Large blast furnace flat outlet distribution chute

Abstract

The present invention provides a large blast furnace flat outlet distribution chute, which includes a trough body and a rectifying part, wherein the trough body has a material receiving cavity, and the material receiving cavity has a feeding end and a distribution end; the rectifying part is connected to the trough body and is located on a side of the trough body close to the distribution end, and a discharging cavity is provided in the rectifying part and runs through the rectifying part, and the feeding port of the discharging cavity is connected to the material receiving cavity, and the discharging port of the discharging cavity is a flat discharging port. Compared with the prior art, the large blast furnace flat outlet distribution chute provided by the present invention can make the thickness of the material layer leaving the discharging port of the distribution chute as thin as possible without blocking the material, and effectively avoid the divergence and turbulence of the material flow at the outlet, so that the width of the material surface ring (material platform) where the rotating distribution parabola falls to the material surface in the blast furnace is as narrow as possible, thereby achieving precise distribution.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace distribution technology, in particular to a flat outlet distribution chute for a large blast furnace. Background Art

[0002] The blast furnace is the main equipment for steel smelting, and the blast furnace charging chute is the main charging equipment on the blast furnace. The blast furnace charging chute is installed on the top of the blast furnace, placed at the bottom of the charging device and connected to the charging device. Driven by the charging device, it rotates at different inclination angles, and the raw materials falling into the blast furnace charging chute are centrifugally thrown out at different angles. The larger the blast furnace, the lower the utilization coefficient of the blast furnace is generally. One of the reasons is that the larger the blast furnace, the larger the diameter of the furnace, and the larger the outer diameter of the charging. The wider the outer periphery, the wider the width of the material platform (the concentric ring width of the material at the same angle) that is scattered from the blast furnace charging chute.

[0003] The blast furnace distribution chute in the prior art has a wider outer material platform, so it is difficult to accurately deliver coke, sintered ore, pelletized ore, etc. to the required outer area.

[0004] like Figures 1 to 4 As shown, the outlet of the blast furnace charging chute in the prior art has a cross-section of arc (U), square, trapezoidal, inverted trapezoidal, etc. When rotating the charging, these structures will more or less cause the outlet material flow to diverge and become turbulent. Under the action of the rotating eccentric force, the material accumulates and climbs along the side, and the thickness of the outlet material layer reaches more than 400mm. After the thick material layer and the divergent material flow are centrifugally thrown out, the width of the material platform on the large diameter charging surface will be wider. Summary of the invention

[0005] Aiming at the technical problem that the existing blast furnace charging chute easily causes the outlet material flow to diverge and become disordered during charging, and cannot effectively achieve accurate charging, the present invention provides a large blast furnace flat outlet charging chute which can effectively avoid the material flow from diverging and becoming disordered at the outlet, control the thickness of the outlet material layer, and thus achieve accurate charging.

[0006] A large blast furnace flat outlet distribution chute, comprising:

[0007] The tank body has a material receiving cavity, and the material receiving cavity has a feeding end and a material distributing end;

[0008] The rectifying part is connected to the trough body and is located on one side of the trough body close to the cloth end. A discharge cavity is provided in the rectifying part and passes through the rectifying part. The feed port of the discharge cavity is connected to the receiving cavity, and the discharge port of the discharge cavity is a flat discharge port.

[0009] Preferably, it also includes:

[0010] The downstream part is connected to the side of the rectifying part away from the trough body, and a downstream cavity is provided in the downstream part. The downstream cavity penetrates the downstream part from the side close to the rectifying part to the side away from the rectifying part, and the discharge port of the downstream cavity is a flat discharge port.

[0011] Preferably, the rectifying unit comprises:

[0012] A bottom wall connected to the tank body;

[0013] A top wall, spaced apart from the bottom wall;

[0014] A side wall connected to the trough body, with two ends respectively connected to the bottom wall and the top wall, two side walls are provided, and the two side walls are spaced apart from each other;

[0015] The bottom wall, the top wall and the two side walls together form the discharge cavity.

