JPH05237359A - Device for distributing and supplying raw material in vibrating granulator - Google Patents

Abstract

PURPOSE:To efficiently produce large amounts of a granular product which is uniform in grain diameter and homogeneous. CONSTITUTION:In a vibrating granuator 5, a wet raw material is introduced into a plurality of trough-like vessels 35 arranged in multistages. Circular vibration is given in the direction along the discharge direction of the raw material. The raw material is rolled and lumped to obtain minipellets. In a device 50 for distributing and supplying the raw material in the vibrating granulator 5, a straightening plate 52 for preventing scattering of the raw material is provided in the upper part of the raw material introducing parts 35A of all trough-like vessels 35. Moreover raw material distributing plates 53A, 53B are fitted to the raw material introducing parts 35A of the respective troughlike vessels 35. The oblique angles for the falling direction of the raw material are regulated. The raw material distributing plates 53A, 53B are integrally vibrated together with the respective trough-like vessels 35.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material distribution and supply device for evenly distributing and supplying a raw material to a vibrating granulator such as used for pulverizing fine iron ore.

[0002]

2. Description of the Related Art In the iron-making industry, there is a process for pulverizing finely powdered iron ore (hereinafter referred to as a raw material) into a sinter having a good quality. In order to efficiently powder the raw material in this step, the present applicant applies the method described in Japanese Patent Application No. 3-207285 to Japanese Patent Application No. 3-207289.
We proposed a vibration granulator using a method called vibration granulation.

This vibrating granulator has, for example, as shown in FIG. 11, a raw material feeding portion 1 formed at one end and a raw material discharging portion 2 at the other end, and two raw materials having the same phase and the same phase are arranged in a horizontal plane. Two eccentric shafts 3 that are driven to rotate in the direction indicated by the solid arrow with amplitude 3
The trough-shaped containers 4 loaded on the top are arranged in a plurality of stages in the vertical direction,
It has a structure in which a plurality of rows are closely arranged side by side in the lateral direction.

In the vibrating granulator having such a structure, the container 4 is given a circular vibration as shown by an arrow at any portion thereof by the rotation of the two eccentric shafts 3 in the directions of solid arrows. As a result, the wet raw material charged from the supply port 1 of the container 4 and humidified and mixed to a required degree of wetness is
It is thrown up by the action of the circular vibration of the container 4,
Then, it falls and is further transferred to the discharge port 2 side while being repeatedly rotated, and during this time, the raw material is granulated, and finally the product in the form of particles is discharged from the discharge port 2.

[0005]

However, in the vibrating granulator as described above, the amount of the raw material to be inserted into the supply port 1 is evenly distributed in any of the containers 4 arranged in the vertical and horizontal directions. It is indispensable to stably and consistently supply and supply a continuous fixed amount in order to efficiently produce a uniform granular product having a uniform particle size and a large amount.

However, the humidified and mixed wet raw material used in the above-described vibrating granulator has very poor fluidity and has a very unwieldy property that it is extremely likely to adhere to the wall surface.

[0007] For example, in a conventionally used feeding device 6 such as a so-called hopper shown in FIG. 12 in which the storage part 5 becomes narrower toward the bottom, it is charged from the upper part and filled. When the processed raw material is taken out from the lower part, it is very easy to use the raw material
Since the fluidity of the raw material is poor, a bridge as shown in the drawing is formed and it becomes a closed state and becomes unusable.

Further, even if the raw material is discharged from the lower portion of the supply device 6, it is extremely difficult to evenly distribute the raw material in the entire raw material charging area of the container 4. The raw material discharged from the lower part of the supply device 6 is provided below the supply device 6 as shown in FIG.
In the method of allocating by the method, the fluidity of the raw material is poor, and since it does not flow in a uniform state, the desired purpose cannot be achieved.

Further, in such a supply device 6, the discharge amount of the raw material largely fluctuates due to the influence of the amount of the raw material staying in the storage section 5, that is, the weight of the raw material.
A certain amount of raw material cannot be stably supplied.

Due to the above-mentioned reasons, the conventional raw material supplying device cannot be applied to the vibrating granulator, and the technical development of the raw material distributing and supplying device for effectively operating the vibrating granulator has been urgently required. ..

