WO2023077934A1 - Large blast-furnace material distribution chute having flat outlet - Google Patents

Abstract

A large blast-furnace material distribution chute (100) having a flat outlet, the material distribution chute comprising a chute body (10) and a rectification portion (20), wherein the chute body (10) has a material receiving cavity (11), and the material receiving cavity (11) has a feeding end (111) and a material distribution end (112); and the rectification portion (20) is connected to the chute body (10) and is located on the side of the chute body (10) close to the material distribution end (112), a discharge cavity (21) penetrating the rectification portion (20) is provided in the rectification portion (20), a feeding port of the discharge cavity (21) is in communication with the material receiving cavity (11), and the discharge port (211) of the discharge cavity (21) is a flat discharge port (211). By means of the large blast-furnace material distribution chute (100) having the flat outlet, the thickness of a material layer leaving the discharge port (211) of the material distribution chute (100) can be made as thin as possible without material blocking, and the divergence and disorder of a material flow at the outlet are effectively avoided, such that the width of a material surface circular ring of parabolic falling of rotary material distribution to a material surface in a blast furnace is as narrow as possible, thus realizing precise material distribution.

Description

Large blast furnace flat outlet distribution chute

This application claims the priority of a Chinese patent application with application number 202122720239.4 and an invention titled "Large Blast Furnace Flat Outlet Distribution Chute" submitted to the China Patent Office on November 8, 2021, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of blast furnace material distribution, in particular to a large blast furnace flat outlet distribution chute.

Background technique

The blast furnace is the main equipment for iron and steel smelting, and the blast furnace distribution chute is the main distribution equipment on the blast furnace. The blast furnace distribution chute is installed on the top of the blast furnace, placed at the bottom of the distributor and connected to the distributor, driven by the distributor to rotate at different inclinations, and the raw materials falling into the blast furnace distribution chute are centrifugally thrown out at different angles. The larger the blast furnace, the lower the utilization factor of the blast furnace. One of the reasons is that the larger the blast furnace, the larger the inner diameter of the furnace, and the larger the outer diameter of the cloth. The width of the material platform (the width of the concentric ring of the material under the same angle) is wider.

In the blast furnace distribution chute in the prior art, because the width of the outer material table is wider, it is difficult for coke, sinter, pellets, etc. to be accurately delivered to the required outer area.

As shown in Figures 1 to 4, the outlet of the blast furnace distribution chute in the prior art has arc (U)-shaped, square, trapezoidal, inverted trapezoidal, etc. cross-sections. When the cloth is rotated, these structures more or less lead to the divergence and disorder of the outlet material flow, and the materials are piled up and climbed along the side under the action of the rotation eccentric force, and the thickness of the outlet material layer is 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 material surface will be wider.

Contents of the invention

Aiming at the technical problem that the blast furnace material distribution chute of the prior art is easy to cause divergence and disorder of the outlet material flow, and cannot effectively realize precise material distribution. The present application provides a large blast furnace flat outlet distribution chute that can effectively avoid divergence and disorder of the material flow at the outlet, control the thickness of the outlet material layer, and realize precise distribution.

A large blast furnace flat outlet distribution chute, which includes:

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

The rectification part is connected with the tank body and is located on the side of the tank body close to the cloth end. The rectification part is provided with a discharge cavity that runs through the rectification part. The discharge cavity The material inlet is in communication with the material receiving chamber, and the material outlet of the material outlet chamber is a flat type outlet.

Preferably, it also includes:

The downstream part is connected to the side of the rectifying part away from the tank body, and a downstream chamber is opened in the downstream part, and the downstream chamber is from the side close to the rectifying part to the side away from the rectifying part. One side of the part is set through the downstream part, and the discharge port of the downstream chamber is a flat discharge port.

Preferably, the rectification unit includes:

a bottom wall connected to the tank;

a top wall spaced apart from the bottom wall;

The side wall is connected to the tank body, and the two ends are respectively connected to the bottom wall and the top wall. There are two side walls, and the two side walls are relatively spaced apart;

The bottom wall, the top wall and the two side walls jointly enclose the discharge chamber.

