Blast furnace material distribution chute

Abstract

The invention discloses a blast furnace distribution chute, comprising an outer shell and a wear-resistant component fixed in the outer shell, the outer shell comprising a goose head body and a trough body, the rear end of the goose head body being fixedly connected to the trough body, the goose head body comprising a goose head trough body and a goose head, the length of the goose head trough body being greater than or equal to 1750 mm, the goose head being arranged at the upper parts of both sides of the goose head trough body, the thickness of the goose head being greater than the thickness of the goose head trough body, due to the use of an extended goose head body, the joint position of the goose head body and the trough body avoiding the high-temperature airflow in the center of the blast furnace, the influence of the high temperature on the joint position can be reduced, thereby effectively preventing high-temperature burning failure; at the same time, due to the use of a local thickening of the goose head at the front end of the goose head body, sufficient strength and rigidity can be guaranteed, and the overall thickening of the goose head body can be avoided, thereby avoiding the weight increase of the chute due to the lengthening of the goose head body.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace ironmaking, and in particular to a blast furnace material distribution chute. Background Art

[0002] With the development of science and technology, the current ironmaking plants mainly use bell-less blast furnaces as ironmaking furnaces. Among them, the distribution chute is an essential equipment for the bell-less blast furnace. It is the last channel for the charge to enter the blast furnace body. The charge is evenly distributed to various parts of the upper part of the blast furnace through the rotation of the distribution chute. Since the distribution chute is always located above the charge during operation, it is always in a harsh working environment such as high temperature, oxidation and scouring.

[0003] In the prior art, the goose head and the trough of the blast furnace distribution chute are generally cast as a whole or are formed as a whole separately and then connected by bolts and welded. The former is easy to produce various casting defects during the integral casting due to the large overall size of the blast furnace distribution chute, and the heat resistance and corrosion resistance are poor; the latter is easy to burn and corrode quickly under the influence of high temperature because the trough length of the goose head is about 800mm, the joint position and the connecting bolts are located in the high temperature area of ​​the central airflow of the blast furnace, resulting in failure of the current blast furnace distribution chute due to high temperature burning and cracking at the joint position, and the service life is short. The blast furnace distribution chute needs to be replaced frequently, which not only increases the use cost, but also greatly affects the production efficiency.

[0004] Therefore, how to provide a blast furnace distribution chute that can effectively prevent the high-temperature burning of the central airflow of the blast furnace and increase its service life is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a blast furnace distribution chute, which can reduce the high temperature impact of the high-temperature airflow in the center of the blast furnace on the seam position, effectively improve the service life, and at the same time avoid the overall thickening of the goose head body, which causes the weight gain of the chute to affect its use.

[0006] The present invention provides a blast furnace distribution chute, comprising an outer shell and a wear-resistant component fixed in the outer shell, the outer shell comprising a goose head body and a trough body, the rear end of the goose head body is fixedly connected to the trough body, the goose head body comprises a goose head trough body and a goose head, the length of the goose head trough body is greater than or equal to 1750mm, the goose head is arranged on the upper parts of both sides of the goose head trough body, and the thickness of the goose head is greater than the thickness of the goose head trough body.

[0007] Preferably, the goose head includes two goose head reinforcement plates, and the two goose head reinforcement plates are respectively fixed to the upper parts of both sides of the goose head trough body by screws.

[0008] Preferably, the goose head includes two goose head plates and two goose head lining plates, the two goose head plates are integrally formed with the upper parts of both sides of the goose head trough body, and the two goose head lining plates are fixed to one side of the two goose head plates by screws.

[0009] Preferably, a pressure block is fixed to the tail of the goose head lining plate by bolts, and a limiting block is welded and fixed to the side of the goose head lining plate.

[0010] Preferably, a stress release groove is provided on the goose head body, and a heat-resistant protective layer is fixed to the outer surface of the bottom of the goose head body through a pressure strip.

[0011] Preferably, the length of the goose head trough body is 2100-3200 mm.

[0012] Preferably, the wear-resistant component includes a discharge liner, a feed liner, a buffer liner, an inlet liner and a return liner fixed in sequence in the length direction of the shell, and a plurality of first baffles and second baffles are installed at intervals on the discharge liner, the feed liner, the buffer liner and the inlet liner, and the length of the first baffle is greater than that of the second baffle, and a third baffle is installed on the return liner.

[0013] Preferably, the first baffle plate, the second baffle plate and the third baffle plate are all built-up with a wear-resistant layer.

[0014] Preferably, an impact plate is welded to the feed liner via a support plate, and wear-resistant nails are installed on the impact plate.

[0015] Preferably, a fourth baffle is installed on the top of the return material liner, and the height of the fourth baffle is greater than the height of the third baffle.

