JPH05168899A - Device for distributing and supplying raw material in vibrating granulator - Google Patents

Abstract

PURPOSE:To efficiently mass-produce a granular product which is uniform in grain diameter and homogeneous. CONSTITUTION:A device 50 for distributing and supplying a raw material in a vibrating granulator 5 is constituted by providing both a belt conveyor 51 for carrying and introducing the wet raw material and a hopper 52 which is arranged in the going side of the velt conveyor 51 and capable of being rocked on the raw material introducing region of a vessel 35. Further, two pieces of belt conveyors 61, 61 for carrying out the raw material are oppositely arranged on the inside surface of the hopper 52. The interval between the descending parts 61A, 61A transferring toward the lower parts of both conveyors 61, 61 is narrowed toward the lower parts thereof.

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. 6, a raw material feeding portion 1 at one end and a raw material discharging portion 2 at the other end. 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. In order to efficiently produce a uniform granular product having a uniform particle size in an efficient manner, it is indispensable to stably supply and supply a continuous and substantially constant 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 conventional feeding device 6 shown in FIG. 7, in which the storage portion 5 becomes narrower toward the bottom, a so-called hopper is used.
When the raw material charged from the upper part of this is taken out from the lower part of it, the raw material easily adheres to the wall surface 7, and the fluidity of the raw material is poor, so that a bridge is formed as shown in the figure. Then it becomes blocked and 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 raw material charging area of the vibrating granulator in a continuous and substantially constant amount. 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 container, circular vibration is applied in a direction along the discharge direction of the raw material, and the raw material is tumbled and agglomerated to obtain mini-pellets. A raw material distribution and supply device of a granulator, a raw material carry-in belt conveyor that conveys a wet raw material, and a hopper that is arranged on the exit side of the raw material carry-in belt conveyor and that can swing on the raw material input area of the container. The inner surface of the hopper is provided with two belt conveyors for carrying out raw materials so as to face each other, and the distance between the descending parts moving downward of both conveyors is made smaller toward the lower side. It is the one.

[0013]

The hopper swings on the raw material charging area of the container of the vibrating granulator when distributing and supplying the wet raw material carried in from the raw material carrying conveyor, and distributes the raw material throughout the raw material charging area. .. The raw material distributed from the hopper is sandwiched between the descending portions of the two raw material carrying-out belt conveyors on the inner surface of the hopper, and is positively discharged at a constant flow rate. Therefore, the raw material is stably and uniformly supplied to the entire raw material charging area in a uniform and continuous amount.

[0014]

1 is a side 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 front view of FIG. 1, and FIG. 3 is a III-III line of FIG. FIG. 4 is a schematic view showing an example of a stirring mixer, FIG. 6 is a schematic view showing an example of a vibrating granulator, and FIG. 7 is a schematic view showing an example of a vibrating granulator. It is a schematic diagram which shows the conventional raw material supply apparatus.

In the sintering process for the DL type sintering machine using the method of the present invention, as shown in FIG. 4, 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 while being repeatedly given a rotation motion, it is phased to the side of the raw material discharge part 35B, 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 and 2 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 the raw material carrying conveyor 5 is provided.
1 and a hopper 52.

The raw material carrying conveyer 51 feeds the wet raw material supplied from the raw material discharge port 26 of the agitating mixer 4 to the hopper 52.
Transport it to.

The hopper 52 is hung and supported by bearings 54, 54 on a pedestal 53 via pins 55 on the exit side of the raw material carry-in conveyor 51, and the entire area of the raw material charging section 35A of the container 35 of the vibration granulator 5 is covered. It can rock up. The swing device 56 of the hopper 52 includes a motor 57 fixed to the pedestal 53,
It is composed of a crank device 58 driven by a motor 57.

On the inner surface of the hopper 52, two raw material unloading belt conveyors 61, 61 are arranged so as to face each other, and the descending parts 61A, 61A which move toward the lower side of both raw material unloading belt conveyors 61, 61. The interval is set to be gradually smaller (narrower) downward. 62 is a conveyor drive motor. 63 is a shoot.

In the distribution and supply device 50, the proper raw material is ignited by the agitation mixer 4 and the uniformly mixed wet raw material is supplied from the raw material discharge port 26 to the raw material carrying conveyor 51. This raw material is stored in the raw material charging section 35A of the container 35.
Is conveyed into the hopper 52 that swings above the entire area of the hopper 52, and the raw material unloading belt conveyors 61, 61 facing the hopper 52 are conveyed.
While being sandwiched between them, it is distributed throughout the raw material charging section 35A.

The operation of this embodiment will be described below.
The hopper 52 distributes and supplies the wet raw material carried in from the raw material carrying-in conveyor 51, and the container 3 of the vibrating granulator 5
The raw material is distributed over the entire raw material charging area by rocking on the raw material charging area 5. The raw material distributed from the hopper 52 is sandwiched between the two raw material unloading belt conveyors 61, 61 on the inner surface of the hopper 52 and is positively discharged at a constant flow rate. Therefore, the raw material is stably distributed evenly and continuously in a constant amount throughout the raw material charging area.

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.

[0030]

As described above, according to the present invention, it is possible to stably and uniformly distribute and feed the raw material to the entire area of the raw material charging area of the vibrating granulator so that the particle size can be improved. It is possible to efficiently and uniformly produce a uniform granular product with uniform production.

[Brief description of drawings]

FIG. 1 is a side view 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 front view of FIG.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is a sintering process diagram to which the present invention is applied.

FIG. 5 is a schematic diagram showing an example of a stirring mixer.

FIG. 6 is a schematic diagram showing an example of a vibrating granulator.

FIG. 7 is a schematic view showing a conventional raw material supply device.

[Explanation of symbols]

 5 Vibratory Granulator 35 Container 35A Raw Material Feeding Section 50 Raw Material Distributing and Supplying Device 51 Raw Material Carrying Conveyor 52 Hopper 61 Raw Material Carrying Out Belt Conveyor 61A Descending Part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Suemori ▲ Akira ▼ 1-chome, Mizushima Kawasaki-dori, Kurashiki-shi, Okayama Prefecture (no address) Inside the Mizushima Steel Works, Kawasaki Steel Co., Ltd. Tsudori 1-chome (No house number) Kawasaki Steel Co., Ltd. Mizushima Works

Claims (1)

[Claims] 1. A raw material distribution and supply device of a vibrating granulator which introduces a wet raw material into a container, imparts circular vibration in a direction along the discharge direction of the raw material, and roll-agglomerates the raw material to obtain mini pellets. There is a raw material carry-in belt conveyor that conveys a wet raw material, and is configured to have a hopper that is arranged on the exit side of the raw material carry-in belt conveyor and that can swing in the raw material charging area of the container, On the inner surface of the hopper, two belt conveyors for carrying out raw materials are arranged so as to oppose each other, and the distance between the descending parts moving downward of both conveyors is made smaller toward the lower side. Raw material distribution and supply device.