A method for treating a blast furnace tuyere coal gas leak

Abstract

The application provides a method for treating blast furnace tuyere coal gas leakage, comprising the following steps: taking the outside of the gap between a large tuyere sleeve and a second tuyere sleeve of a blast furnace tuyere as a polishing surface; polishing the polishing surface to form a rough surface and removing impurities on the rough surface; brushing several layers of epoxy resin on the rough surface, brushing the next layer of epoxy resin after the solidification of each layer of epoxy resin, and forming an adhesion layer after the solidification of each layer of epoxy resin. Compared with the prior art, the method in the scheme polishes and applies glue at the gap between the outside of the large tuyere sleeve and the second tuyere sleeve, forms multiple adhesion layers, blocks the gap, and prevents coal gas leakage.

Description

Technical Field

[0001] This invention relates to the field of blast furnace technology, and in particular to a method for dealing with gas leakage at the blast furnace tuyeres. Background Technology

[0002] The tuyere is one of the most critical structures in a blast furnace, and its operational status directly affects the stability and safety of blast furnace production. The tuyere consists of a large tuyere sleeve, a second tuyere sleeve, and a small tuyere sleeve. Gaps can form at the junction of the large and second tuyere sleeves due to deformation during assembly or the presence of impurities, leading to gas leaks. Such leaks not only waste energy but can also cause serious safety accidents such as carbon monoxide poisoning, severely threatening the lives of workers and affecting the operation of the blast furnace equipment.

[0003] To address the issue of gas leakage from the gap between the main tuyeres and the secondary tuyeres in a blast furnace, the traditional method uses water sealing to block the leakage. However, this method has several problems: 1. The water seal only covers part of the leak point; gas can still seep out from the waterless area, failing to eliminate the leakage hazard. 2. When the leakage is large, continuous water injection is required to maintain the water seal, leading to a significant increase in industrial water consumption and consequently increasing the cost of molten iron production. 3. During water injection, workers are exposed to the gas leak environment, increasing the risk of poisoning; simultaneously, water flows along the furnace shell to the furnace base, forming stagnant water that may cause equipment corrosion or structural damage. 4. Manual water injection is time-consuming and difficult to control precisely, disrupting the normal production rhythm of the blast furnace. Summary of the Invention

[0004] This invention provides a method for handling gas leakage at blast furnace tuyeres, in order to solve the technical problem of potential safety accidents caused by leaking gas at blast furnace tuyeres.

[0005] The present invention provides a method for treating gas leakage at a blast furnace tuyeres, comprising:

[0006] The outer part of the gap between the main tuyere sleeve and the second tuyere sleeve on the blast furnace tuyere is used as the polishing surface; The surface to be polished is then roughened, and impurities on the roughened surface are removed. Several layers of epoxy resin are brushed onto the rough surface. After each layer of epoxy resin has cured, the next layer of epoxy resin is brushed on. Each layer of epoxy resin cures to form an adhesive layer.

[0007] In one embodiment of the present invention, after the polishing surface is polished to form a rough surface, impurities are removed by blowing air onto the rough surface.

[0008] In one embodiment of the present invention, after the polishing surface is polished to form a rough surface, a hair dryer is used to blow air onto the rough surface to remove impurities.

[0009] In one embodiment of the present invention, 2-5 layers of epoxy resin are brushed onto the rough surface.

[0010] In one embodiment of the present invention, the roughness of the rough surface is greater than Ra50.

[0011] In one embodiment of the present invention, the roughness of the rough surface is greater than Ra50.

[0012] The beneficial effects of this invention: The method for treating gas leakage at blast furnace tuyeres proposed in this invention effectively prevents gas leakage between the two tuyere sleeves by applying adhesive to the external gaps between the main tuyere sleeve and the secondary tuyere sleeve, making blast furnace tuyere platform operations safer and reducing the occurrence of gas poisoning accidents. The external gaps between the main and secondary tuyere sleeves are located outside the blast furnace tuyere, making grinding, cleaning, and adhesive application relatively convenient. This method is easy to operate. The rough surface facilitates effective adhesion of epoxy resin, forming a stable adhesive layer, thereby effectively preventing gas leakage. The multi-layered adhesive layer seals leaking gaps better and provides more stable leakage prevention. Compared with existing technologies, the method in this solution grinds and applies adhesive to the external gaps between the main and secondary tuyere sleeves, forming multi-layered adhesive layers to seal the gaps and prevent gas leakage. Attached Figure Description

[0013] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0014] In the attached diagram: Figure 1 This is a cross-sectional view of a blast furnace tuyeres in an example of a method for treating blast furnace tuyeres gas leakage according to the present invention. Figure 2 Displayed as Figure 1 The left view (showing the rough surface); Figure 3 Displayed as Figure 1 The left view in the image (showing the adhesive layer).