[0016] Preferably, an anti-blocking groove is provided on the top wall and penetrates the top wall, the anti-blocking groove connects the flat discharge port and the cloth end, and the surface of the top wall surrounding the anti-blocking groove is inclined toward the center from the direction close to the bottom wall to the direction away from the bottom wall.

[0017] Preferably, the top wall is arranged at an inclination, and the thickness of the discharge cavity gradually decreases from the direction of the feed inlet toward the direction of the flat discharge outlet.

[0018] Preferably, the tank body comprises:

[0019] Groove bottom wall;

[0020] A groove side wall connected to the groove bottom wall, and two groove side walls are provided, the two groove side walls are arranged oppositely and spaced apart, and the two side walls are arranged corresponding to the two groove side walls;

[0021] The groove bottom wall and the two groove side walls together form the material receiving cavity, and the bottom wall is arranged flush with the groove bottom wall.

[0022] Preferably, the side wall is arranged flush with the groove side wall, or the side wall is inclined away from the center from the direction close to the groove side wall to the direction away from the groove side wall.

[0023] Preferably, it also includes:

[0024] A connecting piece is connected to the tank body and is located on a side close to the feed end.

[0025] Preferably, the flat discharge port is a rectangular hole or an oblong hole.

[0026] Preferably, it also includes:

[0027] The downstream part is connected to the side of the rectifying part away from the trough body, and a downstream cavity is provided in the downstream part. The downstream cavity penetrates the downstream part from the side close to the rectifying part to the side away from the rectifying part, and the cross-section of the downstream cavity is the same as that of the flat discharge port.

[0028] Preferably, it also includes:

[0029] A receiving plate is connected to the trough body or the rectifying part, and along the thickness direction of the trough body, the receiving plate is at least partially located outside the receiving cavity. The receiving plate is used to receive the material dropped from the central throat and guide the material into the receiving cavity or the discharging cavity.

[0030] Compared with the prior art, the large blast furnace flat outlet distribution chute provided by the present invention comprises a trough body and a rectifying part, wherein the trough body has a receiving cavity, and the receiving cavity has a feeding end and a distribution end; the rectifying part is connected to the trough body and is located on one side of the distribution end, and a discharging cavity is provided in the rectifying part and is arranged through the rectifier, and the feeding port of the discharging cavity is connected with the receiving cavity, and the discharging port of the discharging cavity is a flat discharging port. Therefore, in the blast furnace distribution process, the material in the trough body can first flow through the rectifying part, and then flow out through the flat discharging port to the blast furnace material surface, and the rectified material flow flows out from the flat discharging port, so that the material layer thickness leaving the discharging port of the distribution chute can be as thin as possible without blocking the material, and effectively avoid the divergence and turbulence of the material flow, effectively reduce the area of ​​the scattered material flow, and make the width of the material surface ring (material platform) where the rotating distribution parabola falls to the material surface in the blast furnace as narrow as possible, so as to achieve precise distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a structural schematic diagram of a blast furnace distribution chute in the prior art;

[0033] Figure 2 It is a structural schematic diagram of a blast furnace distribution chute in the prior art;

[0034] Figure 3 It is a structural schematic diagram of a blast furnace distribution chute in the prior art;

[0035] Figure 4 It is a structural schematic diagram of a blast furnace distribution chute in the prior art;

[0036] Figure 5 A schematic diagram of the structure of a large blast furnace flat outlet distribution chute provided in Example 1;

[0037] Figure 6 for Figure 5 The structural schematic diagram of a preferred embodiment of a large blast furnace flat outlet distribution chute shown;

[0038] Figure 7 A schematic diagram of the structure of a large blast furnace flat outlet distribution chute provided in Example 2;

[0039] Figure 8 A schematic diagram of the structure of a large blast furnace flat outlet distribution chute provided in Example 3;

[0040] Fig. 9 A schematic diagram of the structure of a large blast furnace flat outlet distribution chute provided in Example 4;

[0041] Fig.10 A schematic diagram of the structure of a large blast furnace flat outlet distribution chute provided in Example 5;

[0042] Fig.11 It is a structural schematic diagram of three different inclination angles of a blast furnace burden distribution chute in a blast furnace burden distribution system in the prior art;

