Submerged arc furnace lining structure

Abstract

The utility model provides a submerged arc furnace lining structure, and belongs to the technical field of submerged arc furnaces. The submerged arc furnace lining structure comprises a protection assembly and a fixing assembly, a first furnace lining is arranged in a furnace body, a second furnace lining is arranged in the furnace body, firstly, the first furnace lining mainly plays a role in supporting and heat insulation, the temperature of slag iron is reduced through the high heat conduction performance of the second furnace lining, and an effective protection layer is formed; the refractory layer plays a protection role during furnace baking and feeding, if the refractory layer is damaged, the bolts are separated from the furnace body, then the inner barrel is directly taken out from the interior of the furnace body, meanwhile, the refractory layer is taken out from the interior of the furnace body, the refractory layer can be conveniently overhauled or replaced, the inner barrel can be integrally installed and fixed in the furnace body through the bolts, and the inner barrel can be conveniently taken out from the interior of the furnace body. And the inner cylinder and the furnace body can be detached and separated when necessary, so that the refractory layer can be conveniently taken out from the interior of the furnace body, detachment and replacement are very convenient, and the practicability is improved.

Description

Technical Field

[0001] The present application relates to the field of submerged arc furnaces, and in particular to a submerged arc furnace lining structure. Background Art

[0002] Submerged arc furnace is mainly used for reducing and smelting raw materials such as ore, carbonaceous reducing agent and solvent. It mainly produces ferroalloys such as ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, silicon-manganese alloy, etc. It is an important industrial raw material in the metallurgical industry and chemical raw materials such as calcium carbide. The working characteristics of the submerged arc furnace are that the electrode is inserted into the charge for submerged arc operation, and the energy generated by the energy of the arc and the resistance of the charge is used to melt the metal. Under high-intensity smelting conditions, the furnace lining not only bears high heat load and strong thermal shock, but also has to resist the damage to the furnace lining caused by the scouring of the charge and airflow, chemical erosion, etc. The effective way to weaken this destructive effect is to quickly form a stable slag shell on the hot surface of the furnace lining. To achieve this effect, the temperature of the hot surface of the furnace lining must be reduced. For example, a submerged arc furnace lining with Chinese patent application number CN202222895782.2 includes a furnace shell and an inner lining. The furnace shell is composed of a side furnace wall and a furnace bottom. The inner side of the side furnace wall is provided with an inner lining, and the top outer side of the side furnace wall is fixedly connected with an annular water pipe. The top of the annular water pipe A water inlet pipe 1 is fixed on the bottom, nozzles are evenly installed on the bottom of the annular water pipe, an annular cooling water circuit is arranged inside the furnace bottom, a water inlet pipe 2 is fixedly connected to one side of the furnace bottom, one end of the annular cooling water circuit is connected to the water inlet pipe 2; the utility model can cool down the side furnace wall by means of the water inlet pipe 1 in conjunction with the annular water pipe and the nozzle, and realizes gradient cooling of the furnace bottom by means of the water inlet pipe 2 in conjunction with the annular cooling water circuit and the water outlet pipe, and ensures that the hot surface temperature of the refractory material is much lower than the solidification temperature of the metal during the reaction process through this efficient cooling method and a relatively thin carbon furnace lining with good thermal efficiency and high thermal conductivity.

[0003] However, the above scheme still has certain defects: first, the refractory material protective layer is a complete whole fixedly installed in the furnace shell. Once damaged, it is extremely inconvenient to disassemble and replace it, thereby reducing practicality. Utility Model Content

[0004] In order to make up for the above shortcomings, the present application provides a lining structure of an electric arc furnace, aiming to improve the problem in the related technology that the refractory material protective layer is a complete whole fixedly installed in the furnace shell. Once damaged, it is extremely inconvenient to disassemble and replace it, thereby reducing the practicality.

[0005] An embodiment of the present application provides a lining structure of an electric arc furnace including a protection component and a fixing component.

