Furnace throat steel brick fixing structure
By using a baffle to protect the fixings in the throat steel brick fixing structure, the problem of damage to the internal threaded holes at high temperatures is solved, the steel bricks are stably fixed, and the safe operation of the blast furnace is ensured.
Patent Information
- Application Number
- CN202422864377.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-22
AI Technical Summary
In the prior art, the internal threaded holes of the throat steel bricks are easily damaged under high temperature and high pressure environments, resulting in fixation failure and falling, affecting the stable operation of the blast furnace and the smelting efficiency.
A furnace throat steel brick fixing structure is adopted, including fixing parts and baffles. The fixing parts pass through the through holes of the steel bricks and are detachably connected to the furnace shell. The baffles are installed in the accommodating cavity and have a higher melting point than the fixing parts. They block heat from entering the through holes, protect the fixing parts from melting, and ensure that the steel bricks are fixed.
The possibility of steel brick fixation failure and falling is reduced, the stability and safety of the blast furnace are improved, and the normal operation of the blast furnace is ensured.
Smart Images
Figure CN223445567U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of iron making blast furnace technical field, especially related to the fixed structure of furnace throat steel brick. BACKGROUND
[0002] In the iron making industry, as a key equipment, the design of the furnace throat part of the blast furnace is of great significance to ensure the stable operation and efficient smelting of the blast furnace. At present, the furnace throat part of the blast furnace of the iron making plant is designed to use furnace throat steel bricks as the protection of the furnace shell. In order to ensure that the steel bricks can be firmly fixed on the furnace shell, an internal thread structure is designed on the steel brick body, which is connected with the steel brick through a double-end fixing piece, and the other end is passed through the furnace shell, and is fixed on the furnace shell by using a limiting piece, so that the stable installation of the steel brick is realized.
[0003] However, under the long-term high temperature and high pressure environment, the internal thread hole of the furnace throat steel brick will be affected by thermal stress, resulting in thread damage. Once the thread is damaged, the fixing effect of the steel brick will be greatly reduced, and even the steel brick may fall off. This not only causes the furnace shell of the furnace throat part to lose protection, making the furnace shell temperature too high, but also may affect the direction of the blast furnace process operation air flow in the furnace, thereby negatively affecting the stable operation and smelting efficiency of the blast furnace.
[0004] Therefore, in view of the problems existing in the prior art, the present application proposes a new type of furnace throat steel brick fixing structure to solve the problems of steel brick fixing failure and falling caused by thread damage of the internal thread hole of the steel brick due to heat washing, and to ensure the stable and safe operation of the blast furnace. INVENTION CONTENTS
[0005] The utility model provides a furnace throat steel brick fixing structure for solving the technical problems of steel brick fixing failure and falling caused by thread damage of the internal thread hole of the steel brick due to heat washing.
[0006] The utility model realizes the following technical scheme: a furnace throat steel brick fixing structure, comprising a furnace fixing piece and a shielding plate, wherein the steel brick has a first through hole, one end of the fixing piece passes through the first through hole and is detachably connected with the shell; the side of the steel brick away from the furnace shell is provided with a containing cavity, the containing cavity is in communication with the first through hole, the shielding plate is installed in the containing cavity to block the side of the containing cavity away from the furnace shell, and the melting point of the shielding plate is higher than that of the fixing piece.
[0007] Optionally, the fixing member comprises a rod and a limiting member, the rod is inserted into the first through hole, the furnace shell has a second through hole, the rod extends out of the furnace shell through the second through hole, the limiting member is installed on the end of the rod far away from the shielding plate, and the limiting member abuts against the side of the furnace shell far away from the steel brick, so that the rod is prevented from moving along the axial direction of the second through hole to the side of the steel brick.
[0008] Optionally, the fixing member comprises a rod and a limiting member, the rod is inserted into the first through hole, the furnace shell has a second through hole, the rod extends out of the furnace shell through the second through hole, the limiting member is installed on the end of the rod far away from the shielding plate, and the limiting member abuts against the side of the furnace shell far away from the steel brick, so that the rod is prevented from moving along the axial direction of the second through hole to the side of the steel brick.
[0009] Optionally, the limiting member is a nut.
[0010] Optionally, the steel brick is provided with a protrusion, and the through hole is arranged on the protrusion.
[0011] Optionally, the cross section of the accommodating cavity is square, and the shielding plate is matched with the accommodating cavity.
