Gas protection system for preventing steel permeation of steel ladle air brick
By designing a gas protection system in the ladle smelting system, using the combination of the gas storage bag and a check valve, the reverse suction problem caused by the instantaneous negative pressure of the pipeline at the end of the steel blowing is solved, and air-permeable brick blockage and steel leakage accidents are avoided.
Patent Information
- Application Number
- CN202421343930.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-13
AI Technical Summary
During the ladle smelting process, when the steel water blows, the pressure relief and unpluging of the pipe will cause the pipeline to form instantaneous negative pressure, which may lead to the back-sucking of the steel water into the breathable bricks, causing the risk of blockage or even steel leakage accidents.
A gas protection system is designed, including a gas storage bag and a check valve. The gas storage bag is used to store a certain amount of gas. When the blown air in the ladle is completed, the joint action of the check valve and the gas storage bag prevents the pipeline from forming instantaneous negative pressure and prevents the steel from being suctioned into the air-permeable bricks.
It effectively prevents the instantaneous negative pressure formed when the ladle blowing pipe is released, avoids the back-sucking of the air-permeable bricks by the steel, and avoids the blockage and steel leakage of the air-permeable bricks.
Smart Images
Figure CN222660109U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an auxiliary device for a steelmaking ladle car, in particular to a gas protection system for preventing steel ladle air-permeable bricks from leaking steel. Background Art
[0002] Permeable bricks are usually made of high-temperature refractory materials with good refractory and permeability. In the ladle smelting process, argon is often introduced into the molten steel to protect it from oxidation. Argon is an inert gas that does not react with molten steel, so it can effectively prevent the oxidation of molten steel. The ladle bottom blowing permeable brick is to blow gas into the molten steel evenly, thereby protecting the molten steel. The special structure of the permeable brick is the key to achieving this goal. Permeable bricks are usually composed of many micropores, which allow gas to pass through the brick body into the molten steel. Through the structural design of the permeable brick, the speed and distribution of gas entering the molten steel can be controlled, thereby protecting and regulating the molten steel. In the actual production operation process, when the gas source is closed for pressure relief and pipe pulling, the gas in the pipe is quickly discharged to form an instantaneous negative pressure, and there is a risk of molten steel backflowing into the bottom blowing permeable brick, causing blockage or even steel leakage. Utility Model Content
[0003] In view of the above problems, the utility model provides a gas protection system which can store a certain amount of gas. When the blowing of molten steel in the ladle is completed, it can prevent the formation of instantaneous negative pressure in the pipeline due to pressure relief and pipe pulling, so as to prevent the risk of blockage of the air bricks or even steel leakage caused by steel seepage in the air bricks of the ladle.
[0004] The purpose of the utility model is achieved as follows. A gas protection system for preventing steel from seeping through ladle air bricks comprises a ladle and an air storage bag, wherein a one-way valve is installed on the outside of the ladle, a quick connector is connected to the outer end of the one-way valve, and the inner side of the one-way valve is connected to the air brick at the bottom of the ladle through a pipeline; the quick connector is connected to the gas pipeline on one side of the air storage bag through a metal hose, a sewage outlet is provided at the bottom of the air storage bag, a first stop valve is installed on the gas source pipe and connected to the gas storage bag, and a vent pipe with a second stop valve is connected to the gas source pipe connected to the first stop valve and the gas storage bag.
[0005] Furthermore, the air storage bag is a closed cylindrical structure.
[0006] Furthermore, the interface between the gas source pipe and the gas storage bag is slightly higher than the bottom plane of the gas storage bag.
[0007] Furthermore, the one-way valve is a high temperature resistant one-way valve.
[0008] The utility model can store a certain amount of gas in the gas storage bag as a buffer during pressure relief when the blowing of molten steel in the ladle is completed and the blowing pipeline is depressurized, thereby preventing the phenomenon of instantaneous negative pressure molten steel in the pipeline being sucked back into the air bricks, and avoiding the risk of blockage of the air bricks and even steel leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the system structure of the utility model.
