JP7346558B2 - Particulate cooling device and scraper - Google Patents

Description

The present disclosure relates to a particulate cooling device and scraper.

A cooling device with an annular hopper is sometimes used to cool the hot granules.

For example, Patent Document 1 discloses an incinerator that includes an annular table, an annular hopper provided above the table, and a louver and a suction fan for supplying cooling air to the internal space (annular space) of the annular hopper. A condensate cooling device is described.

The annular hopper is configured to rotate together with the table around a rotation axis along the vertical direction. While the annular hopper is rotating, high-temperature sintered ore is supplied to the annular hopper from above and deposited on the table and in the internal space of the annular hopper.

A scraper is installed below the annular hopper. As the annular hopper and the annular table rotate, the sintered ore deposited on the table is guided radially outward by the scraper, and the sintered ore is guided radially outward through the annular hopper and the annular table through the open part formed between the lower end of the outer peripheral side of the annular hopper and the table. It is designed to be continuously discharged from the hopper. As the sintered ore is discharged from the annular hopper in this manner, the sintered ore accumulated in the annular hopper descends.

Cooling air is taken into the internal space of the annular hopper from the outside via a louver provided at the bottom of the annular hopper. The cooling air is sucked by a suction fan and flows upward through the internal space of the annular hopper in which the sintered ore is deposited. In other words, the high-temperature sintered ore is cooled by the cooling air flowing inside the annular hopper from the time it is supplied to the annular hopper until it descends as the annular hopper rotates and is discharged from below. There is.

Patent No. 5138245

By the way, in a cooling device for granular materials using an annular hopper and a scraper as described in Patent Document 1, for example, the descending speed (unloading speed) of the granular material is lowered between the inner circumferential side and the outer circumferential side in the internal space of the annular hopper. ) may differ. In this case, the temperature inside the hopper will be distributed due to the difference in the unloading speed of the granules. When temperature distribution occurs in the hopper in this manner, the granules cooled in the hopper may be insufficiently cooled or overcooled, which may cause problems in terms of product quality.

In view of the above circumstances, it is an object of at least one embodiment of the present invention to provide a cooling device and a scraper for granular materials that can suppress insufficient cooling or overcooling of granular materials.

(1) A granular material cooling device according to at least one embodiment of the present invention includes:
an annular hopper provided around a central axis and having an inner circumferential wall and an outer circumferential wall defining a receiving space for receiving supply of particulate matter;
an annular table provided around the central axis below the receiving space;
a cooling unit for supplying cooling fluid to the receiving space of the annular hopper;
a scraper provided between the annular hopper and the annular table,
The scraper is
a first portion located radially inward from an intermediate position between the inner circumferential wall and the outer circumferential wall;
a second portion of the scraper located within a range facing the annular table and radially outward from the intermediate position between the inner circumferential wall and the outer circumferential wall;
including;
A lower surface of the second portion of the scraper is located higher than a lower surface of the first portion.

According to at least one embodiment of the present invention, there is provided a cooling device and a scraper for granular materials that can suppress insufficient cooling or overcooling of granular materials.

FIG. 1 is a schematic cross-sectional view of a cooling device for sintered ore (granules) according to an embodiment. 2 is a schematic plan view of the cooling device shown in FIG. 1. FIG. It is a schematic sectional view showing the periphery of the lower end part of an annular hopper concerning one embodiment. It is a schematic sectional view showing the periphery of the lower end part of an annular hopper concerning one embodiment. It is a schematic sectional view showing the periphery of the lower end part of an annular hopper concerning one embodiment. It is a schematic sectional view showing the periphery of the lower end part of an annular hopper concerning one embodiment. It is a schematic sectional view showing the periphery of the lower end part of an annular hopper concerning one embodiment. 6 is a plan view of the scraper shown in FIG. 5. FIG.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as the embodiments or shown in the drawings are not intended to limit the scope of the present invention thereto, and are merely illustrative examples. do not have.

Hereinafter, a sintered ore cooling device will be described as an embodiment of a granular material cooling device according to the present invention, but the present invention is not limited thereto. Note that sintered ore is obtained by subjecting iron ore, which is a raw material for pig iron, to sintering treatment as a pretreatment. The grain size of sintered ore is generally about 5 mm or more and 200 mm or less.

FIG. 1 is a schematic cross-sectional view of a cooling device for sintered ore (granular material) according to one embodiment, and FIG. 2 is a schematic plan view of the cooling device shown in FIG. 1. As shown in FIG. 1, the cooling device 1 includes an annular hopper 2 and an annular table 12 provided around a central axis O along the vertical direction, a cooling section 10, and a scraper 30.

The annular hopper 2 includes an inner plate 3 and an outer plate 4 provided circumferentially around a central axis O, and includes an inner circumferential wall 3 a that is a wall surface of the inner plate 3 and an outer circumferential wall 4 a that is a wall surface of the outer plate 4. An annular receiving space 6 is defined by this. Further, above the annular hopper 2, a supply chute 27 is provided for supplying high-temperature sintered ore 5 (granular material) from a sintering furnace (not shown) to the receiving space 6 of the annular hopper 2.

The annular table 12 is provided around the central axis O below the receiving space 6 of the annular hopper 2 . The annular table 12 has an inner circumferential end 12a and an outer circumferential end 12b, and the outer circumferential end 12b is located radially outward from the lower end 4b of the outer circumferential wall 4a of the annular hopper 2. The sintered ore 5 supplied to the receiving space 6 is deposited on the annular table 12.

Here, the lower end 4b of the outer peripheral wall 4a of the annular hopper 2 is located higher in the vertical direction than the lower end 3b of the inner peripheral wall 3a. That is, the lower end 3b of the inner peripheral wall 3a is in contact with the upper surface of the annular table 12, whereas the lower end 4b of the outer peripheral wall 4a and the upper surface of the annular table 12 are located apart in the vertical direction. Therefore, on the annular table 12, the sintered ore 5 is deposited in the space below the lower end 4b of the outer peripheral wall 4a, and also in the area radially outward from the lower end 4b.

The annular table 12, the inner plate 3, and the outer plate 4 are supported by frames 21 and 22 provided on their inner peripheral sides. The frames 21 and 22 are rotatably coupled to a center bearing 14 provided on the foundation 13 at the position of the center axis O.

A plurality of circular rails 15 are fixed to the lower surface of the frame 21 below the annular table 12. Further, on the foundation 13, a plurality of support rollers 16 are arranged in a circular shape corresponding to the plurality of circular rails 15, and the annular table 12 and the annular hopper 2 are supported via the rails 15. It is rotatably supported on rollers 16. A drive motor 17 is connected to a plurality of the support rollers 16, and the annular table 12 and the annular hopper 2 are rotated around the central axis O by the rotational frictional force of the support rollers 16 by the drive motor 17. It has become.

The scraper 30 is provided between the lower end 4b of the outer peripheral wall 4a of the annular hopper 2 and the annular table 12 in the vertical direction. Further, the scraper 30 is configured to guide the sintered ore 5 (granules) deposited on the annular table 12 to the outside of the annular table 12 in the radial direction. Thereby, the sintered ore 5 deposited on the annular table 12 and in the receiving space 6 of the annular hopper 2 is gradually discharged to the outside of the cooling device 1.