[0012] Optionally, the number of the first through holes is plural, and the accommodating cavity, the shielding plate, the fixing member, the limiting member and the first through holes are in one-to-one correspondence.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] The furnace throat steel brick fixing structure comprises a furnace fixing member and a shielding plate, the steel brick has a first through hole, one end of the fixing member passes through the first through hole and is detachably connected with the shell body, one side of the steel brick far away from the furnace shell is provided with an accommodating cavity, the accommodating cavity is communicated with the first through hole, the shielding plate is installed in the accommodating cavity to block one side of the accommodating cavity far away from the furnace shell, and the melting point of the shielding plate is higher than that of the fixing member.
[0015] By the above structure, the furnace throat steel brick fixing structure provided by the utility model fixes the steel brick, first, the steel brick is laid on the inner wall of the furnace shell, the side of the steel brick away from the accommodating cavity is abutted against the inner wall of the furnace shell, then one end of the fixing piece is arranged in the first through hole from the accommodating cavity and is detachably connected with the furnace shell along the first through hole, so that the fixing piece supports the steel brick, the baffle is installed in the accommodating cavity, the baffle blocks the accommodating cavity, the fixing piece is abutted against the baffle, so as to block the fixing piece from sliding along the axial direction of the first through hole away from the furnace wall, the melting point of the baffle is higher than that of the fixing piece, so that when the temperature in the furnace shell rises, the fixing piece melts later than the baffle, so as to protect the fixing piece. Therefore, in the furnace throat steel brick fixing structure, the baffle blocks the heat in the furnace from entering the first through hole, reduces the influence of the heat on the fixing piece and the first through hole, the fixing piece supports the steel brick in the first through hole, the fixing piece is only used for supporting the steel brick in the first through hole, when the temperature in the furnace shell rises, the fixing piece melts later than the baffle, so as to protect the support of the fixing piece to the steel brick, so that the possibility of fixing failure or falling of the steel brick is reduced, and the blast furnace can operate more stably and safely. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.
[0017] Figure 1 It is the structural schematic diagram of the furnace throat steel brick fixing structure provided by the utility model;
[0018] Figure 2 It is Figure 1 The enlarged structural schematic diagram of the A area in
[0019] Figure 3 It is the structural schematic diagram of the steel brick in the embodiment of the utility model;
[0020] Figure 4 It is the structural schematic diagram of the fixing piece in the embodiment of the utility model.
[0021] In the drawing:
[0022] 1-fixing piece; 11-rod body; 12-limiting piece; 2-baffle; 3-stop block; 4-furnace shell; 41-second through hole; 5-steel brick; 51-protrusion; 52-accommodating cavity; 53-first through hole. DETAILED DESCRIPTION
[0023] In the description of the present application, it needs to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional 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 particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0024] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0025] In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.
[0027] The utility model provides a furnace throat steel brick fixing structure for solving the technical problem of steel brick fixed failure and falling caused by the thread damage of steel brick internal screw hole because of heat washing, the utility model provides a furnace throat steel brick fixing structure including fixed part 1 and baffle 2, wherein:
[0028] The first through hole 53 is arranged on the steel brick 5, and the first through hole 53 is arranged in a direction perpendicular to the surface of the steel brick 5. One end of the fixing part 1 is detachably installed on the furnace shell 4 through the first through hole 53. Specifically, the furnace shell 4 has a cavity, which is the core area of the heat treatment process. The cavity is made of a high-temperature-resistant and corrosion-resistant material, so that the furnace shell 4 can withstand extremely high temperatures without deforming and ensure uniform distribution of the temperature in the furnace. The steel brick 5 is installed in the cavity, and the furnace throat part is protected by using the steel brick 5. The furnace throat part can effectively cope with high temperature, physical impact and chemical corrosion in its working environment by using the steel brick 5. The fixing part 1 can be fixed on the furnace shell 4 by clamping, bolting or other methods. The fixing part 1 can be installed on the furnace shell 4 or extend out of the furnace shell 4 through the furnace shell 4 to fix the fixing part 1 on the furnace body, so that the fixing part 1 extends into the first through hole 53 to block the steel brick 5. The fixing part 1 supports the steel brick 5 by being inserted into the first through hole 53. The length of the fixing part 1 in the first through hole 53 can be different according to the needs. The cross-sectional shape of the first through hole 53 can be circular, square or other shapes. As a specific embodiment of the present embodiment, the diameter of the first through hole 53 is 52 mm. More preferably, the length of the fixing part 1 in the first through hole 53 can be the same as the length of the first through hole 53, so that the fixing part 1 completely covers in the first through hole 53. The fixing part 1 can also completely abut the inner wall of the first through hole 53, thereby better supporting the steel brick 5. The fixing part 1 is inserted into the first through hole 53, so whether the fixing part 1 has threads in the first through hole 53 or not, whether the high temperature in the furnace damages the threads of the fixing part 1 does not affect the supporting effect of the fixing part 1 on the steel brick 5, thereby reducing the possibility of fixing failure or falling of the steel brick 5, and enabling the blast furnace to operate more stably and safely.
