Anti-erosion blast furnace bottom structure
By laying a multi-layer structure of ceramic layers, carbon brick layers and refractory brick layers on the bottom and wall of the blast furnace, the blast furnace is vulnerable to erosion and damage in high-temperature environments, and effective protection against thermal stress and chemical erosion is achieved , extends the service life of the blast furnace.
Patent Information
- Application Number
- CN202421278677.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-06
AI Technical Summary
The bottom and wall of the blast furnace are susceptible to erosion and damage in high temperature environments, resulting in a shortening of the blast furnace life. The prior art is difficult to effectively prevent deformation or rupture caused by thermal stress.
Multi-layer structures are laid on the bottom and wall of the furnace, including ceramic layers, carbon brick layers and refractory brick layers, forming multi-layer protective structures to reduce the impact of thermal stress and chemical erosion.
Through the multi-layer structure design, the risk of deformation and fracture of the furnace bottom and furnace wall due to thermal stress and chemical erosion at high temperatures is significantly reduced, and the service life of the blast furnace is extended.
Smart Images
Figure CN222499195U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of furnace bottom structures, in particular to an anti-corrosion blast furnace bottom structure. Background Art
[0002] In the modern steel production process, blast furnace ironmaking output accounts for more than 90% of the total iron production. With the development trend of large-scale blast furnaces, the integration and complexity of blast furnace systems are increasing, and the number is decreasing, resulting in large investment and long construction period for blast furnace overhaul and huge impact on the entire steel production process. Therefore, the longevity of blast furnaces has become the focus of attention of the majority of ironmaking workers. Achieving blast furnace longevity is also the only way for steel companies to achieve sustainable development. The working environment of the blast furnace bottom and hearth determines that the lining of the bottom and hearth is susceptible to erosion and damage, mainly including the flow scouring of high-temperature liquid slag, chemical erosion, thermal stress shock and damage by harmful elements. The degree and speed of erosion of the bottom and hearth often determine the service life of a generation of blast furnaces. Among them, unreasonable bottom and hearth structure design and brick lining selection will cause abnormal erosion of the bottom and hearth too early and too fast, endangering the life of the blast furnace. Therefore, an anti-erosion blast furnace bottom structure is needed to enhance the service life of the blast furnace. Utility Model Content
[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a corrosion-resistant blast furnace bottom structure. By laying a ceramic layer, a carbon brick layer, and a refractory brick layer on the furnace bottom to form a group, and the furnace bottom is composed of two groups, the risk of deformation or cracking due to thermal stress during the operation of the furnace can be reduced, which is beneficial to ensuring the safe and stable operation of the furnace. By laying a refractory concrete layer, a refractory brick layer, and a carbon brick layer on the furnace wall to form a group, and the furnace wall is composed of two groups, the risk of deformation and cracking of the furnace wall at high temperature can be reduced, which is beneficial to ensuring the long-term stable operation of the furnace.
[0004] The utility model also provides the above-mentioned corrosion-resistant blast furnace bottom structure, comprising: a bottom shell, the lower bottom wall of the bottom shell is fixedly connected with a second bottom refractory brick layer, the upper surface of the second bottom refractory brick layer is provided with a second bottom carbon brick layer, the upper surface of the second bottom carbon brick layer is provided with a second bottom ceramic layer, the upper surface of the second bottom ceramic layer is provided with a first bottom refractory brick layer, the upper surface of the first bottom refractory brick layer is provided with a first bottom carbon brick layer, the upper surface of the first bottom carbon brick layer is provided with a first bottom ceramic layer; a second furnace wall carbon brick layer, the second furnace wall carbon brick layer The side inner wall of the layer is provided with a second furnace wall refractory brick layer, the side inner wall of the second furnace wall refractory brick layer is provided with a second furnace wall refractory concrete layer, the side inner wall of the second furnace wall refractory concrete layer is provided with a first furnace wall carbon brick layer, the side inner wall of the first furnace wall carbon brick layer is provided with a first furnace wall refractory brick layer, and the side inner wall of the first furnace wall refractory brick layer is provided with a first furnace wall refractory concrete layer. Through the above devices, the risk of deformation or cracking caused by thermal stress during operation of the furnace can be reduced, and the risk of deformation and cracking of the furnace wall at high temperature can be reduced, which is beneficial to ensure the long-term stable operation of the furnace.