The present invention provides a uniform granular product having a uniform particle size by uniformly and stably supplying the raw material to the entire area of the raw material charging area of the vibrating granulator. The purpose is to be able to produce efficiently and in large quantities.

[0012]

According to the present invention, a wet raw material is introduced into a plurality of trough-shaped containers arranged in multiple stages, circular vibration is applied in a direction along the discharge direction of the raw material, and the raw material is tumbled. It is a raw material distribution and supply device of a vibrating granulator that obtains mini pets.A straightening plate for preventing raw material scattering is provided above the raw material input part of all trough-shaped containers, and the raw material distribution part of each trough-shaped container is distributed. A plate is attached to the raw material distribution plate so that the inclination angle with respect to the raw material falling direction can be adjusted, and the raw material distribution plate can vibrate integrally with each trough-shaped container.

[0013]

The raw material is surely dropped toward the raw material feeding portion of the all trough-shaped container of the vibrating granulator by the raw material scattering prevention rectifying plate. Each raw material distribution plate attached to the raw material feeding part of each trough-shaped container is adjusted in tilt angle manually or automatically, and vibrates integrally with each trough-shaped container to drop the above-mentioned raw material into each trough. Dispense in a container. That is, each raw material distribution plate prevents the raw material from adhering by vibrating it, and evenly distributes the raw material to each trough-shaped container by adjusting its inclination angle.

[0014]

FIG. 1 is a schematic view showing a vibrating granulator equipped with a raw material distributing and feeding device according to an embodiment of the present invention, FIG. 2 is a sectional view of a main part of FIG. 1, and FIG. 3 is a trough-shaped container and raw material. FIG. 4 is a schematic diagram showing an anti-scattering rectifying plate, FIG. 4 is a schematic diagram showing a tilt angle adjusting device of a raw material distribution plate, FIG. 5 is a schematic diagram showing an example of a mounting structure of the raw material distribution plate in a three-stage trough, and FIG. FIG. 7 is a schematic diagram showing an example of a mounting structure of a raw material distribution plate in a trough, FIG. 7 is a schematic diagram showing an example of a mounting structure of a raw material distribution plate in a five-stage trough, and FIG. 8 is a schematic view showing an example of mounting structure of a raw material distribution plate in a five-stage trough. FIG. 9 is a sintering process diagram to which the present invention is applied, FIG.
0 is a schematic diagram showing an example of a stirring mixer, FIG. 11 is a schematic diagram showing an example of a vibrating granulator, and FIG. 12 is a schematic diagram showing a conventional raw material supply device.

In the sintering process for the DL type sintering machine using the method of the present invention, as shown in FIG. 9, the fine powder raw material charged in the fine powder ore tank 1 is cut out in a fixed amount by the lower constant feeder 2 and Is conveyed by a belt conveyor 3 and this raw material is supplied to a stirring and mixing machine 4 to be mixed with proper granulation water and stirred and mixed so as to obtain a uniform water content. Further, this raw material is supplied to a vibrating granulator 5 by a raw material distribution and supply device 50 described later to pre-granulate mini pellets having a particle size of 2 to 10 mm and a yield of 80% by weight or more. On the other hand, ordinary sintering raw materials (returned ore, limestone, coke, powder ore, etc.) quantitatively cut by the lower constant feeder 7 of the compounding tank 6 are layered and mixed on the belt conveyor 8 and then mixed in a drum mixer. At 9, the water is added so that the water content of the whole raw material becomes 5 to 7%, and the mixture is tumbled and granulated by rotating the drum, and the ore feeding hopper 10
To a drum feeder 11 and cut out quantitatively. Then, the vibration-granulated mini-pellets and the secondary blended raw material are mixed on the belt chute 12 and charged into the pallet 14 of the DL type sintering machine 13, and then the coke in the raw material is ignited in the ignition furnace 15. And sinter.

