Insulation refractory device for the middle part of electric arc furnace

Abstract

The utility model discloses a heat-insulating refractory device for the middle part of an electric arc furnace, including an electric arc furnace body and refractory bricks, a cantilever frame is fixedly connected to the inner wall of the middle part of the electric arc furnace body, and a vertical frame is welded to the other end of the cantilever frame, and a fixing rod is welded to the other side surface of the vertical frame, a side groove is provided on the other end surface of the fixing rod, and a clamping block is slidably connected inside the side groove, and the clamping block is connected to the inner wall of the side groove through a spring, and a jack is provided on one side surface of the refractory brick corresponding to the position of the fixing rod. Beneficial effect: The utility model adopts a cantilever frame, a vertical frame and refractory bricks arranged in a ring, the cantilever frame is fixedly connected to the inner wall of the electric arc furnace body, the vertical frame is fixedly connected to the other end of the cantilever frame, the refractory bricks are fixedly connected to the vertical frame through a fixing rod, and the refractory bricks are formed in a dry hanging form, surrounding the middle part of the electric arc furnace body, and the middle part of the electric arc furnace body is insulated and heat-insulated, thereby reducing heat loss, being more energy-saving and environmentally friendly, and prolonging the service life of the electric arc furnace body.

Description

Technical Field

[0001] The utility model relates to the technical field of electric arc furnaces, in particular to a heat-insulating refractory device for the middle part of an electric arc furnace. Background Art

[0002] In metal industry manufacturing, electric arc furnaces are commonly used for metallurgical production. Electric arc furnaces are electric furnaces that use the high temperature generated by electrode arcs to melt ores and metals. They have the advantages of high arc heating temperature and concentrated energy.

[0003] After searching, it was found that the publication number is CN212620035U, and the name is an electric arc furnace. The application proposes an electric arc furnace structure, which utilizes the arc phenomenon between electrodes to melt the raw materials into molten metal. If it is necessary to continue to add raw materials to the furnace body, the materials are first stored in the feed hopper, and then the feeding motor is started to drive the spiral feeding structure to transport the materials, so that the materials are transported into the furnace body to complete the continuous addition; during the entire adding process, the furnace cover does not need to be opened to ensure the relative closure of the smelting in the furnace, improve the safety of smelting production, and the amount of raw material added is more accurate and controllable. In addition, it is avoided that the furnace cover needs to be opened to make the inner cavity of the furnace body completely open, so that the smelting raw materials can fall into it. The control process of adding materials is simpler, and the smelting production process realizes continuous operation. However, the application lacks internal thermal insulation measures. In the actual use process, the temperature inside the furnace body is very high. Due to the large surface area of ​​the furnace body, a large amount of heat diffuses outward, resulting in a large amount of heat loss and waste, which is not energy-saving and environmentally friendly. At the same time, long-term high-temperature roasting will also affect the service life of the furnace shell, and further improvements can be made.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a thermal insulation and refractory device for the middle part of an electric arc furnace, which has the advantages of energy saving and environmental protection, extended service life, and easy maintenance and replacement, thereby solving the problems in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above advantages of energy saving and environmental protection, extended service life, and easy maintenance and replacement, the specific technical solutions adopted by the utility model are as follows:

[0009] The heat-insulating refractory device for the middle part of an electric arc furnace comprises an electric arc furnace body and refractory bricks, a cantilever frame is fixedly connected to the inner wall of the middle part of the electric arc furnace body, a vertical frame is welded to the other end of the cantilever frame, and a fixing rod is welded to the other side surface of the vertical frame, a side groove is provided on the other end surface of the fixing rod, and a clamping block is slidably connected inside the side groove, and the clamping block is connected to the inner wall of the side groove through a spring, a plug hole is provided on the surface of one side of the refractory brick corresponding to the position of the fixing rod, and an inner ring groove is provided on the inner wall of the plug hole corresponding to the position of the clamping block, and an electric arc furnace upper cover is installed on the top surface of the electric arc furnace body.

[0010] Furthermore, the cantilever frames and vertical frames are arranged in a ring shape, and the number of the cantilever frames is 2-3 times the number of the vertical frames.

[0011] Furthermore, the refractory bricks are arranged in a ring shape, and the refractory bricks are fitted to each other.

[0012] Furthermore, the number of the fixing rods is twice the number of the refractory bricks, and the refractory bricks are formed by consolidating refractory materials.

[0013] Furthermore, two ends of the spring are fixedly connected to the clamping block and the side groove respectively, and the spring is made of high manganese steel.

[0014] Furthermore, a bell mouth is provided at an opening at one end of the jack.

[0015] Furthermore, the other end of the block is provided with an inclined surface, and the inclined surface extends out of a side groove.

