Ferronickel smelting submerged arc furnace cover

Abstract

The utility model discloses a ferronickel smelting submerged arc furnace cover which comprises a furnace cover body, the furnace cover body comprises a first beam frame and a second beam frame located at the bottom of the first beam frame, two layers of refractory bricks are arranged at the bottom of the second beam frame, and an air cooling pipe is annularly arranged between the first beam frame and the second beam frame. The surface of the air cooling pipe is connected with a plurality of branch pipes, the branch pipes extend to the center of the first beam frame and the center of the second beam frame, cold air generated by the air cooling machine is introduced into the air cooling pipe through the connecting pipes and is introduced into the multiple sets of branch pipes from the air cooling pipe, and the temperature in the branch pipes can be reduced accordingly; therefore, heat exchange is conducted between the multiple sets of branch pipes in the first beam frame and the second beam frame and the temperature in the furnace cover, the temperature in the furnace cover is lowered, cold air for heat exchange in the branch pipes flows into the air cooling pipe again after flowing, and flows back into the connecting pipe from the other end of the air cooling pipe to be cooled again, the cold air can be recycled, and the energy consumption is reduced. And more energy is saved, and the furnace cover is cooled more conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of ore-heated furnace covers, and in particular relates to an ore-heated furnace cover for ferronickel smelting. Background Art

[0002] The ore-arc furnace is also called an arc furnace or a resistance furnace. It is mainly used for reducing and smelting raw materials such as ores, carbonaceous reducing agents and solvents. The slag temperature of the ore-arc furnace for smelting nickel-iron is high, and the furnace temperature is high when there is material collapse and slag overturning. At this time, the furnace cover needs to withstand a high temperature load, so it is necessary to cool the furnace cover in time to avoid causing safety accidents. The existing method of cooling the furnace cover is to cool the furnace cover by circulating cooling water, and the cooling water circulation requires additional energy to run the water pump and the heat exchanger, and the cooling water circulation also requires a large amount of water resources to maintain the circulation and cooling effect, thereby increasing the energy consumption cost of the smelting process, which is relatively inconvenient. Utility Model Content

[0003] The utility model aims to provide a nickel-iron smelting ore-heat furnace cover to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above purpose, the utility model provides the following technical solution: a nickel-iron smelting ore-heat furnace cover, comprising:

[0005] A furnace cover, the furnace cover includes a first beam frame and a second beam frame located at the bottom of the first beam frame, two layers of refractory bricks are arranged at the bottom of the second beam frame, a pressure plate is connected to the bottom of the second beam frame through hanging, and the pressure plate is connected to the refractory bricks, an air cooling pipe is arranged in a ring shape between the first beam frame and the second beam frame, a plurality of branch pipes are connected to the surface of the air cooling pipe, and the branch pipes extend to the center of the first beam frame and the second beam frame, two ends of the air cooling pipe are respectively connected to connecting pipes, and connected to the air cooler through the connecting pipes, so that the cold air generated by the air cooler enters the air cooling pipe through the connecting pipe to cool the furnace cover.

[0006] Preferably, a steel pipe is screwed to one side of the second beam frame through a U-shaped screw, and a refractory castable is poured at the bottom of the steel pipe and on one side of the refractory brick.

[0007] Preferably, a plurality of screw rods are screwed to the bottom of the first beam, a hanger is screwed to the bottom of the screw rods, and one end of the hanger is connected to the second beam.

[0008] Preferably, the bottom of the refractory brick is provided with refractory fiber wool.

[0009] Preferably, an inspection cover plate and a plurality of lifting ears are provided on the surface of the first beam frame, and a molten iron temperature meter and a pressure sensor are provided on one side of the inspection cover plate.

[0010] Preferably, an electrode guide is provided on the surface of the first beam.

[0011] Compared with the prior art, the utility model has the following beneficial effects: by connecting one end of the connecting pipe to an external air cooler, the cold air generated by the air cooler is passed into the air cooling pipe through the connecting pipe, and is passed from the air cooling pipe into multiple groups of branch pipes, and the temperature in the branch pipe will decrease accordingly, thereby performing heat exchange with the temperature in the furnace cover through the multiple groups of branch pipes in the first beam frame and the second beam frame, thereby cooling the temperature in the furnace cover, and the refractory bricks and refractory castables at the bottom of the second beam frame have excellent heat resistance, and at the bottom of the furnace cover, the refractory bricks and refractory castables can be used as thermal insulation layers to isolate the high temperature environment and the heat transfer from the external environment, reducing the absorption of heat in the furnace by the furnace cover, thereby reducing the temperature in the furnace cover, and cooling the furnace cover in conjunction with the branch pipe can effectively reduce the temperature of the furnace cover surface, and the cold air that performs heat exchange in the branch pipe flows back into the air cooling pipe after flowing, and flows back into the connecting pipe from the other end of the air cooling pipe for re-cooling, so that the cold air can be recycled, which is more energy-saving and more convenient to cool the furnace cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a cross-sectional view of the utility model.

[0014] In the figure: 1. first beam; 2. second beam; 3. refractory brick; 4. hanger; 5. pressure plate; 6. air cooling pipe; 7. branch pipe; 8. connecting pipe; 9. U-shaped screw; 10. steel pipe; 11. refractory castable; 12. screw; 13. hanger; 14. refractory fiber wool; 15. inspection cover; 16. lifting ear; 17. pressure sensor; 18. molten iron temperature meter; 19. electrode guide. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] The utility model provides Figure 1-2 A nickel-iron smelting ore-heat furnace cover is shown, comprising:

[0017] A furnace cover, the furnace cover includes a first beam frame 1 and a second beam frame 2 located at the bottom of the first beam frame 1, two layers of refractory bricks 3 are arranged at the bottom of the second beam frame 2, a pressure plate 5 is connected to the bottom of the second beam frame 2 through a hanger 4, and the pressure plate 5 is connected to the refractory bricks 3, an air cooling pipe 6 is arranged in a ring shape between the first beam frame 1 and the second beam frame 2, a plurality of branch pipes 7 are connected to the surface of the air cooling pipe 6, and the branch pipe 7 extends to the center of the first beam frame 1 and the second beam frame 2, both ends of the air cooling pipe 6 are respectively connected to connecting pipes 8, and are connected to the air cooler through the connecting pipes 8, so that the cold air generated by the air cooler enters the air cooling pipe 6 through the connecting pipe 8 to cool the furnace cover.

