JP2022006787A - Cooling machine for sintered ore - Google Patents

Abstract

To provide a cooling machine for sintered ores capable of effectively performing the cooling of sintered ores over all layers without using water for cooling.SOLUTION: A cooling machine 1 for sintered ores relating to this invention laminates sintered ores 5 sintered by a sintering machine on a trough truck 3, and continuously cools the sintered ores 5 while moving the trough truck 3, and comprises: a lower cooling device 27 for performing lower charge cooling by ventilating from the lower part to the upper part into the layer of each sintered ore 5; and an upper cooling device 29 for performing upper charge cooling by discharging a cooling gas toward the upper side surface of each sintered ore 5. The upper cooling device 29 comprises: a hollow discharge part 34 provided with a discharge port 37 for the cooling gas and arranged at the upper part of the trough truck 3 in such a manner that the discharge port 37 and the upper side surface of each sintered ore 5 are confronted; and a cooling gas feed device 36 connected to the discharge part 34 via a duct 35 and feeding the cooling gas to the discharge part 34 under positive pressure via the duct 35.SELECTED DRAWING: Figure 1

Description

According to the present invention, a sinter that is sintered by a sinter and crushed by a crusher is laminated on a trough carriage, and the sinter is continuously cooled while the trough carriage is moved. Regarding the cooler.

Conventionally, a cooler that cools by introducing cooling air from below into a layer of sinter laminated on a trough trolley that moves on an annular or linear rail and ventilating it upward. Widely used.

A conventional example of such a sinter cooling machine will be described with reference to FIG.
In the conventional sinter cooler 71 shown in FIG. 13, the crushed sinter 5 is laminated on the trough carriage 3 that moves along the annular movement path, and the sinter 5 is laminated from the mining device side to the mining device side. The sinter 5 is cooled by cooling air while it is being moved to.

The trough trolley 3 includes a trough 9 movably arranged via wheels 7 on a pair of left and right guide rails (not shown) laid along a movement path, an inner side wall 11 and an outer side wall 13, and a trough trolley 3. A wind box 15 provided at the bottom of the wind box 15 and a ventilation plate 17 having a large number of ventilation holes arranged on the upper surface of the wind box 15 are provided.
Further, a movable side annular air duct 21 is connected to the inner side wall 11 via a connecting air duct 19. The upper surface of the movable-side annular air duct 21 is opened along a circular movement path, and is communicated with the air box 15 of the trough bogie 3 via the connecting air duct 19.
The movable side annular air duct 21 is connected to the fixed side annular air duct 25 via a water sealing box 23 formed inside the movable side annular air duct 21. The cooling gas supplied to the fixed side annular air duct 25 is sealed by the water sealing box 23 and supplied to the movable side annular air duct 21.

The trough bogie 3 moves from the mining side to the mining side, and the cooling gas supplied from the fixed side annular air duct 25 in the moving process is laminated on the trough bogie 3 via the connecting air duct 19 and the air box 15. It is ventilated to the sinter 5 that has been made.
The temperature of the cooling gas (air) ventilated in the sinter 5 rises due to heat exchange, and when it reaches the upper surface of the sinter 5, the temperature difference from the sinter 5 is smaller than that at the time of introduction. Become. Therefore, there is a problem that the upper surface of the sinter 5 is difficult to cool by cooling only with air.
Therefore, a method of including mist or fog in the cooling air (see Patent Document 1 and Patent Document 2) and a method of sprinkling water from the upper part of the sinter on the discharge side (see Patent Document 3) have been proposed.

JP-A-59-28535 Japanese Unexamined Patent Publication No. 2001-220625 Japanese Unexamined Patent Publication No. 2018-204043

However, in these conventional methods, there is a possibility that the sinter 5 is subjected to a thermal shock due to rapid cooling with water, resulting in a decrease in the strength of the sinter 5. In particular, since the sinter 5 has a variation in particle size and the sinter 5 having a large particle size also exists, even in a region where the temperature of the sinter 5 is lowered to a certain temperature or less on average. The sinter 5 having a large particle size is in a higher temperature state than the sinter 5 having a small particle size, and may be subjected to a thermal impact due to contact with water.

Further, the use of water may cause deterioration of the equipment, that is, deformation of the equipment due to rusting and quenching together with the sinter 5.
In addition, since the particle size and transport amount of the product vary, the amount of water (mist / fog) used for cooling should have a certain margin with respect to the required amount in order to avoid unachieved cooling. It may be provided. For this reason, residual water that has not been vaporized causes significant rusting, and water collection equipment may be required from the viewpoint of protecting foundations and structures, which is a factor that raises the equipment price.

