Roasting furnace

Abstract

The utility model discloses a calcination furnace includes: furnace shell, distribution board, distribution board is located in the furnace shell, the thickness direction of distribution board is up and down direction, and the outer peripheral surface of distribution board is spaced apart with the inner wall surface of furnace shell, and the thickness direction of the tray is up and down direction, and the tray is located distribution board's top, and the tray is equipped on the inner wall surface of furnace shell, and the distribution board and the tray top are equipped with refractory, and the sealing board is annular, and the sealing board includes first annular brim and second annular brim, and first annular brim is connected with distribution board, and second annular brim is connected with at least one of tray and the inner wall surface of furnace shell. Therefore, according to the calcination furnace of the utility model has the advantages of long service life and low use risk.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical technology, specifically to a roasting furnace. Background Technology

[0002] There is a gap between the outer ring of the distribution plate at the bottom of the roasting furnace and the furnace shell. In related technologies, refractory material is used to fill this gap. When the furnace bottom blasting system is activated and the high-pressure airflow flows directionally within the furnace bottom space, this gap becomes a bypass path for the airflow, causing significant air leakage. This leaked airflow acts on the refractory area between the support plate and the distribution plate in the form of high-speed jets. Over time, the refractory material is subjected to the erosion and scouring of high-speed airflow, gradually weakening the adhesion between particles and eventually blowing out larger gaps. This situation has two significant negative impacts on the stable operation of the roasting furnace: Firstly, the originally designed uniform boiling conditions within the furnace are disrupted, interfering with the contact, mixing, and reaction processes between the material and the hot airflow, reducing roasting efficiency and product quality consistency; secondly, the internal structure of the refractory material is damaged by the airflow erosion, increasing its porosity and loosening its microstructure, leading to reduced refractory strength, shortened service life, increased equipment maintenance costs, and the risk of unplanned shutdowns. Utility Model Content

[0003] The present invention aims to at least partially solve one of the technical problems in the related art. To this end, embodiments of the present invention provide a roasting furnace.

[0004] The roasting furnace of this utility model embodiment includes:

[0005] Furnace shell;

[0006] A distribution plate is located inside the furnace shell, the thickness direction of the distribution plate is vertical, and the outer peripheral surface of the distribution plate is spaced apart from the inner wall surface of the furnace shell.

[0007] The pallet is annular, with its thickness direction being vertical. The pallet is located above the distribution plate and is disposed on the inner wall surface of the furnace shell. Refractory material is provided above the distribution plate and the pallet.

[0008] The sealing plate is annular, and includes a first annular edge and a second annular edge. The first annular edge is connected to the distribution plate, and the second annular edge is connected to at least one of the support plate and the inner wall surface of the furnace shell.

[0009] Therefore, the roasting furnace according to the embodiments of this utility model has the advantages of long service life and low risk of use.

[0010] In some embodiments, the first annular edge is located below the second annular edge, the first annular edge is connected to the upper surface of the distribution plate, and the second annular edge is connected to the tray.

[0011] In some embodiments, the outer edge of the distribution plate is connected to the inner wall surface of the furnace shell, and the second annular edge is adjacent to the inner edge of the distribution plate in the inward and outward directions.

[0012] In some embodiments, the sealing plate has a first surface and a second surface disposed opposite to each other, both the first surface and the second surface being annular, the first surface facing the furnace shell and being concave, and the second surface facing the refractory material on the distribution plate and being convex.

[0013] In some embodiments, the thickness of the sealing plate is greater than or equal to 4 mm and less than or equal to 6 mm.

[0014] In some embodiments, the sealing plate is a steel plate, and the sealing plate is welded to the distribution plate and the support plate.

[0015] In some embodiments, the axial direction of the sealing plate is vertical, and the first annular edge is located directly below the second annular edge.

[0016] In some embodiments, there are multiple sealing plates, which are spaced apart in the inward and outward directions.

[0017] In some embodiments, an annular cover plate is provided on the inner wall surface of the furnace shell, the cover plate is located below the support plate, and the lower surface of the cover plate abuts against the upper surface of the outer edge of the distribution plate.

