Submerged arc furnace lining cooling device

Abstract

The utility model discloses a submerged arc furnace lining cooling device, and relates to the field of submerged arc furnaces. A furnace brick lining is arranged in the inner wall of the furnace body, a spiral cooling pipe is arranged on the inner wall of the furnace brick lining, a cooling inlet pipe is arranged at one end of the spiral cooling pipe, a cooling outlet pipe is arranged at the other end of the spiral cooling pipe, and the cooling inlet pipe and the cooling outlet pipe both extend out of the furnace body. The other end of the cooling inlet pipe is connected with a cold air inlet pipe and a cooling water inlet pipe through a three-way valve, the other end of the cooling outlet pipe is connected with a cooling water outlet pipe and an exhaust pipe through a three-way valve, and according to the scheme, the problems that a submerged arc furnace lining cooling device is poor in cooling effect, and a furnace body cannot be kept within a stable temperature range are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of submerged arc furnaces, in particular to a submerged arc furnace lining cooling device. Background Art

[0002] Submerged arc furnaces, also known as electric arc furnaces or resistance furnaces, are a crucial piece of equipment in the metallurgical industry, primarily used for the reduction and smelting of raw materials such as ore, carbonaceous reducing agents, and solvents. They are lined with carbon or magnesia refractory materials and utilize self-heating electrodes. The electrodes are inserted into the furnace charge to create a submerged arc, utilizing the arc energy and the electrical current flowing through the charge to generate energy for melting the metal. Throughout the process, the furnace is continuously fed with charge and intermittently tapped, achieving continuous operation. The furnace primarily consists of a furnace shell, cover, lining, short-circuit screen, water cooling system, exhaust system, dust removal system, electrode shell, electrode pressure and lifting system, loading and unloading system, gripper, burn-through device, hydraulic system, furnace transformer, and various electrical equipment. These components work together to ensure the proper operation of the furnace.

[0003] For example, the Chinese authorized patent "A Submerged Arc Furnace" with announcement number CN220321986U includes a furnace body, and several lower protective sleeves are evenly arranged on the outer circumference of the furnace body. The adjacent lower protective sleeves are bonded together, and an upper protective sleeve is also provided on the outer circumference of the furnace body. The bottom end of the upper protective sleeve is detachably connected to the corresponding lower protective sleeve. An anti-scalding pad is provided at the top opening of the upper protective sleeve, and the anti-scalding pad is arranged in a ring shape around the top opening of the furnace body.

[0004] Although the above-mentioned existing technology can realize the smelting of ore, the submerged arc furnace will generate extremely high heat during operation, which will not only cause thermal stress damage to the furnace body itself, but may also affect the normal operation of other components in the furnace. Although there are matching cooling devices on the market, the cooling effect is poor and cannot keep the furnace body within a stable temperature range. Therefore, it does not meet the existing needs. In this regard, we propose a submerged arc furnace lining cooling device. Utility Model Content

[0005] The purpose of the utility model is to provide a submerged arc furnace lining cooling device to solve the problem that the submerged arc furnace lining cooling device proposed in the above background technology has poor cooling effect and cannot keep the furnace body in a stable temperature range.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lining cooling device for an electric arc furnace, comprising a furnace body; a furnace brick lining is provided in the inner wall of the furnace body, and a spiral cooling pipe is provided on the inner wall of the furnace brick lining, and a cooling inlet pipe is provided at one end of the spiral cooling pipe, and a cooling outlet pipe is provided at the other end of the spiral cooling pipe, and the cooling inlet pipe and the cooling outlet pipe both extend to the outside of the furnace body, the other end of the cooling inlet pipe is connected to a cold air inlet pipe and a cooling water inlet pipe through a three-way valve, and the other end of the cooling outlet pipe is connected to a cooling water outlet pipe and an exhaust pipe through a three-way valve.

[0007] Preferably, a cooling water tank is provided on one side of the furnace body, one end of the cooling water inlet pipe and the cooling water outlet pipe are connected to the water storage cavity of the cooling water tank, and a circulating pump is installed outside the cooling water inlet pipe.