[0018] A steel pipe 10 is screwed to one side of the second beam 2 through a U-shaped screw 9, and a refractory castable 11 is poured at the bottom of the steel pipe 10 and on one side of the refractory brick 3. The refractory castable 11 has good high temperature resistance and can keep the furnace cover stable under high temperature conditions.

[0019] A plurality of screw rods 12 are screwed to the bottom of the first beam 1 , a hanger 13 is screwed to the bottom of the screw rods 12 , and one end of the hanger 13 is connected to the second beam 2 .

[0020] The bottom of the refractory brick 3 is provided with refractory fiber wool 14, which has excellent high temperature resistance, thermal shock resistance, oxidation resistance and other properties. It is arranged at the bottom of the refractory brick 3 to further enhance the refractory performance and corrosion resistance of the furnace cover.

[0021] An inspection cover 15 and a plurality of lifting ears 16 are provided on the surface of the first beam 1. A molten iron thermometer 18 and a pressure sensor 17 are provided on one side of the inspection cover 15. The molten iron thermometer 18 is used to monitor and control the temperature of the molten iron in the furnace in real time to ensure that the smelting process is carried out under optimal temperature conditions. The pressure sensor 17 is used to monitor the changes in the pressure in the furnace to ensure the safety and stability of the smelting process.

[0022] An electrode guide 19 is provided on the surface of the first beam 1, and the electrode guide 19 is used to guide the electrode from the furnace cover into the furnace and ensure the correct positioning of the electrode in the furnace.

[0023] The nickel-iron smelting ore-heat furnace cover is connected to an external air cooler at one end of a connecting pipe 8, so that the cold air generated by the air cooler passes through the connecting pipe 8 into the air cooling pipe 6, and is passed from the air cooling pipe 6 into the multiple groups of branch pipes 7, and the temperature in the branch pipes 7 is reduced accordingly, so that the multiple groups of branch pipes 7 in the first beam frame 1 and the second beam frame 2 exchange heat with the temperature in the furnace cover, and the temperature in the furnace cover is cooled down, and the refractory bricks 3 and the refractory castable 11 at the bottom of the second beam frame 2 have excellent heat resistance. At the bottom, the refractory bricks 3 and the refractory castable 11 can be used as an insulation layer to isolate the heat transfer from the high-temperature environment and the external environment and reduce the absorption of heat in the furnace by the furnace cover, thereby reducing the temperature in the furnace cover. Cooperating with the branch pipe 7 to cool the furnace cover, the temperature of the furnace cover surface can be effectively reduced, and the cold air that performs heat exchange in the branch pipe 7 flows back into the air-cooling pipe 6 after flowing, and flows back into the connecting pipe 8 from the other end of the air-cooling pipe 6 for re-cooling, so that the cold air can be recycled, which is more energy-saving and convenient for cooling the furnace cover.

[0024] 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 nickel-iron smelting ore-heat furnace cover, characterized in that: include: A furnace cover, the furnace cover comprising a first beam frame (1) and a second beam frame (2) located at the bottom of the first beam frame (1), two layers of refractory bricks (3) being arranged at the bottom of the second beam frame (2), a pressure plate (5) being connected to the bottom of the second beam frame (2) via a hanger (4), and the pressure plate (5) being connected to the refractory bricks (3), an air cooling pipe (6) being arranged in a ring shape between the first beam frame (1) and the second beam frame (2), a plurality of branch pipes (7) being connected to the surface of the air cooling pipe (6), and the branch pipes (7) extending to the center of the first beam frame (1) and the second beam frame (2), two ends of the air cooling pipe (6) being respectively connected to connecting pipes (8), and being connected to an air cooler via the connecting pipes (8), so that cold air generated by the air cooler enters the air cooling pipe (6) through the connecting pipes (8) to cool the furnace cover.

2. The nickel-iron smelting ore-heat furnace cover according to claim 1, characterized in that: A steel pipe (10) is screwed to one side of the second beam frame (2) via a U-shaped screw rod (9), and a refractory castable (11) is poured at the bottom of the steel pipe (10) and located on one side of the refractory brick (3).

3. The nickel-iron smelting ore-heat furnace cover according to claim 1, characterized in that: A plurality of screw rods (12) are screwed to the bottom of the first beam frame (1), a hanger (13) is screwed to the bottom of the screw rods (12), and one end of the hanger (13) is connected to the second beam frame (2).

4. The nickel-iron smelting ore-heat furnace cover according to claim 1, characterized in that: The bottom of the refractory brick (3) is provided with refractory fiber wool (14).

5. The nickel-iron smelting ore-heat furnace cover according to claim 1, characterized in that: An inspection cover plate (15) and a plurality of lifting ears (16) are provided on the surface of the first beam frame (1), and a molten iron temperature measuring instrument (18) and a pressure sensor (17) are provided on one side of the inspection cover plate (15).

6. The nickel-iron smelting ore-heat furnace cover according to claim 1, characterized in that: An electrode guide (19) is provided on the surface of the first beam frame (1).

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