JP2020164310A - Conveyance device - Google Patents

Abstract

To provide a conveyance device capable of suppressing grain size segregation of conveyed granular materials.SOLUTION: A conveyance device comprises: a conveyance machine for conveying granular materials of a plurality of different grain diameters; and a chute provided above the conveyance machine and having an inclination part which rolls the charged granular materials in a direction different from a conveyance direction of the conveyance machine, and a charging part which drops the granular materials onto the conveyance machine. The chute comprises a first partition plate provided to an inner wall surface on the side contacting to the inclination part, and a second partition plate provided to an inner wall surface on the side facing the inner wall surface provided with the first partition plate. The first partition plate and the second partition plate are arranged so as not to overlap with each other when the conveyance device is viewed in a vertical direction, and the height position of the second partition plate is lower than the height position of the first partition plate.SELECTED DRAWING: Figure 3

Description

The present invention relates to a transport device.

Conventionally, a transport device for transporting granules is widely used. In general, particle size segregation is likely to occur when transporting particles having different particle sizes. In particular, when the transport direction is changed, particle size segregation is likely to be promoted due to a difference in inertial force due to a difference in particle size.

For example, if particle size segregation occurs when the sinter is transported, the sinter is charged into the sinter cooler provided at the subsequent stage of the transport path in a state of particle size segregation. In the sinter cooler, if the sinter has particle size segregation, the cooling efficiency may decrease.

On the other hand, Patent Document 1 discloses a method for charging a sinter into a sinter cooler, which suppresses particle size segregation by using a sieve. Specifically, the sinter after crushing using a two-stage sieve is divided into three types: normal particle size sinter, fine grain sinter, and finest sinter, and the finest sinter is used as the return sinter. A technique has been proposed in which fine-grained sinter, which is recovered and normally charged into a cooler together with the sinter, is supplied to both sides of the cooler.

Further, Patent Document 2 discloses a technique for suppressing particle size segregation using a relay hopper. Specifically, when transporting raw materials to the bellless blast furnace, a chute with a relay hopper installed upstream of the belt conveyor for charging raw materials to the furnace top bunker, and a straight pipe provided at the top of the relay hopper and at the bottom of the funnel-shaped slope. A technique has been proposed in which a reverse funnel-shaped portion that spreads further toward the end is continuously provided at the lower part of the wall, and a charging chute is provided on the inner wall of the reverse funnel-shaped portion with a repulsive plate that cancels the horizontal velocity component of the raw material. ing.

JP-A 1-259133 Japanese Unexamined Patent Publication No. 2011-17068

However, in the technique disclosed in Patent Document 1, since the sinter has a high temperature, the sieve is required to have a high degree of heat resistance. Therefore, the sieve is frequently replaced, which may reduce the work efficiency. Further, even in the technique disclosed in Patent Document 2, it is difficult to use a normal hopper because the hopper is required to have a high degree of heat resistance. On the other hand, if the particle size segregation can be suppressed without using additional equipment such as a sieve or a hopper, the above problem does not occur. Further, if it becomes possible to suppress particle size segregation without adding equipment, it is considered that it can be applied not only to sinter but also to a transfer device for various particles.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a transport device capable of suppressing particle size segregation occurring during transport of granular materials.

In order to solve the above problems, according to a certain viewpoint of the present invention, a transporter for transporting a plurality of granules having different particle diameters, and a transporter for transporting the granules provided above the transporter and charged. A transport device including an inclined portion that rolls in a direction different from the transporting direction and a chute having a charging portion for dropping particles on the conveyor, and the chute is on the side in contact with the inclined portion. A first partition plate provided on the wall surface and a second partition plate provided on the inner wall surface on the side facing the inner wall surface provided with the first partition plate are provided, and the transport device is provided in the vertical direction. The first partition plate and the second partition plate are arranged so as not to overlap each other when viewed, and the transport device in which the height position of the second partition plate is lower than the height position of the first partition plate is provided. Provided.

Further, when the transport device is viewed in the horizontal direction along the inner wall surface provided with the first partition plate or the second partition plate, the end portion of the second partition plate in the direction extending from the inner wall surface. The second partition plate may be arranged so that the position is below the extension line of the outline of the granular material deposited at an angle of repose on the first partition plate.

