Continuous casting furnace for copper melt

Abstract

The utility model relates to the technical field of metal casting, in particular to a continuous casting furnace for copper melt, which comprises a furnace body, an inner cavity of the furnace body is divided into a scum cavity, a mixing cavity and a bottom cavity by a top partition plate and a bottom partition plate, a top through hole is arranged on the top partition plate, and a bottom through hole is arranged on the bottom partition plate. A vacuum pump is mounted on the furnace body, a stirring air supply device is mounted at the top of the furnace body, the stirring air supply device comprises a stirring shaft, a top stirring blade is mounted on the stirring shaft, an air injection channel is formed in the top stirring blade, an inner flow channel is formed in the stirring shaft, a feeding pump is mounted at the top of the furnace body, and an air supply pump is mounted at the top of the furnace body; and the bottom cavity is used for discharging copper liquid through a discharging pipe. According to the device, inert gas and a deoxidizing agent can be effectively and uniformly mixed into copper liquid through the stirring gas supply device, more efficient and thorough deoxidization can be realized by matching with a vacuum pump, and the quality of cast products is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of metal casting technology, specifically to a continuous casting furnace for copper material molten material. Background Technology

[0002] Using a casting furnace to melt copper raw materials for casting to produce various copper products is a common processing method. In this process, the quality of the copper products and the continuous working capacity of the casting furnace will directly affect the production efficiency.

[0003] Patent CN210523769U discloses a continuous casting furnace for copper molten material, which can use a vacuum pump to achieve simple deoxidation of molten copper. However, the following problems affecting production efficiency occur during the use of this equipment:

[0004] 1. The main method is to use a vacuum pump to extract air, but it is difficult to effectively remove oxygen from the molten copper, thus making it impossible to avoid oxygen affecting the quality of the product.

[0005] 2. The lack of effective stratification and internal component isolation of the molten copper makes it impossible for the casting furnace to guarantee the stability of the discharged components. In particular, after reloading, it is necessary to wait for the material to be completely melted again before discharge can continue.

[0006] Therefore, it is difficult to meet the existing continuous casting production needs of copper products. In view of this, this application provides a continuous casting furnace for copper material molten material. Utility Model Content

[0007] This invention provides a continuous casting furnace for copper material molten material, which solves the problems mentioned in the background art.

[0008] This utility model is achieved through the following technical solution: a continuous casting furnace for copper material melting, comprising a furnace body, the inner cavity of which is divided from top to bottom into a slag chamber, a mixing chamber, and a bottom chamber by a top partition and a bottom partition, respectively. The top partition has a top through-hole connecting the slag chamber and the mixing chamber and used to isolate the copper material raw material within the slag chamber, and the bottom partition has a bottom through-hole connecting the mixing chamber and the bottom chamber and used to isolate slag and precipitated slag within the mixing chamber. A vacuum pump is installed on the furnace body for extracting gas from the slag chamber. A stirring and gas supply device is installed on the top of the furnace body. The stirring and gas supply device includes a stirring shaft inserted into the mixing chamber, and a top stirring blade for stirring the liquid in the mixing chamber is installed on the stirring shaft. An air jet channel is provided in the top stirring blade. An inner flow channel connected to the air jet channel is provided in the stirring shaft. A feed pump for feeding deoxidizer into the inner flow channel is installed on the top of the furnace body. An air supply pump is installed on the top of the furnace body. The air supply pump is used to send external inert gas into the air jet channel and then into the mixing chamber. The copper liquid is discharged from the bottom chamber through a discharge pipe.

[0009] Optionally, the bottom of the stirring shaft is inserted into the bottom cavity, and a bottom stirring blade for stirring the liquid in the bottom cavity is installed at the bottom of the stirring shaft.

[0010] Optionally, a driven gear is concentrically mounted on the top of the stirring shaft, and a main motor is fixedly mounted on the furnace body. The output end of the main motor drives a driving wheel that meshes with the driven gear, and the main motor is used to drive the stirring and air supply device to rotate. A controller is installed outside the furnace body, and the main motor, feed pump and air supply pump are electrically connected to the controller.

[0011] Optionally, the top of the scum chamber is connected to an inlet for supplying copper raw materials into the scum chamber, and a first push rod and a second push rod are fixedly installed from top to bottom at the inlet. The output end of the first push rod is equipped with a sealing valve plate for closing the inlet and providing a sealing function, and the output end of the second push rod is equipped with a heat insulation valve plate for closing the inlet and providing a heat insulation function. The first push rod and the second push rod are electrically connected to the controller.

