Low-carbon silicon-chromium alloy phosphorus reduction oxygen blowing device

Abstract

The utility model discloses a kind of oxygen blowing devices for low-carbon silicon-chromium alloy phosphorus reduction, more specifically related to alloy phosphorus reduction oxygen blowing technical field, including oxygen blowing bin, the oxygen blowing auxiliary device for phosphorus reduction is arranged in the inner and outer two walls of oxygen blowing bin, the oxygen blowing auxiliary device for phosphorus reduction includes: oxygen blowing connecting assembly and support adjusting component.The utility model passes through a kind of oxygen blowing devices for low-carbon silicon-chromium alloy phosphorus reduction, compared with prior art, the high-pressure oxygen flows through blast oxygen blowing head to enter oxygen blowing inner groove with Ma=1.8-2.0 supersonic jet, forms efficient three-phase coupling reaction zone on melt surface, makes phosphorus rapidly volatilize and with P2O5 form with air flow discharge, two groups of blast booster pump of upper and lower opposition eliminate low-pressure vortex in tank, ensure continuous, uniform oxygen supply, to shorten oxygen blowing time under the premise of guaranteeing safety, oxygen utilization rate is improved.

Description

Technical Field

[0001] This utility model relates to the field of oxygen blowing technology for phosphorus reduction in alloys, and more specifically, to an oxygen blowing device for phosphorus reduction using a low-carbon silicon-chromium alloy. Background Technology

[0002] When smelting low-carbon silicon-chromium alloys (such as micro-carbon, low-carbon ferrochrome, or silicon-chromium alloys), the raw materials (such as high-carbon ferrochrome or silicon-chromium alloys) often contain a certain amount of phosphorus. Phosphorus is a harmful impurity that reduces the ductility and corrosion resistance of the alloy, so its content must be controlled at an extremely low level. Existing silicon-chromium alloy phosphorus reduction oxygen blowing devices have low internal oxygen supply pressure during use, resulting in low oxygen blowing pressure, low oxygen blowing efficiency, and reduced oxygen separation integrity. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides an oxygen blowing device for reducing phosphorus in low-carbon silicon-chromium alloy, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an oxygen blowing device for reducing phosphorus in low-carbon silicon-chromium alloy, comprising an oxygen blowing chamber, wherein the inner and outer walls of the oxygen blowing chamber are provided with an auxiliary oxygen blowing device for reducing phosphorus, the auxiliary oxygen blowing device for reducing phosphorus includes: an oxygen blowing connection assembly and a support and adjustment assembly, wherein the support and adjustment assembly is disposed on the side of the oxygen blowing connection assembly, and the oxygen blowing connection assembly is disposed on the inner and outer walls of the oxygen blowing chamber.

[0005] In a preferred embodiment, the oxygen blowing connection assembly includes: a feed pipe, a discharge pipe, an oxygen blowing inner tank, a blower head, and a connecting joint. The front end of the connecting joint is installed at the rear end of the blower head, and the front end of the blower head penetrates through the inner and outer walls of the side of the oxygen blowing chamber.

[0006] In a preferred embodiment, the support adjustment assembly includes: support legs, movable universal casters, assembly connecting blocks, blower booster pumps, oxygen supply connectors, oxygen exhaust connectors, and a transmission sealed tank. The blower booster pumps are provided in two sets, and the two sets of blower booster pumps are respectively installed at the upper and lower ends inside the transmission sealed tank.

[0007] In a preferred embodiment, the upper end of the oxygen blowing chamber is installed at the lower end of the feed pipe, one end of the discharge pipe is installed on the side of the oxygen blowing chamber, and the oxygen blowing inner tank is opened inside the oxygen blowing chamber.

[0008] In a preferred embodiment, the rear end of the oxygen venting connector is installed on the inner and outer walls of the upper end of the transmission sealed tank, and the front end of the oxygen venting connector is installed on the rear end of the connecting connector.

[0009] In a preferred embodiment, the lower end of the support leg is mounted on the upper end of the movable universal roller, and the inner side of the upper end of the support leg is mounted on the outer wall of the side of the assembly connecting block.

[0010] In a preferred embodiment, the inner side of the assembly connecting block is detachably installed on the outer wall of the lower side of the transmission sealed tank, and the upper end of the oxygen supply connector is installed inside the lower end of the transmission sealed tank.

