Ladle vulcanization spray gun device

Abstract

The utility model belongs to the technical field of equipment for producing low nickel matte through nickel-iron alloy steel ladle vulcanization, and relates to a steel ladle vulcanization spray gun device. The blowing pipe is arc-shaped, the front portion of the blowing pipe is wrapped with refractory materials, the blowing pipe is connected with the support, the lower portion of the support is connected with the rotating shaft, and the rotating shaft is connected with the driving device. The main body of the blowing pipe is arc-shaped, and the motion trail of the blowing pipe is arc-shaped, so that the mounting height of the flue gas collecting hood can be reduced to the greatest extent, the recovery of pollution gases such as sulfur dioxide and dust is facilitated, the purpose of environmental governance is achieved, and the flue gas capture rate is more than 95% at the moment. And the injection pipe ladle-entering section is wrapped with a refractory material, so that the service life is effectively prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment for producing nickel matte by ladle vulcanization of ferronickel alloy steel, namely a ladle vulcanization spray gun device. Background Technique

[0002] In the prior art, there are mainly the following two processes for producing nickel matte by vulcanizing ferronickel alloy: 1. Adding a vulcanizing agent during the converter smelting process to vulcanize the ferronickel alloy to produce nickel matte. 2. Adding a vulcanizing agent to the tapping launder of the submerged arc furnace to vulcanize the ferronickel alloy to produce nickel matte. For the first process, on the one hand, a large amount of sulfur dioxide gas is generated during the smelting process. This gas has strong corrosiveness and will strongly corrode the lining of the submerged arc furnace, resulting in a significant reduction in the service life of the furnace lining and a substantial increase in maintenance costs, thereby leading to a substantial increase in the production cost of nickel matte. On the other hand, currently, this process adds a liquid vulcanizing agent in the converter. The optimal temperature range for the fluidity of the liquid vulcanizing agent is 130°C to 160°C. Beyond this temperature range, the viscosity of the vulcanizing agent becomes higher and it is prone to crystallization, which not only is not conducive to the vulcanization reaction of the ferronickel alloy but also, due to the intermittent sulfur addition operation, the temperature of the sulfur supply pipeline cannot be maintained, causing pipeline blockage. For the second production process, after the molten iron is tapped from the submerged arc furnace, a powdery vulcanizing agent is added to the surface of the liquid alloy through a vulcanizing agent conveying pipeline. Since the density of the vulcanizing agent is lower than that of the ferronickel alloy, it suspends on the upper layer of the alloy, and the vulcanization reaction is not sufficient. Moreover, the powdery vulcanizing agent is easily captured by the dust removal device. Not only can high-grade nickel matte not be obtained, but also a large amount of raw materials are wasted. The utilization rate of the vulcanizing agent in this process is only about 30%. On the other hand, since this process is carried out in a relatively open environment, a large amount of sulfur dioxide gas and soot generated during the vulcanization process cannot be effectively recovered, increasing the difficulty of environmental governance.

[0003] In view of the deficiencies of the above two processes, a process method for producing nickel matte by vulcanizing ferronickel alloy in a ladle is introduced here. This process uses an immersion sulfur spray gun for sulfur spraying operation, that is, the spray gun is inserted into the molten iron to a certain depth and then sulfur is sprayed. However, if this spray gun adopts a hydraulic drive vertical lifting form (such as Figure 6 )), it has the following deficiencies:

[0004] The driving devices such as hydraulic cylinders are located directly above the ladle. A large amount of radiant heat is released by the liquid ferronickel water contained in the ladle. Coupled with the large amount of heat released by the vulcanization reaction, it will damage the hydraulic drive system, reduce the equipment life, increase the maintenance cost, and also pose a safety risk.