[0029] The steel brick 5 is provided with a receiving cavity 52 on one side, and the shielding plate 2 is installed in the receiving cavity 52. Specifically, the receiving cavity 52 is located on the side of the steel brick 5 away from the furnace wall, that is, when the steel brick 5 is installed, the side of the steel brick 5 away from the receiving cavity 52 abuts against the inner wall of the furnace shell 4. The receiving cavity 52 is in communication with the first through hole 53, and the end of the first through hole 53 close to the receiving cavity 52 is located in the receiving cavity 52. The shielding plate 2 is installed in the receiving cavity 52 to block the side of the receiving cavity 52 away from the furnace shell 4, so as to block the heat entering the first through hole 53 through the receiving cavity 52 to raise the temperature in the first through hole 53, thereby reducing the possibility of damage to the fixing part 1 in the first through hole 53 caused by the heat entering the first through hole 53 through the receiving cavity 52, and further protecting the fixing part 1. The melting point of the shielding plate 2 is higher than the melting point of the fixing part 1, so that when the temperature in the furnace shell 4 rises, the fixing part 1 melts later than the shielding plate 2, thereby protecting the fixing part 1. As a specific embodiment of the present embodiment, the thickness of the shielding plate 2 is 10 mm, and the shielding plate 2 is a square plate body. The size of the receiving cavity 52 is 80 mm x 80 mm. Optionally, the fixing part 1 can be made of Inconel 625 alloy, and the shielding plate 2 can be made of 310S stainless steel. The fixing part 1 can be fixed in the receiving cavity 52 by welding, clamping or other means. The size of the receiving cavity 52 is greater than or equal to the size of the steel brick 5, so as to facilitate the installation of the steel brick 5 in the receiving cavity 52. The shielding plate 2 abuts against the fixing part 1 to prevent the fixing part 1 from moving in the axial direction of the first through hole 53 towards the receiving cavity 52. Optionally, the shielding plate 2 can also be installed on the end of the fixing part 1 close to the receiving cavity 52 by welding, integral molding or other means, so as to facilitate the installation of the fixing part 1 and the shielding plate 2. It should be noted that when the shielding plate 2 and the fixing part 1 are connected by welding, integral molding or other means, the fixing part 1 needs to be inserted into the first through hole 53 through the receiving cavity 52. When the shielding plate 2 is inserted into the receiving cavity 52, the shielding plate 2 is fixed in the first through hole 53 by welding or other means.
[0030] Through the above structure, the throat steel brick 5 fixing structure provided by the present invention fixes the steel brick 5. First, the steel brick 5 is laid on the inner wall of the furnace shell 4 so that the side of the steel brick 5 away from the accommodating cavity 52 abuts against the inner wall of the furnace shell 4. Then, one end of the fixing member 1 is passed through the accommodating cavity 52 into the first through hole 53 and is detachably connected to the furnace shell 4 along the first through hole 53, so that the fixing member 1 supports the steel brick 5. Then, the baffle plate 2 is installed in the accommodating cavity 52 so that the baffle plate 2 blocks the accommodating cavity 52. The fixing member 1 abuts against the baffle plate 2 to prevent the fixing member 1 from sliding along the axial direction of the first through hole 53 away from the furnace wall. The melting point of the baffle plate 2 is higher than the melting point of the fixing member 1 so that when the temperature in the furnace shell 4 rises, the fixing member 1 lags behind the baffle plate 2 in melting, thereby protecting the fixing member 1. Therefore, in the fixing structure of the furnace throat steel brick 5, the baffle 2 blocks the heat in the furnace from entering the first through hole 53, reducing the influence of heat on the fixing part 1 and the first through hole 53, and supports the steel brick 5 in the first through hole 53 through the fixing part 1, so that the fixing part 1 is only used to support the steel brick 5 in the first through hole 53. When the temperature in the furnace shell 4 rises, the fixing part 1 lags behind the baffle 2 in melting, thereby protecting the support of the steel brick 5 by the fixing part 1, thereby reducing the possibility of the steel brick 5 failing to be fixed or falling, so that the blast furnace can operate more stably and safely.
