Ceramic radiant tube heated aluminum melter and method of melting aluminium
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United States of America Patent
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Feb 21, 1984
Grant Date -
N/A
app pub date -
Mar 4, 1983
filing date -
Mar 4, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed are a method and apparatus for clean, low loss melting of aluminum using heat transfer by convection and radiation in separate stages. Heat input to a melter stage is provided by silicon carbide tubes into which gas-fueled burners fire so that the tubes radiate heat to a molten aluminum bath. Combustion products exiting the silicon carbide tubes pass through recuperators, preheating burner combustion air. The combustion products then are piped to a preheater stage and formed into jets of hot gases. The jets are directed into convective contact with solid aluminum stock as the stock is transported along a conveyor, preheating the stock to a temperature of about 1,000.degree. F. The solid stock then is fed to the charge zone of the melter stage and melted by contact with the molten bath.
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