A charging device, a smelting system and an alloying smelting method

Abstract

The invention relates to the technical field of smelting and feeding, and discloses a feeding device, a smelting system and an alloying smelting method, wherein the feeding device comprises a regular n-gon frame, a rotating shaft passing through the center of the regular n-gon frame, a triangular area is formed between the frame and the center of the regular n-gon frame, and a material holding bottom plate for holding materials is laid in each of the other triangular areas except one of the triangular areas, and the material holding bottom plate and the frame corresponding to the triangular area where the material holding bottom plate is located are rotatably connected or flipped; a rotating support plate for supporting the material holding bottom plate is fixedly connected at one end of the rotating shaft, and a fan-shaped notch is provided on the rotating support plate. In the initial position, the fan-shaped notch is opposite to the triangular area where the material holding bottom plate is not arranged. When the rotating support plate rotates to the point where the fan-shaped notch is opposite to the triangular area where the material holding bottom plate is located, the material holding bottom plate loses the support of the rotating support plate and rotates or flips by itself under the action of gravity.

Description

Technical Field

[0001] The present invention relates to the technical field of smelting and feeding, and more specifically to a feeding device, a smelting system and an alloying smelting method. Background Art

[0002] Electronic waste, commonly known as e-waste, includes all kinds of obsolete computers, communication equipment and household appliances, as well as obsolete precision electronic instruments and meters. my country generates a large amount of electronic waste, with an estimated annual waste of 5 million tons of electronic products, and the amount is growing rapidly, estimated to be 3% to 5% per year.

[0003] Electronic waste is mainly composed of plastics (about 30%), inert oxides (about 30%) and metals (about 40%), of which the metal part contains more than 20 kinds of metals such as copper, tin, iron, nickel, aluminum, zinc, gold, silver, platinum, palladium, manganese, molybdenum, bismuth, antimony, chromium, cadmium and gallium. Therefore, from another perspective, electronic waste is often called "urban mines". If the metals in electronic waste are recycled as alloys, the smelting process of refining elemental metals one by one will be eliminated, and the short-process recycling and treatment of electronic waste can be realized, which greatly shortens the process flow, saves energy and reduces emissions, and avoids the generation of pollutants such as electrolyte and acid leaching solution. Moreover, most of the metal elements in electronic waste can be recycled, realizing efficient and comprehensive utilization of resources.

[0004] There are many non-metallic materials in electronic waste, and some non-metallic parts need to be disassembled and removed before smelting. Even after disassembly, there are still many non-metallic materials left, so the alloy obtained by the smelting process of simply adding electronic waste cannot be used directly. If you want to obtain an alloy that meets the requirements, you need to add a covering agent during the smelting process and pass a protective gas to prevent the high-temperature metal liquid from oxidizing. In addition, you need to add a variety of other metal auxiliary materials to enhance the performance of the alloy. The shapes and sizes of disassembled electronic waste are different. With the addition of other metal auxiliary materials, the types and physical properties of the added materials are too complicated. In order to achieve a good alloying effect, these added materials need to be added to the smelting furnace in batches. The feeding bin for adding materials to the smelting furnace in the prior art is basically designed for raw materials such as ores, and cannot meet the needs of adding a variety of materials such as electronic waste. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides a feeding device, a smelting system and an alloying smelting method.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions.

[0007] A feeding device comprises a regular n-gon frame, a rotating shaft perpendicular to the regular n-gon frame and passing through the center of the regular n-gon frame, wherein n is greater than or equal to 3, a triangular area is formed between each frame of the regular n-gon frame and the center of the regular n-gon frame, and a material holding bottom plate for holding materials is laid in each of the remaining triangular areas except one of the triangular areas, and the material holding bottom plate and the frame corresponding to the triangular area where the material holding bottom plate is located are rotatably connected or flipped; a rotating support plate for supporting all the material holding bottom plates is fixedly connected at one end of the rotating shaft, and a fan-shaped notch with the axis of the rotating shaft as the center is provided on the rotating support plate, and the angle of the fan-shaped notch is α, and α is greater than 360 / n degrees; in the initial position, the fan-shaped notch is opposite to the triangular area where no material holding bottom plate is arranged, and when the rotating support plate rotates to the point where the fan-shaped notch is opposite to the triangular area where any material holding bottom plate is located, the material holding bottom plate loses the support of the rotating support plate and rotates or flips by itself under the action of gravity.