[0012] Optionally, the output end of the feed pump is rotatably sealed to the feed end of the stirring shaft, and an air guide ring is installed on the stirring shaft through the rotatable seal. The interior of the air guide ring is connected to the output end of the air supply pump, and an air inlet is provided on the stirring shaft to connect the interior of the air guide ring and the inner flow channel.

[0013] Optionally, the stirring shaft has an expansion tube integrally formed in the corresponding scum cavity, and a spiral blade is rotatably installed in the expansion tube. The spiral blade is used to rotate under the push of inert gas to mix the deoxidizer and inert gas.

[0014] Optionally, a slag-collecting pipe communicating with the slag chamber is fixedly installed on the top of the furnace body, and the top of the slag-collecting pipe is sealed by a top cover.

[0015] Optionally, the mixing chamber and the bottom chamber are connected by a conical guide plate, and the furnace body is provided with a waste slag chamber for collecting precipitated slag below the corresponding conical guide plate. The conical guide plate is provided with an annular exchange port connecting the mixing chamber and the waste slag chamber, and the annular exchange port is provided with an array of inclined isolation blades for guiding the precipitated slag into the waste slag chamber. The stirring shaft is provided with scraper plates on the inner wall of the corresponding bottom partition and the conical guide plate, and the scraper plates are used to send the precipitated slag in the mixing chamber into the waste slag chamber through the annular exchange port. The waste slag chamber discharges the precipitated slag through a slag discharge pipe.

[0016] Compared with the prior art, the beneficial effects of the continuous casting furnace for copper material provided by this utility model are:

[0017] 1. This utility model can effectively mix inert gas and deoxidizer into the copper liquid through a stirring and gas delivery device. Combined with a vacuum pump, it can achieve more efficient and thorough deoxidation, thus ensuring the quality of the casting products.

[0018] 2. This utility model can separate copper liquid of different compositions by dividing the furnace body into a slag chamber, a mixing chamber, a bottom chamber and a waste slag chamber, thereby making the composition of the discharged copper liquid more stable and facilitating the non-stop cleaning of precipitated slag and slag.

[0019] 3. By completely sealing the furnace body, this utility model not only avoids heat waste but also effectively prevents external air from entering the furnace body, thereby better ensuring the deoxygenation effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a side view of the structure of this utility model;

[0022] Figure 3 This is a cross-sectional view of the structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the stirring and gas delivery device in this utility model.

[0024] In the diagram: 1. Furnace body; 2. Stirring and gas supply device; 201. Inner flow channel; 202. Air inlet; 203. Driven gear; 204. Expansion pipe; 205. Stirring shaft; 206. Top stirring blade; 207. Jet channel; 208. Scraper; 209. Bottom stirring blade; 3. Discharge pipe; 4. Slag discharge pipe; 5. Insulation valve plate; 6. Second push rod; 7. First push rod; 8. Sealing valve plate; 9. Feed inlet; 10. Vacuum pump; 1. Main motor; 12. Feed pump; 13. Air supply pump; 14. Top cover; 15. Slag removal pipe; 16. Controller; 17. Drive wheel; 18. Bottom through hole; 19. Bottom baffle; 20. Annular exchange port; 21. Conical guide plate; 22. Top baffle; 23. Top through hole; 24. Air guide ring; 25. Scum chamber; 26. Mixing chamber; 27. Inclined isolation blades; 28. Waste slag chamber; 29. ​​Bottom chamber; 30. Spiral blades. Detailed Implementation

[0025] To clearly and completely describe the objectives and technical solutions of this utility model, and to more clearly illustrate its advantages, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit 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.

