JPS6150856B2 - - Google Patents

Description

Detailed Description of the Invention [Technical Field] The present invention generally relates to the method of supplying powder and granules (hereinafter referred to as "powder") to a predetermined high temperature area uniformly or at a desired distribution ratio. The present invention relates to a granular material feeding device that can be used extremely effectively as a rotary ore feeder for dispersing raw materials such as ore and coke into a smelting furnace. .

[Prior art and its problems]

BACKGROUND ART In the metal smelting industry and other various industries, it is extremely common to supply powdered raw materials to high temperature reaction vessels and the like. In this case, it is required to supply the raw material uniformly or at an appropriate distribution ratio to a predetermined area. As one such attempt, a furnace top distribution device has been proposed in Japanese Patent Laid-Open No. 122407/1983. That is, a chute for powder and granular material is passed through an eccentric position of a rotary base that covers the top of the furnace and extended into the furnace, and the chute is cranked so that the powder and granular material fall port is moved from the penetrating position to an eccentric position. It is curved. By rotating the base and the chute separately, double rotational motion is applied to the chute outlet, making it possible to uniformly charge raw material powder and granules.

However, in this method, since a large portion of the chute is located inside the furnace, the chute has the disadvantage of being damaged by exposure to the high temperature of the furnace, and has poor durability and requires frequent maintenance.

[Object of the present invention]

Therefore, an object of the present invention is to provide an apparatus in which the powder supply device including the chute portion is sufficiently protected, and which is capable of uniformly supplying the powder and granule as described above.

[Structure and effects of the invention]

Next, an embodiment in which the powder supply device according to the present invention is used as a rotary ore feeder for a zinc distillation and smelting furnace will be described in detail with reference to the drawings.

A rotary ore feeder 1 which is a powder supply device according to the present invention is installed at a top opening 2 of a normal zinc distillation and smelting furnace 100.
is placed above the The rotary ore feeder 1 includes a rotary carriage 4 rotatably configured to cover the furnace top opening 2, and a swing chute 6 rotatably attached to the rotary carriage 4.

The rotating carriage 4 includes a disk-shaped main base 8 large enough to cover the furnace top opening 2, and a cylindrical cylinder located above the main base 8 and formed around an axis O concentric with the main base. It has a cylindrical support body 10 having a shape. The main base 8 has an opening 12 for rotatably receiving the swing chute 6, as will be explained in detail later, and the bottom surface of the main base 8 is provided with suitable heat insulation except for the opening 12. A material 14 is provided. Also, the base 8 and
A rotatable connecting seal (sand seal) is provided between the furnace top opening 2 of the zinc distillation smelting furnace 100,
The connecting portions of the two are configured to be connected in a sealed manner.
That is, the rotatable connecting seal is provided at the sand reservoir groove 20 formed by filling the sand 18 into the circumferential groove 16 provided at the periphery of the furnace top opening, and at the outer periphery of the main base 8 of the rotary carriage 4. a cylindrical seal plate 21 that protrudes downward and enters the sand 18 in the sand trap groove 20;
It consists of

The cylindrical support 10 of the rotating carriage 4 has a cylindrical peripheral wall 22 and a bottom wall 24 integrally connected to the lower edge of the cylindrical peripheral wall 22.
A central opening 26 is formed therein. The peripheral wall 22 and the bottom wall 24 are reinforced by ribs 28 provided at appropriate locations. At a suitable location along the inner circumference adjacent to the opening 26 of the bottom wall 24, a connecting frame 29 is provided between the main base 8 and the cylindrical support 10 and the main base 8. are integrally and rigidly connected. An annular race 30 is secured along the outer circumference of the bottom wall 24. The annular race 30 is attached to a fixed machine base 20 that is provided surrounding the rotary ore feeder 1.
Thrust support means 20 rotatably supported at 0
2. The thrust support means 202 is a suitable number of rollers provided below the annular race 30 at equal intervals, and moves to rotatably support the rotary ore feeder 1. The rollers 202 preferably have surfaces tapered towards the axis of rotation O of the rotary ore feeder 1, so that the annular race 30 is also inclined outwardly to accommodate the rollers 202. With this shape, it is possible to expect a self-aligning effect of the rotary ore feeder 1.

Furthermore, a race 3 is also provided on the lower circumferential portion of the cylindrical peripheral wall 22.
2 is provided and contacts a guide roller 204 rotatably attached to the machine stand 200. Appropriate guide rollers 204 are positioned around the outer periphery of the cylindrical peripheral wall 22 to guide the rotary ore feeder 1 to rotate around the rotation axis O. A rotating carriage drive gear 34 is integrally attached to the upper circumferential portion of the cylindrical peripheral wall 22 adjacent to the race 32 . The gear 34 is a pinion 208 provided on the machine base 200.
mesh with. The pinion 208 is a shaft 21 attached to a vertical frame 206 fixed to the machine base 200.
0 and is driven by a drive motor (not shown) via a bevel gear 212 that is integrally connected to the pinion 208. Therefore, when the drive motor is energized, the rotating carriage 4 moves along the center axis of rotation O.
rotated around.