As shown in FIG. 2, the tip surface 32 of the scraper 30 is provided so as to face the inner circumferential wall 3a of the annular hopper 2. Further, the scraper 30 is arranged to be inclined in the rotational direction of the annular hopper 2 and the annular table 12 with respect to the radial direction of the annular hopper 2 (or the annular table 12) in plan view. In plan view, the inclination angle φ (see FIG. 2) of the scraper 30 with respect to the radial direction is, for example, 15 degrees or more and 45 degrees or less.
Note that in this specification, the vertical direction is a direction along the vertical direction, and is the same direction as the direction of the central axis O.

FIG. 3 is a schematic cross-sectional view showing the vicinity of the lower end of the annular hopper 2. As shown in FIG. Note that the cross-sectional view in FIG. 3 is a cross-sectional view including the radial direction and the vertical direction. The sintered ore 5 supplied to the annular hopper 2 is deposited on the annular table 12 and in the receiving space 6 of the hopper. The sintered ore 5 is deposited on the annular table 12, forming an angle of repose α (see FIG. 3) in a space radially outward from the lower end 4b of the outer peripheral wall 4a. The angle of repose α has different values depending on the granule, and in the case of sintered ore, the angle of repose α is about 35 degrees.

In a cross section including the radial direction and the vertical direction, the angle θ between the straight line L1 connecting the lower end 4b of the outer peripheral wall 4a and the outer peripheral end 12b of the annular table 12 and the straight line along the upper surface of the annular table 12 (Fig. 3 ) is set smaller than the repose angle α of the particles deposited on the annular table 12.

In one embodiment, the above-mentioned angle θ may be greater than or equal to 15 degrees and less than or equal to 40 degrees. Further, in one embodiment, the above-mentioned angle θ may be greater than or equal to 20 degrees and less than or equal to 35 degrees. By setting the above-mentioned angle θ to 40 degrees or less or 35 degrees or less, it is possible to sufficiently secure a space in which the particulate matter forms an angle of repose α and accumulates on the annular table 12. Further, by setting the above-mentioned angle θ to 15 degrees or more or 20 degrees or more, the outer diameter of the annular table 12 does not become too large, so that the granules scraped off by the scraper 30 on the annular table 12 can be transferred to the belt conveyor. Easy to move appropriately to other transport means.

The cooling unit 10 is configured to supply cooling fluid (eg, air) to the receiving space 6 of the annular hopper 2 . In the exemplary embodiment shown in FIG. 1 , the cooling unit 10 has an inner louver 7 , an outer louver 8 and a central louver 9 for introducing air into the receiving space 6 of the annular hopper 2 from the outside, and an upper part of the annular hopper 2 . and a suction fan 20 connected to the provided exhaust duct 19.

The inner louver 7 and the outer louver 8 are incorporated into the lower portions of the inner plate 3 and outer plate 4 of the annular hopper 2, respectively, and form a passage for taking in air (cooling fluid) from outside of the annular hopper 2. The central louver 9 is provided at a position near the center of the inner plate 3 and the outer plate 4 in the radial direction. The central louver 9 is supplied with air from the outside of the annular hopper 2 via a ventilation duct (not shown) provided inside the annular hopper 2 to extend along the radial direction between the inner plate 3 and the outer plate 4. The intake air (cooling fluid) is supplied.

An annular hood 18 is provided at the top of the annular hopper 2 so as to cover the top of the annular hopper 2, and an exhaust duct 19 is connected to the hood 18 so as to communicate with the hood 18. A suction fan 20 is connected to the end of the exhaust duct 19, and by sucking the air inside the hood 18 with the suction fan 20, outside air is taken in from the inner louver 7, the outer louver 8, and the center louver 9. The taken in outside air is passed through the sintered ore 5 in the annular hopper 2 to cool the sintered ore 5. High-temperature air (exhaust gas) after cooling the sintered ore 5 is discharged to the outside of the cooling device 1 via the exhaust duct 19.

A dust remover may be provided upstream of the suction fan 20 to remove dust contained in the air sucked by the suction fan 20. Further, the high temperature exhaust gas from the exhaust duct 19 may be supplied to a boiler for recovering exhaust heat.

A seal portion 23 is provided to suppress leakage of cooling air from between the rotating annular hopper 2 and the stationary hood 18. The seal portion 23 includes a groove portion 24 provided at the upper portions of the inner plate 3 and the outer plate 4 and having an opening at the upper portion, and a sealing plate 26 attached to the hood 18. The sealing plate 26 is inserted into the groove 24 from above, and by supplying a predetermined amount of water 25 to the groove 24 and submerging the sealing plate 26 in the water in the groove 24, the annular hopper 2 is sealed. The space between the upper part and the hood 18 is sealed.

As described above, the annular hopper 2 is configured to rotate together with the annular table 12 around the central axis O along the vertical direction. While the annular hopper 2 is rotating, high-temperature sintered ore 5 is supplied from above through the supply chute 27 into the receiving space 6 of the annular hopper 2 . The sintered ore 5 thus supplied is deposited on the annular table 12 and in the receiving space 6 of the annular hopper 2 while forming a circumferential layer.

Cooling air is taken into the receiving space 6 via louvers 7, 8, and 9 provided at the bottom of the annular hopper 2, and this cooling air is sucked into the suction fan 20 connected to the exhaust duct 19. It flows upward within the receiving space 6. Therefore, the sintered ore 5 deposited in the receiving space 6 is cooled by the cooling air flowing within the receiving space 6.

The sintered ore 5 deposited on the annular table 12 is guided radially outward by the scraper 30 provided below the annular hopper 2 as the annular hopper and the annular table rotate, and the sintered ore 5 is guided to the outside in the radial direction by the scraper 30 provided below the annular hopper 2. The liquid is discharged from the annular hopper 2 through an opening formed between the lower end 4b and the annular table 12. As the sintered ore 5 is discharged from the annular hopper 2 in this manner, the sintered ore 5 accumulated in the annular hopper 2 descends.

That is, the high-temperature sintered ore 5 supplied to the receiving space 6 of the annular hopper 2 through the supply chute 27 descends as the annular hopper 2 and the annular table 12 rotate, and is moved downward by the scraper 30 to the annular hopper 2. It is designed to be cooled by cooling air flowing inside the annular hopper 2 until it is discharged. Note that until the sintered ore 5 supplied from the supply chute 27 to the annular hopper 2 is discharged from below the annular hopper 2 by the scraper 30, the annular hopper 2 and the annular table 12 are 15 times).

Next, the cooling device 1 and the scraper 30 according to some embodiments will be described in more detail. 4 to 7 are schematic cross-sectional views showing the periphery of the lower end of the annular hopper 2 (including the annular table 12) according to one embodiment. Note that the cross-sectional views in FIGS. 4 to 7 are cross-sectional views including the extending direction of the scraper 30 (direction of the center line of the scraper 30) and the vertical direction, and correspond to the cross-sectional view taken along the line A-A in FIG. It is something. Moreover, FIG. 8 is a plan view of the scraper 30 shown in FIG. 5.

As shown in FIGS. 4 to 8, the scraper 30 has a distal end surface 32 facing the inner circumferential wall 3a of the annular hopper 2, an upper surface 34 located above in the vertical direction, and a lower surface 36 located below. Upper surface 34 and lower surface 36 are each connected to tip surface 32. The cross-sectional shape of the scraper 30 is approximately rectangular.

