Silicon-chromium alloy oxygen blowing carbon reduction device

Abstract

This application discloses a silicon-chromium alloy oxygen blowing and carbon reduction device, including a conveying gun body, a connecting mechanism, and an oxygen delivery nozzle. The oxygen delivery nozzle has an oxygen nozzle at its end, and the conveying gun body has an oxygen delivery port. The connecting mechanism, through a connecting shell, a water guide groove, a limiting rod, an adjusting spring, and a screw, enables rapid positioning, fastening, and disassembly of the oxygen delivery nozzle and the conveying gun body, with zero coolant leakage during assembly and disassembly. The oxygen delivery nozzle uses a double-layered nested steel pipe to form a coolant chamber, which, together with a water delivery pipe and a drain pipe, constructs a circulating cooling circuit, effectively reducing the high-temperature heat load. The conveying gun body has a three-layered nested steel pipe structure, independently forming an oxygen delivery chamber, a water delivery chamber, and a drain chamber, achieving independent delivery of oxygen and coolant and avoiding cross-contamination. Furthermore, the pre-tightening assembly enhances connection stability through spring force. This device has advantages such as reliable connection, efficient cooling, and convenient maintenance, improving the stability of the silicon-chromium alloy oxygen blowing and carbon reduction process and extending equipment lifespan.

Description

Technical Field

[0001] This application belongs to the field of alloy smelting technology, and specifically relates to a silicon-chromium alloy oxygen blowing and carbon reduction device. Background Technology

[0002] Silicon-chromium alloys are important metallurgical raw materials, and their smelting process often requires oxygen blowing to reduce carbon content and improve alloy quality. In existing technologies, oxygen blowing devices for silicon-chromium alloys mainly consist of a conveying lance, an oxygen injection pipe, and connecting structures. Oxygen is injected into the furnace through an oxygen injection head to promote the carbon reduction reaction. However, such devices have the following problems in practical applications:

[0003] Traditional oxygen delivery nozzles are often directly bolted to the delivery gun body or simply snapped together. In high-temperature environments, this can easily lead to loosening due to thermal expansion, making it difficult to guarantee a proper seal. Furthermore, installation requires repeated adjustments to the positioning, disassembly is cumbersome, and maintenance efficiency is low. Additionally, coolant leakage is common during disassembly, posing a safety hazard. Moreover, since the oxygen delivery nozzle is constantly exposed to the high-temperature furnace environment, it is prone to deformation or even damage due to thermal stress if not cooled promptly.

[0004] Therefore, there is an urgent need for a silicon-chromium alloy oxygen blowing carbon reduction device that is easy to connect, reliable, and has high cooling efficiency, in order to solve the problems of maintenance difficulties and insufficient cooling in the existing technology. Utility Model Content

[0005] This application provides a silicon-chromium alloy oxygen blowing carbon reduction device, which solves the problems of inconvenient replacement and insufficient cooling in the prior art by optimizing the connection structure and improving the efficiency of the cooling system, thereby ensuring the stability and safety of the device in high-temperature environments, extending its service life and improving production efficiency.

[0006] To achieve the above objectives, this application provides a silicon-chromium alloy oxygen blowing and carbon reduction device, including a conveying gun body, a connecting mechanism, and an oxygen delivery nozzle. The conveying gun body and the oxygen delivery nozzle are connected by the connecting mechanism. An oxygen injection head is fixedly installed at the end of the oxygen delivery nozzle that is away from the conveying gun body, and an oxygen delivery port is provided at the end of the conveying gun body that is away from the oxygen delivery nozzle.

[0007] The connecting mechanism includes a connecting shell, which is fixedly sleeved on one end of the oxygen delivery nozzle near the delivery gun body. Two water guide grooves are symmetrically opened inside the connecting shell. A vertical chamber is set in each of the two water guide grooves. A top column is fixedly installed on the inner wall of the vertical chamber. The water guide grooves are connected to the pipe wall of the oxygen delivery nozzle.

