JPH05168897A - 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 by distributing and supplying a raw material uniformly, continuously and stably at specified amount. CONSTITUTION:A wet raw material is introduced into the vessel 35 of a vibrating granulator 5. Circular vibration is imparted 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, the descending parts 51A, 52A, wherein a first belt conveyor 51 and a second belt conveyor 52 are moved downward, are parallel arranged by holding the interval. While the wet raw material is pinched between the descending parts 51A, 52A of both conveyors 51, 52, the raw material is distributed into the vessel 35 of the vibrating granulator 5.

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. 7, 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 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 called a hopper as shown in FIG. 8 in which the storage portion 5 becomes narrower toward the bottom,
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 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]

The present invention according to claim 1 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. A raw material distribution and supply device for a vibrating granulator to obtain mini-pellets, in which descending parts moving downward toward both conveyors of a first belt conveyor and a second belt conveyor are juxtaposed at a distance, and descending parts of both conveyors are arranged. Each of the raw materials is distributed to the container of the vibrating granulator while sandwiching the wet raw material therebetween.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, the first belt conveyor is provided with a horizontal traverse portion intermediate the upstream raw material introducing portion and the descending portion on the conveyor surface. In addition to providing a scraper that can cut excess raw material so that the width and layer thickness of the raw material can be made constant, a raw material sensor that detects the amount of raw material cut by the scraper is provided, and the raw material detected by the raw material sensor is cut. A control circuit for controlling the conveyor speed to increase or decrease according to the increase or decrease of the amount is provided.

According to a third aspect of the present invention, in addition to the first or second aspect of the present invention, the raw material is discharged from the container in the descending portion of both the first belt conveyor and the second belt conveyor. It is configured such that it can be adjusted and moved in a direction orthogonal to the direction.

[0015]

According to the present invention, the following effects are obtained. Both the first and second conveyors positively discharge the wet raw material at a constant flow rate by sandwiching the wet raw material between the descending portions, and as a result, the raw material is uniformly and stably distributed and supplied in a constant continuous amount. To do.

The raw material introduced onto the first belt conveyer is widened to a desired width by a scraper, and the width and layer thickness are kept constant, and the raw material is fed between the descending portions of both the first conveyer and the second conveyer. Be transferred. Then, the control circuit controls the conveyor speed to increase or decrease according to the increase or decrease of the raw material cut amount by the raw material sensor, so that the width and the layer thickness of the raw material on the first belt conveyor are more reliably made constant. This makes it possible to improve the above-mentioned stabilizing effect on the distribution of the raw materials.

If the falling position of the raw material discharged from between the descending portions of the first and second conveyors is displaced due to fluctuations in the amount of introduced raw material during operation, the descending portions of both conveyors are adjusted and moved. This maintains an even distribution of the container of the vibrating granulator.

[0018]

1 is a front 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 side view of FIG. 1, FIG. 3 is a plan view of FIG. 4 is a view taken along the line VI-VI of FIG. 1, and FIG. 5 is a sintering process diagram to which the present invention is applied.
Is a schematic diagram showing an example of a stirring mixer, FIG. 7 is a schematic diagram showing an example of a vibrating granulator, and FIG. 8 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. 5, 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 portion 35A at one end and a raw material discharging portion 35B at the other end, and two arrows arranged in a horizontal plane and having the same phase and the same amplitude are 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 above-mentioned eccentric shafts 33 and 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 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 disposed between the agitating mixer 4 and the vibrating granulator 5 and has a flat belt, a first belt conveyor 51 and a second belt conveyor 52. There is.

The first belt conveyor 51 has a descending portion 51A which moves downward and a traverse portion 5 which has a horizontal or upward slope.
1B and. The second belt conveyor 52 has a descending portion 52A that moves downward. The descending portions 51A and 52A of both the conveyors 51 and 52 are arranged in parallel at intervals.

The first belt conveyor 51 is provided with a raw material introduction section 51 from the stirring mixer 4 on the upstream side of the traverse section 51B.
The skirt 53 surrounds both sides of the raw material introducing portion 51C, the transverse portion 51B, and the descending portion 51A. Thereby, the raw material introduced from the stirring mixer 4 to the raw material introducing portion 51C of the first belt conveyor 51 passes through the traverse portion 51B while being regulated by the skirt 53, and further, the descending portion 51A of both conveyors 51 and 52, While being sandwiched between the 52A, it is dropped into the raw material charging section 35A of the container 35.

At this time, the lower end pulleys 54, 55 of the descending parts 51A, 52A of both conveyors 51, 52 are mounted on the carriage 56 via bearings 54A, 55A. Trolley 5
The wheels 57 of No. 6 are movably installed on traveling rails 58 extending in the direction orthogonal to the raw material discharge direction on both sides above the raw material feeding portion 35A of the container 35. Trolley 5
A jack device 59 with a handle is connected to the jack 6, and the jack device 59 enables the trolley 56 to move along the traveling rail 58, and by extension, the descending part 5 of both conveyors 51, 52.
1A and 52A can be adjusted and moved in a direction orthogonal to the material discharge direction of the container 35.

A chute 61, which opens into the raw material charging section 35A of the container 35, is suspended from the trolley 56.
Inside the chute 61, a distribution plate 6 that divides the raw materials transferred by the descending portions 51A and 52A of both conveyors 51 and 52 into two in a direction orthogonal to the raw material discharge direction of the container 35.
Two are provided.