The present invention has been made to solve such a problem, and cooling of a sinter can be effectively performed over all layers without using water for cooling. The purpose is to provide an opportunity.

(1) In the sinter cooling machine according to the present invention, the sinter that has been sintered by the sinter is laminated on a trough carriage, and the sinter is continuously cooled while the trough carriage is moved. To do
A downward cooling device for performing downward air supply cooling by ventilating from the lower side to the upper side in the layer of the sinter, and a lower cooling device.
It is provided with an upper cooling device for performing upper air supply cooling by discharging cooling gas toward the upper surface of the sinter.
The upper cooling device is provided with a discharge port for the cooling gas, and has a hollow discharge portion arranged above the trough carriage so that the discharge port and the upper surface of the sinter face each other, and the discharge. It is characterized by having a cooling gas supply device which is connected to the portion via a duct and supplies the cooling gas to the discharge portion at a positive pressure through the duct.

(2) Further, in the sinter cooling machine according to (1) above, the upper cooling device is provided in the latter half of the entire region for cooling the sinter in the traveling direction of the trough carriage. It is preferable to have.

(3) Further, in the sinter cooling machine according to the above (1) or (2), the sinter is located in a region provided with an upper cooling device in the entire region for cooling the sinter. It is preferable to further include a residual gas suction device configured to suck the residual gas in the cooler including the cooling gas discharged toward the upper surface of the sinter and in contact with the sinter.

(4) Further, in the sinter cooling machine according to (3) above, the residual gas suction device has a downward suction device configured to suck the residual gas from the lower side of the sinter. Is preferable.

(5) Further, in the sinter cooling machine according to (3) or (4), the residual gas suction device is an upper suction device configured to suck the residual gas from the upper side of the sinter. Is preferable to have.

(6) Further, in the sinter cooling machine according to any one of (1) to (4), the above-mentioned region in which the upper cooling device is provided in the entire region for cooling the sinter. Further equipped with a hood that covers the top of the trough trolley,
It is preferable that the discharge portion of the upper cooling device is arranged between the trough carriage and the hood.

(7) Further, in the sintered ore cooler according to (5) above, the upper suction device has a suction portion arranged in the vicinity of the discharge portion of the upper cooling device and a suction duct in the suction portion. It is provided with a negative pressure generator which is connected via a suction duct and sucks the residual gas at a negative pressure through the suction duct.
A hood that covers the upper part of the trough carriage is further provided in the area provided with the upper cooling device in the entire area for cooling the sinter.
It is preferable that the discharge portion of the upper cooling device and the suction portion of the upper suction device are arranged between the trough carriage and the hood.

(8) Further, in the sinter cooling machine according to any one of (1) to (7) above, a discharge section elevating device for adjusting the vertical position of the discharge section of the upper cooling device is further provided. Is preferable.

(9) Further, in the sinter cooling machine according to (7) above, it is preferable to further include a suction unit elevating device for adjusting the vertical position of the suction unit of the upper suction device.

The sinter cooler provides a downward cooling device for lower air supply cooling by ventilating the sinter layer from bottom to top, and cooling gas toward the upper surface of the sinter. The upper cooling device is provided with an upper cooling device for cooling the upper air supply by discharging, and the upper cooling device is provided with a discharge port for the cooling gas, and the discharge port and the upper surface of the sinter face each other. A hollow discharge portion arranged above the trough trolley, a cooling gas supply device connected to the discharge portion via a duct, and a cooling gas supply device that supplies the cooling gas to the discharge portion at a positive pressure through the duct. By having the above, the sinter can be effectively cooled over the entire layer without using water for cooling.