[0008] The connecting mechanism also includes two limiting rods, which are slidably mounted on the connecting shell through the corresponding water guide groove. An adjusting spring is provided between the top of the limiting rod and the surface of the connecting shell.

[0009] An installation tube compartment is fixedly opened at one end of the conveyor gun body near the water guide channel. The water guide channel is slidably connected to the installation tube compartment at one end of the conveyor gun body. A fixed seat is fixedly installed inside the installation tube compartment. A valve body is slidably installed coaxially inside the fixed seat. A compression spring is installed between the valve body and the fixed seat. A sealing limit slide valve is installed at the end of the installation tube compartment near the vertical compartment. A limit groove is opened around the circumference of the sealing limit slide valve.

[0010] In one embodiment, the connecting shell is provided with a connecting seat on the side near the conveying gun body, and a screw is provided in the connecting seat. The conveying gun body is provided with a threaded seat on the side near the oxygen delivery nozzle.

[0011] In one embodiment, the oxygen delivery nozzle is composed of two nested steel pipes. The inner steel pipe forms the oxygen delivery pipe, and the outer steel pipe has a fixed shell on its surface. A coolant tank is formed between the two steel pipes. A connecting shell is fixedly sleeved on the outer surface of the shell, and the coolant tank is connected to the water guide channel.

[0012] In one embodiment, the oxygen delivery nozzle further includes a water supply pipe and a drain pipe. One end of the water supply pipe passes through the housing and is connected to the end of the coolant tank near the oxygen delivery head, and the other end of the water supply pipe is connected to the lower water guide groove. One end of the drain pipe passes through the housing and is connected to the end of the coolant tank near the connecting shell, and the other end of the drain pipe is connected to the upper water guide groove.

[0013] In one embodiment, the delivery gun body is composed of three nested steel pipes. The three steel pipes are fixed by connecting valve sleeves and connecting rings on both sides. The inner steel pipe forms an oxygen delivery chamber, the inner steel pipe and the middle steel pipe form a water delivery chamber, and the middle steel pipe and the outer steel pipe form a drainage chamber. A threaded seat is provided on the side of the connecting ring near the oxygen delivery nozzle.

[0014] In one embodiment, both the water guide chamber and the drainage chamber are provided with connecting pipes at the end near the oxygen delivery nozzle, and the connecting pipes are also fixedly connected to the installation pipe chamber.

[0015] In one embodiment, a water outlet and a water inlet are provided on the connecting valve sleeve. The water outlet is connected to the drainage chamber, and the water inlet is connected to the water guiding chamber. An oxygen supply port is provided on the connecting valve sleeve, and the oxygen supply port is connected to the oxygen guiding chamber.

[0016] In one embodiment, the delivery gun body further includes a pre-tightening assembly, which includes a fixing ring and a pre-tightening slide. The fixing ring is fixedly disposed inside the oxygen delivery chamber, and the pre-tightening slide is slidably disposed at one end of the oxygen delivery chamber near the oxygen delivery nozzle. A pre-tightening spring is disposed between the pre-tightening slide and the fixing ring.

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] 1. Safe and convenient connection structure with high maintenance efficiency: The connection mechanism, through the design of limit rods, adjusting springs, sealing limit valves, and inclined guide grooves, enables rapid and accurate positioning, fastening, and disassembly of the oxygen delivery nozzle and the delivery gun body. During installation, the limit rod automatically engages with the limit groove to complete the initial positioning. After the screw is tightened, the seal is released and the coolant is connected. During disassembly, the reverse operation automatically cuts off the coolant passage, ensuring zero leakage throughout the process. The inclined guide groove also prevents jamming, improving equipment maintenance efficiency.