In some embodiments, for example, as shown in FIGS. 4 to 7, the scraper 30 is located radially inward (in the drawings) from a radially intermediate position Pc between the inner circumferential wall 3a and the outer circumferential wall 4a of the annular hopper 2. It includes the first portion 101 located in the region indicated by R ₁ ), and is located within the range of the scraper 30 facing the annular table 12 and radially outward from the above-mentioned intermediate position Pc (i.e., the region indicated by R ₂ in the figure). and a _second portion 102 in which the lower surface 36 is located higher than the first portion 101. That is, the second portion 102, in which the distance between the annular table 12 and the lower surface 36 is greater than the distance between the annular table 12 and the lower surface 36 in the first portion 101, is within the above-mentioned opposing range and radially outward than the intermediate position Pc. exists in
Note that the portion of the scraper 30 within the range facing the annular table 12 means a portion of the scraper 30 where the lower surface 36 faces the annular table 12.

In FIGS. 4 to 7, R ₁ is a region radially inner than the above-mentioned intermediate position Pc and radially outer than the connection portion between the lower surface 36 and the tip surface 32. R ₂ is a region radially outer than the above-mentioned intermediate position Pc and radially inner than the lower end 4b of the outer peripheral wall 4a. _R3 is a region that is radially outer than the lower end 4b of the outer peripheral wall 4a and radially inner than the outer peripheral end 12b of the annular table 12.

Note that, typically, the scraper 30 extends radially outward from the outer circumferential end 12b of the annular table 12. A portion of the scraper 30 within the range facing the annular table 12, that is, a portion located in regions R ₁ , R ₂ , R ₃ in the radial direction (or in the extending direction of the scraper 30 ) is located on the annular table 12 . This is the part located within the contact range (within the contact range) with the sintered ore 5 deposited on the sintered ore 5 . On the other hand, a portion of the scraper 30 that is radially outer than the outer peripheral end 12b of the annular table 12 is a portion located outside the contact range with the sintered ore 5 deposited on the annular table 12.

When using a conventional scraper, that is, a scraper whose lower surface has a constant position in the vertical direction, the unloading speed tends to be high in the outer circumferential region of the annular hopper, and the unloading speed tends to be low in the inner circumferential region. In this case, the residence time of the granules in the annular hopper is relatively short in the outer region and relatively long in the inner region, so the temperature in the annular hopper (or the temperature of the sintered ore in the annular hopper) is relatively high in the outer peripheral region and relatively low in the inner peripheral region. As a result, problems may arise in the quality of the sintered ore obtained from the cooling device, such as the sintered ore in the outer circumferential region becoming insufficiently cooled or the sintered ore in the inner circumferential region becoming overcooled.

Further, in the annular hopper, the lower the temperature, the smaller the pressure loss, so cooling air flows more easily into the lower temperature region, and less easily flows into the higher temperature region. For this reason, the temperature difference within the annular hopper increases, which may result in insufficient cooling of the sintered ore in the outer peripheral region and further overcooling of the sintered ore in the inner peripheral region.

In this regard, in the above-described embodiment, the second portion 102 having the lower surface 36 at a higher location than the lower surface 36 of the first portion 101 is provided radially outward from the intermediate position Pc between the inner peripheral wall 3a and the outer peripheral wall 4a. Therefore, compared to the case where such second portion 102 is not provided, it becomes easier to reduce the unloading speed of the outer circumferential side region within the annular hopper 2.

More specifically, in the above-described embodiment, by making the height of the lower surface 36 of the second portion 102 relatively high, the sintered ore 5 deposited on the annular table 12 on the radially outer side of the intermediate position Pc is By relatively reducing the scraping amount (that is, the amount of sintered ore 5 discharged radially outward), it is possible to relatively reduce the unloading speed in the outer circumferential region within the annular hopper 2. Alternatively, in the above-described embodiment, by making the height of the lower surface 36 of the second portion 102 relatively high, the radial direction of the sintered ore 5 in the inner circumferential region is provided between the second portion 102 and the annular table 12. A path (gap) to the outside is secured, and through this path, the sintered ore 5 in the inner peripheral area can be smoothly discharged radially outward, and the sintered ore 5 that has come from the inner peripheral area to the gap is As a result, the unloading of the load in the outer circumferential area can be prevented, so that the rate of unloading of the load in the outer circumferential area within the annular hopper 2 can be relatively reduced.

Therefore, according to the embodiment described above, it becomes easier to equalize the unloading speed in the annular hopper 2 between the outer circumference side region and the inner circumference side region, and it becomes easy to suppress insufficient cooling and/or overcooling of the sintered ore 5. can do.

In the exemplary _embodiment shown in FIGS. 4 to 6, the scraper ₃₀ is satisfies H ₁ >H ₂ .

In the embodiment described above, the vertical dimension H ₂ of the second portion 102, which is provided radially outward from the intermediate position Pc and whose lower surface 36 is relatively high, is equal to the vertical dimension H ₁ of the first portion 101. smaller than Therefore, since the amount of scraping by the scraper 30 at a position radially outward from the intermediate position Pc can be reduced, the unloading speed of the outer circumferential region within the annular hopper 2 can be reduced more reliably. Therefore, the unloading speed in the annular hopper 2 can be equalized between the outer circumference side region and the inner circumference side region, and insufficient cooling and/or overcooling of the sintered ore 5 can be suppressed.

In some embodiments, the scraper 30 sets the average value of the vertical dimension in the region between the intermediate position Pc in the radial direction and the lower end 3b of the inner peripheral wall 3a (region _R1 in the figure) as H _{in_ave} . , H _{in_ave} > H ₂ is satisfied, where H ₂ is the vertical dimension of the second portion 102 . Note that the above-described first portion 101 is included in the region between the intermediate position Pc in the radial direction and the lower end 3b of the inner peripheral wall 3a (region _R1 in the figure).

In this case, the vertical dimension _H2 of the second portion 102, which is provided on the radially outer side than the intermediate position Pc and whose lower surface 36 is relatively high, is set between the radial intermediate position Pc and the lower end 3b of the inner peripheral wall 3a. Since it is made smaller than the average value H _{in_ave} of the vertical dimension in the region R ₁ between, the unloading speed of the outer circumferential region in the annular hopper 2 can be reduced more reliably. Therefore, the unloading speed in the annular hopper 2 can be equalized between the outer circumference side region and the inner circumference side region, and insufficient cooling and/or overcooling of the sintered ore 5 can be suppressed.

In some embodiments, the scraper 30 sets the average value of the vertical dimension in the region between the intermediate position Pc in the radial direction and the lower end 3b of the inner peripheral wall 3a (region _R1 in the figure) as H _{in_ave} . , when the average value of the vertical dimension in the region between the intermediate position Pc in the radial direction and the lower end 4b of the outer peripheral wall 4a (region _R2 in the figure) is H _{out_ave} , H _{in_ave} > H _{out_ave} is satisfied. . Note that the above-mentioned second portion 102 is included in the region between the intermediate position Pc in the radial direction and the lower end 4b of the outer peripheral wall 4a (region _R2 in the figure).

