Device and method for recovering silver from hard silver alloy material

Abstract

The invention discloses a device and method for recovering silver from a hard silver alloy material, and the device for recovering silver from the hard silver alloy material comprises a reaction device, a heating device, a first stirring structure, a second stirring structure and a third stirring structure, the reaction device is provided with a mounting cavity, a first reaction barrel structure and a second reaction barrel structure, the first reaction barrel structure and the second reaction barrel structure are rotatably mounted in the mounting cavity, and the first reaction barrel structure is located on the outer side of the second reaction barrel structure and forms a first reaction cavity and a second reaction cavity. The second reaction barrel structure and the inner wall of the mounting cavity are arranged at intervals to form a third reaction cavity, and the inner wall of the first reaction barrel structure, the inner wall of the second reaction barrel structure and the inner wall of the mounting cavity are provided with a first mounting groove, a second mounting groove and a third mounting groove respectively; a first through hole which can be selectively opened or closed is formed in the side wall, close to the bottom, of the first reaction barrel structure in a penetrating manner.

Description

Technical Field

[0001] The invention relates to the field of chemical technology, and in particular to a device and method for recovering silver from a hard silver alloy material. Background Art

[0002] As an important precious metal, silver is widely used in many fields such as electronics, jewelry, and chemicals. Hard silver alloys are widely used due to their good hardness, wear resistance, and conductivity. However, with the increasing shortage of resources and the improvement of environmental protection requirements, the efficient recovery of silver from hard silver alloy materials has important economic and environmental significance. At present, traditional silver recovery methods include nitric acid dissolution, electrolysis, chemical precipitation, ion exchange, and so on. Taking nitric acid dissolution as an example, this recovery method has a greater safety risk during the recovery process.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a device and method for recovering silver from a hard silver alloy material, aiming to solve the above-mentioned problems in the prior art.

[0005] To achieve the above object, the present invention provides a device for recovering silver from a hard silver alloy material, the device for recovering silver from a hard silver alloy material comprising:

[0006] A reaction device, comprising an installation cavity and a first reaction barrel structure and a second reaction barrel structure rotatably installed in the installation cavity, wherein the first reaction barrel structure is located outside the second reaction barrel structure and forms a first reaction cavity and a second reaction cavity respectively, the second reaction barrel structure is spaced apart from the inner wall of the installation cavity and forms a third reaction cavity, the inner wall of the first reaction barrel structure, the inner wall of the second reaction barrel structure, and the inner wall of the installation cavity are respectively provided with a first installation groove, a second installation groove, and a third installation groove, a side wall of the first reaction barrel structure is penetrated with a first through hole that can be selectively opened or closed near the bottom, an end of the first through hole close to the center of the first reaction barrel structure is provided with a first filter structure, a side wall of the second reaction barrel structure is penetrated with a second through hole that can be selectively opened or closed near the bottom, and an end of the second through hole close to the center of the second reaction barrel structure is provided with a second filter structure;

[0007] A heating device, installed on the inner wall of the installation cavity;

[0008] The first stirring structure, the second stirring structure and the third stirring structure can be movably installed in the first mounting groove, the second mounting groove and the third mounting groove in the radial direction respectively, and the first stirring structure, the second stirring structure and the third stirring structure are tightly matched with the groove walls of the first mounting groove, the second mounting groove and the third mounting groove respectively;

[0009] Wherein, the first stirring structure has a first position and a second position arranged in a radial direction. When the first stirring structure is in the first position, the outer circle of the first stirring structure is connected with the inner wall of the first reaction barrel to form a first arc surface structure. When in the second position, the first stirring structure partially extends out of the first mounting groove in a radial direction.

[0010] The second stirring structure has a third position and a fourth position arranged in the radial direction. When the second stirring structure is in the third position, the outer circle of the second stirring structure is connected with the inner wall of the second reaction barrel to form a second arc surface structure. When the second stirring structure is in the fourth position, the second stirring structure partially extends out of the second mounting groove in the radial direction.

[0011] The third stirring structure has a fifth position and a sixth position arranged radially. When the third stirring structure is at the fifth position, the outer circle of the third stirring structure is connected to the inner wall of the reaction chamber to form a third arc surface structure. When the third stirring structure is at the sixth position, the third stirring structure extends radially out of the third mounting groove.