[0031] An optional implementation of this embodiment is as follows: the fixing member 1 includes a rod body 11 and a limiting member 12, wherein the rod body 11 is inserted into the first through hole 53, a second through hole 41 is provided on the furnace shell 4, the side of the steel brick 5 away from the accommodating cavity 52 is abutted against the inner wall of the furnace body, and the second through hole 41 of the steel brick 5 is coaxial with the first through hole 53, one end of the rod body 11 passes through the second through hole 41 from the first through hole 53 and extends outside the furnace shell 4; the limiting member 12 is installed on the end of the rod body 11 extending outside the furnace shell 4, and the limiting member 12 is used to prevent the rod body 11 from moving along the second through hole 41 to the direction close to the steel brick 5 The limiting member 12 can be any structural member passed through the rod body 11, specifically, the limiting member 12 can be a nut screwed to the end of the rod body 11 away from the baffle 2, the limiting member 12 can also be a block, the block can be installed in the end of the rod body 11 away from the baffle 2 by means of snap connection or screw connection, the nut or block can be in contact with the furnace shell 4, thereby preventing the rod body 11 from moving in the direction close to the steel brick 5.
[0032] An optional implementation of the embodiment is as follows: in order to better fix the steel brick 5, the furnace throat steel brick 5 fixing structure further comprises a stop block 3, which can be installed on the end of the rod body 11 away from the limiting piece 12 by welding or one-piece forming, etc., the stop block 3 is located in the accommodating cavity 52 and between the rod body 11 and the shielding plate 2, the stop block 3 abuts against the cavity wall of the accommodating cavity 52, thereby blocking the movement of the steel brick 5 along the shaft pin of the rod body 11 in the direction away from the furnace wall, specifically, the rod body 11 is inserted into the first through hole 53 and extends out of the furnace shell 4 from the second through hole 41, one side of the steel brick 5 abuts against the inner wall of the furnace shell 4, and the other side of the accommodating cavity 52 abuts against the stop block 3, one end of the limiting piece 12 abuts against the outer wall of the furnace shell 4, so as to clamp the steel brick 5 between the furnace wall and the stop block 3, through the above structure, the steel brick 5 and the rod body 11 cannot move in the radial direction and the axial direction of the first rod body 11, so as to stably fix the steel brick 5, therefore, the fixing piece 1 fixes the steel brick 5 through the shielding plate 2 and the limiting piece 12, in this way, the rod body 11 can better support the steel brick 5, the steel brick 5 can be better fixed on the inner wall of the furnace shell 4, the possibility of shaking of the steel brick 5 is reduced, and the possibility of fixing failure or falling of the steel brick 5 is reduced, so that the blast furnace can operate more stably and safely.
[0033] An optional implementation of the embodiment is as follows: the limiting piece 12 is a nut, the end of the rod body 11 away from the accommodating cavity 52 is provided with a thread matched with the nut, and the pre-tightening force is applied by tightening the nut to fix the rod body 11 on the furnace shell 4, as a specific implementation of the embodiment, the rod body 11 is an M48 screw rod.
[0034] An optional implementation of the embodiment is as follows: the steel brick 5 is provided with a protrusion 51, and a through hole is formed in the protrusion 51, the protrusion 51 can extend the length of the first through hole 53, so as to make the contact area of the rod body 11 and the steel brick 5 larger, and further better support the steel brick 5, in the embodiment, the protrusion 51 is arranged on the side of the steel brick 5 away from the accommodating cavity 52, and the side of the protrusion 51 away from the accommodating cavity 52 abuts against the inner wall of the furnace body.
[0035] An optional implementation of the embodiment is as follows: the cross section of the accommodating cavity 52 is square, and correspondingly, the shape of the stop block 3 corresponds to the accommodating cavity 52, the side wall of the stop block 3 abuts against the inner wall of the accommodating cavity 52, so as to block the rotation of the rod body 11 in the axial direction of the first through hole 53, thereby making it more convenient to fix the limiting piece 12.