Further, when the transport device is viewed in the vertical direction, the positions of the ends of the second partition plate in the direction extending from the inner wall surface may be non-uniform.

When the transport device is viewed in the vertical direction, at least a part of the end portion of the second partition plate in the direction extending from the inner wall surface is the first partition from the inner wall surface provided with the second partition plate. It may be within the range of 30 to 50% of the distance (D) to the inner wall surface provided with the plate.

When the transport device is viewed in the vertical direction, at least a part of the end portion of the second partition plate in the direction extending from the inner wall surface is the first partition from the inner wall surface provided with the second partition plate. The distance (D) to the inner wall surface where the board is provided is within the range of 30 to 35%, the other part is within the range of 35 to 40% of the distance (D), and the other part is. It may be in the range of 40 to 50%.

The shortest distance between the end of the first partition plate in the direction extending from the inner wall surface and the end of the second partition plate in the direction extending from the inner wall surface is the maximum particle size of the granular material. It may be double or more.

When the transport device is viewed in the vertical direction, the positions of the ends of the first partition plate in the direction extending from the inner wall surface may be non-uniform.

When the transport device is viewed in the vertical direction, at least a part of the end portion of the first partition plate in the direction extending from the inner wall surface is the second partition from the inner wall surface provided with the first partition plate. It may be within the range of 35 to 45% of the distance (D) to the inner wall surface on which the plate is provided.

The granules are sinter, and the transfer device may be used to charge the sinter that has been sintered by the sinter into the sinter cooler.

As described above, according to the present invention, it is possible to suppress the particle size segregation that occurs during the transportation of the granular material.

It is explanatory drawing which shows the whole structure example of the transfer apparatus which concerns on embodiment of this invention. It is a top view of the transport device which concerns on this embodiment. It is a top view which shows the structural example of the chute of the transport apparatus which concerns on this embodiment. It is a top view which shows the structural example of the conventional chute. It is sectional drawing which shows the structural example of the chute of the transport apparatus which concerns on this embodiment. It is explanatory drawing which shows the planar shape of the 1st partition plate and the 2nd partition plate. It is explanatory drawing which shows the 1st modification of the 1st partition plate and the 2nd partition plate. It is explanatory drawing which shows the 2nd modification of the 1st partition plate and the 2nd partition plate. It is explanatory drawing which shows the 3rd modification of the 1st partition plate and the 2nd partition plate. It is explanatory drawing which shows the reduced model of the transporting apparatus used in an Example. It is explanatory drawing which shows the particle size segregation of an Example. It is explanatory drawing which shows the particle size segregation of the comparative example. It is a top view from the top of another example of the transport device according to the same embodiment. It is a schematic diagram which shows another example of the transfer apparatus which concerns on the same embodiment. It is a schematic diagram which shows still another example of the transfer apparatus which concerns on this embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals to omit duplicate description.

<1. Overall configuration of transport device>
First, an example of the overall configuration of the transport device according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is an explanatory view schematically showing the overall configuration of the transport device 1, and FIG. 2 is a plan view schematically showing the transport device 1 viewed from above. The transport device according to the present embodiment is a transport device that transports the sinter from a Dwightroid (DL) type sinter to a sinter cooler.

The transfer device 1 includes a direct chute 50, a transfer machine 20, and a cooler chute 30. In the transport device 1, the sinter that was carried out from the sinter 10 and crushed by a crusher (not shown) and charged into the direct chute 50 was dropped onto the sinter 20 and further transported by the sinter 20. The ore is charged into the sintered cooler 40 via the cooler chute 30.

The sintering machine 10 is a DL type sintering machine, and includes a plurality of sintering pallets 11 connected in an endless chain shape and a sprocket 13 for moving the sintering pallets 11. The sintering machine 10 moves the sintering bed formed on the sintering pallet 11 toward the direct chute 50. The sinter bed is formed by sintering the charged sintering raw material and crushing it with a crusher to obtain sinter ore having various particle sizes.

