Alumina-carbon brick for refining steel ladle walls and its preparation process
By introducing oxide composite powder and silicon carbide-based composite powder into aluminum-carbon bricks, liquid iron is fixed, solving the problem of brick erosion caused by the re-oxidation of liquid iron. This improves the high-temperature flexural strength and thermal shock resistance of aluminum-carbon bricks, extending their service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 大石桥市冠诚耐火材料有限公司
- Filing Date
- 2026-04-28
- Publication Date
- 2026-07-17
AI Technical Summary
During use, the aluminum-carbon bricks used for the walls of refining steel ladles suffer from rapid erosion due to the penetration of ferrous oxide, which reacts with the carbon in the bricks in a carbothermic reduction reaction to produce liquid iron. The liquid iron is then re-oxidized back to ferrous oxide and penetrates deeper, causing the bricks to continuously erode and fail quickly.
Alumina-carbon bricks are prepared using specific components and processes, including tabular corundum aggregate, oxide composite powder, silicon carbide-based composite powder, and lanthanum-hafnium composite oxide nanoparticles. By accelerating the reduction reaction of ferrous oxide on the surface of the brick and fixing liquid iron, deep erosion by ferrous oxide is prevented.
It effectively prevents ferrous oxide from penetrating into the brick body, extends the service life of the brick, improves high-temperature flexural strength and thermal shock resistance, and meets the requirements of long-term high-intensity service.
Smart Images
Figure CN122102665B_ABST