Circulating water-cooling slag flushing nozzle of submerged arc furnace

Abstract

The utility model relates to the technical field of submerged arc furnaces, and discloses a circulating water-cooling slag flushing nozzle of a submerged arc furnace, which comprises the ground and a chute arranged on the ground and positioned below a front cover of the submerged arc furnace, a splash-proof cover positioned above the chute is fixed on the front cover through a locking bolt, and the slag flushing nozzle is arranged on the splash-proof cover; the slag flushing nozzle comprises a water-cooling liquid inlet pipe and a slag flushing flat nozzle communicated with the water-cooling liquid inlet pipe, the outer side face of the water-cooling liquid inlet pipe is sleeved with a spiral circulating water pipe, the contact area of water flow and cooling equipment can be increased through the design of the spiral circulating water pipe, heat exchange between water and the equipment is enhanced, the temperature of the slag flushing nozzle is effectively reduced, and the service life of the slag flushing nozzle is prolonged. Due to the arrangement of the slag flushing flat nozzle and the installation of the splash-proof cover, the splashing and spraying of slag flushing liquid can be avoided, and the risk of injury to equipment and workers is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of submerged arc furnaces, and in particular relates to a circulating water-cooled slag flushing nozzle for a submerged arc furnace. Background Art

[0002] A large amount of slag is produced in the smelting process of the submerged arc furnace. The slag is discharged through the slag chute and flows to the slag flushing nozzle, where it is dispersed by high-pressure water flow to keep the slag layer in the furnace stable. Removing slag helps to increase the temperature in the furnace, speed up the combustion efficiency of coal or other raw materials, and make the smelting reaction smoother. The slag flushing nozzle can remove slag in time, reduce corrosion to equipment, extend the service life of equipment, and effectively remove the slag at the bottom of the furnace to reduce safety hazards.

[0003] Traditional slag flushing nozzles are prone to spattering and spraying during use, which may cause harm to the blast furnace equipment and workers. When working in a high temperature environment, especially near the slag, the limited cooling capacity of traditional slag flushing nozzles may make them susceptible to high temperature damage. Due to their proximity to the slag, traditional slag flushing nozzles may be affected by chemical corrosion and oxidation, which may affect their structural strength and life. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a circulating water-cooled slag flushing nozzle for an electric arc furnace.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A circulating water-cooled slag-flushing nozzle for an ore-fired furnace comprises a ground and a chute opened on the ground and located below a front cover of the ore-fired furnace, a splash shield located above the chute is fixed to the front cover of the furnace by locking bolts, and a slag-flushing nozzle is arranged on the splash shield;

[0007] The slag flushing nozzle comprises a water-cooled liquid inlet pipe and a slag flushing flat nozzle connected to the water-cooled liquid inlet pipe, and the outer side surface of the water-cooled liquid inlet pipe is sleeved with a spiral circulating water pipe.

[0008] Preferably, the slag flushing flat nozzle is arranged to be inclined downward and guide the slag flushing liquid to the chute.

[0009] By arranging the slag flushing flat nozzle to tilt downward, the slag flushing liquid can impact the slag with greater speed and force, thereby improving the flushing effect.

[0010] Preferably, an L-shaped connecting plate is provided on one side of the splash guard, and a locking groove that is clamped on the furnace front cover is formed between the L-shaped connecting plate and the splash guard, and the splash guard is fixed to the inner side of the furnace front cover by a locking bolt that passes through the L-shaped connecting plate.

[0011] The splash guard is fixed to the inner side of the furnace front cover by means of locking bolts, so that the splash guard is more stable and will not be displaced or tilted when the ore-fired furnace is working.

[0012] Preferably, an inclined surface is provided on the side of the splash shield away from the L-shaped connecting plate, a mounting plate is screwed onto the inclined surface via a screw, and a protective sleeve is fixedly provided on the mounting plate which is sleeved on the outer side of the water-cooled liquid inlet pipe and the spiral circulating water pipe.

[0013] By providing the inclined surface and the mounting plate, the protective sleeve can be fixed on the side of the splash guard away from the L-shaped connecting plate. The protective sleeve can protect the water cooling liquid inlet pipe and the spiral circulating water pipe from damage by external forces, thereby increasing their service life.