[0026] Example 1: Please refer to Figures 1 to 4This utility model provides a continuous casting furnace for copper material melting, including a furnace body 1. The inner cavity of the furnace body 1 is divided into a slag chamber 25, a mixing chamber 26, and a bottom chamber 29 from top to bottom by a top partition 22 and a bottom partition 19. The top partition 22 is provided with a top through hole 23 that connects the slag chamber 25 and the mixing chamber 26 and is used to isolate the copper material in the slag chamber 25. The copper liquid and slag can freely pass through the top through hole 23, thereby preventing unmelted copper material from directly entering the mixing chamber 26 and being stirred at the top. When the blade 206 collides and is damaged, the scum can float to the scum chamber 25, forming a protective layer that isolates the copper molten metal from the air. During normal operation, the copper molten metal level should be exactly half the height of the scum chamber 25 to ensure that the scum does not remain pressed against the top baffle 22. This also provides sufficient space for the melting of the copper material within the scum chamber 25. Furthermore, the bottom baffle 19 is equipped with a connection between the mixing chamber 26 and the bottom chamber 29, used to isolate the scum and sediment in the mixing chamber. The bottom through-hole 18 inside cavity 26 prevents scum and sediment from entering the bottom cavity 29, thus ensuring a cleaner copper liquid in the bottom cavity 29. A vacuum pump 10 is installed on the furnace body 1 to extract gas from the scum chamber 25. The vacuum pump 10 continuously extracts gas from the fluid, effectively preventing contact between the copper liquid and oxygen, thus facilitating deoxidation. Furthermore, a stirring and gas-feeding device 2 is installed on the top of the furnace body 1, including a stirring shaft inserted into the mixing chamber 26. 205, and a top stirring blade 206 for stirring the liquid in the mixing chamber 26 is installed on the stirring shaft 205, and a jet channel 207 is provided in the top stirring blade 206. An inner flow channel 201 connecting the jet channel 207 is provided in the stirring shaft 205. A feed pump 12 for feeding deoxidizer into the inner flow channel 201 is installed on the top of the furnace body 1. An air supply pump 13 is installed on the top of the furnace body 1. The air supply pump 13 is used to send external inert gas into the jet channel 207 and then into the mixing chamber 26. Specifically, the feed pump 12 delivers powdered deoxidizer into the inner flow channel 201, and then the air supply pump 13 delivers external inert gas into the inner flow channel 201. This mixes the inert gas and powdered deoxidizer and then enters the jet channel 207. The jet channel 207 then delivers the inert gas mixed with the deoxidizer into the copper liquid located in the mixing chamber 26. In this way, the deoxidizer can be used to react and deoxidize the copper liquid, while the inert gas can also be used to protect the copper liquid. The bottom chamber 29 discharges the copper liquid through the discharge pipe 3. The bottom of the stirring shaft 205 is inserted into the bottom chamber 29, and the bottom of the stirring shaft 205 is equipped with a bottom stirring blade 209 for stirring the liquid in the bottom chamber 29. The bottom stirring blade 209 stirs the copper liquid in the bottom chamber 29, which can effectively remove gaseous impurities in the copper liquid, thereby avoiding product defects caused by the introduction of gas into the copper liquid.

[0027] Please see Figure 1 , Figure 3 and Figure 4 A driven gear 203 is concentrically mounted on the top of the stirring shaft 205, and a main motor 11 is fixedly mounted on the furnace body 1. The output end of the main motor 11 drives a drive wheel 17 that meshes with the driven gear 203. The main motor 11 is used to drive the stirring and gas supply device 2 to rotate. A controller 16 is installed on the outside of the furnace body 1. The main motor 11, the feed pump 12 and the gas supply pump 13 are electrically connected to the controller 16. By driving the stirring shaft 205 to rotate through the main motor 11, the top stirring blades 206 can better disperse the inert gas and deoxidizer into the copper liquid, thereby accelerating the deoxidation speed.

[0028] Please see Figure 1 , Figure 3 and Figure 4 The output end of the feed pump 12 is rotatably sealed to the feed end of the stirring shaft 205, and a guide ring 24 is installed on the stirring shaft 205 through the rotatable seal. The interior of the guide ring 24 is connected to the output end of the air supply pump 13, and an air inlet 202 is provided on the stirring shaft 205 to connect the interior of the guide ring 24 and the inner flow channel 201. An expansion tube 204 is integrally formed in the corresponding slag chamber 25 of the stirring shaft 205, and a spiral blade 30 is rotatably installed in the expansion tube 204. The spiral blade 30 is used to rotate under the push of inert gas to mix the deoxidizer and the inert gas. When the inert gas passes through the spiral blade 30, it will drive the spiral blade 30 to rotate together, so that the spiral blade 30 can use its own centrifugal force to disperse the powdered deoxidizer into the inert gas. This avoids the difficulty of the deoxidizer being evenly dispersed in the copper liquid due to uneven mixing of the deoxidizer, thereby achieving the purpose of accelerating deoxidation.

[0029] When in use, this device can not only efficiently introduce inert gas into the molten copper to isolate oxygen, but also use a deoxidizer to deoxidize the oxygen inside the molten copper. Furthermore, the device, consisting of a slag chamber 25, a mixing chamber 26, and a bottom chamber 29 from top to bottom, can effectively separate molten copper of different compositions, ensuring that unmelted alloy raw materials, slag, and precipitate do not enter the bottom chamber 29. This guarantees that the molten copper in the bottom chamber 29 has undergone deoxidation treatment, ensuring the quality of the molten copper discharged from the discharge pipe 3. It also prevents unmelted copper raw materials from entering the mixing chamber 26 and interfering with the deoxidation process. Moreover, the slag remaining in the slag chamber 25 not only does not interfere with the deoxidation process provided by the stirring and air supply device 2, but also forms an air-isolated isolation layer on the surface of the molten copper, thereby improving the deoxidation efficiency. In addition, the slag concentrated in the slag chamber 25 also facilitates further processing of the slag.