[0012] Preferably, in the device for recovering silver from the hard silver alloy material, the first stirring structure, the second stirring structure and the third stirring structure are driven by the first driving device to move in the radial direction;

[0013] The first driving device comprises:

[0014] a first drive motor;

[0015] The first-stage gear transmission structure includes a first drive shaft drivingly connected to the first drive motor, a first gear fixed on the first drive shaft, and a second gear meshing with the first gear;

[0016] The second-stage gear transmission structure comprises a first driven shaft, a first worm structure mounted on the first driven shaft, and a first worm wheel meshing with the first worm structure, wherein the second gear is fixed on the first driven shaft; and

[0017] The first output shaft has one end fixed to the first worm gear and the other end fixed to the first stirring structure / the second stirring structure / the third stirring structure.

[0018] Preferably, in the device for recovering silver from the hard silver alloy material, an electromagnetic clutch is provided between the first drive motor and the first-stage gear transmission structure or the second-stage gear transmission structure.

[0019] Preferably, in the device for recovering silver from the hard silver alloy material, the first through hole and the second through hole are respectively provided with a first plugging structure and a second plugging structure movable in the radial direction, the first plugging structure is radially arranged on a side of the first filtering structure away from the center of the first reaction barrel structure, and the second plugging structure is radially arranged on a side of the second filtering structure away from the center of the second reaction barrel structure;

[0020] Wherein, when the first through hole is opened, the first plugging structure radially extends away from the center direction of the first reaction barrel structure; when the first through hole is opened, the first plugging structure radially moves toward the center direction of the first reaction barrel structure and tightly fits with the hole wall of the first through hole;

[0021] When the second through hole is opened, the second plugging structure radially extends away from the center direction of the second reaction barrel structure; when the second through hole is opened, the second plugging structure radially moves toward the center direction of the second reaction barrel structure and tightly fits with the hole wall of the second through hole.

[0022] Preferably, in the device for recovering silver from the hard silver alloy material, the first plugging structure and the second plugging structure are driven to move radially by a second driving device.

[0023] Preferably, in the device for recovering silver from the hard silver alloy material, the second driving device is a driving cylinder.

[0024] In order to achieve the above object, the present invention also provides a method for recovering silver from a hard silver alloy material, wherein the method uses the above device for recovery, and the method comprises:

[0025] Adding a hard silver alloy material whose base is tungsten steel into a first reaction barrel structure, adding nitric acid into the first reaction barrel structure until the silver is completely dissolved, thereby obtaining a first reaction liquid;

[0026] Opening the first through hole to allow the first reaction liquid to enter the second reaction barrel structure after being filtered;

[0027] The first through hole is closed, and sodium chloride is added into the second reaction barrel structure until the reaction is complete to obtain a second solution and silver chloride precipitate;

[0028] Opening the second through hole, allowing the second solution to enter the reaction chamber after being filtered, and the silver chloride precipitate to continue to remain in the second reaction barrel structure;

[0029] Sodium carbonate is added to the silver chloride to react at a first preset temperature to obtain molten liquid silver, which is then cooled to form a shape, wherein the first preset temperature is above 1000°C.

[0030] Preferably, in the method for recovering silver from the hard silver alloy material, the step of adding sodium carbonate to the silver chloride, reacting at a first preset temperature to obtain molten liquid silver, and cooling and forming the molten liquid silver comprises:

[0031] The silver chloride is placed in a graphite crucible and sodium carbonate is added, and the molten liquid silver is poured into a steel mold and formed after natural cooling.

[0032] In order to achieve the above object, the present invention also provides a method for recovering silver from a hard silver alloy material, comprising:

[0033] Adding nitric acid to a hard silver alloy material whose base is tungsten steel, heating to a first preset temperature until the silver is completely dissolved, filtering, and obtaining a first solution;

[0034] adding sodium chloride to the first solution to generate silver chloride precipitate, until the reaction is complete, and filtering out the silver chloride;

[0035] Sodium carbonate is added to the silver chloride to react at a second preset temperature to obtain molten liquid silver, which is then cooled to form a shape, wherein the second preset temperature is above 1000°C.

[0036] Preferably, in the method for recovering silver from the hard silver alloy material, the nitric acid is concentrated nitric acid, and the mass ratio of the hard silver alloy material to the nitric acid is 1:1.

