Alumina-Carbon Bricks

Alumina-carbon (Al₂O₃-C) bricks are used mainly in steel ladles, for the wall working lining, bottom impact pad, slide-gate surround and well-block area. The graphite makes them non-wetting to steel and slag and highly resistant to thermal shock, while the alumina provides refractoriness and erosion resistance through the ladle campaign.

Carbon (5–20% graphite) makes the brick non-wetting, so molten steel and slag do not penetrate the pores. It also dramatically improves thermal shock resistance because graphite conducts heat well and has low expansion. Antioxidants such as metallic aluminium or silicon are added to protect the carbon from oxidation in service.

Match the grade to the duty: standard Al₂O₃-C for the barrel/wall, Al₂O₃-ZrO₂-C for the aggressive slag line, Al₂O₃-SiC-C for added oxidation and slag resistance, and high-strength grades for the bottom impact pad. Shanker Agencies zones the full ladle for you based on steel grade, slag chemistry and campaign target.

They are laid with tight joints (1–2 mm) using carbon-bonded or high-alumina mortar. Because the carbon oxidises above about 400°C in air, dry-out should limit oxidising atmosphere, coke-breeze or controlled reducing heat-up is used where specified. Proper alignment around the slide-gate and well block is essential.

Yes. Shanker Agencies supplies alumina-carbon bricks from TRL Krosaki and other leading manufacturers, zoned to your ladle design, barrel, slag line, metal line and impact pad, with campaign-life optimisation support and matching flow-control refractories.