A gas blowing device for an industrial silicon smelting submerged arc furnace

Abstract

This utility model relates to the field of industrial silicon smelting technology, specifically to a gas blowing device for an industrial silicon smelting submerged arc furnace, comprising a furnace body, a main pipe, branch pipes, gas blowing components, and a support and fixing mechanism; one end of the main pipe is connected to multiple branch pipes via a connecting pipe; multiple branch pipes are evenly arranged around the furnace body, and multiple gas blowing components are evenly distributed on each branch pipe; each gas blowing component includes a blowing head and a blowing nozzle, one end of the blowing head is connected to the branch pipe, and the other end is detachably connected to the blowing nozzle, the blowing nozzle is inclined, and has a spiral guide channel inside; the support and fixing mechanism includes a fixing bracket and multiple connecting bolts, the fixing bracket is fitted onto the branch pipes and connected to the furnace body via the connecting bolts, used to fix the branch pipes, so that the branch pipes and the furnace body maintain a relatively fixed positional relationship.

Description

Technical Field

[0001] This utility model relates to the field of industrial silicon smelting technology, specifically to a gas blowing device for an electric arc furnace in industrial silicon smelting. Background Technology

[0002] The submerged arc furnace (SAF) is a key piece of equipment used in the production of industrial silicon. It primarily uses electric arc heating, inserting electrodes into a furnace containing raw materials such as silica and carbonaceous reducing agents. At high temperatures, the raw materials undergo a series of complex chemical reactions, reducing silica to industrial silicon. SAFs offer advantages such as high heating power, high thermal efficiency, and suitability for large-scale production, ensuring continuous and stable industrial silicon production. During the industrial silicon smelting process, the SAF's gas blowing system plays a crucial role. By blowing specific gases, such as argon or nitrogen, into the furnace, it stirs the molten pool, promotes the reaction, improves furnace conditions, and enhances product quality.

[0003] However, in the operation of existing electric arc furnace blowing devices, the blowing pipes are often too concentrated or too sparse, resulting in excessive gas supply in some areas and insufficient supply in others. This unreasonable layout makes it impossible for the gas to diffuse evenly in the furnace, affecting the blowing effect. The smelting process in the electric arc furnace will generate some dust and smoke, and some particulate matter may also be carried into the blowing nozzle by the airflow, making the blowing nozzle risky. In addition, the outlet shape of the blowing nozzle is mostly straight, which makes the impact force and flow field distribution of the gas flow unreasonable, and also makes it easy for impurities to accumulate near the outlet, increasing the possibility of blockage. Utility Model Content

[0004] The purpose of this invention is to provide a gas blowing device for an electric arc furnace in industrial silicon smelting, so as to solve the problems of uneven gas supply and easy blockage of the gas blowing nozzle mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides a gas blowing device for an industrial silicon smelting submerged arc furnace, comprising a furnace body, a main pipe, branch pipes, gas blowing components, and a support and fixing mechanism; one end of the main pipe is connected to multiple branch pipes via a connecting pipe; multiple branch pipes are evenly arranged around the furnace body, and multiple gas blowing components are evenly distributed on each branch pipe; each gas blowing component includes a blowing head and a blowing nozzle, one end of the blowing head is connected to the branch pipe, and the other end is detachably connected to the blowing nozzle, the blowing nozzle is inclined and has a spiral guide channel inside; the support and fixing mechanism includes a fixing bracket and multiple connecting bolts, the fixing bracket is fitted onto the branch pipes and connected to the furnace body via the connecting bolts, used to fix the branch pipes, so that the branch pipes and the furnace body maintain a relatively fixed positional relationship.

[0006] As a preferred technical solution of this utility model, a protective sleeve is fixedly fitted on the outer wall of the branch pipe, and a corrosion-resistant filler layer is filled between the protective sleeve and the branch pipe. The protective sleeve and the corrosion-resistant filler layer can effectively protect the branch pipe from the erosion of high temperature and corrosive gas in the electric arc furnace, and extend the service life of the branch pipe.

