Blocking method and structure of ascending flue connecting part of flash converting furnace

Abstract

The invention discloses a plugging method and structure for a flash converting furnace uptake flue connecting part. The structure comprises the steps that a formwork supporting component is arranged below two strip-shaped water jackets, ramming mass is poured in the middle area of the two strip-shaped water jackets, and a special plug is installed on the upper surface of a supporting body in a conformal matching mode after the ramming mass is solidified to form the supporting body; sequentially executing a plurality of steps in the method; the lower portions of the two strip-shaped water jackets of the connecting part are supported by thin steel plates, ramming materials are poured, a stable and uniform supporting foundation is provided for the special plug, and the influence of expansion of furnace wall bricks on the two sides of the strip-shaped water jackets on the sealing effect of the special plug is effectively prevented; when the smoke route needs to be switched, only the ramming material and the thin steel plate used by the formwork component need to be knocked down into the furnace to be abandoned, and complex sticking substance cleaning work does not need to be carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of nonferrous metal smelting, and in particular to a method and structure for blocking a connection portion of an ascending flue of a flash converting furnace. Background Art

[0002] In the prior art, during the normal operation of a flash refining furnace, the high-temperature sulfur dioxide flue gas generated therein passes through the ascending flue and the connection part and enters the waste heat boiler to achieve heat recovery and utilization. However, when the waste heat boiler is in the cold maintenance stage, the flue gas route must be switched so that the flue gas bypasses the waste heat boiler and enters the electrostatic precipitator or ring collection system. In this process, the traditional sealing operation is to lift the water-cooled baffle and then use a special plug to seal the connection part. However, practice has shown that special plugs are prone to deformation, or serious bonding problems will occur on both sides of the connection part, which directly leads to a significant reduction in the sealing effect of this area and a serious phenomenon of flue gas leakage. To compensate for this defect, it is often necessary to use ramming material to re-seal the plug. However, when the flue gas route needs to be switched again, after the plug is lifted with an electric hoist, it is discovered that the adhesion below the plug (i.e., inside the connection) is extremely poor, so it is necessary to arrange for operators to go deep into the extremely harsh and narrow space and use tools such as jackhammers to carry out the difficult cleaning work. Only after it is clean can the water-cooled baffle be lowered again. This traditional plugging method is not only cumbersome to operate, but also greatly increases labor and time costs, and also poses a serious threat to the health of the operators. In terms of the current status of plugging technology for the connection of flash refining furnaces, the vast majority of copper smelters generally use dedicated plugs for plugging operations. However, in terms of specific plugging methods, some use insulation cotton covering for plugging, while others choose to use ramming materials for plugging. Despite the different methods, it is ultimately difficult to avoid extremely severe adhesion below the plug (inside the connection), which makes cleaning work extremely difficult.

[0003] At present, the following problems still exist: 1. Although the traditional insulation cotton covering and sealing method can play a certain role in insulation and sealing in the initial stage, as time goes by and the high-temperature flue gas continues to scour and erode, the insulation cotton is very likely to fall off and stick together, which leads to sealing failure; 2. The simple ramming material sealing method, due to the changes in the characteristics of the ramming material in a high-temperature environment and the chemical reaction with impurities in the flue gas, will also cause serious adhesion under the plug, which brings huge challenges to subsequent cleaning and maintenance work.

[0004] Therefore, a method and structure for blocking the connection portion of the ascending flue of a flash converting furnace are proposed. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a method and structure for blocking the connection portion of the ascending flue of a flash converting furnace.

[0006] The technical solutions of the present invention are as follows:

[0007] A method for blocking a connection portion of an ascending flue of a flash converting furnace comprises performing the following steps in sequence:

[0008] S1. Lift the water-cooling baffle to expose the operating space of the connection part below the strip water jacket;

[0009] S2. Support formwork components under the two strip water jackets and hang the formwork components on the strip water jackets to form a casting cavity;

[0010] S3, pouring ramming material in the middle area of ​​the two strip-shaped water jackets above the formwork components. After the ramming material naturally solidifies, the formwork components and the ramming material form a supporting seal that can be removed as a whole;

[0011] S4. After the ramming material solidifies, place the special plug on the upper surface of the ramming material support;

[0012] S5. Switch the flue gas route. First, remove the hanging formwork components. Then use a jackhammer or rock drill to directly impact the support body formed by the ramming material, so that the formwork components and the ramming material support body fall off simultaneously.

[0013] S6. Directly reset the water-cooling baffle, omitting the adhesive cleaning process.

[0014] Preferably, the formwork member is a high-temperature resistant thin steel plate with a thickness not greater than 3 mm, and the formwork member is hung on the strip water jacket through a hanging device.