The direct chute 50 drops and throws the sinter that is conveyed by the sinter 10 and crushed and charged by the crusher onto the sinter 20. The direct chute 50 is configured to be able to suppress the segregation of the particle size of the sinter that is dropped and thrown onto the conveyor 20. In the present embodiment, the direct shoot 50 functions as a shoot in the present invention. The configuration of the direct shoot 50 will be described in detail later.

The transport machine 20 transports the sinter that has been dropped and thrown in via the direct chute 50. In the present embodiment, the sinter 20 transports the sinter in a direction intersecting the transport direction of the sinter 10. When the transport device 1 is viewed from above, the transport machine 20 transports the sinter in a direction (Y direction) orthogonal to the transport direction (X direction) of the sinter 10 (see FIG. 2). The conveyor 20 may be, for example, a belt conveyor, but is not limited thereto.

The cooler chute 30 drops the sinter that is conveyed and charged by the sinter 20 into the sinter cooler 40. The sinter ore charged into the sinter cooler 40 is cooled by the cooling air and discharged from the sinter cooler 40.

In the following description, the X direction and the Y direction as the transport direction of the sinter (granular matter) refer to the direction when the transport device 1 is viewed in the vertical direction, and are vertical in the actual transport direction. It does not matter whether it is tilted in the direction or not.

<2. Direct shoot ＞
Next, the configuration of the direct shoot 50 will be specifically described with reference to FIG. FIG. 3 is a schematic view of the transport device 1 viewed horizontally from the transport direction of the transport machine 20, that is, from the direction (Y direction) orthogonal to the transport direction (X direction) of the sintering machine 10.

The direct chute 50 includes a main inlet 51 and a sub inlet 55, which are formed in a substantially rectangular shape, respectively. The main inlet 51 and the sub inlet 55 are connected to the inclined portions 52 and 56, respectively, and the inclined portions 52 and 56 are connected to the substantially rectangular charging portion 60 which opens downward. At least a part of the main inlet 51 is located on the front side of the charging portion 60 in the transport direction (X direction) of the sinter by the sinter 10. At least a part of the sub-inlet 55 is located behind the charging portion 60 in the sinter transport direction (X direction) by the sinter 10.

The sinter ore transported by the sinter 10 falls from the sinter pallet 11 while the sinter pallet 11 turns downward and the sinter bed mounting surface is tilted toward the downward side. The sinter that has fallen at this time is crushed by a crusher (not shown), slides down on the slope of the guide 71 attached to the direct chute 50, and is charged into the main inlet 51.

The sinter charged into the main charging inlet 51 rolls along the stepped inclined bottom surface 52a of the inclined portion 52 and is charged into the charging portion 60. At this time, the sinter introduced from the main inlet 51 rolls the inclined portion 52 from the front side in the sinter transport direction (X direction) by the sinter 10 to the side opposite to the X direction. , Is charged into the charging unit 60.

Some of the sinter that could not be completely dropped from the sinter pallet 11 and was not charged into the main inlet 51 is charged into the sub inlet 55. The sinter charged into the sub-charged inlet 55 rolls along the stepped inclined bottom surface 56a of the inclined portion 56 and is charged into the charging portion 60. At this time, the sinter charged from the sub inlet 55 is charged by rolling the inclined portion 56 in the X direction from the rear side in the transport direction (X direction) of the sinter by the sinter 10. It is charged into the unit 60.

After a certain period of time has passed since the start of operation, the sintered ore forms an angle of repose on the inclined bottom surface 52a of the inclined portion 52 on the main inlet 51 side and the inclined bottom surface 56a of the inclined portion 56 on the sub inlet 55 side. And deposit. Therefore, the sinter charged into each of the main inlet 51 and the sub inlet 55 rolls on the slope formed by the sinter forming the angle of repose and is charged into the charging portion 60.

Since the amount of sinter charged into the sub inlet 55 is small and the effect on the particle size segregation of the sinter dropped onto the transporter 20 is small, the main inlet 55 is used in the present embodiment. The direct chute 50 is configured so as to suppress the grain size segregation of the sinter that is charged into the sinter and rolls the inclined portion 52 and is dropped onto the transporter 20 from the charging portion 60. Hereinafter, a configuration for suppressing particle size segregation of the sinter charged from the main inlet 51 will be described.