[0019] 2. Highly efficient and reliable cooling system, extending service life: The oxygen delivery nozzle adopts a double-layer steel pipe nested structure to form a coolant tank, which, together with the water supply pipe, drainage pipe, and the water guide tank and drainage tank of the delivery nozzle body, constructs a highly efficient circulating cooling circuit. After absorbing heat near the oxygen nozzle, the coolant flows back, effectively reducing the heat load of the oxygen delivery nozzle in high-temperature environments, alleviating thermal stress damage, significantly extending the service life of the equipment, and improving operational stability.

[0020] 3. Pre-tightening design strengthens the connection and ensures stable and long-lasting operation: The pre-tightening assembly, through the cooperation of the fixing ring, pre-tightening slide and pre-tightening spring, generates elasticity during connection to ensure that the oxygen delivery nozzle and the delivery gun body fit tightly together, effectively preventing loosening caused by thermal expansion under high temperature environment, and further improving connection reliability and equipment operating durability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the silicon-chromium alloy oxygen blowing and carbon reduction device provided in this application;

[0023] Figure 2 A cross-sectional schematic diagram of the silicon-chromium alloy oxygen blowing decarbonization device provided in this application;

[0024] Figure 3 An enlarged schematic diagram of point C of the silicon-chromium alloy oxygen blowing decarbonization device provided in this application;

[0025] Figure 4 An enlarged schematic diagram of point A in the oxygen blowing and carbon reduction device for silicon-chromium alloy provided in this application;

[0026] Figure 5 A schematic diagram of the conveyor gun body structure of the silicon-chromium alloy oxygen blowing and carbon reduction device provided in this application;

[0027] Figure 6 An enlarged schematic diagram of section B of the silicon-chromium alloy oxygen blowing decarbonization device provided in this application;

[0028] Figure 7 This is an enlarged schematic diagram of point D in the silicon-chromium alloy oxygen blowing and carbon reduction device provided in this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Conveyor body; 2. Connecting mechanism; 21. Connecting shell; 22. Water guide channel; 23. Limiting rod; 24. Adjusting spring; 25. Fixing seat; 26. Valve body; 27. Compression spring; 28. Top column; 29. ​​Sealing limit slide valve; 210. Vertical compartment; 3. Oxygen delivery nozzle; 31. Shell; 32. Coolant compartment; 33. Water delivery pipe; 34. Drainage pipe; 35. Oxygen delivery pipe; 4. Water inlet; 5. Oxygen delivery port; 6. Water outlet; 7. Connecting ring; 8. Oxygen nozzle; 9. Pre-tightening assembly; 91. Fixing ring; 92. Pre-tightening spring; 93. Pre-tightening slide; 101. Connecting valve sleeve; 102. Drainage compartment; 103. Water guide compartment; 104. Oxygen delivery compartment; 106. Connecting pipe; 107. Installation pipe compartment; 10. Connecting seat; 11. Screw; 12. Threaded seat. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0031] See Figures 1 to 7 As shown, the silicon-chromium alloy oxygen blowing and carbon reduction device provided in this application includes a conveying gun body 1, a connecting mechanism 2, and an oxygen delivery nozzle 3. The conveying gun body 1 and the oxygen delivery nozzle 3 are connected by the connecting mechanism 2. An oxygen spray head 8 is fixedly installed at the end of the oxygen delivery nozzle 3 away from the conveying gun body 1, and an oxygen delivery port 5 is provided at the end of the conveying gun body 1 away from the oxygen delivery nozzle 3.

[0032] During the carbon reduction refining process of silicon-chromium alloy, the conveying gun body 1 is fixed to the surface of the converter by bolts or welding, and the oxygen supply pipe 3 is tightly connected to the conveying gun body 1 by means of the connecting mechanism 2, and ensures that the oxygen injection head 8 is accurately aligned with the silicon-chromium alloy reaction zone inside the furnace.

[0033] The oxygen inlet 5 outside the converter is connected to the oxygen supply system via an oxygen supply pipeline, while the delivery lance 1 is connected to the coolant supply system. This ensures that the oxygen delivery nozzle 3 can continuously and stably inject oxygen through the oxygen injection head 8 in the high-temperature furnace environment, while simultaneously achieving circulating cooling of the oxygen delivery nozzle 3, thereby improving its service life and operational stability.