[0014] Preferably, an isolation cover is provided above the splash cover, and a slag flushing liquid inlet pipe, a circulating water inlet pipe and a circulating water outlet pipe which are arranged through the isolation cover are provided in the space enclosed by the splash cover and the isolation cover. The slag flushing liquid inlet pipe is connected with the liquid inlet of the water-cooled inlet pipe through a quick connector, the circulating water inlet pipe is connected with the liquid inlet of the spiral circulating water pipe through a quick connector, and the circulating water outlet pipe is connected with the liquid outlet of the spiral circulating water pipe through a quick connector.

[0015] Preferably, the slag flushing liquid inlet pipe, circulating water inlet pipe and circulating water outlet pipe are respectively fixed to the top of the splash cover by pipe brackets, which facilitate the installation and positioning of the slag flushing liquid inlet pipe, circulating water inlet pipe and circulating water outlet pipe.

[0016] Compared with the prior art, the technical effects and advantages of the utility model are:

[0017] The circulating water-cooled slag-flushing nozzle of the submerged arc furnace can conveniently discharge the slag from the furnace bottom by setting the slag-flushing nozzle at the end of the chute. The water flow generated by the cooling and flushing of the slag-flushing nozzle can flush the slag into the chute, and discharge the slag out of the furnace through the slag discharge port at the end of the chute to keep the furnace bottom clean.

[0018] The design of the slag flushing flat nozzle allows the water flow to be concentrated to a smaller area, increasing the flushing force and removing the slag more thoroughly. At the same time, the slag flushing flat nozzle set at an angle downward can guide the slag flushing liquid directly into the chute, increasing the flushing effect.

[0019] The design of the spiral circulating water pipe can increase the contact area between the water flow and the cooling equipment, strengthen the heat exchange between the water and the equipment, effectively reduce the temperature of the slag nozzle, and protect it from damage by high temperature. At the same time, the spiral circulating water pipe makes full use of the cooling water, improves the recycling rate of water, reduces water consumption, and achieves the purpose of energy saving.

[0020] The installation of the slag flushing flat nozzle and the splash shield can avoid the splashing and spraying of the slag flushing liquid, reducing the risk of injury to equipment and workers. In addition, the installation of the splash shield and isolation cover can also block the impact of slag and water flow on other components, improving the safety of the working environment.

[0021] The splash guard can be easily fixed and removed by setting the L-shaped connecting plate and the positioning groove of the splash guard. The setting of the inclined surface and the mounting plate also facilitates the installation, positioning and removal of the protective sleeve and the slag flushing liquid inlet pipe. In addition, the design of the quick connector makes the connection and adjustment of each pipeline more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 For this utility model Figure 1 Schematic diagram of the structure after the middle floor, furnace front cover and chute are removed;

[0024] Figure 3 For this utility model Figure 2 Schematic diagram of the structure after the middle isolation cover is disassembled;

[0025] Figure 4 For this utility model Figure 2 Schematic diagram of the structure after the middle isolation cover and protective sleeve are disassembled.

[0026] In the figure: 1. Ground; 2. Furnace front cover; 3. Chute; 4. Locking bolt; 5. Splash cover; 6. Slag flushing nozzle; 601. Water-cooled liquid inlet pipe; 602. Slag flushing flat nozzle; 7. Isolation cover; 8. Spiral circulating water pipe; 9. L-shaped connecting plate; 10. Inclined surface; 11. Screw; 12. Mounting plate; 13. Protective sleeve; 14. Slag flushing liquid inlet pipe; 15. Circulating water inlet pipe; 16. Circulating water outlet pipe; 17. Pipe support. DETAILED DESCRIPTION

[0027] 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.

