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Патент USA US3095996

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July 2, 1963
F. .J. SINES
3,095,986
BLAST FURNACE TOPS
Filed Nov. 4. 1960
4 Sheets-Sheet 1
“Z25
M/Ef M13»
ATTORNEY‘
July 2, 1963
F. J. SINES
3,095,986
BLAST FURNACE TOPS
Filed Nov. 4, 1960
4 Sheets-Sheet 2
INVEN TOR.
FRANCIS J. S/N?S‘
ATTORNEY
July 2, 1963
F. J. SINES
3,095,986
BLAST FURNACE TOPS
Filed Nov. 4, 1960
4 Sheets-Sheet 3
0C POM/5Q
P15’. 4
INVENTOR.
FIQl/VC/S J. SIA/E?
A 7' TORNEY
July 2, 1963
3,095,986
F. J. SINES
BLAST FURNACE TOPS
Filed Nov. 4, 1960
4 Sheets-Sheet 4
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INVENTOR.
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ATTORNEY
United States Patent 0
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3,095,986
Patented July 2, 1963
1
2
3,095,986
manner to be described hereinafter. The shell 2 also has
an opening 12 through which the exhaust gases pass to a
Francis J. Sines, Youngstown, Ohio, assignor to United
conventional downcomer 14, and an opening 16 through
which dust particles pass to a dust pipe 18. A cylindrical
BLAST FURNACE TOPS
States Steel Corporation, a corporation of New Jersey
Filed Nov. 4, 1960, Ser. No. 67,386
9 Claims. (Cl. 2l4—35)
uptake 20 is supported concentrically within the shell 2.
The inner surface of the uptake 20 is lined with refrac
tory material 22. The uptake 20 is provided with open
This invention. relates to blast furnace tops and more
ings 24 for the release of the exhaust gases. In the annu
lar space between the shell 2 and the uptake 20 is a slanted
Among the functions which a blast furnace top must per 10 distributor chute 26 formed by an upper elliptical mem
form are the sealing of blast furnace gases so that they
ber 28 and a lower elliptical member 30. The chute 26
cannot escape into the atmosphere and the distributing
extends through the opening 10 and is provided with a
particularly to charging equipment for blast furnace tops.
of the charge uniformly over the stockline in the stack
of the furnace. At present, these functions are performed
by the well-known bell and hopper structure. That struc
ture has certain disadvantages, however. The bells are
dividing structure 32 (FIGURE 2) which is located in
the path of flow of the raw materials to divide the charge
equally between the two sides of the chute 26. The lower
member 30 of the chute 26 is provided with four open
ings 34, 36, 38 and 40 through which the raw materials
are discharged. An auxiliary chute 42 is located below
the opening 34 and has openings 43 and 44 therein, the
latter of which is diametrically opposite opening 38. An
auxiliary chute 46 is located below the opening 40 and
has openings 47 and 48 therein, the latter of which is
diametrically opposite opening 36. The side walls of the
chutes 26, 42. and 46 are formed by the shell 2 and the
uptake 20. A door 50 associated with openings 34 and
large and expensive and require complex equipment for
their operation. Also, the construction is such that the
sealing surfaces are subject to abrasion from the blast
furnace gas. Because these bells must be located over
the center of the column, the gas from the furnace must
be removed by upstakes which are placed at the periphery
of the furnace. The cross-sectional area of these up
takes is therefore limited with the result that the gases
must be transmitted at such a high velocity that large
dust particles are carried through the uptakes. Thus, be
fore the gas is used, the dust must be removed by large
and expensive dust catchers. My invention alleviates these
43 is attached to a shaft 52 which is rotated through a
gear 54 and a pinion 56 attached to the shaft of a motor
58. In like manner, a door 60 associated with openings
disadvantages by eliminating the bells and hoppers and
40 and 47 is attached to a shaft 62 which is rotated
by placing the uptake above the center of the furnace 30 through a gear 64 and a pinion 66 attached to the shaft
so that its area may be greatly increased. For example,
of motor 68. At the top of the chute 26 and exterior
I have found that I can triple the uptake area and thereby
to the shell 2 is a housing 70 in which a charging hop
decrease the velocity of the gas to 1/3 its former value.