It is a schematic sectional drawing of the sinter cooling machine which concerns on Embodiment 1 of this invention. It is a perspective view of the discharge part and the suction part of the sinter cooling machine which concerns on Embodiment 1 of this invention, (a) shows the discharge part, and (b) shows the suction part. It is a schematic plan view of the sinter cooling machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the modification which changed the shape of the discharge part of the sinter cooling machine which concerns on Embodiment 1 of this invention, and (a) to (c) show modification examples 1 to 3, respectively. .. It is a schematic sectional drawing which shows another modification (modification example 4) of the sinter cooling machine which concerns on Embodiment 1 of this invention. It is a schematic sectional drawing which shows another modification (modification example 5) of the sinter cooling machine which concerns on Embodiment 1 of this invention. It is a schematic sectional drawing of the sinter cooling machine which concerns on Embodiment 2 of this invention. It is a schematic plan view of the sinter cooling machine which concerns on Embodiment 2 of this invention. It is a schematic sectional drawing of the sinter cooling machine which concerns on Embodiment 3 of this invention. It is a schematic diagram which shows the modification which changed the structure of the discharge part elevating device and the suction part elevating device of the sinter cooling machine which concerns on Embodiment 3 of this invention, and (a)-(b) are the modification examples respectively. 6 to 7 are shown. It is a schematic sectional drawing of the sinter cooling machine which concerns on Embodiment 4 of this invention. It is a schematic sectional drawing of the sinter cooling machine which concerns on Embodiment 5 of this invention. It is a schematic sectional drawing of the cooling machine of the conventional sinter.

[Embodiment 1]
The sinter cooler 1 according to the present embodiment will be described with reference to FIGS. 1 to 3. Note that FIG. 1 is a schematic cross-sectional view corresponding to the cross section taken along the line AA in FIG. The parts corresponding to the configurations of the conventional example shown in FIG. 13 are designated by the same reference numerals.
As shown in FIGS. 1 to 3, the sinter cooler 1 according to the present embodiment has the sinter 5 sintered and crushed by the sinter on the trough trolley 3, and the sinter trolley 3 is laminated. The sinter 5 is continuously cooled while the 3 is moved in a ring shape, and the sinter cooling is performed downward for cooling the lower air supply by aerating the sinter 5 from the lower side to the upper side. The device 27, the upper cooling device 29 for performing upper air supply cooling by discharging the cooling gas toward the upper surface (hereinafter, also referred to as “upper surface”) of the sinter 5, and the residual gas so as to be sucked. It includes an upper suction device 31 that functions as a configured residual gas suction device.
Hereinafter, each configuration will be described in detail.

<Trough trolley>
The trough carriage 3 includes wheels 7, a trough 9, an inner side wall 11, an outer side wall 13, a wind box 15, and a ventilation plate 17, and is crushed above the ventilation plate 17, as in the conventional example. The sinter 5 is laminated.
Further, the trough carriage 3 moves the region partitioned in an annular shape from the mining device 32 side to the mining device 33 side along a rail (not shown) as shown in FIG.

<Downward cooling device>
The lower cooling device 27 is a device for performing lower air supply cooling by ventilating the layer of the sinter 5 from the lower side to the upper side.
In the present embodiment, the blower 36, the duct 35 through which the cooling gas blown from the blower 36 is ventilated, the fixed side annular air duct 25, the movable side annular air duct 21, the connecting air duct 19, and the trough trolley 3 are ventilated. The air box 15 provided below the plate 17 and introducing the cooling gas functions as the lower cooling device 27.

As shown in FIG. 3, the lower cooling device 27 of the present embodiment is a mining device 33 that discharges the sinter 5 of the sinter 3 from the mining device 32 that supplies the sinter 5 to the trough trolley 3. It is provided over almost the entire circumference of the cooling zone (the region for cooling the sinter in the cooler).
In FIG. 3, the annular cooling zone is divided into two and referred to as a cooling zone first half portion and a cooling zone second half portion, but the lower cooling device 27 of the present embodiment is the cooling zone first half. It is provided in both the cooling zone of the portion and the latter half of the cooling zone, that is, the entire cooling zone.

<Upper cooling device>
The upper cooling device 29 is a device for performing upper air supply cooling by discharging cooling gas toward the upper surface of the sinter 5.

In the lower air supply cooling, as described above, the temperature of the cooling gas (air) ventilated in the sinter rises due to heat exchange with the sinter, and when it reaches the upper surface of the sinter, it is burned. The temperature difference from the sinter is smaller than that at the time of introduction. Therefore, when the lower air supply cooling is performed in the entire cooling zone, the upper surface of the sinter is difficult to cool. Therefore, by performing upper air supply cooling at least in a part of the cooling zone, it is possible to uniformly cool the upper layer to the lower layer of the sinter without impairing the strength of the sinter by water cooling. At the same time, high cooling efficiency can be obtained.

The upper cooling device 29 of the present embodiment is connected to a discharge unit 34 which is arranged above the trough carriage 3 and discharges cooling gas via a duct 35, and discharges cooling gas through the duct 35. It includes a blower 36 that functions as a cooling gas supply device that supplies the 34 with a positive pressure. That is, in the present embodiment, the blower 36 functions as one component of the lower cooling device 27 and also functions as a cooling gas supply device which is a component of the upper cooling device 29. However, in the present invention, a cooling gas supply device may be provided separately from the blower included in the lower cooling device, and the cooling gas supply system may be a separate system for the upper cooling device and the lower cooling device.

