A sinter cooling device

Abstract

The present invention belongs to the field of sinter production, and discloses a sinter cooling device capable of quickly and uniformly reducing the temperature of sinter. It includes a housing; a feeding device located at the top of the housing for uniformly feeding sinter into the housing; a plurality of feeding channels arranged at intervals in the housing and communicating with the feeding device; an air distribution channel, including an air inlet channel and an air outlet channel adjacent to both sides of the feeding channel, the air inlet channel and the air outlet channel are not adjacent, and a discharging device located at the bottom of the housing. Among them, diversion devices communicating with the adjacent air inlet channel and air outlet channel are respectively formed on both sides of the feeding channel. The diversion device is configured to enable the cooling air entering from the air inlet channel to flow horizontally into the feeding channel to cool the sinter therein and then enter the air outlet channel for discharge. At the same time, the cooled sinter uniformly descends in the feeding channel under the action of the discharging device and is discharged from the housing.

Description

Technical Field

[0001] The present invention relates to the field of sinter production, and particularly to a sinter cooling device. Background Art

[0002] Sintering is a process of mixing various powdered iron-containing raw materials, adding appropriate amounts of fuel and flux, adding an appropriate amount of water, and after mixing and pelletizing, making a series of physical and chemical changes occur to the sinter on a sintering device through high-temperature combustion, and bonding the ore powder particles into blocks. Generally, the temperature of the sinter completed on a sintering machine can reach 600 - 700 °C, and it is necessary to reduce the temperature of the sinter to below 150 °C through a sinter cooling device, and then transport it to the next process for treatment and application.

[0003] In the prior art, the main types of sinter cooling devices include belt coolers, annular coolers, and vertical coolers, etc. Among them, the cooling process of the vertical cooler is another brand-new sinter cooling process following the annular cooler, belt cooler, and on-machine cooling process. In the vertical cooler, the hot sinter is placed in a closed vertical cylinder for cooling, fundamentally and effectively avoiding the drawback of a large air leakage rate of traditional sinter cooling devices (such as annular coolers, belt coolers, and on-machine cooling), thus effectively ensuring that the gas does not leak during the heat exchange process, with extremely small waste heat loss, and all the hot waste gas generated by cooling the sinter can be recovered, achieving the ultimate utilization of 100% of the high-temperature waste gas.

[0004] For the vertical cooler, how to quickly and uniformly reduce the temperature of the sinter inside it has been a problem faced by this field. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a sinter cooling device that can quickly and uniformly reduce the temperature of the sinter.

[0006] The sinter cooling device according to the present invention includes: a housing; a feeding device located at the top of the housing, the feeding device being used to evenly feed the sinter into the housing; a plurality of longitudinally arranged feeding channels spaced apart inside the housing, each feeding channel being communicated with the feeding device; a air distribution channel, the air distribution channel including an air inlet channel adjacent to one side of the feeding channel and an air outlet channel adjacent to the other side of the feeding channel, the air inlet channel and the air outlet channel not being adjacent to each other, and a discharging device located at the bottom of the housing, the discharging device being used to make the sinter in each feeding channel flow out of the housing as a whole at a uniform speed. Among them, diversion devices are respectively formed on both sides of the feeding channel and are communicated with the adjacent air inlet channel and air outlet channel, and the diversion devices are configured to enable the cooling air entering from the air inlet channel to flow horizontally into the feeding channel to cool and lower the temperature of the sinter therein and then enter the air outlet channel for discharge, and at the same time, the cooled sinter gradually and uniformly descends in the feeding channel under the action of the discharging device and is discharged from the housing.

[0007] Furthermore, a plurality of vertical partitions are arranged at intervals inside the housing. An inlet channel, an air inlet channel, and an exhaust air channel are formed between adjacent vertical partitions. Among them, the top between adjacent vertical partitions forming the inlet channel is communicated with the feeding device, the top between adjacent vertical partitions forming the air inlet channel and the exhaust air channel is closed, and a guiding device is formed on each vertical partition.

[0008] Furthermore, air inlet channels are respectively arranged on opposite sides of the housing and on the central axis of the housing, and air inlets communicated with the air inlet channels are formed on the side wall of the housing.