[0006] The protection component includes a furnace body, a first furnace lining and a second furnace lining, the first furnace lining is arranged inside the furnace body, and the second furnace lining is arranged inside the furnace body. The fixing component includes an inner tube, a refractory layer and bolts, the inner tube is in contact with the first furnace lining and the second furnace lining, the refractory layer is arranged inside the inner tube, and a plurality of bolts are arranged on one side of the inner tube, and the bolts are threadedly connected to the furnace body.

[0007] In a specific embodiment, the furnace body includes a furnace bottom and a furnace shell, and the furnace shell is arranged on one side of the furnace bottom.

[0008] In the above implementation process, the furnace bottom and the furnace shell can be mainly used to reduce raw materials such as smelting ore, carbonaceous reducing agent and solvent.

[0009] In a specific implementation manner, a plurality of screw holes are provided at one end of the furnace shell, and the bolts are threadedly connected to the screw holes.

[0010] In the above implementation process, a plurality of screw holes are provided at one end of the furnace shell, and the screw holes can play a role of connection.

[0011] In a specific embodiment, a first discharge pipe is provided on one side of the furnace shell, and the first discharge pipe is connected to the second furnace lining.

[0012] In the above implementation process, a first discharge pipe is provided at one side of the furnace shell, and the first discharge pipe can play a role in discharging materials.

[0013] In a specific embodiment, the first furnace lining includes a high-aluminum refractory brick layer, a graphite brick layer, a high thermal conductivity brick layer and a microporous carbon block layer, the graphite brick layer is arranged on one side of the high-aluminum refractory brick layer, the high thermal conductivity brick layer is arranged on one side of the graphite brick layer, and the microporous carbon block layer is arranged on one side of the high thermal conductivity brick layer.

[0014] In the above implementation process, when working, the high-alumina refractory brick layer mainly plays a supporting and heat-insulating role to protect the furnace bottom. Since the furnace bottom adopts high thermal conductivity material, the heat load of the furnace bottom can be evenly transmitted to the surroundings, effectively reducing the use temperature of the refractory material at the furnace bottom and preventing chemical erosion and molten iron penetration.

[0015] In a specific embodiment, the second furnace lining includes a microporous carbon brick layer and a high thermal conductivity graphite tile layer, and the high thermal conductivity graphite tile layer is arranged on one side of the microporous carbon brick layer.

[0016] In the above implementation process, during operation, the microporous carbon brick layer and the high thermal conductivity graphite tile layer can play a protective role during furnace baking and material feeding.

[0017] In a specific embodiment, a second discharge pipe is provided on one side of the inner tube, the second discharge pipe is communicated with the refractory layer, and the second discharge pipe is in contact with the first discharge pipe.

[0018] In the above implementation process, a second discharge pipe is provided at one side of the inner tube, and the second discharge pipe is provided to be in contact and connected with the first discharge pipe, so as to play a role in discharging materials.

[0019] In a specific implementation, a connecting plate is provided on one side of the inner cylinder, the connecting plate is in contact with the furnace body, and the bolt is rotatably connected to the connecting plate.

[0020] In the above implementation process, a connecting plate is provided on one side of the inner cylinder, and the connecting plate can play a connecting role.

[0021] Compared with the prior art, the present application has the following beneficial effects: first, the first furnace lining mainly plays a supporting and heat-insulating role, the second furnace lining has a high thermal conductivity to reduce the temperature of the slag iron to form an effective protective layer, and the refractory layer plays a protective role during furnace baking and feeding. If the refractory layer is damaged, the bolts can be separated from the furnace body, and then the inner tube can be directly taken out from the inside of the furnace body, and the refractory layer can be taken out from the inside of the furnace body at the same time, so that the refractory layer can be easily inspected or replaced. The inner tube can be installed and fixed inside the furnace body as a whole by bolts, and the inner tube can be disassembled and separated from the furnace body when necessary, so as to facilitate the removal of the refractory layer from the inside of the furnace body, and the disassembly and replacement is extremely convenient, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic structural diagram of a lining structure of an electric arc furnace provided in an embodiment of the present application from a first perspective;

[0024] Figure 2 A schematic diagram of a furnace structure provided for an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of the first furnace lining from a second perspective provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of the structure of the second furnace lining from a third viewing angle provided in an embodiment of the present application;

[0027] Figure 5This is a schematic diagram of the inner cylinder structure provided in an embodiment of the present application.

