Direct current type ore smelting furnace bottom temperature control device

Abstract

This utility model relates to the field of electric arc furnace technology, and in particular to a direct-flow electric arc furnace bottom temperature control device, comprising a furnace shell, wherein the inner bottom of the furnace shell is sequentially laid with an insulating asbestos board, a high-alumina aggregate layer, a three-stage high-alumina brick layer, a one-stage high-alumina brick layer, a prebaked carbon brick layer, and a clay brick layer from bottom to top. A cooling component is provided in the three-stage high-alumina brick layer. The cooling component includes an air inlet pipe, an air outlet pipe, an air conveying pipe, and a blower. The air outlet pipe is located in the three-stage high-alumina brick layer. One end of the air inlet pipe is inserted into the air outlet pipe and extends to the inner bottom of the air outlet pipe. Several air inlet pipes on the same side are connected to an air conveying pipe, which is connected to the blower. This utility model realizes the cooling of the bottom of the direct-flow electric arc furnace, avoids the rapid heating and cooling of the bottom temperature, thereby preventing the prebaked carbon bricks at the bottom from warping and causing the bottom brick floating accident, and extends the service life of the electric arc furnace. It has broad application prospects in the field of electric arc furnace technology.

Description

Technical Field

[0001] This utility model relates to the field of electric arc furnace technology, and in particular to a direct-flow electric arc furnace bottom temperature control device. Background Technology

[0002] A DC submerged arc furnace is a key piece of equipment used in metal smelting, and its temperature control is crucial for the stability and efficiency of the production process. The design and implementation of the temperature control system directly affect the reduction rate of ore inside the furnace, the metal extraction efficiency, and the overall production cost.

[0003] During the smelting process, molten metal minerals accumulate at the bottom of the furnace, causing rapid temperature fluctuations at the bottom. This can lead to the lifting of carbon bricks at the bottom of the furnace, resulting in a brick floating accident. This not only shortens the service life of the equipment, but also poses a great safety hazard if not detected in time. Therefore, a device is needed to solve the above problems. Utility Model Content

[0004] To address the problem that molten metal minerals accumulate at the bottom of the furnace during smelting, causing rapid temperature fluctuations and resulting in the lifting of carbon bricks at the furnace bottom, leading to a brick floating accident, which not only shortens the service life of the equipment but also poses a significant safety hazard if not detected in time, a direct-flow submerged arc furnace bottom temperature control device has been invented.

[0005] The technical solution of this utility model is a DC-type submerged arc furnace bottom temperature control device, including a furnace shell. The inner bottom of the furnace shell is laid with an insulating asbestos board, a high-alumina aggregate layer, a three-level high-alumina brick layer, a one-level high-alumina brick layer, a prebaked carbon brick layer, and a clay brick layer from bottom to top. A cooling component is provided in the three-level high-alumina brick layer. The cooling component includes an air inlet pipe, an air outlet pipe, an air conveying pipe, and a blower. The air outlet pipe is set in the three-level high-alumina brick layer. One end of the air inlet pipe is inserted into the air outlet pipe and extends to the inner bottom of the air outlet pipe. Several air inlet pipes on the same side are connected to an air conveying pipe, and the air conveying pipe is connected to the blower.

[0006] Preferably, the end face of the third-level high-alumina brick layer near the first-level high-alumina brick layer is provided with several embedded grooves, the air outlet pipe and the air inlet pipe are arranged in the embedded grooves, and the embedded groove outside the air outlet pipe is filled with dry sealing ramming material.

[0007] Preferably, the several air outlet pipes on both sides are arranged opposite each other on the same straight line, and the several air outlet pipes on both sides are arranged symmetrically.

[0008] Preferably, the several air outlet pipes on both sides are arranged in an alternating manner, and the several air outlet pipes on both sides penetrate the bottom of the electric arc furnace.

[0009] Preferably, the several air outlet pipes on both sides are arranged in a U-shape and have only one opening, and the several air outlet pipes on both sides are arranged symmetrically.

[0010] Preferably, each of the air inlet pipes has several connecting rings connected to its outer surface, and each connecting ring has several connecting blocks connected to it. The end face of each connecting block near the air outlet pipe has several rolling grooves, and each rolling groove has a ball bearing. The ball bearing protrudes from the rolling groove and contacts the inner wall of the air outlet pipe.

[0011] The following beneficial effects can be achieved by adopting the technical solution of this utility model: (1) By layering the insulating asbestos board, high alumina aggregate layer, three-level high alumina brick layer, one-level high alumina brick layer, prebaked carbon brick layer and clay brick layer, a complete inner lining is formed at the bottom of the electric arc furnace, ensuring that the electric arc furnace can stably receive molten metal when smelting metal; (2) By using the cooling component, the temperature of the furnace bottom of the electric arc furnace can be adjusted, avoiding the rapid heating and cooling of the furnace bottom, which would cause the prebaked carbon bricks at the furnace bottom to lift up, resulting in a furnace bottom brick floating accident, thus extending the service life of the electric arc furnace; (3) By using the connection block and the ball bearing, the air inlet pipe can quickly enter and exit the air outlet pipe, and the air inlet pipe can always be located on the axis of the air outlet pipe; The technical solution of this utility model has a wide application prospect in the field of electric arc furnace technology. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the DC-type submerged arc furnace bottom temperature control device of this utility model.