[0008] The feeding device in this scheme can be suspended directly above the smelting furnace by a gantry or a portal crane, and the regular n-gon frame and the rotating shaft can be suspended separately and independently, ensuring that the regular n-gon frame is fixed and the rotating shaft can rotate. In the initial position, the regular n-gon frame and the rotating support plate are both kept horizontal, and the rotating support plate and the regular n-gon frame can be flush. The rotation connection or flip connection between the material holding bottom plate and the frame can be a rotation connection with the frame as the axis, or the material holding bottom plate and the frame can be a rotation connection or flip connection through hinges or flip hinges. When this scheme is used, the materials to be added are piled on the material holding bottom plate, and the rotating shaft and the rotating support plate are intermittently rotated by manual or driving source transmission, so that the fan-shaped notch intermittently faces the triangular area where the material holding bottom plate is located in turn. When the fan-shaped notch faces the triangular area, the material holding bottom plate in the triangular area loses the support of the rotating support plate and rotates or flips around the frame under the action of its own gravity and the gravity of the material, so that the material on the material holding bottom plate falls into the smelting furnace. After all the material-carrying bottom plates have been rotated or turned over, they are manually restored to their initial positions, i.e., horizontal material-carrying positions, and then materials can be placed again. Of course, the rotating support plate is also restored to its initial position to support all the material-carrying bottom plates again. The interval time can be the same or different.

[0009] As a further improved feeding device, the above-mentioned material holding bottom plate is a triangular bottom plate adapted to the triangular area, and the sharp corner end of the triangular bottom plate close to the rotating shaft is provided with a missing corner for avoiding the rotating shaft, and the bottom side of the triangular bottom plate away from the rotating shaft is rotatably connected or flipped connected with the frame of the regular n-gon frame. The adaptation in this scheme means that the bottom side of the triangular bottom plate is parallel to the frame corresponding to the triangular area where the triangular bottom plate is located, and the sharp angle on the triangular bottom plate opposite to the bottom side points to the center of the regular n-gon frame or the sharp point of the sharp angle coincides with the center of the regular n-gon frame.

[0010] As a further improved feeding device, the above-mentioned rotating support plate is a circular plate, and the rotating support plate and the rotating shaft are coaxial, and the radius of the rotating support plate is 1 / 3 to 1 / 2 of the radius of the regular n-gon frame.

[0011] As an improved feeding device, the two side edges of the triangular base plate except the bottom edge are respectively fixedly connected with side baffles, each triangular base plate and the two side baffles thereon form an independent grid for accommodating materials, and the two side baffles on each triangular base plate are provided with discharge ports at the notched ends of the triangular base plate.

[0012] As a further improved feeding device, each frame of the regular n-gon frame is fixedly connected to a bottom side panel, and in the initial position, an open material receiving cavity is formed between each independent grid slot and the corresponding bottom side panel.

[0013] As another improved feeding device, n side baffles are fixedly connected to the regular n-gon frame, each side baffle is perpendicular to the regular n-gon frame, and each side baffle is arranged along the radial direction of the regular n-gon frame and passes through the vertices of the regular n-gon frame respectively; in the initial position, an open material holding cavity is formed between two adjacent side baffles, the material holding bottom plate located between the two adjacent side baffles, and the rotating shaft. In the initial position, the material holding bottom plate can be flush with the lower edge of the side baffle, or the material holding bottom plate can also be against the lower edge of the side baffle. This solution does not set a baffle on the material holding bottom plate, but sets a side baffle on the regular n-gon frame, which can also play the role of blocking materials.

[0014] The present invention introduces a smelting system, comprising the above-mentioned feeding device, and also comprising a blowing pipe and a smelting furnace with an upper opening, wherein the feeding device is suspended above the opening of the smelting furnace, the outlet end of the blowing pipe extends into the smelting furnace, and the inlet end of the blowing pipe is connected to an external gas source. The feeding device in the smelting system can also be various improved feeding devices mentioned above.

[0015] The present invention also introduces an alloying smelting method, which utilizes the above-mentioned smelting system to place materials on a material containing bottom plate in sequence. In the initial position, the fan-shaped notch is opposite to the triangular area where the material containing bottom plate is not arranged. The fan-shaped notch is made opposite to the triangular area where the material containing bottom plate is located in sequence by intermittently rotating the rotating shaft 360 / n degrees. When the fan-shaped notch is opposite to the triangular area, the material containing bottom plate in the triangular area rotates or flips automatically to make the material on the triangular bottom plate fall into the smelting furnace. During the smelting process, smelting protective gas or smelting reducing gas is blown into the molten metal in the smelting furnace through the blowing pipe.