The direct chute 50 has a first partition plate 61 and a second partition plate 63 provided in the charging portion 60. The first partition plate 61 is provided on the front inner wall surface 53 on the side in contact with the inclined portion 52 on which the sinter introduced from the main inlet 51 rolls. The second partition plate 63 is provided on the rear inner wall surface 57 located on the side facing the front inner wall surface 53. The height position of the second partition plate 63 is lower than the height position of the first partition plate 61. Further, when the direct chute 50 is viewed in the vertical direction, the first partition plate 61 and the second partition plate 63 are arranged so as not to overlap each other.

Of the sintered ore that is charged from the main charging inlet 51, rolls on the slope forming the angle of repose of the inclined portion 52, and is charged into the charging portion 60 from the front inner wall surface 53 side, the sinter having a relatively small particle size Since the inertial force of the ore is relatively small, and the frictional force with the slope and the frictional force between the sintered ores (hereinafter, also referred to as "internal frictional force") are relatively large, the deposit is from a position where it jumps out into the air. The horizontal reach to the drop position tends to be relatively short. Further, the sinter having a relatively small particle size is unlikely to roll after falling. On the other hand, sinter with a relatively large particle size has a relatively large inertial force and a small frictional force with a slope and an internal frictional force, so that it is horizontal from the position where it jumps out into the air to the position where it falls. The reach is likely to be relatively long. Further, the sinter having a relatively large particle size tends to roll after falling.

Therefore, when the first partition plate and the second partition plate are not provided, the sintered ore having a small particle size is deposited on the front inner wall surface 53 side where the sintered ore charged into the main inlet 51 enters. However, sinter having a large particle size is likely to be deposited on the rear inner wall surface 57 on the opposite side (see FIG. 4).

On the other hand, in the transport device 1 according to the present embodiment, the ejection position of the sinter is shifted to the center side in the X direction of the charging portion 60 by the first partition plate 61 provided on the front inner wall surface 53. .. After the start of the operation, the sintered ore is deposited at an angle of repose from the inclined bottom surface 52a of the inclined portion 52 on the main inlet 51 side to the first partition plate 61.

As a result, the sinter having a relatively small particle size can be dropped toward the center of the transport belt 21 of the transport machine 20 in the width direction. Further, a part of the sinter having a relatively large particle size also falls on the transporter 20, and the other part falls on the second partition plate 63. The sinter is also deposited on the second partition plate 63 at an angle of repose, and the sinter that has fallen on the second partition plate 63 is forward in the X direction after the inertial force is weakened. It falls to the side.

Among the sinters having a relatively large particle size, the sinters that have fallen from the first partition plate 61 toward the center in the width direction of the conveyor 20 roll and roll from the drop position to the rear side in the X direction. It becomes easier to disperse. Further, among the sinters having a relatively large particle size, the sinters that have fallen from the first partition plate 61 onto the second partition plate 63 are the width of the transporter 20 from the second partition plate 63. It falls toward the center of the direction and rolls, making it easier to disperse from the fall position to the front side in the X direction. In this way, the particle size segregation of the sinter that is dropped from the direct chute 50 onto the conveyor 20 is suppressed.

Here, as shown in FIG. 5, when the direct chute 50 is viewed horizontally from the Y direction, that is, the direction along the inner wall surfaces 53 and 57 where the first partition plate 61 or the second partition plate 63 is provided. In addition, the position of the end portion in the direction extending from the inner wall of the second partition plate 63 is larger than the extension line L of the outer line of the sintered ore deposited at the angle of repose on the first partition plate 61. It is preferably arranged so as to be on the bottom. By arranging the second partition plate 63 in this way, at least a part of the sinter having a relatively large particle size that falls from the first partition plate 61 is likely to fall on the second partition plate 63. Become. As a result, the sinter having a relatively large particle size can be dispersed in the front side in the X direction.