Here, the stirring and mixing machine 4 is as shown in FIG. That is, the agitator-mixer 4 has two twin U-shaped containers 18 fixed to a pedestal 17 via a pedestal 16 and two spiral blade shafts 19, which rotate in mutually opposite directions (the upper half is rotated outward). 20 are arranged in parallel, and stirring blades 21 are spirally fixed to the spiral blade shafts 19 and 20. Each spiral blade shaft 1
9 and 20 are supported by bearings 22 at their both shaft ends,
The drive motor 2 is connected to the shaft end on the mining side via a shaft coupling 23.
4 is connected. Further, a raw material inlet 25 is provided on the start side of the spiral blade shafts 19 and 20 of the twin U-shaped container 18, a raw material outlet 26 is provided on the end side of the spiral blade shafts 19 and 20, and the downstream side of the raw material inlet 25. A humidifier 27 is provided in the.

The vibrating granulator 5 is as shown in FIGS. That is, the vibration granulator 5 is mounted on the pedestal 30.
Two eccentric shafts 33 and 34 are axially supported via bearings 31 and 32, and the eccentric shafts 33 and 34 support a plurality of wide-angle trough-shaped flat plate bottom containers 35 in a multi-stage multi-row state. Incidentally, 36 is a bracket and 37 is a connecting pin.

That is, the vibrating granulator 5 has a raw material feeding section 35A at one end and a raw material discharging section 35B at the other end, and two arrows arranged in the horizontal plane have the same phase and the same amplitude as indicated by arrows. The structure is such that trough-shaped containers 35 loaded on two eccentric shafts 33 and 34 that are rotationally driven in the direction are closely arranged side by side in a plurality of stages in the vertical direction and in a plurality of rows in the lateral direction.

The eccentric shaft 33 is driven by a drive motor 39 via a shaft joint 38, and the eccentric shaft 34 is driven synchronously with the eccentric shaft 33 via a timing belt 41. As a result, the vibrating granulator 5 causes the raw material in the container 35 to have a circular vibration (amplitude 10 to 30 mm;
Vibration frequency of 600 to 1000 times / min.

At this time, the flat bottom container 35 is supported substantially horizontally by the bracket 36, and the raw material is charged under the condition that the aforementioned eccentric shafts 33, 34 are circularly oscillated in the clockwise direction in FIG. The raw material is supplied from the portion 35A, and the raw material is fed to the raw material discharge portion 35B. here,
The raw material in the container 35 is set to have a layer thickness of 15 mm or less. Thereby, the raw material charging section 3 of the container 35
The wet raw material charged from 5A and humidified and mixed to the required degree of wetness is given a circular vibration with an amplitude of 10 to 30 mm for 4 seconds or more, and is thrown upward by the action of this circular vibration.
Then, it falls and is further transferred to the raw material discharge part 35B while being repeatedly subjected to a rotation motion, and during this time, it is rolling agglomerated and becomes a mini pellet.

The flat bottom container 35 is provided in the raw material charging section 3
For example, a downward gradient of 10 degrees may be applied from 5A toward the raw material discharge part 35B, and counterclockwise circular vibration may be applied. According to this, in the container 35, the fine particles move to the raw material feeding part 35A side and are agitated to become core particles, while the grown particles move to the raw material discharging part 35B side by gravity, and the particle size is made uniform. It will be discharged in the state.

However, in this embodiment, in order to supply the wet raw material which is agitated and mixed by the agitating and mixing machine 4 to the vibrating granulator 5, a raw material distribution and supply device 50 as shown in FIGS. 1 to 4 is provided. ing. That is, the raw material distribution / supply device 50 distributes and supplies the raw materials that are preliminarily humidified and mixed so as to have a desired wetness condition, to the respective raw material charging sections 35A of the vibrating granulator 5.

The raw material distribution / supply device 50 is arranged between the agitating mixer 4 and the vibrating granulator 5, and is provided with a conveyor belt conveyor 51, a raw material scattering prevention rectifying plate 52, a raw material distributing plate 53A,
It is configured to have 53B.

The belt conveyor 51 conveys the raw material discharged from the raw material discharge port 26 of the agitating mixer 4 to the upper part of the raw material scattering prevention straightening plate 52 and drops it.

The raw material scattering prevention straightening plate 52 has a frame-like shape as shown in FIG.
It is installed above 5A.

The raw material distribution plates 53A and 53B are attached to the raw material feeding portion 35A of each container 35, the inclination angle with respect to the raw material dropping direction can be adjusted, and the raw material distribution plates 53A and 53B can vibrate integrally with each container 35.