In this case, the average value _{Hout_ave} of the vertical dimension in the region _R2 between the intermediate position Pc in the radial direction and the lower end 4b of the inner peripheral wall 3a is the average value Hout_ave of the vertical dimension between the intermediate position Pc in the radial direction and the lower end 3b of the inner peripheral wall 3a. Since it is made smaller than the average value H _{in_ave} of the vertical dimension in the region R ₁ between them, the unloading speed of the outer peripheral region in the annular hopper 2 can be more reliably reduced. Therefore, the unloading speed in the annular hopper 2 can be equalized between the outer circumference side region and the inner circumference side region, and insufficient cooling and/or overcooling of the sintered ore 5 can be suppressed.

In the exemplary embodiment shown in FIGS. 4-6, the scraper 30 includes a first portion 101 as described above, a tip 103 having a flat lower surface 36A facing the annular table 12, and a second portion 102 as described above. and an adjacent portion 104 that is provided adjacent to the tip portion 103 on the radially outer side of the tip portion 103 and has a larger distance between the annular table 12 and the lower surface 36B than the tip portion 103. . Here, when the distance between the lower surface 36A of the tip portion 103 and the annular table 12 is g ₃ and the distance between the lower surface 36B of the adjacent portion 104 and the annular table 12 is g ₄ , g ₃ <g ₄ holds true.

Alternatively, the above-described scraper 30 has a tip portion 103 having a flat lower surface 36A, and a flat lower surface 36A of the tip portion 103 that is adjacent to the tip portion 103 in the extending direction of the scraper 30 (direction of the center line of the scraper 30). and an adjacent portion 104 having a lower surface 36B located higher than the lower surface 36B.

The above-mentioned tip portion 103 and adjacent portion 104 are located within the contact range of the scraper 30 with the sintered ore 5. That is, the tip portion 103 and the adjacent portion 104 of the scraper 30 are installed in the cooling device 1 so that the lower surface 36 faces the annular table 12.

According to the above-described embodiment, the adjacent portion 104 adjacent to the distal end portion 103 has the lower surface 36B located higher than the flat lower surface 36A of the distal end portion 103, so that the adjacent portion 104 is within the range facing the annular table 12 (i.e., , R ₁ to R ₃ ), it is easier to reduce the unloading speed in the outer circumference side region in the annular hopper 2 than in the case where the distance to the annular table 12 is approximately equal and the lower surface is flat. . Further, in the above-described embodiment, since the tip 103 of the scraper 30 has the flat lower surface 36A facing the annular table 12, the amount of sintered ore 5 scraped in the inner peripheral area by the tip 103 is ensured. This facilitates the unloading of the inner circumferential area. Therefore, it becomes easier to equalize the unloading speed in the annular hopper 2 between the outer peripheral region and the inner peripheral region, and it is possible to suppress insufficient cooling and/or overcooling of the sintered ore 5.
Note that the distance between the lower surface 36 of the scraper 30 and the annular table 12 is approximately equal when the ratio of the difference between the maximum value and the minimum value of the distance to the maximum value of the distance is 0% or more and 10% or less. It means that.

In some embodiments, for example, as shown in FIGS. 4 and 5, the boundary between the distal end portion 103 and the adjacent portion 104 (indicated by a chain line L _B in the drawings) is located between the intermediate position Pc and the outer periphery in the radial direction. It is located between the lower end 4b of the wall 4a. In the embodiment shown in FIG. 4, the boundary _LB between the distal end portion 103 and the adjacent portion 104 is located so as to overlap with the intermediate position Pc in the radial direction.

In this case, since the tip portion 103 having the flat lower surface 36A extends radially to the same level as the intermediate position Pc or to the outer side in the radial direction, it is difficult to ensure a sufficient length of the tip portion 103. This makes it easier to scrape off the sintered ore 5 in the inner peripheral area. Therefore, it becomes easier to equalize the unloading speed in the annular hopper 2 between the outer peripheral region and the inner peripheral region, and it is possible to suppress insufficient cooling and/or overcooling of the sintered ore 5.

In the embodiment shown in FIG. 5, the boundary _LB between the distal end portion 103 and the adjacent portion 104 is located radially outward from the intermediate position Pc. The second portion 102 included in the adjacent portion 104 is located further radially outward than the boundary _LB described above. Moreover, as already stated, the first portion 101 included in the tip portion 103 is located radially inward from the intermediate position Pc. Therefore, in the embodiment shown in FIG. 5, neither the first portion 101 nor the second portion 102 exists within a position range that is radially outer than the intermediate position Pc and radially inner than the boundary _LB.

Although not particularly shown, as a modified example of FIG. 5, the boundary L _B between the distal end portion 103 and the adjacent portion 104 is located inside the intermediate position Pc in the radial direction, and the upper surface 34 and the lower surface 36 of the adjacent portion 104 are annular. The same explanation applies when the table 12 extends substantially parallel to the top surface of the table 12.
That is, in the above-mentioned modification, the boundary _LB between the distal end portion 103 and the adjacent portion 104 is located radially inward than the intermediate position Pc. The first portion 101 included in the tip portion 103 is located further inward in the radial direction than the boundary _LB described above. Further, as already described, the second portion 102 included in the adjacent portion 104 is located radially outward from the intermediate position Pc. Therefore, in the above-mentioned modification, neither the first portion 101 nor the second portion 102 exists within the position range that is radially inner than the intermediate position Pc and radially outer than the boundary _LB.

In some embodiments, when the distance in the radial direction between the intermediate position Pc and the lower end 4b of the outer peripheral wall 4a is W (see FIG. 8), the boundary _LB between the tip portion 103 and the adjacent portion 104, The distance W ₁ (see FIG. 8) in the radial direction from the lower end 4b of the outer peripheral wall 4a is 0.2×W or more and W or less.

In this case, since the distance W1 in the radial direction between the boundary _LB between the tip portion 103 and the adjacent portion 104 and the lower end 4b of the outer peripheral wall 4a is set to _0.2 ×W or more, the adjacent portion including the second portion 102 A sufficient length of the sintered ore 104 can be ensured, thereby making it possible to sufficiently reduce the amount of sintered ore 5 scraped off in the outer circumference side area, making it easier to suppress the unloading of the outer circumference side area in the annular hopper 2. . Moreover, since the above-mentioned distance W ₁ is set to be less than or equal to W, the length of the tip portion 103 can be ensured, thereby making it easier to ensure the amount of scraped sintered ore 5 in the inner circumferential region. Therefore, according to the embodiment described above, the unloading speed in the annular hopper 2 can be effectively equalized between the outer circumferential side region and the inner circumferential side region, and the sintered ore 5 is prevented from being insufficiently cooled and/or overcooled. Cooling can be suppressed.

In some embodiments, the above-mentioned distance W ₁ may be greater than or equal to 0.2×W and less than or equal to 0.5×W.

In the annular hopper 2, the sintered ore 5 deposited in an area approximately 0.5×W from the lower end 4b of the outer peripheral wall 4a in the radial direction is deposited in an area outside the hopper on the annular table 12 (outer periphery in the radial direction). It will be deposited in the region between the lower end 4b of the wall 4a and the outer peripheral end 12b of the annular table 12; the region corresponding to _R3 in the figure). In this regard, by setting the above-mentioned distance W ₁ to 0.5×W or less, it becomes easier to suppress the unloading of the sintered ore 5 that would be deposited in the area outside the hopper. Therefore, the unloading speed in the annular hopper 2 can be more effectively equalized between the outer circumference side region and the inner circumference side region, and insufficient cooling and/or overcooling of the sintered ore 5 can be suppressed. .