As shown in FIG. 2A, for example, the discharge unit 34 is made of a hollow box body, and the cooling gas discharge port is on the surface of the hollow box body facing the upper surface of the sinter 5 (lower surface of the hollow box body). 37 is formed.

The discharge portion 34 preferably has a dimension in a direction orthogonal to the traveling direction of the sinter (trough carriage 3) (hereinafter, “width direction”) of about 1/2 to 3/4 of the width of the trough carriage 3. If this dimension is too small, it will be difficult to distribute the cooling gas to the upper surface of the sinter. On the other hand, if it is too large, there will be no space for installing the suction unit 39 described later, and if the suction unit 39 is not provided, it will remain in the cooler unless the downward suction described in another embodiment is performed. The escape of residual gas becomes worse. However, when the downward suction is performed without providing the upper suction device, the above-mentioned dimensions of the discharge portion 34 may be about the same as the width of the trough carriage 3.

The discharge ports 37 of the present embodiment are a large number of circular holes, and are arranged at equal intervals over substantially the entire length of the discharge portion 34 in the width direction. It is preferable that the discharge port 37 is formed as close to both ends in the width direction of the discharge portion 34 as possible.

By spraying the cooling gas from the discharge portion 34 onto the upper surface of the sinter 5, it is possible to promote the cooling of the upper surface of the sinter 5, which has a relatively high temperature.

The closer to the draining device 33 in the cooling zone, the smaller the temperature difference between the cooling gas and the sinter 5, and the lower the cooling efficiency. Therefore, the cooling efficiency is lowered by gradually increasing the gas flow rate to the discharge unit 34 provided on the side close to the mining device 33, gradually increasing the hole diameter of the central discharge port 37, or making the hole pitch dense. Is suppressed and efficient cooling is possible.
Further, it is considered that the sinter temperature at both ends is lower than that in the center in the width direction due to radiative cooling from the side wall in the trough width direction. Therefore, efficient cooling can be achieved by gradually reducing the hole diameter of the central discharge port 37 toward both ends or by making the hole pitch sparse.

As shown in FIG. 3, the upper cooling device 29 in the present embodiment is provided in the latter half of the cooling zone. The reason why the upper cooling device 29 is provided in the latter half of the cooling zone is as follows.

Since the first half of the cooling zone is close to the ore supply device 32, the sinter on the trough carriage 3 has not yet been cooled and the whole is hot, and the cooling gas after heat exchange with this high temperature sinter is also. It is hot. However, since the sinter is cooled to a certain extent in the latter half of the cooling zone, the cooling gas that has exchanged heat with the sinter is also relatively low. Therefore, by providing the discharge portion 34 and the suction portion 39 in the latter half portion, the thermal deformation of these main body portions can be reduced, and general-purpose products can be used for the non-metal parts (sealing material, etc.) used for these. It can be economical. Therefore, the upper cooling device 29 is preferably provided in the latter half of the cooling zone in the traveling direction of the trough carriage 3, and more preferably about 1/3 of the most downstream portion of the cooling zone in the traveling direction of the trough carriage 3. It is to be provided in.

<Residual gas suction device>
The residual gas suction device includes a cooling gas discharged toward the upper surface of the sinter 5 and in contact with the sinter 5, and a gas supplied from the lower cooling device 27 and passed through the layer of the sinter 5. , Suction the residual gas in the cooler.

The residual gas suction device of the present embodiment has an upper suction device 31 configured to suck the residual gas from the upper side of the sintered ore 5, and the upper suction device 31 is a region provided with the upper cooling device 29. In the suction section 39, which is installed near the discharge section 34 for discharging the cooling gas and sucks the residual gas existing above the upper surface of the sintered ore 5 from above the sintered ore 5, and the suction section 39. It is connected via a duct 41 and includes a blower 42 that functions as a negative pressure generator for sucking residual gas at a negative pressure through the suction duct 41.
As shown in FIG. 2B, for example, the suction portion 39 is provided with a bottomless box body in which the side (lower side) facing the upper surface of the sinter 5 is open and the upper portion is connected to the suction duct 41. Can be configured.

