Device for repairing bottom of blast furnace taphole main channel on line

Abstract

The utility model relates to a device for online repairing the bottom of a blast furnace taphole main channel, which comprises a refractory cover, a camera, a spray head, a mixing tank, a metal hose, a stirrer, a nitrogen tank, a booster pump and a nitrogen hose, the camera is fixedly connected to the inner top of the refractory cover, the spray head is arranged in the refractory cover and connected with the metal hose, and the metal hose is connected with the mixing tank. The mixing tank is connected with the metal hose through the delivery pump, and a stirrer is arranged in the mixing tank; a nitrogen hole is formed in the fireproof cover, the nitrogen tank is connected with the booster pump, the booster pump is connected with the fireproof cover through a nitrogen hose, and the nitrogen hose is connected with the nitrogen hole. The online repairing device has the advantages that the overall structure is reasonable, liquid slag iron in an area in the refractory cover can be blown out of the refractory cover by utilizing pressurized nitrogen, an amorphous refractory material is conveyed to an eroded part through the spray head, the eroded area at the bottom of the taphole main channel is repaired online, the operation is simple, normal production is not influenced, the liquid slag iron in the main channel does not need to be completely discharged, and the production efficiency is improved. And the blast furnace sand outlet frequency is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of blast furnace smelting, and particularly relates to a device for online repairing the erosion area at the bottom of a main groove of a blast furnace iron mouth. Background Art

[0002] At present, the main trench of blast furnaces is generally an iron storage type main trench, and a part of slag is retained in the main trench daily. During the iron tapping process, the main trench of the blast furnace iron mouth is affected by the slag flow, and the side walls and bottom of the main trench will be continuously eroded. Therefore, the damaged parts need to be repaired regularly during the service life of the main trench. During this period, the main trench must be cleaned out of the slag through the sand discharge port. This repair method will consume a lot of manpower and material resources, and bring certain safety risks.

[0003] In the prior art, patent application number: CN202211730385.8 discloses a prefabricated part for hot repair of iron ditch and its construction method, which can be directly assembled and laid on the damaged surface of the main iron ditch, and the prefabricated part and the residual lining of the main iron ditch are bonded by casting material, and the repaired main iron ditch is restored to its original state by the prefabricated part. However, it is impossible to do online repair during the repair process, and the slag iron in the main ditch needs to be cleaned out by sand outlet before repairing, which affects normal production. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a device for online repairing the bottom of the main groove of the iron mouth of a blast furnace, so as to realize online repairing of the eroded area at the bottom of the main groove of the iron mouth, reduce the frequency of sand release at the blast furnace, and avoid the safety hazards and labor costs caused by the sand release operation.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A device for online repairing the bottom of the main groove of a blast furnace iron mouth comprises a refractory hood, a camera, a nozzle, a mixing tank, a metal hose, an agitator, a nitrogen tank, a booster pump and a nitrogen hose. A camera is fixedly connected to the top of the refractory hood, a nozzle is arranged in the refractory hood, the nozzle is connected to the metal hose, the metal hose is connected to the mixing tank, the mixing tank is connected to the metal hose via a delivery pump, and the agitator is arranged in the mixing tank; a nitrogen hole is arranged on the refractory hood, the nitrogen tank is connected to the booster pump, the booster pump is connected to the refractory hood via the nitrogen hose, and the nitrogen hose is connected to the nitrogen hole.

[0007] The fireproof cover is a bell-shaped structure.

[0008] The fireproof cover is composed of a steel structure frame and a fireproof layer, and the fireproof layer is fixed inside and outside the steel structure frame.

[0009] The top of the fireproof cover is fixedly connected with a lifting ring.

[0010] The nozzle is fixedly connected to the fireproof cover.

[0011] A valve is connected between the nozzle and the delivery pump.

[0012] The pipeline between the nitrogen tank and the booster pump is connected with a front valve, and the nitrogen hose is connected with a rear valve.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The device for online repairing the bottom of the main groove of the blast furnace iron mouth has a reasonable structure. The pressurized nitrogen is used to blow the liquid slag in the area inside the refractory hood out of the refractory hood. The position of the eroded part is determined according to the camera image, and the amorphous refractory material is transported to the eroded part through the nozzle to complete the online repair of the eroded area at the bottom of the main groove of the iron mouth. The operation is simple and does not affect the normal production. There is no need to clean out the liquid slag in the main groove, which reduces the frequency of sand discharge at the blast furnace and avoids the safety hazards and labor costs caused by the sand discharge operation, which is beneficial to the organization and planning of iron discharge in front of the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] In the figure: 1- fireproof cover 2- computer terminal 3- camera 4- nozzle 5- metal hose 6- valve 7- delivery pump 8- agitator 9- front valve 10- booster pump 11- nitrogen tank 12- nitrogen hose 13- rear valve 14- liquid slag 15- bottom of main trench 16- lifting ring 17- mixing tank. DETAILED DESCRIPTION