[0016] As a further improved feeding device, the above-mentioned rotating shaft is a cylindrical shaft, a paddle core shaft is coaxially penetrated inside the cylindrical shaft, two ends of the paddle core shaft are respectively exposed at two ends of the cylindrical shaft, the paddle core shaft passes through a rotating support plate, and the part of the paddle core shaft exposed from the rotating support plate is fixedly connected with a paddle blade.

[0017] As a further improved feeding device, the above-mentioned barrel shaft is connected with a rotating handle, and the above-mentioned paddle core shaft is connected with a core shaft rotating handle.

[0018] As a further improved feeding device, the above-mentioned barrel shaft is transmission connected to the first motor, and the above-mentioned paddle core shaft is transmission connected to the second motor.

[0019] The present invention also introduces another smelting system, including the above-mentioned feeding device with a paddle mandrel, and also including a blowing pipe and a smelting furnace with an upper opening, the feeding device is suspended above the opening of the smelting furnace, the paddle extends into the smelting furnace, the outlet end of the blowing pipe extends into the smelting furnace, and the inlet end of the blowing pipe is connected to an external gas source. The feeding device in the smelting system can also be the above-mentioned feeding device with an additional rotary handle or motor.

[0020] The present invention also introduces another alloying smelting method, which utilizes the above-mentioned smelting system to place materials on a material holding bottom plate in sequence. In the initial position, the fan-shaped notch is opposite to the triangular area where the material holding bottom plate is not arranged, and the paddle is opposite to one of the sides of the fan-shaped notch. The cylinder shaft is intermittently rotated 360 / n degrees to make the fan-shaped notch opposite to the triangular area where the material holding bottom plate is located in sequence. When the fan-shaped notch is opposite to the triangular area, the material holding bottom plate in the triangular area rotates or flips automatically when the cylinder shaft is intermittently rotated or before the cylinder shaft is intermittently rotated, the paddle core shaft is rotated to make the paddle swing to push away the covering layer floating above the molten metal under the triangular area where the material holding bottom plate to be flipped is located. After each swing of the paddle, the paddle is restored to the position where the paddle and the side of the fan-shaped notch are opposite. During the smelting process, smelting protective gas or smelting reducing gas is blown into the molten metal in the smelting furnace through the blowing pipe.

[0021] Compared with the prior art, the present invention has the following beneficial effects: first, materials of different components are stacked on the material bottom plate in sequence according to the components of the materials to be added, and then the materials can be dropped intermittently in sequence, so as to control the order and interval time of material addition, that is, to adjust the alloying reaction time between materials of different components and the main alloy in the molten metal, so that the added materials and the main alloy are effectively alloyed. For example, if the melting point of the material to be added is higher than or close to the melting point of the main alloy, or the solubility of the alloying elements in the material in the main alloy is low and it is not easy to form an alloy with the main alloy, such materials can be added in the early stage of smelting, and such materials can be stacked on the material bottom plate with a forward rotation or flipping order. For another example, if the melting point of the material to be added is lower than the melting point of the main alloy and it is easy to volatilize after melting, or the alloying elements in the material have a strong affinity with oxygen and are easy to oxidize, such materials can be added in the middle and late stages of smelting, and such materials can be stacked on the material bottom plate with a backward rotation or flipping order. Secondly, during the smelting process, the covering layer floating above the molten metal mainly includes covering agents and non-metallic impurities. Since the materials to be added are in different forms, such as blocks, filaments, flakes, powders, etc., when adding materials, the paddles can be used to push away the covering layer. On the one hand, this can prevent powdered materials or materials with lower density from floating on the covering layer or being mixed in the covering layer, ensuring that all materials can enter the molten metal and achieve accurate addition of material components; on the other hand, it can prevent materials with larger mass and / or volume from bringing impurities into the molten metal when passing through the covering layer during the blanking process, thus better ensuring the purity of the molten metal. In addition, the paddles can stir the molten metal when they swing, which can speed up the alloying reaction speed and homogenization of the added components and the main alloy, and is an effective means to achieve multi-component alloying. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention after the first material holding bottom plate completes material dropping in the counterclockwise direction.

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the fourth embodiment of the present invention.

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the fifth embodiment of the present invention.

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the partially cut-away embodiment of the present invention.

[0027] Figure 6 Schematic diagram of the alignment relationship between the blade and the fan-shaped notch of the rotating support plate in the seventh embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings, which are only used for exemplary description and cannot be understood as limiting the present invention.