[0028] The following is combined with Figure 1-4 To further explain this application in detail,

[0029] The embodiment of the present application discloses a circulating water-cooled slag-flushing nozzle of a submerged arc furnace, comprising a ground 1 and a chute 3 opened on the ground 1 and located below a front cover 2 of the submerged arc furnace, a splash shield 5 located above the chute 3 is fixed to the front cover 2 by locking bolts 4, and a slag-flushing nozzle 6 is provided on the splash shield 5;

[0030] The slag flushing nozzle 6 comprises a water-cooled liquid inlet pipe 601 and a slag flushing flat nozzle 602 connected to the water-cooled liquid inlet pipe 601 . The outer side surface of the water-cooled liquid inlet pipe 601 is sleeved with a spiral circulating water pipe 8 .

[0031] The slag flushing nozzle 6 is arranged at the end port of the chute 3, which can conveniently discharge the slag from the furnace bottom. The water flow generated by the cooling and flushing of the slag flushing nozzle 6 can flush the slag into the chute 3, and then discharge it out of the furnace through the slag discharge port at the end of the chute 3, so as to keep the furnace bottom clean;

[0032] The slag flushing nozzle 6 is provided with a slag flushing flat nozzle 602, and the provision of the slag flushing flat nozzle 602 can increase the effect of slag flushing and make it more thorough. The shape of the slag flushing flat nozzle 602 can help concentrate the water flow into a smaller area, increase the flushing force, and thus better remove the slag. In addition, the design of the slag flushing flat nozzle 602 can also reduce the spraying range of the water flow, avoid the water flow directly spraying onto the ore-fired furnace equipment and workers, and improve safety;

[0033] The setting of the spiral circulating water pipe 8 can increase the cooling effect. The design of the spiral circulating water pipe 8 can expand the contact area between the water flow and the cooling equipment, strengthen the heat exchange between the water and the equipment, effectively reduce the temperature of the slag flushing nozzle 6, and protect it from being damaged by high temperature. At the same time, the spiral circulating water pipe 8 can also make full use of the cooling water, improve the recycling rate of water, reduce water consumption, and achieve the purpose of energy saving.

[0034] The slag flushing flat nozzle 602 is arranged to be inclined downward and guides the slag flushing liquid to the chute 3.

[0035] By tilting the slag flushing flat mouth 602 downward, the slag flushing liquid can impact the slag with greater speed and force, thereby improving the flushing effect. The tilted angle can help guide the slag flushing liquid to the position of the slag, ensuring that the flushing force is concentrated on the slag, making it easier to flush out of the chute 3. The tilted slag flushing flat mouth 602 can directly guide the slag flushing liquid into the chute 3, avoiding the slag discharge port at the end of the chute 3 and reducing the splashing of the slag. In this way, the slag can be flushed into the chute 3 more quickly and thoroughly, thereby improving the cleaning efficiency. At the same time, through the slag discharge port at the end of the chute 3, the slag can be smoothly discharged out of the furnace, avoiding slag accumulation at the bottom of the furnace and keeping the bottom of the furnace clean. The slag flushing flat mouth 602 is tilted downward, and the slag flushing liquid is guided to the chute 3, thereby avoiding the splashing of the slag flushing liquid. In this way, the possible damage of the slag flushing liquid to the equipment and staff of the electric arc furnace can be reduced, thereby improving the safety of operation.

[0036] An L-shaped connecting plate 9 is provided on one side of the splash shield 5, and a clamping groove that is clamped on the furnace front cover 2 is formed between the L-shaped connecting plate 9 and the splash shield 5. The splash shield 5 is fixed to the inner side of the furnace front cover 2 by a locking bolt 4 that passes through the L-shaped connecting plate 9.

[0037] The splash shield 5 is fixed to the inner side of the furnace front cover 2 by the locking bolt 4, which can increase the stability of the splash shield 5 so that it will not be displaced or tilted when the ore furnace is working. The splash shield 5 can prevent slag from splashing out of the chute 3 and causing pollution and damage to the furnace front cover 2 and the surrounding environment. By being fixed to the inner side of the furnace front cover 2, the splash shield 5 can better play its protective role, and the design of the L-shaped connecting plate 9 makes the installation and removal of the splash shield 5 more convenient. The splash shield 5 can be fixed to the inner side of the furnace front cover 2 by the locking bolt 4, and can also be easily removed when necessary, which is convenient for maintenance and overhaul.