Because the diameter of the largest sized airborne particle
varies approximately with the square of the gas velocity,
per 72 is arranged to rotate. The charging hopper 72,
having a counterweight 73, is attached to a shaft 74
which is rotated through a gear 76 driven by a pinion
a reduction of the velocity to 1/3 its former value causes
78 mounted on the shaft of a motor 80.
a reduction in the diameter of the maximum sized particle
ings 81 are mounted on the outside of hopper 72. Sup
ported on the housing 70 are doors 82 and 84 (FIG
URE 3) which are attached to and rotate with shafts
86 and 88, respectively. C-ounterweights 90 and 92 are
mounted on shafts 86 and 88, respectively. The counter
weights 90 and 92 are of such weight and are so posi
tioned that the doors 82 and 84 are normally biased to
to 1,4, its former value. Thus, the dust catcher may be
eliminated and the gas washing facilities reduced in size.
Therefore, it is an object of my invention to provide a
an improved blast furnace top which eliminates the usual
bell and hopper arrangement and the complicated mecha
nism necessary for its operation.
Another object is to provide a blast furnace top which
has an uptake of su?iciently large area to reduce the
size of dust particles which are carried out of the furnace
with the blast furnace gases.
These and other objects will be more apparent after
referring to the following speci?cation and attached draw
closed position. A ?ange 94 is attached to the housing
* 70 and is adapted to provide a gas tight seal with door
82 when it is in its closed position. A ?ange 96 is simi_
larly attached to the housing 70 to provide a gas tight
seal with door 84. A skip bridge 98 and skip car 100
are provided for carrying the charge up to the hopper
72. The skip car 100 is provided with an arm 102 (FIG
URE 4) which is preferably made of a flexible material.
A relay 104 having a normally open contact 104C and
ing, in which:
FIGURE 1 is a vertical cross section view of a blast
furnace top made in accordance with my invention;
FIGURE 2 is a cross section taken on the line II—II
a normally closed contact 104C1 is mounted on the skip
bridge and is situated with respect to the arm 102 so
that the arm 102 will open the contact 104C each time
the skip car descends but the arm 102 will not affect
of FIGURE 1;
FIGURE 3 is a ‘detailed cross sectional view of my
charging hopper and gas seal;
FIGURE 4 is a schematic diagram of the control cir
the relay 104 on the upward trip of the skip car. One
terminal of the relay coil 104 is connected to the con
tact 104C and the other terminal is connected to ground.
A DC. power source 106, 108 has its positive terminal
connected to one terminal of the motor 80 through the
contact 10'4Cl and a normally closed contact 116C of
cuit for the operation of the charging hopper; and
FIGURE 5 is a schematic diagram of the control cir
cuit for the distributor doors used in practicing my inven
tion.
Referring more particularly to the drawings reference
numeral 1 indicates the upper part of a conventional blast
a relay 110. The relay 110 also has normally closed
contact 110C1 and normally open contacts 110C2, 110C3,
furnace with the stockline ‘being indicated by the letter L.
A steel shell 2 is attached to the top of furnace 1 in any
conventional manner which will prevent leakage of gas.
The top of the shell 2 is closed and is provided with a
110C4, and 110C5. The negative terminal 108 is con
nected to the other terminal of the motor 80 through
the contact lltlCl. Normally open switches 112 and
conventional bleeder 4. The lower portion of the inside
surface of the shell 2 is provided with a wear plate 6
with refractory bricks 8 being provided between the shell
2 and the Wear plate 6.
The shell 2 is provided with an
opening 10 through which the charge is introduced in a
Rods or bear
m
114 are provided for operation by movement of hopper
72, the switch 112 being closed when the hopper is in
its dumping position and the switch 114 being closed
when the hopper is in its loading position. The terminal
106 is also connected to the relay coil 104 through the
3,095,986
contact 104C, to relay coil 104 through switch 114 and
contact 110C2, to relay coil 11!} through the contacts
104C1 and 110C5, and to relay coil 110 through switch
112. A normally open switch 116 (FIGURE 5) is
mounted on the skip bridge 98 so that it will be momen
tarily closed by the arm 102 each time the skip car 100
ascends. The positive terminal 118 of a direct current
4
This locks in relay 184 through contact 104C, preparing
it for the next cycle of operation and deenergizing relay
110 through the opening of contact 104C1.