Note that in some embodiments, for example, as shown in FIG. 7, the boundary _LB between the distal end portion 103 and the adjacent portion 104 is located between the intermediate position Pc and the lower end 3b of the inner peripheral wall 3a in the radial direction. You may do so.

In some embodiments, the adjacent portion 104 of the scraper 30 is at least a region between the lower end 4b of the outer peripheral wall 4a and the outer peripheral end 12b of the annular table 12 in the radial direction (i.e., region R ₃ in the figure). It extends over 30% or more of the area.
Note that in the exemplary embodiment shown in FIGS. 4 to 6, the adjacent portion 104 of the scraper 30 is a region between the lower end 4b of the outer peripheral wall 4a and the outer peripheral end 12b of the annular table 12 in the radial direction (i.e. It extends over the entire area (100% range) of region R ₃ in the figure.

When the adjacent portion 104 of the scraper 3 extends in the radial direction over a part of the above-mentioned region _R3 (that is, when it extends over less than 100% of the region R3), the adjacent portion 104 The position in the radial direction is not particularly limited. For example, the adjacent portion 103 may be located in the radially outermost region of the region _R3 (the position range including the outer peripheral end 12b of the annular table 12 in the radial direction). Alternatively, the adjacent portion 103 may be located in the radially innermost region of the region _R3 (the position range including the lower end 4b of the outer peripheral wall 4a in the radial direction). Alternatively, the adjacent portion 103 may be located in a position range between the lower end 4b of the outer peripheral wall 4a and the outer peripheral side end 12b of the annular table 12 in the radial direction of the region _R3 .

The space between the lower end 4b of the outer circumferential wall 4a and the annular table 12 in the vertical direction includes a hopper outer region (an area between the lower end 4b of the outer circumferential wall 4a in the radial direction and the outer circumferential end 12b of the annular table 12; The sintered ore 5 is deposited so as to form an angle of repose α (see FIG. 3) with the top surface of the annular table 12 in a region corresponding to _R3 . In this regard, in the above-described embodiment, since the adjacent portion 104 in which the lower surface 36 is higher than the tip portion 103 extends over 30% or more of the outside area of the hopper, the sintered ore deposited in the outside area of the hopper is 5 can be reduced, and thereby the unloading speed in the outer circumferential region inside the annular hopper 2 can be effectively reduced. Therefore, the unloading speed in the annular hopper 2 can be more effectively equalized between the outer peripheral region and the inner peripheral region, and insufficient cooling and/or overcooling of the granular materials can be suppressed.

In some embodiments, as shown in FIG. 6, for example, the adjacent portion 104 of the scraper 30 is such that the distance g ₄ in the vertical direction between the lower surface 36 of the scraper 30 and the upper surface of the annular table 12 is radially outwardly. It has a part that gets larger towards the other side.

In the embodiment described above, the distance _g4 in the vertical direction between the lower surface 36B of the adjacent portion 104 and the upper surface of the annular table 12 has a portion in which it becomes larger toward the outside in the radial direction. That is, in the adjacent portion 104 of the scraper 30, the amount of sintered ore 5 scraped off becomes easier to decrease as it goes radially outward, thereby effectively reducing the unloading speed in the outer circumferential area within the annular hopper 2. can be reduced. Therefore, the unloading speed in the annular hopper 2 can be more effectively equalized between the outer circumference side region and the inner circumference side region, and insufficient cooling and/or overcooling of the sintered ore 5 can be suppressed. .

In some embodiments, for example, as shown in FIG. 6, a portion where the above-mentioned distance _g4 becomes larger toward the outside in the radial direction is at least a region outside the lower end 4b of the outer peripheral wall 4a in the radial direction (in the figure). exists within the region R ₃ ). In the embodiment shown in FIG. 6, the above-mentioned distance _g4 increases toward the outside in the radial direction, and the region _R2 between the radial intermediate position Pc and the lower end 4b of the outer peripheral wall 4a and It exists over region _R3 .

The cross-sectional area of the sintered ore 5 deposited in the outside region of the hopper radially outside the lower end 4b of the outer peripheral wall 4a becomes smaller as it goes upward in the vertical direction. In this regard, in the above-described embodiment, in the portion of the scraper 30 that exists in the area outside the hopper, there is a portion where the distance g ₄ between the lower surface 36B and the annular table 12 increases as it goes radially outward. The amount of scraped sintered ore 5 in the outer region can be effectively reduced. This makes it possible to more effectively reduce the unloading speed in the outer peripheral area of the annular hopper 2, and more effectively equalize the unloading speed in the annular hopper 2 between the outer peripheral area and the inner peripheral area. can be converted into

In some embodiments, for example, as shown in FIG. 6 or 7, the upper surface 34 of the scraper 30 at the radial position of the lower end 4b of the outer peripheral wall 4a (the position indicated by _U2 in the figure) is at an intermediate position Pc. It is located above the upper surface 34 of the scraper 30 (position indicated by _U1 in the figure).

In this case, the upper surface 34 of the scraper 30 in the radial direction of the lower end 4b of the outer peripheral wall 4a is located higher than the upper surface 34 of the scraper 30 at the intermediate position Pc, so the accumulated sintered ore 5 is scraped in the area outside the hopper. It becomes easier to reduce the amount taken. Therefore, the unloading speed of the outer circumferential area inside the annular hopper 2 can be effectively reduced.

In some embodiments, the width D 2 of the second portion 102 in the circumferential direction of the annular hopper 2 is larger than the width D ₁ of the first portion 101 in the circumferential direction, for example as shown in FIG _. 8 .

In the above-described embodiment, the width D ₂ in the circumferential direction _of the second portion 102 is made relatively large, so that, for example, as shown in FIGS. Even if there is, the strength of the second portion 102 can be ensured.

In some embodiments, in a cross section including the extending direction and the vertical direction of the scraper 30, the cross-sectional area A _in of a region of the scraper 30 that is radially inner than the intermediate position Pc (see FIGS. 5 to 7) And, the cross-sectional area A of the portion of the scraper 30 that is radially inward from the straight line _L1 connecting the lower end 4b of the outer circumferential wall 4a and the outer circumferential end 12b of the annular table 12 in the area radially outward from the intermediate position Pc. The ratio A _in / _{A out (} see FIGS. 5 to 7) is 2/3 or more and 3/2 or less.

In the above-described embodiment, of the cross-sectional area of the portion where the scraper 30 can come into contact with the sintered ore 5 deposited on the annular table 12 below the annular hopper 2, the portion radially inner than the intermediate position Pc Since the ratio A _{in /} A _out of the cross-sectional area A in and the cross-sectional area A _out of the portion radially outer than the intermediate position Pc is set to 2/3 or more, the sintering in the inner circumferential area in the annular hopper 2 is It becomes easier to secure the scraped amount of ore 5. In addition, since the above ratio A _in /A _out is set to 3/2 or less, the amount of sintered ore 5 scraped off in the outer circumferential area in the annular hopper 2 is reduced, and the load in the outer circumferential area in the annular hopper 2 is reduced. It becomes easier to suppress the decline. Therefore, the unloading speed in the annular hopper 2 can be effectively equalized between the outer peripheral region and the inner peripheral region, and insufficient cooling and/or overcooling of the sintered ore 5 can be suppressed.

In some embodiments, for example, as shown in FIG. 8, the tip portion 103 of the scraper 30 is a tip extending in a direction oblique to the extending direction of the scraper 30 (direction of the center line of the scraper 30) in a plan view. It has a surface 32. Further, at the tip end 103 of the scraper 30, the tip surface 32 is connected to the flat lower surface 36A.

