Feeding device of magnesium ingot casting reduction furnace
By designing the feeding device of the magnesium ingot casting reduction furnace, using structures such as sliding cover, pressing cover and sealing ring, the problem of adding powder in vacuum or inert gas protection is solved, and the production of high-purity magnesium ingots and alloys is realized, and the formation of oxides and harmful impurities is avoided.
Patent Information
- Application Number
- CN202311255161.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-27
- Publication Date
- 2025-03-28
AI Technical Summary
During the magnesium ingot smelting and magnesium alloy casting, how to effectively add powder under vacuum or inert gas protection to prevent foreign air from entering the furnace body and interfering with the smelting process.
A feeding device for casting reduction furnaces of magnesium ingot casting is designed, including components such as inflatable and heat-insulated cutting tanks, powder feed tanks, storage boxes and power boxes. Through the fit of the sliding cover, press cover and sealing ring, ensure that the material does not come into contact with the outside air during the addition process. The mechanical structure of the cutting dragon and the cutting comb is used to achieve uniform transportation and preheating of materials.
It is achieved to safely and effectively add powder to the smelting reduction furnace under vacuum or inert gas protection state, prevent oxygen from entering, improve the purity of magnesium ingots and alloys, and avoid the formation of oxides and harmful impurities.
Smart Images
Figure CN119713846A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a powder feeding device, in particular to a feeding device for a magnesium ingot casting reduction furnace. Background Art
[0002] The production of magnesium ingots requires smelting, during which auxiliary agents such as calcium fluoride and aluminum fluoride need to be added to adjust the composition of the magnesium ingots.
[0003] When magnesium ingots are used for secondary casting of magnesium alloys, it is often necessary to add alloy element powder under the protection of hydrogen or nitrogen gas, so that impurities react to form volatile compounds and are discharged out of the furnace.
[0004] During the smelting, refining and casting of magnesium ingots, powdered reducing agents, auxiliary agents or other metal elements need to be added to the smelting furnace or refining furnace. However, the smelting or refining reaction environment generally needs to be carried out in a vacuum state or under inert gas protection. Therefore, how to add powder during the reaction while ensuring that external air does not enter the furnace and interfere with the smelting process. Summary of the invention
[0005] In order to solve the problems existing in the prior art, the present invention provides a charging device for a magnesium ingot casting reduction furnace.
[0006] The device includes: an air-filled insulated discharge tank connected to the smelting reduction furnace through a pipeline, a powder feeding tank installed above the air-filled insulated discharge tank, and a storage box located above the powder feeding tank; wherein a material distribution cover is provided between the powder feeding tank and the storage box, the center of the storage box is a through-hole structure, the part of the material distribution cover located below the through-hole structure is a sliding cover that can be pulled horizontally, and a pressure cover is installed inside the storage box that slides along the through-hole structure, and the area of the through-hole structure is smaller than the area of the sliding cover, ensuring that after the sliding cover is removed, all materials in the storage box can fall into the powder feeding tank.
[0007] Furthermore, the press cover is in a stepped shape with a larger top and a smaller bottom. The outer diameter of the lower part of the press cover is slightly smaller than the inner diameter of the through-hole structure, and the height of the lower part of the press cover is greater than or equal to the height of the through-hole structure, ensuring that the material adhered to the inner wall of the storage box all falls into the powder feeding tank under the action of the press cover.
[0008] Furthermore, a sealing ring is installed on the outer diameter of the lower part of the pressing cover, and a No. 2 exhaust valve is installed at the bottom of the pressing cover to ensure that the excess gas in the storage box is discharged when the pressing cover moves downward.
[0009] Furthermore, a power box supported by a plurality of columns is provided in the middle of the powder feeding tank, and a No. 1 motor and a No. 2 motor installed in reverse are provided inside the power box.
[0010] Furthermore, the output end of the No. 1 motor faces downward, and a feeding auger is installed at the output end of the No. 1 motor. The feeding auger is used to feed the material at the bottom of the powder feeding tank into the air-filled and heat-insulated feeding tank.
[0011] Furthermore, the output end of motor No. 2 faces upward, and a feeding comb is installed on the output end of motor No. 2, wherein the feeding comb includes: a comb handle symmetrical to the rotation center of the output end of motor No. 2, comb teeth connected to the bottom of the comb handle and arranged in a staggered manner, and comb bristles connected to the bottom of all the comb teeth and the outside of the outermost comb teeth, which are used to brush all materials in the powder feeding tank to the feeding auger at the bottom.
[0012] Furthermore, an umbrella cap is provided at the output end of the second motor to prevent materials from the storage box from piling up on the top of the power box.
