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STATIONARY AND TILTING
CRUCIBLE MELTING FURNACES
For Aluminum, Brass, Bronze, Copper, Gold, Monel Metal, Nickel, Silver
and other Non-Ferrous Metals
Oil or Gas Fuel
O R melting brass and other nonferrous metals in crucibles, with
oil or gas fuel, w e manufacture
three different sizes of Stationary
Crucible Furnaces and four different sizes
of Tilting Crucible Furnaces as listed on
page 4.
v
In the operation of these furnaces the
most important requirement to be met is, of
course, the production of properly melted
metal. O f hardly less importance is the operating cost, which is low because of the
long life of crucible and furnace lining and
the economy of fuel. T h e furnaces are designed to afford ample room for combustion
Fig. 2. BATTERY OF STATIONARY
CRUCIBLE MELTING FURNACES
Grating over firing pit removed to show the arrangement of burners and piping. The flue is in the rear of
the furnaces and the chimney outside of building.
around the base of the crucible, which
assures good melting with hot metal at the
bottom and without blast on the crucible.
Fig. 1. STATIONARY CRUCIBLE
MELTING FURNACE
The stationary furnace, Fig. 1, is of a construction similar to the ordinary coal or
coke-fired crucible furnace. T h e furnace
body consists of a steel shell with cast iron
top and bottom plates, steel angles on the
corners, and is lined with standardfirebrick
and tiles. T h e crucible chamber is covered
with one large and one small circular tile,
each having a steel band around the outside
and a hole through the center. T h e small
tile also has a bale for easy removal, so that
additions m a y be m a d e and stirring conducted through the hole in the large tile
without opening up the entire chamber.
W h e n the charge is ready to pour, both
tiles m a y be s w u n g to one side by an easy
movement of the lever. A tap hole is proCopynghted 1922
. s. ROCKWELL C<
May, 1922
No. 243
vided on the front for the removal of any
metal that m a y be spilled in the furnace.
T h e burner is also located on the front within easy reach of the melter.
None of the ironwork is exposed to injurious heat.
The vent opening is on the back. If the
furnaces are set in a pit. the spent gases
m a y be carried to a chimney as in the usual
practice with coal and coke furnaces (see
Figs. 2, 3 and 4 ) . If operated in single
units, the furnaces m a y be placed above
OIL MAIN [ ((• ) / * ^
MRIN
floor and vented through the cover tiles
without connection to chimney j see Fig. 1). SIDE ELEVATION OF B A T T E R Y O S T A T I O N A R Y MELTING F U R N A C E 5 .
T h e operation of the furnace is not depend- Fig. 3
ent upon chimney draft and is in no w a y
influenced by wind or weather.
covered without loss. There are no ashes
to deal with.
Repairs may be easily and quickly made
in the same manner as for coal or coke Furnaces for larger crucibles can be built
furnaces.
to order.
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Standard crucibles are used—sizes from
20 to 100, according to size of furnace (see
table on page 41. T h e crucible is lifted out
to pour, the same as from a coal or coke
furnace, and there is no transfer of metal to
a ladle or other crucible to convey to the
mould, as from a tilting furnace. If a crucible should break and the metal run into
the chamber, it m a y be tapped out and re-
T h e tilting crucible furnace is m a d e in
single and double-chamber forms, Figs. 5
to 10, the former for 200 and 400 pound
crucibles and the latter for 800 and 1600
pound crucibles.
Each type consists of an elliptical steel
shell with cast iron top and bottom plates.
FLOOR LINE
LONGITUDINAL ELEVATION A N D 5ECTION OF B A T T E R Y OF STATIONARY MELTING
Fig. 4
FURNACES
Fig. 5. SINGLE C H A M B E R TILTING
CRUCIBLE MELTING F U R N A C E
Fig. 6. D O U B L E C H A M B E R TILTING
CRUCIBLE MELTING F U R N A C E
The lining is made up entirely offiretiles.
laid up in inner and outer courses, so that
only the inner course need be renewed when
burned out and the outer courses left undisturbed. The single-chamber furnace is provided with one burner, the double-chamber
furnace with two burners, placed at the top
and discharging downward toward the
bottom of the furnace, producing ample heat
at this point. The spent gases pass upward
around the crucible and are vented at the
top through the cover tile. A hood m a y be
placed above the furnace to carry the spent
gases out of the building.