[0008] Preferably, a refrigeration chamber is provided below the water storage chamber in the cooling water storage tank, one side of the refrigeration chamber is connected to the cold air inlet pipe, and the other side of the refrigeration chamber is provided with an air inlet grille, and an air pump is installed outside the cold air inlet pipe.

[0009] Preferably, an evaporator is installed inside the refrigeration cavity, a cold guide plate is provided on the top of the refrigeration cavity, and the cold guide plate serves as the bottom plate of the water storage cavity in the cooling water storage tank, a heat dissipation cavity is provided at the bottom of the cooling water storage tank, and a condenser, a compressor and an expansion valve are respectively provided inside the heat dissipation cavity, and the condenser, compressor, expansion valve and evaporator are connected by pipes.

[0010] Preferably, a sealing cover is provided on one side of the top end of the cooling water storage tank.

[0011] Preferably, an iron outlet is provided at the lower end of the other side of the furnace body.

[0012] Preferably, the spiral cooling tube is made of stainless steel.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model adopts a combination of water cooling and air cooling to cool the furnace lining. Based on the problem that the cooling water temperature rises linearly with the water circulation and the cooling mechanism is not efficient enough, under normal circumstances, the spiral cooling pipe, the cooling water inlet pipe and the cooling water outlet pipe are connected through a three-way valve. By turning on the pump, the cooling water is sent into the interior of the spiral cooling pipe through the cooling inlet pipe. During the flow, heat exchange is formed with the furnace brick lining, thereby reducing the temperature of the furnace brick lining. As the water circulation time increases, the cooling water temperature will also increase, resulting in a worse cooling effect on the furnace brick lining. At this time, the cooling water inlet pipe and the cooling water outlet pipe are closed by the three-way valve, and the cold air inlet pipe and the exhaust pipe are connected to the spiral cooling pipe. At this time, the air pump is turned on to transport external air into the spiral cooling pipe to cool the furnace brick lining instead of cooling water. Although the cooling performance is not as good as cooling water in a low temperature state, compared with cooling water that absorbs more heat, it can ensure the stability of the cooling of the furnace body, and at the same time give the cooling water time in the cooling water storage tank, providing a guarantee for subsequent efficient cooling.

[0015] 2. The present invention features a refrigeration chamber with an evaporator mounted within it. This chamber absorbs heat through the evaporation of a refrigerant, generating cooling energy. A cooling plate is positioned between the refrigeration chamber and the cooling water tank. This plate exhibits excellent heat conduction properties, enabling rapid and uniform transfer of the cooling energy generated by the evaporator to the cooling water tank, thereby cooling the cooling water within the tank. The refrigeration chamber is also connected to a cold air inlet pipe. This means that when the evaporator is operating, it not only cools the cooling water but also allows outside air to be introduced into the refrigeration chamber through the cold air inlet pipe for cooling. The cooled air is then transported to the spiral cooling pipe, where it can replace the cooling water to cool the furnace brick lining when needed. The combination of the refrigeration chamber and the cooling plate significantly improves the cooling efficiency of the cooling water tank, maintaining a low cooling water temperature and maintaining a high cooling effect throughout the cooling cycle. The continuously low-temperature cooling water helps reduce thermal stress in the furnace brick lining, slowing its aging due to high temperatures, thereby extending the service life of the furnace lining and the entire submerged arc furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 This is a three-dimensional diagram of the spiral cooling tube of the present invention;

[0019] Figure 4 It is a bottom view of the cooling water storage tank of the present utility model.