[0005] Since the injection pipe moves in the vertical direction and is located directly below the flue gas collection hood, if the dust collection hood is fixed, the distance from the ladle is relatively high, which is not conducive to the collection of flue gases such as sulfur dioxide and dust. According to data calculations, the flue gas capture rate in this form is 50% - 60%, and the flue gas treatment does not meet the standards. If the hood is mobile, although it can move up and down with the lance, its structure will be more complex, with higher design and manufacturing difficulties and higher production costs. Utility Model Content

[0006] The present utility model provides a ladle sulfurization lance device with stable equipment performance, long service life, low maintenance cost, and conducive to flue gas treatment to address the above deficiencies.

[0007] The technical solution of the present utility model is: a ladle sulfurization lance device, including an injection pipe, characterized in that the injection pipe is in an arc shape, the front part of the injection pipe is wrapped with refractory material, the injection pipe is connected to a bracket, the lower part of the bracket is connected to a rotating shaft, and the rotating shaft is connected to a driving device.

[0008] In the above solution, it further includes:

[0009] There is a counterweight at the tail of the bracket.

[0010] The lower part of the bracket is connected to the rotating shaft through a bushing.

[0011] The advantages of the present utility model are: 1. The main body of the injection pipe is in an arc shape, and its movement trajectory is an arc, which can minimize the installation height of the flue gas collection hood, facilitate the recovery of polluting gases such as sulfur dioxide and dust, and achieve the purpose of environmental governance. At this time, the flue gas capture rate is above 95%. 2. The refractory material is wrapped around the section of the injection pipe entering the ladle, effectively extending its service life and reducing maintenance costs. 3. The injection pipe is immersed, that is, inserted into the liquid nickel-iron alloy to a certain depth, and the sulfiding agent is ejected from the bottom of the alloy, and the sulfiding reaction starts from the bottom, improving the utilization rate of raw materials and the quality of the finished product. At this time, the utilization rate of the sulfiding agent is above 90%. 4. The driving device is in the form of a motor - reducer, connected by a coupling, and the device is located outside the ladle, effectively reducing the damage of radiant heat to the equipment, and the equipment performance is stable. Brief Description of the Drawings

[0012] Figure 1 It is a structural schematic diagram of the working state of the present utility model.

[0013] Figure 2 It is a top view of the working state of the present utility model.

[0014] Figure 3 It is a connection diagram of the shaft and the bracket of the present utility model.

[0015] Figure 4 It is a schematic diagram of the standby state of the present utility model.

[0016] Figure 5 This is a schematic diagram of the maintenance state of the present utility model.

[0017] Figure 6 It is a vertical lifting vulcanizing spray gun device before improvement. Specific embodiments

[0018] Refer to Figures 1-5 , and the names of each component are as follows: spray pipe 1, dust collection hood 2, bracket 3, counterweight 4, support 5, refractory material 6, ladle 7, motor 8, ZQ reducer 9, worm reducer 10, plum coupling 11, elastic pin gear coupling 12, elastic pin gear coupling 13, first bearing seat 14, second bearing seat 15, rotating shaft 16, key 17, shaft sleeve 18, retaining ring 19.

[0019] Refer to Figure 6 , and the names of each component are as follows: spray gun 20 before improvement, hydraulic cylinder 21, hydraulic control system 22.

[0020] Refer to Figure 1 -5, a ladle vulcanizing spray gun device, the spray pipe 1 is in an arc shape, the front part of the spray pipe 1 is wrapped with refractory material 6, the spray pipe 1 is connected to the bracket 3, the lower part of the bracket 3 is connected to the rotating shaft 16 through the shaft sleeve 18, there is a counterweight 4 at the tail of the bracket 3, and the rotating shaft 16 is connected to the driving device.