[0010] In the figure: 1. gas storage bag, 2. steel ladle, 3. gas source pipe, 4. first stop valve, 5. second stop valve, 6. vent pipe, 7. gas transmission pipe, 8. sewage outlet, 9. one-way valve, 10. quick connector, 11. air brick, 12. metal hose. DETAILED DESCRIPTION
[0011] The utility model is described in detail below with reference to the accompanying drawings and embodiments. Figure 1 , a gas protection system for preventing steel from seeping through ladle air bricks, comprises a ladle 2 and a gas storage bag 1 of a closed cylindrical structure, a one-way valve 9 is installed on the outside of the ladle 2, a quick connector 10 is connected to the outer end of the one-way valve 9, and the inner side of the one-way valve 9 is connected to the air brick 11 at the bottom of the ladle 2 through a pipeline; the quick connector 10 is connected to the gas delivery pipe 7 on one side of the gas storage bag 1 through a metal hose 12, a sewage outlet 8 is provided at the bottom of the gas storage bag 1, a first stop valve 4 is installed on the gas source pipe 3 and connected to the gas storage bag 1, and the interface between the gas source pipe 3 and the gas storage bag 1 is slightly higher than the bottom plane of the gas storage bag 1. The gas source pipe 3 connected to the first stop valve 4 and the gas storage bag 1 is connected to a vent pipe 6 with a second stop valve 5. The one-way valve 9 adopts a high-temperature resistant one-way valve. Example
[0012] The utility model implements a newly designed gas protection system for preventing steel ladle air bricks from infiltrating steel. The system is installed on the blowing pipelines of the No. 1, No. 2, and No. 3 converter ladle cars. The installation method of low inlet and high outlet is adopted. The lower right side of the device is the gas inlet and the upper left side is the gas outlet. This installation method can make the impurities in the gas settle in the gas storage bag to prevent them from entering the narrow gap of the air bricks and causing blockage. At the same time, a protective plate is installed on the outside of the gas storage bag to prevent it from being damaged and causing the problem of being unable to blow.
[0013] Operation method: After the ladle is dropped onto the ladle car by the crane, the gas pipe 7 is connected to the quick connector 10 through the metal hose 12. When the ladle receives molten steel, the first stop valve 4 on the gas source pipe 3 is opened (the second stop valve 5 is in a closed state at this time) to perform the molten steel blowing process. After the blowing process is completed, the first stop valve 4 on the gas source pipe 3 is closed. Since there is air pressure on the blowing pipeline, before pulling out the metal hose 12 on the quick connector 10, it is necessary to open the second stop valve 5 on the release pipe 6 to release the pressure. Due to the combined effect of the gas storage bag 1 and the one-way valve 9, the gas on the blowing pipeline can effectively prevent the formation of instantaneous negative pressure on the blowing pipeline during release, and the phenomenon of sucking the molten steel back into the air brick. After the metal hose is pulled out, the second stop valve 5 is closed.
[0014] The implementation of the utility model utilizes the gas storage bag to store a certain amount of gas, and the function of the one-way valve to prevent the instantaneous negative pressure formed when the ladle blowing pipeline is released from the ladle from sucking the molten steel back into the air brick. Since the installation and operation of the gas protection system, the ladle air brick has been blown normally, and the air brick blockage and steel leakage have not occurred.
Claims
1. A gas protection system for preventing steel from seeping through ladle air bricks, characterized in that: It comprises a ladle and an air storage bag, wherein a one-way valve is installed on the outside of the ladle, the outer end of the one-way valve is connected to a quick connector, the inner side of the one-way valve is connected to the air-permeable brick at the bottom of the ladle through a pipeline; the quick connector is connected to the gas supply pipe on one side of the air storage bag through a metal hose, a sewage outlet is arranged at the bottom of the air storage bag, a first stop valve is installed on the air source pipe and connected to the air storage bag, and a venting pipe with a second stop valve is connected to the air source pipe connected to the first stop valve and the air storage bag.
2. The gas protection system for preventing steel leakage from ladle air-permeable bricks according to claim 1 is characterized in that: The air storage bag is a closed cylindrical structure.
3. The gas protection system for preventing steel leakage from ladle air-permeable bricks according to claim 1 is characterized in that: The interface between the gas source pipe and the gas storage bag is slightly higher than the bottom plane of the gas storage bag.
4. The gas protection system for preventing steel leakage from ladle air-permeable bricks according to claim 1 is characterized in that: The one-way valve is a high temperature resistant one-way valve.