Al2O3‑SiC‑C Composite Brick Impact Pad
Al2O3‑SiC‑C Composite Brick Impact Pad is a complex, monolithic refractory made from a high-performance matrix of ALUMINA (Al2O3), SILICON CARBIDE (SiC), and CARBON (C) (usually graphite or carbon black), often reinforced with anti-oxidation additives and metallic powders.
| COMPONENT | FUNCTION | ADVANTAGE GAINED |
| ALUMINA (Al2O3) | Hot Strength / Refractoriness | Provides structural integrity at high temperatures. |
| SILICON CARBIDE (SiC) | Thermal Conductivity / Wear | Increases thermal shock resistance and abrasion resistance. |
| CARBON (C) | Non-Wetting / Thermal Shock | Prevents wetting by molten metal and provides excellent thermal shock resistance. |
Key Properties and Performance
| PROPERTY | TYPICAL PERFORMANCE | MECHANISM OF ADVANTAGE |
| Thermal Shock Resistance | EXCELLENT | High thermal conductivity of SiC and high elasticity of C dissipate stress quickly. |
| Erosion/Impact Resistance | EXCELLENT | High hardness of Al2O3 and SiC resists the kinetic energy of the pouring stream. |
| Non-Wetting | EXCELLENT | CARBON minimizes contact and reaction with molten steel/slag, preventing penetration. |
| Service Life | OPTIMIZED | Designed to survive the severe localized stresses of multiple heats. |
Al2O3‑SiC‑C Composite Brick Impact Pad
Advantages and Key Characteristics
The Al2O3- SiC-C Impact Pad is a specialized, sacrificial component engineered to absorb the most severe operational stress in molten metal handling systems.
- Impact and Abrasion Absorption: The dense, multi-phase composite structure is specifically formulated to resist the intense physical energy and scouring action of the high-velocity stream of molten steel poured from a ladle or transfer vessel.
- Thermal Shock Resilience: The rapid temperature increase experienced when the molten metal hits the cold base of the vessel is mitigated by the low thermal expansion of carbon and the high thermal diffusivity of SiC.
- Slag and Metal Non-Wetting: The carbon/graphite component is highly non-wetting to molten steel and slag, which prevents corrosion and chemical infiltration, protecting the main lining underneath.
- Refined Chemistry: The composite structure provides a clean surface, minimizing contamination of high-grade steel, which is critical in ladle metallurgy.
Typical Industries and Applications
Impact Pads are essential components in all major steel and high-grade metal production facilities:
- Ferrous Industry (Steel): Tundish, Ladle, and other transfer vessel bottoms.
- Non-Ferrous Industry: Specialized pouring zones for high-value alloys.
Furnace Areas and Service Zones
Impact Pads are placed directly at the location where molten metal enters the vessel:
- TUNDISH IMPACT ZONE (Well Block): The most common application, placed on the floor of the tundish directly beneath the ladle shroud to absorb the initial kinetic energy of the steel stream.
- STEEL LADLE BOTTOM: Used in the center of the ladle bottom to protect the working lining during the initial tapping phase.
Key Data Sheet Properties to Consider
Performance is measured by wear and physical properties:
- Bulk Density (BD): Must be high (e.g., > 2.8g/cm3) to maximize resistance to mechanical erosion.
- Apparent Porosity (AP): Should be low to minimize slag/metal penetration.
- Cold Crushing Strength (CCS): Must be high to withstand the mechanical stresses during installation and service.
- $\text{SiC}$ and Carbon Content: The specific ratio determines the balance between thermal shock resistance (SiC/C) and hot strength (Al2O3).
Technical Guidance: Impact pads are a wear part that should be monitored and replaced regularly. Their life is measured in the number of heats survived, not campaign duration. When specifying, consider the height of the metal free fall (which dictates impact energy) and the number of consecutive heats expected. They are bonded with high-performance, Al2O3-C or similar mortars to the surrounding permanent lining.
✨ Customization Services
We offer product customization services, allowing you to tailor the appearance, dimensions, or specific markings of items like refractory shapes or bricks. This includes options for incorporating specific geometric requirements to ensure seamless integration into your process systems.
🔬 Sampling for Testing & Validation
Free product samples are available for thorough testing and validation. This allows you to confirm the quality, compatibility, and performance of our materials—such as specific bricks, castables, or raw materials—before committing to a full order.
💡 Expertise in Refractory Solutions
Leverage our deep expertise to receive detailed, application-specific refractory solutions. We move beyond just selling products by providing comprehensive plans that encompass material selection, installation guidance, and performance optimization to maximize the lifespan and efficiency of your high-temperature processes.