[0021] Specifically, a ladle vulcanizing spray gun device includes a circular arc-shaped spray pipe 1, its in-ladle section is wrapped with refractory material 6, and it is connected to the bracket 3 by a connecting pair. A counterweight 4 is added to the tail. The bracket 3 is bolted to the shaft sleeve 18. The key 17 is installed in the keyway of the rotating shaft 16 and then inserted into the shaft sleeve 18. After positioning, it is fixed with a retaining ring 19. The two ends of the rotating shaft 16 are installed with the first bearing seat 14 and the second bearing seat 15. The two bearing seats are placed on the support 5 and connected by anchor bolts. One end of the rotating shaft 16 is connected to the driving device. The driving device includes a motor 8, a ZQ reducer 9, a worm reducer 10, a plum coupling 11, an elastic pin gear coupling 12, and an elastic pin gear coupling 13. The driving device is in the form of a motor-reducer, and is connected by couplings, which is safe, efficient and stable. The driving device is placed outside the ladle as shown in Figure 2 , which can effectively avoid the damage of this device caused by the radiant heat generated by the liquid nickel iron and the large amount of heat released by the vulcanization reaction.

[0022] The spray pipe 1 is designed in a circular arc shape and is rotated and inserted into the liquid nickel iron alloy from one side of the ladle 7 for spraying operation. This design can minimize the installation height of the dust collection hood 2, ensure the flue gas treatment effect, and at the same time, the in-ladle section of the spray pipe 1 is wrapped with refractory material 6, effectively improving the service life of the spray pipe.

[0023] Through the automated control system, the insertion depth, injection angle, and injection volume of the injection pipe 6 into the ladle can be adjusted. While improving the utilization rate of the vulcanizing agent and the vulcanization operation efficiency, it can also prevent the overflow and splashing of the nickel-iron alloy solution, causing equipment damage and harm to the operators. Through the automated control system, the insertion depth and insertion angle of the injection pipe can be adjusted. By the pressure of the injection gas, the rolling of the liquid nickel-iron alloy is driven, improving the utilization efficiency of the vulcanizing agent and the vulcanization efficiency. Through the automated control system, the injection pressure of the equipment can be accurately controlled, avoiding liquid overflow and splashing caused by excessive injection pressure, and thus avoiding equipment damage and physical harm to the operators. Through the automated control system, the injection timing and the injection amount of the vulcanizing agent can be accurately controlled, effectively improving the utilization rate of the vulcanizing agent and the vulcanization efficiency.

[0024] The ladle vulcanization injection device can rotate to Figure 5 the state shown. The injection pipe 1 and the bracket 3 are connected by a connecting pair, which makes the installation and maintenance of this device more convenient.

[0025] Usage method: The ladle 7 is transported to the vulcanization operation area by a transport device. The transport device has a weighing function. After the weight signal is transmitted to the host by the automated control system, the host quickly calculates the usage amount of the vulcanizing agent and sends a start signal for this device. At this time, the injection pipe first injects inert gas at a certain flow rate to prevent the backflow of the liquid nickel-iron alloy. When the injection pipe 1 is inserted into the ladle 7 at a certain speed, this device starts to inject the vulcanizing agent from slow to fast until the set injection flow rate is reached. After the injection is completed, the automated control system controls this device to slowly lift to Figure 4 the standby state, waiting for the vulcanization operation of the next ladle of alloy. When the injection pipe 1 reaches the end of its service life, the equipment runs to Figure 5 the maintenance state for maintenance or replacement operations.

[0026] The above description is only the specific implementation mode of the present utility model. Various examples do not constitute a limitation to the substantial content of the present utility model.

Claims

1. A ladle vulcanization spray gun device, comprising a spray pipe (1), characterized in that The blowing pipe (1) is in an arc shape. The front part of the blowing pipe (1) is wrapped with a refractory material (6). The blowing pipe (1) is connected to the bracket (3). The lower part of the bracket (3) is connected to the rotating shaft (16). The rotating shaft (16) is connected to the driving device.

2. A ladle vulcanization spray gun device according to claim 1, characterized in that The bracket (3) has a counterweight (4) at the rear end.

3. A ladle vulcanization spray gun device according to claim 1 or 2, characterized in that The lower part of the bracket (3) is connected to the rotating shaft (16) via a shaft sleeve (18).

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