[0011] The technical effects and advantages of this utility model are as follows: An oxygen blowing device for reducing phosphorus in low-carbon silicon-chromium alloys, compared with the prior art, features a high-pressure oxygen flow that enters the oxygen blowing tank at a supersonic speed of Ma=1.8–2.0 through a blower head, forming a highly efficient three-phase coupled reaction zone on the surface of the melt. This allows phosphorus to volatilize rapidly and be discharged in the form of P2O5 with the airflow. Two sets of blower booster pumps positioned vertically and vertically eliminate low-pressure eddies in the tank, ensuring continuous and uniform oxygen supply. This shortens the oxygen blowing time and improves oxygen utilization while ensuring safety. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the oxygen blowing auxiliary device for phosphorus reduction according to this utility model.

[0014] Figure 3 This is a schematic diagram of the oxygen blowing connection assembly of this utility model.

[0015] Figure 4 This is a schematic diagram of the support and adjustment component structure of this utility model.

[0016] The attached figures are labeled as follows: 1. Oxygen blowing chamber; 2. Auxiliary oxygen blowing device for phosphorus reduction; 21. Oxygen blowing connection assembly; 211. Inner oxygen blowing tank; 212. Feed pipe; 213. Discharge pipe; 214. Connecting joint; 215. Blower oxygen blowing head; 22. Support and adjustment assembly; 221. Oxygen exhaust joint; 222. Transfer sealing tank; 223. Oxygen supply joint; 224. Blower pump; 225. Support legs; 226. Assembly connecting block; 227. Movable universal casters. Detailed Implementation

[0017] 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.

[0018] As attached Figure 1-4 As shown, this utility model provides an oxygen blowing device for reducing phosphorus in low-carbon silicon-chromium alloy, including an oxygen blowing chamber 1. The oxygen blowing chamber 1 has an auxiliary oxygen blowing device 2 for reducing phosphorus on its inner and outer walls. The auxiliary oxygen blowing device 2 for reducing phosphorus includes an oxygen blowing connection component 21 and a support and adjustment component 22. The support and adjustment component 22 is disposed on the side of the oxygen blowing connection component 21, and the oxygen blowing connection component 21 is disposed on the inner and outer walls of the oxygen blowing chamber 1.

[0019] The oxygen blowing connection assembly 21 includes: a feed pipe 212, a discharge pipe 213, an oxygen blowing inner tank 211, a blower head 215, and a connecting joint 214. The front end of the connecting joint 214 is installed at the rear end of the blower head 215. The front end of the blower head 215 penetrates the inner and outer walls of the side of the oxygen blowing chamber 1. The upper end of the oxygen blowing chamber 1 is installed at the lower end of the feed pipe 212. One end of the discharge pipe 213 is installed on the side of the oxygen blowing chamber 1. The oxygen blowing inner tank 211 is opened inside the oxygen blowing chamber 1.

[0020] The support adjustment assembly 22 includes: support legs 225, movable universal rollers 227, assembly connecting block 226, blower booster pump 224, oxygen supply connector 223, oxygen exhaust connector 221, and transmission sealed tank 222. Two sets of blower booster pumps 224 are provided, and the two sets of blower booster pumps 224 are respectively installed at the upper and lower ends inside the transmission sealed tank 222. The rear end of the oxygen exhaust connector 221 is installed on the inner and outer walls of the upper end of the transmission sealed tank 222, and the front end of the oxygen exhaust connector 221 is installed on the rear end of the connecting connector 214. The lower end of the support legs 225 is installed on the upper end of the movable universal rollers 227. The inner side of the upper end of the support legs 225 is installed on the outer side wall of the assembly connecting block 226. The inner side of the assembly connecting block 226 is detachably installed on the outer side wall of the lower end of the transmission sealed tank 222. The upper end of the oxygen supply connector 223 is installed at the lower end inside the transmission sealed tank 222.

[0021] The specific implementation method is as follows: When using this utility model, the design pressure of the transmission sealing tank 222 is 1.3 × rated outlet pressure, i.e., P_design = 1.3 × B bar; the burst pressure is ≥3 × P_design; the geometric volume tolerance is ±2%; the inner wall roughness Ra ≤ 0.8 µm, reducing oxygen flow friction loss. The blower booster pump 224 has the following characteristics: speed: 2900 rpm (50 Hz) or 3500 rpm (60 Hz); efficiency: ≥72% (isentropic efficiency); bearing temperature rise: ≤45 K; flow pulsation: ≤±3% (using a dual-pump counter-current system to cancel pulsation); the blower oxygen head 215 is made of Inconel 625, with a temperature resistance of 1100 ℃; the nozzle contraction angle is 30°±1°; the outlet Mach number is Ma = 1.8–2.0; and the maximum allowable heat load is q_max = 2.5 MW·m. -2First, the transfer sealed container 222 needs to be assembled using the support legs 225 at its lower end. After the upper end of the support legs 225 is assembled, it can be moved and transferred using the omnidirectional casters 227 at its lower end. After the omnidirectional casters 227 have moved it, the transfer sealed container 222 can be moved to the side of the oxygen blowing chamber 1 and connected to the blower head 215 and connecting connector 214 at the upper end of the side of the oxygen blowing chamber 1. After the blower head 215 completes a double-cone quick-fit seal with the oxygen exhaust connector 221 through the connecting connector 214, the blower booster pump 224 stably increases the oxygen pressure in the transfer sealed container 222 to 0.75–0.90 within 0.8 seconds. MPa; The high-pressure oxygen flows through the blower head 215 and enters the oxygen blowing tank 211 at a supersonic speed of Ma=1.8–2.0, forming a highly efficient three-phase coupled reaction zone on the surface of the melt, causing phosphorus to volatilize rapidly and be discharged with the airflow in the form of P2O5. The two sets of blower booster pumps 224 placed vertically eliminate the low-pressure eddies in the tank, ensuring continuous and uniform oxygen supply, thereby shortening the oxygen blowing time and improving the oxygen utilization rate while ensuring safety.