[0016] Furthermore, the inner diameter of the insertion hole is equal to the outer diameter of the fixing rod.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a heat-insulating refractory device for the middle part of an electric arc furnace, which has the following beneficial effects:

[0019] (1) The utility model adopts a ring-shaped arrangement of a cantilever frame, a vertical frame and refractory bricks. The cantilever frame is fixedly connected to the inner wall of the electric arc furnace body, the vertical frame is fixedly connected to the other end of the cantilever frame, and the refractory bricks are fixedly connected to the vertical frame through a fixing rod. The refractory bricks are formed in a dry hanging form and surround the middle part of the electric arc furnace body to keep the middle part warm and insulate the heat, thereby reducing heat loss, being more energy-saving and environmentally friendly, and extending the service life of the electric arc furnace body.

[0020] (2) The utility model adopts a fixing rod, and a clamping block is arranged at the other end of the fixing rod. A socket for the fixing rod to be inserted is provided on one side surface of the refractory brick, and an inner ring groove for clamping with the clamping block is provided on the inner wall of the socket. When installing the refractory brick, the socket can be aligned with the fixing rod. Then, the refractory brick is moved to the fixing rod and inserted into the socket. The clamping block is squeezed by the socket and enters the side groove. The spring is compressed until the clamping block is aligned with the inner ring groove. The spring rebounds and pushes the clamping block into the inner ring groove. The fast installation and fixing can be completed, which saves the trouble of using mortar bonding for the staff. When replacing, the damaged refractory bricks can be broken and reinstalled with new refractory bricks. The installation and disassembly is very convenient, which greatly facilitates the installation and maintenance of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a heat-insulating refractory device for the middle part of an electric arc furnace proposed by the utility model;

[0023] Figure 2 It is a distribution diagram of the cantilever frame and the vertical frame proposed by the utility model;

[0024] Figure 3 It is an enlarged view of the A node of the heat-insulating refractory device for the middle part of the electric arc furnace proposed by the utility model;

[0025] Figure 4 It is a schematic diagram of the external structure of the fixing rod proposed by the utility model.

[0026] In the figure:

[0027] 1. Electric arc furnace body; 2. Cantilever frame; 3. Vertical frame; 4. Refractory bricks; 5. Fixed rod; 6. Socket; 7. Bell mouth; 8. Side groove; 9. Spring; 10. Block; 11. Inner ring groove; 12. Upper cover of electric arc furnace. DETAILED DESCRIPTION

[0028] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] According to an embodiment of the utility model, a heat-insulating refractory device for the middle part of an electric arc furnace is provided.

[0030] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-4 As shown, according to the embodiment of the utility model, the heat-insulating refractory device for the middle part of the electric arc furnace comprises an electric arc furnace body 1 and refractory bricks 4, a cantilever frame 2 is fixedly connected to the inner wall of the middle part of the electric arc furnace body 1, one end of the cantilever frame 2 is welded to the inner wall of the middle part of the electric arc furnace body 1, and a vertical frame 3 is welded to the other end of the cantilever frame 2, and a fixing rod 5 is welded to the other side surface of the vertical frame 3, and a side groove 8 is opened on the other end surface of the fixing rod 5, and a clamping block 10 is slidably connected inside the side groove 8, and the clamping block 10 is connected to the fixing rod 5 through a spring 9. The inner wall of the side groove 8 is connected, a plug hole 6 is opened on one side surface of the refractory brick 4 corresponding to the position of the fixing rod 5, and an inner ring groove 11 is opened on the inner wall of the plug hole 6 corresponding to the position of the block 10, and the inner ring groove 11 is annular, and an arc furnace cover 12 is installed on the top surface of the arc furnace body 1. It is a common structure. The refractory bricks 4 are arranged in multiple layers from top to bottom, and the refractory bricks 4 at the top and the bottom are arranged obliquely, and the other ends of the refractory bricks 4 at the top and the bottom are tightly against the inner wall of the arc furnace body 1, and adopt The refractory castable is sealed, and the refractory bricks 4 are formed into a dry hanging form, surrounding the middle part of the arc furnace body 1, and the middle part of the arc furnace body 1 is insulated and heat-insulated, thereby reducing heat loss, being more energy-saving and environmentally friendly, and extending the service life of the arc furnace body 1. At the same time, a socket 6 for the fixing rod 5 to be plugged into is provided on the surface of one side of the refractory brick 4, and an inner ring groove 11 is provided on the inner wall of the socket 6 to be plugged into the card block 10. When installing the refractory brick 4, the socket 6 can be aligned with the fixing rod 5. Then, the refractory brick 4 is moved to the fixing rod 5 and inserted into the socket 6. The card block 10 is squeezed by the socket 6 and enters the side groove 8. The spring 9 is compressed until the card block 10 is aligned with the inner ring groove 11. The spring 9 rebounds and pushes the card block 10 to be stuck in the inner ring groove 11, so that quick installation and fixation can be completed, eliminating the trouble of the staff using mortar bonding. When replacing, the broken and damaged refractory bricks 4 can be reinstalled with new refractory bricks 4. The installation and disassembly is very convenient, which greatly facilitates the installation and maintenance of the staff.