[0034] The connecting mechanism 2 includes a connecting shell 21, which is fixedly sleeved on one end of the oxygen delivery nozzle 3 near the delivery gun body 1. Two water guide grooves 22 are symmetrically opened inside the connecting shell 21. A vertical chamber 210 is provided in each of the two water guide grooves 22. A top column 28 is fixedly installed on the inner wall of the vertical chamber 210. The water guide grooves 22 are connected to the pipe wall of the oxygen delivery nozzle 3.

[0035] The connecting mechanism 2 also includes two limiting rods 23, which are slidably disposed on the connecting shell 21 through the water guide groove 22. An adjusting spring 24 is provided between the top of the limiting rod 23 and the surface of the connecting shell 21.

[0036] The conveyor gun body 1 has an installation tube compartment 107 fixedly opened at one end near the water guide channel 22. The water guide channel 22 is slidably connected to the installation tube compartment 107 at one end near the conveyor gun body 1. A fixed seat 25 is fixedly installed inside the installation tube compartment 107. A valve body 26 is slidably installed coaxially inside the fixed seat 25. A compression spring 27 is installed between the valve body 26 and the fixed seat 25. A sealing limit slide valve 29 is installed at the end of the installation tube compartment 107 near the vertical compartment 210. A limit groove is opened around the circumference of the sealing limit slide valve 29.

[0037] When connecting the oxygen delivery nozzle 3 to the delivery gun body 1, the worker manually holds the oxygen delivery nozzle 3 and moves it near the delivery gun body 1, aligning the water guide groove 22 inside the connecting housing 21 with the installation tube compartment 107 connected to the delivery gun body 1. As the installation tube compartment 107 is gradually inserted into the water guide groove 22, the sealing limit valve 29 tightly adheres to the inner wall of the water guide groove 22, forming a preliminary seal. During the sliding process of the sealing limit valve 29, the limiting groove on it moves synchronously. Just before the limiting groove reaches a specific position, the limiting rod 23 is first pushed up by the sealing limit valve 29, causing the adjusting spring 24 to be stretched. When the limiting groove slides to the specific position, the limiting rod 23 automatically resets under the elastic force of the adjusting spring 24, and its end is inserted into the limiting groove, completing the installation and positioning. During this process, an axial pressure is formed between the oxygen delivery nozzle 3 and the delivery gun body 1, which effectively maintains the stability of the connection between the two.

[0038] When cooling of the oxygen delivery nozzle 3 is required, the sealing limit valve 29 is pushed further towards the vertical chamber 210. When the top column 28 contacts the valve body 26, the mounting tube chamber 107 continues to move towards the top column 28, causing the top column 28 to squeeze the valve body 26. The valve body 26 then moves towards the fixed seat 25, releasing its seal with the sealing limit valve 29, thus connecting the mounting tube chamber 107 to the water guide trough 22. The mounting tube chamber 107 is connected to the coolant supply system, allowing coolant to flow from the delivery gun body 1 through the mounting tube chamber 107 and the water guide trough 22 to the oxygen delivery nozzle 3, effectively cooling the oxygen delivery nozzle 3 in high-temperature operating environments, extending equipment service life and improving operational safety.

[0039] When the oxygen delivery nozzle 3 needs to be disassembled, the drive connecting shell 21 is smoothly moved away from the delivery gun body 1, causing the installation tube groove 107 to gradually exit from the water guide groove 22. At the same time, the compression spring 27 is released, pushing the valve body 26 to reset and re-forming an effective seal with the sealing limit slide valve 29, completely cutting off the coolant passage and preventing coolant leakage during disassembly. This process is convenient and safe.

