level stability, vortex prevention and steel cleanliness. IFGL supplies a full range of alumina-graphite and oxygen-purging stoppers.
KEY PROPERTIES
Material
Alumina-Graphite (Al₂O₃-C)
Al₂O₃ Content
45 – 60%
Carbon Content
25 – 35%
Max Service Temp
Up to 1600°C
Bulk Density
2.2 – 2.6 g/cc
Nose Insert
ZrO₂-C (erosion resistant)
APPLICATIONS
TECHNICAL SPECIFICATIONS
| Grade | Al₂O₃ | Carbon | Porosity | Bulk Density | Max Temp |
|---|---|---|---|---|---|
| Standard MBS | 45-55% | 25-30% | 14-18% | 2.3 g/cc | 1600°C |
| ZrO₂-C Nose | 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
INSTALLATION NOTES
- 1
Mount on the stopper-rod mechanism with correct alignment to the tundish well nozzle
- 2
Preheat the tundish and stopper assembly per OEM schedule before casting
- 3
Connect and verify argon purging line where fitted (anti-clogging)
- 4
Match stopper nose to the tundish nozzle bore for a clean seal and accurate flow control
WHY BUY FROM SHANKER AGENCIES
Shanker Agencies supplies IFGL monoblock stoppers matched to your tundish well nozzle and caster type, including argon-purging designs for anti-clogging on aluminium-killed steels.
PARTNER BRANDS
FREQUENTLY ASKED QUESTIONS
A monoblock stopper (or stopper rod) is an isostatically pressed alumina-graphite refractory rod used in continuous casting. It seats into the tundish nozzle and moves up and down to regulate the flow of molten steel into the mould. A zirconia-carbon nose insert resists erosion at the sealing point for accurate, stable flow control.
QUICK INFORMATION
Max Temperature
1600°C
Category
Flow Control
Grades Available
4 Standard Grades
Industries Served
Brands We Supply
• IFGL
📦 Quick Delivery
Standard grades in stock — Delhi warehouse. Pan-India delivery in 2–5 days. Same-day dispatch for urgent orders ≤ 2 MT.
MORE IN FLOW CONTROL
Tundish Nozzles
Alumina-graphite tundish nozzles that seat the stopper and meter steel into the mould
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.