Instructional Manual For Clarification Of Startup In Source Categories Affected By New Source Performance Standards - U.s. Environmental Protection Agency - 1979 Page 63
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146 industry due to economic and environmental reasons and increased reliance on
large scrap dealers who will clean and process raw scrap.
Air pollution con-
trol devices, typically baghouses, must be operated to insure proper installa-
tion and structural integrity of all ductwork, housings and supports.
Finally,
the furnace(s) must be inspected for proper refractory installation (all units),
freedom of rotation (rotary units, tilting reverberatory and electrical units)
and correct charging clearances.
Pretreatment (curing) of furnace refractory
is crtional and left to the discretion of the plant operator.
When practiced,
curing typically takes 2 to 3 days.
.Electric induction furnace equipment'
(transformers, rectifiers, etc.) is also energized prior to startup.
Complete
checkout of this equipment necessarily requires actual plant startup.
Plant
construction typically takes 6-12 months, and individual pre-startup checks
will be performed immediately after the specific piece of equipment is installed.
Startup Operations
Startup of a new or modified brass and bronze ingot production facility is
the first day metal .is charged into the furnace and melting begins.
Application
of heat, either directly or indirectly, will cause generation of metallic fumes,
which are the pollutant of concern.
This startup date can be obtained by check-
ing plant production records.
Immediately prior to metal charging and light-off,
the collection equipment is
a~tivated
to insure particulate emissions are con-
trolled at all times.
When baghouses are used, activation may also include in-
jecting lime into the flue gas stream to neutralize acids and prolong bag life.
As
the operation of conventional design furnaces is straightforward, most op-
erators will fully charge the unit with scrap and attempt to reach maximum
production as soon as possible.
Under these conditions mechanical and electri-
cal problems will appear and be corrected immediately.
Furnaces with new designs,
although infrequently installed, will require a slower break-in period to insure
all metallurgical conditions are correct and the furnace is operating as designed.
Regardless of furnace type, industry contacts indicated that the l80-daytest
time frame could be met by all plants. '
51
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