It is preferable that the length W1 of at least a part of the first partition plate 61 in the X direction is within the range of 35 to 45% of the distance D from the front inner wall surface 53 to the rear inner wall surface 57. In other words, it is preferable that at least a part of the end portion of the first partition plate 61 in the direction extending from the inner wall surface 53 is within the range of 35 to 45% of the distance D. As a result, the sinter having a relatively small particle size that falls from the first partition plate 61 onto the transport machine 20 can be dropped into the central portion in the width direction of the transport machine 20.

It is preferable that the length W2 of at least a part of the second partition plate 63 in the X direction is within the range of 45 to 50% of the distance D. In other words, it is preferable that at least a part of the end portion of the second partition plate 63 in the direction extending from the inner wall surface 57 is within the range of 30 to 50% of the distance D. As a result, it is possible to increase the certainty that at least a part of the sinter having a relatively large particle size falling from the first partition plate 61 will fall onto the second partition plate 63, and also from the second partition plate 63. The falling sinter can be dispersed on the front side of the transporter 20 in the X direction in the width direction.

The shortest distance W3 between the end of the first partition plate 61 in the direction extending from the inner wall surface 53 and the end of the second partition plate 63 in the direction extending from the inner wall surface 57 is the sintered ore. It is preferable that the particle size is at least twice the maximum particle size of. As a result, it is possible to prevent the sinter from being caught between the first partition plate 61 and the second partition plate 63, that is, a so-called shelf suspension state.

The length of the first partition plate 61 in the X direction and the length of the second partition plate 63 in the X direction may be uniform, and the length of the first partition plate 61 in the X direction or the second partition may be uniform. At least one of the lengths of the plate 63 in the X direction may be non-uniform.

6 to 9 are explanatory views showing the planar shapes of the first partition plate 61 and the second partition plate 63, and are views of the charging portion 60 of the direct chute 50 viewed from the vertical direction. FIG. 6 shows an example in which the length W1 of the first partition plate 61 in the X direction and the length W2 of the second partition plate 63 in the X direction are uniform. 7 and 8 are examples in which the width W2 of the second partition plate 63 is non-uniform, and FIG. 7 shows a first deformation in which the end portion of the second partition plate 63 is formed in a stepped manner. An example is shown, and FIG. 8 shows a second modified example in which the end portion of the second partition plate 63 is formed in an inclined shape. FIG. 9 shows a third modification in which the ends of the first partition plate 61 and the second partition plate 63 are formed in a stepped shape.

As shown in FIG. 6, even if the width W1 of the first partition plate 61 and the width W2 of the second partition plate 63 are uniform, the sintered ore having a relatively small particle size is transferred in the width direction of the transporter 20. It can be dropped toward the center. Further, a part of the sinter having a relatively large particle size can be dropped onto the second partition plate 63 to weaken the inertial force, and then dropped toward the center in the width direction of the conveyor 20.

On the other hand, as shown in FIGS. 7 to 8, the width W2 of the second partition plate 63 is non-uniform, so that the position of the end portion of the second partition plate 63 extending forward from the rear inner wall surface 57 is positioned. The amount of sinter having a relatively large particle size that becomes non-uniform and falls onto the second partition plate 63 can be adjusted. Specifically, the larger the particle size of the sinter, the larger the inertial force until it pops out from the first partition plate 61 and the smaller the internal frictional force, so that the sinter falls to a position closer to the rear inner wall surface 57. .. Therefore, due to the non-uniform position of the end portion of the second partition plate 63, even when the sinter is ejected from the first partition plate 61 at the same speed, it depends on the ejection position in the Y direction. The sinter that falls on the second partition plate 63 and the sinter that falls directly on the conveyor 20 can be separated. Therefore, the sinter having a relatively large particle size, which is charged onto the transport machine 20, is easily dispersed in the width direction of the transport machine 20.