[0043] Fig.12 This is a schematic structural diagram of three different inclination angles of the large blast furnace flat outlet distribution chute in the blast furnace distribution system provided in Example 6. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0046] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0047] The present invention provides a large blast furnace flat outlet distribution chute, which includes a trough body and a rectifying part, wherein the trough body has a material receiving cavity, and the material receiving cavity has a feeding end and a distribution end; the rectifying part is connected to the trough body and is located on one side of the distribution end, and a discharge cavity is provided in the rectifying part and is arranged through the rectifying part, and the feeding port of the discharge cavity is connected to the material receiving cavity, and the discharge port of the discharge cavity is a flat discharge port. The large blast furnace flat outlet distribution chute can effectively prevent the material flow from diverging and becoming turbulent at the outlet, thereby realizing accurate distribution.

[0048] Embodiment 1

[0049] Please refer to Figure 5 and Figure 6 This embodiment provides a large blast furnace flat outlet distribution chute 100, which is applied to the blast furnace to achieve accurate distribution of the large blast furnace. The large blast furnace flat outlet distribution chute 100 is mainly used to control the height difference (thickness) of the outlet material layer and the flow direction of the material layer, and reduce the turbulence of the material flow, wherein the large blast furnace refers to 1500m 3 And above blast furnace.

[0050] The large blast furnace flat outlet distribution chute 100 comprises a trough body 10 and a rectifying part 20, wherein the trough body 10 has a material receiving chamber 11, so that when the large blast furnace flat outlet distribution chute 100 is installed on the central throat, the material falling from the central throat can be well received through the material receiving chamber 11. Preferably, in this embodiment, the material receiving chamber 11 is an open material receiving chamber, that is, the material receiving chamber 11 is a semi-enclosed structure with an opening at the upper end, so that the material falling from the central throat can be better received. The material receiving chamber has a feed end 111 and a distribution end 112, wherein it should be noted that the feed end 111 and the distribution end 112 refer to relative position areas in the material receiving chamber 11, and the feed end 111 can be located at any desired position according to actual needs. For example, the feed end 111 can be located at the end or upper side of the trough body 10, etc., as long as it can receive the material well, and the distribution end 112 is located at the end where the material needs to travel, so that after the material flows into the material receiving chamber 11 from the feed end 111, it can flow out from the distribution end 112.

[0051] The rectifying part 20 is connected to the trough body 10, and the rectifying part 20 is located on one side of the trough body 10 close to the material distribution end 112. A discharge cavity 21 is provided in the rectifying part 20 and is arranged to penetrate the rectifying part 20. The feed port of the discharge cavity 21 is communicated with the material receiving cavity 11, so that the material flowing out of the material distribution end 112 can flow into the discharge cavity 21 accordingly. The discharge port 211 of the discharge cavity 21 is a flat discharge port, wherein the flat discharge port means that the four sides of the discharge port 211 are all closed, and it is a closed structure, so that when the material flows out of the discharge port 211, it will not scatter around; at the same time, the length dimension of the discharge port 211 is greater than the thickness dimension of the discharge port 211, so that the material can be effectively prevented from diverging from the upper side.

[0052] It is understandable that the outlet cross-section of the blast furnace distribution chute in the prior art is arc (U) shaped, square, trapezoidal, and inverted trapezoidal. During use, in order to meet the needs of distribution production, the blast furnace distribution chute needs to have two functions: up and down tilting and rotational movement. When distributing materials to the blast furnace during the rotation process, the material flow enters the blast furnace through the inner cavity of the blast furnace distribution chute and appears scattered. The centrifugal force generated by the rotation of the blast furnace distribution chute will make the scattering of the material flow more serious, and the material flow is distributed to the blast furnace material surface. The material belt formed is wider, which is not conducive to precise process operation.