In the vibrating granulator 5 of this embodiment, the containers 35 are arranged in four stages, and the raw material distribution plate 53 is arranged in the second stage container 35.
A is attached, and the raw material distribution plate 53B is attached to the fourth-stage container 35.

Further, the raw material distribution plates 53A, 53 of the present embodiment.
B is a tilt angle adjusting device 54 as shown in FIG.
It is said that their inclination angles can be automatically adjusted.

However, the inclination angles of the raw material distribution plates 53A and 53B may be manually adjusted.

The tilt angle adjusting device 54 includes a support plate 55 integrated with the container 35, and a raw material distribution plate 53A (5
3B is also the same). On the other hand, a motor 57 is rotatably supported by a pin (not shown) on the support plate 55, and a screw shaft 58 is connected to an output shaft of the motor 57. And the raw material distribution plate 53A (53B is also the same)
A nut 61 is rotatably supported via a pin 59,
The above-mentioned screw shaft 58 is screwed onto the nut 61. As a result, the tilt angle adjusting device 54 transmits the screw motion of the screw shaft 58 due to the rotation of the motor 57 to the nut 61, and the screw shaft 5 moves.
Raw material distribution plate 5 with nut 61 moving along
Swing 3A (same for 53B) and make its tilt angle adjustable

In the raw material distribution / supply arrangement 50, the container 35 of the vibrating granulator 5 has the stages 2 as shown in FIG. 3 (A).
In the case of the row arrangement, a partition plate 62 is provided so as to extend the intermediate wall of the vessels 35 adjacent to each other in the horizontal direction, and the raw material is divided into two vessels 35 in two rows.

Next, the operation of the raw material distribution / supply device 50 will be described. (1) Appropriate water is added by the stirrer / mixer 4 and uniformly mixed, and the wet raw material is discharged from the raw material discharge port 26 to the belt conveyor 51, and the belt conveyor 51 causes the raw material scattering prevention straightening plate 52 to move upward. Is led to and dropped.

(2) The raw material dropped from the belt conveyor 51 is guided to above the raw material charging section 35A of all the containers 35 by the raw material scattering prevention straightening plate 52.

(3) The raw material guided to the raw material feeding section 35A of all the containers 35 by the raw material scattering prevention rectifying plate 52 is distributed and fed to each raw material feeding section 35A by the raw material distribution plates 53A and 53B. At this time, the raw material distribution plates 53A and 53B are
It vibrates together with the vibrating granulator 5 to prevent the wet raw material from adhering. Further, the raw material distribution plates 53A and 53B are capable of adjusting their inclination angles by an inclination angle adjusting device 54, and the inclination angles thereof are adjusted according to the property of the input side raw material and the variation in the production amount between the containers 35. The angle is adjusted, and the raw material is evenly distributed and supplied to each container 35.

Therefore, according to this embodiment, there are the following effects. The raw material is provided by the straightening plate 52 for preventing the raw material from scattering.
Raw material charging section 35A of all trough-shaped container 35 of vibration granulator 5
You can surely let it fall toward. Then, the raw material distribution plates 53A, 53B attached to the raw material feeding portion 35A of each trough-like container 35 have their inclination angles adjusted manually or automatically, and vibrate integrally with each trough-like container 35, The falling raw material is distributed to each trough-shaped container 35. That is, the raw material distribution plates 53A and 53B prevent the raw material from adhering due to the vibration thereof, and evenly distribute the raw material to the trough-shaped containers 35 by adjusting the inclination angle thereof.

In the practice of the present invention, the vibrating granulator 5
When the total number of trough-shaped containers 35 is n, the number of the raw material distribution plates 53 installed is preferably n-2 or n-1. The optimum number of the material distribution plates 53 to be installed is n-2, and it is possible to adjust the deviation of the material falling by n-1. Specifically, the following (A) to (C) are adopted.

(A) Three-stage trough When the minimum number of sheets is one, the raw material distribution plate 53A is attached to the second-stage container 35 (see FIG. 5 (A)).

In the case of using two sheets capable of adjusting the deviation of drop, in addition to the raw material distribution plate 53A, the raw material distribution plate 5 is further added.
3B is attached to the container 35 of the third stage (see FIG. 5B).