Assuming that the doors 50 and 60 were in their lowest
positions when the hopper 70 was being dumped as de
scribed above, the charge will pass down through the chute
26 and will fall straight through the openings 34, 40, 43
and 47 onto the stockline L in the furnace 1. When the
loaded skip car 100 again ascends the skip bridge 98 the
open contacts 120C, 120C1 and 120C2. A relay coil 10 arm 102 will momentarily close the contact 116 (FIG
URE 5) which will momentarily energize the relay coil
122 is connected to terminal 118 through contact 128C
120. This will energize coil 122 through contact 120C
and has normally open contacts 122C, 122C1 and 122C2.
and lock it in through the contacts 122C and 126C2.
A relay coil 124 is connected to terminal 118 in series
Energization of coil 122 will energize coil 132 through
with contacts 120C1 and 122C1 and has normally open
power source is connected to the coil of a relay 120
through the switch 116.
The relay 120 has normally
contacts 124C, 124C1 and 124C2, and normally closed
contacts 124C3 and 124C4. A relay coil 126 having
normally open contacts 126C and 126C1 and normally
closed contact 126C2 is connected to terminal 118
through contacts 126C and 128. The contact 128 is nor
mally closed and will be opened only when the door 60
is in its lowest position due to the action of an arm 130
which is arranged to rotate with the door 60. Power
may also be supplied to relay coil 122 through contacts
126C2 and 122C. Power may also be supplied to relay
coil 124 through contacts 126C2 and 124C. Power may
contacts 126C2, 122C, 12404, and 134, closing its con
tact 132C to energize motor 58 which will operate to move
the door 50 upwardly. This movement will continue until
the arm 136 opens the contact 134 at which time the pawl
146 will engage the tooth 144A to hold the door St] in its
uppermost position. Energization of coil 122 will also
energize coil 138 through contacts 126C2, 122C, 124C3,
and 142. closing its contact 138C to energize motor 68
which will operate to move the door 60 upwardly. This
movement will continue until the contact 142 is opened
by the arm 130 at which time the pawl 152 will engage
the tooth 1508 to hold the door 60 in its intermediate posi
tion which closes opening 47. With the doors 50 and 60
also be supplied to relay coil 126 through contacts 120C2,
122C2, and 124C1. Power is supplied to the motor 58
positioned as above indicated, the charge dumped into the
through normally open contact 132C of a relay 132.
chute 26 will fall onto the stockline L through the open
The coil of relay 132 is energized through contacts
126C2, 122C, 124C4 and 134. The contact 134 is nor 30 ings 36 and 48. When the skip car 100 again ascends,
the momentary operation of relay 120 through contact 116
mally closed and is opened only when the door 50 is in
will momentarily energize the electromagnet 148 through
its highest position by action of an arm 136 which is
contacts 120C2 and 122C2 so as to disengage the pawl
arranged to rotate with the door 50. Power is supplied
146 from the tooth 144A. This disengagement is only
to the motor 68 through normally open contact 1380
momentary so that the pawl 146 will engage the tooth
of a relay 138. The coil of relay 138 is energized
1448 and stop the door 50 in its intermediate position so
through contacts 124C2 and 140 or through contacts
as to close opening 43. The momentary operation of
126C2, 122C, 124C3 and 142. The contacts 140 and
relay 120 will also energize coil 124 through the contacts
142 are normally closed and are opened by the arm 130
12tiC1 and 122C1 and the relay 124 will be locked in
only when door 60 is at its highest position or interme
diate position, respectively. A member 144 is secured 40 through the contacts 124C and 126C2. Energization of
relay 124 energizes relay 138 through contacts 124C2 and
to shaft 52 for rotation therewith and is provided with
140 thereby closing contact 138C to connect power to the
teeth 144A and 144B. A pivoted pawl 146 is arranged
to engage the teeth 144A and 1448 when the door 50
is in its highest and intermediate positions, respectively.
An electromagnet 148 is provided to release the pawl
146 from engagement with the teeth 144A and 144B
and is energized through contacts 120C2 and 122C2. A
member 150 is secured to shaft 62 for rotation therewith
and is provided with teeth 150A and 15013. A pawl 152
is provided to engage the teeth 150A and 150B and an
electromagnet 154 is arranged to disengage the pawl 152
from the teeth 150A and 15013. The electromagnet 154
is energized through the contact 126C1.