The cover tilts with the furnace and remains in place while pouring (see Fig. 6),
thus protecting the metal and the melter.
It m a y be lifted, for charging, by the hand
lever as shown in Fig. 9. Thefirealso may
be continued while pouring, if desired. All
or any part of the charge may be poured or
held without chilling. The crucible need
not be removed from the furnace during its
lifetime. Cold air cannot reach it at any time.
There is no blast against the crucible and
the heat at the bottom is ample.
Any metal spilled in the furnace may be
poured from the tap hole in the back without loss.
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Fig. 7. ELEVATION OF SINGLE
C H A M B E R FURNACE IN CROSS
SECTION—SIZES NOS. 1 A N D 2
Fig. 8. PLAN OF SINGLE CHAMBER
FURNACE IN CROSS SECTIONSIZES NOS. 1 A N D 2
CARNEGIE LIBRARY C
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3 1812 04050 8484
Fig. 10. PLAN OF DOUBLE CHAMBER
FURNACE IN CROSS SECTIONSIZES NOS. 3 A N D 4
Fig. 9. ELEVATION OF DOUBLE
CHAMBER FURNACE IN CROSS
SECTION-SIZES NOS. 3 A N D 4
STANDARD SIZES OF
STATIONARY AND TILTING CRUCIBLE MELTING FURNACES
TILTING
STATIONARY
Furnace Number .,
67
'Standard crucible number .. .
Diam. of crucible at top, inside, inches.
68
20 to 40
1
69
50 to 70
2
3
4
80 to 100
8
10
12'.L16
200
400
800
1600
Floor space, inches
34x68
36x70
42x90
44x94
Air pipe connection, inches
2',
3
4
4
i,
\/
i.,
i^
Oil pipe connection at burner, inches
f"
t
t
t
Oil consumption per 1110 pounds metal ....
8 to 16
8 to 16
8to 16
8 to 16
8 to 16
8 to 16
8 to 16
Air pressure required at burner, ounces
120
175
250
200
300
400
600
Air volume required, cubic feet per minute .
2230
2510
3350
2900
3400
5500
5700
Weight lined complete, pounds
800
900
1050
Shipped lined complete
Weight of all ironwork only, pounds
22
27
30
52
56
76
78
Shipping space, cubic feet
Marlev
Marvel
Martyr
M
a
c
a
w
Mallet
Mango
Marrow
Code word for larger crucibles can be built to order.
*Furnaces
Oil pressure M U S T be uniform—5 pounds per square inch or over will do.
iOil required to melt 10H pounds of metal will vary according to kind of metal and the attention and promptness 1 Mth which it is melted i
poured. For ordinary brass mixtures from 2 to 5 gallons is a fair average.
•Air pressure as well as oil or gas pressure must be uniform. State available pressures of each with order.
If gas is used, state kind and at what pressure.
Seven gallons of oil equal 1000 cubic feet of natural gas. Five gallons of oil equal 1000 cubic feet of city gas.
60 to 120
37x28
2
150 to 210
40x32
2V6
240 to 300
45x36
2K
"FURNACE AND FUEL TO SUIT CONDITIONS"—
is our rule governing consideration of new or improvement of existing industrial heating equipment
to suit your needs under your plant conditions.
We make inspection of plant, devise methods of heating and handling material, furnish complete
industrial heating equipment adapted to your particular plant conditions, and guarantee results, using
coal, oil, gas or electricity, as your best interests require.
W. S. ROCKWELL COMPANY
Furnace Engineers and Contractors
50 CHURCH STREET NEW YORK
(Hudson Terminal Bldg.)
Works: Newark, N. J.
Branches: Chicago Cleveland Detroit
Ellsworth Bldg.
British Representative:
No.'243
Engineers' Bldg.
G I B B O N S BROS., Ltd. ,
4
Majestic Bldg.
Dudley, W o r e , England