[0015] The attached figures are labeled as follows: Large air vent 10, Second air vent 11, Small air vent 12, Polished surface 20, Rough surface 21, Adhesive layer 22. Detailed Implementation

[0016] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0017] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0018] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0019] This invention discloses a method for handling gas leakage at a blast furnace tuyeres, wherein the structure of the blast furnace tuyeres is as follows: Figures 1 to 3 As shown, the method includes the following steps: The outer part of the gap between the tuyere main sleeve 10 and the tuyere secondary sleeve 11 on the blast furnace tuyere is used as the polishing surface 20. The polishing surface 20 is polished to form a rough surface 21, and impurities on the rough surface 21 are removed. Several layers of epoxy resin are brushed onto the rough surface 21. After each layer of epoxy resin is cured, the next layer of epoxy resin is brushed on. Each layer of epoxy resin is cured to form an adhesive layer 22.

[0020] Among them, professional tools are used to polish the outer surface 20 of the gap between the large air vent sleeve 10 and the second air vent sleeve 11 to make the surface rough, which is conducive to the effective adhesion of epoxy resin to the surface and plays a role in stabilizing the adhesive layer 22.

[0021] In practical implementation, applying adhesive to the external gaps between the large tuyere sleeve 10 and the second tuyere sleeve 11 effectively prevents gas leakage between them, making blast furnace tuyere platform operations safer and reducing the occurrence of gas poisoning accidents. The external gaps between the large tuyere sleeve 10 and the second tuyere sleeve 11 are located outside the blast furnace tuyere, making grinding, cleaning, and adhesive application relatively convenient, thus making this method easy to operate. The rough surface 21 facilitates effective adhesion of epoxy resin, forming a stable adhesive layer 22, thereby effectively preventing gas leakage. The multi-layered adhesive layer 22 seals leaking gaps better, resulting in a more stable leak-proof effect. This effectively reduces blast furnace air consumption and gas leakage in the furnace belly, reducing blast furnace costs to some extent. It also eliminates the problem of water accumulation in the furnace base caused by water-sealing methods for gas sealing.

[0022] In some embodiments, after the polishing surface 20 is polished to form a rough surface 21, impurities are removed by blowing air onto the rough surface 21. Cleaning the rough surface 21 can prevent impurities from remaining on the polished rough surface, which could affect the adhesion of the epoxy resin.

[0023] In some embodiments, after the polishing surface 20 is polished to form a rough surface 21, a hair dryer is used to blow air onto the rough surface 21 to remove impurities. The hair dryer is simple to operate, readily available, and can effectively clean the rough surface 21.

[0024] In some embodiments, 2-5 layers of epoxy resin are brushed onto the roughened surface 21. This allows for the formation of a better adhesive layer 22.

[0025] In some embodiments, three layers of epoxy resin are brushed onto the roughened surface 21. The number of adhesive layers 22 is minimized to simplify the operation process, while ensuring gas leakage is prevented.

[0026] In some embodiments, the roughness of the roughened surface 21 is greater than Ra50. For example, Figure 3 As shown, the roughness is level 1, and the arithmetic mean deviation of its roughness profile is 50 micrometers (μm), which can improve the adhesion effect of the adhesive layer 22.

[0027] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for treating gas leakage at blast furnace tuyeres, characterized in that, include: The outer part of the gap between the main tuyere sleeve and the second tuyere sleeve on the blast furnace tuyere is used as the polishing surface; The surface to be polished is then roughened, and impurities on the roughened surface are removed. Several layers of epoxy resin are brushed onto the rough surface. After each layer of epoxy resin has cured, the next layer of epoxy resin is brushed on. Each layer of epoxy resin cures to form an adhesive layer.

2. The method for treating blast furnace tuyeres gas leakage according to claim 1, characterized in that: After the polishing surface is polished to form a rough surface, impurities are removed by blowing air onto the rough surface.

3. The method for treating blast furnace tuyeres gas leakage according to claim 2, characterized in that: After the surface is sanded to create a rough surface, use a hair dryer to blow air onto the rough surface to remove impurities.

4. The method for treating blast furnace tuyeres gas leakage according to claim 1, characterized in that: Apply 2-5 coats of epoxy resin to the rough surface.

5. The method for treating blast furnace tuyeres gas leakage according to claim 4, characterized in that: Apply three coats of epoxy resin to the rough surface.

6. A method for treating blast furnace tuyeres gas leakage according to any one of claims 1-5, characterized in that: The roughness of the rough surface is greater than Ra50.

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