[0020] In the figure: 1. Furnace body; 2. Iron outlet; 3. Cooling inlet pipe; 4. Cold air inlet pipe; 5. Cooling water inlet pipe; 6. Air pump; 7. Circulation pump; 8. Cooling outlet pipe; 9. Cooling water outlet pipe; 10. Exhaust pipe; 11. Cooling water storage tank; 12. Furnace brick lining; 13. Spiral cooling pipe; 14. Refrigeration chamber; 15. Cold guide plate; 16. Evaporator; 17. Heat dissipation chamber; 18. Condenser; 19. Compressor. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] See also Figure 1-4 The utility model provides an embodiment: a lining cooling device for an electric arc furnace, comprising a furnace body 1, a tapping port 2 being provided at the lower end of the other side of the furnace body 1; a furnace brick lining 12 being provided in the inner wall of the furnace body 1, and a spiral cooling pipe 13 being provided on the inner wall of the furnace brick lining 12, the spiral cooling pipe 13 being made of stainless steel, a cooling inlet pipe 3 being provided at one end of the spiral cooling pipe 13, a cooling outlet pipe 8 being provided at the other end of the spiral cooling pipe 13, and both the cooling inlet pipe 3 and the cooling outlet pipe 8 extending to the outside of the furnace body 1, the other end of the cooling inlet pipe 3 being connected to a cold air inlet pipe 4 and a cooling water inlet pipe 5 through a three-way valve, and the other end of the cooling outlet pipe 8 being connected to a cooling water outlet pipe 9 and an exhaust pipe 10 through a three-way valve.

[0023] This system leverages the efficient initial cooling capacity of water cooling and the stability of air cooling over long periods of operation. When the cooling water temperature is low and the cooling effect is optimal, water cooling is prioritized to rapidly reduce the temperature of the furnace brick lining. As the cooling water temperature rises and the cooling effect weakens, it automatically switches to air cooling, ensuring continuous and stable cooling of the furnace lining and avoiding the loss of cooling efficiency caused by excessively high cooling water temperatures.

[0024] See also Figure 1 and Figure 2 A cooling water storage tank 11 is provided on one side of the furnace body 1. One end of the cooling water inlet pipe 5 and the cooling water outlet pipe 9 are connected to the water storage cavity of the cooling water storage tank 11. A circulating pump 7 is installed on the outside of the cooling water inlet pipe 5. A sealing cover is provided on one side of the top of the cooling water storage tank 11. During the flow of cooling water, heat exchange is formed with the furnace brick lining 12, thereby reducing the temperature of the furnace brick lining.

[0025] See also Figure 1 and Figure 2A refrigeration chamber 14 is provided below the water storage chamber in the cooling water storage tank 11. One side of the refrigeration chamber 14 is connected to the cold air inlet pipe 4, and an air inlet grille is provided on the other side of the refrigeration chamber 14. An air pump 6 is installed outside the cold air inlet pipe 4 to cool the furnace brick lining instead of cooling water, which can ensure the stability of the cooling of the furnace body 1 and at the same time give the cooling water time in the cooling water storage tank 11 to provide a guarantee for subsequent efficient cooling.

[0026] See also Figure 4 An evaporator 16 is installed inside the refrigeration cavity 14, and a cold guide plate 15 is provided on the top of the refrigeration cavity 14. The cold guide plate 15 serves as the bottom plate of the water storage cavity in the cooling water storage tank 11. A heat dissipation cavity 17 is provided at the bottom of the cooling water storage tank 11. A condenser 18, a compressor 19 and an expansion valve are respectively provided inside the heat dissipation cavity 17. The condenser 18, the compressor 19, the expansion valve and the evaporator 16 are connected by pipes to maintain a high cooling effect throughout the cooling cycle. The continuous low-temperature cooling water helps to reduce the thermal stress of the furnace brick lining and reduce its aging rate due to high temperature, thereby extending the service life of the furnace lining and the entire submerged arc furnace.