[0007] As a preferred technical solution of this utility model, the branch pipe is equipped with a flow regulating valve to regulate the gas flow rate of each branch pipe. The flow regulating valve can flexibly adjust different blowing flow rates according to actual production needs to adapt to different smelting process requirements and improve the controllability of the blowing effect.

[0008] As a preferred technical solution of this utility model, the fixed bracket is a support plate with a U-shaped placement groove. The fixed bracket has mounting holes on both sides. The connecting bolt passes through the mounting holes to fix the fixed bracket to the furnace body. A buffer spring is sleeved on the outside of the connecting bolt, and the buffer spring is located between the furnace body and the fixed bracket.

[0009] As a preferred technical solution of this utility model, the branch pipe connected to one side of the air blowing head is located in the U-shaped placement groove of the fixed bracket, and the two sides of the tail of the air blowing head are fixedly connected to the fixed bracket by fixing bolts.

[0010] As a preferred technical solution of this utility model, a sealing gasket is provided at the connection between the air blowing head and the branch pipe, which can further enhance the sealing of the connection between the air blowing head and the branch pipe, prevent gas leakage, and improve the blowing efficiency.

[0011] As a preferred technical solution of this utility model, a filter screen is provided at the connection between the end of the air nozzle and the air head, and the air nozzle and the air head are connected by a thread to filter impurities that may be carried in the gas, so as to prevent impurities from entering the air nozzle and causing blockage, and to ensure the continuity and stability of air blowing.

[0012] As a preferred embodiment of this utility model, the air nozzle is tilted towards the bottom center of the furnace body, and the pitch of the spiral guide channel inside the air nozzle gradually decreases along the gas flow direction.

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] 1. This submerged arc furnace blowing device achieves a relatively uniform gas distribution within the furnace by evenly surrounding the branch pipes around the furnace body and rationally arranging the blowing components. This effectively improves the blowing effect, promotes the reaction within the furnace, and helps improve the quality of industrial silicon products.

[0015] 2. The air blowing device of this electric arc furnace, through its downward tilting air blowing nozzle, spiral guide channel and filter screen, can prevent impurities from clogging the air blowing nozzle, ensuring the continuity and stability of air blowing, reducing production interruptions caused by poor air blowing, and connecting to the air blowing port by threads for easy disassembly and maintenance.

[0016] 3. By installing protective sleeves and corrosion-resistant filling layers on the outside of the branch pipes, the gas blowing device of this electric arc furnace improves the corrosion resistance and protection performance of the device and extends its service life. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a gas blowing device for an industrial silicon smelting submerged arc furnace according to the present invention.

[0018] Figure 2 This is a structural diagram of the air blowing component of an electric arc furnace for industrial silicon smelting according to the present invention.

[0019] Figure 3 This is a three-dimensional cross-sectional view of the air blowing component of an electric arc furnace for industrial silicon smelting according to this utility model.

[0020] Figure 4 This is a schematic diagram of the material structure of the branch pipes of the gas blowing device for an industrial silicon smelting submerged arc furnace according to the present invention.

[0021] As shown in the figure:

[0022] 1. Furnace body; 2. Main pipe; 3. Branch pipe; 4. Air blowing assembly; 5. Connecting pipe; 6. Air blowing head; 7. Air blowing nozzle; 8. Fixing bracket; 9. Connecting bolt; 10. Protective sleeve; 11. Corrosion-resistant filling layer; 12. Flow regulating valve; 13. U-shaped placement groove; 14. Mounting hole; 15. Buffer spring; 16. Fixing bolt; 17. Sealing gasket; 18. Filter screen. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example 1:

[0026] As per the instruction manual Figure 1-3 As shown, a gas blowing device for an industrial silicon smelting submerged arc furnace includes a furnace body 1, a main pipe 2, a branch pipe 3, a gas blowing assembly 4, and a support and fixing mechanism.

