JPH0718650B2 - Sinter ore feeder - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sintering ore feeding device, and more particularly to a sinter ore feeding device for forming a raw material charging layer suitable for operation on a pallet.

[Conventional technology]

Generally, in order to make the quality of the sintered ore in the height direction of the sintered bed layer uniform, improve the air permeability of the charging layer, and improve the lump retention, the raw materials to be charged into the pallet are loaded from various experimental effects. , A segregation charge in which the grain size is fine in the upper layer and a large amount of coke is distributed, and the lower layer is a coarse grain and a small amount of coke is distributed, and a belt that receives falling compounding materials midway and guides downward It is said that it is good to use a device such as a shoe or iron plate chute that lowers the charging height of raw materials to achieve low-density charging.As a concrete measure for this, the following devices have been proposed. There is.

(A) A device that blows air from a direction perpendicular to the trajectory of the raw material while it is falling to achieve low-density charging (Actual Development Sho 49
-19005).

(B) Roller chute device
Four).

(C) Device with screen bar chute (Actual exploitation 49-
39805).

(D) Device using a screen chute (Actual exploitation 51-5810
3).

(E) Means using an iron plate chute.

(F) Belt chute device
0). As shown in FIG. 6, this device comprises a feed hopper 1, a drum feeder 2, a belt chute 3, a pallet 4, a sprocket 5, a layer thickness adjusting device 6, and a raw material 7. The belt chute 3 is arranged below the drum feeder 2 so as to block the raw material falling path and to be steeply inclined with respect to the surface of the pallet 4, and the transfer direction of the belt 8 is opposite to the raw material falling direction. .

[Problems to be solved by the invention]

Various devices as described above have been proposed in order to make the quality of the sinter uniform, improve the air permeability of the charging layer, and improve the lump retention. However, the above-mentioned conventional technique has the following problems. That is, in the device for spraying air of (a), since a large amount of attached water makes it difficult to separate fine particles and coarse particles due to agglomeration of particles, the segregation charging effect is low, and the device using a roller chute of (b), In both the device with the screen bar chute of c) and the device with the screen chute of (d), the clogging of the raw material occurs in the slit portion and it becomes difficult to screen the raw material, so the segregation charging effect is low and the adhesion It takes a lot of time to perform maintenance work such as removal of raw materials and measures for screen abrasion. Further, in the means (e) using the iron plate chute, the chute is installed at an angle of the repose angle (50 ° to 60 °) or more of the raw material in order to prevent the raw material from being deposited on the chute. The segregation effect is low because the effect of lowering the falling speed due to the reduction is small, the charging density is high, and the shoot length is short and the rolling distance of the raw material necessary for particle size segregation cannot be sufficiently obtained. As shown in FIG. 6, the belt chute device (f) has a belt chute 3 steeply inclined with respect to the surface of the pallet 4, because the belt 8 is conveyed in the direction opposite to the falling direction of the raw material 7. Although it is effective in eliminating the inconvenience associated with the above, the drop impact is strong, and the same problems as those of the above-described means (e) by the iron plate chute remain.

The present invention solves the above-mentioned problems and provides a sintering ore feeding apparatus capable of ideally charging raw materials onto a pallet.

[Means for solving problems]

The present invention aims to solve the above-mentioned problems of the prior art, and adopts the following technical means. That is, a sieving machine having the following structure was arranged between the ore feeding hopper and the pallet.

(1) The material transfer direction is opposite to the pallet transfer direction.

(2) It is installed at a downward slope with respect to the material transfer direction.

(3) The sieving machine is composed of two frames having a plurality of horizontal bars, and the bars of each frame are arranged so as to be alternately arranged side by side. It is configured to be movable. An elastic net whose mesh size was increased stepwise from the upstream side to the downstream side was continuously stretched between the crosspieces.

(4) A crank mechanism is provided at one end of each frame to reciprocate the frames in opposite directions to give the elastic net a cyclic tension and relaxation state.

[Action]

The point of idea of the present invention is to provide a reciprocating mechanism for imparting periodic tension and relaxation to a continuous elastic net stretched by gradually increasing the mesh size from the upstream side to the downstream side of the sieving machine. That is.

The elastic net used in the present invention is, for example, a net made of a highly elastic material such as a rubber net that can be repeatedly tensioned and relaxed.

The transfer direction of the raw material on the sieving machine is opposite to the pallet,
Further, the sieving machine is arranged with a downward inclination with respect to the raw material transfer direction. The elastic net is stretched between the crosspieces of different frames of the two frames provided along the traveling direction of the raw material,
The crank mechanism causes both frames to reciprocate back and forth in opposite directions in the forward and backward direction of the raw material, so that the blended raw material charged in the elastic net at the most upstream part of the sieving machine is subjected to repeated tension and relaxation of the elastic net. On the elastic net vibrated up and down, the small grain part of the raw material is segregated in the lower layer and the large grain part is segregated in the upper layer, while the raw material smaller than the mesh of the elastic mesh passes through the mesh and is charged into the pallet. The large raw material is repeatedly blown off by the adjacent elastic net on the downstream side, and is layered on the pallet in order from the lower layer to the large grains, the medium grains, and the small grains. In addition,
When the elastic net moves from the relaxed state to the tensioned state, the raw material is 30
The particle size segregation effect is large because it is bounced upward by the acceleration of G.

Furthermore, if the coke dust is charged into the uppermost elastic net of the sieving machine, the sieve of the uppermost elastic net will allow the fine coke to be evenly loaded on the uppermost layer of the raw material loaded on the pallet. You can

In this way, the ideal raw material charging layer for the feeding operation can be formed.