[0038] An inclined surface 10 is provided on one side of the splash shield 5 away from the L-shaped connecting plate 9, and a mounting plate 12 is screwed to the inclined surface 10 through a screw 11. A protective sleeve 13 is fixedly provided on the mounting plate 12 and is sleeved on the outer side of the water-cooling liquid inlet pipe 601 and the spiral circulating water pipe 8.

[0039] By setting the inclined surface 10 and the mounting plate 12, the protective sleeve 13 can be fixed on the side of the splash shield 5 away from the L-shaped connecting plate 9. The protective sleeve 13 can protect the water-cooled liquid inlet pipe 601 and the spiral circulating water pipe 8 from damage by external forces, increase their service life, and prevent water leakage and seepage. The setting of the inclined surface 10 and the mounting plate 12 can increase the stability of the splash shield 5 and ensure that the position and connection of the water-cooled liquid inlet pipe 601 and the spiral circulating water pipe 8 remain stable. This helps to avoid loosening or damage caused by vibration or displacement, and ensure the normal operation and cooling effect of the slag flushing nozzle 6. Through the setting of the protective sleeve 13, the water-cooled liquid inlet pipe 601 and the spiral circulating water pipe 8 can be easily disassembled and replaced. This can simplify maintenance and overhaul work and improve work efficiency.

[0040] The protective sleeve 13 can also lock and fix the water-cooling liquid inlet pipe 601 inside the protective sleeve 13 by means of locking screws, so as to facilitate the installation, positioning and disassembly of the slag flushing nozzle 6.

[0041] An isolation cover 7 is provided above the splash cover 5. A slag flushing liquid inlet pipe 14, a circulating water inlet pipe 15 and a circulating water outlet pipe 16 which are arranged through the isolation cover 7 are provided in the space enclosed by the splash cover 5 and the isolation cover 7. The slag flushing liquid inlet pipe 14 is connected to the liquid inlet of the water-cooled inlet pipe 601 through a quick connector, the circulating water inlet pipe 15 is connected to the liquid inlet of the spiral circulating water pipe 8 through a quick connector, and the circulating water outlet pipe 16 is connected to the liquid outlet of the spiral circulating water pipe 8 through a quick connector.

[0042] The setting of the isolation cover 7 can isolate the slag flushing liquid inlet pipe 14 and the circulating water pipe from other components to prevent the slag and water flow from affecting or harming other equipment or workers. This can improve safety and reduce unexpected situations during the operation of the submerged arc furnace. The design of the quick connector allows the slag flushing liquid inlet pipe 14, the circulating water inlet pipe 15 and the circulating water outlet pipe 16 to be easily disassembled and replaced. This facilitates equipment maintenance and cleaning work, reduces downtime and work difficulty.

[0043] The isolation cover 7 can be fixed on the top of the splash cover 5 by screws, and can also be locked on the top of the splash cover 5 by a lock, which is convenient for the installation and removal of the isolation cover 7, and the inspection and maintenance of the components in the space surrounded by the splash cover 5 and the isolation cover 7. The isolation cover 7 is used to isolate and protect the slag flushing liquid inlet pipe 14, the circulating water inlet pipe 15 and the circulating water outlet pipe 16 to prevent the slag flushing liquid inlet pipe 14, the circulating water inlet pipe 15 and the circulating water outlet pipe 16 from being scoured by slag and damaged by high temperature. Insulation cotton is sleeved on the slag flushing liquid inlet pipe 14, the circulating water inlet pipe 15 and the circulating water outlet pipe 16 to prevent the liquid delivery process from being affected by the external temperature. It has good thermal insulation and heat preservation functions, which facilitates the delivery of cold liquid to the spiral circulating water pipe 8 or the slag flushing nozzle 6.

[0044] The slag flushing liquid inlet pipe 14 , the circulating water inlet pipe 15 and the circulating water outlet pipe 16 are respectively fixed to the top of the splash cover 5 through pipe brackets 17 , which facilitate the installation and positioning of the slag flushing liquid inlet pipe 14 , the circulating water inlet pipe 15 and the circulating water outlet pipe 16 .