(B) Four-stage trough When the minimum number is two, the raw material distribution plate 53A is attached to the second-stage container 35, and the raw material distribution plate 53B is attached to the fourth-stage container 35 (see FIG. 6 (A)). ..

In the case where the number of sheets is adjusted so that the deviation of the drop can be adjusted, in addition to the above-mentioned raw material distribution plates 53A and 53B, a raw material distribution plate 53C is attached to the third stage container 35 (FIG. 6).
(See (B)).

(C) Five-stage trough When the minimum number of sheets is three, the raw material distribution plate 53A is the second-stage container 35, the raw material distribution plate 53B is the fourth-stage container 35, and the raw material distribution plate 53C is the fifth-stage trough. Attach to container 35 (Fig. 7 (A))
reference). At this time, within the projected area of the frame size of the raw material scattering prevention straightening plate 52, a region corresponding to the front end of the raw material distribution plate 53A,
The ratio of the upper open area of the second-stage raw material charging section 35A, the upper open area of the third-stage raw material charging section 35A, and the front end corresponding areas of the raw material distribution plates 53B and 53C to each other is 1: 1: 1: 2. It is preferably set (see FIG. 7B).

In the case where the number of sheets can be adjusted against the deviation of drop, four raw material distribution plates 53A to 53C and a raw material distribution plate 53D are attached to the container 35 of the third stage (FIG. 7).
(See (C)). At this time, the raw material distribution plate 53D is set vertically, and within the projected area of the frame size of the raw material scattering prevention straightening plate 52, a region corresponding to the front end of the raw material distribution plate 53A, an upper open region of the second stage raw material feeding portion 35A. Third stage raw material charging section 35
It is preferable that the ratio of the upper open region of A and the front end corresponding regions of the raw material distribution plates 53B and 53C is set to 1: 1: 1: 2 (see FIG. 7D).

As described above, the raw material distribution / supplying device 50 according to the present invention can stably and uniformly distribute the raw material to a wide range (a plurality of raw material feeding portions 35A) of the raw material feeding region of the vibrating granulator 5. The performance and productivity of the vibrating granulator 5 can be improved, and the practical effect thereof is great.

[0044]

As described above, according to the present invention, the raw material is uniformly and stably distributed in a continuous constant amount throughout the raw material charging area of the vibrating granulator, so that It is possible to efficiently and uniformly produce a uniform and granular product.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a vibrating granulator equipped with a raw material distribution and supply device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part of FIG.

FIG. 3 is a schematic view showing a trough-shaped container and a raw material scattering prevention rectifying plate.

FIG. 4 is a schematic view showing a tilt angle adjusting device for a raw material distribution plate.

FIG. 5 is a schematic diagram showing an example of a mounting structure of a raw material distribution plate in a three-stage trough.

FIG. 6 is a schematic view showing an example of a mounting structure on a raw material distribution plate in a four-stage trough.

FIG. 7 is a schematic diagram showing an example of a mounting structure of a raw material distribution plate in a 5-tier trough.

FIG. 8 is a schematic diagram showing an example of a mounting structure of a raw material distribution plate in a 5-tier trough.

FIG. 9 is a sintering process diagram to which the present invention is applied.

FIG. 10 is a schematic view showing an example of a stirring mixer.

FIG. 11 is a schematic diagram showing an example of a vibrating granulator.

FIG. 12 is a schematic view showing a conventional raw material supply device.

[Explanation of symbols]

 5 Vibratory Granulator 35 Container 35A Raw Material Injecting Section 50 Raw Material Distributing and Supplying Device 52 Raw Material Scattering Prevention Rectifier Plates 53A, 53B Raw Material Distributing Plate

Claims (1)

[Claims] 1. Vibratory granulation in which a wet raw material is introduced into a plurality of trough-shaped containers arranged in multiple stages, circular vibration is applied in a direction along the discharge direction of the raw material, and the raw material is rolling-lumped to obtain a mini pet. In the raw material distribution and supply device of the machine, a raw material scattering prevention rectifying plate is provided above the raw material input part of all trough-shaped containers, and a raw material distribution plate is attached to the raw material input part of each trough-shaped container. A raw material distribution and supply device for a vibrating granulator, which can adjust the inclination angle with respect to the raw material falling direction and can vibrate integrally with each trough-shaped container.