In this case, the tip surface 32 of the tip portion 103 extends obliquely with respect to the extending direction of the scraper 30 in plan view, and is connected to the flat lower surface 36A. By installing it along the inner peripheral wall 3a of the annular hopper 2, the granules accumulated on the annular table 12 are effectively guided to the outside in the radial direction, and the sintered ore 5 accumulated in the inner circumferential area of the annular hopper 2 is removed. can be scraped off reliably. Therefore, the unloading speed in the annular hopper 2 can be effectively equalized between the outer peripheral region and the inner peripheral region, and insufficient cooling and/or overcooling of the sintered ore 5 can be suppressed.

In addition, in plan view, the angle φ (see FIG. 8 ) may be 15 degrees or more and 45 degrees or less. By setting the angle φ within this range, when the scraper 30 is installed in the cooling device 1, the particulate matter accumulated on the annular table 12 can be effectively guided radially outward.

Hereinafter, an outline of a particulate material cooling device and a scraper according to some embodiments will be described.

(1) A granular material cooling device according to at least one embodiment of the present invention includes:
an annular hopper provided around a central axis and having an inner circumferential wall and an outer circumferential wall defining a receiving space for receiving supply of particulate matter;
an annular table provided around the central axis below the receiving space;
a cooling unit for supplying cooling fluid to the receiving space of the annular hopper;
a scraper provided between the annular hopper and the annular table,
The scraper is
a first portion located radially inward from an intermediate position between the inner circumferential wall and the outer circumferential wall;
a second portion of the scraper located within a range facing the annular table and radially outward from the intermediate position between the inner circumferential wall and the outer circumferential wall;
including;
A lower surface of the second portion of the scraper is located higher than a lower surface of the first portion.

When using a conventional scraper, that is, a scraper whose lower surface has a constant position in the vertical direction, the unloading speed tends to be high in the outer circumferential region of the annular hopper, and the unloading speed tends to be low in the inner circumferential region. In this case, the residence time of the granules in the annular hopper is relatively short in the outer circumferential region and relatively long in the inner circumferential region, so the temperature in the annular hopper (or the temperature of the granules in the annular hopper) is , is relatively high in the outer peripheral region and relatively low in the inner peripheral region.

In this regard, according to the configuration (1) above, since the second portion is provided radially outward from the intermediate position between the inner circumferential wall and the outer circumferential wall and has a lower surface higher than the lower surface of the first portion, Compared to the case where the second portion is not provided, it becomes easier to reduce the unloading speed in the outer circumferential region within the annular hopper.

More specifically, with the configuration (1) above, compared to a conventional scraper in which the position of the lower surface is constant in the vertical direction, the amount of granular material scraped at the radially outer side than the intermediate position (i.e., the amount of granular material scraped off is It is possible to relatively reduce the amount of discharge (discharge amount to the outside in the radial direction), thereby reducing the unloading speed of the outer circumferential region within the annular hopper. Alternatively, with the configuration (1) above, the second part having the lower surface at a relatively high place allows the radially outward path (gap) of the particulate matter in the inner circumferential area between the second part and the annular table. is ensured, and the particulate matter in the inner circumferential area can be smoothly discharged radially outward through this path, and the particulate matter that has come from the inner circumferential area to the gap prevents the load from falling in the outer circumferential area. Therefore, the unloading speed in the outer circumferential area can be relatively reduced.

Therefore, according to the configuration (1) above, it becomes easier to equalize the unloading speed in the annular hopper between the outer peripheral side region and the inner peripheral side region, and it becomes easier to suppress insufficient cooling and/or overcooling of granular materials. be able to.

(2) In some embodiments, in the configuration of (1) above,
The scraper satisfies H ₁ >H ₂ where the vertical dimension of the first portion is H ₁ and the vertical dimension of the second portion is H ₂ .

According to configuration (2) above, the vertical dimension H ₂ of the second portion, which is provided radially outward from the intermediate position and whose lower surface is relatively high, is the vertical dimension H ₁ of the first portion. Since it is made smaller than the above, it is possible to more reliably reduce the unloading speed of the outer circumference side region within the annular hopper. Therefore, the unloading speed in the annular hopper can be equalized between the outer circumference side region and the inner circumference side region, and insufficient cooling and/or overcooling of the particulate matter can be suppressed.

(3) In some embodiments, in the configuration of (1) or (2) above,
In the scraper, when the average value of the vertical dimension in the region between the intermediate position in the radial direction and the lower end of the inner circumferential wall is H _{in_ave} , and the vertical dimension of the second portion is _H2 , H _{in_ave} > H ₂ is satisfied.

According to the configuration (3) above, the vertical dimension H2 of the second portion, which is provided radially outward from the intermediate position and whose lower surface is relatively high, is defined as the vertical dimension _H2 between the radial intermediate position and the lower end of the inner circumferential wall. Since it is made smaller than the average value H _{in_ave} of the vertical dimension in the region between the two, it is possible to more reliably reduce the unloading speed in the outer circumferential region in the annular hopper. Therefore, the unloading speed in the annular hopper can be equalized between the outer circumference side region and the inner circumference side region, and insufficient cooling and/or overcooling of the particulate matter can be suppressed.

(4) In some embodiments, in any of the configurations (1) to (3) above,
The scraper has an average value of vertical dimensions in a region between the intermediate position in the radial direction and the lower end of the inner peripheral wall as H _{in_ave} , and an average value of the vertical dimension in the region between the intermediate position in the radial direction and the lower end of the outer peripheral wall When the average value of the vertical dimension in the region is H _{out_ave} , H _{in_ave} > H _{out_ave} is satisfied.

According to the configuration (4) above, the average value H _{out_ave} of the vertical dimension in the area between the intermediate position in the radial direction and the lower end of the outer peripheral wall is set to Since it is made smaller than the average value H _{in_ave} of the vertical dimension in the region, it is possible to more reliably reduce the unloading speed in the outer circumferential region in the annular hopper. Therefore, the unloading speed in the annular hopper can be equalized between the outer circumference side region and the inner circumference side region, and insufficient cooling and/or overcooling of the particulate matter can be suppressed.

(5) In some embodiments, in any of the configurations (1) to (4) above,
The scraper is
a tip including the first portion and having a flat lower surface facing the annular table;
an adjacent portion that includes the second portion, is provided adjacent to the tip portion on the radially outer side of the tip portion, and has a larger distance between the annular table and the lower surface than the tip portion; include.

According to the configuration (5) above, since the tip of the scraper including the first portion has a flat lower surface facing the annular table, the amount of granular material scraped in the inner peripheral area by the tip can be ensured. This facilitates the unloading of the inner circumferential area. Therefore, it becomes easier to equalize the unloading speed in the annular hopper between the outer circumference side region and the inner circumference side region, and it is possible to suppress insufficient cooling and/or overcooling of the particulate matter.

(6) In some embodiments, in the configuration of (5) above,
A boundary between the tip portion and the adjacent portion is located between the intermediate position and the lower end of the outer peripheral wall in the radial direction.