[0029] In order to more concisely describe the present embodiment, some parts known to those skilled in the art but not related to the main content of the present invention are omitted in the drawings or descriptions. In addition, for the convenience of description, some parts in the drawings are omitted, enlarged or reduced, but they do not represent the size or entire structure of the actual product.

[0030] Embodiment 1:

[0031] like Figure 1 As shown, a feeding device 1 includes a regular octagonal frame 11 surrounded by round steel and a cylindrical rotating shaft 12, the axis of which is perpendicular to the regular octagonal frame 11 and passes through the center of the regular octagonal frame 11. A triangular area is formed between each frame of the regular octagonal frame 11 and the center of the regular octagonal frame 11, and a material holding bottom plate 13 for holding materials is laid in each of the remaining triangular areas except for one of the triangular areas. A sleeve 131 is fixedly connected to the material holding bottom plate 13, and the sleeve 131 is sleeved on the outside of the frame of the regular octagonal frame 11, so as to realize the rotational connection between the material holding bottom plate 13 and the frame corresponding to the triangular area where the material holding bottom plate 13 is located. In other embodiments, the material holding bottom plate 13 and the frame can also be rotationally connected or flipped by hinges or flip hinges.

[0032] The lower end of the rotating shaft 12 is fixedly connected with a rotating support plate 14 for supporting the entire material holding bottom plate 13. The rotating support plate 14 is provided with a fan-shaped notch 141 centered on the axis of the rotating shaft 12, and the angle of the fan-shaped notch 141 is α. According to the use requirements, α should be slightly larger than the vertex angle corresponding to the triangular area. For this embodiment, α needs to be slightly larger than 45 degrees, and α in this embodiment is designed to be 60 degrees.

[0033] In the initial position, the fan-shaped notch 141 is opposite to the triangular area where the material holding bottom plate 13 is not arranged. The fan-shaped notch 141 is opposite to the triangular area, that is, the radial symmetry line of the fan-shaped notch 141 coincides with the radial symmetry line of the triangular area, so that the rotating support plate 14 can intermittently rotate 45 degrees an unlimited number of times, and ensure that the fan-shaped notch 141 and the triangular area are opposite to each other during the intermittent stop. When the rotating support plate 14 rotates to the point where the fan-shaped notch 141 is opposite to the triangular area where any material holding bottom plate 13 is located, the material holding bottom plate 13 loses the supporting function of the rotating support plate 14, and the material holding bottom plate 13 is only rotatably connected to the frame, so the material holding bottom plate 13 can rotate by itself under the action of gravity.

[0034] The feeding device 1 of this embodiment can be suspended above the smelting furnace by a gantry or a gantry crane, etc., and the regular octagonal frame 11 and the rotating shaft 12 can be suspended separately, and the regular octagonal frame 11 is fixed, while the rotating shaft 12 can rotate. In the initial position, the regular octagonal frame 11 and the rotating support plate 14 are both kept horizontal. When the feeding device 1 of this embodiment is used, the material to be added is stacked on the material holding bottom plate 13, and the rotating shaft 12 and the rotating support plate 14 are intermittently rotated by hand, so that the fan-shaped notches 141 are opposite to the triangular area where the material holding bottom plate 13 is located one by one. When the fan-shaped notches 141 are opposite to the triangular area, the material holding bottom plate 13 in the triangular area rotates downward around the frame under the action of its own gravity and the gravity of the material, so that the material on the material holding bottom plate 13 falls into the smelting furnace. After all the material holding bottom plates 13 are rotated, the material holding bottom plates 13 are manually restored to the initial position one by one, that is, the horizontal material holding position, and then the material can be stacked again. Of course, the rotating support plate 14 also returns to the initial position to support the entire material holding bottom plate 13 again.

[0035] Embodiment 2:

[0036] like Figure 2 As shown, this embodiment introduces a smelting system using the feeding device 1 in the first embodiment, which includes a blowing pipe 2 and a smelting furnace 3 with an upper opening in addition to the feeding device 1. The feeding device 1 is suspended above the opening of the smelting furnace 3 by a gantry (not shown in the figure), the outlet end of the blowing pipe 2 extends into the smelting furnace 3, and the inlet end of the blowing pipe 2 is connected to an external gas source. The blowing pipe 2 can be made of silicon carbide material, and the blowing pipe 2 can be fixed on the gantry (not shown in the figure) or fixed under the regular octagonal frame 11, but it should avoid the falling area.