[0053] To achieve accurate material distribution in a large blast furnace, it is mainly necessary to control the height difference (thickness) of the outlet material layer and the flow direction of the material layer, as well as to reduce the turbulence of the material flow. In this embodiment, by setting the discharge port 211 of the rectifying part 20 as a flat structure, it is possible to forcibly control the height difference (thickness) of the outlet material layer and forcibly rectify the outlet material flow, and the material flow cross section is rectangular and flat. The material flow is first concentrated to the left or right side of the flat outlet (depending on the rotation direction of the large blast furnace flat outlet material distribution chute 100), and then distributed to the blast furnace material surface from the discharge port 211, reducing the area of ​​scattered material flow, reducing the width of the material belt, effectively avoiding the divergence and turbulence of the material flow, and achieving accurate material distribution. By providing the rectifying portion 20 and configuring the discharge port 211 as a flat structure, the material can be well blocked and guided, and the material can be better prevented from emanating from the left and right sides and the upper side of the discharge port, thereby effectively controlling the material flow into the blast furnace, narrowing the width of the material belt in the blast furnace, and better realizing precise material distribution.

[0054] Preferably, the large blast furnace flat outlet distribution chute 100 also includes a downstream portion 310, the downstream portion 310 is connected to the side of the rectifying portion 20 away from the trough body 10, and a downstream cavity 311 is provided in the downstream portion 310, the downstream cavity 311 is arranged from the side close to the rectifying portion 20 to the side away from the rectifying portion 20 through the downstream portion 310, and the discharge port of the downstream cavity 311 is a flat discharge port. Specifically, in this embodiment, the cross-section of the downstream cavity 311 is the same as the shape of the flat discharge port 211 of the rectifying portion 20. By arranging the downstream portion 310 at the rear side of the rectifying portion 20, the length of the flat closed outlet section can be lengthened, and the downstream section 310 is arranged so that the material flow changes from a turbulent state to a downstream state.

[0055] It is understandable that, since only the rectifying part 20 is provided, when there are foreign objects mixed in the material (such as steel bars of about 200 mm and grate bars on the sintering machine mixed in the material), the foreign objects are easily stuck in the flat outlet section of the rectifying part 20, resulting in material obstruction. In this embodiment, the downstream part 310 is provided at the rear side of the rectifying part 20, which can effectively reduce the situation of foreign object blockage and ensure the normal transportation of the material.

[0056] Preferably, the rectifying part 20 includes a bottom wall 22, a top wall 23 and a side wall 24, wherein the bottom wall 22 is connected to the tank body 10, the top wall 23 is spaced apart from the bottom wall 22, the side wall 24 is connected to the tank body 10, and the two ends of the side wall 24 are respectively connected to the bottom wall 22 and the top wall 23. Two side walls 24 are provided, and the two side walls 24 are spaced apart from each other. The bottom wall 23, the top wall 23 and the two side walls 24 together enclose the discharge cavity 21. Thus, the reliability of the connection between the rectifying part 20 and the tank body 10 can be better guaranteed, and the discharge cavity 21 can also better receive the material in the receiving cavity 11.

[0057] Preferably, the top wall 23 is tilted, and the thickness of the discharge cavity 21 gradually decreases from the feed inlet to the flat discharge port 211. That is, in the discharge cavity 21, the thickness space on the side close to the feed inlet is greater than the thickness space on the side close to the discharge port 211, so that the discharge cavity 21 can better receive the material in the receiving cavity 11, making the material movement transition smoother.

[0058] Preferably, the trough body 10 includes a trough bottom wall 12 and a trough side wall 13, wherein the trough side wall 13 is connected to the trough bottom wall 12, and two trough side walls 13 are provided, and the two trough side walls 13 are arranged relatively spaced apart, and the two side walls 24 are arranged corresponding to the two trough side walls 13. That is, one side wall 24 is connected to one trough side wall 13, and the other side wall 24 is connected to the other trough side wall 13. The trough bottom wall 12 and the two trough side walls 13 together enclose the material receiving cavity 11, and the bottom wall 22 is arranged flush with the trough bottom wall 12. The flush arrangement of the bottom wall 22 with the trough bottom wall 12 means that the inner surface of the bottom wall 22 is flush with the inner surface of the trough bottom wall 12, and the outer surface of the bottom wall 22 is flush with the outer surface of the trough bottom wall 12. This allows the material to pass more smoothly through the connection between the bottom wall 22 and the groove bottom wall 12, avoiding material blockage, while also ensuring the structural strength of the bottom wall 22.