[0027] Working principle: When in use, heat is absorbed through the circulating evaporation process of the refrigerant, thereby generating cold energy. A cold conduction plate 15 is provided between the refrigeration chamber 14 and the cooling water storage tank 11. The cold conduction plate has good heat conduction performance and can quickly and evenly transfer the cold energy generated by the evaporator 16 to the inside of the cooling water storage tank 11, thereby cooling the cooling water in the storage tank. The spiral cooling pipe 13, the cooling water inlet pipe 5 and the cooling water outlet pipe 9 are connected through the three-way valve. By turning on the circulation pump 7, the cooling water is sent into the interior of the spiral cooling pipe 13 through the cooling inlet pipe 3. During the flow process, heat exchange is formed with the furnace brick lining 12, thereby reducing the temperature of the furnace brick lining. At the same time, the refrigeration chamber 14 is also connected to the cold air inlet pipe 4. When the evaporator 16 is working, it can not only It can cool the cooling water and introduce external air into the refrigeration chamber 14 through the cold air inlet pipe for cooling. As the water circulation time increases, the cooling water temperature will also increase, resulting in a worse cooling effect on the furnace brick lining 12. At this time, the cooling water inlet pipe 5 and the cooling water outlet pipe 9 are closed by the three-way valve, and the cold air inlet pipe 4 and the exhaust pipe 10 are connected to the spiral cooling pipe 13. At this time, the air pump 6 is turned on to transport external air to the spiral cooling pipe to cool the furnace brick lining instead of cooling water. Although the cooling performance is not as good as cooling water in a low temperature state, compared with cooling water that absorbs more heat, it can ensure the stability of the cooling of the furnace body, and at the same time give the cooling water time in the cooling water storage tank 11, providing a guarantee for subsequent efficient cooling.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A lining cooling device for a submerged arc furnace, comprising a furnace body (1); characterized in that: A furnace brick lining (12) is provided in the inner wall of the furnace body (1), and a spiral cooling pipe (13) is provided on the inner wall of the furnace brick lining (12). A cooling inlet pipe (3) is provided at one end of the spiral cooling pipe (13), and a cooling outlet pipe (8) is provided at the other end of the spiral cooling pipe (13). Both the cooling inlet pipe (3) and the cooling outlet pipe (8) extend to the outside of the furnace body (1). The other end of the cooling inlet pipe (3) is connected to a cold air inlet pipe (4) and a cooling water inlet pipe (5) through a three-way valve, and the other end of the cooling outlet pipe (8) is connected to a cooling water outlet pipe (9) and an exhaust pipe (10) through a three-way valve.

2. The submerged arc furnace lining cooling device according to claim 1, characterized in that: A cooling water storage tank (11) is provided on one side of the furnace body (1), one end of the cooling water inlet pipe (5) and one end of the cooling water outlet pipe (9) are connected to the water storage chamber of the cooling water storage tank (11), and a circulating pump (7) is installed outside the cooling water inlet pipe (5).

3. The submerged arc furnace lining cooling device according to claim 2, characterized in that: A refrigeration chamber (14) is provided below the water storage chamber in the cooling water storage tank (11), one side of the refrigeration chamber (14) is connected to the cold air inlet pipe (4), and an air inlet grille is provided on the other side of the refrigeration chamber (14), and an air pump (6) is installed outside the cold air inlet pipe (4).

4. The submerged arc furnace lining cooling device according to claim 3, characterized in that: An evaporator (16) is installed inside the refrigeration cavity (14), a cold guide plate (15) is provided on the top of the refrigeration cavity (14), and the cold guide plate (15) serves as the bottom plate of the water storage cavity in the cooling water storage tank (11), a heat dissipation cavity (17) is provided at the bottom of the cooling water storage tank (11), and a condenser (18), a compressor (19) and an expansion valve are respectively provided inside the heat dissipation cavity (17), and the condenser (18), the compressor (19), the expansion valve and the evaporator (16) are connected by pipelines.

5. The submerged arc furnace lining cooling device according to claim 2, characterized in that: A sealing cover is provided on one side of the top end of the cooling water storage tank (11).

6. The submerged arc furnace lining cooling device according to claim 1, characterized in that: An iron outlet (2) is provided at the lower end of the other side of the furnace body (1).

7. The submerged arc furnace lining cooling device according to claim 1, characterized in that: The spiral cooling tube (13) is made of stainless steel.

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