In this case, the powdered coke may be excluded from the coke added to the raw material in advance, and the coke basic unit can be reduced by improving the ignitability of the powdered coke and improving the flammability by charging the coke at the top of the pallet. You can

〔Example〕

Hereinafter, details of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention in which a sieving machine 14 is arranged between a feed hopper 1 and a belt feeder 10 and a pallet 4.

The ore-burning device is composed of the ore-feeding hopper 1, a belt feeder 10 arranged directly below the ore-hopper hopper 1, and a sieving machine 14. 2 and 3 show the structure of the sieving machine 14, a rubber net 15 is used as an elastic net in the present invention.
Is mounted on the crosspiece 16a of the frame 16 and the crosspiece 17a of the frame 17 by a holding plate 18. One end of each of the frames 16 and 17 has a phase of 18 with respect to the rotary plate 20 via a pin 21 and a connecting rod 19.
They are attached at positions that are 0 ° apart, and the rotating plate 2
0 is a chain 22 via a sprocket 23, a motor 24
Are linked to.

The sieving machine 14 is fixed on a pedestal 27, and a side plate 25 is provided to prevent the raw material 7 from scattering. 26 indicates a shoot.

In FIG. 1, the mixed raw material 7 in the feed hopper 1 is cut out in a fixed amount by a belt feeder 10 directly below and charged into the most upstream part of a sieving machine 14.

Next, the operation mechanism of the rubber net 15 of the sieving machine 14 will be described with reference to FIGS. 2 and 5. The frames 16 and 17 are attached to the rotating plate 20 with their phases shifted by 180 ° C.
When the rotary plate 20 is rotated by 4, the two connecting rods 19 reciprocate in opposite phases, so that the crosspieces 16a and 17a act in the inward direction in the section as shown in FIG.
On the contrary, in the section, it works in the direction to move outward, so
The rubber net 15 stretched over the frames 16 and 17 is relaxed in the section and is strained in the section. Further, in the next cycle, the intervals between the sections become tense and relaxed, and due to the tension and relaxation of the rubber net 15, the raw material 7 is splashed by the adjacent rubber net 15 on the downstream side or the rubber net 15
Will be screened by.

In the present invention, the rubber net 15 of the sieving machine 14 is 2 mm, 3 mm from the most upstream part.
mm, 4 mm, 5 mm, and the raw material 7 sieved from the rubber net 15 is first classified into 2 mm or less of the raw material 7, and then 3 mm or less, 4 mm or less, 5 mm or less in particle size order. The raw material 7 having a size of 5 mm or more that has not been sieved by the rubber net 15 is finally classified.

Since the sieving machine 14 is arranged so that the flow direction of the raw material on the sieving machine 14 is opposite to the traveling direction of the pallet 4, the raw material of 5 mm or more which has not been sieved by the rubber net 15 is placed on the pallet 4. The raw material 7 which is stacked on the lowermost layer and sieved by a rubber net 15 is stacked in descending order of classification particle size (5 mm or less, 4 mm or less, 3 mm or less, 2 mm or less) Charging is achieved. FIG. 4 also shows a mode in which the powder coke 12 is charged on it.

〔The invention's effect〕

The sintering ore feeder of the present invention has the following excellent effects.

(1) Since it is possible to surely charge raw materials ideal for the sintering operation, the quality of the sinter in the direction of the height of the sintered layer is made uniform, the air permeability of the charged layer is improved, and the mass retention is improved. It is expected that a reduction in the unit of coke will be achieved.

(2) Since the rubber net is provided with tension and relaxation, no raw material is attached to the rubber net, and it is possible to prevent the classification effect from being lowered due to clogging, and it is possible to surely segregate and charge. Furthermore, maintenance work is easy without the need to remove adhered powder.

[Brief description of drawings]

1 is an explanatory view of a sintering ore feeding apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of the sieving machine of FIG. 1, and FIG. 3 is A- of FIG.
FIG. 4 is a view as viewed from the direction of arrow A, FIG. 4 is an explanatory view of a loading state of raw materials charged on a pallet by the sintering ore feeding device of the present invention, and FIG. 5 is an operation explanatory view of the rubber net and frame of FIG. , FIG. 6 is an explanatory view of a conventional example. 1 ... Mining hopper, 2 ... Drum feeder 3 ... Belt chute, 4 ... Pallet 5 ... Sprocket, 6 ... Layer thickness adjusting device 7 ... Raw material, 8 ... Belt 10 ... Belt feeder 14 ... … Sieving machine, 15 …… Rubber net 16a …… Bar, 17a …… Bar 18 …… Holding plate, 19 …… Connecting rod 20 …… Rotating plate, 21 …… Pin 22 …… Chain, 23 …… Sprocket 24… … Motor, 25 …… Side plate 26 …… Shoot, 27 …… Stand, ………… Section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuma Nakajima 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama (No house number) Kawasaki Steel Works Mizushima Works

Claims (1)

[Claims] 1. In a sintering ore feeding apparatus for charging a sinter feed compounding raw material into a pallet from a feed hopper, the raw material is transferred in a direction opposite to the transfer direction of the pallet, and is inclined downward in the transfer direction of the raw material. And a plurality of horizontal rails and a sieving machine consisting of two frames that are movable independently of each other in the front-back direction of the tilt and the feed hopper so that the rails of each frame are alternately arranged in parallel. A plurality of elastic nets, which are arranged between pallets and have mesh sizes gradually increased from the upstream side to the downstream side, are continuously stretched between the bars, and the frame is provided at one end of each frame. 2. A sintering ore feeding apparatus comprising: a crank mechanism that reciprocates in opposite directions to impart cyclic tension and relaxation to the elastic net.