[0040] When the limiting groove re-engages the limiting rod 23, it prevents the oxygen delivery nozzle 3 from being directly ejected due to the axial pressure generated inside the delivery gun body 1. At this time, pulling the limiting rod 23 outward away from the connecting shell 21 disengages it from the limiting groove, allowing the oxygen delivery nozzle 3 to be smoothly pulled out of the gun body, completing the disassembly. This design ensures the stability and safety of the assembly and disassembly process and improves equipment maintenance efficiency.

[0041] Both the limiting groove and the limiting rod 23 are provided with inclined guide grooves on opposite sides. This design can guide the limiting rod 23 to smoothly disengage from the limiting groove, effectively avoiding jamming and further improving the smoothness of operation.

[0042] Optionally, the connecting shell 21 is provided with a connecting seat 10 on the side near the conveying gun body 1, and a screw 11 is provided in the connecting seat 10. The conveying gun body 1 is provided with a threaded seat 12 on the side near the oxygen delivery nozzle 3.

[0043] In this embodiment, after the limiting rod 23 is inserted into the limiting groove, the screw 11 is screwed into the threaded seat 12 to further tighten the connecting seat 10 so that it is tightly connected with the conveying gun body 1. This ensures that the connection after being tightened by the screw 11 and the threaded seat 12 is more secure, preventing loosening due to thermal expansion under high temperature conditions, and improving the sealing performance and overall structural durability.

[0044] During the process of fastening the screw 11 to the threaded seat 12, the rotation of the screw 11 causes the connecting seat 10 to gradually move closer to the conveying gun body 1. As the distance between the two shortens, the limiting groove is released from the constraint of the limiting rod 23, and then the sealing limiting slide valve 29 can be pushed to move further towards the vertical chamber 210.

[0045] When it is necessary to disassemble the oxygen delivery nozzle 3, first rotate the screw 11 in the reverse direction to drive the connecting seat 10 to move smoothly away from the delivery gun body 1, thereby moving the connecting shell 21 away from the delivery gun body 1, so that the installation tube groove 107 gradually exits from the water guide groove 22. When the screw 11 is completely unscrewed, the limiting groove will re-engage the limiting rod 23.

[0046] Optionally, the oxygen delivery nozzle 3 is composed of two nested steel pipes. The inner steel pipe forms the oxygen delivery pipe 35, and the outer steel pipe has a fixed shell 31. The space between the two steel pipes forms a coolant tank 32. The connecting shell 21 is fixedly sleeved on the outer surface of the shell 31. The coolant tank 32 is connected to the water guide channel 22.

[0047] In this embodiment, the coolant enters the coolant tank 32 through the connecting pipe 107 and the water guide trough 22, circulates in the tank and absorbs the heat from the converter acting on the oxygen supply nozzle 3.

[0048] Optionally, the oxygen delivery nozzle 3 also includes a water supply pipe 33 and a drain pipe 34. One end of the water supply pipe 33 passes through the housing 31 and is connected to the end of the coolant tank 32 near the oxygen nozzle 8, and the other end of the water supply pipe 33 is connected to the lower water guide groove 22. One end of the drain pipe 34 passes through the housing 31 and is connected to the end of the coolant tank 32 near the connecting housing 21, and the other end of the drain pipe 34 is connected to the upper water guide groove 22.

[0049] In this embodiment, the coolant inside the delivery nozzle 1 enters the coolant tank 32 via the lower water guide trough 22 and the water supply pipe 33. It circulates within the tank, absorbing the heat exerted on the oxygen delivery nozzle 3 by the converter, and finally flows back to the upper water guide trough 22 through the drain pipe 34, re-entering the delivery nozzle 1. This efficient cooling circuit ensures the oxygen delivery nozzle 3 operates stably and continuously in high-temperature environments, extending its service life and improving its working efficiency. The continuous circulation of coolant not only efficiently controls the temperature but also effectively mitigates thermal stress damage to the equipment, significantly enhancing system reliability and durability.