[0018] In some embodiments, the furnace shell is provided with a support member and a support plate, both of which are used to support the distribution plate. The support plate is annular, and its thickness direction is vertical. The outer edge of the support plate is connected to the inner wall of the furnace shell, and the upper surface of the support plate abuts against the lower surface of the distribution plate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a roasting furnace according to an embodiment of the present utility model.

[0020] Figure 2 This is a schematic diagram of the furnace bottom of the roasting furnace according to an embodiment of the present utility model.

[0021] Figure 3 This is a schematic diagram of a sealing plate according to an embodiment of the present utility model.

[0022] Reference numerals: 1. Furnace shell, 2. Distribution plate, 3. Support plate, 4. Refractory material, 5. Sealing plate, 6. First annular edge, 7. Second annular edge, 8. Cover plate, 9. Support member, 10. Support plate. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] The roasting furnace of this utility model is described below with reference to the accompanying drawings. Figures 1 to 3 As shown, the roasting furnace according to an embodiment of the present invention includes a furnace shell 1, a distribution plate 2, a support plate 3, and a sealing plate 5. Specifically, the bottom of the furnace shell 1 is provided with a foundation and a bellows. The foundation is used to support the furnace shell 1, and the bellows is used to introduce gas into the furnace chamber of the roasting furnace.

[0025] The distribution plate 2 is located inside the furnace shell 1. The thickness direction of the distribution plate 2 is vertical, and the outer peripheral surface of the distribution plate 2 is spaced apart from the inner wall surface of the furnace shell 1. The distribution plate 2 is used to evenly distribute the gas introduced into the furnace chamber of the roasting furnace. After the distribution plate 2 is placed inside the furnace shell 1, there is a gap between the distribution plate 2 and the furnace shell 1 in the inner and outer directions. This gap is annular.

[0026] Specifically, the distribution plate 2 is located at the lower part of the furnace shell 1. The furnace shell 1 contains a support member 9 and a support plate 10, both used to support the distribution plate 2. The support plate 10 is annular, with its thickness directed vertically. The outer edge of the support plate 10 is connected to the inner wall of the furnace shell 1, and the upper surface of the support plate 10 abuts against the lower surface of the distribution plate 2, thus allowing the support plate 10 to support the outer edge of the distribution plate 2. For example, the support member 9 can be an I-beam, and the outer perimeter of the distribution plate 2 can be circular.

[0027] The support plate 3 is annular, with its thickness extending vertically. It is positioned above the distribution plate 2 and rests on the inner wall of the furnace shell 1. Specifically, the support plate 3 is a circular plate, and refractory material 4 is provided above the distribution plate 2 and the support plate 3. The refractory material 4 comprises a first part and a second part. The first part of the refractory material 4 is located on the distribution plate 2 and around the vent cap of the distribution plate 2. The second part of the refractory material 4 is located on the support plate 3 so that the support plate can support the second part of the refractory material 4. The second part of the refractory material 4 is situated on the inner wall of the furnace shell 1, and the first and second parts of the refractory material 4 define the furnace chamber of the roasting furnace.

[0028] The sealing plate 5 is annular, comprising a first annular edge 6 and a second annular edge 7. The first annular edge 6 is connected to the distribution plate 2, and the second annular edge 7 is connected to at least one of the support plate 3 and the inner wall surface of the furnace shell 1. Specifically, the sealing plate 5 is an annular plate body, connected to the distribution plate 2, and connected to one of the support plate 3 and the furnace shell 1. This allows one side of the sealing plate 5 to contact the (first part) refractory material 4, blocking air leakage at the gap between the distribution plate 2 and the furnace shell 1, thus preventing leaked air from blowing onto the refractory material 4. In other words, the sealing plate 5 can circumferentially cover the gap between the distribution plate 2 and the furnace shell 1, thereby preventing air leakage into the refractory material 4. This improves the service life of the refractory material 4 and the calcining furnace, and reduces the operational risks of the calcining furnace.

[0029] Therefore, the roasting furnace according to the embodiments of this utility model has the advantages of long service life and low risk of use.