Preferably, the top wall is provided with an anti-blocking groove that runs through the top wall, and the anti-blocking groove communicates with the flat discharge port and the cloth end, and moves away from the direction close to the bottom wall. In the direction of the bottom wall, the surface surrounding the anti-blocking groove on the top wall is inclined toward the center.

Preferably, the top wall is arranged obliquely, and the thickness of the discharge cavity gradually decreases from the direction of the feed inlet to the direction of the flat discharge outlet.

Preferably, the tank body includes:

tank bottom wall;

The side walls of the groove are connected to the bottom wall of the groove, and there are two side walls of the groove, the two side walls of the groove are arranged at intervals relative to each other, and the two side walls are arranged corresponding to the two side walls of the groove;

The bottom wall of the tank and the two side walls of the tank jointly enclose the material-receiving cavity, and the bottom wall is arranged flush with the bottom wall of the tank.

Preferably, the side wall is arranged flush with the side wall of the groove, or from the direction close to the side wall of the groove to the direction away from the side wall of the groove, and the side wall is arranged inclined in a direction away from the center.

Preferably, it also includes:

The connecting piece is connected with the tank body and is located on the side close to the feed end.

Preferably, the flat outlet is a rectangular hole or an oblong hole.

Preferably, it also includes:

The downstream part is connected to the side of the rectifying part away from the tank body, and a downstream chamber is opened in the downstream part, and the downstream chamber is from the side close to the rectifying part to the side away from the rectifying part. One side of the downstream part is arranged through the downstream part, and the cross section of the downstream chamber is the same as that of the flat discharge port.

Preferably, it also includes:

The material receiving plate is connected with the tank body or the rectifying part, and along the thickness direction of the tank body, the material receiving plate is at least partly located outside the material receiving cavity, and the material receiving plate is used to receive The material dropped by the central throat pipe is introduced into the material receiving cavity or the material discharging cavity.

Compared with the prior art, the large blast furnace flat outlet distribution chute provided by the application includes a tank body and a rectification part, the tank body has a material receiving cavity, and the material receiving cavity has a feed end and a material distribution end; the rectification The part is connected with the tank body and is located on one side of the cloth end. The rectification part is provided with a discharge chamber that runs through the rectification part. The feed port of the discharge chamber is connected to the material receiving chamber connected, and the discharge port of the discharge chamber is a flat discharge port. Therefore, during the blast furnace material distribution process, the material in the tank body can first flow through the rectifying part, and then flow out to the blast furnace material surface through the flat discharge port, and the rectified material flow flows from the flat discharge port. The flow out of the material port can make the thickness of the material layer leaving the material distribution chute outlet as thin as possible without blocking the material, and effectively avoid the divergence and disorder of the material flow, effectively reduce the area of the scattering material flow, and make the rotating material parabolic The width of the material surface ring (material table) that falls to the material surface in the blast furnace is as narrow as possible to achieve precise material distribution.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the blast furnace distribution chute in the prior art;

Fig. 2 is the structural representation of the blast furnace distribution chute in the prior art;

Fig. 3 is the structural representation of the blast furnace distribution chute in the prior art;

Fig. 4 is the structural representation of the blast furnace distribution chute in the prior art;

Fig. 5 is the structural representation of the large blast furnace flat outlet distribution chute that embodiment one provides;

Fig. 6 is a schematic structural view of a preferred embodiment of the flat outlet distribution chute of the large blast furnace shown in Fig. 5;

Fig. 7 is the structural schematic diagram of the flat outlet distribution chute of the large blast furnace provided by the second embodiment;

Fig. 8 is the schematic structural view of the flat outlet distribution chute of the large blast furnace provided by the third embodiment;

Fig. 9 is the schematic structural view of the flat outlet distribution chute of the large blast furnace provided in Embodiment 4;

Fig. 10 is the structural representation of the flat outlet distribution chute of the large blast furnace provided by Embodiment five;

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

Fig. 12 is a structural schematic diagram of three different inclination angles of the large blast furnace flat outlet distribution chute in the blast furnace distribution system provided in the sixth embodiment.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution in the application, the technical solution in the embodiment of the application will be clearly and completely described below, obviously, the described embodiment is only a part of the embodiment of the application , but not all examples. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It should be noted that when an element is referred to as being "fixed" or "disposed on" another element, it may be directly disposed on another element or indirectly disposed on another element; when an element is referred to as being "connected" It may be directly connected to another element or indirectly connected to another element.