[0027] In this utility model, one end of the main pipe 2 is connected to multiple branch pipes 3 through a connecting pipe 5. The branch pipes 3 are equipped with flow regulating valves 12, which are used to regulate the gas flow rate of each branch pipe 3. The flow regulating valves 12 can flexibly adjust different blowing flow rates according to actual production needs to adapt to different smelting process requirements and improve the controllability of blowing effect.

[0028] In this utility model, multiple branch pipes 3 are evenly arranged around the furnace body 1, and multiple air blowing components 4 are evenly distributed on each branch pipe 3.

[0029] In this utility model, the supporting and fixing mechanism includes a fixed bracket 8 and multiple connecting bolts 9. The fixed bracket 8 is fitted onto the branch pipe 3 and connected to the furnace body 1 through the connecting bolts 9. The fixed bracket 8 is a support plate with a U-shaped placement groove 13. The two side walls of the fixed bracket 8 are provided with mounting holes 14. The connecting bolts 9 pass through the mounting holes 14 to fix the fixed bracket 8 to the furnace body 1. A buffer spring 15 is fitted on the outside of the connecting bolts 9 and is located between the furnace body 1 and the fixed bracket 8. It is used to fix the branch pipe 3 so that the branch pipe 3 and the furnace body 1 maintain a relatively fixed positional relationship.

[0030] In this utility model, the air blowing assembly 4 includes an air blowing head 6 and an air blowing nozzle 7. One end of the air blowing head 6 is connected to a branch pipe 3. The branch pipe 3 connected to one side of the air blowing head 6 is located in the U-shaped placement groove of the fixed bracket 8. The tail of the air blowing head 6 is fixedly connected to the fixed bracket 8 by fixing bolts 16. A sealing gasket 17 is provided at the connection between the air blowing head 6 and the branch pipe 3, which can further enhance the sealing of the connection between the air blowing head 6 and the branch pipe 3, prevent gas leakage, and improve the air blowing efficiency. The other end of the air blowing head 6 is detachably connected to the air blowing nozzle 7 by threads. A filter screen 18 is provided at the connection between the end of the air blowing nozzle 7 and the air blowing head 6 to filter impurities that may be carried in the gas, prevent impurities from entering the air blowing nozzle 7 and causing blockage, and ensure the continuity and stability of air blowing. The air blowing nozzle 7 is inclined and has a spiral guide channel inside. The air blowing nozzle 7 is inclined towards the bottom middle position of the furnace body 1, and the pitch of the spiral guide channel inside the air blowing nozzle 7 gradually decreases along the gas flow direction.

[0031] As per the instruction manual Figure 4 As shown, a protective sleeve 10 is fixedly fitted on the outer wall of the branch pipe 3, and a corrosion-resistant filler layer 11 is filled between the protective sleeve 10 and the branch pipe 3. The protective sleeve 10 and the corrosion-resistant filler layer 11 can effectively protect the branch pipe 3 from the erosion of high temperature and corrosive gas in the electric arc furnace, and extend the service life of the branch pipe 3.

[0032] In a specific implementation of this invention, when the electric arc furnace is running, the gas supplied by the external gas source enters the branch pipe 3 through the main pipe 2, and is then evenly distributed to each blowing component 4 by the branch pipe 3. The gas is conducted to the blowing nozzle 7 within the blowing head 6. Since the blowing nozzle 7 has a spiral guide channel inside, as the gas flows, the pitch of the spiral guide channel gradually decreases, causing the gas velocity to gradually increase, thereby forming an airflow with strong impact force, blowing out the dust inside the blowing nozzle 7 and preventing the blowing nozzle 7 from becoming clogged. At the same time, the inclined blowing nozzle 7 allows the airflow to be better directed towards the middle of the bottom of the furnace body 1, forming an effective stirring effect and promoting the reaction and mixing of the substances inside the furnace.

[0033] The flow regulating valve 12 can flexibly adjust the gas flow rate of the branch pipe 3 according to production needs. The filter screen 18 at the air nozzle 7 can filter out impurities in the gas and prevent blockage. The protective sleeve 10 and the corrosion-resistant filling layer 11 protect the branch pipe 3 from the influence of harsh environment. The buffer spring 15 reduces the impact of furnace body 1 vibration on the device and ensures the stable operation of the device.

