Rotary Kiln Process for Producing Sodium Aluminate from Aluminum Dross and the Application of Refractory Materials
The process of producing sodium aluminate using aluminum dross as the primary raw material, with its advantages of high solid waste utilization and high product value-added, not only alleviates the environmental pressure caused by the stockpiling of aluminum dross but also provides a low-cost source of aluminum for sectors such as water treatment, building materials, and chemicals. It has gradually become a popular technological approach within the industry.The inherent components of aluminum dross, combined with the complex elements—such as alkali, sulfur, chlorine, and fluorine—generated by the combustion of limestone, soda ash, and pulverized coal used as raw materials, subject the refractory materials to severe chemical erosion and thermomechanical stress.This paper analyzes the sodium metasilicate production process from aluminum dross, rotary kiln operating conditions, and the mechanisms of refractory damage to explore refractory material configuration schemes that ensure stable and long-term kiln operation.
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