The operation of my device is as follows:
With the hopper 72 in its upright position (FIGURE
4) it is ready to receive a charge from the skip car 100
motor 68. This causes door 60 to rotate upwardly until
the contact 140 is opened by the arm 130 at which time
the pawl 152 will engage tooth 150A and hold the door
60 in its uppermost position. With the doors 50 and 60
so positioned the next charge dumped into the chute 26
will fall through openings 44 and 38 to the stockline L.
As the skip car again ascends and the contact 116 is mo
mentarily closed, power is momentarily connected to elec
tromagnet 148 through contacts 120C2 and 122C2 and
the pawl 146 is raised so as to permit the door 50 to re
turn to its lowest position. Power is also connected to
relay coil 126 through contacts 120C2, 122C2, and 124C1
and the relay 126 is locked in through the contacts 128 and
126C. The operation of relay 126 opens the contact
126C2 through which the relays 122 and 124 were locked
in with the result that those relays are deenergized. Power
into the hopper 72 it will descend and the arm 102 will
is also connected to electromagnet 154 through contact
open contact 104C and close contact 104C1. Power will 60 126C1 and the pawl 152 is disengaged from tooth 150A.
thereby be supplied to the motor 80 through contacts
The door 60' falls by gravity to its lowest position and when
104C1, 110C and 110(31 so as to dump the hopper 72.
it reaches that position the contact 128 is opened by the
As the hopper 72 rotates the door 82 will close against
arm 130 with the result that the relay 126 is deenergized.
?ange 94 due to the counterweight 90 before the door
The system is now restored to its original condition and
84 begins to open so as to provide a continuous seal be 65 is ready for another cycle of operation. Thus it is seen
tween the interior of the furnace and the atmosphere.
that each charge is distributed through a dilferent pair of
When the hopper 72 reaches the dumping position the
openings so that the burden will be distributed uniformly
contact 112 will be closed and the relay coil 110 will
in the furnace. As each load is charged into the furnace
be energized closing its contacts 110C3 and 11003 so
as to reverse the polarity of the power supplied to the 70 the gas loss will be a minimum because only one of the
doors 82 and 84 will be open at any one time.
motor 80 to return the hopper 72 to its upright position.
While one embodiment of my invention has been shown
The relay coil 110 will be locked in through contacts
and described it will be apparent that other adaptations
110C5 and 104C1 during this time. When the hopper
and modi?cations may be made without departing from
72 reaches its upright position the contact 114 will close
the scope of the following claims.
to energize relay coil 104 through contacts 114 and 110C2.
and the door 84 is closed so as to seal in the blast fur
nace gases. After the skip car 100 has dumped its load
3,095,986
5
I claim:
1. in a blast furnace an outer shell mounted on top of
said furnace and extending upwardly therefrom, an inner
shell arranged concentrically within said outer shell above
the stock line of the furnace and arranged for conveying
6
and approximately 60° from said second opening, and a
fourth opening located between said ?rst and second open
ings and approximately 60° from said ?rst opening, a first
door for closing said ?rst opening, a second door for
closing said second opening, a ?rst motor for operating
said ?rst door, a second motor for operating said second
door, a slanted chute communicating from said ?rst open
ing to a point approximately 180° from said third open
exhaust gases therethrough, a first chute slanting down
wardly around said inner shell within said outer shell,
said chute having a plurality of openings therein for dis
ing, and a slanted chute communicating from said sec
charging material therefrom, a second chute slanting
downwardly from one of said openings around said inner 10 ond opening to a point approximately 180° from said
fourth opening.
shell, said second chute having at least one opening therein
5. In a blast furnace according to claim 4 in which said
for discharging material therefrom, means to selectably
conveying means includes a housing, said housing having
close at least one of said openings, and means for con
an opening to the atmosphere and an opening into said
veying raw materials through the said outer shell to said
?rst chute.
