Waste Heat Recuperation for Aluminum Furnaces

摘要

The report covers the effort in a one year program in advancing recuperation technologies suitable for the aluminum industry. The program included a survey of industry processes and industry interest in recuperation; performed comprehensive evaluations of candidate recuperator materials; and explored possible designs of prototype recuperators that would be suitable for this challenging environment. A materials test chamber was constructed and installed on an aluminum reclamation furnace. Six stainless steels, seven superalloys, and eight ceramic materials were exposed to the furnace stack environment and furnace duty cycle at material temperatures ranging from 1000F to stack temperature (2100F) for up to 2500 hours. Exposed materials were analyzed for corrosion, recession, and levels and type of attack from the environment.