[0009] Furthermore, a feeding port is arranged at the top of the housing. The feeding device includes at least one cloth pipe communicated with the feeding port. The cloth pipe includes a main pipe communicated with the feeding port and an expanded diameter pipe communicated with the main pipe. The large diameter ends of the expanded diameter pipes are respectively connected to the outer side walls of the inlet channels farthest from the central axis of the housing.

[0010] Furthermore, a guiding member is formed at the top of the air inlet channel and the exhaust air channel between the two inlet channels farthest from the central axis of the housing for uniformly guiding the sintered ore in the expanded diameter pipe into each inlet channel.

[0011] Furthermore, the guiding member at the top of the air inlet channel on the central axis of the housing is configured in a sharp corner shape, and the guiding member at the top of the exhaust air channel is configured in an inclined plane.

[0012] Furthermore, the guiding device includes a plurality of guiding holes formed at intervals on the vertical partition and a shielding member arranged in the guiding holes for preventing the sintered ore in the inlet channel from entering the air inlet channel and the exhaust air channel.

[0013] Furthermore, the shielding member includes at least one baffle arranged in the guiding hole, and the baffle is arranged to incline towards the bottom of the inlet channel.

[0014] Furthermore, the shielding member includes two baffles arranged at intervals in the guiding hole, and a guiding channel communicated with the guiding hole is formed between the two baffles.

[0015] Furthermore, an exhaust air outlet communicated with the exhaust air channel is further formed at the upper part of the housing, and the exhaust air outlet is connected to an exhaust fan.

[0016] Compared with the prior art, the cross-flow type sintering cooling device of the present invention has a simpler structure and is more convenient to operate. The arrangement modes of its air distribution channel and inlet channel can not only make the distribution of the sintered ore inside it more uniform, but also make the cooling of the sintered ore more uniform, sufficient and rapid, so as to achieve the purpose of quickly and effectively reducing the temperature of the sintered ore. At the same time, the arrangement mode of the exhaust air channel in the air distribution channel can also achieve the purpose of efficiently recovering the heat of the sintered ore. Description of the Drawings

[0017] Figure 1 A schematic front view of the structure of a sintered ore cooling device according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 The cross-sectional schematic diagram of the sinter cooling device along the AA direction is shown;

[0019] Figure 3 for Figure 1 The cross-sectional schematic diagram of the sinter cooling device along the BB direction is shown;

[0020] Figure 4 for Figure 1 The cross-sectional schematic diagram of the sinter cooling device along the CC direction is shown. DETAILED DESCRIPTION

[0021] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0022] Figure 1 FIG. 1 shows the structure of a sintered ore cooling device 100 according to an embodiment of the present invention. Figure 1 As shown, the sintered ore cooling device 100 may include: a shell 1; a feeding device 2 located at the top of the shell 1, the feeding device 2 is used to allow the sintered ore to enter the shell 1 evenly; a plurality of longitudinal feeding channels 3 arranged at intervals in the shell 1, each feeding channel is connected to the feeding device 2; an air distribution channel, the air distribution channel includes an air inlet channel 4 adjacent to one side of the feed channel 3 and an exhaust channel 5 adjacent to the other side of the feed channel 3, the air inlet channel 4 is not adjacent to the exhaust channel 5, and a discharging device 7 located at the bottom of the shell 1, the discharging device 7 is used to allow the sintered ore in each feed channel 3 to flow out of the shell 1 evenly as a whole. Among them, the two sides of the feed channel 3 are respectively formed with a guide device 8 connected to the adjacent air inlet channel 4 and the exhaust channel 5. The guide device 8 is constructed to enable the cooling air entering from the air inlet channel 4 to flow horizontally into the feed channel 3 to cool the sintered ore therein and then be discharged from the exhaust channel 5. At the same time, the cooled sintered ore gradually and evenly descends in the feed channel 3 under the action of the discharging device 7 and is discharged from the shell 1.

[0023] When the sintered ore cooling device 100 of the embodiment of the present invention is working, the sintered ore enters the feed channel 3 through the feeding device 2 and flows slowly and uniformly from top to bottom in the feed channel 3, and fully exchanges heat with the cooling air flowing horizontally generated by the air inlet channel 4 and the guide device 8 to achieve cooling of the sintered ore. The sintered ore that completes the cooling process descends as a whole in the feed channel 3 and is discharged from the shell 1 under the action of the discharging device 7, and the heat in the sintered ore can be discharged from the shell 1 through the exhaust channel 5 for recycling.