[0030] In some embodiments, the first annular edge 6 is located below the second annular edge 7, the first annular edge 6 is connected to the upper surface of the distribution plate 2, and the second annular edge 7 is connected to the support plate 3. That is, a sealing plate 5 is provided between the distribution plate 2 and the support plate 3, and the two annular edges of the sealing plate 5 (the first annular edge 6 and the second annular edge 7) are connected to the distribution plate 2 and the support plate 3 respectively, so that the distribution plate 2, the sealing plate 5, and the support plate 3 cooperate to form an annular sealed cavity. This allows the sealing plate 5 to have ample space for welding, better ensuring the strength of the weld and preventing air leakage. During furnace shutdown and maintenance, this structure provides greater operational space and simplifies disassembly.

[0031] In some embodiments, the outer edge of the distribution plate 2 is connected to the inner wall surface of the furnace shell 1, and the second annular edge 7 is adjacent to the inner edge of the distribution plate 2 in the inward and outward direction. Specifically, the sealing plate 5 is adjacent to the inner edge of the distribution plate 2 in the inward and outward direction, which facilitates the installation of the sealing plate 5 by the operator and also increases the space formed between the distribution plate 2, the sealing plate 5, the support plate 3 and the furnace shell 1, thereby reducing the use of refractory material 4.

[0032] In some embodiments, the sealing plate 5 has a first surface and a second surface arranged opposite to each other. Both the first and second surfaces are annular. The first surface faces the furnace shell 1 and is concave, while the second surface faces the refractory material 4 on the distribution plate 2 and is convex. That is, the sealing plate 5 is an arc-shaped surface extending circumferentially, with its protruding side facing the refractory material 4, thereby further reducing the amount of refractory material 4 used and increasing the structural strength of the sealing plate 5.

[0033] In some embodiments, the thickness of the sealing plate 5 is greater than or equal to 4 mm and less than or equal to 6 mm. Specifically, the sealing plate 5 is a steel plate, and it is welded to the distribution plate 2 and the support plate 3. The welding position of the sealing plate 5 to the distribution plate 2 and the support plate 3 is located on the inner side of the sealing plate 5 (the side facing away from the furnace shell 1). The thickness of the sealing plate 5 can be controlled (greater than or equal to 4 mm and less than or equal to 6 mm) so that the sealing plate 5 becomes a flexible steel plate. Flexible steel plates have better ductility and can alleviate thermal and mechanical stresses through their own deformation.

[0034] In some embodiments, the axial direction of the sealing plate 5 is vertical, and the first annular edge 6 is located directly below the second annular edge 7. That is, the thickness direction of the sealing plate 5 is (generally) inward and outward, and the annular edges at the upper and lower ends of the sealing plate 5 coincide in the horizontal position.

[0035] In some embodiments, there are multiple sealing plates 5, which are spaced apart in the inward and outward directions. The multiple sealing plates 5 ensure that if one sealing plate 5 is damaged, the others can still provide a seal. For example, two sealing plates 5 can be provided, both adjacent to the inner edge of the support plate 3.

[0036] In some embodiments, an annular cover plate 8 is provided on the inner wall surface of the furnace shell 1. The cover plate 8 is located below the support plate 3, and the lower surface of the cover plate 8 abuts against the upper surface of the outer edge of the distribution plate 2. Specifically, the cover plate 8 is welded to the inner surface (inner sidewall) of the furnace shell. The cover plate 8 can seal the gap between the distribution plate 2 and the furnace shell 1, thereby reducing air leakage.

[0037] The sealing plate needs to be fully welded to the distribution plate 2 and the furnace shell 1 to create a tight seal and effectively prevent gas leakage. However, the construction environment in this area is extremely harsh, with a narrow and confined space, limiting the welder's operating space and making it difficult to use welding equipment. As a result, it is difficult for workers to strictly follow welding process standards to ensure the continuity, density, and strength of the weld. Furthermore, the sealing plate will cause numerous problems during subsequent furnace shutdown maintenance. The full welding connection binds the sealing steel plate to the distribution plate 2 and the furnace shell 1 as a single unit. When disassembling related components for maintenance, a significant amount of manpower and resources are required to separate them using cutting methods within a very small operating space. This not only increases the workload and time cost of maintenance but may also damage the distribution plate 2 and the furnace shell 1 base material due to improper cutting operations, affecting the overall structural strength and service life of the equipment and causing significant difficulties for maintenance work.