Further, as shown in FIG. 9, not only the width W2 of the second partition plate 63 but also the width W1 of the first partition plate 61 is non-uniform, so that the first partition plate 63 extends rearward from the front inner wall surface 53. The position of the end portion of the partition plate 61 becomes non-uniform, and the drop position of the sinter having a relatively small particle size can be dispersed. Further, if the position of the end portion of the first partition plate 61 is non-uniform, the protruding position of the sinter having a relatively large particle size from the first partition plate 61 in the X direction will be different. The drop position of the sinter or the drop amount on the second partition plate 63 can be adjusted. That is, by appropriately designing the end positions of the first partition plate 61 and the second partition plate 63 in consideration of the particle size distribution of the sinter charged into the direct chute 50C, various particle sizes Sintered ore can be dispersed in the width direction of the transporter 20 to further suppress particle size segregation.

Since the transport belt 21 of the transport machine 20 sequentially moves in the Y direction, the width of at least one of the first partition plate 61 and the second partition plate 63 is non-uniform as shown in FIGS. 7 to 9. Even so, there is no possibility that the particle size segregation of the sinter deposited on the transporter 20 will vary greatly in the Y direction.

As described above, according to the transfer device 1 according to the present embodiment, when the sinter ore discharged from the sinter by the sinter 10 is dropped and thrown onto the transfer machine 20 whose transport directions are orthogonal to each other. Even so, the particle size segregation on the transfer machine 20 can be suppressed without using additional equipment such as a sieve or a hopper. As a result, particle size segregation when the particles are charged into the sintered cooler 40 via the cooler chute is suppressed, and a decrease in cooling efficiency in the sintered cooler 40 can be suppressed.

Hereinafter, examples of this embodiment will be described.
In the following embodiment, the particle size segregation by the transfer device 1 according to the above embodiment is performed by using a reduced model in which the transfer device for transferring the sintering machine from the sintering machine to the sintering cooler is scaled down to 1/10. An experiment of improvement effect was conducted.

(Composition of reduced model)
FIG. 10 is an explanatory diagram showing a reduced model 100 of the transport device used in the embodiment. The reduced model 100 contains the sintered ore charged from the first belt conveyor 110 having a width of 500 mm as a sintering machine, the second belt conveyor 120 having a width of 300 mm as a conveyor, and the first belt conveyor 110. It is composed of a direct chute 150 that drops and throws onto the second belt conveyor 120. The transport direction of the first belt conveyor 110 and the transport direction of the second belt conveyor 120 are orthogonal to each other in the horizontal direction.

In the experiment, the sinter with the particle size distribution shown in Table 1 was used.

In the experiment, the sinter was charged from the first belt conveyor 110 to the direct chute 150 at a charging rate of about 80 kg / min.

(Evaluation method)
The evaluation was carried out by taking out the sinter by dividing it into three equal parts in the width direction at the position S1 on the second belt conveyor 120 shown in FIG. 10 and measuring the particle size distribution of the sinter. The particle size distribution was measured using a sieving test method. The sieving test method is a method in which sieves of different mesh sizes are stacked, a sample to be measured is put in from the top, and vibration or circular motion is performed to sort the samples according to the desired particle size range by the sieving. Can be evaluated without.

The shapes of the first partition plate 61 and the second partition plate 63 of the direct chute 150 used in the embodiment will be described with reference to FIGS. 5 and 7. The length D of the charging portion 60 in the direct chute 150 in the X direction is 258 mm, and the length in the Y direction is 280 mm. The length W1 of the first partition plate 61 in the X direction was made uniform by 100 mm. Further, the length W2 of the second partition plate 63 in the X direction was set to three stages, W2a = 83 mm, W2b = 103 mm, and W2c = 125 mm, respectively. The distances between the end of the first partition plate 61 and the end of the second partition plate 63 when the first partition plate 61 and the second partition plate 63 are viewed in the vertical direction are 73 mm and 55 mm, respectively. It is 33 mm.

The difference in height from the bottom of the inclined bottom surface 52a of the inclined portion 52 on the main inlet 51 side to the first partition plate 61 is 20 mm, and the height position of the first partition plate 61 and the second partition plate 63 The difference from the height position of was set to 100 mm. The shortest distance W3 between the end of the first partition plate 61 and the end of the second partition plate 63 was set to 105 mm.

