Patent ID: 6890479

Claim:
A metallurgical furnace comprising: a furnace shell having a hearth, a side wall above said hearth, and a roof at the top thereof; a heating means for heating the interior of the shell to temperatures in the range of about 2000° F. to 4000° F.; an exhaust system attached to said furnace shell, said system having an opening and at least one fume duct; an off gas chamber connected to said furnace shell by said fume duct of said exhaust system; and a plurality of pipes, plates or a combination thereof disposed throughout the furnace shell and the exhaust system for cooling the furnace during operation, wherein said fume duct and said plurality of pipes are comprised at least of an aluminum-bronze alloy, where the alloy has iron and tin having a combined weight percent that is at least 2.5% of the total weight of the alloy.