[0013] Figure 2 for Figure 1 Enlarged view of a portion of region A in the middle.

[0014] Figure 3 The distribution structure of the cooling components of the DC-type submerged arc furnace bottom temperature control device of this utility model is shown in section 1.

[0015] Figure 4 The distribution structure of the cooling components of the DC-type submerged arc furnace bottom temperature control device of this utility model is shown in section 2.

[0016] Figure 5 The distribution structure of the cooling components of the DC-type submerged arc furnace bottom temperature control device of this utility model is shown in section 3.

[0017] Figure 6 This is a vertical cross-sectional view of the cooling component of the DC-type submerged arc furnace bottom temperature control device of this utility model.

[0018] Figure 7 This is a cross-sectional view of the cooling component of the DC-type submerged arc furnace bottom temperature control device of this utility model.

[0019] Among them, 1. Furnace shell, 2. Insulating asbestos board, 3. High alumina aggregate layer, 4. Dry sealing ramming material layer, 5. Grade III high alumina brick layer, 6. Embedded groove, 7. Air outlet pipe, 8. Air inlet pipe, 9. Dry sealing ramming material, 10. Grade I high alumina brick layer, 11. Prebaked carbon brick layer, 12. Clay brick layer, 13. Air conveying pipe, 14. Connecting ring, 15. Connecting block, 16. Rolling groove, 17. Ball bearing. Detailed Implementation

[0020] The technical solutions of various embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] This application discloses a DC-type submerged arc furnace bottom temperature control device. (Refer to...) Figure 1 , Figure 2The furnace shell 1 has an inner bottom layer consisting of an insulating asbestos board 2, a high-alumina aggregate layer 3, a three-stage high-alumina brick layer 5, a one-stage high-alumina brick layer 10, a prebaked carbon brick layer 11, and a clay brick layer 12, laid sequentially from bottom to top. A dry-sealed ramming material layer 4 is provided between the three-stage high-alumina brick layer 5, the one-stage high-alumina brick layer 10, the prebaked carbon brick layer 11, and the clay brick layer 12 and the insulating asbestos board 2. This arrangement of the insulating asbestos board 2, the high-alumina aggregate layer 3, the dry-sealed ramming material layer 4, the three-stage high-alumina brick layer 5, the one-stage high-alumina brick layer 10, the prebaked carbon brick layer 11, and the clay brick layer 12 forms a complete inner lining of the submerged arc furnace bottom, ensuring that the submerged arc furnace can stably receive molten metal during metal smelting.

[0023] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The three-level high-alumina brick layer 5 is equipped with a cooling component, which actively cools the furnace bottom of the electric arc furnace. This prevents the carbon bricks from warping due to rapid temperature changes when the furnace bottom receives molten metal, thus preventing furnace bottom brick floating accidents and extending the service life of the equipment. Specifically, the end face of the three-level high-alumina brick layer 5 near the first-level high-alumina brick layer 10 has several embedded grooves 6. These grooves 6 are evenly arranged in rows within the three-level high-alumina brick layer 5. The cooling component is partially installed in the embedded grooves 6, facilitating its placement and limiting its position. The cooling component includes an inlet pipe 8, an outlet pipe 7, an air conveying pipe 13, and a blower. The outlet pipe 7 is installed within the three-level high-alumina brick layer 5, and the space between the outlet pipe 7 and the embedded groove 6 is filled with dry sealing ramming material 9. This positions the outlet pipe 7 within the embedded groove 6 and prevents it from moving freely within the groove. One end of the air inlet pipe 8 is inserted into the air outlet pipe 7 and extends to the bottom of the air outlet pipe 7, allowing low-temperature cold airflow to be delivered from the air inlet pipe 8 into the air outlet pipe 7. As the airflow exits from the air outlet pipe 7, it absorbs heat transferred from the bottom of the electric arc furnace, thus cooling the furnace bottom. Several air inlet pipes 8 on the same side are connected to a single air conveying pipe 13, facilitating the simultaneous delivery of cold airflow from one air conveying pipe 13 to several air inlet pipes 8 on the same side. The air conveying pipe 13 is connected to a blower, allowing cold air to be drawn from the outside by powering on the blower and then delivered to the several air inlet pipes 8 through the air conveying pipe 13.

[0024] Reference Figure 3 The two air outlet pipes 7 are arranged opposite each other on the same straight line and are symmetrically distributed. This can shorten the overall length of the air outlet pipe 7, so that the cold air transported by the air inlet pipe 8 can be quickly discharged through the air outlet pipe 7. This can quickly remove the heat dissipated from the bottom of the electric arc furnace into the air outlet pipe 7, thereby improving the cooling efficiency of the bottom of the electric arc furnace.