[0015] Preferably, the surface of the formwork member is coated with a silicon carbide-based anti-stick coating.

[0016] Preferably, a Z-shaped expansion joint is provided at the edge of the formwork component, and a buffer gap with adjustable width is formed between the expansion joint and the strip water jacket.

[0017] Preferably, in the pouring operation of step S3, a high-frequency pneumatic vibrator is used for vibration, and the vibration depth is ≥80% of the pouring height.

[0018] Preferably, an optical fiber strain sensor is embedded in the side wall of the strip water jacket in step S2 to monitor the compressive deformation of the ramming material support in real time.

[0019] A method for sealing the connection of an ascending flue of a flash converting furnace is applied to a sealing structure for the connection of an ascending flue of a flash converting furnace. Formwork components are provided below two strip water jackets, and the formwork components are hung on the strip water jackets. Ramming material is poured in the middle area of ​​the two strip water jackets. After the ramming material solidifies to form a support body, a special plug is installed on the upper surface of the support body.

[0020] The present invention has the following beneficial effects:

[0021] 1. The present invention uses thin steel plates to support the formwork and pour ramming material under the two strip water jackets at the connection part, providing a stable and uniform support foundation for the special plug, effectively preventing the expansion of the furnace wall bricks on both sides of the strip water jacket from affecting the sealing effect of the special plug, and avoiding the problem of poor sealing caused by deformation of the special plug or adhesion of the two sides;

[0022] 2. When the flue gas route needs to be switched, the present invention only requires the ramming materials and thin steel plates used for formwork components to be dropped into the furnace and discarded, eliminating the need for complex cleaning of adhesives. This process significantly shortens the flue gas route switching time from several hours or even days in traditional methods to only about one hour, greatly improving production efficiency and reducing equipment downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 Schematic diagram of the water-cooling baffle structure in the present invention;

[0025] Figure 3 It is a schematic diagram of the special plug in the present invention.

[0026] The reference numerals in the figures are as follows:

[0027] 1. Water-cooling baffle; 2. Strip water jacket; 3. Formwork steel plate; 4. Special plug. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] See also Figures 1 to 3 A method for blocking the connection portion of the ascending flue of a flash converting furnace comprises performing the following steps in sequence:

[0030] S1. Lift the water-cooling baffle 1 to expose the operating space of the connection part below the strip water jacket 2;

[0031] S2. Support formwork members 3 below the two strip water jackets 2 and hang the formwork members 3 on the strip water jackets to form a casting cavity;

[0032] S3, pouring ramming material in the middle area of ​​the two strip-shaped water jackets 2 above the formwork member 3. After the ramming material naturally solidifies, the formwork member 3 and the ramming material form a supporting seal that can be removed as a whole;

[0033] S4. After the ramming material solidifies, place the special plug 4 on the upper surface of the ramming material support;

[0034] S5, switching the flue gas route, first dismantling the hanging formwork member 3, and then using a jackhammer or rock drill to directly impact the support body formed by the ramming material, so that the formwork member 3 and the ramming material support body 5 fall off synchronously;

[0035] S6. Directly reset the water-cooling baffle 1 and omit the adhesive cleaning process.

[0036] Furthermore, the formwork member 3 is a high-temperature resistant thin steel plate with a thickness not greater than 3 mm, and the formwork member 3 is hung on the strip water jacket 2 through a hanging device.

[0037] Furthermore, the surface of the formwork member 3 is coated with a silicon carbide-based anti-stick coating.

[0038] Furthermore, a Z-shaped expansion joint is provided at the edge of the formwork component 3 , and a buffer gap with adjustable width is formed between the expansion joint and the strip-shaped water jacket 2 .

[0039] Furthermore, in the pouring operation of step S3, a high-frequency pneumatic vibrator is used for vibration, and the vibration depth is ≥80% of the pouring height.

[0040] Furthermore, in step S2 , an optical fiber strain sensor is embedded in the side wall of the strip-shaped water jacket 2 to monitor the compressive deformation of the ramming material support in real time.

[0041] A method for sealing the connection of the ascending flue of a flash converting furnace is applied to a sealing structure for the connection of the ascending flue of a flash converting furnace. A formwork member 3 is provided below two strip water jackets 2. Ramming material is poured in the middle area of ​​the two strip water jackets 2. After the ramming material solidifies to form a support body, a special plug 4 is installed on the upper surface of the support body in a conformal manner.