15 distributing means, a charging hopper mounted in said
housing for movement about a generally horizontal axis,
2. In a blast furnace an outer shell mounted on top of
means for moving said hopper between a position wholly
said furnace and extending upwardly therefrom, an inner
within said housing and a position at least partially out
shell arranged concentrically within said outer shell and
side said housing, a ?rst door normally closing the open
arranged for conveying exhaust gases therethrough, a ?rst
chute slanting downwardly around said inner shell within 20 ing to the atmosphere and movable outwardly from said
housing, and a second door within said housing on the
said outer shell, said ?rst chute including ?rst and second
furnace side of said hopper, said second door closing the
portions extending peripherally around said inner shell
opening toward the inside of the furnace when said hopper
and disposed on opposite sides thereof. said chute having
is at least partially out of said housing.
a pair of openings therein one at each side of the bottom
6. In a blast furnace the improvement which comprises,
thereof and a second pair of openings therein one at each 25
a stationary outer shell mounted on top of the furnace, a
side of said inner shell substantially half way down the
stationary inner shell disposed within said outer shell ter
length thereof, a second chute slanting downwardly from
minating at a gas entry opening above the stock line of
the second pair of openings around said inner shell, said
the furnace, means to exhaust gas from the inner shell, and
second chute having an opening therein under each of
said second pair of openings, a door associated with each 30 distributing means including at least one stationary chute
between said shells to receive and distribute raw material
of said second pair of openings and the opening therebe_
in the furnace.
heath, said doors being adapted to close either of its asso
7. The device of claim 6 wherein the chute has a plu
ciated openings, said second chute having a pair of open
rality ‘of openings therein communicating with the fur
ings therein one at each side of the bottom thereof, and
nace.
means for conveying raw materials through the said outer
8. The device of claim 7 further characterized by
shell to said ?rst chute.
3. In a blast furnace according to claim 1 in which said
means adapted to close at least one of said openings
whereby to regulate the discharge of material from said
conveying means includes a housing, said housing having
chute.
an opening to the atmosphere and an opening into‘ said
9. In a blast furnace an outer shell of substantially cir
?rst chute, a charging hopper mounted in said housing for 40
movement about a generally horizontal axis, means for
cular cross section mounted on top of said furnace and
moving said hopper between a position wholly within said
housing and a position at least partially outside said hous
ing, a ?rst door normally closing the opening to the at
mosphere and movable outwardly from said housing, and
extending upwardly therefrom, an inner shell substan
tially concentric with said outer shell and located above
stantially annular member spaced vertically with respect
said housing.
the stock line of the furnace, means for distributing raw
materials located in the annular space between said shells,
said distributing means including a chute having a plu
a second door within said housing on the furnace side of
rality of openings through which the raw materials fall
said hopper, said second door closing the opening toward
onto the stock line of the furnace, means for conveying
the inside of the furnace when said hopper is at least par
raw materials to said distributing, means, said conveying
tially out of said hood.
4. In a blast furnace an outer shell mounted on top of 50 means including a housing having an opening to the at
mosphere and an opening into said chute, a charging
said furnace and extending upwardly therefrom, an inner
hopper mounted in said housing for movement about a
shell arranged concentrically within said outer shell and
generally horizontal axis, means for moving said hopper
arranged for conveying exhaust gases therethrough, means
between a position wholly within said housing and a posi
located in the space between said outer shell and said inner
tion at least partially outside said housing, a ?rst door
shell for distributing raw materials about the periphery of
normally closing the opening to the atmosphere and mov
the space, means for conveying raw materials through the
able outwardly from said housing, and a second door
said outer shell to said distributing means so arranged as
within said housing on the furnace side of the housing,
to reduce to a minimum the passage of blast furnace gases
said second door closing the opening toward the inside of
through said outer shell. said distributing means including
a lower substantially annular member and an upper sub 60 the furnace when said hopper is at least partially out of
to one another and with respect to said inner and outer
shells to form a slanted chute, means for equally dividing
the flow of raw materials from said conveying means, said
lower annular member having a ?rst opening located at 65
a point approximately 90° around said annular member
from said dividing means, a second opening located at a
point approximately 180° from said ?rst opening, a third
opening located between said ?rst and second openings
References Cited in the ?le of this patent
UNITED STATES PATENTS
910,233
1,301,370
1,724,402
2,814,478
Roberts ______________ __ Jan.
Brennan _____________ __ Apr.
Holden ______________ __ Aug.
Van Loon ___________ __ Nov.
19,
22,
13,
26,
1909
1919
1929
1957
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