[0016] The blast furnace charging chute provided by the present invention comprises an outer shell and a wear-resistant component fixed in the outer shell, the outer shell comprises a goose head body and a trough body, the rear end of the goose head body is fixedly connected to the trough body, the goose head body comprises a goose head trough body and a goose head, the length of the goose head trough body is greater than or equal to 1750mm, the goose head is arranged on the upper parts of both sides of the goose head trough body, the thickness of the goose head is greater than the thickness of the goose head trough body, due to the use of an extended goose head body, the joint position of the goose head body and the trough body avoids the high-temperature airflow in the center of the blast furnace, the high temperature influence on the joint position can be reduced, thereby effectively preventing high-temperature burning failure; at the same time, due to the local thickening of the goose head at the front end of the goose head body, sufficient strength and rigidity can be guaranteed, and the overall thickening of the goose head body can be avoided, thereby avoiding the weight increase of the chute due to the lengthening of the goose head body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a blast furnace distribution chute provided by an embodiment of the present invention;

[0019] Figure 2 A half-section schematic diagram of a blast furnace distribution chute provided in an embodiment of the present invention;

[0020] Figure 3 A schematic structural diagram of a housing provided by an embodiment of the present invention;

[0021] Figure 4 A schematic side view of a housing provided by an embodiment of the present invention;

[0022] Figure 5 A schematic structural diagram of another housing provided by an embodiment of the present invention;

[0023] Figure 6 A half-section schematic diagram of another housing provided by an embodiment of the present invention;

[0024] Figure 7 A schematic structural diagram of a wear-resistant component provided by an embodiment of the present invention;

[0025] Figure 8 A half-section schematic diagram of a discharge liner provided in an embodiment of the present invention;

[0026] Fig. 9 A half-section schematic diagram of a material transfer liner provided in an embodiment of the present invention;

[0027] Fig.10 A half-section schematic diagram of a buffer liner provided in an embodiment of the present invention;

[0028] Fig.11 A half-section schematic diagram of a feed liner provided in an embodiment of the present invention;

[0029] Fig.12 A half-section schematic diagram of a return material liner provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0031] 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.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0034] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which this application can be implemented, so they have no substantive technical significance. Any structural modification, change in proportion 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.

[0035] See also Figures 1 to 12 , Figure 1 A schematic diagram of the structure of a blast furnace distribution chute provided by an embodiment of the present invention; Figure 2 A half-section schematic diagram of a blast furnace distribution chute provided in an embodiment of the present invention; Figure 3 A schematic structural diagram of a housing provided by an embodiment of the present invention; Figure 4 A schematic side view of a housing provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of another housing provided by an embodiment of the present invention; Figure 6A half-section schematic diagram of another housing provided by an embodiment of the present invention; Figure 7 A schematic structural diagram of a wear-resistant component provided by an embodiment of the present invention; Figure 8 A half-section schematic diagram of a discharge liner provided in an embodiment of the present invention; Fig. 9 A half-section schematic diagram of a material transfer liner provided in an embodiment of the present invention; Fig.10 A half-section schematic diagram of a buffer liner provided in an embodiment of the present invention; Fig.11 A half-section schematic diagram of a feed liner provided in an embodiment of the present invention; Fig.12 A half-section schematic diagram of a return material liner provided in an embodiment of the present invention.

[0036] The blast furnace charging chute provided by an embodiment of the present invention comprises an outer shell 1 and a wear-resistant component 2 fixed in the outer shell 1, the outer shell 1 comprises a goose head body 11 and a trough body 12, the rear end of the goose head body 11 is fixedly connected to the trough body 12, the goose head body 11 comprises a goose head trough body 111 and a goose head 112, the length of the goose head trough body 111 is greater than or equal to 1750mm, the goose head 112 is arranged on the upper parts of both sides of the goose head trough body 111, and the thickness of the goose head 112 is greater than the thickness of the goose head trough body 111.

[0037] In the embodiment of the present invention, the shell 1 includes a goose head body 11 and a trough body 12, and a wear-resistant component 2 is fixed inside to reduce the wear caused by materials during work. The rear end of the goose head body 11 and the front end of the trough body 12 are fixed as a whole by welding. The goose head body 11 includes a goose head trough body 111 and a goose head 112, and the length of the goose head trough body 111 is greater than or equal to 1750 mm. Due to the use of an extended goose head body 11, the joint position of the goose head body 11 and the trough body 12 avoids the high-temperature airflow in the center of the blast furnace, which can reduce the high temperature impact on the joint position, thereby effectively preventing high-temperature burning failure; at the same time, the goose head 112 is arranged on the upper parts of both sides of the goose head trough body 111, and the thickness of the goose head 112 is greater than the thickness of the goose head trough body 111. Since the front end of the goose head body 11 is locally thickened by the goose head 112, sufficient strength and rigidity can be guaranteed to avoid the overall thickening of the goose head body 11, thereby avoiding the weight increase of the chute due to the lengthening of the goose head body 11.