According to the configuration (6) above, the tip portion having a flat lower surface extends radially to the same level as the intermediate position or to the outer side in the radial direction, so that a sufficient length of the tip portion is ensured. This makes it easier to scrape off particulate matter in the inner peripheral area. Therefore, it becomes easier to equalize the unloading speed in the annular hopper between the outer circumference side region and the inner circumference side region, and it is possible to suppress insufficient cooling and/or overcooling of the particulate matter.

(7) In some embodiments, in the configuration of (6) above,
When the distance in the radial direction between the intermediate position and the lower end of the outer peripheral wall is W, the distance in the radial direction between the boundary and the lower end of the outer peripheral wall is 0.2 × W or more and W or less. It is.

According to configuration (7) above, since the distance in the radial direction between the boundary between the tip and the adjacent portion and the lower end of the outer peripheral wall is set to 0.2×W or more, the length of the adjacent portion including the second portion is This makes it possible to sufficiently reduce the amount of granular material scraped off in the outer circumference side area, making it easier to suppress unloading of the outer circumference side area in the annular hopper. Further, since the above-mentioned distance is set to be W or less, the length of the tip portion can be ensured, thereby making it easier to ensure the amount of particulate matter to be scraped off in the inner circumference side region. Therefore, according to the configuration (7) above, it is possible to effectively equalize the unloading speed in the annular hopper between the outer circumferential side area and the inner circumferential side area, thereby preventing insufficient cooling and/or overcooling of the granular materials. can be suppressed.

(8) In some embodiments, in any of the configurations (5) to (7) above,
The adjacent portion of the scraper extends in the radial direction over at least 30% of the area between the lower end of the outer peripheral wall and the outer peripheral end of the annular table.

In the space between the lower end of the outer circumferential wall in the vertical direction and the annular table, there is a region between the lower end of the outer circumferential wall in the radial direction and the outer circumferential end of the annular table (hereinafter also referred to as "hopper outer area"). The particles are deposited so as to form an angle of repose with the top surface of the annular table.
In this regard, according to the configuration (8) above, since the adjacent part whose lower surface is higher than the tip extends over 30% or more of the outside area of the hopper, the particulate matter accumulated in the outside area of the hopper is The amount of scraping can be reduced, thereby effectively reducing the unloading speed in the outer circumferential region within the annular hopper. Therefore, the unloading speed in the annular hopper can be more effectively equalized between the outer circumference side region and the inner circumference side region, and insufficient cooling and/or overcooling of the granular material can be suppressed.

(9) In some embodiments, in any of the configurations (5) to (8) above,
The adjacent portion of the scraper has a portion in which the distance in the vertical direction between the lower surface of the scraper and the upper surface of the annular table increases toward the outside in the radial direction.

According to the configuration (9) above, there is a portion in which the distance in the vertical direction between the lower surface of the adjacent portion and the upper surface of the annular table increases as it goes radially outward. In other words, in the adjacent part of the scraper, the amount of granular material scraped off becomes easier to reduce as the part goes radially outward, thereby effectively reducing the unloading speed in the outer circumferential area of the annular hopper. I can do it. Therefore, the unloading speed in the annular hopper can be more effectively equalized between the outer circumference side region and the inner circumference side region, and insufficient cooling and/or overcooling of the granular material can be suppressed.

(10) In some embodiments, in any of the configurations (1) to (9) above,
The upper surface of the scraper at the radial position of the lower end of the outer peripheral wall is located higher than the upper surface of the scraper at the intermediate position.

According to the configuration (10) above, the upper surface of the scraper in the radial direction at the lower end of the outer peripheral wall is located higher than the upper surface of the scraper at the intermediate position, so that the amount of accumulated granules to be scraped off in the area outside the hopper is This makes it easier to reduce Therefore, it is possible to effectively reduce the unloading speed of the outer peripheral side region inside the annular hopper.

(11) In some embodiments, in any of the configurations (1) to (10) above,
The width of the second portion in the circumferential direction of the annular hopper is larger than the width of the first portion in the circumferential direction.

According to the configuration (11) above, since the width of the second portion in the circumferential direction is made relatively large, it is possible to ensure the strength of the second portion while making the vertical dimension of the second portion relatively narrow. can.

(12) In some embodiments, in any of the configurations (1) to (11) above,
In a cross section including the extending direction and the vertical direction of the scraper, a cross-sectional area A _in of a region of the scraper that is radially inner than the intermediate position, and a region of the scraper that is radially outer than the intermediate position. The ratio A in /A out of the cross-sectional area A _out of a portion of the region that is radially inner than the straight line connecting the lower end of the outer peripheral wall and the _outer peripheral end of the annular table is _2/3 or more and 3/2 or less. It is.

According to the configuration (12) above, among the cross-sectional areas of the portion where the scraper can come into contact with the granules deposited on the table below the annular hopper, the cross-sectional area of the portion radially inner than the intermediate position Since the ratio _{A in /} A _out of the cross-sectional area A _out of the portion radially outer than the intermediate position is set to 2/3 or more, it becomes easier to ensure the amount of particulate matter scraped in the inner circumferential area. . Further, since the ratio A _in /A _out is set to 3/2 or less, the amount of granular material scraped off in the outer peripheral region is reduced, and it becomes easier to suppress the unloading of the outer peripheral region in the annular hopper. Therefore, according to the configuration (12) above, it is possible to effectively equalize the unloading speed in the annular hopper between the outer circumference side area and the inner circumference side area, thereby preventing insufficient cooling and/or overcooling of the granular materials. can be suppressed.

(13) In some embodiments, in any of the configurations (1) to (12) above,
In a cross section including the radial direction and the vertical direction, the angle between a straight line connecting the lower end of the outer peripheral wall and the outer peripheral end of the annular table and a straight line along the upper surface of the annular table is 15 degrees or more and 40 degrees or less It is.

According to configuration (13) above, granules are deposited on the annular table in the area outside the hopper so as to form an angle of repose. Therefore, by using the above-mentioned scraper to relatively reduce the amount of granular material scraped at the radially outer side than at the intermediate position, it is possible to effectively reduce the unloading speed in the outer circumferential area within the annular hopper. . Therefore, it becomes easier to equalize the unloading speed in the annular hopper between the outer peripheral side region and the inner peripheral side region, and it becomes easier to suppress insufficient cooling and/or overcooling of the granular material.

(14) The scraper according to at least one embodiment of the present invention includes:
A scraper for guiding particulate matter deposited on an annular table of a particulate matter cooling device to the outside in the radial direction of the annular table,
a tip having a flat lower surface;
an adjacent part adjacent to the tip in the extending direction of the scraper and having a lower surface located higher than the flat lower surface of the tip;
Equipped with

According to configuration (14) above, the adjacent portion adjacent to the tip has a lower surface located at a higher location than the flat lower surface of the tip, so that the adjacent portion has a flat lower surface within the range facing the annular table. It becomes easier to reduce the unloading speed of the outer circumferential side area in the annular hopper than when the annular hopper has the following. Therefore, it becomes easier to equalize the unloading speed in the annular hopper between the outer circumference side region and the inner circumference side region, and it is possible to suppress insufficient cooling and/or overcooling of the particulate matter.

(15) In some embodiments, in the configuration of (14) above,
The tip portion and the adjacent portion are located within a contact range of the scraper with the granular material.

According to the configuration (15) above, since the tip and the adjacent portion of the scraper are located within the range of contact with the granular material, it is possible to more reliably reduce the unloading speed in the outer circumferential area within the annular hopper. can. Therefore, the unloading speed in the annular hopper can be made more equal between the outer circumference side region and the inner circumference side region, and insufficient cooling and/or overcooling of the particulate matter can be suppressed.

