Overview
Carbon bricks are refractory materials made predominantly from carbon, often with added binders like pitch or resin. They are engineered to withstand extreme temperatures (up to 3000°C) and aggressive chemical environments. Their primary use is in industrial settings where thermal and chemical stability are critical, such as in the linings of blast furnaces for iron smelting or electrolytic cells for aluminum production. These bricks are valued for their longevity and efficiency in high-heat applications. Unlike traditional ceramic refractories, carbon bricks do not soften or degrade under thermal cycling, making them indispensable in metallurgy and chemical processing industries.
Physical and Chemical Properties
Carbon bricks exhibit exceptional thermal conductivity, which allows for efficient heat distribution in industrial furnaces. Their low thermal expansion coefficient minimizes structural stress during temperature fluctuations. Chemically, they are inert to most acids, alkalis, and molten metals, though they may oxidize at very high temperatures in the presence of oxygen. The mechanical strength of carbon bricks is another key attribute, with compressive strengths typically ranging from 20 to 50 MPa. Density varies based on manufacturing methods, with higher-density bricks offering better corrosion resistance but reduced insulation properties. Grades are often classified by ash content, with premium bricks containing less than 5% ash.
Main Applications
The metallurgical industry is the largest consumer of carbon bricks, particularly in blast furnaces where they line the hearth and bottom zones. Their resistance to molten iron and slag erosion extends furnace lifespan. In aluminum production, carbon bricks serve as cathodes in electrolytic cells due to their electrical conductivity and chemical stability. Chemical plants utilize carbon bricks in reactors handling corrosive substances like phosphoric acid or chlorine. Emerging applications include incinerators and nuclear reactors, where their radiation resistance and thermal properties are advantageous. Specialty grades are also used in aerospace components.
Safety and Storage
While carbon bricks are non-toxic, their handling generates fine dust that requires respiratory protection. Work areas should be well-ventilated, and dust suppression measures like wet cutting are recommended. Prolonged skin contact with raw materials (e.g., pitch-bound bricks) may cause irritation. Storage requires protection from moisture to prevent binder degradation. Bricks should be stacked on pallets in covered warehouses, separated from oxidizers. Fire risk is minimal due to carbon's high ignition temperature, but combustible binders in some grades necessitate general fire safety protocols.
B2B Procurement Guide
When sourcing carbon bricks, prioritize suppliers with ISO 9001 certification and industry-specific experience. Key specifications to verify include ash content (lower for corrosive environments), compressive strength (minimum 25 MPa for furnace linings), and thermal conductivity (typically 10–50 W/m·K). Bulk purchases (20+ tons) often qualify for 10–15% discounts. Lead times vary from 4–12 weeks depending on customization. Consider regional logistics; domestic suppliers may offer faster delivery but at a 5–10% premium over imports. Always request samples for pre-installation testing under operational conditions.
Related Manufacturers
- 主营：国标改质沥青、改制煤沥青、改质沥青、碳砖碳块兰炭专用、国标中温沥青、中温煤沥青、中温沥青出口、改质沥青出口、煤沥青、煤沥青厂家、煤沥青出口、预焙阳极用沥青、无水焦油、沥青粉、高温煤沥青、球沥青、沥青片、改质沥青厂家、高温沥青块、中温沥青块、液体沥青
- 主营：煤沥青、改质沥青、中温沥青、高温沥青、球沥青、沥青粉、树脂沥青片、石油沥青、固体 液体、炭黑油、国标煤沥青、煤焦油沥青
- 主营：高铝砖、刚玉砖、浇注料、预焙碳砖、耐火泥、耐火水泥、保温砖、粘土砖、陶瓷蓄热体、耐火球、陶瓷纤维产品、耐火材料、保温材料
- 主营：国标改质沥青、国标中温沥青、高温沥青粉、石油沥青片、煤沥青片、燃料油、高温煤焦油、蒽油、高温颗粒、高温块、石油沥青
- 主营：改质煤沥青、高温煤沥青、中温煤沥青、低温煤沥青、国标改质沥青、国标中温沥青、沥青粉、树脂片沥青、石油片沥青、液体沥青、固体沥青、煤沥青
- 主营：改质沥青、国标中温沥青、球沥青、沥青粉、片沥青、石油沥青
- 主营：臭氧催化剂、臭氧催化填料
- 主营：布袋除尘器、滤筒除尘器、活性炭吸附箱、防水碳、pp喷淋塔、气旋混动塔、rc催化燃烧装置、低温等离子净化器、多管油烟净化器、光氧活性炭一体机、等离子光氧一体机、焊烟净化器、uv光氧净化器、微波光氧净化器、水雾分离器、环保箱、生物除臭箱、旋风除尘器、螺旋输送机、离心风机、厨房油烟净化器、管道配件、除尘骨架、除尘滤袋
- 主营：生物菌种、cod专用菌、硝化细菌、复合碳源、除磷剂、絮凝剂、石灰粉、活性炭、果壳炭、柱状炭、cod去除剂、河道黑、酰胺msds、净水滤芯、氢氧化钠、片碱纯碱、专用纯碱、硫酸亚铁、椰壳颗粒、煤质颗粒、碘值滤芯、印染电镀、活性污泥、生化系统、酰胺电泳
- 主营：聚丙烯酰胺
- 主营：国标改质沥青、高温国标改质煤、石油沥青、镁碳砖、高温沥青、聚酯沥青、球沥青、煤沥青、沥青粉、高温煤焦油、炭黑油、洗油、蒽油、国标中温沥青
- 主营：聚合氯化铝、聚丙烯酰胺、蜂窝活性炭、椰壳活性炭、石英砂、锰砂滤料、无烟煤滤料、纤维球、蜂窝斜管、ABS滤帽、不锈钢滤帽
- 主营：高温沥青、改质沥青、煤沥青片、石油沥青片、中温沥青、沥青粉、烧火油、高温煤焦油、蒽油、炭黑油
- 主营：工业铸造钢、国标改质沥青、球状沥青、焦粉筛分、定制沥青粉
- 主营：中温沥青、高温沥青、改质沥青、沥青粉、沥青片、煤沥青