[0013] Furthermore, the gas-insulated discharge tank includes: an upper plate valve located at the connection between the powder feeding tank and the gas-insulated discharge tank, a lower plate valve located at the connection between the gas-insulated discharge tank and the smelting reduction furnace, and an air injection hole located in the middle of the gas-insulated discharge tank.
[0014] Furthermore, a No. 1 exhaust valve is provided on the material distribution cover, which is used to discharge excess air from the No. 1 exhaust valve when the protective gas is injected through the gas injection hole.
[0015] Furthermore, an oxygen detector is installed on the side wall of the upper layer of the powder feeding tank to detect the oxygen content value in the powder feeding tank.
[0016] The technical effects of the present invention are: first, when adding materials into the smelting reduction furnace, it is necessary to pass through the storage box, the powder feeding tank, and the air-insulated discharge tank in sequence. The center of the storage box is a through-hole structure. The sliding cover on the material distribution cover controls the connection or closure between the storage box and the powder feeding tank. After opening the sliding cover, the material falls into the powder feeding tank under the structure of the pressure cover itself and the sealing effect of the sealing ring. At the same time, it is ensured that the outside air will not enter the powder feeding tank with the material.
[0017] Secondly, the second exhaust valve on the pressing cover ensures that when the material is fed into the storage box, the excess air above the material can be discharged and the material can be pressed flat on the sliding cover.
[0018] Third, the No. 2 motor drives the unloading comb to rotate continuously. The staggered arrangement of the comb teeth on the unloading comb ensures that the combing hair below can brush all positions on the side wall and bottom of the powder feeding tank, and brush all materials entering the powder feeding tank to the bottom area of the tank body. The No. 1 motor drives the unloading auger to gradually transport the materials in the bottom area to the inflatable and heat-insulated unloading tank. At the same time, the umbrella cap structure prevents the material from falling on the top of the fixed power box. When the No. 2 motor unloading comb drives the rotation, the material on the umbrella cap structure is thrown to the inner wall of the powder feeding tank under the action of centrifugal force, and then falls into the tank body. Ensure that all materials from the storage box can be fed into the smelting reduction furnace to achieve quantifiable material addition.
[0019] Fourth, before the material enters the powder feeding tank, the air injection hole on the air-inflated insulation feed tank is used to blow protective gas, such as nitrogen, argon, etc., into the powder feeding tank when the upper plate valve is open and the lower plate valve is closed, forcing the excess air in the powder feeding tank to be discharged from the No. 1 exhaust valve. At the same time, an oxygen detector is installed on the side wall of the upper layer of the powder feeding tank to determine the oxygen content in the powder feeding tank to confirm whether the air in the powder feeding tank has been discharged, ensuring that when adding materials to the smelting reduction furnace, oxygen cannot enter the smelting reduction furnace along with the materials to interfere with the smelting reaction, thereby improving the purity of magnesium ingots and alloy magnesium ingots and preventing the formation of oxides and harmful impurities.
[0020] Fifth, before the materials enter the smelting reduction furnace, they are all temporarily stored in the gas-filled insulated discharge tank for preheating, the upper plate valve is closed, the lower plate valve is opened, and at the same time, the protective gas is continuously injected through the gas injection hole to blow all the materials into the smelting reduction furnace to improve the uniformity of material addition.
[0021] Sixth, the feeding device is suitable for adding powdered materials, including but not limited to auxiliary agents, reducing agents, alloy element powders, etc., and the gas injection holes can also be used to inject impurity removal gases such as hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a front view of the feeding device in the present invention; Figure 2 It is a three-dimensional diagram of the internal structure of the feeding device in the present invention; Figure 3 It is a stereogram of the feeding device in the present invention.
[0023] In the figure, 1. powder feeding tank, 2. storage box, 3. inflatable heat-insulating feeding tank, 4. material distribution cover, 5. sliding cover, 6. pressure cover, 8. oxygen detector, 10. smelting reduction furnace, 11. power box, 12. No. 1 motor, 13. No. 2 motor, 14. feeding auger, 15. feeding comb, 16. umbrella cap, 21. through-hole structure, 8., 31. air injection hole, 32. upper plate valve, 33. lower plate valve, 41. No. 1 exhaust valve, 61. No. 2 exhaust valve, 62. sealing ring, 111. column, 151. comb handle, 152. comb teeth, 153. comb hair, DETAILED DESCRIPTION
[0024] Combine the following Figures 1 to 3 Embodiments of the present invention will be described in detail.