[0059] Preferably, the side wall 24 is flush with the groove side wall 13. That is, the inner surface of the side wall 24 is flush with the inner surface of the groove side wall 13, and the outer surface of the side wall 24 is flush with the outer surface of the groove side wall 13. Thus, when the material passes through the connection between the side wall 24 and the groove side wall 13, it is smoother to avoid material blockage, and the structural strength of the side wall 24 can also be guaranteed.

[0060] Preferably, the large blast furnace flat outlet distribution chute 100 further includes a connector 30, which is connected to the trough body 10 and is located near the feeding end 111, so that the large blast furnace flat outlet distribution chute 100 can be conveniently connected to the central throat pipe through the connector 30. The connector 30 can be a connecting ear structure or a hook structure, so that it can be connected to the central throat pipe or the distributor.

[0061] Preferably, the flat discharge port 211 is an oblong hole, that is, the flat discharge port 211 is an oblong structure, and the flat discharge port 211 has rounded corners with arc transitions on all sides.

[0062] The width of the feeding opening of the large blast furnace flat outlet feeding chute 100 provided in this embodiment is greatly narrowed and more uniform, thereby achieving precise feeding, improving the feeding condition in the blast furnace and the charge ratio condition, increasing production and reducing energy consumption.

[0063] It can be understood that the large blast furnace flat outlet distribution chute 100 provided in this embodiment is provided with the additional rectifying part 20 at the rear side of the trough body 10, instead of directly providing baffles on both sides of the trough body 10. Firstly, the rectifying part 20 can have a certain accommodation and buffering effect, and secondly, it can also prevent the material from falling directly onto the baffle and rebounding and diverging, so that the material cannot fall well into the large blast furnace flat outlet distribution chute. At the same time, the height (thickness) difference of the material flow can also be well controlled by the flat discharge port 211.

[0064] It is understandable that the larger the blast furnace, the lower the utilization coefficient of the blast furnace is generally. One of the reasons is that the larger the blast furnace, the larger the diameter of the furnace, and the larger the diameter of the distribution. The wider the material platform width (the concentric ring width of the material at the same angle) radiates from the flat outlet distribution chute of the large blast furnace, the wider the material platform width. In the existing large blast furnace flat outlet distribution chute, the wider the material platform width, the more difficult it is to accurately deliver coke, sintered ore, pelletized ore, etc. to the required interval. To achieve accurate distribution of large blast furnaces, it is mainly necessary to control the height difference (thickness) of the outlet material side and the flow direction of the material layer, as well as to reduce material flow turbulence.

[0065] Preferably, the large blast furnace flat outlet distribution chute 100 is mainly used for 1500m 3 For blast furnaces of 2000 mm and above, the overall length of the large blast furnace flat outlet distribution chute 100 is above 2500 mm, and the thickness of the flat discharge port 211 is controlled between 200 and 400 mm. More preferably, the thickness of the flat discharge port 211 is between 300 and 350 mm, so that the large blast furnace can be more accurately distributed.

[0066] Preferably, in one embodiment, the large blast furnace flat outlet distribution chute 100 can be divided into a first straight segment, a second straight segment and a tilted mouth segment along its length direction, and the second straight segment is arranged at the discharge side of the first straight segment, and the setting direction of the second straight segment is inclined upward relative to the first straight segment. The tilted mouth segment is arranged at the discharge side of the second straight segment, and the setting direction of the tilted mouth segment is inclined upward relative to the second straight segment. Thus, the large blast furnace flat outlet distribution chute 100 can be distributed farther when distributing materials, so that the diameter of the blast furnace body can be designed to be larger, and there is a small amount of material accumulation at the landing point, which plays a buffering role.

[0067] Embodiment 2

[0068] Please refer to Figure 7 This embodiment provides a large blast furnace flat outlet distribution chute 200, which is basically the same in structure as the large blast furnace flat outlet distribution chute 100 in the first embodiment, except that:

[0069] In this embodiment, the flat discharge port 210 is a rectangular hole.