[0037] Embodiment three:

[0038] like Figure 1 and Figure 2 As shown, this embodiment introduces an alloying smelting method using the smelting system of the second embodiment: the materials are placed on the material holding bottom plate 13 in sequence, and in the initial position, the fan-shaped notch 141 and the triangular area where the material holding bottom plate 13 is not arranged face each other. The feeding device 1 is suspended above the opening of the smelting furnace 3. When feeding, the rotating shaft 12 is first rotated 45 degrees counterclockwise to make the fan-shaped notch 141 and the triangular area where the adjacent material holding bottom plate 13 is located face each other. When the fan-shaped notch 141 and the triangular area face each other, the material holding bottom plate 13 in the triangular area rotates automatically to make the material on the triangular bottom plate fall into the smelting furnace 3. After a certain period of time, the rotating shaft 12 is rotated 45 degrees counterclockwise again, and the above-mentioned subsequent actions are repeated until all the material dropping work is completed.

[0039] During the smelting process, a smelting protective gas is blown into the molten metal in the smelting furnace 3 through the blowing pipe 2. Commonly used protective gases include inert gases such as argon and nitrogen. On the one hand, the molten metal can be stirred by blowing in the gas to accelerate the homogenization of the alloy, and on the other hand, the oxidation of the molten metal can be prevented to a certain extent. In other embodiments, a smelting reducing gas can also be blown in according to the composition of the molten metal.

[0040] Embodiment 4:

[0041] like Figure 3 As shown, this embodiment is improved on the basis of the first embodiment to obtain an improved feeding device 4. In this embodiment, the regular octagonal frame 11 surrounded by round steel in the first embodiment is replaced by a regular octagonal frame 41 surrounded by square steel tubes. In other embodiments, regular octagonal frames surrounded by other profiles or plates may also be used, such as I-beam profiles, channel steel profiles, steel plates, etc.

[0042] In this embodiment, the rotating shaft 12 in the first embodiment is changed into a cylindrical shaft 42, and the rotating support plate 43 is fixedly connected to the lower end of the cylindrical shaft 42, and a paddle core shaft 44 is coaxially penetrated in the cylindrical shaft 42. The lower end of the paddle core shaft 44 passes through the rotating support plate 43 and is exposed on the rotating support plate 43, and the upper end of the paddle core shaft 44 is exposed on the cylindrical shaft 42. The part of the paddle core shaft 44 exposed on the rotating support plate 43 is fixedly connected with a paddle 441, and the paddle 441 is used to extend into the molten metal in the smelting furnace to stir the molten metal and / or paddle the covering layer floating above the molten metal. The paddle 441 can be made of graphite material. In addition, in order to make the rotation between the cylindrical shaft 42 and the paddle core shaft 44 smooth, a bearing can be added between the cylindrical shaft 42 and the paddle core shaft 44.

[0043] The material holding bottom plate in this embodiment is a triangular bottom plate 45 adapted to the triangular area in the regular octagonal frame 41. Adaptation here generally means that the bottom side of the triangular bottom plate 45 is parallel to the frame corresponding to the triangular area where the triangular bottom plate 45 is located, and the sharp angle on the triangular bottom plate 45 opposite to the bottom side points to the center of the regular octagonal frame 41, or the sharp point of the sharp angle coincides with the center of the regular octagonal frame 41. In this embodiment, a missing corner for avoiding the cylindrical shaft 42 is set on the sharp angle end of the triangular bottom plate 45 close to the cylindrical shaft 42, and the bottom side of the triangular bottom plate 45 and the frame of the regular octagonal frame 41 are rotatably connected by hinges, and in other embodiments, they can also be flipped and connected by flipping hinges.

[0044] The rotating support plate 43 in this embodiment is a circular plate, and the rotating support plate 43 is coaxial with the cylindrical shaft 42. Generally, the radius of the rotating support plate 43 is 1 / 3 to 1 / 2 of the radius of the regular octagonal frame 41. The radius of the rotating support plate 43 in this embodiment is set to 1 / 3 of the radius of the regular octagonal frame 41. The angle α of the sector notch 431 is also 60 degrees.

[0045] The two sides of the triangular bottom plate 45 except the bottom side in this embodiment are respectively fixedly connected with side baffles 451, and the two side baffles 451 are respectively perpendicular to the triangular bottom plate 45. In other embodiments, the free ends (i.e., the upper edges) of the two side baffles 451 can be inclined toward the center of the triangular bottom plate 45, and of course, can also be inclined in a direction away from the center of the triangular bottom plate 45. Whether the side baffles 451 are vertical or inclined, each triangular bottom plate 45 and the two side baffles 451 thereon can form an independent grid for accommodating materials. The bottom side of the triangular bottom plate 45 in this embodiment is shorter than the frame of the regular octagonal frame 41, so that when the triangular bottom plate 45 rotates, it can avoid the interference between the rotating side baffles 451 and the adjacent static side baffles 451.