[0034] The present invention and its embodiments have been described above. This description is not restrictive, and the specific embodiments shown are only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A gas blowing device for an industrial silicon smelting arc furnace, characterized in that: It includes a furnace body (1), a main pipe (2), branch pipes (3), an air blowing assembly (4), and a support and fixing mechanism; One end of the main pipe (2) is connected to multiple branch pipes (3) through a connecting pipe (5); Multiple branch pipes (3) are evenly arranged around the furnace body (1), and multiple air blowing components (4) are evenly distributed on each branch pipe (3); The air blowing assembly (4) includes an air blowing head (6) and an air blowing nozzle (7). One end of the air blowing head (6) is connected to the branch pipe (3), and the other end is detachably connected to the air blowing nozzle (7). The air blowing nozzle (7) is inclined and has a spiral guide channel inside. The supporting and fixing mechanism includes a fixed bracket (8) and multiple connecting bolts (9). The fixed bracket (8) is fitted onto the branch pipe (3) and connected to the furnace body (1) through the connecting bolts (9) to fix the branch pipe (3) so that the branch pipe (3) and the furnace body (1) maintain a relatively fixed positional relationship.

2. The gas blowing device for an industrial silicon smelting submerged arc furnace according to claim 1, characterized in that: A protective sleeve (10) is fixedly fitted on the outer wall of the branch pipe (3), and a corrosion-resistant filler layer (11) is filled between the protective sleeve (10) and the branch pipe (3). The protective sleeve (10) and the corrosion-resistant filler layer (11) can effectively protect the branch pipe (3) from the erosion of high temperature and corrosive gas in the electric arc furnace and extend the service life of the branch pipe (3).

3. The gas blowing device for an industrial silicon smelting submerged arc furnace according to claim 1, characterized in that: The branch pipe (3) is equipped with a flow regulating valve (12) for regulating the gas flow rate of each branch pipe (3). The flow regulating valve (12) can flexibly adjust different blowing flow rates according to actual production needs to adapt to different smelting process requirements and improve the controllability of blowing effect.

4. The gas blowing device for an industrial silicon smelting submerged arc furnace according to claim 1, characterized in that: The fixed bracket (8) is a support plate with a U-shaped placement groove (13). The fixed bracket (8) has mounting holes (14) on both sides. The connecting bolt (9) passes through the mounting holes (14) to fix the fixed bracket (8) to the furnace body (1). A buffer spring (15) is sleeved on the outside of the connecting bolt (9), and the buffer spring (15) is located between the furnace body (1) and the fixed bracket (8).

5. The gas blowing device for an industrial silicon smelting submerged arc furnace according to claim 4, characterized in that: The branch pipe (3) connected to one side of the air blowing head (6) is located in the U-shaped placement groove (13) of the fixed bracket (8), and the tail of the air blowing head (6) is fixedly connected to the fixed bracket (8) by fixing bolts (16).

6. The gas blowing device for an industrial silicon smelting submerged arc furnace according to claim 1, characterized in that: A sealing gasket (17) is provided at the connection between the air blowing head (6) and the branch pipe (3), which can further enhance the sealing of the connection between the air blowing head (6) and the branch pipe (3), prevent gas leakage, and improve the blowing efficiency.

7. The gas blowing device for an industrial silicon smelting submerged arc furnace according to claim 1, characterized in that: A filter screen (18) is provided at the connection between the end of the air nozzle (7) and the air head (6), and the air nozzle (7) and the air head (6) are connected by a thread to filter impurities that may be carried in the gas, so as to prevent impurities from entering the air nozzle (7) and causing blockage, and to ensure the continuity and stability of the air blowing.

8. The gas blowing device for an industrial silicon smelting submerged arc furnace according to claim 1, characterized in that: The air nozzle (7) is tilted toward the bottom center of the furnace body (1), and the pitch of the spiral guide channel inside the air nozzle (7) gradually decreases along the gas flow direction.

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