[0022] The working principle of this utility model is as follows: When using this utility model, the transmission sealing tank 222 needs to be assembled first using the support bracket 225 set at the lower end. After the upper end of the support bracket 225 is assembled, it can be moved and transferred using the movable universal roller 227 set at the lower end. After the movable universal roller 227 is moved, the transmission sealing tank 222 can be transferred to the side of the oxygen blowing chamber 1 and connected to the blower oxygen head 215 and the connecting joint 214 set at the upper end of the side of the oxygen blowing chamber 1. After the blower oxygen head 215, the connecting joint 214 and the oxygen exhaust joint 221 are connected, a stable oxygen supply blowing operation can be achieved.

[0023] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An oxygen blowing device for reducing phosphorus in low-carbon silicon-chromium alloy, comprising an oxygen blowing chamber (1), characterized in that: The oxygen blowing chamber (1) is equipped with an oxygen blowing auxiliary device (2) for phosphorus reduction on both its inner and outer walls; The oxygen blowing auxiliary device (2) for phosphorus reduction includes: an oxygen blowing connection assembly (21) and a support adjustment assembly (22). The support adjustment assembly (22) is located on the side of the oxygen blowing connection assembly (21), and the oxygen blowing connection assembly (21) is located on the inner and outer walls of the oxygen blowing chamber (1).

2. The oxygen blowing device for reducing phosphorus in low-carbon silicon-chromium alloy according to claim 1, characterized in that: The oxygen blowing connection assembly (21) includes: a feed pipe (212), a discharge pipe (213), an oxygen blowing inner tank (211), a blower oxygen blowing head (215), and a connecting joint (214). The front end of the connecting joint (214) is installed at the rear end of the blower oxygen blowing head (215), and the front end of the blower oxygen blowing head (215) penetrates the inner and outer walls of the side of the oxygen blowing chamber (1).

3. The oxygen blowing device for reducing phosphorus in low-carbon silicon-chromium alloy according to claim 2, characterized in that: The support adjustment assembly (22) includes: support legs (225), movable universal casters (227), assembly connecting block (226), blower booster pump (224), oxygen supply connector (223), oxygen exhaust connector (221), and transmission sealed tank (222). The blower booster pump (224) is provided in two sets, and the two sets of blower booster pumps (224) are respectively installed at the upper and lower ends inside the transmission sealed tank (222).

4. The oxygen blowing device for phosphorus reduction using low-carbon silicon-chromium alloy according to claim 2, characterized in that: The upper end of the oxygen blowing chamber (1) is installed at the lower end of the feed pipe (212), one end of the discharge pipe (213) is installed on the side of the oxygen blowing chamber (1), and the oxygen blowing inner tank (211) is opened inside the oxygen blowing chamber (1).

5. The oxygen blowing device for reducing phosphorus in low-carbon silicon-chromium alloy according to claim 3, characterized in that: The rear end of the oxygen venting connector (221) is installed on the inner and outer walls of the upper end of the transmission sealed tank (222), and the front end of the oxygen venting connector (221) is installed on the rear end of the connecting connector (214).

6. The oxygen blowing device for reducing phosphorus in low-carbon silicon-chromium alloy according to claim 3, characterized in that: The lower end of the support leg (225) is mounted on the upper end of the movable universal roller (227), and the inner side of the upper end of the support leg (225) is mounted on the outer side wall of the assembly connecting block (226).

7. The oxygen blowing device for phosphorus reduction using low-carbon silicon-chromium alloy according to claim 3, characterized in that: The inner side of the assembly connecting block (226) is detachably installed on the outer wall of the lower side of the transmission sealing tank (222), and the upper end of the oxygen supply connector (223) is installed inside the lower end of the transmission sealing tank (222).

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