An automatic slag addition and slag-gas separation device for protective slag.

Abstract

This utility model belongs to the field of iron and steel smelting technology, and particularly relates to an automatic slag-gas separation device for protective slag. It includes a shell, with a feed pipe tangentially connected to the upper part of the shell. An outlet pipe is fixed to the top of the shell, penetrating the shell. A spiral plate is welded to the outer wall of the outlet pipe. Several pipe holes are opened on the outlet pipe inside the shell. A pipe cap is threaded to the top of the outlet pipe, and an outlet hole is opened on the side of the pipe cap. A discharge box is inclinedly connected to the bottom of the shell. This utility model consumes most of the kinetic energy of the blowing gas through the spiral plate. The remaining kinetic energy is insufficient to blow the protective slag out of the crystallizer again, achieving slag-gas separation, thereby reducing protective slag waste and reducing the amount of protective slag scattered on the cover plate, thus reducing the labor intensity of employees.

Description

Technical Field

[0001] This utility model belongs to the field of iron and steel smelting technology, and in particular relates to an automatic slag addition and slag gas separation device for protective slag. Background Technology

[0002] Modern steel production pursues a high degree of automation and intelligence, and the automatic addition of flux in continuous casting is a crucial component of this automation and intelligence. Automatic addition allows for more precise control of flux usage, reducing waste and thus lowering production costs. Manual flux addition operates in harsh environments, including high temperatures and dust hazards. Automatic addition reduces worker exposure time to these dangers. During continuous casting, flux plays a vital role in improving billet surface quality, controlling heat transfer, and preventing secondary oxidation of molten steel. However, manual flux addition struggles to achieve precise and stable control, affecting the consistency and stability of billet quality.

[0003] Although automatic slag addition is more precise than manual addition, waste still exists. Compressed air blows through the hoses, and at the outlet, some of the protective slag is carried away by the compressed air, resulting in waste. The protective slag carried away by the pressure control scatters on the crystallizer cover and slag channel. The crystallizer cover needs to be cleaned after each furnace, and the slag channel requires a stop-casting process after each casting, greatly increasing the workload of the workers. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic slag addition and slag-gas separation device for protective slag, so as to solve the problems existing in the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An automatic slag addition and slag-gas separation device for protective slag includes a shell, a feed pipe tangentially connected to the upper part of the shell, an outlet pipe fixed to the top of the shell that penetrates the shell, a spiral plate welded to the outer wall of the outlet pipe, several pipe holes opened on the outlet pipe inside the shell, a pipe cap threaded to the top of the outlet pipe, an outlet hole opened on the side of the pipe cap, and a discharge box connected to the inclined bottom of the shell.

[0007] Furthermore, the upper part of the shell is a closed cylinder, and the lower part of the shell is conical, with a flange welded to one end of the conical shell.

[0008] Furthermore, the discharge box is closed at one end and open at the other. The closed end of the discharge box is connected to a connecting pipe, and a flange is welded on the connecting pipe. The flange on the connecting pipe is bolted to the flange at the bottom of the shell. The discharge box is connected to the shell through the connecting pipe and the flange.

[0009] Furthermore, the height of the closed end of the discharge box is greater than the height of the open end, and the width of the closed end of the discharge box is less than the width of the open end. A baffle is welded to the open end of the discharge box.

[0010] Furthermore, the outer wall of the top of the vent pipe is threaded externally, the bottom of the vent pipe is closed, and the pipe hole is located on the side of the vent pipe opposite to the feed pipe.

[0011] Furthermore, the cap is threaded onto the threaded end of the vent pipe.

[0012] Furthermore, the spiral plate is a non-uniformly spaced spiral, and the distance between two adjacent spiral layers gradually increases from bottom to top. The overall width of the spiral plate is the inner diameter of the shell.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model consumes most of the kinetic energy of the blowing gas through the spiral plate. The remaining kinetic energy is insufficient to blow the protective slag out of the crystallizer again, thereby achieving slag-gas separation, reducing the waste of protective slag, reducing the amount of protective slag scattered on the cover plate, and thus reducing the labor intensity of employees.

[0015] 2. When the protective slag is first blown in, its kinetic energy is relatively large, so the pitch of the spiral plates is relatively large. As the kinetic energy of the blowing gas is consumed, the pitch of the spiral plates becomes smaller as it goes down, which can increase the number of spiral turns in the shell, so that the protective slag stays in the shell for a longer time and more blowing gas is discharged.

[0016] 3. The cap can control the amount of air released from the vent. It can be adjusted according to the type of protective slag. Tightening the cap in one direction will make the vent smaller, which is suitable for powdery slag. Conversely, tightening it in another direction will make the vent larger, which is suitable for granular slag.

[0017] 4. The back-facing design of the pipe hole can prevent the blowing gas from carrying protective slag into the gas outlet pipe. At the same time, the blowing gas needs to rotate 180 degrees to enter the pipe hole, thereby consuming its kinetic energy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0020] The components are: 1. Shell; 2. Feed pipe; 3. Air outlet pipe; 4. Spiral plate; 5. Pipe hole; 6. Pipe cap; 7. Air outlet; 8. Discharge box; 9. Flange; 10. Connecting pipe; 11. Baffle. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the scope of the utility model.