[0070] Embodiment 3

[0071] Please refer to Figure 8 This embodiment provides a large blast furnace flat outlet distribution chute 400, which is basically the same in structure as the large blast furnace flat outlet distribution chute 100 in the first embodiment, except that:

[0072] In this embodiment, the rectifying part 410 is different from the embodiment 1. Specifically, from the direction close to the groove side wall 420 to the direction away from the groove side wall 420, the side wall 430 of the rectifying part 410 is inclined away from the center, so that the rectifying part 410 can be widened, so that the receiving cavity in the rectifying part 410 can better rectify the part 410, and can also better increase the volume of the receiving cavity to avoid material accumulation, and also can increase the width of the cloth. Of course, according to actual needs, in other embodiments, the side walls 430 on both sides of the rectifying part 410 can be set to an inclined state.

[0073] Embodiment 4

[0074] Please refer to Fig. 9 This embodiment provides a large blast furnace flat outlet distribution chute 500, which is basically the same in structure as the large blast furnace flat outlet distribution chute 100 in the first embodiment, except that:

[0075] In this embodiment, the rectifying part 510 is different from that in the second embodiment. Specifically, an anti-blocking groove 530 is provided on the top wall 520 of the rectifying part 510 and is arranged to penetrate the top wall 520, and the anti-blocking groove 530 connects the flat discharge port 540 and the distribution end 550. Thus, the anti-blocking groove 530 can prevent the material from being blocked at the rectifying part 510, so that the flow of the material is smoother. From the direction close to the bottom wall 560 to the direction away from the bottom wall 560, the surface 570 on the top wall 520 that surrounds the anti-blocking groove 530 is inclined toward the center. Thus, when the large blast furnace flat outlet distribution chute 500 distributes along the positive inclination angle, the surface 570 can guide the material in the anti-blocking groove 530 to a certain extent, and guide the material to the discharge cavity to ensure accurate distribution.

[0076] Embodiment 5

[0077] Please refer to Fig.10 This embodiment provides a large blast furnace flat outlet distribution chute 600, which is basically the same in structure as the large blast furnace flat outlet distribution chute 500 in the fourth embodiment, except that:

[0078] In this embodiment, the large blast furnace flat outlet distribution chute 600 further includes a receiving plate 610, which is connected to the trough body 620 or the rectifying part 630 and extends in the thickness direction of the trough body 620 ( Fig.10 The receiving plate 610 is at least partially located outside the receiving cavity 640, that is, the receiving plate 610 at least partially extends out of the trough body 620. The receiving plate 610 is used to receive the material dropped from the central throat, and to introduce the material into the receiving cavity 640 or the discharging cavity 650. Thus, when the large blast furnace flat outlet distribution chute 600 is set at an angle perpendicular to the central throat, the falling material can be smoothly received by the receiving plate 610, thereby introducing the material into the receiving cavity 640 or the discharging cavity 650, and better achieving precise distribution. Specifically, the receiving plate 610 is inclined relative to the side wall of the trough body 620, and the part of the receiving plate 610 located outside the trough body 620 is in an open shape, so that the material can be better received and the splashing of the material can be further prevented.

[0079] Embodiment 6

[0080] Please refer to Fig.11 and Fig.12 This embodiment provides a blast furnace charging system 1000, which includes a central throat 700 and a large blast furnace flat outlet charging chute installed on the central throat, wherein the large blast furnace flat outlet charging chute in this embodiment adopts the large blast furnace flat outlet charging chute 600 in Embodiment 5.

[0081] It is understandable that the flat outlet distribution chute of the large blast furnace in the prior art is not equipped with a receiving plate. When the flat outlet distribution chute of the large blast furnace is tilted up and down, the material coming down from the center throat is slightly divergent. When the flat outlet distribution chute of the large blast furnace tilts closer to vertical, part of the material will not pass through the flat outlet distribution chute of the large blast furnace but fall directly into the blast furnace, which is not conducive to precise process operation.

[0082] The blast furnace charging system 1000 in this embodiment adopts the large blast furnace flat outlet charging chute 600, so that the material coming down from the central throat pipe 700 can be better received through the receiving plate 610, thereby achieving more accurate charging.