It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the conditions that this application can implement , so it has no technical substantive meaning, and any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the disclosure disclosed in this application without affecting the effect and purpose of this application. The technical content must be within the scope covered.

The application provides a large blast furnace flat outlet distribution chute, which includes a tank body and a rectification part, the tank body has a material receiving cavity, and the material receiving cavity has a feeding end and a material distribution end; the rectifying part and the connected to the tank and located on one side of the cloth end, the rectification part is provided with a discharge chamber that runs through the rectification part, the feed port of the discharge chamber communicates with the material receiving chamber, and The discharge port of the discharge chamber is a flat discharge port. The distribution chute at the flat outlet of the large blast furnace can effectively avoid the divergence and disorder of the material flow at the outlet, so as to realize precise distribution.

Embodiment one

Please refer to Figure 5 and Figure 6 together. This embodiment provides a large blast furnace flat outlet distribution chute 100, which is applied in a blast furnace to realize precise distribution of large blast furnaces. The flat outlet distribution chute 100 of the large blast furnace is mainly to control the height difference (thickness) of the outlet material layer and the flow direction of the material layer, and to reduce the turbulence of the material flow, wherein the large blast furnace refers to a blast furnace of 1500m ³ and above.

The large blast furnace flat outlet distribution chute 100 includes a tank body 10 and a rectifying portion 20, and the tank 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, through the The material receiving cavity 11 can well receive the material falling from the central throat. Preferably, in this embodiment, the material-receiving cavity 11 is an open material-receiving cavity, that is, the material-receiving cavity 11 is a semi-closed structure with an opening at the upper end, so that the center can be better matched. Falling material in the throat. The material receiving cavity has a feed end 111 and a material distribution end 112, wherein, it should be noted that the feed end 111 and the material distribution end 112 refer to the relative position area in the material receiving cavity 11, and the The feed end 111 can be in any desired position according to actual needs. For example, the feed end 111 can be located at the end or upper side of the tank body 10, as long as the material can be well received, and The material distributing end 112 is located at the end where the material needs to travel, so that the material can flow out from the material distributing end 112 after flowing into the material receiving chamber 11 from the feeding end 111 .

The rectifying part 20 is connected to the tank body 10, and the rectifying part 20 is located on the side of the tank body 10 close to the cloth end 112. 20 is provided with a discharge chamber 21, the feed port of the discharge chamber 21 communicates with the material receiving chamber 11, so that the material flowing out from the distribution end 112 can flow into the discharge chamber 21 correspondingly. The discharge port 211 of the discharge cavity 21 is a flat discharge port, wherein the flat discharge port refers to: the surroundings of the discharge port 211 are closed, which is a closed structure, so that the material passes through the discharge port. When the material outlet 211 flows out, it will not scatter around; meanwhile, the length dimension of the material outlet 211 is larger than the thickness dimension of the material outlet 211, so that the material can be effectively prevented from diverging from the upper side.

It can be understood that the outlet cross section of the blast furnace distribution chute in the prior art has arc (U) shape, square shape, trapezoid shape and inverted trapezoid shape. In the process of use, in order to meet the needs of cloth production, the blast furnace cloth chute needs to have two functions of tilting up and down and rotating. When material is distributed into the blast furnace during the rotation process, the material flow will be scattered when it enters the blast furnace through the inner cavity of the blast furnace distribution chute, and the centrifugal force generated by the rotating motion of the blast furnace distribution chute will make the scattering of the material flow more serious. The material band formed by the surface is wider, which is not conducive to precise process operation.