[0030] Example 2: Please refer to Figures 1 to 3Based on Embodiment 1, the top of the scum chamber 25 is connected to an inlet 9 for supplying copper raw materials into the scum chamber 25. A first push rod 7 and a second push rod 6 are fixedly installed at the inlet 9 from top to bottom. A sealing valve plate 8 is installed at the output end of the first push rod 7 to close the inlet 9 and provide a seal. A heat insulation valve plate 5 is installed at the output end of the second push rod 6 to close the inlet 9 and provide heat insulation. The first push rod 7 and the second push rod 6 are electrically connected to the controller 16. The inlet 9 is used to add copper raw materials into the scum chamber 25. It can also be used to add deoxidizers or other complex materials such as carbon powder. When adding material to the scum chamber 25, the sealing valve plate 8 is first opened using the first push rod 7. The operator places the corresponding material between the sealing valve plate 8 and the heat insulation valve plate 5 inside the feed inlet 9. The sealing valve plate 8 is then closed, and the heat insulation valve plate 5 is opened using the second push rod 6 to allow the material to fall to the bottom of the scum chamber 25. The heat insulation valve plate 5 is then closed again. During this process, external air cannot directly communicate freely with the scum chamber 25, thus preventing excessive air from entering the scum chamber 25 and participating in the reaction. Simultaneously, the high-temperature gas inside the scum chamber 25 cannot be excessively discharged from the feed inlet 9, thus avoiding further heat loss. Furthermore, the heat insulation valve plate 5 can be made of ceramic to prevent damage from prolonged contact with the gas inside the scum chamber 25, extending its service life. Since the outer wall of the sealing valve plate 8 does not need to be in prolonged contact with high-temperature gas, it can be sealed with materials such as rubber or plastic, which offer better sealing performance.

[0031] Example 3: Please refer to Figures 1 to 4Based on Embodiment 2, the mixing chamber 26 and the bottom chamber 29 are connected by a conical guide plate 21. A waste slag chamber 28 for collecting precipitated slag is provided below the corresponding conical guide plate 21 in the furnace body 1. An annular exchange port 20 connecting the mixing chamber 26 and the waste slag chamber 28 is provided on the conical guide plate 21, and an array of inclined isolation blades 27 for guiding the precipitated slag into the waste slag chamber 28 is arranged on the annular exchange port 20. A scraper 208 is provided on the inner wall of the bottom partition 19 and the conical guide plate 21 of the stirring shaft 205. The scraper 208 is used to send the precipitated slag in the mixing chamber 26 into the waste slag chamber 28 through the annular exchange port 20. The precipitated slag is discharged from the waste slag chamber 28 through the slag discharge pipe 4. A slag removal pipe 15 connecting to the slag chamber 25 is fixedly installed on the top of the furnace body 1, and the top of the slag removal pipe 15 is sealed by a top cap 14. When the stirring shaft 205 rotates, the scraper 208 scrapes the upper end of the bottom baffle 19 and the outer wall of the conical guide plate 21, thereby scraping away the precipitated slag. Then, under the action of centrifugal force, the precipitated slag will be gradually pushed into the annular exchange port 20. Since the density of the precipitated slag is greater than that of the copper liquid, the precipitated slag entering the annular exchange port 20 will replace the copper liquid originally located in the waste slag chamber 28, thus gradually accumulating in the waste slag chamber 28 and waiting to be discharged by the slag discharge pipe 4. When the precipitated slag approaches the annular... When the molten copper is exchanged at the 20th port, it will be guided downward by the inclined isolation blades 27, and the process will be accelerated by the scraper 208. Therefore, the precipitated slag will be difficult to pass through the annular exchange port 20 from the waste slag chamber 28 into the mixing chamber 26, ensuring that the precipitated slag can be correctly separated. In this way, the precipitated slag can be continuously discharged without stopping the machine, thus ensuring the continuous operation capability of the casting furnace. Similarly, the operator can also remove the excess slag in the slag chamber 25 through the slag removal pipe 15.