[0025] Figure 1 The entire internal structure of the charging device is illustrated, and the charging device includes: an air-insulated discharge tank 3 connected to the smelting reduction furnace 10 through a pipeline, a powder feeding tank 1 installed above the air-insulated discharge tank 3, and a storage box 2 located above the powder feeding tank 1; wherein, a dividing cover 4 is provided between the powder feeding tank 1 and the storage box 2, and the center of the storage box 2 is a through-hole structure 21.
[0026] The pressing cover 6 is in a stepped shape with a larger upper portion and a smaller lower portion. The outer diameter of the lower portion of the pressing cover 6 is slightly smaller than the inner diameter of the through-hole structure 21, and the height of the lower portion of the pressing cover 6 is greater than or equal to the height of the through-hole structure 21, ensuring that the materials adhering to the inner wall of the storage box 2 all fall into the powder feeding tank 1 under the action of the pressing cover 6; a sealing ring 62 is installed on the outer diameter of the lower portion of the pressing cover 6, and a No. 2 exhaust valve 61 is installed at the bottom of the pressing cover 6 to ensure that when the pressing cover 6 moves downward, the excess gas in the storage box 2 is discharged.
[0027] A power box 11 supported by a plurality of columns 111 is provided in the middle of the powder feeding tank 1, and a No. 1 motor 12 and a No. 2 motor 13 installed in reverse are provided inside the power box 11; the output end of the No. 1 motor 12 faces downward, and a discharge auger 14 is installed at the output end of the No. 1 motor 12, and the discharge auger 14 is used to feed the material at the bottom of the powder feeding tank 1 into the air-filled and heat-insulated discharge tank 3.
[0028] The output end of the second motor 13 faces upward, and a material discharge comb 15 is installed at the output end of the second motor 13 ; an umbrella cap 16 is also provided at the output end of the second motor 13 to prevent the material from the material storage box 2 from piling up on the top of the power box 11 .
[0029] The gas-insulated discharge tank 3 includes: an upper plate valve 32 located at the connection between the powder feeding tank 1 and the gas-insulated discharge tank 3, a lower plate valve 33 located at the connection between the gas-insulated discharge tank 3 and the smelting reduction furnace 10, and an air injection hole 31 located in the middle of the gas-insulated discharge tank 3; a No. 1 exhaust valve 41 is provided on the material distribution cover 4, which is used to discharge excess air from the No. 1 exhaust valve 41 when the protective gas is injected through the air injection hole 31.
[0030] An oxygen detector 8 is installed on the side wall of the upper layer of the powder feeding tank 1 to detect the oxygen content value in the powder feeding tank 1. An oxygen detector 8 is installed on the side wall of the upper layer of the powder feeding tank 1 to detect the oxygen content value in the powder feeding tank 1.
[0031] Figure 2 and Figure 3 The diagram shows the structure of the sliding cover on the feeding device and the pulling direction, as well as the three-dimensional structure of the feeding comb. The portion of the material distribution cover 4 located below the through-hole structure 21 is a sliding cover 5 that can be pulled horizontally. The material storage box 2 is equipped with a pressing cover 6 that slides along the through-hole structure 21. The area of the through-hole structure 21 is smaller than that of the sliding cover 5, ensuring that after the sliding cover 5 is removed, all materials in the material storage box 2 can fall into the powder feeding tank 1.
[0032] The unloading comb 15 includes: a comb handle 151 symmetrical with the rotation center of the output end of the second motor 13, comb teeth 152 connected to the bottom of the comb handle 151 and arranged in a staggered manner, and comb bristles 153 connected to the bottom of all the comb teeth 152 and the outside of the outermost comb teeth 152, which are used to brush all the materials in the powder feeding tank 1 to the unloading auger 14 at the bottom.