[0028] In the figure: 100-protection component; 110-furnace body; 111-furnace bottom; 112-furnace shell; 1121-screw hole; 1122-first discharge pipe; 120-first furnace lining; 121-high aluminum refractory brick layer; 122-graphite brick layer; 123-high thermal conductivity brick layer; 124-microporous carbon block layer; 130-second furnace lining; 131-microporous carbon brick layer; 132-high thermal conductivity graphite tile layer; 200-fixing component; 210-inner cylinder; 211-second discharge pipe; 212-connecting plate; 220-refractory layer; 230-bolt. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0030] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] See also Figure 1-5 The present application provides a lining structure of an electric arc furnace, including a protection component 100 and a fixing component 200. The fixing component 200 can facilitate disassembly and installation.

[0032] See also Figure 1-4 The protection component 100 includes a furnace body 110, a first furnace lining 120 and a second furnace lining 130. The first furnace lining 120 is arranged inside the furnace body 110, and the second furnace lining 130 is arranged inside the furnace body 110. The furnace body 110 includes a furnace bottom 111 and a furnace shell 112. The furnace shell 112 is arranged on one side of the furnace bottom 111. The furnace bottom 111 and the furnace shell 112 can be mainly used for reducing and smelting raw materials such as ore, carbonaceous reducing agent and solvent. A plurality of screw holes 1121 are arranged at one end of the furnace shell 112. The bolts 230 are threadedly connected with the screw holes 1121. The screw holes 1121 can play a connecting role.

[0033] In some specific embodiments, a first discharge pipe 1122 is provided on one side of the furnace shell 112, and the first discharge pipe 1122 is connected to the second furnace lining 130. The first discharge pipe 1122 can be provided to discharge materials. The first furnace lining 120 includes a high-aluminum refractory brick layer 121, a graphite brick layer 122, a high thermal conductivity brick layer 123 and a microporous carbon block layer 124. The graphite brick layer 122 is provided on one side of the high-aluminum refractory brick layer 121, the high thermal conductivity brick layer 123 is provided on one side of the graphite brick layer 122, and the microporous carbon block layer 124 is provided on one side of the high thermal conductivity brick layer 123. When working, the high-aluminum refractory brick layer 121 is provided with a high thermal conductivity brick layer 123, and the high thermal conductivity brick layer 123 is provided with a high thermal conductivity brick layer 123. The refractory brick layer 121 mainly plays a supporting and heat-insulating role and is used to protect the furnace bottom 111. Since the furnace bottom 111 adopts high thermal conductivity materials, the heat load of the furnace bottom 111 can be evenly transferred to the surroundings, effectively reducing the use temperature of the refractory materials of the furnace bottom 111 and preventing chemical erosion and molten iron penetration. The second furnace lining 130 includes a microporous carbon brick layer 131 and a high thermal conductivity graphite tile layer 132. The high thermal conductivity graphite tile layer 132 is arranged on one side of the microporous carbon brick layer 131. The microporous carbon brick layer 131 and the high thermal conductivity graphite tile layer 132 can play a protective role when baking the furnace and feeding.

[0034] See also Figure 1 and Figure 5 The fixing assembly 200 includes an inner tube 210, a refractory layer 220 and bolts 230. The inner tube 210 is in contact with the first furnace lining 120 and the second furnace lining 130. The refractory layer 220 is arranged inside the inner tube 210. A plurality of bolts 230 are arranged on one side of the inner tube 210. The bolts 230 are threadedly connected to the furnace body 110. A second discharge pipe 211 is arranged on one side of the inner tube 210. The second discharge pipe 211 is communicated with the refractory layer 220. The second discharge pipe 211 is in contact with the first discharge pipe 1122. The second discharge pipe 211 is in contact and communication with the first discharge pipe 1122, which can play a role in discharging. A connecting plate 212 is arranged on one side of the inner tube 210. The connecting plate 212 is in contact with the furnace body 110. The bolts 230 are rotatably connected to the connecting plate 212. The connection plate 212 can play a connecting role.