[0017] The present invention is described in detail below in conjunction with the accompanying drawings of the specification, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0018] See Figure 1 , a device for online repairing the bottom of the main groove of the iron mouth of a blast furnace, comprising a refractory cover 1, a camera 3, a nozzle 4, a mixing tank 17, a metal hose 5, an agitator 8, a nitrogen tank 11, a booster pump 10, and a nitrogen hose 12. A mounting hole for the camera 3 is opened on the top of the refractory cover 1. The refractory cover 1 and the camera 3 are fixedly connected by a flange, and the connection is sealed by a refractory material. A nozzle 4 is arranged in the refractory cover 1, and the nozzle 4 is connected to the metal hose 5. The metal hose 5 is connected to the mixing tank 17. The mixing tank 17 is connected to the metal hose 5 via a delivery pump 7. The agitator 8 is arranged in the mixing tank 17; a nitrogen hole is arranged on the refractory cover 1, and the nitrogen tank 11 is connected to the booster pump 10. The booster pump 10 is connected to the refractory cover 1 via a nitrogen hose 12, and the nitrogen hose 12 is connected to the nitrogen hole.

[0019] The fireproof cover 1 is a bell-shaped structure. The fireproof cover 1 is composed of a steel structure frame and a fireproof layer, and the fireproof layer is fixed inside and outside the steel structure frame. A lifting ring 16 is fixedly connected to the top of the fireproof cover 1 to facilitate on-site lifting. The nozzle 4 is fixedly connected to the fireproof cover 1, and a valve 6 is connected between the nozzle 4 and the delivery pump 7, and the valve 6 can be a ball valve.

[0020] A front valve 9 is connected to the pipeline between the nitrogen tank 11 and the booster pump 10, and a rear valve 13 is connected to the nitrogen hose 12 to ensure the sealing during the nitrogen delivery process.

[0021] The method for online repairing the eroded part at the bottom of the main groove of the blast furnace iron mouth is to first gradually immerse the refractory cover 1 into the molten iron by a crane, open the nitrogen tank 11, the front valve 9, the booster pump 10 and the rear valve 13, and the high-pressure nitrogen will discharge the liquid slag 14 in the refractory cover 1 until the refractory cover 1 reaches the bottom 15 of the main groove. The position of the eroded part is determined according to the image transmitted to the computer terminal 2 by the camera 3. If there is no eroded part at this position, the refractory cover 1 is moved and the above steps are repeated until it is determined that there is an eroded part. Start the delivery pump 7 and the valve 6, and deliver the amorphous refractory material (gunning material) to the eroded part through the nozzle 4. After the repair is completed, turn off the delivery pump 7 and the valve 6 and let it stand for about 20 minutes, then gradually lift the bell-shaped refractory frame, and finally turn off the booster pump 10 and the front valve 9 and the rear valve 13.

[0022] The utility model has a reasonable structure and uses pressurized nitrogen to blow liquid slag and iron in the area inside the refractory hood to the outside of the refractory hood. The position of the eroded part is determined according to the camera image, and the amorphous refractory material is transported to the eroded part through the nozzle to complete the online repair of the eroded area at the bottom of the main groove of the iron mouth. The operation is simple and does not affect the normal production. There is no need to clean out the liquid slag and iron in the main groove, which reduces the frequency of sand discharge at the blast furnace, avoids the safety hazards and labor costs caused by the sand discharge operation, and is beneficial to the organization and planning of iron discharge in front of the furnace.

[0023] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for online repairing the bottom of the main groove of the blast furnace iron mouth, characterized in that: It includes a fire-resistant hood, a camera, a nozzle, a mixing tank, a metal hose, an agitator, a nitrogen tank, a booster pump, and a nitrogen hose. A camera is fixedly connected to the top of the fire-resistant hood. A nozzle is arranged inside the fire-resistant hood, the nozzle is connected to the metal hose, the metal hose is connected to the mixing tank, the mixing tank is connected to the metal hose via a conveying pump, and the mixing tank is provided with an agitator. Nitrogen holes are arranged on the fire-resistant hood, the nitrogen tank is connected to the booster pump, the booster pump is connected to the fire-resistant hood via a nitrogen hose, and the nitrogen hose is connected to the nitrogen holes.

2. The device for online repairing the bottom of the main groove of the blast furnace iron mouth according to claim 1 is characterized in that: The fireproof cover is a bell-shaped structure.

3. The device for online repairing the bottom of the main groove of the blast furnace iron mouth according to claim 1 or 2, characterized in that: The fireproof cover is composed of a steel structure frame and a fireproof layer, and the fireproof layer is fixed inside and outside the steel structure frame.

4. The device for online repairing the bottom of the main groove of the blast furnace iron mouth according to claim 1 is characterized in that: The top of the fireproof cover is fixedly connected with a lifting ring.

5. The device for online repairing the bottom of the main groove of the blast furnace iron mouth according to claim 1 is characterized in that: The nozzle is fixedly connected to the fireproof cover.

6. The device for online repairing the bottom of the main groove of the blast furnace iron mouth according to claim 1, characterized in that: A valve is connected between the nozzle and the delivery pump.

7. The device for online repairing the bottom of the main groove of the blast furnace iron mouth according to claim 1 is characterized in that: The pipeline between the nitrogen tank and the booster pump is connected with a front valve, and the nitrogen hose is connected with a rear valve.

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