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The G&P
patented Reverse Flow concept has been successfully used with Side
Well Melters in conjunction with dry hearth melting for facilities
that have significant quantities of heavy scrap and lesser
quantities of lightweight material that is suitable for charging
into an open well. The
Reverse Flow Melter provides a scheme to effectively use the flue
gas discharge from the main hearth to preheat the sows while
contaminated scrap is being charged in the open well.
The open side well is hooded and discharges the emissions
into a reactor chamber that is common to the two flues of the
reversing system.
The Reverse Flow Melter was designed and patented by Gillespie
+ Powers, Inc. for major aluminum facilities whose overall furnace charge
consist of a significant quantity of heavy scrap and less
quantities of oily foil scrap or light material, suitable for
charging into an open well.
The Reverse Flow Melter provides a scheme to effectively use
the flue gas discharge from the main hearth to preheat the sows
while contaminated scrap is being melted in the open side well.
The open side well is hooded and discharges the emissions into a
reactor chamber that is common to the two flues of the reversing
system.
Following the completion of the preheat cycle, the sows are
flash melted after reversing of the dampers, with the flue gas
discharge passing into and across the length of the main hearth.
Following reload of new sows, the dampers are again reversed and
the process repeated.
The main hearth roof-burners are operated in a cascade fashion
using three two-burner control zones. A fully automated process
control system provides for optimum efficiency in all operating
modes.
The orientation of the ramps and interconnecting metal eyes in
the external open well were carefully positioned and sized to
effectively use the thermal capacity in the main hearth.
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| Reverse Flow Melter on
Round Top Charge Furnace |
This system allows for effective melting of a full range of
sows and contaminated scrap on a completely automated basis, with
total incineration and the elimination of fugitive emissions.
The reverse flow concept can be applied to any other melting
operation where large quantities of heavy scrap are to be
preheated and melted. It is especially efficient when used for
sow preheat followed by flash melting.
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