[0024] In the sintered ore cooling device 100 according to the embodiment of the present invention, the sintered ore can enter a plurality of spaced-apart feed channels 3 through the feeding device 2 respectively, so that the sintered ore can be divided into multiple parts, facilitating targeted cooling of the multiple parts simultaneously, which helps improve the cooling efficiency of the sintered ore; since air inlet channels 4 and air exhaust channels 5 are arranged on both sides of each feed channel 3, and a diversion device 8 communicating with the adjacent air inlet channel 4 and air exhaust channel 5 simultaneously is provided on each feed channel 3, the cooling air in the air inlet channel 4 can laterally cool the sintered ore in the corresponding feed channel 3 through the diversion device 8. In this way, the sintered ore in each vertical area of the feed channel 3 can be quickly and efficiently cooled by the lateral cooling air, which helps achieve rapid and uniform cooling of the sintered ore; at the same time, the cooling air that absorbs the heat of the submerged arc furnace can be discharged and recycled after entering the air exhaust channel 5, preventing the heat from further spreading to other feed channels 3, thus avoiding affecting the cooling of the sintered ore in other feed channels 3 due to heat dissipation into other feed channels 3. Therefore, it helps improve the cooling efficiency of the sintered ore in each feed channel 3; in addition, since the air inlet channel 4 and the air exhaust channel 5 are arranged on both sides of each feed channel 3, the sintered ore in each feed channel 3 can be quickly and efficiently cooled by the lateral cooling air simultaneously, which further realizes the purpose of rapid and uniform cooling of the sintered ore. Additionally, by providing the discharging device 7 in the present invention, the cooled sintered ore can gradually and uniformly descend as a whole in the feed channel 3 to be discharged from the feed channel 3, so that the uniformity of the temperature of the sintered ore is better, and further effectively ensures the discharging temperature of the sintered ore to meet the subsequent process requirements.

[0025] In the case of Figure 1 and Figure 4In the preferred embodiment shown, a plurality of vertical partitions 10 are arranged at intervals inside the housing 1, and a feed channel 3, an air inlet channel 4, and an exhaust air channel 5 are formed between adjacent vertical partitions 10. Among them, the top between adjacent vertical partitions 10 forming the feed channel 3 is communicated with the feeding device 2, the top between adjacent vertical partitions 10 forming the air inlet channel 4 and the exhaust air channel 5 is closed, and a flow guiding device 8 is formed on each vertical partition 10. In this embodiment, the top between adjacent vertical partitions 10 forming the feed channel 3 is communicated with the feeding device 2, so that the sintered ore can enter each feed channel 3; the top between adjacent vertical partitions 10 forming the air inlet channel 4 and the exhaust air channel 5 is closed, which can prevent the sintered ore from entering the air inlet channel 4 and the exhaust air channel 5 from the top. The cooling air in the air inlet channel 4 can only enter the feed channel 3 laterally through the flow guiding device 8 and then enter the exhaust air channel 5 laterally. In this embodiment, by using a plurality of vertical partitions 10 to realize the zoning and arrangement of the feed channel 3, the air inlet channel 4, and the exhaust air channel 5, the cooling of the sintered ore in the feed channel 3 is more uniform and efficient, and its structure is simpler and the installation is more convenient.

[0026] Preferably, in the embodiment as Figure 1 shown, the air inlet channels 4 are respectively arranged on opposite sides of the housing 1 and on the central axis of the housing 1. Combining Figure 3 with what is shown, air inlets 12 communicating with the air inlet channels 4 are formed on the side walls of the housing 1. In this embodiment, the air inlet channels 4 are arranged on both sides and in the center of the housing 1, so that the cooling air in the air inlet channels 4 on both sides of the housing 1 can diffuse from both sides of the housing 1 towards the center, and the cooling air in the air inlet channel 4 in the center of the housing 1 can diffuse from the center of the housing 1 towards both sides. Such a distribution of the cooling air is more reasonable and can further improve the cooling efficiency.

[0027] Preferably, as Figure 3 shown, a plurality of air inlets 12 can be provided, preferably arranged at intervals along the height direction of the air inlet channel 4, and the air intake of each air inlet 11 can be independently measured and adjusted according to process requirements.