[0050] Optionally, the delivery gun body 1 is composed of three nested steel pipes. The three steel pipes are fixed to the connecting ring 7 by connecting valve sleeves 101 on both sides. The inner steel pipe forms the oxygen delivery chamber 104, the inner steel pipe and the middle steel pipe form the water delivery chamber 103, and the middle steel pipe and the outer steel pipe form the drainage chamber 102. Both the water delivery chamber 103 and the drainage chamber 102 are provided with connecting pipes 106 at the end near the oxygen delivery nozzle 3. The connecting pipes 106 are also fixedly connected to the installation pipe compartment 107. Specifically, the threaded seat 12 is located on the side of the connecting ring 7 near the oxygen delivery nozzle 3.

[0051] In this embodiment, the three-layer structure design of the conveyor body 1 not only enhances the overall rigidity and optimizes the coolant flow path, but also ensures that each compartment functions independently and works together efficiently, effectively dispersing the heat load, thereby improving the stability and safety of the equipment in high-temperature environments and extending its service life.

[0052] Optionally, the connecting valve sleeve 101 is provided with an outlet 6 and an inlet 4. The outlet 6 is connected to the drainage chamber 102, and the inlet 4 is connected to the water guiding chamber 103. The connecting valve sleeve 101 is provided with an oxygen supply port 5, which is connected to the oxygen guiding chamber 104.

[0053] In this embodiment, the structural design enables independent delivery of coolant and oxygen, as well as independent delivery of incoming and outgoing coolant, effectively preventing cross-contamination and improving operational safety and production efficiency.

[0054] After the conveyor lance 1 is connected to the oxygen delivery nozzle 3, the oxygen prepared by the oxygen supply system enters the oxygen delivery chamber 104 through the oxygen delivery port 5. The oxygen in the oxygen delivery chamber 104 is transported to the oxygen injection head 8 under the guidance of the oxygen delivery pipe 35. The oxygen injection head 8 injects the oxygen into the converter at high speed and high pressure, ensuring the stability and efficiency of the carbon reduction process in smelting.

[0055] Optionally, the delivery gun body 1 also includes a pre-tightening assembly 9, which includes a fixing ring 91 and a pre-tightening slide 93. The fixing ring 91 is fixedly installed in the oxygen delivery chamber 104, and the pre-tightening slide 93 is slidably installed at one end of the oxygen delivery chamber 104 near the oxygen delivery nozzle 3. A pre-tightening spring 92 is provided between the pre-tightening slide 93 and the fixing ring 91.

[0056] In this embodiment, when the delivery gun body 1 and the oxygen delivery nozzle 3 are initially connected, the connecting shell 21 contacts the pre-tightening slide 93, pushing the pre-tightening slide 93 to move into the oxygen delivery chamber 104, further compressing the pre-tightening spring 92. When the limiting groove and the limiting rod 23 abut against each other, the elastic force generated by the pre-tightening spring 92 ensures that the connecting shell 21 and the oxygen delivery nozzle 3 are tightly fitted, effectively preventing loosening and enhancing connection stability.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A silicon-chromium alloy oxygen blowing decarburization device, characterized by: It includes a conveying gun body (1), a connecting mechanism (2), and an oxygen delivery nozzle (3). The conveying gun body (1) and the oxygen delivery nozzle (3) are connected by the connecting mechanism (2). An oxygen delivery head (8) is fixedly provided at the end of the oxygen delivery nozzle (3) away from the conveying gun body (1). An oxygen delivery port (5) is provided at the end of the conveying gun body (1) away from the oxygen delivery nozzle (3). The connecting mechanism (2) includes a connecting shell (21), which is fixedly sleeved on one end of the oxygen delivery nozzle (3) near the delivery gun body (1). Two water guide grooves (22) are symmetrically opened inside the connecting shell (21). A vertical chamber (210) is provided in each of the two water guide grooves (22). A top column (28) is fixedly installed on the inner wall of the vertical chamber (210). The water guide grooves (22) are connected to the pipe wall of the oxygen delivery nozzle (3). The connecting mechanism (2) also includes two limiting rods (23), which are slidably disposed on the connecting shell (21) through the water guide groove (22) and the top of the limiting rod (23) is provided with an adjusting spring (24) between it and the surface of the connecting shell (21). The conveying gun body (1) has an installation tube compartment (107) fixedly opened at one end near the water guide channel (22). The water guide channel (22) is slidably connected to the installation tube compartment (107) at one end near the conveying gun body (1). A fixed seat (25) is fixedly installed inside the installation tube compartment (107). A valve body (26) is slidably installed coaxially inside the fixed seat (25). A compression spring (27) is installed between the valve body (26) and the fixed seat (25). A sealing limit slide valve (29) is installed at the end of the installation tube compartment (107) near the vertical compartment (210). The sealing limit slide valve (29) has a limit groove opened around its circumference.