[0037] The present invention has at least the following beneficial effects:

[0038] The present invention provides a reaction device with an installation cavity and a first reaction barrel structure and a second reaction barrel structure rotatably installed in the installation cavity. The first reaction barrel structure is located outside the second reaction barrel structure and forms a first reaction cavity and a second reaction cavity respectively. The second reaction barrel structure is spaced apart from the inner wall of the installation cavity to form a third reaction cavity. The inner wall of the first reaction barrel structure, the inner wall of the second reaction barrel structure, and the inner wall of the installation cavity are respectively provided with a first installation groove, a second installation groove, and a third installation groove. A first through hole that can be selectively opened or closed is penetrated through the side wall of the first reaction barrel structure near the bottom. A first filter structure is provided at one end of the first through hole near the center of the first reaction barrel structure. A second through hole that can be selectively opened or closed is penetrated through the side wall of the second reaction barrel structure near the bottom. A second filter structure is provided at one end of the second through hole near the center of the second reaction barrel structure. In this way, automatic stirring is achieved, and the reaction liquid does not need to be repeatedly replaced with a new container, and is always in the reaction device, thereby reducing safety risks.

[0039] Furthermore, the present invention can automatically adjust the stirring by providing the first stirring structure, the second stirring structure, and the third stirring structure, thereby avoiding problems such as uneven reaction caused by manual adjustment of uneven mixing, reducing manual contact, and further reducing safety risks.

[0040] Furthermore, the stirring structure provided in the present invention does not require frequent shutdowns, and the stirring structure and the degree of stirring can be adjusted even without stopping, thereby further improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of an embodiment of a device for recovering silver from a hard silver alloy material provided by the present invention;

[0042] Figure 2 is a schematic diagram of the first driving device of the present invention;

[0043] Figure 3 It is a schematic diagram of a first embodiment of the method for recovering silver from a hard silver alloy material of the present invention;

[0044] Figure 4 FIG. 1 is a schematic diagram of a second embodiment of the method for recovering silver from a hard silver alloy material according to the present invention.

[0045] 100-device for recovering silver from hard silver alloy material, 1-reaction device, 11-installation chamber, 111-third installation groove, 12-first reaction barrel structure, 121-first reaction chamber, 121a-first installation groove, 122-first through hole, 123-first filtering structure, 13-second reaction barrel structure, 131-second reaction chamber, 131a-second installation groove, 132-second through hole, 133-second filtering structure, 2-heating device, 3-first stirring structure, 4-second stirring structure, 5-third stirring structure, 6-first driving device, 61-first driving motor, 62-first stage gear transmission structure, 621-first driving shaft, 622-first gear, 623-second gear, 63-second stage gear transmission structure, 631-first driven shaft, 632-first worm structure, 633-first worm wheel, 64-first output shaft, 7-electromagnetic clutch.

[0046] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0048] In the embodiments of the present invention, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0050] In the embodiments of the present invention, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0051] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0052] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, it can be understood by those skilled in the art that in the embodiments of the present invention, many technical details are proposed in order to enable the reader to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can also be implemented. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0053] The present invention provides a device for recovering silver from a hard silver alloy material, such as Figure 1 As shown, the device 100 for recovering silver from hard silver alloy material includes a reaction device 1, a heating device 2, and a first stirring structure 3, a second stirring structure 4 and a third stirring structure 5.

[0054] The reaction device 1 comprises an installation chamber 11 and a first reaction barrel structure 12 and a second reaction barrel structure 13 rotatably installed in the installation chamber 11. The first reaction barrel structure 12 is located outside the second reaction barrel structure 13 and forms a first reaction chamber 121 and a second reaction chamber 131 respectively. The second reaction barrel structure 13 is spaced apart from the inner wall of the installation chamber 11 to form a third reaction chamber. The inner wall of the first reaction barrel structure 12, the inner wall of the second reaction barrel structure 13, and the inner wall of the installation chamber 11 are respectively provided with a first installation groove 121a, a second installation groove 121b, and a second installation groove 121c. Groove 131a, and a third installation groove 111, the side wall of the first reaction barrel structure 12 is penetrated with a first through hole 122 that can be selectively opened or closed near the bottom, and the first through hole 122 is provided with a first filter structure 123 at one end near the center of the first reaction barrel structure 12, and the side wall of the second reaction barrel structure 13 is penetrated with a second through hole 132 that can be selectively opened or closed near the bottom, and the second through hole 132 is provided with a second filter structure 133 at one end near the center of the second reaction barrel structure 13; the heating device 2 is installed on the inner wall of the installation cavity 11.