The shortest distance W3 between the end of the first partition plate 61 and the end of the second partition plate 63 is 35 mm × 2 = 70 mm so that a sinter having a maximum particle size of 35 mm does not cause a shelf suspension state. It was set to be as above. Further, assuming that the horizontal flight distance of the sinter having a small particle size (particle size less than 2 mm) is 20 to 30 mm, the sinter having a small particle size is placed in the central portion in the width direction of the second belt conveyor 120. The length W1 of the first partition plate 61 in the X direction was set to 100 mm so that it could fall. The length W1 of the first partition plate 61 in the X direction is 38.76% of the width D of the charging portion 60.

Assuming that the horizontal flight distance of the sinter with a large particle size (particle size 9.5 mm or more) is 80 to 150 mm, the sinter with a large particle size is weakened in inertial force and the second belt conveyor. The minimum width W2a of the second partition plate 63 was set to 83 mm so that it would fall onto 120. Further, assuming that the horizontal flight distance of the sinter having a medium particle size (particle size 2 mm or more and less than 9.5 mm) is 30 to 60 mm, the sinter having a medium particle size is placed on the second belt conveyor 120. The width of the second partition plate 63 was set to three stages so as to be dispersed in the width direction. The widths W2a, W2b, and W2c of the second partition plate 63 are 32.17%, 39.92%, and 48.45% of the width D of the charging portion 60, respectively.

In the comparative example, a reduced model common to the examples was used except that the first partition plate and the second partition plate were not provided.

(Evaluation results)
The evaluation results are shown in FIGS. 11 and 12. FIG. 11 shows the evaluation results of the comparative example, and FIG. 12 shows the evaluation results of the examples. In FIGS. 11 and 12, the main side refers to the left side of the second belt conveyor 120 in the drawing toward the front in the transport direction, and the sub side refers to the right side on the opposite side.

As shown in FIG. 11, in the comparative example not provided with the first partition plate and the second partition plate, the medium particle size and the large particle size are large at the position S1 on the second belt conveyor 120 on the exit side of the direct chute 150. Sintered ore with a particle size was deposited unevenly from the center to the sub side.

On the other hand, as shown in FIG. 12, in the embodiment provided with the first partition plate 61 and the second partition plate 63, at the position S1 on the second belt conveyor 120 on the exit side of the direct chute 150. , Small particle size, medium particle size and large particle size were all dispersed and deposited in the width direction.

Therefore, by providing the first partition plate 61 and the second partition plate 63 on the direct chute 150, the first belt conveyor 110 to the second belt conveyor 120 whose transport directions are orthogonal to each other via the direct chute 150. It was found that the grain size segregation on the second belt conveyor 120 was suppressed even when the sinter was dropped and thrown in.

Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person having ordinary knowledge in the field of technology to which the present invention belongs can come up with various modifications or modifications within the scope of the technical ideas described in the claims. , These are also naturally understood to belong to the technical scope of the present invention.

For example, in the first modification or the third modification described above, the stepped first partition plate 61 or the second partition plate 63 is formed in a three-stage shape, but the number of stages is limited to three. Not done. The number of stages may be two or four or more. Further, when the first partition plate 61 or the second partition plate 63 is formed in a stepped manner, it is not essential to gradually increase or decrease the width thereof, and regions having different widths are randomly arranged. May be good.

Further, in the above embodiment, the transport direction of the sinter by the sinter and the transport direction of the sinter by the sinter are orthogonal to each other, but the present invention is not limited to this example. As long as the rolling direction of the granules rolling on the inclined portion of the chute is different from the transporting direction of the granules by the transporter, the crossing state may be other than orthogonal, and the granules thrown into the chute may be in an intersecting state. The transport direction and the transport direction of the granular material by the transport machine may be the same direction.

13 and 14 show an example in which the transport direction X of the sinter by the sinter 10 and the transport direction Y of the sinter by the sinter 20 are the same. FIG. 13 is a plan view of the transport device as viewed from above, and FIG. 14 is a schematic view of the transport device as viewed from the transport direction of the transport machine 20. In the example of the transfer device shown in FIGS. 13 and 14, even if the transfer direction X of the sintering machine 10 and the transfer direction Y of the transfer machine are the same, on the inclined bottom surface 52a of the inclined portion 52 of the direct chute 50. The rolling direction Z of the sinter and the transport direction Y of the transporter are different. Even in such a transfer device, by applying the present invention, the particle size segregation of the sinter can be suppressed.