Rabatec products are exclusively manufactured in facilities that have achieved rigorous ISO certifications across Quality (ISO 9001), Environmental Management, and Occupational Health & Safety. This commitment ensures every product, from refractory bricks to specialized equipment, meets the highest global benchmarks for performance, sustainability, and workplace safety.
📦 Logistics Excellence: Shipping, Packaging, and Marking
Minimizing Risk: We manage all logistics to minimize handling touchpoints and transit shock. Our carriers are pre-vetted for their experience in transporting heavy, fragile, and sensitive industrial materials.
Traceability: Every shipment includes comprehensive documentation and tracking information, providing end-to-end visibility and ensuring precise delivery coordination for your site.
Protection is Paramount: Our packaging strictly follows industry standards to prevent damage, corner chipping, and moisture absorption—especially critical for materials like Basic Refractory Bricks and Refractory Mortars & Mixes.
Robust Palletization: Products are secured on fumigated, high-strength export pallets (e.g., 1100x950mm or similar sturdy dimensions) using heavy-duty strapping and durable protective wrapping (polyethylene sheeting, cardboard, etc.) to withstand long-distance travel and multiple loadings.
Moisture Control: Sensitive materials are protected with appropriate sealing and, where necessary, desiccants or moisture-vapor proof enclosures to maintain the product's integrity until installation.
Clear Identification: All outer packaging is clearly marked on multiple sides with large, legible text for immediate identification and safe handling.
Full Traceability: Markings include all essential data points: Product Name, Quality Grade, Batch Number, Quantity, Net/Gross Weight, Order Number, and the Final Destination/Construction Area. This ensures every pallet can be accounted for and correctly staged upon arrival.
Safety & Compliance: We adhere to all regulatory requirements for marking, labeling, and placarding—especially for any items classified as Dangerous Goods—to ensure full compliance with international and domestic transport regulations.
❓ Frequently Asked Questions (FAQ)
Question | Elaborated Answer |
Q: What is the Refractoriness Under Load (RUL) of your refractories? | A: Refractoriness Under Load (RUL) is a critical property that defines the maximum temperature our materials can withstand while under compressive stress before deforming (softening). Since we offer a wide range of materials—from Alumina-Silicate Bricks to high-performance Silicon Carbide Bricks—the RUL varies significantly. For specific product data, please refer to the product data sheet or submit a quote request for the material you are interested in. |
Q: Where are the Rabatec refractories and materials produced? | A: Our products are primarily sourced from specialized manufacturing plants in China. Crucially, these facilities have all undergone rigorous audits and achieved comprehensive ISO certifications (Quality, Environment, and Safety), ensuring that production adheres to the highest global standards for consistency and performance. |
Q: What refractory materials does the company offer? | A: We supply a comprehensive portfolio of advanced refractory solutions, including: Shaped Products: Alumina & Silica Bricks, Basic & Specialized Bricks (e.g., Magnesia), SiC & Structural Ceramics, and Precast Shapes. Monolithic Products: Refractory Castables, Mixes & Mortars. Insulation: Insulation Fibre and High-Performance Insulation Products. |
Q: How should I choose the appropriate refractory material for my application? | A: Selecting the correct refractory is paramount to process efficiency. The choice depends on three key factors: 1. Operating Environment: Maximum process temperature and thermal cycling (shock). 2. Chemical Attack: Type of slag, molten metal, or corrosive gas being handled (acidic, neutral, or basic). 3. Mechanical Stress: Abrasion, erosion, and static load requirements. We recommend utilizing our detailed refractory solutions service to consult with our engineers for an optimized, application-specific recommendation. |
Q: Which monolithic material should I choose when patching an existing lining? | A: For patching and minor repairs, the ideal monolithic material depends on the parent lining material, the patching depth, and the need for a rapid return to service. Common choices include: Refractory Mortars & Mixes (for minor joints/surfaces) or Plastic Refractories (for areas requiring physical compaction). Always choose a patch material chemically compatible with the existing lining to ensure proper bonding and service life. |
Q: Can I receive product samples before placing a major order? | A: Yes. We gladly provide product samples for your internal testing and validation purposes. This ensures you can confirm the quality, composition, and fit of the material—such as our Refractory Castables or Alumina-Silicate Bricks—in your specific operational environment before committing to a bulk purchase. |
Q: Do you provide certifications to verify material quality? | A: Absolutely. We provide product-related inspection certificates and quality assurance documentation upon request. This verifies that your order has passed all internal quality control checks and meets the required material specifications and industry standards. |
Q: What measures are taken for product protection during transport? | A: We ensure quick, reliable transport by using robust, industrial packaging that strictly follows industry standards. This includes high-strength palletization, heavy-duty strapping, and weather-resistant wrapping to protect fragile items like bricks and mixes from corner chipping, mechanical damage, and moisture during transit. |
