Strip floater furnace with closed loop recirculation
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United States of America Patent
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-
Jun 17, 1997
Grant Date -
N/A
app pub date -
Mar 25, 1996
filing date -
Mar 25, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A strip floater, heat treat furnace is provided with a plenum housing defining a plenum chamber which is positioned within a refractory lined furnace enclosure. The plenum chamber contains i) a fan housing holding a recirculation fan, ii) a header and pressure pad arrangement for heating and floating strip passing through the furnace, and iii) a recirculation duct for collecting and refreshing spent furnace atmosphere. The entire furnace atmosphere circulation loop from the fan housing through the header and pressure pads and back to the fan housing from the return duct after strip impingement is thus closed and sealed thereby preventing refractory fibre and foreign matter entrainment in the gas streams impinging the strip while improving the temperature control of the furnace atmosphere and strip.
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