The upper suction device 31 is provided in a region of the entire cooling zone for cooling the sinter 5 in which the upper cooling device 29 is provided.
In the present embodiment, the suction unit 39 is provided in the vicinity of the discharge unit 34 for discharging the cooling gas, so that the suction unit 39 collides with the upper surface of the sinter 5 and then stagnates in the vicinity of the upper surface of the sinter 5. Residual gas can be removed. This makes it possible to promote the cooling of the sinter 5 by the cooling gas discharged from the discharge unit 34.

The arrangement of the discharge unit 34 and the suction unit 39 is not limited to the one in which the suction unit 39 is provided on both sides of the discharge unit 34 as shown in FIG. The arrangement of the discharge unit 34 and the suction unit 39 and the number thereof can be determined based on the temperature distribution characteristics in the width direction of the sinter 5 due to the trough structure and the like, the flow characteristics of the cooling gas from the upper surface, and the like. good.
For example, the suction unit 39 may be provided on one side of the discharge unit 34, or a plurality of discharge units 34 may be provided and the suction unit 39 may be provided so as to sandwich the discharge unit 34.

The operation of the sinter cooler 1 of the present embodiment configured as described above will be described.
The sinter 5 discharged from the sinter is sequentially laminated on a plurality of trough carts 3 from the sinter supply device 32 of the sinter cooler 1.
Each trough trolley 3 moves in an annular cooling zone along a rail toward the mining device 33. In the first half of the cooling zone in the cooling zone, as shown in FIG. 3, the cooling gas is introduced into the air box 15 of the trough bogie 3 via the lower cooling device 27, and the lower air supply cooling is performed. The cooling gas introduced into the air box 15 passes through the ventilation plate 17 and rises in the layer of the sinter 5 laminated on the ventilation plate 17 to cool the sinter 5.

In the present embodiment, since the residual gas suction device is not provided in the first half of the cooling zone, the cooling gas released from the upper layer of the sinter 5 is released to the atmosphere. However, since the cooling gas (exhaust gas) released in the first half of the cooling zone has a high temperature, it is necessary to install an exhaust heat recovery facility that recovers the exhaust gas from this part without releasing it to the atmosphere and recovers heat from this exhaust gas. You may do it.

In the present embodiment, in the latter half of the cooling zone, upper air supply cooling is performed in addition to lower air supply cooling. In the upper air supply cooling, the upper layer portion of the sinter 5 is cooled by blowing a cooling gas from the discharge portion 34 in the upper cooling device 29 onto the upper surface of the sinter 5.
In the latter half of the cooling zone, the temperature of the sinter 5 is lowered to some extent, and the temperature difference from the cooling gas is small, so that the cooling efficiency is deteriorated. In particular, the cooling efficiency of the sinter 5 in the upper layer deteriorates only by cooling the lower air supply, but by cooling the upper air supply, the sinter 5 in the upper layer, which is hotter than the lower layer, is cooled. Can be promoted.

In the latter half of the cooling zone, a residual gas suction device (upper suction device 31) having a suction portion 39 is provided, so that the cooling gas used for lower air supply cooling or above the upper surface of the sinter 5 is provided. The stagnant residual gas is sucked and discharged.
Thereby, the upper air supply cooling and the lower air supply cooling can be promoted.

When the trough trolley 3 reaches the excretion device 33 after passing through the latter half of the cooling zone, the cooled sintered ore 5 is excreted on the belt conveyor (not shown) by the excretion device 33, and is discharged by the belt conveyor. It is transported to the next process.

As described above, according to the sinter cooler 1 of the present embodiment, the entire sinter 5 without using water for cooling the sinter discharged while the temperature remains high. Cooling can be done effectively.

Further, the sinter cooler 1 of the present embodiment only adds an upper cooling device 29 and an upper suction device 31 to the latter half of the cooling zone with respect to the existing water-sealed circular cooler. It is also possible to achieve this, and it is also excellent in that it does not require new installation or major remodeling of the entire equipment.

[Modifications 1 to 3]
The discharge unit 34 of the upper cooling device 29 of the first embodiment is not limited to that shown in FIG. 2 (a). 4 (a) to 4 (c) show modified examples of this embodiment. For example, like the discharge unit 34 shown in FIG. 4 (a), the hollow box body is provided with a slit as a discharge port 37, or the discharge unit 34 shown in FIGS. 4 (b) and 4 (c). In addition, a plurality of circular holes may be formed in the lower surface of the discharge portion 34 of the hollow cylinder along the longitudinal direction, or a slit may be provided along the longitudinal direction. Further, the discharge portion 34 may not be a single hollow body, but a plurality of hollow bodies as shown in FIGS. 2 (a) and 4 (a) to 4 (c) may be arranged side by side.