[0028] According to the present invention, in the preferred embodiment as Figures 1 to 3 shown, a feed inlet 6 is provided at the top of the housing 1, and the feeding device 2 includes at least one cloth pipe communicated with the feed inlet 6. The cloth pipe includes a main pipe 21 communicated with the feed inlet 6 and an expanded diameter pipe 22 communicated with the main pipe 21. The large diameter ends of the expanded diameter pipes 22 are respectively connected to the outer side walls of the feed channels 3 located farthest from the central axis of the housing 1. Through this setting, on the one hand, the expanded diameter pipe 22 makes the distribution of the sintered ore in the housing 1 more dispersed and uniform, and on the other hand, it can cover all the feed channels 3 to ensure that the sintered ore in the expanded diameter pipe 22 can be distributed into each feed channel 3.

[0029] In a preferred embodiment, as Figure 1 shown, a flow guiding member 20 for uniformly and rapidly guiding the sintered ore in the diameter-expanding pipe 22 into each feed channel 3 is formed at the top of the air inlet channel 4 and the exhaust air channel 5 between the two feed channels 3 that are farthest from the central axis of the housing 1. The arrangement of the flow guiding member 20 can improve the feeding efficiency of the sintered ore in the diameter-expanding pipe 22 entering each feed channel 3.

[0030] Preferably, the flow guiding member 20 at the top of the air inlet channel 4 located on the central axis of the housing 1 is configured in a sharp-corner shape, and the flow guiding member 20 at the top of the exhaust air channel 5 is configured as an inclined surface. Under the combined action of the sharp-corner shape and the inclined surface, the sintered ore in the diameter-expanding pipe 22 can be quickly and smoothly introduced into each feed channel 3. Further preferably, as Figure 1 shown, in order to make the materials entering each feed channel 3 more uniform, the inclined surfaces at the tops of the two exhaust air channels 5 can be symmetrically arranged. More preferably, the angles between the inclined surfaces at the tops of the two exhaust air channels 5 and the vertical direction, as well as the angles between the two inclined surfaces of the above-mentioned sharp-corner shape and the vertical direction, are both configured to be 30° to 60°, preferably 45°.

[0031] According to the present invention, as Figure 1 shown, the flow guiding device 8 may include a plurality of flow guiding holes 81 formed at intervals on the vertical partition 10 and a shielding member 82 disposed in the flow guiding holes 81 for preventing the sintered ore in the feed channel 3 from entering the air inlet channel 4 and the exhaust air channel 5. The arrangement of the shielding member 82 enables neither the air inlet channel 4 nor the exhaust air channel 5 to enter the sintered ore, which can not only avoid the material loss caused by the sintered ore entering the exhaust air channel during the cooling process, but also avoid the disturbance of the cooling air inside due to the sintered ore entering the air inlet channel 4, thereby affecting the lateral flow of the cooling air and further affecting the rapid and uniform cooling of the sintered ore in the feed channel 3.

[0032] Preferably, the shielding member 82 may include at least one baffle disposed in the flow guiding hole 81, and the baffle is disposed to be inclined towards the bottom of the feed channel 3. Preferably, the angle between the baffle and the vertical direction can be specifically set according to actual needs, and no specific limitation is made here. Further preferably, the baffles located on the same vertical partition 10 can be arranged in parallel and at equal intervals, so that the guiding direction of the cooling air is consistent, which helps to improve the uniformity of cooling.

[0033] Furthermore, in the preferred embodiment as Figure 1 shown, the shielding member 82 includes two baffles disposed at intervals in the flow guiding hole 81, and a flow guiding channel for communicating with the flow guiding hole is formed between the two baffles. The formation of the flow guiding channel can make the flow of the cooling air more stable, which helps to further improve the uniformity of cooling the sintered ore in the feed channel 3.

[0034] Preferably, the two baffles can be arranged in parallel to make the flow velocity of the cooling air flowing through the diversion channel more stable. More preferably, the diversion channel formed by the two baffles can be configured to have a gradually decreasing inner diameter in the flow direction of the cooling air. This setting can increase the flow velocity of the cooling air entering the feed channel 3, thereby helping to further improve the cooling efficiency.

[0035] According to the present invention, as Figure 1 shown, an air outlet 11 communicating with the exhaust air channel 5 is further formed in the upper part of the housing 1, and the air outlet 11 is connected to an exhaust fan. The exhaust fan can apply a negative pressure to the air outlet 11, so as to suck out the gas in each exhaust air channel 5 under negative pressure for recycling.