The rotating chute 6 is the main base 8 of the rotating carriage 4.
The sub-base 40 is rotatably received in the eccentric opening 12 of the main body. The center O of the aperture 12 is eccentric from the center of rotation O by an amount E, and when the radius R of the aperture 12 is R>E. The sub-base 4
It will be appreciated that the center of 0, ie the center of rotation, coincides with the center O of the aperture 12. Sub-base 40
A cylindrical chute 42 is fixed by a fixture 46 with the center (O) at a position offset by e from the rotation center O. The lower end of this chute 40 terminates near the lower surface of the heat insulating material 44. The lower end of the chute 42 protrudes through the sub-base 40. Similar to the main base 8, a heat insulating material 44 is attached to the bottom surface of the sub base 40 except for the chute 42. The size of the chute 42 is appropriately selected as desired.

The swing chute 6 includes a chute housing 50 integrally attached to the sub-base 40 by a fixture 48. The upper part of the shoot housing 50 forms a cylindrical powder supply port 52, and the lower part forms a discharge port 54 connected to the chute 42. At this time, the axis of the supply port 52 is made to coincide with the rotation center axis O of the sub-base 40, that is, the rotating chute 6. A rigid support disk 56 is fixed to the cylindrical peripheral wall of the supply port 52 of the shoot housing 50 . The support disk 56 has its center at the rotational center axis O, and its lower surface is supported by a thrust support member 62 attached to a framework 60 fixed to the main base 8. Further, the outer peripheral edge of the support disk 56 is connected to the framework 60.
For example, four grooved wheels 64 are fitted into the outer peripheral grooves of four grooved wheels 64 rotatably attached to the support disk 56.
That is, when the swing chute 6 rotates around the axis of rotation O, it is guided in a stable movement.

A chain wheel 70 is fixed above the cylindrical feed section 52 of the shoot housing 50 and adjacent to the support disk 56 . On the other hand, the framework 60 fixed to the main base 8 has a drive motor 72,
A reduction gear 74 and a drive chain wheel 76 connected to the output shaft of the reduction gear 74 are provided, and the chain wheel 70 and the drive chain wheel 76 are connected by a chain 78. Therefore, when the drive motor 72 is energized, the chain wheel 70 is driven via the reduction gear 74, the drive chain wheel 76, and the chain 78. When the chain wheel 70 is driven, the swing chute 6 is rotated independently around the axis of rotation O within the opening 12 of the main base 8, independently of the movement of the main base 8, that is, the rotary carriage 4. .

The main base 8 and the secondary base 40 are arranged in a rotatable manner similar to that described above in order to allow relative movement between the rotary carriage 4 and the swing chute 6 and to maintain a seal between them. connected by a seal. That is, the rotatable seal connects the sand trap groove 80 provided around the opening 12 of the main base 8 and the sub base 40.
A cylindrical seal plate 84 is attached to the outer circumferential wall of the sand trap and protrudes upward, and then bends into the sand 82 of the sand trap groove 80.

A rotary connection chute 92 is connected between the feed port 52 of the chute housing 50 and a raw material chute 90 from an ore and coke feed furnace top bin (not shown).
is provided. The raw material chute 90 is disposed with the axis of rotation O of the rotary carriage 4 as its axis, and the rotary connection chute 92 is attached to a mount 96 on a horizontal frame 94 provided on the upper part of the cylindrical peripheral wall 22 of the rotary carriage 4. It is then fixed. The connecting chute 92 is rotatably and sealingly connected at each end to the raw material chute 90 and the chute housing 50, respectively, by rotatable seals 98 and 98' of the same construction as described above. With the above configuration, the rotary carriage 4 and the swing chute 6 can freely rotate despite the presence of the connecting chute 92.

The operating mode of the rotary ore feeder 1 configured as above will be explained.

Zinc distillation smelting furnace inner diameter 2052mm, inner furnace area
When the area was 33071 m ² , the raw material consumption was 8 m ³ /H (maximum), and the raw material descent speed was 4032 mm/min, good zinc smelting could be carried out by operating the ore feeder as follows.

The swing chute 6 is always operated at a speed of 3 rpm, and the rotating carriage has five rotational speeds, namely, a first speed of 1.195 rpm, a second speed of 2.136 rpm, a third speed of 2.875 rpm, a fourth speed of 4.467 rpm, and a second speed of 2.875 rpm. 5
It was operated at a controlled speed of 4.607 rpm.