When the discharge port 37 is a slit, the gas flow rate is gradually increased toward the mining device 33 side in the cooling zone, and the slit width is increased or the slit pitch is reduced to reduce the slit pitch. It is preferable to increase the cooling efficiency of the cooling zone near the 33 side.

[Modification 4]
FIG. 5 is a schematic cross-sectional view showing another modification of the sinter cooling machine according to the first embodiment. As shown in FIG. 5, a flow rate adjusting device 45 for adjusting the amount of gas passing through the cooling gas supply line and the residual gas suction line is provided so as to adjust the cooling gas supply amount and the residual gas suction amount. You may.
As a result, the amount of cooling gas to be supplied and the amount of residual gas to be sucked can be adjusted, and efficient cooling becomes possible.
Further, since the cooling gas supply line and the residual gas suction line are branched into a large number, the flow rate adjusting device 45 can be provided in each of the branched branch lines to reduce the cooling gas supply amount and the residual gas suction amount. It can be adjusted for each branch line, enabling more efficient cooling.

[Modification 5]
FIG. 6 is a schematic cross-sectional view showing still another modification of the sinter cooler according to the first embodiment. As shown in FIG. 6, the residual gas may be released to the atmosphere without providing the residual gas suction device.

[Embodiment 2]
The sinter cooler 46 according to the present embodiment will be described with reference to FIGS. 7 and 8. As shown in FIGS. 7 and 8, the sinter cooler 46 according to the present embodiment performs upper air supply cooling and lower air supply cooling in the first half of the cooling zone, and performs upper air supply cooling and lower air supply cooling in the latter half of the cooling zone. It is the same as the first embodiment except that only the upper air supply cooling is performed. Note that FIG. 7 is a schematic cross-sectional view corresponding to the cross section taken along the line BB in FIG. The same parts as those in the first embodiment shown in FIGS. 1 to 3 are designated by the same reference numerals.

In the latter half of the cooling zone where only the upper air supply cooling is performed, as shown in FIGS. 7 and 8, the residual gas suction device has the lower suction device 40, and the residual gas is also collected from the lower side of the sinter 5. It is designed to suck. In the present embodiment, the downward suction device 40 includes a wind box 15, a connecting air duct 19, a movable side annular air duct 21, a fixed side annular air duct 25, and a suction duct 41 provided below the ventilation plate 17 of the trough bogie 3. It includes a blower 42. That is, the air box 15, the connecting air duct 19, and the movable side annular air duct 21 function as a part of the lower suction device in the latter half of the cooling zone and as a part of the lower cooling device in the first half of the cooling zone. Further, in the fixed side annular air duct 25, the first half portion and the second half portion of the cooling zone are partitioned by a partition plate 44, and the portion corresponding to the first half portion of the cooling zone functions as a part of the lower cooling device. The portion corresponding to the latter half of the cooling zone functions as a part of the lower suction device.

In the latter half of the cooling zone, the sinter 5 has poor cooling efficiency due to the lower air supply cooling, but according to the sinter cooler 46 of the present embodiment, in the latter half of the cooling zone. By using the upper cooling device 29 and the lower suction device 40 together for upper air supply cooling, a large amount of cooling gas is supplied to the upper surface of the sinter 5, and the layer of the sinter 5 is directed from above to below. It can be aerated, and the upper layer can be efficiently cooled to effectively lower the temperature of the upper layer.

[Embodiment 3]
The sinter 48 according to the present embodiment will be described with reference to FIG. FIG. 9 is a schematic cross-sectional view of the sinter 48 according to the present embodiment. The sintered ore cooler 48 according to the present embodiment has a discharge unit elevating device 49 for adjusting the vertical position of the discharge unit 34 for discharging the cooling gas, and a vertical position of the suction unit 39 for sucking the residual gas. It is the same as the first embodiment or the second embodiment except that the suction unit elevating device 51 for adjusting is provided.
The discharge unit elevating device 49 and the suction unit elevating device 51 can be configured by a jack attached to the fixing unit 53 as shown in FIG. As the jack, a manual one or an electric one can be used.

By providing the discharge unit elevating device 49 and the suction unit elevating device 51, the vertical positions of the discharge unit 34 and the suction unit 39 can be adjusted according to the cooling condition of the sinter 5.
For example, when the cooling capacity becomes insufficient due to the particle size of the sinter or the layer thickness of the sinter 5, the distance between the upper surface of the sinter 5 and the discharge portion 34 is reduced, and the surface of the sinter 5 of the cooled gas is reduced. The distance between the upper surface of the sinter 5 and the suction portion 39 is also reduced in order to reduce the stagnation in the sinter. This makes it possible to eliminate the lack of cooling capacity due to variations in the sinter grain size and the layer thickness of the sinter 5.

