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Refractory Runner Bricks (Bottom Pouring Hollow Ware)
Henan Jianhong Refractory manufactures high-precision Refractory Runner Bricks designed for the bottom pouring of steel ingots. Our hollow ware system is engineered to transport molten steel from the ladle to the mold with minimal turbulence and zero leakage.
By using high-quality fire clay and high alumina raw materials, our runner bricks provide excellent resistance to molten steel erosion and thermal shock, ensuring “Clean Steel” production by reducing non-metallic inclusions.
- Al2O3≥: 42%~90%
- Refractory temperature (℃): 1250~1850℃
- Bulk Density (g/cm³): 2.3-2.7
- Cold Crushing Strength(MPa)≥: 25-55
- Certification: ISO9001/ISO14001/ISO45001/ISO50001
- Samples: Free Sample Available to Any Country
- Premium custom refractories at factory-direct competitive prices.
- Rapid global delivery backed by 24/7 expert engineering support.
Technical Data Sheet of Refractory Runner Bricks
Available in Standard Fire Clay and High Alumina for demanding applications.
| Parameter | Clay runner brick | High-Alumina runner brick | Mullite runner brick | Corundum-Mullite runner brick |
|---|---|---|---|---|
| Main Material | Clay (Al₂O₃ 30-45%) | High-alumina (Al₂O₃ 50-75%) | Electrofused mullite | Corundum + mullite (≥90% Al₂O₃) |
| Max Temperature | 1700℃ | 1850℃ | 1800℃+ | 1850℃+ (1900℃ short-term) |
| Thermal Shock | ≤300℃ (50+ cycles) | ≤500℃ (30+ cycles) | ≤800℃ (40+ cycles) | ≤1000℃ (50+ cycles) |
| Slag Resistance | Weak (neutral melts) | Moderate (steel slag) | Strong (alkali/fluoride) | Ultra-strong (high MgO/CaO) |
| Bend Strength | ≥15 MPa | 20-25 MPa | 22-28 MPa | ≥30 MPa |
| Thermal Conductivity | 1.2-1.5 W/m·K | 1.0-1.2 W/m·K | 0.8-1.0 W/m·K | 0.6-0.8 W/m·K |
| Inner Wall | Glazed + graphite | Zirconium coating | Dense electrofused layer | Wear-resistant ceramic |
| Key Uses | Casting (≤1500℃) | Steel/glass (1500-1750℃) | Special steel/electronics (1700-1850℃) | Aerospace/nuclear (1800℃+) |
| Advantages | Low cost, easy use | Balanced performance | Better thermal shock, longer life | Extreme temperature/slag resistance |
Precision Ground Joints for Zero Leakage:
Dimensional Tolerance: We control the tolerance within ±1mm (or ±0.5mm depending on your standard) to ensure a perfectly straight runner line.
Leak-Proof Joints: Our tongue-and-groove connections are mechanically pressed and verified to prevent molten steel penetration between bricks.
Refractory Runner Bricks: The Complete Bottom Pouring System (Funnel, Tube, Spider)
We supply the full assembly of gating system refractories shown in our catalog:
Funnel Bricks: The entry point for the molten stream.
Runner/Tube Bricks: Round or square tubes with tongue-and-groove joints.
Center Bricks (Spiders): Distributes the flow to multiple molds.
Tail Bricks: End-of-line stoppers.
Features of Refractory Runner Bricks
1. Thermal Stability：Resists rapid temperature changes without cracking, ensuring safety during the pouring process.
2. Precision Fit：Mechanically pressed with tight tolerances for seamless, leak-free interlocking joints.
3. Corrosion Resistance：High-purity raw materials resist slag attack and molten steel erosion, extending service life.
4. Smooth Flow：Low-friction inner surface prevents turbulence and reduces non-metallic inclusions in the ingot.
Types of JIANHONG Refractory Runner Bricks
We supply the perfect liner material for your ladle and tundish system. Whether you prioritize cost-efficiency or high-purity ‘Clean Steel’ requirements, browse our four core material categories below to find your best match.
Clay Refractory Runner Bricks
A cost-effective choice for medium-temperature applications.
- Core characteristics: Clay is the main raw material ( 40%-45% Al₂O₃), sintered at 1200-1400℃, refractoriness 1300℃-1500℃.
- Benefits: Outstanding thermal shock resistance (≤300°C), easy to install, and costs only 1/3 to 1/2 the price of high-alumina bricks.
- Limitation: Weaker resistance to slag erosion; suitable for neutral or mildly alkaline slag environments.
High Alumina Refractory Runner Bricks
Versatile and reliable for medium to high-temperature applications
- Standard type (65%-75% Al₂O₃): Withstands up to 1700°C, resists various slag systems, ideal for steel casting runners and glass furnace feeders.
- Premium type (Al₂O₃ > 85%): Refractoriness under load ≥1500°C, suitable for demanding areas like ladle slag lines and high-temperature kiln interfaces.
- Key Advantage: Well-balanced performance, more cost-effective than mullite bricks, covers 80% of medium to high-temperature applications (1500–1750°C).
Mullite Refractory Runner Bricks
Top choice for ultra-high-temperature and complex environments.
- Fused mullite base (Al₂O₃ 70%-75%), refractoriness ≥1800°C, offers 30% better thermal shock resistance than high-alumina bricks.
- Low thermal conductivity and dense structure enhance resistance to alkali/fluoride slag erosion by 50%.
- High-end applications: Specialty steel smelting and electronic glass furnaces (1700–1850°C, highly corrosive environments).
Corundum Mullite Refractory Runner Bricks
The ultimate solution for extreme working conditions
- Corundum composite base (Al₂O₃ ≥ 90%), refractoriness ≥ 1850°C, 20% higher slag resistance, withstands extreme high-calcium/magnesium slags.
- Reinforced with corundum aggregate, withstands over 50 rapid thermal cycles, ideal for 1800°C+ nuclear glass solidification and aerospace alloy melting.
Industrial Applications of Jianhong Refractory Runner Bricks
JIANHONG Refractory Runner Bricks are trusted globally not only in steel plants but also in non-ferrous industries:
Steel Industry: Bottom pouring of Carbon Steel, Alloy Steel, and Stainless Steel ingots (Clean Steel Technology).
Copper & Brass Industry: Casting of large Copper Anodes and heavy ingots, ensuring slag-free metal.
Heavy Iron Foundries: Gating systems for massive castings like wind turbine components and machine beds.
Refractory Runner Bricks Packing & Export Logistics
Robust seaworthy wooden pallet packaging with shrink wrap protection ensures zero damage during transit. Efficient container loading and logistics guarantee timely global delivery.
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