[0055] The first stirring structure 3, the second stirring structure 4 and the third stirring structure 5 can be movably installed in the first mounting groove 121a, the second mounting groove 131a and the third mounting groove 111 respectively in the radial direction, and the first stirring structure 3, the second stirring structure 4 and the third stirring structure 5 are tightly matched with the groove walls of the first mounting groove 121a, the second mounting groove 131a and the third mounting groove 111 respectively.

[0056] The first stirring structure 3 has a first position and a second position arranged in the radial direction. When the first stirring structure 3 is in the first position, the outer circle of the first stirring structure 3 is connected with the inner wall of the first reaction barrel to form a first arc surface structure. When the first stirring structure 3 is in the second position, the first stirring structure 3 extends out of the first mounting groove 121a in the radial direction. In this way, when the first stirring structure 3 is extended, the first reaction barrel structure 12 can be moved.

[0057] The second stirring structure 4 has a third position and a fourth position arranged radially. When the second stirring structure 4 is located at the third position, the outer circle of the second stirring structure 4 is connected to the inner wall of the second reaction barrel to form a second arc surface structure. In the fourth position, the second stirring structure 4 extends radially out of the second mounting groove 131a.

[0058] The third stirring structure 5 has a fifth position and a sixth position arranged radially. When the third stirring structure 5 is at the fifth position, the outer circle of the third stirring structure 5 is connected to the inner wall of the reaction chamber to form a third arc surface structure. When the third stirring structure 5 is at the sixth position, the third stirring structure 5 extends radially out of the third mounting groove 111.

[0059] Specifically, Figure 2 As shown, the first stirring structure 3, the second stirring structure 4 and the third stirring structure 5 are driven to move radially by the first driving device 6; the first driving device 6 includes a first driving motor 61, a first-stage gear transmission structure 62, a second-stage gear transmission structure 63 and a first output shaft 64, the first-stage gear transmission structure 62 includes a first driving shaft 621 drivingly connected to the first driving motor 61, a first gear 622 fixed on the first driving shaft 621, and a second gear 623 meshing with the first gear 622; the second-stage gear transmission structure 63 includes a first driven shaft 631, a first worm structure 632 installed on the first driven shaft 631, and a first worm wheel 633 meshing with the first worm structure 632, and the second gear 623 is fixed on the first driven shaft 631; one end of the first output shaft 64 is fixedly arranged with the first worm wheel 633, and the other end is fixed with the first stirring structure 3 / the second stirring structure 4 / the third stirring structure 5.

[0060] An electromagnetic clutch 7 is provided between the first driving motor 61 and the first-stage gear transmission structure 62 or the second-stage gear transmission structure 63 .

[0061] The first through hole 122 and the second through hole 132 are respectively provided with a first plugging structure and a second plugging structure which can move in the radial direction, wherein the first plugging structure is radially arranged on a side of the first filtering structure 123 away from the center of the first reaction barrel structure 12, and the second plugging structure is radially arranged on a side of the second filtering structure 133 away from the center of the second reaction barrel structure 13; wherein, when the first through hole 122 is opened, the first plugging structure radially extends in a direction away from the center of the first reaction barrel structure 12; when the first through hole 122 is opened, the first plugging structure radially moves in a direction close to the center of the first reaction barrel structure 12 and is tightly matched with the hole wall of the first through hole 122; when the second through hole 132 is opened, the second plugging structure radially extends in a direction away from the center of the second reaction barrel structure 13; when the second through hole 132 is opened, the second plugging structure radially moves in a direction close to the center of the second reaction barrel structure 13 and is tightly matched with the hole wall of the second through hole 132.

[0062] More specifically, the first plugging structure and the second plugging structure are driven to move in radial direction by a second driving device, and the second driving device is a driving cylinder.