In FIG. 3, the chute 4 of the swing chute 6
2 is the outermost scattering supply position of the rotary ore feeder 1 ()
A main drive motor (not shown), which drives the rotating carriage 4, is energized. At this time,
The drive motor 72 of the swing chute 6 is not energized;
The chute 42 of the swing chute 6 thus moves along the trajectory A. This state continues for 48.1 seconds. The chute 42 reaches position (). At this point, the drive motor 72 of the swing chute 6 is energized to rotate the swing chute 6 for 4.2 seconds. Shoot 4
2 follows the trajectory B by the rotation of the swing chute 6 and the rotating carriage 4 and reaches the position (). At that point, the main drive motor is sped up from the previous first rotational speed to the second rotational speed. Since the rotation of the swing chute 6 is stopped, the chute 46 follows the trajectory C and reaches the position ( ) in 27.2 seconds. At this point, the drive motor 72 of the swing chute 6 is energized and drives the swing chute 6 for 1.9 seconds. The chute 42 follows the trajectory D from position () to reach position (). At this point, the main drive motor is sped up from the previous second rotational speed to the third rotational speed. Since the rotation of the swing chute 6 is stopped, the chute 46 follows the trajectory E and reaches the position () in 20.1 seconds. At that point, turn chute 6
The drive motor 72 is energized and drives the swing chute 6 for 1.6 seconds. The chute 42 follows the trajectory F from position () to reach position (). At this point, the main drive motor is accelerated from the previous third rotational speed to the fourth rotational speed. Since the rotation of the swing chute 6 is stopped, the chute 46 follows the trajectory G and reaches the position () in 16.0 seconds. At this point, the drive motor 72 of the swing chute 6 is energized.
Drives turning chute 6 in 2.2 seconds. Shoot 42 follows the trajectory H from position () to position ()
reach. At that point, the main drive motor is sped up from the fourth rotational speed to the fourth rotational speed. Since the rotation of the rotating chute 6 is stopped, it follows the trajectory I and reaches the position () in 11.9 seconds. Through the above series of operations, the operation of the swinging chute 6 toward the inside of the chute 42 is completed, and the next swinging chute 6
The rotational movement of will cause the chute 42 to move outwardly. The outward movement of the chute 42 is carried out in exactly the same manner, resulting in the chute 4
2 reaches position (XI) on orbit A, and one cycle of operation of the rotary ore feeder 1 is completed.

According to the above operation mode, the zinc distillation smelting furnace 10
At 0, the raw material is uniformly spread into the furnace as shown in FIG. However, by controlling the rotation of the rotating chute 6 and the rotating carriage 4 in various ways, it is possible to supply a large amount of raw material to the central part of the furnace, or to supply a large amount of raw material to the peripheral part of the furnace. It is also possible to control the Furthermore, by combining the control of the input raw material supplied to the rotating chute 6 and the control of the rotary ore feeder, control such as supplying a large amount or a small amount of a specific raw material to a specific region of the furnace becomes possible. .

[Summary of effects]

In the present invention, an eccentric circular opening is provided in the main base 8 which is insulated with a heat insulating material 14, and a heat insulating material 4 is provided in this opening.
Since the sub-base 40 lined with 4 is rotatably provided, and the chute 42 is provided which penetrates the sub-base 40 and opens near the bottom surface thereof, the chute is not substantially exposed to high heat. Thus,
It is possible to supply powder and granules into the furnace in a desired uniform or arbitrary distribution pattern as described above, and to significantly extend the life of the feeding device while enabling smooth operation.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a powder supply device according to the present invention. FIG. 2 is a plan view taken along line - of the powder supply device of FIG. 1. Figure 3 is the first
It is a figure explaining operation of the powder supply device of a figure.
FIG. 4 is a sectional view showing the distribution of powder and granular material obtained by the powder and granular material supplying device of FIG. 1. FIG. DESCRIPTION OF SYMBOLS 1... Powder supply device, 4... Rotating carriage, 6... Rotating chute, 8... Main base, 10...
... Cylindrical support body, 34 ... Drive gear, 40 ... Sub-base, 42 ... Chute, 50 ... Chute housing, 72 ... Drive motor, 90 ... Raw material chute, 92 ... Rotating connection chute.

Claims (1)

[Claims] 1. A rotary carriage having a disc-shaped heat-insulating main base rotatably attached to the top of a high-temperature reaction vessel such as a smelting furnace, and a first driving means for driving the main base, and further comprising: a disc-shaped heat-insulating sub-base received in a circular opening provided eccentrically in the main base of the rotary carriage and rotatably attached to the rotary carriage; A rotating chute having a chute extending through the base and terminating in close proximity to the bottom surface of the sub-base, and a chute housing having one end connected to the chute and the other end connected to a powder supply port. and the pivoting chute is configured to be driven by a second drive means attached to the rotating carriage, whereby the pivoting chute is configured to be capable of rotational movement independent of the rotational movement of the rotating carriage. Features: Powder supply device for high-temperature reaction vessels.