(16) In some embodiments, in the configuration of (14) or (15) above,
The tip portion has a tip surface that is oblique to the extending direction of the scraper in plan view,
At the tip, the tip surface is connected to the flat lower surface.

According to configuration (16) above, the tip surface of the tip extends obliquely with respect to the extending direction of the scraper in plan view, and is connected to the flat lower surface. By installing the surface along the inner circumferential wall of the annular hopper, the particulate matter accumulated on the annular table is effectively guided to the outside in the radial direction, and the particulate matter accumulated on the inner circumferential side of the annular hopper is reliably scraped off. be able to. Therefore, the unloading speed in the annular hopper can be effectively equalized between the outer circumference side region and the inner circumference side region, and insufficient cooling and/or overcooling of the granular material can be suppressed.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and also includes forms in which modifications are made to the above-described embodiments and forms in which these forms are appropriately combined.

In this specification, expressions expressing relative or absolute arrangement such as "in a certain direction", "along a certain direction", "parallel", "perpendicular", "center", "concentric", or "coaxial" are used. shall not only strictly represent such an arrangement, but also represent a state in which they are relatively displaced with a tolerance or an angle or distance that allows the same function to be obtained.
For example, expressions such as "same,""equal," and "homogeneous" that indicate that things are in an equal state do not only mean that things are exactly equal, but also have tolerances or differences in the degree to which the same function can be obtained. It also represents the existing state.
In addition, in this specification, expressions expressing shapes such as a square shape or a cylindrical shape do not only mean shapes such as a square shape or a cylindrical shape in a strict geometric sense, but also within the range where the same effect can be obtained. , shall also represent shapes including uneven parts, chamfered parts, etc.
Furthermore, in this specification, the expressions "comprising,""including," or "having" one component are not exclusive expressions that exclude the presence of other components.

1 Cooling device 2 Annular hopper 3 Inner plate 3a Inner circumferential wall 3b Lower end 4 Outer plate 4a Outer circumferential wall 4b Lower end 5 Sintered ore 6 Receiving space 7 Inner louver 8 Outer louver 9 Central louver 10 Cooling section 12 Annular table 12a Inner circumferential end 12b Outer edge 13 Foundation 14 Center bearing 15 Rail 16 Support roller 17 Drive motor 18 Hood 19 Exhaust duct 20 Suction fan 21 Frame 22 Frame 23 Seal portion 24 Groove portion 25 Water 26 Sealing plate 27 Supply chute 29 Conveyor 30 Scraper 32 Tip surface 34 Upper surface 36, 36A, 36B Lower surface 101 First portion 102 Second portion 103 Tip portion 104 Adjacent portion LB Boundary O Central axis Pc Intermediate position

Claims (15)

an annular hopper provided around a central axis and having an inner circumferential wall and an outer circumferential wall defining a receiving space for receiving supply of particulate matter;
an annular table provided around the central axis below the receiving space;
a cooling unit for supplying cooling fluid to the receiving space of the annular hopper;
a scraper provided between the annular hopper and the annular table,
The scraper is
a first portion located radially inward from an intermediate position between the inner circumferential wall and the outer circumferential wall;
a second portion of the scraper located within a range facing the annular table and radially outward from the intermediate position between the inner circumferential wall and the outer circumferential wall;
including;
A cooling device for granular material, wherein a lower surface of the second portion of the scraper is located higher than a lower surface of the first portion. The granular material cooling device according to claim 1, wherein the scraper satisfies H1>H2, where H1 is the vertical dimension of the first portion and H2 is the vertical dimension of the second portion. When the average value of the vertical dimension of the scraper in the region between the intermediate position in the radial direction and the lower end of the inner circumferential wall is Hin_ave, and the vertical dimension of the second portion is H2, Hin_ave> The granular material cooling device according to claim 1 or 2, which satisfies H2. The scraper has an average value of vertical dimensions in a region between the intermediate position in the radial direction and the lower end of the inner peripheral wall as Hin_ave, and a region between the intermediate position in the radial direction and the lower end of the outer peripheral wall. The granular material cooling device according to any one of claims 1 to 3, wherein Hin_ave>Hout_ave is satisfied, where Hout_ave is the average value of the vertical dimension in . The scraper is
a tip including the first portion and having a flat lower surface facing the annular table;
an adjacent portion including the second portion and provided adjacent to the tip portion on the radially outer side of the tip portion;
The lower surface of the adjacent portion has a greater distance from the annular table than the lower surface of the tip portion,
The granular material cooling device according to any one of claims 1 to 4, wherein the tip portion is provided such that the lower surface of the tip portion extends along a plane parallel to the upper surface of the annular table. The granular material cooling device according to claim 5, wherein a boundary between the tip portion and the adjacent portion is located between the intermediate position and the lower end of the outer peripheral wall in the radial direction. When the distance in the radial direction between the intermediate position and the lower end of the outer peripheral wall is W, the distance in the radial direction between the boundary and the lower end of the outer peripheral wall is 0.2 × W or more and W or less. A cooling device for granular materials according to claim 6. Any one of claims 5 to 7, wherein the adjacent portion of the scraper extends in the radial direction over at least 30% of the area between the lower end of the outer peripheral wall and the outer peripheral end of the annular table. The cooling device for granular materials according to item 1. 9. The adjacent portion of the scraper has a portion in which the distance in the vertical direction between the lower surface of the scraper and the upper surface of the annular table increases as it goes radially outward. Cooling device for granular materials as described. The granular material cooling device according to any one of claims 1 to 9, wherein the upper surface of the scraper at a radial position of the lower end of the outer peripheral wall is located higher than the upper surface of the scraper at the intermediate position. The granular material cooling device according to any one of claims 1 to 10, wherein the width of the second portion in the circumferential direction of the annular hopper is larger than the width of the first portion in the circumferential direction. In a cross section including the extending direction and the vertical direction of the scraper, a cross-sectional area Ain of a region of the scraper that is radially inner than the intermediate position, and a region of the scraper that is radially outer than the intermediate position. A ratio Ain/Aout of a cross-sectional area Aout of a portion radially inner than a straight line connecting the lower end of the outer peripheral wall and the outer peripheral end of the annular table is 2/3 or more and 3/2 or less. 12. The granular material cooling device according to any one of 1 to 11. In a cross section including the radial direction and the vertical direction, the angle between a straight line connecting the lower end of the outer peripheral wall and the outer peripheral end of the annular table and a straight line along the upper surface of the annular table is 15 degrees or more and 40 degrees or less The granular material cooling device according to any one of claims 1 to 12. A scraper for guiding particulate matter deposited on an annular table of a particulate matter cooling device to the outside in the radial direction of the annular table,
a tip having a flat lower surface;
an adjacent part adjacent to the tip in the extending direction of the scraper and having a lower surface located higher than the flat lower surface of the tip;
Equipped with
The tip portion and the adjacent portion are located within a contact range with the granular material of the scraper,
The tip portion is a scraper provided such that the lower surface of the tip portion extends along a plane parallel to the upper surface of the annular table. The tip portion has a tip surface that is oblique to the extending direction of the scraper in plan view,
15. The scraper according to claim 14, wherein at the tip end, the tip surface is connected to the flat lower surface.

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