[0035] The working principle of the lining structure of the ore-fired furnace: When working, the high-aluminum refractory brick layer 121 mainly plays a supporting and heat-insulating role to protect the furnace bottom 111. Since the furnace bottom 111 adopts a high thermal conductivity material, the heat load of the furnace bottom 111 can be evenly transferred to the surroundings, effectively reducing the use temperature of the refractory material of the furnace bottom 111, preventing chemical erosion and molten iron penetration. The microporous carbon brick layer 131 and the high thermal conductivity graphite tile layer 132 can play a protective role during the furnace baking and charging, forming an effective protective layer, and the refractory layer 220 can play a protective role during the furnace baking and charging. The refractory layer 220 has a protective effect. If the refractory layer 220 is damaged, the inner tube 210 can be directly taken out from the furnace body 110 by separating the bolts 230 from the furnace body 110, and the refractory layer 220 can be taken out from the furnace body 110 at the same time, so that the refractory layer 220 can be easily repaired or replaced. The inner tube 210 can be integrally installed and fixed inside the furnace body 110 by the bolts 230. When necessary, the inner tube 210 can be disassembled and separated from the furnace body 110, so that the refractory layer 220 can be easily taken out from the furnace body 110, and the disassembly and replacement is extremely convenient, thereby improving practicality.

[0036] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0037] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A lining structure of a submerged arc furnace, characterized in that: include A protection assembly (100), the protection assembly (100) comprising a furnace body (110), a first furnace lining (120) and a second furnace lining (130), the first furnace lining (120) being arranged inside the furnace body (110), and the second furnace lining (130) being arranged inside the furnace body (110); A fixing assembly (200), the fixing assembly (200) comprising an inner tube (210), a refractory layer (220) and bolts (230), the inner tube (210) being in contact with the first furnace lining (120) and the second furnace lining (130), the refractory layer (220) being arranged inside the inner tube (210), a plurality of bolts (230) being arranged on one side of the inner tube (210), and the bolts (230) being threadedly connected to the furnace body (110).

2. The lining structure of a submerged arc furnace according to claim 1, characterized in that: The furnace body (110) comprises a furnace bottom (111) and a furnace shell (112), and the furnace shell (112) is arranged on one side of the furnace bottom (111).

3. The lining structure of a submerged arc furnace according to claim 2, characterized in that: A plurality of screw holes (1121) are provided at one end of the furnace shell (112), and the bolts (230) are threadedly connected to the screw holes (1121).

4. The lining structure of a submerged arc furnace according to claim 3, characterized in that: A first discharge pipe (1122) is provided on one side of the furnace shell (112), and the first discharge pipe (1122) is in communication with the second furnace lining (130).

5. The lining structure of a submerged arc furnace according to claim 1, characterized in that: The first furnace lining (120) comprises a high-alumina refractory brick layer (121), a graphite brick layer (122), a high thermal conductivity brick layer (123) and a microporous carbon block layer (124), wherein the graphite brick layer (122) is arranged on one side of the high-alumina refractory brick layer (121), the high thermal conductivity brick layer (123) is arranged on one side of the graphite brick layer (122), and the microporous carbon block layer (124) is arranged on one side of the high thermal conductivity brick layer (123).

6. The lining structure of a submerged arc furnace according to claim 1, characterized in that: The second furnace lining (130) comprises a microporous carbon brick layer (131) and a high thermal conductivity graphite tile layer (132), wherein the high thermal conductivity graphite tile layer (132) is arranged on one side of the microporous carbon brick layer (131).

7. The lining structure of a submerged arc furnace according to claim 4, characterized in that: A second discharge pipe (211) is provided on one side of the inner tube (210), the second discharge pipe (211) is communicated with the refractory layer (220), and the second discharge pipe (211) is in contact with the first discharge pipe (1122).

8. The lining structure of a submerged arc furnace according to claim 1, characterized in that: A connecting plate (212) is provided on one side of the inner cylinder (210), the connecting plate (212) is in contact with the furnace body (110), and the bolt (230) is rotatably connected to the connecting plate (212).

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