[0031] In one embodiment, the cantilever frames 2 and the vertical frames 3 are arranged in a ring shape, and the number of the cantilever frames 2 is 2-3 times the number of the vertical frames 3, so as to facilitate the stable installation of the vertical frames 3.

[0032] In one embodiment, the refractory bricks 4 are arranged in a ring shape, and the refractory bricks 4 are fitted together, and the gaps are sealed with refractory castables.

[0033] In one embodiment, the number of the fixing rods 5 is twice the number of the refractory bricks 4, and the refractory bricks 4 are made of refractory materials and are common refractory components, which will not be described in detail here.

[0034] In one embodiment, both ends of the spring 9 are fixedly connected to the block 10 and the side groove 8 respectively to prevent the block 10 from falling off, and the spring 9 is made of high manganese steel, which is resistant to high temperatures and convenient for repeated use.

[0035] In one embodiment, a bell mouth 7 is provided at an opening of one end of the insertion hole 6 to facilitate alignment with the fixing rod 5 .

[0036] In one embodiment, a slope is formed at the other end of the block 10 , and the slope extends out of the side groove 8 , so that the block 10 can enter the side groove 8 after being squeezed by the insertion hole 6 .

[0037] In one embodiment, the inner diameter of the insertion hole 6 is equal to the outer diameter of the fixing rod 5, so as to reduce the shaking phenomenon after installation.

[0038] Working principle:

[0039] The refractory bricks 4 are formed in a dry hanging form, surrounding the middle part of the arc furnace body 1, and insulating and heat-insulating the middle part of the arc furnace body 1, thereby reducing heat loss, being more energy-saving and environmentally friendly, and extending the service life of the arc furnace body 1. At the same time, a socket 6 for the fixing rod 5 to be plugged into is provided on the surface of one side of the refractory brick 4, and an inner ring groove 11 that is engaged with the block 10 is provided on the inner wall of the socket 6. When installing the refractory brick 4, the socket 6 can be aligned with the fixing rod 5. Then, the refractory brick 4 is moved to the fixing rod 5 and inserted into the socket 6. The block 10 is squeezed by the socket 6 and enters the side groove 8. The spring 9 is compressed until the block 10 is aligned with the inner ring groove 11. The spring 9 rebounds and pushes the block 10 to be stuck in the inner ring groove 11, so that quick installation and fixation can be completed, eliminating the trouble of the staff using mortar bonding. When replacing, the broken and damaged refractory bricks 4 can be reinstalled with new refractory bricks 4. The installation and disassembly is very convenient, which greatly facilitates the installation and maintenance of the staff.

[0040] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 heat-insulating refractory device for the middle part of an electric arc furnace, characterized in that: The electric arc furnace comprises an electric arc furnace body (1) and refractory bricks (4), wherein a cantilever frame (2) is fixedly connected to the inner wall of the middle part of the electric arc furnace body (1), and a vertical frame (3) is welded to the other end of the cantilever frame (2), and a fixing rod (5) is welded to the other side surface of the vertical frame (3), and a side groove (8) is provided on the other end surface of the fixing rod (5), and a clamping block (10) is slidably connected inside the side groove (8), and the clamping block (10) is connected to the inner wall of the side groove (8) through a spring (9), a plug hole (6) is provided on one side surface of the refractory brick (4) at a position corresponding to the fixing rod (5), and an inner ring groove (11) is provided on the inner wall of the plug hole (6) at a position corresponding to the clamping block (10), and an electric arc furnace upper cover (12) is installed on the top surface of the electric arc furnace body (1).

2. The heat-insulating refractory device for the middle part of an electric arc furnace according to claim 1, characterized in that: The cantilever frames (2) and the vertical frames (3) are arranged in a ring shape, and the number of the cantilever frames (2) is 2-3 times the number of the vertical frames (3).

3. The heat-insulating refractory device for the middle part of an electric arc furnace according to claim 1, characterized in that: The refractory bricks (4) are arranged in a ring shape, and the refractory bricks (4) are fitted together.

4. The heat-insulating refractory device for the middle part of an electric arc furnace according to claim 1, characterized in that: The number of the fixing rods (5) is twice the number of the refractory bricks (4), and the refractory bricks (4) are formed by consolidating refractory materials.

5. The heat-insulating refractory device for the middle part of an electric arc furnace according to claim 1, characterized in that: The two ends of the spring (9) are fixedly connected to the clamping block (10) and the side groove (8) respectively, and the spring (9) is made of high manganese steel.

6. The heat-insulating refractory device for the middle part of an electric arc furnace according to claim 1, characterized in that: A bell mouth (7) is provided at an opening at one end of the insertion hole (6).

7. The heat-insulating refractory device for the middle part of an electric arc furnace according to claim 1, characterized in that: The other end of the clamping block (10) is provided with an inclined surface, and the inclined surface extends out of the side groove (8).

8. The heat-insulating refractory device for the middle part of an electric arc furnace according to claim 1, characterized in that: The inner diameter of the insertion hole (6) is equal to the outer diameter of the fixing rod (5).

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