Email
Get PriceCarbon bricks are high-performance refractory materials made from anthracite, coke, and graphite, designed for molten metal, slag, and high-temperature environments. They are widely used in blast furnace hearths, electric furnaces, and chemical equipment, offering low permeability and high thermal conductivity for extended service life.
Fixed Carbon (≥)
Bulk Density (g/cm³)
Compressive Strength (MPa)
Thermal Conductivity (W/m·K)
Carbon brick is a carbon-based refractory material made from anthracite, coke, or graphite with specialized binders. It is widely used in blast furnace hearths, electric furnaces, and chemical equipment due to its ability to withstand high temperatures and aggressive environments.
Compared with traditional refractory bricks, carbon bricks feature low wettability to molten metal, high thermal conductivity, and strong resistance to thermal shock, helping to reduce metal penetration and extend service life.
Depending on the application, carbon bricks can be used for both metallurgical processes (molten iron and slag contact) and corrosion-resistant linings in chemical industries, making them a versatile solution for demanding conditions.
| Property | Ordinary Carbon | Semi-Graphite | Graphite | Microporous | Impregnated |
|---|---|---|---|---|---|
| Bulk Density (g/cm³) | 1.55–1.65 | 1.60–1.70 | 1.65–1.80 | 1.60–1.75 | 1.65–1.75 |
| Apparent Porosity (%) | 15–20 | 10–18 | 8–15 | ≤10 (as low as ≤5) | 5–12 |
| Cold Crushing Strength (MPa) | 30–50 | 40–60 | 50–80 | 35–60 | 50–80 |
| Carbon Content (%) | 80–88 | 88–93 | 93–99 | 90–98 | 85–95 |
| Ash Content (%) | 5–10 | 3–8 | 1–5 | ≤5 | ≤5 |
| Thermal Conductivity (W/m·K) | 3–8 | 5–12 | 10–25 | 6–15 | 5–10 |
| Permeability | High | Medium | Low | Extremely Low | Very Low |
Carbon bricks can be broadly divided into two major application systems based on working conditions. Each system has different performance priorities, material structures, and typical applications.
Designed for extreme high-temperature environments with molten metal and slag, this system focuses on thermal performance, erosion resistance, and structural stability.
☑ Ideal for chemical industries where corrosion resistance is more critical than high temperature strength.
Engineered for chemical corrosion environments, this system emphasizes chemical stability, impermeability, and long-term durability in acidic or alkaline conditions.
| Aspect | Metallurgical Carbon Brick | Corrosion Resistant Carbon Brick |
| Main Environment | Molten metal & slag | Acid / alkali chemicals |
| Core Function | Anti-penetration & heat transfer | Anti-corrosion & impermeability |
| Thermal Conductivity | High | Medium |
| Chemical Resistance | Medium | Very High |
| Typical Industry | Steel / metallurgy | Chemical / petrochemical |
| Installation | Dry laying / ramming | With carbon paste or resin |
Proper installation and matching materials are essential to ensure the performance and service life of carbon bricks, especially in blast furnace and chemical corrosion environments.
Installation Methods：
Recommended Supporting Materials:
One-Stop Supply Solution:
Kerui Refractory provides not only carbon bricks, but also complete supporting materials and system solutions, including:
☑ Helping you achieve faster installation, better sealing performance, and longer service life with a single-source supply.