[0022] like Figure 1-2 As shown, an automatic slag addition and slag-gas separation device for protective slag includes a shell 1. A feed pipe 2 is tangentially connected to the upper part of the shell 1. An outlet pipe 3 is fixed to the top of the shell 1 and passes through the shell 1. A spiral plate 4 is welded to the outer wall of the outlet pipe 3. Several pipe holes 5 are opened on the outlet pipe 3 inside the shell 1. A pipe cap 6 is threaded to the top of the outlet pipe 3. An outlet hole 7 is opened on the side of the pipe cap 6. A discharge box 8 is inclinedly connected to the bottom of the shell 1.

[0023] The upper part of the shell 1 is a closed cylindrical shape, and the lower part of the shell 1 is a conical shape. A flange 9 is welded to one end of the conical shell 1.

[0024] The discharge box 8 is closed at one end and open at the other end. The closed end of the discharge box 8 is connected to a connecting pipe 10. A flange 9 is welded on the connecting pipe 10. The flange 9 on the connecting pipe 10 is bolted to the flange 9 at the bottom of the shell 1. The discharge box 8 is connected to the shell 1 through the connecting pipe 10 and the flange 9.

[0025] The height of the closed end of the discharge box 8 is greater than the height of the open end, and the width of the closed end of the discharge box 8 is less than the width of the open end. A baffle 11 is welded to the open end of the discharge box 8.

[0026] The outer wall of the top of the vent pipe 3 is threaded externally, the bottom of the vent pipe 3 is closed, and the pipe hole 5 is located on the side of the vent pipe 3 facing away from the feed pipe 2.

[0027] The cap 6 is threaded onto the external threaded end of the vent pipe 3.

[0028] The spiral plate 4 is a non-uniformly spaced spiral. The distance between two adjacent spiral layers of the spiral plate 4 gradually increases from bottom to top. The overall width of the spiral plate 4 is the inner diameter of the shell 1.

[0029] The 8-shaped design of the discharge box allows the accumulated protective slag to spread out and fall relatively evenly from the flat outlet.

[0030] The working principle of this utility model is as follows:

[0031] During use, the protective slag is tangentially blown into the shell 1 through the feed pipe 2 by the blowing air. Under the guidance of the spiral plate 4, the protective slag spirals down tangentially along the inner wall of the shell 1. The blowing air enters the outlet pipe 3 through the pipe hole 5 and is discharged from the outlet hole 7 on the pipe cap 6. In this process, the spiral plate 4 consumes most of the kinetic energy of the blowing air. The remaining kinetic energy is insufficient to blow the protective slag out of the crystallizer again, thus achieving slag-gas separation, thereby reducing the waste of protective slag and reducing the amount of protective slag scattered on the cover plate, thereby reducing the labor intensity of employees.

[0032] When the protective slag is first blown in, its kinetic energy is relatively large, so the pitch of the spiral plate 4 is relatively large. As the kinetic energy of the blowing gas is consumed, the pitch of the spiral plate becomes smaller as it goes down, which increases the number of spiral turns in the shell 1, so that the protective slag stays in the shell 1 for a longer time and more blowing gas is discharged.

[0033] Protective slag is divided into two types: powdered slag and granular slag. The blowing air pressure for powdered slag is lower than that for granular slag. The cap 6 can control the amount of air discharged from the vent 7. It can be adjusted according to the type of protective slag. Tightening the cap 6 in one direction will make the vent 7 smaller, which is suitable for powdered slag. Conversely, loosening the cap 6 will make the vent 7 larger, which is suitable for granular slag.

[0034] The design of the back-facing pipe hole 5 can prevent the blowing gas from carrying protective slag into the gas outlet pipe 3. At the same time, the blowing gas needs to rotate 180 degrees to enter the pipe hole 5, thereby consuming its kinetic energy.

[0035] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention.

[0036] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. An automatic slag-gas separation device for protective slag, characterized in that, The device includes a housing, with a feed pipe tangentially connected to the upper part of the housing, an air outlet pipe fixed to the top of the housing and extending through the housing, a spiral plate welded to the outer wall of the air outlet pipe, several pipe holes opened on the air outlet pipe inside the housing, a pipe cap threaded to the top of the air outlet pipe, an air outlet hole opened on the side of the pipe cap, and a discharge box connected to the bottom of the housing at an incline.

2. The automatic slag addition slag gas separation device according to claim 1, characterized in that, The upper part of the shell is a closed cylinder, and the lower part of the shell is conical. A flange is welded to one end of the conical shell.

3. The automatic slag addition slag gas separation device according to claim 2, characterized in that, The discharge box is closed at one end and open at the other. The closed end of the discharge box is connected to a connecting pipe, and a flange is welded on the connecting pipe. The flange on the connecting pipe is bolted to the flange at the bottom of the shell. The discharge box is connected to the shell through the connecting pipe and the flange.

4. The automatic slag addition slag gas separation device according to claim 3, characterized in that, The height of the closed end of the discharge box is greater than the height of the open end, and the width of the closed end of the discharge box is less than the width of the open end. A baffle is welded to the open end of the discharge box.

5. The automatic slag-adding and slag-gas-separating device for protective slag according to claim 1, characterized in that, The outer wall of the top of the vent pipe is threaded externally, the bottom of the vent pipe is closed, and the pipe hole is located on the side of the vent pipe opposite to the feed pipe.

6. The automatic slag addition and slag-gas separation device for protective slag according to claim 5, characterized in that, The cap is threaded onto one end of the external thread of the vent pipe.

7. The automatic slag addition and slag-gas separation device for protective slag according to claim 1, characterized in that, The spiral plate is a non-uniformly spaced spiral, and the distance between two adjacent spiral layers gradually increases from bottom to top. The overall width of the spiral plate is the inner diameter of the shell.

Images