[0083] Compared with the prior art, the large blast furnace flat outlet distribution chute provided by the present invention comprises a trough body and a rectifying part, wherein the trough body has a receiving cavity, and the receiving cavity has a feeding end and a distribution end; the rectifying part is connected to the trough body and is located on one side of the distribution end, and a discharging cavity is provided in the rectifying part and is arranged through the rectifier, and the feeding port of the discharging cavity is connected with the receiving cavity, and the discharging port of the discharging cavity is a flat discharging port. Therefore, in the blast furnace distribution process, the material in the trough body can first flow through the rectifying part, and then flow out through the flat discharging port to the blast furnace material surface, and the rectified material flow flows out from the flat discharging port, so that the material layer thickness leaving the discharging port of the distribution chute can be as thin as possible without blocking the material, and effectively avoid the divergence and turbulence of the material flow, effectively reduce the area of ​​the scattered material flow, and make the width of the material surface ring (material platform) where the rotating distribution parabola falls to the material surface in the blast furnace as narrow as possible, so as to achieve precise distribution.

[0084] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A large blast furnace flat outlet distribution chute, characterized in that: include: The tank body has a material receiving cavity, and the material receiving cavity has a feeding end and a material distributing end; A rectifying part is connected to the trough body and is located on one side of the trough body close to the material distributing end. A discharge cavity is provided in the rectifying part and runs through the rectifying part. The feed inlet of the discharge cavity is connected to the receiving cavity, and the discharge outlet of the discharge cavity is a flat discharge outlet. A downstream portion is connected to the side of the rectifying portion away from the tank body, and a downstream cavity is provided in the downstream portion. The downstream cavity penetrates the downstream portion from the side close to the rectifying portion to the side away from the rectifying portion, and the discharge port of the downstream cavity is a flat discharge port; The rectifying unit comprises: A bottom wall connected to the tank body; A top wall, spaced apart from the bottom wall; A side wall connected to the trough body, with two ends respectively connected to the bottom wall and the top wall, two side walls are provided, and the two side walls are spaced apart from each other; The bottom wall, the top wall and the two side walls together form the discharge cavity; The top wall is provided with an anti-blocking groove which penetrates through the top wall, and the anti-blocking groove is connected with the flat material outlet and the material distributing end.

2. The large blast furnace flat outlet distribution chute according to claim 1, characterized in that: From a direction close to the bottom wall to a direction away from the bottom wall, the surface of the top wall surrounding the anti-blocking groove is inclined toward a center direction.

3. The large blast furnace flat outlet distribution chute according to claim 1, characterized in that: The top wall is arranged obliquely, and the thickness of the discharge cavity gradually decreases from the direction of the feed inlet toward the direction of the flat discharge outlet.

4. The large blast furnace flat outlet distribution chute according to claim 3, characterized in that: The tank body comprises: Groove bottom wall; A groove side wall connected to the groove bottom wall, and two groove side walls are provided, the two groove side walls are arranged oppositely and spaced apart, and the two side walls are arranged corresponding to the two groove side walls; The groove bottom wall and the two groove side walls together form the material receiving cavity, and the bottom wall is arranged flush with the groove bottom wall.

5. The large blast furnace flat outlet distribution chute according to claim 4, characterized in that: The side wall is arranged flush with the groove side wall, or the side wall is arranged inclined away from the center from the direction close to the groove side wall to the direction away from the groove side wall.

6. The large blast furnace flat outlet distribution chute according to claim 1, characterized in that: Also includes: A connecting piece is connected to the tank body and is located on a side close to the feed end.

7. The large blast furnace flat outlet distribution chute according to any one of claims 1 to 6, characterized in that: The flat discharge port is a rectangular hole or an oblong hole.

8. The large blast furnace flat outlet distribution chute according to claim 7, characterized in that: Also includes: A receiving plate is connected to the trough body or the rectifying part, and along the thickness direction of the trough body, the receiving plate is at least partially located outside the receiving cavity. The receiving plate is used to receive the material dropped from the central throat and guide the material into the receiving cavity or the discharging cavity.

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