[0005] According to the corrosion-resistant blast furnace bottom structure described in the utility model, the second furnace wall carbon brick layer is fixedly connected to the side inner wall of the bottom shell, and the second furnace wall carbon brick layer, the second furnace wall refractory brick layer and the second furnace wall refractory concrete layer are all located on the upper surface of the second furnace bottom ceramic layer. The above devices are beneficial to reducing the deformation or cracking of the furnace body caused by thermal stress.
[0006] According to the corrosion-resistant blast furnace bottom structure described in the utility model, the first bottom carbon brick layer, the second bottom carbon brick layer, the first furnace wall carbon brick layer and the second furnace wall carbon brick layer are all composed of carbon bricks. The above devices are beneficial to maintaining the stability of the furnace body structure and preventing damage caused by overheating.
[0007] According to the corrosion-resistant blast furnace bottom structure described in the utility model, the first furnace bottom refractory brick layer, the second furnace bottom refractory brick layer, the first furnace wall refractory brick layer and the second furnace wall refractory brick layer are all composed of refractory bricks. The above devices are helpful to ensure that the furnace bottom and furnace wall maintain stability and integrity in a high temperature environment.
[0008] According to the corrosion-resistant blast furnace bottom structure described in the utility model, the first furnace wall refractory concrete layer and the second furnace wall refractory concrete layer are both composed of special concrete, and the first furnace bottom ceramic layer and the second furnace bottom ceramic layer are both composed of ceramic pads. Through the above devices, the furnace wall and furnace bottom are beneficial to have higher high temperature resistance, chemical corrosion resistance, heat insulation and wear resistance.
[0009] According to the corrosion-resistant blast furnace bottom structure described in the utility model, the first furnace wall carbon brick layer, the first furnace wall refractory brick layer and the first furnace wall refractory concrete layer are all located on the upper surface of the first furnace bottom ceramic layer. The above devices are helpful to ensure that the furnace wall can still maintain structural stability and integrity under high temperature and high pressure environment.
[0010] Beneficial Effects
[0011] 1. Compared with the prior art, the corrosion-resistant blast furnace bottom structure, by laying a ceramic layer, a carbon brick layer, and a refractory brick layer on the furnace bottom to form a group, and the furnace bottom is composed of two groups, which can reduce the risk of deformation or cracking caused by thermal stress during the operation of the furnace, and is beneficial to ensure the safe and stable operation of the furnace.
[0012] 2. Compared with the prior art, the corrosion-resistant blast furnace bottom structure is formed by laying a group of refractory concrete layer, refractory brick layer and carbon brick layer on the furnace wall, and the furnace wall is composed of two groups, which can reduce the risk of deformation and cracking of the furnace wall at high temperature, and is beneficial to ensure the long-term stable operation of the furnace. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments;
[0014] Figure 1 It is a three-dimensional structural diagram of the corrosion-resistant blast furnace bottom structure of the utility model;
[0015] Figure 2 This is a cross-sectional structural diagram of the corrosion-resistant blast furnace bottom structure of the utility model;
[0016] Figure 3 This is an internal structural diagram of the corrosion-resistant blast furnace bottom structure of the utility model.
[0017] Legend:
[0018] 1. Bottom shell; 2. Second furnace wall carbon brick layer; 3. Second furnace wall refractory brick layer; 4. Second furnace wall refractory concrete layer; 5. First furnace wall carbon brick layer; 6. First furnace wall refractory brick layer; 7. First furnace wall refractory concrete layer; 8. First furnace bottom ceramic layer; 9. First furnace bottom carbon brick layer; 10. First furnace bottom refractory brick layer; 11. Second furnace bottom ceramic layer; 12. Second furnace bottom carbon brick layer; 13. Second furnace bottom refractory brick layer. DETAILED DESCRIPTION
[0019] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.