In addition, even when it becomes necessary to increase the cooling capacity due to an increase in production volume, by reducing the distance between the discharge unit 34 and the upper surface of the sinter 5, a large-scale change such as a change in the cooling fan or cooling duct is performed. The cooling capacity can be increased without making any changes.

Regarding the distance between the discharge unit 34 and the upper surface of the sinter 5 of the suction unit 39, it is preferable that the discharge unit 34 is closer to the upper surface of the sinter 5 than the suction unit 39. As a result, it is possible to prevent the cooling gas discharged from the discharge unit 34 from being directly sucked by the suction unit 39 before colliding with the upper surface of the sinter 5.

[Variations 6 to 7]
FIG. 10 is a schematic view showing a modified example in which the configurations of the discharge unit elevating device and the suction unit elevating device of the sinter 48 cooler according to the third embodiment are changed, and FIGS. 10 (a) to 10 (b) are shown. Indicates Modifications 1 and 2, respectively. The discharge unit elevating device 49 and the suction unit elevating device 51 may be configured by a hanging tool such as a chain block as shown in FIG. 10 (a), or may be a hanger type as shown in FIG. 10 (b). You may. The hanger type is a plate member 59 that extends downward from the fixing portion 53 and is provided with a plate member 57 having a plurality of bolt holes 55 in the axial direction, and the discharge portion 34 and the suction portion 39 also have the bolt holes 55. Is attached, and the discharge portion 34 and the suction portion 39 are suspended and supported by bolts 61 at desired positions.

[Embodiment 4]
The sinter cooling machine 62 according to the present embodiment will be described with reference to FIG. FIG. 11 is a schematic cross-sectional view of the sinter cooler 62 according to the present embodiment. The sinter cooler 62 is provided with a hood 63 that covers the upper part of the trough trolley 3 as shown in FIG. 11 in the area where the upper cooling device 29 is provided in the entire area for cooling the sinter 5. Is the same as that of the first embodiment or the second embodiment.
In order to keep the space between the hood 63 on the fixed side and the trough carriage 3 on the movable side hermetically sealed, it is desirable to provide a seal mechanism 65 between them. As the sealing mechanism 65, a labyrinth type composed of a plurality of movable plates, a water sealing type, a pressing type in which a heat-resistant cloth is pressed against a movable surface, and the like can be applied. In this embodiment, the case of a water-sealed type is shown.

The discharge portion 34 of the upper cooling device 29 and the suction portion 39 of the upper suction device 31 are arranged between the trough carriage 3 and the hood 63.
By providing the hood 63 and arranging the discharge unit 34 and the suction unit 39 as described above, dust such as the sinter 5 generated by the collision of the cooling gas with the sinter 5 leaks to the outside of the cooler. Can be prevented.
Further, since the suction unit 39 is inside the hood 63, the inside of the hood 63 can be sucked and the pressure inside the hood 63 can be kept at a pressure lower than the atmospheric pressure, and the effect of preventing dust leakage can be enhanced.

Further, also in the present embodiment, as in the third embodiment, the discharge unit elevating device 49 for adjusting the vertical position of the discharge unit 34 for discharging the cooling gas and the suction unit for adjusting the vertical position of the suction unit 39. It may be provided with an elevating device 51.

[Embodiment 5]
The sinter cooler 66 according to the present embodiment will be described with reference to FIG. FIG. 12 is a schematic cross-sectional view of the sinter cooler 66 according to the present embodiment. The sinter cooler 66 according to the present embodiment is carried out except that the suction unit 39 is not provided in the hood 63 but the discharge unit 34 is provided and the suction duct 41 is connected to the hood 63 itself. It is the same as the form 4 of.
In the present embodiment, the upper suction device 31 includes a hood 63, a suction duct 41, and a blower 42. According to the present embodiment, since it is not necessary to separately provide the suction unit 39, the equipment can be simplified as compared with the fourth embodiment.

Further, also in the present embodiment, the discharge unit elevating device 49 for adjusting the vertical position of the discharge unit 34 for discharging the cooling gas in the third embodiment may be provided.

