JPH06107328A - Lump removing device for powdery/granular material - Google Patents

Abstract

PURPOSE:To securely and stably remove the lumps that are mixed in a powdery/ granular material, in the process the powdery/granular material such as iron ore and lime stone is transported by a belt conveyor. CONSTITUTION:A comblike lump removing bar 2 whose one end is fixed to a turnable shaft and the other end is open is provided in the connection part of a belt conveyor 1 for transporting a powdery/granular material so as to be faced toward the position where it is struck by the flow of the material, and also a second shaft is turnably provided so as to be parallel to the bar 2 and in the vicinity thereof, and further the second shaft is fixedly provided with a large number of brushing-off bars 4 that are capable of being passed between the respective teeth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lump removing device for powdery granular materials.

[0002]

2. Description of the Related Art In a process of transporting a powdery granular material such as powdered iron ore stone, limestone powder (hereinafter collectively referred to as powdered raw material) at a steel mill or the like by a belt conveyor, the powdered raw material has a shape different from that of the powdered raw material. Large lumps, iron scraps, etc. (hereinafter collectively referred to as lumps) are often mixed.

The lumps mixed in the powder raw material are caught on the chute portion of the transfer section of the belt conveyor, and when the powder raw material is cut out from the hopper at the transportation destination when the belt is cut or the powder hopper is cut out from the hopper at the destination, the cutout gate portion is clogged, and the cutout is uncut. It had the problem of becoming stable. In particular, when a lump is clogged at the cutting gate part of the drum feeder in the insertion part of the sintering machine, the raw material mixture is not cut out from the clogged part, so a groove is created on the pallet into which the raw material mixture is inserted. I will end up. As a result, firing in the width direction of the pallet becomes unstable, resulting in deterioration of the sintering yield and quality of the sintered ore.

Therefore, in the process of transporting the powder raw material,
The advent of an apparatus capable of reliably and stably removing a lump in a powder raw material is desired. As one of the devices, the lump removing device shown in FIG. 6 is generally used. At the tip of the belt conveyor 1, a fixed lump collecting bar 2A is installed, and the transported lump 3 is taken out by this,
This is a device for discharging the lump 3 out of the system via the lump recovery chute 8 (see Japanese Utility Model Laid-Open No. 59-176828).

[0005]

By the way, in this apparatus, since the lump collecting bar 2A is fixedly installed,
Frequently, the gap between the gathering bars 2A frequently closes immediately after the raw material adheres to the surroundings of the gathering bars 2A or the chunks 3 are clogged in the gaps between the gathering bars 2A. In some cases, the tip of the conveyor 1 was filled with the powdered raw material that had been transported, making it impossible to transport it.

Therefore, it is difficult for the operator to perform inspection and cleaning frequently, and it is difficult to apply it to places where constant transportation is required. Further, in order to solve the problem that the gap between the lump collecting bars 2A is blocked by the powder material, the gap between the lump collecting bars 2A is inevitably made large, and as a result, the originally desired lump removing function is achieved. It was difficult to satisfy.

The present invention has been made in order to advantageously solve the above-mentioned problems of the prior art, and in the step of transporting powdered raw materials such as powdered iron ore stone, limestone powder, etc., it is mixed in the powdered raw materials. Stable removal of lumps in powdered raw materials by surely eliminating the adhesion of raw materials to the lump-taker bar installed to remove existing lumps and the blockage of lump-taker bars caused by blockages caused by raw materials. The purpose is to do.

[0008]

SUMMARY OF THE INVENTION The gist of the present invention is to fix one end to a rotatable shaft and open the other end to a connecting portion of a belt conveyor for transporting powdered and granular materials such as iron ore and limestone. A comb-tooth-like lump-collecting bar is provided at a position corresponding to the flow of the raw material, and a second shaft is rotatably installed in parallel with and near the axis. A lump removing device for powdery or granular raw material, comprising a large number of blow-off bars that are fixed between the teeth of the lump collecting bar.

[0009]

1 and 2 are a cross-sectional view and a plan view of a main part of the present invention as seen from the side. In the present invention,
The lumps 3 contained in the powder raw material 11 transported by the belt conveyor 1 are received by the lump collecting bar 2 installed at the tip of the belt conveyor 1. At that time, the transported powder material 11 passes through the lump collecting bar 2 and is discharged to the next belt conveyor.

Next, after a certain amount of time has passed, when the lumps 3 are collected in the lump collecting bar 2, the lump collecting bar 2 is rotated upward by the rotary cylinder 5 for driving the lump collecting bar 2.
Rotate to and stop at the top (indicated by the dotted line).

Subsequently, the lumps 3 stuck to the lump collecting bar 2 stopped at the uppermost portion and the adhering powdery materials are removed by removing the dropping bar 4 and rotating downward by the bar driving cylinder 6 to collect the lumps. It is discharged to the chute 8. Here, the disposing bar 4 is installed in the width direction at the lump collecting bar 2
It is installed so as to be able to pass through the space between them, and by passing the scraping bar 4 between the chunk collecting bars 2, the clogged mass 3 and the adhering powder material are surely discharged.