[0038] In specific implementation, a top plate 113 is welded to the front end of the goose head body 11, and an end plate 114 is welded to the rear end of the tank body 12, so that both ends of the shell 1 are closed. A crossbeam 115 is fixed to the middle and tail of the tank body 12 to shape the tank body 12, and a crossbeam wear-resistant layer 116 is welded on the crossbeam 115 to reduce wear.

[0039] like Figure 3 and Figure 4 As shown, as a preferred embodiment of the present invention, the goose head 112 includes two goose head reinforcement plates, and the two goose head reinforcement plates are respectively fixed to the upper parts of both sides of the goose head trough body 111 by screws.

[0040] In the embodiment of the present invention, the goose head 112 is composed of two single goose head reinforcement plates, which are fixed to the upper parts of both sides of the goose head trough 111 by screws respectively, and the thickness thereof is greater than the thickness of the goose head trough 111, so that the head position of the goose head body 11 is locally thickened to ensure sufficient strength and rigidity, and avoid the overall thickening of the goose head body 11. In specific implementation, in order to ensure the connection strength, the goose head reinforcement plate and the goose head trough 111 can be further fixed by welding.

[0041] like Figure 5 and Figure 6 As shown, as another preferred embodiment of the present invention, the goose head 112 includes two goose head plates 1121 and two goose head lining plates 1122. The two goose head plates 1121 are integrally formed with the upper parts of both sides of the goose head trough body 111, and the two goose head lining plates 1122 are fixed to one side of the two goose head plates 1121 by screws.

[0042] Furthermore, in the above embodiment, a pressure block 1123 is fixed to the tail of the goose head liner 1122 by bolts, and a limiting block 1124 is welded and fixed to the side of the goose head liner 1122 .

[0043] The difference between this embodiment and the previous embodiment is that the goose head 112 is composed of two goose head plates 1121 and two goose head lining plates 1122, which are fixed by screws respectively, wherein the two goose head plates 1121 are integrally formed with the upper parts of both sides of the goose head trough body 111, and the two goose head lining plates 1122 are fixed by screws on one side of the two goose head plates 1121 for reinforcement. At the same time, the tail of the goose head lining plate 1122 is fixed with a pressure block 1123 by bolts, and the inner side of the goose head lining plate 1122 is welded and fixed with a limit block 1124 to ensure sufficient strength and rigidity. It can be understood that the goose head plate 1121 has the same thickness as the goose head body 11. When a goose head 112 of different thickness is required, the goose head lining plate 1122 of the corresponding thickness can be processed and fixed on the goose head plate 1121, which is more flexible. In the specific implementation, in order to ensure the connection strength, the goose head plate 1121 and the goose head lining plate 1122 can be further fixed by welding.

[0044] In order to prevent the goose head body 11 from thermal deformation at high temperatures, in some preferred embodiments of the present invention, a stress release groove is provided on the goose head body 11.

[0045] In order to further improve the service life of the blast furnace distribution chute, in some preferred embodiments of the present invention, a heat-resistant protective layer 118 is fixed to the outer surface of the bottom of the goose head body 11 through a pressure strip 117.

[0046] In specific implementation, the heat-resistant protective layer 118 is made of high-temperature heat-resistant cloth, and is fixed to the outer surface of the bottom of the goose head body 11 by means of a pressure strip 117 through screws. Its position is above the blast furnace fire source, which can effectively isolate the high-temperature airflow in the center of the blast furnace from the high-temperature impact of the blast furnace distribution chute, thereby further improving its service life.

[0047] During specific implementation, the length of the goose head tank body 111 is preferably 2100 mm to 3200 mm, and more preferably 2100 mm to 2300 mm.

[0048] As a preferred embodiment of the present invention, the wear-resistant component 2 includes a discharge liner 21, a feed liner 22, a buffer liner 23, an inlet liner 24 and a return liner 25 fixed in sequence in the length direction of the shell 1, and a plurality of first baffles 26 and second baffles 27 are installed at intervals on the discharge liner 21, the feed liner 22, the buffer liner 23 and the inlet liner 24, the length of the first baffle 26 is greater than the length of the second baffle 27, and a third baffle 28 is installed on the return liner 25.