In the above embodiments 1 to 5, the mode in which the trough carriage 3 moves in an annular shape has been described as an example, but in the present invention, the sinter in which the trough carriage moves in an annular shape is cooled. It is suitably applicable not only to a machine but also to a cooler that moves linearly.

Although the present invention has been described above using the embodiments, the present invention is not limited to the configurations of these embodiments. The scope of the present invention is determined based on the description of the appended claims, and within the scope of the invention, some of the components shown in the embodiments are omitted or modified, or the components are improved. All are included in the present invention. For example, in the above embodiments 1 to 5, the case where the present invention is applied to the water-sealed cooler is shown, but the application target of the present invention is not limited to the water-sealed cooler. Further, in these embodiments, the embodiment in which the trough trolley 3 moves in an annular shape has been described as an example, but the present invention is not limited to the sinter cooling machine in which the trough trolley moves in an annular shape. It is also suitably applicable to a cooler that moves linearly.

1 Sintered ore cooler (Embodiment 1)
3 Trough trolley 5 Sintered ore 7 Wheels 9 Trough 11 Inner side wall 13 Outer side wall 15 Air box 17 Ventilation plate 19 Connecting air duct 21 Moving side annular air duct 23 Water sealing box 25 Fixed side annular air duct 27 Lower cooling device 29 Upper cooling device 31 Upper Suction device (residual gas suction device)
32 Mining equipment 33 Mining equipment 34 Discharge unit 35 Duct 36 Blower 37 Discharge port 39 Suction unit 40 Downward suction device (residual gas suction device)
41 Suction duct 42 Blower 44 Partition plate 45 Flow rate adjusting device 46 Sintered ore cooler (Embodiment 2)
48 Sintered ore cooler (Embodiment 3)
49 Discharge part elevating device 51 Suction part elevating device 53 Fixed part 55 Bolt hole 57 Plate member 59 Plate member 61 Bolt 62 Sintered ore cooler (Embodiment 4)
63 Hood 65 Seal mechanism 66 Sintered ore cooler (Embodiment 5)
71 Sintered ore cooler (conventional example)

Claims (9)

A sinter cooler that stacks sinter that has been sintered by a sinter on a trough trolley and continuously cools the sinter while moving the trough trolley.
A downward cooling device for performing downward air supply cooling by ventilating from the lower side to the upper side in the layer of the sinter, and a lower cooling device.
It is provided with an upper cooling device for performing upper air supply cooling by discharging cooling gas toward the upper surface of the sinter.
The upper cooling device is provided with a discharge port for the cooling gas, and has a hollow discharge portion arranged above the trough trolley so that the discharge port and the upper surface of the sinter face each other, and the discharge. A sinter cooling machine characterized by having a cooling gas supply device connected to a portion via a duct and supplying the cooling gas to the discharge portion at a positive pressure through the duct. The sinter cooling machine according to claim 1, wherein the upper cooling device is provided in the latter half of the entire region for cooling the sinter in the traveling direction of the trough carriage. In the cooler containing the cooling gas discharged toward the upper surface of the sinter and in contact with the sinter in the region provided with the upper cooling device in the entire region for cooling the sinter. The sinter cooling machine according to claim 1 or 2, further comprising a residual gas suction device configured to suck the residual gas of the above. The sinter cooling machine according to claim 3, wherein the residual gas suction device has a lower suction device configured to suck the residual gas from the lower side of the sinter. The sinter cooling machine according to claim 3 or 4, wherein the residual gas suction device has an upper suction device configured to suck the residual gas from the upper side of the sinter. A hood that covers the upper part of the trough carriage is further provided in the area provided with the upper cooling device in the entire area for cooling the sinter.
The sintered ore cooler according to any one of claims 1 to 4, wherein the discharge portion of the upper cooling device is arranged between the trough carriage and the hood. The upper suction device is connected to a suction portion arranged in the vicinity of the discharge portion of the upper cooling device via a suction duct, and the residual gas is sucked at a negative pressure through the suction duct. Equipped with a pressure generator
A hood that covers the upper part of the trough carriage is further provided in the area provided with the upper cooling device in the entire area for cooling the sinter.
The cooling of the sinter according to claim 5, wherein the discharge portion of the upper cooling device and the suction portion of the upper suction device are arranged between the trough carriage and the hood. Machine. The sinter cooling machine according to any one of claims 1 to 7, further comprising a discharge section elevating device for adjusting the vertical position of the discharge section of the upper cooling device. The sinter cooling machine according to claim 7, further comprising a suction unit elevating device for adjusting the vertical position of the suction unit of the upper suction device.

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