It should be noted that both conveyors 5 are mounted on the carriage 56.
A motor 63 for driving the lower end pulleys 54, 55 of the motors 1, 52, a chain 64, and a bevel gear train 65 are mounted.

The width (B) and the layer thickness (H) of the raw material on the conveyor 51 are provided on the transverse portion 51B of the first group conveyor 51.
A raw material widening scraper 71 capable of cutting the excess raw material is provided so as to keep constant. Further, a raw material sensor 72 that detects the amount of raw material that is cut by the scraper 71 and stays on the upstream side of the scraper 71 is provided,
A control circuit 73 is provided for increasing / decreasing the conveyor speed according to the upper limit of the amount of raw material detected by the sensor 72.
The control circuit 73 increases the conveyor speed when the cut amount is large and slows the conveyor speed when the cut amount is small. As a result, the raw material can always be supplied with a constant width (B) and layer thickness (H). is there.

Next, the operation of the raw material distribution and supply device 50 will be described. (1) The wet raw material, to which appropriate water has been added by the stirrer mixer 4 and which has been uniformly mixed, is introduced from the raw material outlet 26 into the raw material introducing section 51C of the first belt conveyor 51. This raw material is spread on the transverse portion 51B of the first belt conveyor 51 by the scraper 71 to a desired width (B) and cut into a constant layer thickness (H).
After passing between the descending parts 51A and 51B of 1, 52, shoot 6
The one distribution plate 62 evenly distributes the raw material charging portion 35A of the container 35 to both sides in the width direction.

(2) When the falling position of the raw material discharged between the descending parts 51A and 52A of both conveyors 51 and 52 is displaced due to the fluctuation of the raw material supply amount or the like, the truck 56 is operated by operating the jack device 59. By adjusting the fine movement, the raw material is evenly distributed to both sides in the width direction of the raw material feeding portion 35A of the container 35.

(3) When the cut amount by the scraper 71 changes due to the fluctuation of the raw material supply amount, the raw material sensor 7
The cut amount is detected by 2 and the speed of the first belt conveyor 51 is controlled by the proportional control by the control circuit 73. Thereby, the raw material is always supplied with a constant width (B) and layer thickness (H).

The operation of this embodiment will be described below. Both the first and second conveyors 51 and 52 positively discharge the wet raw material at a constant flow rate by sandwiching the wet raw material between the descending portions 51A and 52A, and as a result, the raw material is evenly and continuously fed by a constant amount. Stable distribution with.

The raw material introduced onto the first belt conveyor 51 is widened to a desired width by the scraper 71, and the width and the layer thickness are made constant, so that the first and second conveyors 51 and 52 are both provided. Is transferred between the descending portions 51A and 52A. Then, the control circuit 73 controls the conveyor speed to increase or decrease according to the increase or decrease of the raw material cut amount by the raw material sensor 72, so that the width and the layer thickness of the raw material on the first belt conveyor 51 can be more reliably made constant. .. This makes it possible to improve the above-mentioned stabilizing effect on the distribution of the raw materials.

When the falling position of the raw material discharged between the descending portions 51A and 52A of the first and second conveyors 51 and 52 is deviated due to the fluctuation of the raw material introduction amount during the operation, etc. By adjusting and moving the descending portions 51A, 52A of the nozzles 52, 52, the even distribution of the vibration granulator 5 to the container 35 is maintained.

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.

[0041]

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 front 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 side view of FIG.

FIG. 3 is a plan view of FIG. 1.

FIG. 4 is a view taken along the line VI-VI in FIG.

FIG. 5 is a sintering process diagram to which the present invention is applied.

FIG. 6 is a schematic view showing an example of a stirring mixer.

FIG. 7 is a schematic diagram showing an example of a vibrating granulator.

FIG. 8 is a schematic view showing a conventional raw material supply device.

[Explanation of symbols]

 5 Vibratory Granulator 35 Container 50 Raw Material Distributing and Supplying Device 51 First Belt Conveyor 51A Descending Part 51B Traverse Part 51C Raw Material Introducing Part 52 Second Belt Conveyor 52A Descending Part

Claims (3)

[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. Therefore, the descending parts moving downward of both the first belt conveyor and the second belt conveyor are juxtaposed at intervals, and the wet raw materials are sandwiched between the descending parts of both conveyors, and each raw material is vibrated and granulated. A raw material distribution and supply device for a vibrating granulator. 2. A surplus raw material can be cut at a transverse portion midway between the upstream raw material introducing portion and the descending portion of the first belt conveyor so that the width and layer thickness of the raw material on the conveyor surface can be made constant. And a scraper provided with a raw material sensor that detects the amount of raw material cut by the scraper, and a control circuit that controls the conveyor speed to increase or decrease according to the increase or decrease of the raw material cut amount detected by the raw material sensor. Item 1. A raw material distribution and supply device for a vibrating granulator according to Item 1. 3. The vibrating granulation according to claim 1, wherein the descending portions of both the first belt conveyor and the second belt conveyor can be adjusted and moved in a direction orthogonal to the discharge direction of the raw material in the container. Raw material distribution and supply device.