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Патент USA US2129434

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Sept., 6, 1938.
' 2,129,434
Filed Jan. 25, 1_93'7
Patented Sept. 6, 1938 Y
noon woor. Brow CHAMBER.
Arthur F. Miller, Jackson. Mich., assignor to
Marquette Cement Manufacturing Company, a
corporation of Illinois
Application January 25, 1937, serial No. 122,326
6 Claims.
'I'his invention relates to rock wool manufacture
and more particularly to a blow chamber into
which the mass of -wool material and shot is
In making rock wool from fused rock wool
material, a thin stream of the fused rock is vio
lently disintegrated by a blast of steamer air
forming fibers of rock wool and larger so-called
“shot" particles. 'I‘he shot particles. being larger
10 and heavier, tend tosettle out more rapidly, and
the present chamber is designed to remove as
large a proportion of these as practicable, and at
the same time to produce continuously a uniform
mass or mat of fibrous material.
(ci. 154-27)
horizontal are approximately equal, although in
opposite directions.
The center section 2| of the roof is approxi
mately horizontal and covers approximately
three-sevenths of the conveyor belt 30, which will
be hereinafter described. The third section 22 of
the roof is downwardly inclined at an angle
slightly less than that of section I 9, and covers
about half ofthe remainder of the belt, while sec
tion 23v continues downward at a greater angle 10
covering the remaining portion of the belt 30. y
It will be noticed that this configuration of the
roof directs the incoming gases downwardly to
ward the belt 30 without the provision of any
The invention is illustrated in the drawing. in _ dead air spaces within which eddies can be set
Fig. 1 represents a sectional elevation of the
blow chamber; Fig. 2, a sectional plan view taken
along the line 2-2 in Fig. l; and Fig. 3, a cross
20 section taken at the .point 3 in Fig. 1.
In producing rock wool, rockv wool material is
melted as desired, for example in the cupola (not
up. With light material, such as rock wool, any
substantial eddy will cause material to be heldin
the air until it has reached considerable weight
_after which it will fall regardless of the eddy.
Such falls, however, will produce irregularities in
the mat upon the belt.
The belt I0, which is to receive the wool übers,
is preferably of a foraminous texture and is
mounted upon the rollers 3l, 32,' 33, 34 and 35,
shown) and a thin stream of the molten material
from the cupola is blasted by a jet of steam or air
25 forming fibers and shot which enter the chamber which are driven to rotate the belt in the direc-`
at the entrance I 0, as shown in Fig. 1. An end v tion of the arrow and carry the wool ñbers out of
less belt I I carried by the driven wheels I2 and I3, the chamber at the opposite end from the en-`
is positioned below theventrance and is of such trance III. Beneath the belt are mounted a plu
length as to catch a large portion of the shot rality- of suction chambers 3G, each of which is
30 material and any heavy unblown slag. The provided with an exhaust 3‘I.> The exhaust may
wheels I2 and I3 are so driven as to rotate the feed into a manifold or may be individually con
trolled. In the latter case, it is possible tol obtain
belt in the direction shown by the arrow, carry
ing the heavier material out of the chamber and greater uniformity in the ribbon of rock wool pro- f
into the cinder pit I4. A flexible guard I 5 is posi
' 35 tioned above the belt to restrict the amount of
gas which may leave the chamber around the
belt. A similar guard may be provided below the
belt, if desired.
The belt II is upwardly inclined to provide a
40 baille and may extend into the chamber a con
siderable distance, for example. as much as ten
or twelve feet from the mouth.
Beneath the mouth II) is a‘plate I 6, downwardly
inclined, which extends- out over theïlower por
45 tion of the belt II and is provided with a down
ward extension I‘I upon which the flap I5 is car
ried. The roof I8 of the chamber is built in
several sections to provide a stream-line eil'ect
and to avoid, so far as possible, the setting up of
50 undesirable eddies or currents within the cham
ber. The first section I9 of the roof extends from
the entrance ID to a point 20 roughly above the
end of the belt I I, the angle of the section I9 being
substantially that of the belt. The deviation of
55 the plate I6 and of the roof section I9 from the
duced, by progressively increasing the vacuum in
the direction of movement of the wool material.
The belt 30 is preferably below the baille belt I I.
The area controlled by each chamber is pref
erably small, for example not-substantially more
than four or five feet.