[0045] The circulating water-cooled slag-flushing nozzle of the ore-fired furnace can conveniently discharge the slag from the furnace bottom by setting the slag-flushing nozzle 6 at the end port of the chute 3, and then discharge the slag out of the furnace through the slag discharge port at the end of the chute 3, so as to keep the furnace bottom clean. The outer side of the water-cooled liquid inlet pipe 601 of the ore-fired slag-flushing nozzle 6 is sleeved with a spiral circulating water pipe 8. By setting the slag-flushing flat nozzle 602 tilted downward, the slag-flushing liquid can impact the slag with greater speed and force, thereby improving the flushing effect. At the same time, the setting of the slag-flushing flat nozzle 602 can reduce the spraying range of the water flow, avoid the water flow from directly spraying onto the ore-fired furnace equipment and staff, and improve safety.

[0046] The cooling effect of water flow and water-cooled liquid inlet pipe 601 is used to keep the temperature of slag flushing nozzle 6 stable, and the cooling water is recycled through spiral circulating water pipe 8 to achieve the purpose of energy saving. At the same time, the design of splash shield 5, isolation cover 7 and protective sleeve 13 can provide protection and isolation to prevent slag and water flow from causing harm to equipment and personnel. The design of quick connector facilitates the in and out of slag flushing liquid and the circulation control of water flow.

[0047] 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 circulating water-cooled slag flushing nozzle for an ore-fired furnace, comprising a ground (1) and a chute (3) opened on the ground (1) and located below a front cover (2) of the ore-fired furnace, characterized in that: A splash shield (5) located above the chute (3) is fixed to the furnace front cover (2) via locking bolts (4), and a slag flushing nozzle (6) is provided on the splash shield (5); The slag flushing nozzle (6) comprises a water-cooled liquid inlet pipe (601) and a slag flushing flat nozzle (602) connected to the water-cooled liquid inlet pipe (601), and the outer side surface of the water-cooled liquid inlet pipe (601) is sleeved with a spiral circulating water pipe (8).

2. The circulating water-cooled slag flushing nozzle of a submerged arc furnace according to claim 1, characterized in that: The slag flushing flat nozzle (602) is arranged to be inclined downward and guides the slag flushing liquid to the chute (3).

3. The circulating water-cooled slag flushing nozzle of a submerged arc furnace according to claim 1, characterized in that: An L-shaped connecting plate (9) is provided on one side of the splash shield (5), and a clamping groove clamped on the furnace front cover (2) is formed between the L-shaped connecting plate (9) and the splash shield (5), and the splash shield (5) is fixed to the inner side of the furnace front cover (2) by a locking bolt (4) penetrating the L-shaped connecting plate (9).

4. The circulating water-cooled slag flushing nozzle of a submerged arc furnace according to claim 3, characterized in that: An inclined surface (10) is provided on the side of the splash shield (5) away from the L-shaped connecting plate (9), a mounting plate (12) is screwed onto the inclined surface (10) via a screw rod (11), and a protective sleeve (13) is fixedly provided on the mounting plate (12) and is sleeved onto the outer side of the water-cooling liquid inlet pipe (601) and the spiral circulating water pipe (8).

5. The circulating water-cooled slag flushing nozzle of a submerged arc furnace according to claim 1, characterized in that: An isolation cover (7) is arranged above the splash cover (5), and a slag flushing liquid inlet pipe (14), a circulating water inlet pipe (15) and a circulating water outlet pipe (16) which are arranged through the isolation cover (7) are arranged in the space enclosed by the splash cover (5) and the isolation cover (7). The slag flushing liquid inlet pipe (14) is connected to the liquid inlet of the water-cooled liquid inlet pipe (601) through a quick connector, the circulating water inlet pipe (15) is connected to the liquid inlet of the spiral circulating water pipe (8) through a quick connector, and the circulating water outlet pipe (16) is connected to the liquid outlet of the spiral circulating water pipe (8) through a quick connector.

6. The circulating water-cooled slag flushing nozzle of a submerged arc furnace according to claim 5, characterized in that: The slag flushing liquid inlet pipe (14), the circulating water inlet pipe (15) and the circulating water outlet pipe (16) are respectively fixed on the top of the splash shield (5) through pipe brackets (17).

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