[0038] According to this embodiment of the calcining furnace, a ring-shaped sealing plate 5 is circumferentially welded between the support plate 3 and the distribution plate 2, firmly connecting a ring of flexible sealing plates 5. This layout creates more ample working space for welders, allowing them to perform welding operations more flexibly, strictly follow welding process specifications, and precisely control welding parameters, thereby ensuring the continuity, density, and strength of the weld, effectively avoiding welding defects caused by limited space, and eliminating air leakage.

[0039] By controlling the thickness of the sealing plate 5, it is made of flexible steel, giving it a certain degree of ductility and mobility, enabling it to respond well to the complex and changing working conditions inside the furnace. Under conditions of temperature fluctuations and pressure changes inside the furnace, the sealing plate 5 can alleviate thermal and mechanical stresses through its own deformation, maintaining structural stability. Compared with rigid connection structures, it can better adapt to the harsh environment inside the furnace and reduce the risk of structural damage.

[0040] This layout eliminates the need for refractory material (4) filling the lower part of the support plate 3, reducing the amount of refractory material used. This not only lowers material costs but also reduces the overall weight of the furnace body, facilitating optimized furnace structural design, reducing foundation load pressure, and minimizing maintenance needs caused by refractory aging and cracking. During subsequent shutdown and maintenance, the roasting furnace according to this embodiment offers ample operating space, making dismantling easier, significantly shortening maintenance time, reducing the impact of maintenance on production, and improving overall equipment operation and maintenance efficiency.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A calcining furnace characterized by, include: Furnace shell; A distribution plate is located inside the furnace shell, the thickness direction of the distribution plate is vertical, and the outer peripheral surface of the distribution plate is spaced apart from the inner wall surface of the furnace shell. The pallet is annular, with its thickness direction being vertical. The pallet is located above the distribution plate and is disposed on the inner wall surface of the furnace shell. Refractory material is provided above the distribution plate and the pallet. The sealing plate is annular, and includes a first annular edge and a second annular edge. The first annular edge is connected to the distribution plate, and the second annular edge is connected to at least one of the support plate and the inner wall surface of the furnace shell.

2. The calciner according to claim 1, characterized in that The first annular edge is located below the second annular edge, the first annular edge is connected to the upper surface of the distribution plate, and the second annular edge is connected to the tray.

3. The calciner according to claim 2, characterized in that The outer edge of the distribution plate is connected to the inner wall of the furnace shell, and the second annular edge is adjacent to the inner edge of the distribution plate in the inward and outward directions.

4. The calciner of claim 2, wherein The sealing plate has a first surface and a second surface arranged opposite to each other. Both the first surface and the second surface are annular. The first surface faces the furnace shell and is concave. The second surface faces the refractory material on the distribution plate and is convex.

5. The calciner of claim 2, wherein The thickness of the sealing plate is greater than or equal to 4 mm and less than or equal to 6 mm.

6. The calciner according to claim 5, characterized in that The sealing plate is made of steel plate, and the sealing plate is welded to the distribution plate and the support plate.

7. The calciner of claim 2, wherein The sealing plate is oriented vertically, and the first annular edge is located directly below the second annular edge.

8. The roasting furnace according to claim 3, characterized in that, There are multiple sealing plates, which are spaced apart in the inward and outward directions.

9. The roasting furnace according to any one of claims 1-8, characterized in that, The inner wall of the furnace shell is provided with an annular cover plate, which is located below the support plate, and the lower surface of the cover plate abuts against the upper surface of the outer edge of the distribution plate.

10. The roasting furnace according to claim 9, characterized in that, The furnace shell is provided with a support member and a support plate. Both the support member and the support plate are used to support the distribution plate. The support plate is annular and its thickness direction is vertical. The outer edge of the support plate is connected to the inner wall of the furnace shell, and the upper surface of the support plate abuts against the lower surface of the distribution plate.

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