[0046] In this embodiment, one of the two side baffles 451 on each triangular bottom plate 45 is shorter than the other side baffle 451, so that the two side baffles 451 form a discharge port 452 for unloading at the notched end of the triangular bottom plate 45. After the triangular bottom plate 45 rotates downward, the materials on the triangular bottom plate 45 can be unloaded from the discharge port 452.

[0047] In this embodiment, a bottom side panel 46 is fixedly connected to each frame of the regular octagonal frame 41. In the initial position, a material receiving cavity with an open top is formed between each independent grid slot and the corresponding bottom side panel 46. In this embodiment, these bottom side panels 46 are connected end to end in sequence, so as to form a regular octagonal fence on the regular octagonal frame 41, which can enhance the structural strength. Of course, the bottom side panel may not be provided on the frame corresponding to the triangular area where the triangular bottom panel 45 is not provided.

[0048] The barrel shaft 42 in this embodiment is connected to the first reducer 421, which is further connected to the first motor 422, which is a servo motor. The part of the paddle spindle 44 in this embodiment that is exposed at the upper end of the barrel shaft 42 is connected to the second reducer 442, which is further connected to the second motor 443, which is also a servo motor. This embodiment uses a combination of a servo motor and a reducer as a driving source, which can provide sufficiently powerful torque on the one hand, and achieve more precise control on the other hand.

[0049] In addition, in this embodiment, a handle 423 for manually rotating the cylinder shaft 42 is connected to the cylinder shaft 42, and a spindle handle 444 for rotating the paddle spindle 44 is connected to the portion of the paddle spindle 44 exposed at the upper end of the cylinder shaft 42. The handle 423 and the spindle handle 444 are usually made of stainless steel, and the handle 423 and the spindle handle 444 are generally used for backup, that is, when the first motor 422 and / or the second motor 443 drive unexpectedly, the handle 423 and / or the spindle handle 444 can be manually pulled to rotate manually.

[0050] As a simplified structural form, the regular octagonal frame in this embodiment can be directly surrounded by the bottom side panels, and the triangular bottom panel is directly connected to the corresponding bottom side panels by hinges. This simplified form does not deviate from the design concept of the present invention and should be within the protection scope of the present invention.

[0051] Embodiment five:

[0052] like Figure 4 As shown, this embodiment is a modified feeding device 5 obtained by deforming and modifying the fourth embodiment. The difference between this embodiment and the fourth embodiment is that: in this embodiment, a sleeve 51 is mounted on the outer side of the cylinder shaft 42, and the two side baffles on the triangular bottom plate 45 are removed, and then eight side partitions 52 are fixedly connected to the regular octagonal frame 41, each side partition 52 is perpendicular to the regular octagonal frame 41, each side partition 52 is arranged along the radial direction of the regular octagonal frame 41 and passes through the vertices of the regular octagonal frame 41 respectively, and the side partitions 52 are fixedly connected to the sleeve 51, so that in the initial position, an open material storage cavity is formed between two adjacent side partitions 52, the triangular bottom plate 45 located between the two adjacent side partitions 52, the bottom side enclosure 46 and the sleeve 51.

[0053] In order to ensure smooth rotation between the cylindrical shaft 42 and the sleeve 51 , a bearing may be provided between the cylindrical shaft 42 and the sleeve 51 .

[0054] In the initial position, the lower edges of the triangular bottom plate 45 and the side partition plates 52 are flush, and in other embodiments, the triangular bottom plate 45 may also abut against the lower edges of the side partition plates 52. In this embodiment, no baffle is provided on the triangular bottom plate 45, but the side partition plates 52 are provided on the regular octagonal frame 41, which can also play the role of blocking materials.

[0055] Embodiment six:

[0056] like Figure 5As shown, this embodiment introduces a smelting system using the feeding device 4 of the fourth embodiment. In addition to the feeding device 4, the smelting system also includes a blowing pipe 2 and a smelting furnace 3. The outlet end of the blowing pipe 2 extends into the smelting furnace 3, and the inlet end of the blowing pipe 2 is connected to the external gas source. The feeding device 4 can be suspended above the opening of the smelting furnace 3 using a gantry (not shown in the figure), and the paddle 441 extends into the molten metal in the smelting furnace 3 to stir the molten metal and / or move the covering layer floating above the molten metal. The first motor 422 and the second motor 443 are also fixed on the gantry (not shown in the figure). The blowing pipe 2 can be made of silicon carbide material, and the blowing pipe 2 can be fixed on the gantry (not shown in the figure) or fixed below the regular octagonal frame 41, but avoid the falling area.

