Blast Furnace Refractory
Semi-Graphite
C-SiC Block
The Semi-Graphite C-SiC Block is an advanced carbon-silicon carbide composite refractory material engineered for the most demanding thermal and chemical environments in blast furnace operations. Combining the thermal conductivity of semi-Graphite carbon with the abrasion and oxidation resistance of silicon carbide, this product delivers exceptional longevity and structural integrity in high-temperature industrial processes.
W/(m·K) Conductivity
Apparent Porosity
MPa Crush Strength
Silicon Carbide Matrix
Technical Details
Product Information
| Parameter | Unit | Guaranteed Value | Typical Value | |
|---|---|---|---|---|
| True Density ≥ | g/cm³ | 1.90 | 1.90 | |
| Bulk Density ≥ | g/cm³ | 1.58 | 1.62 | |
| Apparent Porosity ≤ | % | 20 | 18 | |
| Modulus of Compression ≥ | MPa | 32 | 38 | |
| Modulus of Rupture ≥ | MPa | 8.0 | 9.0 | |
| Oxidation Rate ≤ | % | 20 | 18 | |
| Permeability ≤ | mDa | 50 | 45 | |
| Iron Erosion ≤ | % | 30 | 28 | |
| Thermal Conductivity ≥ | Room Temperature | W/(m·K) | 6 | 6 |
| 300°C | 9 | 10 | ||
| 600°C | 13 | 14 | ||
| 800°C | 12 | 12 | ||
| Porosity Capacity less than 1μm | % | 30 | 32 | |
| Ash ≤ | % | -- | 7 | |
| Alkali Resistance | Grade | U or LC | U | |
High Thermal Conductivity
The semi-Graphite carbon matrix provides superior thermal conductivity, enabling efficient heat transfer away from the furnace wall and maintaining a protective freeze lining in blast furnace operations.
Alkali & Slag Erosion Resistance
The dense SiC bonding matrix delivers outstanding resistance to alkali attack and slag erosion, protecting the Block structure from the aggressive chemical environment within blast furnace hearths and bellies.
Low Apparent Porosity
Ultra-low porosity structure minimizes infiltration of molten iron, slag, and alkali vapors, significantly extending service life and reducing maintenance downtime in continuous casting and smelting operations.
Excellent Thermal Shock Resistance
The composite carbon-SiC microstructure absorbs thermal stresses during rapid temperature fluctuations, preventing cracking and spalling during furnace startups, shutdowns, and process variations.
Self-Sealing Oxidation Protection
Silicon carbide reacts with oxygen to form a dense SiO₂ protective layer at the Block surface, creating a self-sealing mechanism that inhibits further oxidation and preserves structural integrity at elevated temperatures.
Custom Engineering Support
Available in bespoke dimensions, shapes, and SiC/carbon ratios tailored to specific furnace designs and operating conditions. Full OEM manufacturing and technical consultation services provided.
Semi-Graphite C-SiC Blocks are the preferred refractory solution for the most thermally and chemically demanding zones in metallurgical and high-temperature industrial furnaces, where long campaign life and reliability are critical.
Blast Furnace Hearth & Stack
Lining the hearth, belly, and lower stack zones of large blast furnaces where combined exposure to molten iron, slag, alkali, and extreme heat is most severe.
Non-Ferrous Smelting Furnaces
Copper, zinc, and lead smelting operations requiring refractories with high resistance to non-ferrous slags and chemical attack at sustained high temperatures.
Electric Arc Furnace Lining
Side wall and bottom lining in EAF steelmaking where thermal cycling, arc radiation, and slag attack demand refractories with superior combined properties.
Submerged Arc & Ferroalloy Furnaces
Ferroalloy, ferrosilicon, and manganese alloy production furnaces where highly reducing atmospheres and reactive slags place extreme demands on refractory materials.
Industries Served
Technology
How It Works
The Semi-Graphite C-SiC Block achieves its exceptional performance through a precisely engineered multi-phase microstructure combining Graphite carbon and silicon carbide.
Raw Material Preparation
High-purity semi-Graphite carbon aggregates and premium silicon carbide powders are precisely graded and blended to achieve the optimal particle size distribution.
Mixing & Forming
The blended materials are combined with specialized binders and formed under high pressure to produce a dense, homogeneous green body with minimal void content.
High-Temperature Firing
Controlled firing in a reducing atmosphere at elevated temperatures bonds the SiC and carbon phases, developing the microstructure that delivers superior mechanical and thermal properties.
Quality-Certified Output
Each Block undergoes rigorous dimensional, physical, and chemical testing before dispatch, ensuring every unit meets the specified performance standards for your application.
Get In Touch
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Quote Today
Whether you require standard configurations or fully customized Semi-Graphite C-SiC Blocks for your specific furnace design, our engineering team is ready to assist. Submit your requirements and we'll respond within one business day.
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