In order to achieve precise material distribution in large blast furnaces, it is mainly necessary to control the height difference (thickness) of the outlet material layer, control the flow direction of the material layer, and reduce material flow turbulence. In this embodiment, by setting the discharge port 211 of the rectifying part 20 into a flat structure, the height difference (thickness) of the outlet material layer is forcibly controlled, and the outlet flow is forcibly rectified. The flow section is rectangular and flat. The material flow is first concentrated on the left or right side of the flat outlet (or left or right depending on the direction of rotation of the large blast furnace flat outlet distribution chute 100), and then comes out from the discharge port 211 and is distributed to the blast furnace material surface. Reduce the area of scattering material flow, reduce the width of the material belt, effectively avoid the divergence and disorder of the material flow, and realize precise cloth. By arranging the rectifying part 20 and setting the discharge port 211 as a flat structure, the material can be well blocked and guided, and the material is better prevented from diverging from the left and right sides and the upper side of the discharge port, thereby Effectively control the flow of material flowing into the blast furnace, narrow the width of the material belt in the blast furnace, and better realize precise material distribution.

Preferably, the large blast furnace flat outlet distribution chute 100 further includes a downstream part 310, the downstream part 310 is connected to the side of the rectification part 20 away from the tank body 10, and the downstream part 310 A downstream cavity 311 is provided, and the downstream cavity 311 is set through the downstream portion 310 from the side close to the rectifying portion 20 to the side away from the rectifying portion 20, and the discharge of the downstream cavity 311 The mouth is a flat outlet. Specifically, in this embodiment, the cross-section of the downstream cavity 311 is the same shape as the flat outlet 211 of the rectifying part 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 provided to change the material flow from a turbulent state to a downstream state.

It can be understood that when only the rectifying part 20 is provided, when the material is doped with impurities (such as a steel rod of about 200 mm and a grate bar on the sintering machine mixed into the material), it is easy for the impurities to be stuck in the material. The flat outlet section of the rectifying part 20 causes material blocking. However, in this embodiment, the downstream portion 310 is provided on the rear side of the rectifying portion 20, which can effectively reduce the occurrence of debris blockage and ensure the normal delivery of materials.

Preferably, the rectifying portion 20 includes a bottom wall 22, a top wall 23 and a side wall 24, the bottom wall 22 is connected to the tank body 10, the top wall 23 is spaced from the bottom wall 22, and the The side wall 24 is connected to the tank body 10 , and two ends of the side wall 24 are respectively connected to the bottom wall 22 and the top wall 23 . There are two sidewalls 24 , and the two sidewalls 24 are arranged opposite to each other at intervals. The bottom wall 23 , the top wall 23 and the two sidewalls 24 jointly enclose the discharge chamber 21 . Therefore, the reliability of the connection between the rectifying part 20 and the tank body 10 can be better guaranteed, and at the same time, the material discharge chamber 21 can better receive the materials in the material receiving chamber 11 .

Preferably, the top wall 23 is arranged obliquely, and the thickness of the discharge chamber 21 gradually decreases from the direction of the feed inlet to the direction of the flat discharge outlet 211 . That is to say, in the discharge cavity 21, the thickness space on the side close to the feed opening is greater than the thickness space on the side close to the discharge opening 211, so that the discharge cavity 21 can better access The material in the material receiving chamber 11 makes the transition of material movement more gentle.

Preferably, the tank body 10 includes a tank bottom wall 12 and a tank side wall 13, the tank side wall 13 is connected to the tank bottom wall 12, and the tank side wall 13 is provided with two, two tank sides The side walls 13 are arranged at intervals relative to each other, and the two side walls 24 are arranged corresponding to the two groove side walls 13 . That is, one of the side walls 24 is correspondingly connected with one of the groove side walls 13 , and the other of the side walls 24 is correspondingly connected with the other of the groove side walls 13 . The tank bottom wall 12 and the two tank side walls 13 jointly enclose the material receiving chamber 11 , and the bottom wall 22 is arranged flush with the tank bottom wall 12 . Wherein said bottom wall 22 is arranged flush with said groove bottom wall 12 and refers to: the inner surface of said bottom wall 22 is flush with the inner surface of said groove bottom wall 12, and the outer surface of said bottom wall 22 is flush with the inner surface of said groove bottom wall 12. The outer surface of the groove bottom wall 12 is even. Therefore, when the material passes through the connection between the bottom wall 22 and the bottom wall 12 of the tank, it is smoother, avoiding material clogging, and at the same time, the structural strength of the bottom wall 22 can be guaranteed.