[0020] Reference Figure 1-3 The utility model embodiment of an anti-corrosion blast furnace bottom structure includes: a bottom shell 1, which serves as the foundation and support of the entire bottom structure; a second bottom refractory brick layer 13 is fixedly connected to the lower bottom wall of the bottom shell 1, which is used to provide basic refractory performance and prevent high temperature from directly corroding the bottom shell 1; a second bottom carbon brick layer 12 is arranged on the upper surface of the second bottom refractory brick layer 13, which further provides thermal stability and structural support; a second bottom ceramic layer 11 is arranged on the upper surface of the second bottom carbon brick layer 12, which serves as an insulation layer to reduce heat transfer downward and provide additional chemical stability; a first bottom refractory brick layer 10 is arranged on the upper surface of the second bottom ceramic layer 11, which provides additional refractory protection and ensures the integrity and safety of the bottom structure; a first bottom carbon brick layer 9 is arranged on the upper surface of the first bottom refractory brick layer 10, which provides thermal stability and structural support; a first bottom ceramic layer 8 is arranged on the upper surface of the first bottom carbon brick layer 9, which serves as a top insulation layer to reduce heat transfer upward and protect the internal structure.
[0021] The second furnace wall carbon brick layer 2 provides basic thermal stability and structural support for the furnace wall. The second furnace wall carbon brick layer 2 is fixedly connected to the side inner wall of the bottom shell 1. The side inner wall of the second furnace wall carbon brick layer 2 is provided with a second furnace wall refractory brick layer 3 to enhance the fire resistance of the furnace wall and prevent high temperature and corrosive substances from damaging the furnace wall. The side inner wall of the second furnace wall refractory brick layer 3 is provided with a second furnace wall refractory concrete layer 4 to provide additional fire protection and chemical stability to prevent the furnace wall from being eroded. The second furnace wall carbon brick layer 2 and the second furnace wall The refractory brick layer 3 and the second furnace wall refractory concrete layer 4 are both located on the upper surface of the second furnace bottom ceramic layer 11; the side inner wall of the second furnace wall refractory concrete layer 4 is provided with a first furnace wall carbon brick layer 5; the side inner wall of the first furnace wall carbon brick layer 5 is provided with a first furnace wall refractory brick layer 6 to enhance the refractory properties of the furnace wall and prevent damage to the furnace wall by high temperature and corrosive substances; the side inner wall of the first furnace wall refractory brick layer 6 is provided with a first furnace wall refractory concrete layer 7 to provide additional refractory protection and chemical stability to prevent erosion of the furnace wall.
[0022] The first furnace wall carbon brick layer 5, the first furnace wall refractory brick layer 6, and the first furnace wall refractory concrete layer 7 are all located on the upper surface of the first furnace bottom ceramic layer 8, the first furnace bottom carbon brick layer 9, the second furnace bottom carbon brick layer 12, the first furnace wall carbon brick layer 5, and the second furnace wall carbon brick layer 2 are all composed of carbon bricks, the first furnace bottom refractory brick layer 10, the second furnace bottom refractory brick layer 13, the first furnace wall refractory brick layer 6, and the second furnace wall refractory brick layer 3 are all composed of refractory bricks, the first furnace wall refractory concrete layer 7 and the second furnace wall refractory concrete layer 4 are both composed of special concrete, and the first furnace bottom ceramic layer 8 and the second furnace bottom ceramic layer 11 are both composed of ceramic pads.
