- Time:Jul 29, 2023
High alumina castable is a refractory material mainly composed of high-purity aluminum oxide (Al2O3) particles and a small amount of other auxiliary materials. It has the following characteristics:
1. High-temperature stability: High-alumina castables have excellent high-temperature stability and can maintain structural integrity and physical properties at extremely high temperatures. It can usually withstand high temperature environments above 1500°C, and is suitable for various high-temperature smelting and industrial equipment.
2. Corrosion resistance: High alumina castables exhibit good corrosion resistance when in contact with acidic, alkaline and oxidizing substances. It can resist the corrosion of metal oxides, molten metals and acid-base solutions, and reduce structural damage caused by corrosion.
3. Mechanical strength: High aluminum castables have high mechanical strength and pressure resistance, and can withstand pressure from gravity, thermal expansion and mechanical vibration. This enables it to cope with mechanical stress and deformation in metallurgical equipment, extending its service life.
4. Good thermal shock crack resistance: high alumina castable has good thermal shock crack resistance, that is, it can still maintain its structural integrity under rapid temperature changes. This is due to its low thermal expansion coefficient and excellent thermal shock stability, which allow it to withstand thermal shock due to thermal stress without cracking.
5. Wear resistance: High aluminum castables have high wear resistance and can resist wear caused by factors such as metal flow, particle impact and mechanical wear. This makes it suitable for metallurgical equipment that needs to withstand the impact of granular materials and metals, such as iron nozzles, casting ladles, etc.
6. Low slag cavity rate: high aluminum castable has low slag cavity rate (permeability), which can effectively prevent the penetration of metal liquid and gas. This helps improve the efficiency of the smelting process and product quality, and reduces waste.
In summary, high-alumina castables are widely used in high-temperature equipment and smelting processes in the metallurgical industry due to their high-temperature stability, corrosion resistance, mechanical strength, thermal shock crack resistance, wear resistance, and low slag void rate. Among them, reliable refractory solutions are provided.