[0063] The present invention also provides a method for recovering silver from a hard silver alloy material, wherein the method uses the above-mentioned device to recover silver. Figure 3 The schematic diagram of the method for recovering silver from the hard silver alloy material of the present invention is shown. The method for recovering silver from the hard silver alloy material comprises:

[0064] In step S210, a hard silver alloy material whose base is tungsten steel is added into the first reaction barrel structure 12, and nitric acid is added into the first reaction barrel structure 12 until the silver is completely dissolved to obtain a first reaction solution.

[0065] In step S220, the first through hole 122 is opened to allow the first reaction liquid to enter the second reaction barrel structure 13 after being filtered;

[0066] In step S230, the first through hole 122 is closed, and sodium chloride is added into the second reaction barrel structure 13 until the reaction is complete to obtain a second solution and silver chloride precipitate;

[0067] In step S240, the second through hole 132 is opened to allow the second solution to enter the reaction chamber after being filtered, and the silver chloride precipitate continues to remain in the second reaction barrel structure 13;

[0068] In step S250, sodium carbonate is added to the silver chloride, reacted at a first preset temperature to obtain molten liquid silver, and cooled to form, wherein the first preset temperature is above 1000° C. Specifically, the silver chloride is placed in a graphite crucible and sodium carbonate is added, and the molten liquid silver is poured into a steel mold, and naturally cooled to form.

[0069] The present invention also provides a method for recovering silver from a hard silver alloy material. Figure 4 The schematic diagram of the method for recovering silver from the hard silver alloy material provided by the present invention is shown. Figure 4 As shown, the method for recovering silver from the hard silver alloy material comprises the following steps.

[0070] In step S310, nitric acid is added to the hard silver alloy material whose base is tungsten steel, heated to a first preset temperature until the silver is completely dissolved, and filtered to obtain a first solution. The nitric acid is concentrated nitric acid, and the mass ratio of the hard silver alloy material to the nitric acid is 1:1.

[0071] In step S320, sodium chloride is added to the first solution to generate silver chloride precipitate, and the reaction is continued until the silver chloride is completely filtered out.

[0072] In step S330, sodium carbonate is added to the silver chloride, reacted at a second preset temperature to obtain molten liquid silver, and cooled to form the silver. The second preset temperature is above 1000°C.

[0073] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the present invention.

Claims

1. A device for recovering silver from a hard silver alloy material, characterized in that: include: A reaction device, comprising an installation cavity and a first reaction barrel structure and a second reaction barrel structure rotatably installed in the installation cavity, wherein the first reaction barrel structure is located outside the second reaction barrel structure and forms a first reaction cavity and a second reaction cavity respectively, the second reaction barrel structure is spaced apart from the inner wall of the installation cavity and forms a third reaction cavity, the inner wall of the first reaction barrel structure, the inner wall of the second reaction barrel structure, and the inner wall of the installation cavity are respectively provided with a first installation groove, a second installation groove, and a third installation groove, a side wall of the first reaction barrel structure is penetrated with a first through hole that can be selectively opened or closed near the bottom, an end of the first through hole close to the center of the first reaction barrel structure is provided with a first filter structure, a side wall of the second reaction barrel structure is penetrated with a second through hole that can be selectively opened or closed near the bottom, and an end of the second through hole close to the center of the second reaction barrel structure is provided with a second filter structure; A heating device, installed on the inner wall of the installation cavity; The first stirring structure, the second stirring structure and the third stirring structure can be movably installed in the first mounting groove, the second mounting groove and the third mounting groove in the radial direction respectively, and the first stirring structure, the second stirring structure and the third stirring structure are tightly matched with the groove walls of the first mounting groove, the second mounting groove and the third mounting groove respectively; Wherein, the first stirring structure has a first position and a second position arranged in a radial direction. When the first stirring structure is in the first position, the outer circle of the first stirring structure is connected with the inner wall of the first reaction barrel to form a first arc surface structure. When in the second position, the first stirring structure partially extends out of the first mounting groove in a radial direction. The second stirring structure has a third position and a fourth position arranged in the radial direction. When the second stirring structure is in the third position, the outer circle of the second stirring structure is connected with the inner wall of the second reaction barrel to form a second arc surface structure. When the second stirring structure is in the fourth position, the second stirring structure partially extends out of the second mounting groove in the radial direction. The third stirring structure has a fifth position and a sixth position arranged radially. When the third stirring structure is at the fifth position, the outer circle of the third stirring structure is connected to the inner wall of the reaction chamber to form a third arc surface structure. When the third stirring structure is at the sixth position, the third stirring structure extends radially out of the third mounting groove.