[0025] Reference Figure 4The air outlet pipes 7 on both sides are staggered, and several air outlet pipes 7 on both sides penetrate the bottom of the electric arc furnace, so that each air outlet pipe 7 can penetrate the bottom of the electric arc furnace in a straight line. This allows the airflow delivered from the air inlet pipe 8 to the air outlet pipe 7 to fully absorb the heat emitted from the bottom of the electric arc furnace, thereby carrying out a large amount of heat and cooling the bottom of the electric arc furnace.

[0026] Reference Figure 5 Several air outlet pipes 7 on both sides are arranged in a U-shape with only one opening. The air outlet pipes 7 on both sides are symmetrically arranged, which increases the length of the air outlet pipes 7 and the area through which the air outlet pipes 7 pass by. This allows the airflow delivered from the air inlet pipe 8 to the air outlet pipe 7 to fully absorb the heat emitted from the bottom of the electric arc furnace, thereby carrying out a large amount of heat and cooling the bottom of the electric arc furnace.

[0027] Reference Figure 6 , Figure 7 Each air inlet pipe 8 has several connecting rings 14 detachably fixed to its outer surface by bolts. These connecting rings 14 are evenly connected to the air inlet pipe 8, forming a single unit. Each connecting ring 14 has several connecting blocks 15 detachably fixed to it by bolts. These connecting blocks 15 are evenly connected in a ring on the outer surface of the connecting ring 14, forming a single unit. Several rolling grooves 16 are formed on the end face of the connecting block 15 near the air outlet pipe 7. Each rolling groove 16 contains a ball bearing 17, which is confined by the rolling groove 16 without affecting the rotation of the ball bearing 17 within the rolling groove 16. The ball bearing 17 protrudes from the rolling groove 16 and contacts the inner wall of the air outlet pipe 7. This reduces the friction between the connecting block 15 and the inner wall of the air outlet pipe 7. The connecting ring 14, several connecting blocks 15, and the ball bearing 17 then confine the air inlet pipe 8 to the axis of the air outlet pipe 7. This allows the airflow from the air inlet pipe 8 to pass evenly through the air outlet pipe 7, thus carrying the heat dissipated from the bottom of the submerged arc furnace into the air outlet pipe 7 out of the submerged arc furnace and cooling the bottom of the submerged arc furnace.

[0028] Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components, and the structural settings, working methods or control methods involved are all conventional settings, working methods or control methods in the art unless otherwise specified.

[0029] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A direct-flow submerged arc furnace bottom temperature control device, comprising a furnace shell (1), wherein, The inner bottom of the furnace shell (1) is laid with an insulating asbestos board (2), a high-alumina aggregate layer (3), a three-level high-alumina brick layer (5), a first-level high-alumina brick layer (10), a prebaked carbon brick layer (11), and a clay brick layer (12) from bottom to top. The three-level high-alumina brick layer (5) is equipped with a cooling component, which includes a blower and several air inlet pipes (8), air outlet pipes (7), and air conveying pipes (13). The air outlet pipes (7) are set in the three-level high-alumina brick layer (5). One end of the air inlet pipe (8) is inserted into the air outlet pipe (7) and extends to the inner bottom of the air outlet pipe (7). Several air inlet pipes (8) on the same side are connected to an air conveying pipe (13), which is connected to the blower.

2. The DC-type submerged arc furnace bottom temperature control device according to claim 1, characterized in that, The third-level high-alumina brick layer (5) has several embedded grooves (6) on the end face near the first-level high-alumina brick layer (10). The air outlet pipe (7) and the air inlet pipe (8) are set in the embedded grooves (6). The embedded grooves (6) outside the air outlet pipe (7) are filled with dry sealing ramming material (9).

3. The DC-type submerged arc furnace bottom temperature control device according to claim 1, characterized in that, Several air outlet pipes (7) on both sides are arranged opposite each other on the same straight line, and several air outlet pipes (7) on both sides are arranged symmetrically.

4. The DC-type submerged arc furnace bottom temperature control device according to claim 1, characterized in that, Several air outlet pipes (7) on both sides are staggered and penetrate the bottom of the electric arc furnace.

5. The DC-type submerged arc furnace bottom temperature control device according to claim 1, characterized in that, The air outlet pipes (7) on both sides are arranged in a U-shape and have only one opening. The air outlet pipes (7) on both sides are arranged symmetrically.

6. The DC-type submerged arc furnace bottom temperature control device according to claim 1, characterized in that, Each of the air inlet pipes (8) has several connecting rings (14) connected to its outer surface. Each connecting ring (14) has several connecting blocks (15) connected to it. The connecting blocks (15) have several rolling grooves (16) on their end faces near the air outlet pipes (7). Each rolling groove (16) has a ball (17) inside it. The ball (17) protrudes from the rolling groove (16) and contacts the inner wall of the air outlet pipe (7).

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