JPH05168898A - 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:In a device for distributing and supplying a raw material in a vibrating granulator 5, the discharge port 26 of an agitating mixer 4 is opened in the direction oblique for the proceeding direction of the raw material in the agitating mixer 4. The discharge port 26 is set so as to intersect each of a plurality of introduction ports for the raw material in a granulating vessel 35 one part by one part.

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
It has a structure in which a plurality of trough-shaped containers 4 stacked on top of each other are closely arranged in parallel in the vertical 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 vertically arranged containers 4.
Stable and stable distribution and supply of a continuous, constant amount is an indispensable condition for efficiently producing a uniform granular product having a uniform particle size in 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 as set forth in claim 1, wherein the wet raw material discharged from the raw material discharge port of the raw material feeder is granulated in parallel along the raw material advancing direction of the raw material feeder. Distributing and supplying to each of a plurality of raw material charging ports of the container, imparting circular vibration in a direction along the discharging direction of the raw material,
A raw material distribution and supply device of a vibrating granulator for rolling agglomeration of the raw material to obtain mini-pellets, wherein a raw material discharge port of the raw material supply device is opened in an oblique direction with respect to a raw material advancing direction of the raw material supply device, The granulation container is set so as to partially intersect with each of the plurality of raw material input ports.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, a spiral blade shaft is installed at the raw material discharge port, and a rotary drive device for the blade shaft is provided.
The rotation direction of the upper half of the blade shaft is opposite to the raw material advancing direction of the raw material feeder.

[0014]

[Function] A plurality of raw material charging ports A ₁ to be provided in the granulation container
When each A ₄ is juxtaposed along the raw material advancing direction of the raw material feeder, for example, in the range A of FIG. 9 (A), the raw material is evenly distributed to the raw material input ports A _{1 to} A _4. In order to do so, it is necessary to diffuse and supply the raw material to the entire range A.

Therefore, the raw material discharge port of the raw material feeder is shown in FIG.
As shown in (B), when the opening is made in an oblique direction with respect to the raw material advancing direction of the raw material feeder and the setting is made so as to partially intersect each of the plurality of raw material input ports of the granulation container, the opening of the discharge port is performed. With a simple configuration in which only the morphology is set, the raw materials can be diffused and supplied to the entire range of the plurality of raw material input ports A _{1 to} A ₄ of the granulator.

In each of the raw material inlets A _{1 to} A ₄ of the granulation container, the raw material is unevenly distributed in each of partial areas where the raw material outlets overlap each other as shown in FIG. 9C. Supplied. However, the raw material that is unevenly distributed and supplied to the granulator is widened to the container width B by the vibration of the granulation container during the granulation process, so that no inconvenience occurs.

That is, according to the present invention, the raw material can be stably distributed uniformly and continuously in a constant amount throughout the plurality of raw material inlets of the vibrating granulator.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 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, and FIG.
FIG. 3 is a schematic view showing a raw material discharge port of the stirring mixer of FIG. 1, FIG. 4 is a schematic view showing a modified example of the raw material discharge port of the stirring mixer, and FIG. FIG. 6 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. 9 is a schematic view showing the action of the present invention.

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 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 the trough-shaped containers 35 loaded on the two eccentric shafts 33 and 34 that are rotationally driven in the vertical direction are arranged side by side in close contact with each other in a plurality of stages in the vertical 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 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.

In this embodiment, however, the containers 35 of the vibrating granulator 5 are arranged in a multi-stage state as described above, and their raw material charging parts 35A are arranged in the raw material advancing direction of the agitating mixer 4. Are juxtaposed alongside. Therefore, the stirring mixer 4
The raw material discharge port 26 of the stirring mixer 4 is set as follows in order to uniformly supply the wet raw material stirred and mixed by the above to each raw material charging part 35A of the vibrating granulator 5.

That is, the raw material discharge port 26 of the stirring mixer 4 is
The stirring mixer 4 is opened in an oblique direction with respect to the raw material advancing direction (see FIG. 3), and is set so as to partially intersect each of the plurality of raw material feeding parts 35 A of the container 35 (FIG. 9).
(See (B)).

The raw material discharge port 26 is provided with a spiral blade shaft 101 and a rotary drive motor 102 for the blade shaft 101. The rotation direction of the upper half of the blade shaft 101 is set to the opposite direction to the raw material advancing direction of the stirring and mixing machine 4.

In the practice of the present invention, the stirring mixer 4
The raw material discharge port 26 may be formed in a triangular shape as shown in FIG. 4 and opened in an oblique direction with respect to the raw material advancing direction of the stirring and mixing machine 4. Further, the raw material discharge port 26 does not necessarily have to include the blade shaft 101.

The operation of this embodiment will be described below. As shown in FIG. 9 (B), the raw material discharge port 26 of the stirrer mixer 4 is opened obliquely with respect to the raw material advancing direction of the stirrer mixer 4, and a part of each of the plurality of raw material input parts 35A of the container 35 is provided. It was set to intersect. Therefore, the outlet 2
A range A in which the plurality of raw material charging parts 35A of the vibrating granulator 5 are arranged side by side with a simple configuration in which only the opening mode of 6 is set.
The raw material can be diffused and supplied to the whole area.

In each of the raw material charging parts 35A of the container 35, the raw material is discharged as shown in FIG. 9 (C).
Are unevenly distributed and supplied in each of partial areas overlapping with each other. However, the raw material that is unevenly distributed and supplied to the granulator 5 is widened to the container width B by the vibration of the container 35 during the granulation process, so that no inconvenience occurs.

That is, the raw material can be stably distributed evenly and continuously over the entire area of the plurality of raw material charging sections 35A of the vibrating granulator 5 in a constant amount.

As described above, the raw material distribution and supply device according to the present invention can stably and uniformly distribute the raw material to a wide range (a plurality of raw material charging sections 35A) of the raw material charging region of the vibrating granulator 5. The performance and productivity of the vibrating granulator 5 can be improved, and the practical effects thereof are great.

[0034]

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 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 view taken along the line II-II in FIG.

FIG. 3 is a schematic view showing a raw material discharge port of the stirring mixer of FIG.

FIG. 4 is a schematic view showing a modified example of a raw material discharge port of a stirring mixer.

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.

FIG. 9 is a schematic view showing the action of the present invention.

[Explanation of symbols]

 4 Stirrer / mixer (raw material feeder) 5 Vibratory granulator 26 Raw material discharge port 35 Granulation container 35A Raw material input port 101 Spiral blade shaft 102 Rotation drive motor (rotation drive device)

Claims (2)

[Claims] 1. A wet raw material discharged from a raw material discharge port of a raw material feeder is distributed and supplied to each of a plurality of raw material input ports of a granulation container arranged in parallel along the raw material advancing direction of the raw material feeder, A raw material distribution and supply device of a vibrating granulator that imparts circular vibration in a direction along the discharge direction of the raw material, and roll-agglomerates the raw material to obtain mini-pellets, wherein the raw material discharge port of the raw material supply machine is A raw material for a vibrating granulator, which is opened in an oblique direction with respect to the raw material advancing direction of the raw material feeder and is set so as to partially intersect each of the plurality of raw material charging ports of the granulating container. Distribution and feeding device. 2. A spiral blade shaft is installed at the raw material discharge port, a rotary drive device for the blade shaft is provided, and the rotation direction of the upper half of the blade shaft is opposite to the raw material advancing direction of the raw material feeder. The raw material distribution and supply device of the vibrating granulator according to claim 1, which is directed.