2. The device for recovering silver from hard silver alloy material as claimed in claim 1, characterized in that: The first stirring structure, the second stirring structure and the third stirring structure are driven by a first driving device to move in a radial direction; The first driving device comprises: a first drive motor; The first-stage gear transmission structure includes a first drive shaft drivingly connected to the first drive motor, a first gear fixed on the first drive shaft, and a second gear meshing with the first gear; The second-stage gear transmission structure comprises a first driven shaft, a first worm structure mounted on the first driven shaft, and a first worm wheel meshing with the first worm structure, wherein the second gear is fixed on the first driven shaft; and The first output shaft has one end fixed to the first worm gear and the other end fixed to the first stirring structure / the second stirring structure / the third stirring structure.

3. The device for recovering silver from hard silver alloy material as claimed in claim 2, characterized in that: An electromagnetic clutch is provided between the first drive motor and the first-stage gear transmission structure or the second-stage gear transmission structure.

4. The device for recovering silver from hard silver alloy material as claimed in claim 1, characterized in that: The first through hole and the second through hole are respectively provided with a first plugging structure and a second plugging structure movable in the radial direction, the first plugging structure is radially arranged on a side of the first filter structure away from the center of the first reaction barrel structure, and the second plugging structure is radially arranged on a side of the second filter structure away from the center of the second reaction barrel structure; Wherein, when the first through hole is opened, the first plugging structure radially extends away from the center direction of the first reaction barrel structure; when the first through hole is opened, the first plugging structure radially moves toward the center direction of the first reaction barrel structure and tightly fits with the hole wall of the first through hole; When the second through hole is opened, the second plugging structure radially extends away from the center direction of the second reaction barrel structure; when the second through hole is opened, the second plugging structure radially moves toward the center direction of the second reaction barrel structure and tightly fits with the hole wall of the second through hole.

5. The device for recovering silver from hard silver alloy material as claimed in claim 1, characterized in that: The first plugging structure and the second plugging structure are driven to move in radial direction by a second driving device.

6. The device for recovering silver from hard silver alloy material as claimed in claim 5, characterized in that: The second driving device is a driving cylinder.

7. A method for recovering silver from a hard silver alloy material, characterized in that: The method uses the device according to any one of claims 1 to 6 for recovery, comprising: Adding a hard silver alloy material whose base is tungsten steel into a first reaction barrel structure, adding nitric acid into the first reaction barrel structure until the silver is completely dissolved, thereby obtaining a first reaction liquid; Opening the first through hole to allow the first reaction liquid to enter the second reaction barrel structure after being filtered; The first through hole is closed, and sodium chloride is added into the second reaction barrel structure until the reaction is complete to obtain a second solution and silver chloride precipitate; Opening the second through hole, allowing the second solution to enter the reaction chamber after being filtered, and the silver chloride precipitate to continue to remain in the second reaction barrel structure; Sodium carbonate is added to the silver chloride to react at a first preset temperature to obtain molten liquid silver, which is then cooled to form a shape, wherein the first preset temperature is above 1000°C.

8. The method for recovering silver from a hard silver alloy material as claimed in claim 7, characterized in that: The step of adding sodium carbonate to the silver chloride, reacting at a first preset temperature to obtain molten liquid silver, and cooling to form the molten silver comprises: The silver chloride is placed in a graphite crucible and sodium carbonate is added, and the molten liquid silver is poured into a steel mold and formed after natural cooling.

9. A method for recovering silver from a hard silver alloy material, characterized in that: include: Adding nitric acid to a hard silver alloy material whose base is tungsten steel, heating to a first preset temperature until the silver is completely dissolved, filtering, and obtaining a first solution; adding sodium chloride to the first solution to generate silver chloride precipitate, until the reaction is complete, and filtering out the silver chloride; Sodium carbonate is added to the silver chloride to react at a second preset temperature to obtain molten liquid silver, which is then cooled to form a shape, wherein the second preset temperature is above 1000°C.

10. The method for recovering silver from a hard silver alloy material as claimed in claim 9, characterized in that: The nitric acid is concentrated nitric acid, and the mass ratio of the hard silver alloy material to the nitric acid is 1:1.

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