[0057] Embodiment seven:

[0058] like Figure 3 and Figure 5 As shown, this embodiment introduces an alloying smelting method. This method uses the smelting system of Example 6 to place materials on the triangular base plate 45 in sequence. In the initial position, the fan-shaped notch 431 is opposite to the triangular area where the triangular base plate 45 is not arranged. The frontmost contour of the paddle 441 in the counterclockwise direction is opposite to the rear side of the fan-shaped notch 431 in the counterclockwise direction. During the smelting process, the reducing gas for smelting is blown into the molten metal in the smelting furnace 3 through the blowing pipe 2. During the smelting process, the first motor 422 is used to drive the barrel shaft 42 to rotate 45 degrees counterclockwise so that the fan-shaped notch 431 and the triangular area where the adjacent triangular base plate 45 is located are opposite. When the fan-shaped notch 431 and the triangular area are opposite, the triangular base plate 45 in the triangular area rotates downward by itself so that the material on the triangular base plate 45 falls into the smelting furnace 3. When the cylinder shaft 42 rotates, the second motor 443 is used to drive the paddle mandrel 44 and the paddle 441 to rotate counterclockwise by 110 degrees to remove the covering layer floating above the molten metal below the triangular area where the triangular bottom plate 45 to be turned over is located. After the blanking is completed, the paddle mandrel 44 rotates 65 degrees clockwise to restore the paddle 441 to the position where the frontmost contour of the paddle 441 in the counterclockwise direction and the rear side of the fan-shaped notch 431 in the counterclockwise direction face each other. After a certain period of time, the cylinder shaft 42 is rotated counterclockwise by 45 degrees again, and the above-mentioned subsequent actions are repeated until all blanking work is completed.

[0059] The first motor 422 and the second motor 443 may be controlled by one servo controller, or may be controlled by two servo controllers by collecting signals or calculating time.

[0060] like Figure 6As shown, the alignment requirements of the blade 441 and the fan-shaped notch 431 in this embodiment are: in the initial position, the M side of the blade 441 and the N side of the fan-shaped notch 431 are opposite in the top view; when the barrel shaft 42 rotates 45 degrees counterclockwise, the blade 441 rotates 110 degrees counterclockwise, and after the blanking is completed, the blade 441 rotates 65 degrees clockwise, so that the M side of the blade 441 and the N side of the fan-shaped notch 431 are opposite in the top view again, in preparation for the next blanking.

[0061] The reducing gas used for smelting can be a reducing gas such as nitric oxide. On the one hand, the molten metal can be stirred by blowing in the gas to accelerate the homogenization of the alloy. On the other hand, the oxide inclusions in the molten metal can be reduced to further purify the alloy.

[0062] The above are only six specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using the design concept of the present invention fall within the protection scope of the present invention.

Claims

1. A feeding device, characterized in that: It comprises a regular n-gon frame, a rotating shaft perpendicular to the regular n-gon frame and passing through the center of the regular n-gon frame, wherein n is greater than or equal to 3, a triangular area is formed between each frame of the regular n-gon frame and the center of the regular n-gon frame, and a material holding bottom plate for holding materials is laid in each of the triangular areas except one of the triangular areas, and the material holding bottom plate and the frame corresponding to the triangular area where the material holding bottom plate is located are rotatably connected or flipped; one end of the rotating shaft is fixedly connected with a rotating support plate for supporting all the material holding bottom plates, and a fan-shaped notch with the axis of the rotating shaft as the center is provided on the rotating support plate, and the angle of the fan-shaped notch is α, and α is greater than 360 / n degrees; in the initial position, the fan-shaped notch is opposite to the triangular area where no material holding bottom plate is arranged, and when the rotating support plate rotates to the point where the fan-shaped notch is opposite to the triangular area where any material holding bottom plate is located, the material holding bottom plate loses the support of the rotating support plate and rotates or flips by itself under the action of gravity.

2. The feeding device according to claim 1, characterized in that: The material holding bottom plate is a triangular bottom plate adapted to the triangular area, and the pointed end of the triangular bottom plate close to the rotating shaft is provided with a missing corner for avoiding the rotating shaft, and the bottom edge of the triangular bottom plate away from the rotating shaft is rotatably connected or flipped connected to the frame of the regular n-gon frame.