At the exit side of the blow chamber, means are 40
provided for compressing the mineral wool de
posited on the belt 30. This means preferably
comprises a belt 40 on rollers 4I, 42 and 43, the
roller 42 having its axis below a line connecting
the axes of rollers 4I and 43 to provide an out-~
wardly curved portion on the lower side of the
belt, or, if desirable, a fourth roller may be in
serted for this purpose.
Inasmuch as the thickness of material on the
belt increases toward the exit side of the cham
ber, it is preferable to progressively increase the '
vacuum on the suction chambers in the same di
rection, in order to utilize the depositing surface
of the belt to the maximum extent.
Likewise, the shape of the chamber already de
scribed is such as to tend to equalize the velocity
at the front and rear of the belt 30, thereby de
livering substantially uniform amounts of mate
rial to the various portions of the belt, and in
creasing the effectiveness of the depositing area.
In blow chambers now in general use, escape
vents are provided for steam and air entering the
chamber at the low point. The escaping air or
steam carries with it light and ñne parts of rock
10 wool ñbers in amounts suiiicient to cause con->
siderable loss over a long period, and at the same
time the subsequent settling of the material out
side constitutes a nuisance. In the present de
sign this problem is completely solved because the
15 ribbon of material acts as a ñlter body'for such
fine material through which all of the outgoing
gas must pass.
The side walls I8 of the blow chamber are pref
erably substantially vertical or converge slightly
-20 toward the belt, thereby insuring proper settling
The foregoing detailed description has been
given for clearness of understanding only and no
unnecessary limitations should be understood
therefrom, but the appended claims should be
construed as broadly as permissible in view of the
prior art.
I claim:
1. In a rock wool blow chamber; the combina
30 tion of means for blowing molten wool rock into
a chamber, a foraminous conveyor within the
chamber, and a plurality oi' suction means ar
ranged progressively along the conveyor and op
erating therethrough, the suction means being
35 adapted to produce a progressively higher vacuum
in the direction of movement of the conveyor.
2. In a rock wool blow chamber; the combina
tion of means for blowing molten wool rock into
the chamber, a foraminous conveyor within the
40 chamber, and means for subjecting the conveyor
to progressively higher vacuum in the direction
of its movement.
3. The method of blowing rock wool, which
comprises melting wool rock material, disinte
grating a stream of the molten material to pro
duce rock wool ñbers, directing. the formed fibers
into a settling chamber wherein they are per
mitted to settle upon a conveyor, and subjecting
the conveyor to a progressively increasing vac
uum in the direction of its movement.
4. In combination with means for producing
and blowing molten rock wool material, a cham
ber having‘an opening at one end associated with
the means for blowing the rock wool material,
said chamber having substantially vertical side
walls, a foraminous conveyor substantially of the
same width as the chamber longitudinally ar
ranged therein, means for exhausting gas through 10
the conveyor, said chamber having a roof, the
conveyor and the roof of the chamber being posi
tioned to approach each other in the direction of
movement of the conveyor, said conveyor being
adapted to move in a direction away from the in-_ 15
troduced rock wool material.
5. In combination with means for producing
and blowing molten wool rock material to pro
duce rock wool ñbres and shot; a blow chamber
having an entrance and exit, an upwardlyv in» 20
clined conveyor near the entrance of the chamber
adapted to receive shot and move it downwardly
from the chamber, asecond conveyor nearer the
exit of the chamber than the iirst and positioned
below the upper end of the ñrst conveyor, said 25
chamber having substantially vertical side walls,
said second conveyor lhaving substantially the
width of the chamber, and the roof of the con
yveyor being substantially parallel to the first con
veyor throughout its length and approaching the 30
second conveyor substantially throughout its
length, and means beneath said second conveyor
for removing gases from the chamber, said cham
ber being sealed to prevent escape of gases except
through said second conveyor.
6. In combination with means for producing
and blowing molten rock wool material, a cham
ber having an opening at one end associated with
the means for blowing the rock wool material, a
conveyor longitudinally arranged within the
chamber, means for exhausting gas through the 40
conveyor, said exhausting means being substan
tially the only escape for gases from the chamber,
and the chamber have substantially vertical walls
and a roof gradually approaching the conveyor
in the direction of its movement, and said con~
veyor being adapted to move in a direction away
from the introduced rock material.
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