[0036] An optional implementation of the embodiment is as follows: the number of the first through holes 53 is multiple, the accommodating cavities 52, the shielding plates 2, the fixing members 1 and the limiting members 12 all correspond to the first through holes 53 one by one, one fixing member 1 is installed in each first through hole 53 to fix the steel bricks 5, the steel bricks 5 are supported by the multiple fixing members 1, so that each rod body 11 can share and balance the load received by itself, the stress received by each rod body 11 is more uniform, the risk of damage of the rod body 11 caused by overload when a single rod body 11 supports is reduced, the possibility of fixation failure or falling of the steel bricks 5 is reduced, and the blast furnace can operate more stably and safely.
[0037] In summary, when the furnace throat steel brick 5 fixing structure fixes the steel bricks 5, first, the steel bricks 5 are laid on the inner wall of the furnace shell 4, the side of the steel bricks 5 away from the accommodating cavities 52 abuts against the inner wall of the furnace shell 4, then one end of the rod body 11 is arranged in the first through hole 53 from the accommodating cavity 52 and extends out of the furnace shell 4 along the second through hole 41, so as to support the steel bricks 5, the stop block 3 abuts against the cavity wall of the accommodating cavity 52, the limiting member 12 is installed on the end of the rod body 11 extending out of the furnace shell 4, one side of the limiting member 12 abuts against the furnace shell 4, the steel bricks 5 and the rod body 11 cannot move along the radial direction and the axial direction of the first rod body 11, so as to fix the steel bricks 5 stably, the shielding plate 2 is installed in the accommodating cavity 52, the shielding plate 2 blocks the accommodating cavity 52, the fixing member 1 abuts against the shielding plate 2, so as to block the fixing member 1 from sliding in the axial direction of the first through hole 53 away from the furnace wall, the steel bricks 5 are supported by the multiple fixing members 1, so that each rod body 11 can share and balance the load received by itself, the stress received by each rod body 11 is more uniform, the risk of damage of the rod body 11 caused by overload when a single rod body 11 supports is reduced, and the possibility of fixation failure or falling of the steel bricks 5 is reduced. Therefore, in the furnace throat steel brick 5 fixing structure, the shielding plate 2 blocks the heat in the furnace from entering the first through hole 53, the influence of the heat on the fixing member 1 and the first through hole 53 is reduced, the fixing member 1 supports the steel bricks 5 in the first through hole 53, the fixing member 1 is only used for supporting the steel bricks 5 in the first through hole 53, when the temperature in the furnace shell 4 rises, the fixing member 1 melts later than the shielding plate 2, so as to protect the support of the fixing member 1 on the steel bricks 5, the possibility of fixation failure or falling of the steel bricks 5 is reduced, and the blast furnace can operate more stably and safely.
[0038] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. The throat steel brick fixing structure is characterized by: include: A fixing piece, wherein the steel brick has a first through hole, and one end of the fixing piece passes through the first through hole and is detachably connected to the furnace shell; A baffle plate is provided on the side of the steel brick away from the furnace shell, the accommodating cavity is connected to the first through hole, and the baffle plate is installed in the accommodating cavity to block the side of the accommodating cavity away from the furnace shell. The melting point of the baffle plate is higher than the melting point of the fixing part.
2. The throat steel brick fixing structure according to claim 1, characterized in that: The fixing member includes: a rod body inserted into the first through hole, the furnace shell having a second through hole, the rod body passing through the second through hole and extending out of the furnace shell; A limiter is installed on one end of the rod away from the shielding plate, and the limiter abuts against the side of the furnace shell away from the steel brick to prevent the rod from moving along the axial direction of the second through hole toward the steel brick.
3. The throat steel brick fixing structure according to claim 2, characterized in that: Also includes: A stopper is installed at one end of the rod body away from the limiting member and is located in the accommodating cavity. The stopper abuts against the cavity wall of the accommodating cavity to prevent the steel brick from moving in the direction away from the furnace wall along the axial direction of the rod body.
4. The throat steel brick fixing structure according to claim 2, characterized in that: The limiting member is a nut.
5. The throat steel brick fixing structure according to claim 1, characterized in that: The steel brick is provided with a protrusion, and the through hole is opened on the protrusion.
6. The throat steel brick fixing structure according to claim 1, characterized in that: The cross section of the accommodating cavity is square, and the shielding plate is adapted to the accommodating cavity.
7. The throat steel brick fixing structure according to claim 2, characterized in that: There are multiple first through holes, and the accommodating cavity, the shielding plate, the fixing member, and the limiting member correspond to the first through holes in a one-to-one manner.