Further, in the above embodiment, the transport device 1 for transporting the sinter from the sinter to the sinter cooler has been described as an example, but the present invention is not limited to such an example. Even if the particles to be transported are other than sinter, particle size segregation can be suppressed by using a transport device to which the present invention is applied.

Further, as shown in FIG. 15, it is a transport device in which granules are charged into a transport machine from a hopper 80 via a chute, and the granules roll on an inclined bottom surface 52a of an inclined portion 52 of the chute 50. The transfer device may have a direction Z different from that of the transfer machine in the transfer direction Y (direction from the back of the paper to the front). Even in such a transfer device, by applying the present invention, the particle size segregation of the sinter can be suppressed.

1 Conveyor device 10 Sintering machine 20 Conveying machine 30 Cooler chute 40 Sintered cooler 50 Direct chute 51 Main inlet 52 Inclination 55 Sub inlet 56 Inclination 53 Front inner wall surface 57 Rear inner wall surface 61 First partition plate 63 2 dividers

Claims (9)

A carrier that conveys a plurality of granules having different particle sizes,
A chute provided above the transport machine and having an inclined portion for rolling the charged particles in a direction different from the transport direction of the transport machine and a charging portion for dropping the particles on the transport machine. In a transport device equipped with
The shoot
A first partition plate provided on the inner wall surface of the charging portion on the side in contact with the inclined portion, and
A second partition plate provided on the inner wall surface on the opposite side to the inner wall surface provided with the first partition plate is provided.
The first partition plate and the second partition plate are arranged so that they do not overlap each other when the transport device is viewed in the vertical direction.
The height position of the second partition plate is lower than the height position of the first partition plate.
Conveyor device. When the transport device is viewed in the horizontal direction along the inner wall surface provided with the first partition plate or the second partition plate, when viewed in a horizontal direction.
The position of the end portion of the second partition plate in the direction extending from the inner wall surface is larger than the extension line of the outer line of the granular material deposited at the angle of repose on the first partition plate. The second partition plate is arranged so as to be on the bottom.
The transport device according to claim 1. When the transport device is viewed in the vertical direction,
The position of the end portion of the second partition plate in the direction extending from the inner wall surface is non-uniform.
The transport device according to claim 1 or 2. When the transport device is viewed in the vertical direction,
At least a part of the end portion of the second partition plate in the direction extending from the inner wall surface is an inner wall surface provided with the first partition plate from the inner wall surface provided with the second partition plate. Within the range of 30-50% of the distance (D) to
The transport device according to any one of claims 1 to 3. When the transport device is viewed in the vertical direction,
At least a part of the end portion of the second partition plate in the direction extending from the inner wall surface is an inner wall surface provided with the first partition plate from the inner wall surface provided with the second partition plate. The distance to (D) is in the range of 30 to 35%, the other part is in the range of 35 to 40% of the distance (D), and the other part is in the range of 40 to 50%. Inside,
The transport device according to claim 4. The shortest distance between the end portion of the first partition plate in the direction extending from the inner wall surface and the end portion of the second partition plate in the direction extending from the inner wall surface is the granular material. Is more than twice the maximum particle size of
The transport device according to any one of claims 1 to 5. When the transport device is viewed in the vertical direction,
The position of the end portion of the first partition plate in the direction extending from the inner wall surface is non-uniform.
The transport device according to any one of claims 1 to 6. When the transport device is viewed in the vertical direction,
At least a part of the end portion of the first partition plate in the direction extending from the inner wall surface is an inner wall surface provided with the second partition plate from the inner wall surface provided with the first partition plate. Within the range of 35-45% of the distance (D) to
The transport device according to any one of claims 1 to 7. The granules are sinter and
The transfer device is used to put the sinter ore sintered by the sinter into the sinter cooler.
The transport device according to any one of claims 1 to 8.

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