[0036] According to the present invention, as Figure 1 shown, the discharging device 7 may include a plurality of discharging hoppers 71 uniformly arranged at the bottom of the feed channel 3. A vibrating feeding device 72 may be provided on the discharging hopper 71. Thus, under the action of the vibrating feeding device 72, each discharging hopper 71 can discharge materials at a uniform speed simultaneously, so that the cooled sintered ore in the feed channel 3 descends uniformly along the axial direction of the housing 1 as a whole. The sintered ore discharged by the discharging device 7 can be collected by a transport vehicle 9 and uniformly transported to the required workstations.

[0037] It should be noted that the number of the feeding devices 2 of the sintered ore cooling device 100 in the embodiment of the present invention can be multiple to achieve more-point feeding of the sintered ore. The number of the feeding devices 2 can be set according to actual needs, and no specific limitation is made here. The number of the discharging devices 7 can be the same as the number of the feeding devices 2 and correspond to the feeding devices 2 one by one, or only one discharging device 7 can be provided to control the discharging of all the feed channels 3 as a whole.

[0038] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the specification of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A sinter cooling device, characterized in that, Comprising: A housing, A feeding device located at the top of the housing, which is used to evenly feed sintered ore into the housing, A plurality of longitudinally arranged feeding channels arranged at intervals within the housing, each of the feeding channels being in communication with the feeding device, An air distribution channel, which includes an air inlet channel adjacent to one side of the feeding channel and an air outlet channel adjacent to the other side of the feeding channel, the air inlet channel and the air outlet channel not being adjacent to each other, and, A discharging device located at the bottom of the housing, which is used to evenly discharge the sintered ore in each of the feeding channels out of the housing as a whole, Wherein, guiding devices communicating with the adjacent air inlet channel and air outlet channel are respectively formed on both sides of the feeding channel, and the guiding devices are configured to enable the cooling air entering from the air inlet channel to flow laterally into the feeding channel to cool the sintered ore therein and then be discharged from the air outlet channel. At the same time, the cooled sintered ore gradually descends in the feeding channel under the action of the discharging device and is discharged out of the housing; A plurality of vertical partitions are arranged at intervals within the housing, and the feeding channels, the air inlet channels, and the air outlet channels are formed between adjacent vertical partitions. Among them, the top between adjacent vertical partitions forming the feeding channel is in communication with the feeding device, the top between adjacent vertical partitions forming the air inlet channel and the air outlet channel is closed, and the guiding devices are formed on each vertical partition; the air inlet channels are arranged on opposite sides and on the central axis of the housing, and air inlets communicating with the air inlet channels are formed on the side wall of the housing; a feeding port is provided at the top of the housing, and the feeding device includes at least one cloth pipe communicating with the feeding port. The cloth pipe includes a main pipe communicating with the feeding port and an enlarged-diameter pipe communicating with the main pipe. The large-diameter ends of the enlarged-diameter pipes are respectively connected to the outer side walls of the feeding channels located farthest from the central axis of the housing; guiding members for evenly guiding the sintered ore in the enlarged-diameter pipes into each of the feeding channels are formed at the tops of the air inlet channels and the air outlet channels between the two feeding channels located farthest from the central axis of the housing; the guiding member at the top of the air inlet channel located on the central axis of the housing is configured in a sharp-corner shape, and the guiding member at the top of the air outlet channel is configured in an inclined plane; the guiding device includes a plurality of guiding holes formed at intervals on the vertical partition and shielding members arranged in the guiding holes for preventing the sintered ore in the feeding channel from entering the air inlet channel and the air outlet channel.

2. The sinter cooler device according to claim 1, characterized in that, The shielding member includes at least one baffle arranged in the guiding hole, and the baffle is arranged to incline towards the bottom of the feeding channel.

3. The sinter cooler device according to claim 2, wherein, The shielding member includes two baffle plates arranged at intervals in the guiding hole, and a guiding channel for communicating with the guiding hole is formed between the two baffle plates.

4. The sinter cooler according to claim 1, characterized in that, An air outlet communicating with the air outlet channel is further formed in the upper part of the housing, and the air outlet is connected to an exhaust fan.

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