[0042] Working principle of the present invention:

[0043] In the present invention, a sealing structure for the connection portion of the ascending flue of a flash converting furnace is provided. A formwork member 3 is provided below two strip water jackets 2. Ramming material is poured in the middle area of ​​the two strip water jackets 2. After the ramming material solidifies to form a support body, a special plug 4 is installed on the upper surface thereof in a conformal manner. A method for sealing the connection of the ascending flue of a flash converting furnace is applied to this structure. First, the water-cooling baffle 1 is lifted to expose the operating space of the connection below the strip water jacket 2. Then, a cut is made from below the two strip water jackets 2 at the connection. Then, a formwork member 3 is set below the two strip water jackets 2 and hung on the strip water jacket to form a casting cavity. The formwork member 3 is a high-temperature resistant thin steel plate with a thickness of no more than 3 mm. An optical fiber strain sensor is embedded in the side wall of the strip water jacket 2 to monitor the compressive deformation of the ramming material support in real time. At the same time, the surface of the formwork member 3 is coated with a silicon carbide-based anti-stick coating. The edge of the formwork member 3 is provided with a Z-shaped expansion joint, forming a buffer gap with an adjustable width between the expansion joint and the strip water jacket 2.

[0044] Next, ramming material is poured in the middle area of ​​the two strip water jackets 2 above the formwork member 3. After the ramming material naturally solidifies, the formwork member 3 and the ramming material form a supporting sealing body that can be removed as a whole; during the pouring operation, a high-frequency pneumatic vibrator is used for vibration, and the vibration depth is ≥80% of the pouring height.

[0045] Then, after the ramming material solidifies, the special plug 4 is placed on the upper surface of the ramming material support;

[0046] When the flue gas route is switched, the hanging formwork member 3 is first removed, and then a jackhammer or rock drill is used to directly impact the support body formed by the ramming material, causing the formwork member 3 and the ramming material support body to fall off simultaneously and be dropped into the furnace for disposal, eliminating the need for complicated cleaning of adhesives. This process significantly reduces the time required to switch the flue gas route from several hours or even days with traditional methods to only about one hour, greatly improving production efficiency and reducing equipment downtime.

[0047] Finally, the water-cooling baffle 1 is directly reset, and the adhesive cleaning process is omitted.

[0048] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for blocking the connection of the ascending flue of a flash converting furnace, characterized in that Follow these steps in order: S1. Lift the water-cooling baffle (1) to expose the operating space of the connection portion below the strip water jacket (2); S2. Supporting a formwork component (3) below the two strip-shaped water jackets (2), and hanging the formwork component (3) on the strip-shaped water jackets (2) to form a casting cavity; S3, pouring ramming material in the middle area of ​​the two strip-shaped water jackets (2) above the formwork member (3), and after the ramming material naturally solidifies, the formwork member (3) and the ramming material form a supporting sealing body that can be removed as a whole; S4, after the ramming material solidifies, place the special plug (4) on the upper surface of the ramming material support; S5, switching the flue gas route, first dismantling the hanging formwork member (3), and then using a jackhammer or a rock drill to directly impact the support body formed by the ramming material, so that the formwork member (3) and the ramming material support body fall off synchronously; S6. Directly reset the water-cooling baffle (1) and omit the adhesive cleaning process.

2. The method for blocking the connection portion of the ascending flue of a flash converting furnace according to claim 1, characterized in that: The formwork component (3) is a high-temperature resistant thin steel plate with a thickness not greater than 3 mm, and the formwork component (3) is hung on the strip-shaped water jacket (2) through a hanging device.

3. The method for blocking the connection portion of the ascending flue of a flash converting furnace according to claim 2, characterized in that: The surface of the formwork component (3) is coated with a silicon carbide-based anti-stick coating.

4. The method for blocking the connection portion of the ascending flue of a flash converting furnace according to claim 3, characterized in that: A Z-shaped expansion joint is provided on the edge of the formwork component (3), and a buffer gap with adjustable width is formed between the expansion joint and the strip-shaped water jacket (2).

5. The method for blocking the connection portion of the ascending flue of a flash converting furnace according to claim 1, characterized in that: During the pouring operation in step S3, a high-frequency pneumatic vibrator is used for vibration, and the vibration depth is ≥80% of the pouring height.

6. The method for blocking the connection portion of the ascending flue of a flash converting furnace according to claim 1, characterized in that: In step S2, a fiber optic strain sensor is embedded in the side wall of the strip water jacket (2) to monitor the compression deformation of the ramming material support in real time.

7. A method for blocking a connection portion of an ascending flue of a flash converting furnace according to any one of claims 1 to 6, applied to a blocking structure for a connection portion of an ascending flue of a flash converting furnace, characterized in that: A formwork member (3) is supported below the two strip-shaped water jackets (2), and ramming material is poured into the middle area of ​​the two strip-shaped water jackets (2). After the ramming material solidifies to form a support body, a special plug (4) is installed on the upper surface thereof in a conformal matching manner.

Images