2. The silicon-chromium alloy oxygen blowing decarburization device according to claim 1, characterized by: The connecting shell (21) has a connecting seat (10) on the side near the conveying gun body (1), and a screw (11) is provided in the connecting seat (10). The conveying gun body (1) has a threaded seat (12) on the side near the oxygen delivery nozzle (3).

3. The silicon-chromium alloy oxygen blowing decarburization device according to claim 1, characterized by: The oxygen delivery nozzle (3) is composed of two nested steel pipes. The inner steel pipe forms the oxygen delivery pipe (35), and the outer steel pipe has a fixed shell (31) on its surface. The two steel pipes form a coolant tank (32). The connecting shell (21) is fixedly sleeved on the outer surface of the shell (31). The coolant tank (32) is connected to the water guide channel (22).

4. The silicon-chromium alloy oxygen blowing decarburization device according to claim 3, characterized by: The oxygen delivery nozzle (3) also includes a water supply pipe (33) and a drain pipe (34). One end of the water supply pipe (33) passes through the housing (31) and is connected to the end of the coolant tank (32) near the oxygen nozzle (8). The other end of the water supply pipe (33) is connected to the lower water guide groove (22). One end of the drain pipe (34) passes through the housing (31) and is connected to the end of the coolant tank (32) near the connecting shell (21). The other end of the drain pipe (34) is connected to the upper water guide groove (22).

5. The silicon-chromium alloy oxygen blowing decarburization device according to any one of claims 1 to 4, characterized in that: The conveying gun body (1) is composed of three layers of steel pipes nested together. The three layers of steel pipes are fixed by connecting valve sleeves (101) and connecting rings (7) on both sides. The inner layer of steel pipe forms an oxygen-conducting chamber (104), the inner layer of steel pipe and the middle layer of steel pipe form a water-conducting chamber (103), and the middle layer of steel pipe and the outer layer of steel pipe form a drainage chamber (102).

6. The silicon-chromium alloy oxygen blowing decarburization apparatus according to claim 5, characterized by: Both the water guide chamber (103) and the drainage chamber (102) are provided with connecting pipes (106) at one end near the oxygen delivery nozzle (3), and the connecting pipes (106) are also fixedly connected to the installation pipe chamber (107).

7. The silicon-chromium alloy oxygen blowing decarburization apparatus according to claim 6, characterized by: The connecting valve sleeve (101) is provided with an outlet (6) and an inlet (4). The outlet (6) is connected to the drainage chamber (102), and the inlet (4) is connected to the water guiding chamber (103). The connecting valve sleeve (101) is provided with an oxygen supply port (5), and the oxygen supply port (5) is connected to the oxygen guiding chamber (104).

8. The silicon-chromium alloy oxygen blowing carbon reduction device according to claim 6, characterized in that: The delivery gun body (1) also includes a pre-tightening assembly (9), which includes a fixing ring (91) and a pre-tightening slide (93). The fixing ring (91) is fixedly installed in the oxygen delivery chamber (104), and the pre-tightening slide (93) is slidably installed at one end of the oxygen delivery chamber (104) near the oxygen delivery nozzle (3). A pre-tightening spring (92) is provided between the pre-tightening slide (93) and the fixing ring (91).

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