Preferably, the side wall 24 is arranged 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 . Therefore, when the material passes through the joint between the side wall 24 and the tank side wall 13 , it is smoother, avoiding material clogging, and at the same time, the structural strength of the side wall 24 can be ensured.

Preferably, the large blast furnace flat outlet distribution chute 100 also includes a connecting piece 30, the connecting piece 30 is connected to the tank body 10 and is located on the side close to the feed end 111, so that the connecting piece 30 can It is convenient for the flat outlet distribution chute 100 of the large blast furnace to be connected with the central throat. Wherein, the connecting piece 30 can specifically be a connecting ear type structure or a hook type structure, so that it can be connected with the central throat or the distributor.

Preferably, the flat discharge port 211 is an oblong hole, that is, the flat discharge port 211 has an oblong structure, and the flat discharge port 211 has rounded corners with arc transitions around.

The large blast furnace flat outlet distribution chute 100 provided in this embodiment has a significantly narrower and more uniform distribution opening width, realizes precise distribution, improves the distribution condition in the blast furnace, and the ratio of furnace charges, increases output, and reduces energy consumption.

It can be understood that the large blast furnace flat outlet distribution chute 100 provided in this embodiment additionally arranges the rectification part 20 on the rear side of the tank body 10 instead of directly on both sides of the tank body 10 Set up the bezel. One is that the rectifying part 20 can have a certain accommodation and buffering effect, and the other is that it can also prevent the material from falling directly on the baffle and rebounding and diverging, so that the material cannot fall well into the distribution chute at the flat outlet of the large blast furnace. At the same time, the height (thickness) difference of the material flow can also be well controlled through the flat discharge port 211 .

It is understandable that the larger the blast furnace, the lower the utilization factor of the blast furnace. One of the reasons is that the larger the blast furnace, the larger the inner diameter of the furnace, and the larger the diameter of the cloth. The width of the material platform (the concentric ring width of the material under the same angle) that the flat outlet distribution chute diverges is wider, and the flat outlet distribution chute of the large blast furnace in the prior art, because the wider the material platform width, the coke, sintering It is difficult to accurately deliver the ore, pellets, etc. to the required interval. In order to achieve precise material distribution in large blast furnaces, it is mainly necessary to control the height difference (thickness) of the outlet material side, control the flow direction of the material layer, and reduce material flow turbulence.

Preferably, the large blast furnace flat outlet distribution chute 100 is mainly used for blast furnaces with a size ^{of 1500} m and above, the overall length of the large blast furnace flat outlet distribution chute 100 is more than 2500 mm, and the thickness of the flat discharge port 211 is controlled at Between 200 and 400mm. More preferably, the thickness of the flat discharge opening 211 is between 300-350 mm, so that the large-scale blast furnace can be more accurately distributed.

Preferably, in one embodiment, the large blast furnace flat outlet distribution chute 100 can be divided into a first straight line section, a second straight line section and a spout section along its length direction, and the second straight line section is arranged on the The discharge side of the first straight section, and the installation direction of the second straight section is inclined upward relative to the first straight section. The spout section is arranged on the discharge side of the second straight section, and the installation direction of the spout section is inclined upward relative to the second straight section. Thereby make described big blast furnace flat outlet distribution chute 100 when distribution, can distribute farther, thereby the diameter of blast furnace body can be designed larger, and there is a small amount of local material accumulation at the landing point, which plays the role of buffering.

