Refractories for Aluminum Melting & Casting: Technical Advancement — From “Withstanding Corrosion” to Non‑Wetting & Long Service Life
In the aluminum processing industrial chain, the melting and casting stage is regarded as the “first critical checkpoint” that determines the quality of downstream products. During melting, holding and transfer of aluminum and aluminum alloys, the molten metal temperature generally ranges from 700℃ to 850℃. Although this temperature appears relatively moderate, molten aluminum features high chemical activity and readily reacts with constituents of refractories. Traditional refractories under aluminum melting and casting conditions typically suffer from the following issues: molten aluminum penetrates and corrodes the furnace lining, continuous formation and growth of corundum nodules triggers lining spalling, and frequent furnace shutdowns for slag removal drive up operation and maintenance costs.