[0032] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A continuous casting furnace for copper material molten material, comprising a furnace body (1), characterized in that: The inner cavity of the furnace body (1) is divided into a slag chamber (25), a mixing chamber (26), and a bottom chamber (29) from top to bottom by a top partition (22) and a bottom partition (19). The top partition (22) is provided with a top through hole (23) that connects the slag chamber (25) and the mixing chamber (26) and is used to isolate the copper material in the slag chamber (25). The bottom partition (19) is provided with a bottom through hole (18) that connects the mixing chamber (26) and the bottom chamber (29) and is used to isolate the slag and sediment in the mixing chamber (26). The furnace body (1) is equipped with a vacuum pump (10) for extracting gas from the slag chamber (25). The top of the furnace body (1) is equipped with a stirring and gas supply device (2). 2) Includes a stirring shaft (205) inserted into the mixing chamber (26), and a top stirring blade (206) for stirring the liquid in the mixing chamber (26) is installed on the stirring shaft (205), and a jet channel (207) is provided in the top stirring blade (206). An inner flow channel (201) connecting the jet channel (207) is provided in the stirring shaft (205). A feed pump (12) for feeding deoxidizer into the inner flow channel (201) is installed on the top of the furnace body (1). An air supply pump (13) is installed on the top of the furnace body (1), and the air supply pump (13) is used to send external inert gas into the jet channel (207) and then into the mixing chamber (26). The bottom chamber (29) discharges copper liquid through the discharge pipe (3).

2. The continuous casting furnace for copper material molten material according to claim 1, characterized in that: The bottom of the stirring shaft (205) is inserted into the bottom cavity (29), and the bottom of the stirring shaft (205) is equipped with a bottom stirring blade (209) for stirring the liquid in the bottom cavity (29).

3. The continuous casting furnace for copper material molten material according to claim 1, characterized in that: A driven gear (203) is concentrically mounted on the top of the stirring shaft (205), and a main motor (11) is fixedly mounted on the furnace body (1). The output end of the main motor (11) drives a drive wheel (17) that meshes with the driven gear (203). The main motor (11) is used to drive the stirring and air supply device (2) to rotate. A controller (16) is installed on the outside of the furnace body (1). The main motor (11), the feed pump (12), and the air supply pump (13) are electrically connected to the controller (16).

4. The continuous casting furnace for copper material molten material according to claim 3, characterized in that: The top of the scum chamber (25) is connected to an inlet (9) for supplying copper raw materials into the scum chamber (25). The inlet (9) is fixedly installed with a first push rod (7) and a second push rod (6) from top to bottom. The output end of the first push rod (7) is equipped with a sealing valve plate (8) for sealing the inlet (9) and for sealing. The output end of the second push rod (6) is equipped with a heat insulation valve plate (5) for sealing the inlet (9) and for heat insulation. The first push rod (7) and the second push rod (6) are electrically connected to the controller (16).

5. A continuous casting furnace for copper material molten material according to claim 1, characterized in that: The output end of the feed pump (12) is rotatably sealed to the feed end of the stirring shaft (205), and a guide ring (24) is installed on the stirring shaft (205) through the rotatable seal. The interior of the guide ring (24) is connected to the output end of the air supply pump (13), and an air inlet (202) is provided on the stirring shaft (205) for connecting the interior of the guide ring (24) and the inner flow channel (201).

6. The continuous casting furnace for copper material molten material according to claim 1, characterized in that: The stirring shaft (205) has an expansion tube (204) integrally formed in the corresponding scum chamber (25), and a spiral blade (30) is rotatably installed in the expansion tube (204). The spiral blade (30) is used to rotate under the push of inert gas to mix the deoxidizer and inert gas.

7. The continuous casting furnace for copper material molten material according to claim 1, characterized in that: The top of the furnace body (1) is fixedly installed with a slag-collecting pipe (15) that communicates with the slag chamber (25), and the top of the slag-collecting pipe (15) is sealed by a top cover (14).

8. A continuous casting furnace for copper material molten material according to claim 1, characterized in that: The mixing chamber (26) and the bottom chamber (29) are connected by a conical guide plate (21), and the furnace body (1) is provided with a waste slag chamber (28) for collecting precipitated slag below the corresponding conical guide plate (21). The conical guide plate (21) is provided with an annular exchange port (20) connecting the mixing chamber (26) and the waste slag chamber (28), and the annular exchange port (20) is provided with an array of inclined isolation blades (27) for guiding the precipitated slag into the waste slag chamber (28). The stirring shaft (205) is provided with a scraper (208) on the inner wall of the corresponding bottom partition (19) and the conical guide plate (21), and the scraper (208) is used to send the precipitated slag in the mixing chamber (26) into the waste slag chamber (28) through the annular exchange port (20). The waste slag chamber (28) discharges the precipitated slag through the slag discharge pipe (4).

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