Embodiment two

Please refer to Figure 7 in conjunction. 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 Embodiment 1, the difference lies in:

In this embodiment, the flat outlet 210 is a rectangular hole.

Embodiment three

Please refer to Figure 8 in conjunction. 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 Embodiment 1, the difference lies in:

In this embodiment, the rectification unit 410 is different from the first embodiment. 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 rectification part 410 is inclined to the direction away from the center, so that the rectification part 410 can be widened, so that all The material receiving cavity in the rectifying part 410 can better the rectifying part 410, and can also better increase the volume of the material receiving cavity, avoid material accumulation, and can also 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 portion 410 can be set in an inclined state.

Embodiment four

Please refer to Figure 9 together. 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 Embodiment 1, the difference lies in:

In this embodiment, the rectification unit 510 is different from that in the second embodiment. Specifically, the top wall 520 of the rectifying part 510 is provided with an anti-blocking groove 530 penetrating through the top wall 520 , and the anti-blocking groove 530 communicates with the flat discharge port 540 and the cloth end 550 . Therefore, through the anti-blocking groove 530, the material can be prevented from being blocked at the rectifying portion 510, so that the material can flow more smoothly. From the direction close to the bottom wall 560 to the direction away from the bottom wall 560 , the surface 570 surrounding the anti-blocking groove 530 on the top wall 520 is inclined towards the center. Therefore, when the flat outlet distribution chute 500 of the large blast furnace distributes materials along a positive inclined angle, the surface 570 can guide the materials in the anti-blocking groove 530 to a certain extent, and guide the materials into the discharge chamber to ensure Precision cloth.

Embodiment five

Please refer to Figure 10 in conjunction. 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 Embodiment 4, the difference lies in:

In this embodiment, the large blast furnace flat outlet distribution chute 600 also includes a material receiving plate 610, the material receiving plate 610 is connected with the tank body 620 or the rectifying portion 630, and along the thickness direction of the tank body 620 (Fig. 10 ), the material receiving plate 610 is at least partially located outside the material receiving cavity 640 , that is, the material receiving plate 610 at least partially extends out of the groove body 620 . The material receiving plate 610 is used to receive the material dropped from the central throat, and is used to guide the material into the material receiving cavity 640 or the material discharging cavity 650 . Therefore, when the flat outlet distribution chute 600 of the large blast furnace is arranged at an angle perpendicular to the central throat, the dropped material can be smoothly picked up through the material receiving plate 610, so that the material is introduced into the material receiving The cavity 640 or the discharge cavity 650 can better realize precise material distribution. Specifically, the material receiving plate 610 is inclined relative to the side wall of the tank body 620, and the part of the material receiving plate 610 outside the tank body 620 is in the shape of an opening, so that materials can be better received. It can also further prevent material splashing.

Embodiment six

Please refer to Figure 11 and Figure 12 together. This embodiment provides a blast furnace distribution system 1000, which includes a central throat 700 and a large blast furnace flat outlet distribution chute installed on the central throat, wherein the large blast furnace flat outlet distribution chute in this embodiment adopts the implementation The flat outlet distribution chute 600 of the large blast furnace in Example 5.

It can be understood that the flat outlet distribution chute of the large blast furnace in the prior art is not equipped with a receiving plate. When the material is tilted up and down, the material coming down from the central throat is slightly divergent. When the flat outlet distribution chute of the large blast furnace is tilted When it is closer to the vertical, some materials will fall directly into the blast furnace without passing through the flat outlet distribution chute of the large blast furnace, which is not conducive to precise process operation.

However, the blast furnace distribution system 1000 in this embodiment adopts the large blast furnace flat outlet distribution chute 600, so that the materials coming down from the central throat 700 can be better received through the receiving plate 610, Better realization of precise cloth.