[0023] Working principle: Carbon brick layer (first furnace bottom carbon brick layer 9, second furnace bottom carbon brick layer 12, first furnace wall carbon brick layer 5, second furnace wall carbon brick layer 2): Carbon bricks have good thermal conductivity and thermal stability, and can quickly transfer heat to the cooling system, thereby protecting the furnace wall and furnace bottom from high temperature erosion. Refractory brick layer (first furnace bottom refractory brick layer 10, second furnace bottom refractory brick layer 13, first furnace wall refractory brick layer 6, second furnace wall refractory brick layer 3): Refractory bricks have excellent fire resistance and corrosion resistance, and can remain stable for a long time in high temperature and corrosive environments. Ceramic layer (first furnace bottom refractory brick layer 10, second furnace bottom refractory brick layer 13, first furnace wall refractory brick layer 6, second furnace wall refractory brick layer 3): Refractory bricks have excellent fire resistance and corrosion resistance, and can remain stable for a long time in high temperature and corrosive environments. Ceramic layer 8 and the second furnace bottom ceramic layer 11): The ceramic layer has good thermal insulation and chemical stability, which can prevent high temperature and corrosive substances from directly corroding the inner layer material. Refractory concrete layer (the first furnace wall refractory concrete layer 7 and the second furnace wall refractory concrete layer 4): Special concrete has excellent high temperature resistance and wear resistance, which can protect the furnace wall and furnace bottom from mechanical and chemical corrosion. The multi-layer structure ensures that heat and corrosive substances are consumed and weakened by multiple protective layers before they are transferred to the core part of the furnace bottom or furnace wall, thereby greatly extending the service life of the blast furnace.
[0024] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.
Claims
1. A corrosion-resistant blast furnace bottom structure, characterized in that: include: A bottom shell (1), wherein a second furnace bottom refractory brick layer (13) is fixedly connected to the lower bottom wall of the bottom shell (1), a second furnace bottom carbon brick layer (12) is arranged on the upper surface of the second furnace bottom refractory brick layer (13), a second furnace bottom ceramic layer (11) is arranged on the upper surface of the second furnace bottom carbon brick layer (12), a first furnace bottom refractory brick layer (10) is arranged on the upper surface of the second furnace bottom ceramic layer (11), a first furnace bottom carbon brick layer (9) is arranged on the upper surface of the first furnace bottom refractory brick layer (10), and a first furnace bottom ceramic layer (8) is arranged on the upper surface of the first furnace bottom carbon brick layer (9); A second furnace wall carbon brick layer (2), the second furnace wall carbon brick layer (2) is provided with a second furnace wall refractory brick layer (3) on its side inner wall, the second furnace wall refractory brick layer (3) is provided with a second furnace wall refractory concrete layer (4) on its side inner wall, the second furnace wall refractory concrete layer (4) is provided with a first furnace wall carbon brick layer (5) on its side inner wall, the first furnace wall carbon brick layer (5) is provided with a first furnace wall refractory brick layer (6) on its side inner wall, and the first furnace wall refractory brick layer (6) is provided with a first furnace wall refractory concrete layer (7) on its side inner wall.
2. The corrosion-resistant blast furnace bottom structure according to claim 1, characterized in that: The second furnace wall carbon brick layer (2) is fixedly connected to the side inner wall of the bottom shell (1), and the second furnace wall carbon brick layer (2), the second furnace wall refractory brick layer (3), and the second furnace wall refractory concrete layer (4) are all located on the upper surface of the second furnace bottom ceramic layer (11).
3. The corrosion-resistant blast furnace bottom structure according to claim 1, characterized in that: The first furnace bottom carbon brick layer (9), the second furnace bottom carbon brick layer (12), the first furnace wall carbon brick layer (5), and the second furnace wall carbon brick layer (2) are all formed by laying carbon bricks.
4. The corrosion-resistant blast furnace bottom structure according to claim 1, characterized in that: The first furnace bottom refractory brick layer (10), the second furnace bottom refractory brick layer (13), the first furnace wall refractory brick layer (6), and the second furnace wall refractory brick layer (3) are all formed by laying refractory bricks.
5. The corrosion-resistant blast furnace bottom structure according to claim 1, characterized in that: The first furnace wall refractory concrete layer (7) and the second furnace wall refractory concrete layer (4) are both made of special concrete, and the first furnace bottom ceramic layer (8) and the second furnace bottom ceramic layer (11) are both made of ceramic pads.
6. The corrosion-resistant blast furnace bottom structure according to claim 1, characterized in that: The first furnace wall carbon brick layer (5), the first furnace wall refractory brick layer (6), and the first furnace wall refractory concrete layer (7) are all located on the upper surface of the first furnace bottom ceramic layer (8).