The pitch of the lump collecting bar 2 according to the present invention is usually set in the range of 100 to 300 mm, but it should be determined in consideration of the size of the lump mixed in the powder raw material.
Also, the inclination of the lump collecting bar 2 should be set horizontally so that the accumulated lumps do not escape to the next conveyor, or the belt conveyor side should be set higher than that.

Since the portion of the lump removing bar 2 which receives the powder raw material receives a large amount of the powder raw material, a wear-resistant material such as ceramic should be used in consideration of wear.
In addition, in the configuration of the present invention, the lump 3 and the powder raw material are the lump collecting bars 2.
It is unlikely that the powder raw material is blocked in the gap of No. 1 and the powder raw material is deposited on the lump collecting bar 2, but the shoot full tank detector 10 is installed above the lump collecting bar 2 in consideration of the emergency. ,
It is desirable to arrange the sequence so that the powder material is deposited by the detector 10.

The details of the flow of operation of the lump collecting bar 2 and the scraping bar 4 will be described below with reference to FIGS. 3 and 4. Figure 3
FIG. 4 is a diagram showing the flow of operations of the lump catch bar 2 and the dispelling bar 4, and FIG. 4 is a time chart diagram of the flow of operations of the lump catch bar 2 and the dispenser bar 4. The operation is shown in FIGS.
Both are performed in the order of A, B, C, and D.

First, in A, the lump collecting bar 2 is arranged in the lump 3
It is in a position to receive the bar, and the dislodging bar 4 rises from the lowermost position 4A in preparation for the next stage, and the uppermost position 4A.
Stop at B. In this embodiment, the rising time of the drop-off bar 4 is about 5 seconds.

Subsequently, in B, the lump collecting bar 2 is clogged with the lumps 3 to some extent, or is rotated upward while the powder material is attached. In this embodiment, the time required for this ascending rotation is about 10 seconds.

In C, the blow-off bar 4 is rotated downward to remove the lumps clogged in the gaps of the lump-taker bar 2 and the adhered powder raw material, and discharge them to the outside of the system. The time required for this rotation is about 5 seconds in this embodiment.

In D, while the lump collecting bar 2 is cleanly cleaned, the lump collecting bar 2 is rotated downward and returned to the steady lowermost position. In this embodiment, the time required for this downward rotation is about 10 seconds. Hereinafter, similarly, A, B, C, D
The above operation is repeated, but the time during which the normal lump collecting bar 2 from D to A receives the powder raw material is about 5 to 10 minutes.

According to the present invention, the time during which the normal lump collecting bar 2 from D to A receives the powder raw material, the mixing ratio of the lump 3 of the powder raw material being transported, the powder raw material to the lump collecting bar 2 It should be determined as appropriate depending on the degree of adhesion of the particles, and it is desirable to be able to make adjustments with a timer in practice.

[0020]

As described above, according to the present invention, the adherence of the powder raw material to the lump-taker bar and the clogging of the lump-taker bar due to the clogging of the lump-eliminating bar are eliminated, and the lump in the raw material is stably and reliably removed. It As a result, the problem that the lump gets caught in the transfer section of the belt conveyor, cuts the belt, and cuts the powder raw material from the hopper at the destination is clogged with the cutting gate section and the cutting becomes unstable is solved. it can.

[Brief description of drawings]

FIG. 1 is a side view showing a lump removing device of the present invention.

FIG. 2 is a cross-sectional view illustrating a lump removing device of the present invention.

FIG. 3 is a side view for explaining the operations of the lump removing bar and the discharging bar of the lump removing device according to the embodiment of the present invention.

FIG. 4 is a time chart diagram for explaining the temporal operations of the lump removing bar and the discharging bar of the lump removing device according to the embodiment of the present invention.

FIG. 5 is a diagram showing the relationship between the number of lumps collected at the charging hopper gate part and the sintering yield before and after the lump removing device according to the embodiment of the present invention is installed in the raw material transportation step of the sintering machine. .

FIG. 6 is a side view illustrating a conventional lump removing device.

[Explanation of symbols]

 1 Belt conveyor 2 Lump bar 3 Lump 4 Discharge bar

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Takahashi 1 Kimitsu, Kimitsu-shi, Chiba Nippon Steel Corporation Stock of Kimitsu Steel Co., Ltd.

Claims (1)

[Claims] 1. A comb-tooth-shaped lump-collecting bar having one end fixed to a rotatable shaft and the other end open at a connecting portion of a belt conveyor for transporting powdered and granular raw materials such as steel or limestone. A second shaft is rotatably provided in a position corresponding to the flow of the raw material in parallel with and in the vicinity of the shaft, and a space between the teeth of the clustering bar is provided on the second shaft. An apparatus for removing lumps of powdery granular material, characterized in that a large number of passing-through bar are fixedly installed.