[0033] Working principle: The specific working steps of the device are as follows: the first step is to take out the pressure cover 6 when the slide cover 5 is not pulled out, put the material to be added into the storage box 2, install the pressure cover 6, open the second exhaust valve 61, press the pressure cover 6 down, compact the material at the bottom of the storage box 2, and exhaust the air above the material. The second step is to keep the lower plate valve 33 closed, open the upper plate valve 32, inject protective gas such as nitrogen or argon through the gas injection hole 31, open the No. 1 exhaust valve 41, let the air in the powder feeding tank 1 be discharged from the No. 1 exhaust valve, and use the argon gas detector 8 to detect the oxygen content in the powder feeding tank 1. When the oxygen content is less than %, the protective gas injection can be stopped and the upper plate valve is closed. The third step is to pull the slide cover 5 outward to allow the material in the storage box 2 to fall into the powder feeding tank 1 under the dual action of gravity and the pressure cover 6, and then retract the slide cover 5 to its original position. In the fourth step, the No. 1 motor 12 and the No. 2 motor 13 in the power box 11 are started, the upper plate valve 32 is opened, the combing hair 153 on the material discharge comb 15 brushes the material on the inner wall of the powder feeding tank 1 to the bottom area of the tank body, and the material discharge auger 14 delivers the material from the powder feeding tank 1 to the gas-filled heat-insulated discharge tank 3. In the fifth step, the upper plate valve 32 is closed, the lower plate valve 33 is opened, and the gas injection hole 31 can be opened at the same time to blow all the powder in the gas-filled heat-insulated discharge tank 3 into the smelting reduction furnace 10.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A charging device for a magnesium ingot casting reduction furnace, characterized in that: The feeding device comprises: an air-filled heat-insulated feed tank (3) connected to the smelting reduction furnace (10) via a pipeline, a powder feed tank (1) installed above the air-filled heat-insulated feed tank (3), and a storage box (2) located above the powder feed tank (1); A material distribution cover (4) is provided between the powder material feeding tank (1) and the material storage box (2); the center of the material storage box (2) is a through hole structure (21); the portion of the material distribution cover (4) located below the through hole structure (21) is a sliding cover (5) that can be pulled horizontally; a material pressing cover (6) is installed inside the material storage box (2) and slides along the through hole structure (21); the area of the through hole structure (21) is smaller than the area of the sliding cover (5), so that after the sliding cover (5) is removed, all the materials in the material storage box (2) can fall into the powder material feeding tank (1).
2. The magnesium ingot casting reduction furnace charging device according to claim 1, characterized in that: The pressing cover (6) is in a stepped shape with a larger upper portion and a smaller lower portion. The outer diameter of the lower portion of the pressing cover (6) is slightly smaller than the inner diameter of the through-hole structure (21). The height of the lower portion of the pressing cover (6) is greater than or equal to the height of the through-hole structure (21), thereby ensuring that the material adhered to the inner wall of the material storage box (2) all falls into the powder feeding tank (1) under the action of the pressing cover (6).
3. The magnesium ingot casting reduction furnace charging device according to claim 2, characterized in that: A sealing ring (62) is mounted on the outer diameter of the lower portion of the pressing cover (6), and a second exhaust valve (61) is mounted at the bottom of the pressing cover (6) to ensure that when the pressing cover (6) moves downward, excess gas in the storage box (2) is exhausted.
4. The magnesium ingot casting reduction furnace charging device according to claim 1, characterized in that: A power box (11) supported by a plurality of columns (111) is provided in the middle of the powder feeding tank (1), and a first motor (12) and a second motor (13) installed in opposite directions are provided inside the power box (11).
5. The magnesium ingot casting reduction furnace charging device according to claim 4, characterized in that: The output end of the first motor (12) faces downwards, and a feeding auger (14) is mounted on the output end of the first motor (12). The feeding auger (14) is used to feed the material at the bottom of the powder feeding tank (1) into the air-filled heat-insulating feeding tank (3).
6. The magnesium ingot casting reduction furnace charging device according to claim 5, characterized in that: The output end of the second motor (13) faces upward, and a material discharge comb (15) is installed at the output end of the second motor (13); The material discharge comb (15) comprises: a comb handle (151) symmetrical with the rotation center of the output end of the second motor (13), comb teeth (152) connected to the bottom of the comb handle (151) and arranged in a staggered manner, and comb bristles (153) connected to the bottom of all the comb teeth (152) and the outside of the outermost comb teeth (152), and is used to brush all the materials in the powder feeding tank (1) to the material discharge auger (14) at the bottom.
7. The magnesium ingot casting reduction furnace charging device according to claim 6, characterized in that: The output end of the second motor (13) is also provided with an umbrella cap (16) for preventing materials from the material storage box (2) from accumulating on the top of the power box (11).
8. The magnesium ingot casting reduction furnace charging device according to claim 1, characterized in that: The gas-insulated discharge tank (3) comprises: an upper plate valve (32) located at the connection between the powder feeding tank (1) and the gas-insulated discharge tank (3), a lower plate valve (33) located at the connection between the gas-insulated discharge tank (3) and the smelting reduction furnace (10), and an air injection hole (31) located in the middle of the gas-insulated discharge tank (3).
9. The magnesium ingot casting reduction furnace charging device according to claim 2, characterized in that: The material distribution cover (4) is provided with a first exhaust valve (41) for exhausting excess air from the first exhaust valve (41) when protective gas is injected through the gas injection hole (31).
10. The magnesium ingot casting reduction furnace charging device according to claim 9, characterized in that: An oxygen detector (8) is installed on the side wall of the upper layer of the powder feeding tank (1) for detecting the oxygen content value in the powder feeding tank (1).