3. The feeding device according to claim 1, characterized in that: The rotating support plate is a circular plate, and the rotating support plate and the rotating shaft are coaxial, and the radius of the rotating support plate is 1 / 3 to 1 / 2 of the radius of the regular n-gon frame.

4. The feeding device according to claim 2, characterized in that: The two side edges of the triangular base plate except the bottom edge are respectively fixedly connected with side baffles, each triangular base plate and the two side baffles thereon form an independent grid for accommodating materials, and the two side baffles on each triangular base plate are provided with a discharge port at the notched end of the triangular base plate.

5. The feeding device according to claim 4, characterized in that: Each frame of the regular n-gonal frame is fixedly connected with a bottom side panel, and in the initial position, an open material containing cavity is formed between each independent grid slot and the corresponding bottom side panel.

6. The feeding device according to claim 1, characterized in that: The regular n-gon frame is fixedly connected with n side partitions, each side partition is perpendicular to the regular n-gon frame, and each side partition is arranged along the radial direction of the regular n-gon frame and passes through the vertex of the regular n-gon frame respectively; in the initial position, an open material containing cavity is formed between two adjacent side partitions, the material containing bottom plate located between the two adjacent side partitions, and the rotating shaft.

7. The feeding device according to claim 1, characterized in that: The rotating shaft is a cylindrical shaft, in which a paddle core shaft is coaxially passed, and two ends of the paddle core shaft are respectively exposed at two ends of the cylindrical shaft, and the paddle core shaft passes through a rotating support plate, and the part of the paddle core shaft exposed at the rotating support plate is fixedly connected with a paddle blade.

8. The feeding device according to claim 7, characterized in that: The barrel shaft is connected with a rotating handle, and the paddle core shaft is connected with a core shaft rotating handle.

9. The feeding device according to claim 7, characterized in that: The barrel shaft is transmission connected to the first motor, and the paddle core shaft is transmission connected to the second motor.

10. A smelting system, characterized in that: It comprises the feeding device as described in claim 1, and also comprises an air blowing pipe and a smelting furnace with an upper opening, the feeding device is suspended above the opening of the smelting furnace, the outlet end of the air blowing pipe extends into the smelting furnace, and the inlet end of the air blowing pipe is connected to an external gas source.

11. A smelting system, characterized in that: It includes the feeding device as described in claim 7, and also includes an air blowing pipe and a smelting furnace with an upper opening, the feeding device is suspended above the opening of the smelting furnace, the paddles extend into the smelting furnace, the outlet end of the air blowing pipe extends into the smelting furnace, and the inlet end of the air blowing pipe is connected to an external gas source.

12. An alloying smelting method, characterized in that: By using the smelting system described in claim 10, materials are placed on the material holding bottom plate in sequence. In the initial position, the fan-shaped notch is opposite to the triangular area where the material holding bottom plate is not arranged. By intermittently rotating the rotating shaft 360 / n degrees, the fan-shaped notch is opposite to the triangular area where the material holding bottom plate is located in sequence. When the fan-shaped notch is opposite to the triangular area, the material holding bottom plate in the triangular area rotates or flips automatically to make the material on the triangular bottom plate fall into the smelting furnace. During the smelting process, smelting protective gas or smelting reducing gas is blown into the molten metal in the smelting furnace through the blowing pipe.

13. An alloying smelting method, characterized in that: Using the smelting system described in claim 11, materials are placed on the material holding bottom plate in sequence, and at the initial position, the fan-shaped notch and the triangular area where the material holding bottom plate is not arranged face to face, and the paddle and one of the sides of the fan-shaped notch face to face; The cylinder shaft is rotated intermittently 360 / n degrees to make the fan-shaped notch face the triangular area where the material holding bottom plate is located in turn. When the fan-shaped notch and the triangular area face each other, the material holding bottom plate in the triangular area rotates or turns over automatically to make the material on the material holding bottom plate fall into the smelting furnace. When the cylinder shaft is rotated intermittently or before the cylinder shaft is rotated intermittently, the paddle core shaft is rotated to make the paddle swing to push away the covering layer floating above the molten metal under the triangular area where the material holding bottom plate to be turned over is located. After each swing of the paddle, the paddle is restored to the position where the paddle and the side of the fan-shaped notch face each other. During the smelting process, smelting protective gas or smelting reducing gas is blown into the molten metal in the smelting furnace through the blowing pipe.

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