Compared with the prior art, the large blast furnace flat outlet distribution chute provided by the application includes a tank body and a rectification part, the tank body has a material receiving cavity, and the material receiving cavity has a feed end and a material distribution end; the rectification The part is connected with the tank body and is located on one side of the cloth end. The rectification part is provided with a discharge chamber that runs through the rectification part. The feed port of the discharge chamber is connected to the material receiving chamber connected, and the discharge port of the discharge chamber is a flat discharge port. Therefore, during the blast furnace material distribution process, the material in the tank body can first flow through the rectifying part, and then flow out to the blast furnace material surface through the flat discharge port, and the rectified material flow flows from the flat discharge port. The flow out of the material port can make the thickness of the material layer leaving the material distribution chute outlet as thin as possible without blocking the material, and effectively avoid the divergence and disorder of the material flow, effectively reduce the area of the scattering material flow, and make the rotating material parabolic The width of the material surface ring (material table) that falls to the material surface in the blast furnace is as narrow as possible to achieve precise material distribution.

What has been described above is only the embodiment of the present application. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present application, but these all belong to the present application. scope of protection.

Claims (10)

1. A large blast furnace flat outlet distribution chute is characterized in that it includes:

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

   The rectification part is connected with the tank body and is located on the side of the tank body close to the cloth end. The rectification part is provided with a discharge cavity that runs through the rectification part. The discharge cavity The material inlet is in communication with the material receiving chamber, and the material outlet of the material outlet chamber is a flat type outlet.
2. The large blast furnace flat outlet distribution chute according to claim 1 is characterized in that it also includes:

   The downstream part is connected to the side of the rectifying part away from the tank body, and a downstream chamber is opened in the downstream part, and the downstream chamber is from the side close to the rectifying part to the side away from the rectifying part. One side of the part is set through the downstream part, and the discharge port of the downstream chamber is a flat discharge port.
3. The large blast furnace flat outlet distribution chute according to claim 1, wherein the rectification part comprises:

   a bottom wall connected to the tank;

   a top wall spaced apart from the bottom wall;

   The side wall is connected to the tank body, and the two ends are respectively connected to the bottom wall and the top wall. There are two side walls, and the two side walls are relatively spaced apart;

   The bottom wall, the top wall and the two side walls jointly enclose the discharge chamber.
4. The flat outlet distribution chute of a large blast furnace according to claim 3, wherein an anti-blocking groove penetrating through the top wall is provided on the top wall, and the anti-blocking groove communicates with the flat discharge port and The cloth end, and from the direction close to the bottom wall to the direction away from the bottom wall, the surface surrounding the anti-blocking groove on the top wall is inclined to the direction close to the center.
5. The flat outlet distribution chute of a large blast furnace according to claim 3, wherein the top wall is arranged obliquely, and from the direction of the feed inlet to the direction of the flat outlet, the thickness of the discharge chamber is slowing shrieking.
6. The large blast furnace flat outlet distribution chute according to claim 5, wherein the trough body comprises:

   tank bottom wall;

   The side wall of the groove is connected with the bottom wall of the groove, and the side wall of the groove is provided with two, the side walls of the two grooves are relatively spaced apart, and the side walls of the two grooves are arranged corresponding to the side walls of the groove;

   The bottom wall of the tank and the two side walls of the tank jointly enclose the material-receiving cavity, and the bottom wall is arranged flush with the bottom wall of the tank.
7. The flat outlet distribution chute of a large blast furnace according to claim 6, wherein the side wall is arranged flush with the side wall of the trough, or from the direction close to the side wall of the trough to the direction away from the side wall of the trough, The side walls are inclined away from the center.
8. The large blast furnace flat outlet distribution chute according to claim 1 is characterized in that it also includes:

   The connecting piece is connected with the tank body and is located on the side close to the feed end.
9. The large blast furnace flat outlet distribution chute according to any one of claims 1 to 8, characterized in that the flat outlet is a rectangular hole or an oblong hole.
10. The large blast furnace flat outlet distribution chute according to claim 9, further comprising:

    The material receiving plate is connected with the tank body or the rectifying part, and along the thickness direction of the tank body, the material receiving plate is at least partly located outside the material receiving cavity, and the material receiving plate is used to receive The material dropped by the central throat pipe is introduced into the material receiving cavity or the material discharging cavity.

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