[0049] In the embodiment of the present invention, the discharge liner 21, the feed liner 22, the buffer liner 23, the feed liner 24 and the return liner 25 all adopt a material abrasive structure, and are fixed to the outer shell 1 by bolts from the rear end of the trough body 12 to the front end of the goose head body 11 in sequence, and are circumferentially positioned by a pressing block. A plurality of first baffles 26 and second baffles 27 are welded to the discharge liner 21, the feed liner 22, the buffer liner 23 and the feed liner 24, respectively. The first baffle 26 and the second baffle 27 are installed at intervals, and the length of the first baffle 26 is greater than the length of the second baffle 27, so that the bolt head at the connection position of the wear-resistant component 2 and the outer shell 1 is isolated into a small space to protect the bolt from being worn by the material during operation. The return liner 25 is fixed to the front end of the goose head body 11, located below the goose head liner 1122, and a third baffle 28 is installed on the return liner 25. The first baffle 26, the second baffle 27 and the third baffle 28 all adopt a material abrasive structure. When the blast furnace material distribution chute is working, the first baffle 26, the second baffle 27 and the third baffle 28 withstand the scouring of materials, effectively preventing the shell 1 from serious deformation, breakage, falling off and other accidents.

[0050] In order to further reduce the wear caused by materials and increase the service life of the blast furnace distribution chute, in some preferred embodiments of the present invention, the first baffle 26, the second baffle 27 and the third baffle 28 are all welded with a wear-resistant layer 29.

[0051] As a preferred embodiment of the present invention, an impact plate 242 is welded to the feed liner 24 via a support plate 241 , and wear-resistant nails 243 are installed on the impact plate 242 .

[0052] In the embodiment of the present invention, two impact plates 242 are welded to the feed liner 24 through four support plates 241, and a plurality of wear-resistant nails 243 are orderly installed on the two impact plates 242. When the material enters the blast furnace distribution chute, the wear-resistant nails 243 and the impact plate 242 can not only reduce the impact of the material on the first baffle 26 and the second baffle 27, but also reduce the wear of the material on the first baffle 26 and the second baffle 27.

[0053] In specific implementation, since the material sliding speed at the discharge port is the largest, the welding gap between the first baffle 26 and the second baffle 27 installed on the discharge liner 21 should be relatively tight to improve wear resistance, and the spacing is preferably 30mm to 70mm, and more preferably 50mm. The welding gap between the first baffle 26 and the second baffle 27 installed on the overfeed liner 22 should not be too large or too small, and the spacing is preferably 80mm near the discharge port and 100mm away from the discharge port. The welding gap between the first baffle 26 and the second baffle 27 installed on the buffer liner 23 should also not be too large or too small, and the spacing is preferably 100mm. The spacing between the first baffle 26 and the second baffle 27 installed on the feed liner 24 is preferably 120mm to 180mm, and more preferably 150mm.

[0054] As a preferred embodiment of the present invention, a fourth baffle 251 is installed on the top of the return material liner 25, and the height of the fourth baffle 251 is greater than the height of the third baffle 28. In the embodiment of the present invention, the fourth baffle 251 is welded to the top of the return material liner 25, and the height of the fourth baffle 251 is relatively high to prevent materials from entering the housing 1.

[0055] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A blast furnace distribution chute, characterized in that: It comprises a shell and a wear-resistant component fixed in the shell, the shell comprises a goose head body and a trough body, the rear end of the goose head body is fixedly connected to the trough body, the goose head body comprises a goose head trough body and a goose head, the length of the goose head trough body is greater than or equal to 1750mm, the goose head is arranged at the upper parts of both sides of the goose head trough body, and the thickness of the goose head is greater than the thickness of the goose head trough body; The goose head includes two goose head plates and two goose head lining plates. The two goose head plates are integrally formed with the upper parts of both sides of the goose head trough body, and the two goose head lining plates are fixed to one side of the two goose head plates by screws.

2. The blast furnace distribution chute according to claim 1, characterized in that: A pressing block is fixed to the tail of the goose head lining plate by bolts, and a limiting block is fixed to the side of the goose head lining plate by welding.

3. The blast furnace distribution chute according to claim 1, characterized in that: A stress release groove is provided on the goose head body, and a heat-resistant protective layer is fixed on the outer surface of the bottom of the goose head body through a pressure strip.

4. The blast furnace distribution chute according to claim 1, characterized in that: The length of the goose head trough body is 2100~3200mm.

5. The blast furnace distribution chute according to claim 1, characterized in that: The wear-resistant component includes a discharge liner, a feed liner, a buffer liner, an inlet liner and a return liner fixed in sequence in the length direction of the shell, and a plurality of first baffles and second baffles are installed at intervals on the discharge liner, the feed liner, the buffer liner and the inlet liner, and the length of the first baffle is greater than that of the second baffle, and a third baffle is installed on the return liner.

6. The blast furnace distribution chute according to claim 5, characterized in that: The first baffle plate, the second baffle plate and the third baffle plate are all built-up with a wear-resistant layer.

7. The blast furnace distribution chute according to claim 5, characterized in that: An impact plate is welded on the feed liner through a support plate, and wear-resistant nails are installed on the impact plate.

8. The blast furnace distribution chute according to claim 5, characterized in that: A fourth baffle is installed on the top of the return material liner, and the height of the fourth baffle is greater than the height of the third baffle.

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