1. A method for dissolving and purifying precious metals from electronic waste, comprising the following steps:

s1: mixing the electronic waste containing the precious metals with acid liquor, and decomposing the electronic waste through the acid liquor to obtain a decomposition liquid containing the precious metals;

s2: filtering and cleaning the decomposition liquid obtained in the step S1, and removing water-soluble impurities in the decomposition liquid to obtain precious metal powder;

s3: placing the noble metal powder obtained in the step S2 into corresponding drying equipment (1), and drying the noble metal powder through the drying equipment (1);

s4: taking the dried noble metal powder out of the drying device (1), carrying out heating treatment on the noble metal powder through corresponding heating devices, and injecting noble metal liquid into corresponding dies when the noble metal powder is heated to a liquid state;

s5: and cooling the mold, taking the noble metal block out of the mold after the noble metal liquid in the mold is cooled and molded, washing the noble metal block with water, taking the washed noble metal block out of a processing workshop, and finally packaging and protecting.

2. The method for dissolving and purifying precious metals from electronic waste according to claim 1, wherein a storage cavity (2) and a drying cavity (3) are formed inside the drying device (1), a storage box body (4) is movably sleeved inside the storage cavity (2), a supporting mechanism for supporting the storage box body (4) is arranged inside the storage cavity (2), a plurality of vent holes (5) are formed in the inner wall between the storage cavity (2) and the drying cavity (3), a plurality of fans (6) are vertically fixed on the inner wall of the drying cavity (3) far away from the side of the storage cavity (2), heating wires (7) are installed on the inner wall of the drying cavity (3) close to the side of the storage cavity (2), a driving motor (8) is fixed on the inner wall of the top of the storage cavity (2), and a worm (9) is connected to the output end of the driving motor (8), the other end of the worm (9) penetrates through the storage box body (4) and is rotatably connected to the inner wall of the bottom of the storage cavity (2) through a bearing, and a plurality of stirring rods (10) which are rotatably sleeved in the storage box body (4) are fixed on the outer wall of the worm (9) inside the storage box body (4).

3. The method for dissolving and purifying precious metals from electronic waste according to claim 2, wherein the supporting mechanism comprises supporting columns (18) located at two sides of the storage box body (4), the supporting columns (18) are fixed on the inner wall of the top of the storage cavity (2), two sides of two ends of the storage box body (4) are fixed with connecting lugs (19) slidably connected with the inner wall of the storage cavity (2), the middle parts of the connecting lugs (19) are respectively provided with sliding holes (11), the sliding holes (11) are respectively sleeved outside the corresponding supporting columns (18), a rotating column (13) is arranged below the storage box body (4), two ends of the rotating column (13) are respectively rotatably connected on the inner walls of two sides of the storage cavity (2) through bearings, the outer wall of the middle part of the rotating column (13) is fixedly sleeved with a worm wheel (14), and the worm wheel (14) is meshed with a worm (9), the outer wall at both ends of the rotating column (13) is fixedly sleeved with a cam (15) which is rotatably sleeved inside the storage cavity (2), and the cam (15) and the storage box body (4) are matched for working.

4. The method for dissolving and purifying precious metals from electronic waste materials according to claim 2, wherein one side of the outside of the drying device (1) is hinged with a first movable door (16), one side of the outside of the containing box body (4) is hinged with a second movable door (17), and the outer wall of the first movable door (16) is provided with a sealing ring along the circumferential direction.

5. The method for dissolving and purifying precious metal from electronic waste according to claim 2, wherein the receiving box (4) is opened with a plurality of ventilation holes, and the diameter of the precious metal powder is larger than the diameter of the ventilation holes.

6. The method for dissolving and purifying precious metals from electronic waste according to claim 2, wherein the two ends of the storage box (4) are provided with connecting holes, and the worm (9) is slidably connected inside the connecting holes.

7. The method for dissolving and purifying precious metals from electronic waste according to claim 3, wherein the outside of the connecting lug (19) is fixed with a supporting spring (12) movably sleeved outside the corresponding supporting column (18), and the other end of the supporting spring (12) is fixed on the corresponding supporting column (18).

Background

With the development of industrial production, the amount of industrial waste is increasing. The industrial waste is large in quantity, various in types, complex in components and quite difficult to treat.

Although industrial solid waste can be disposed of, a certain amount of precious metals are present in industrial solid waste, and the precious metals in the industrial solid waste are lost after the industrial solid waste is disposed of by a method such as stacking or landfill, a large amount of resources are wasted in the process, and therefore, a method for dissolving and purifying the precious metals from electronic waste is proposed.

Disclosure of Invention

The method for dissolving and purifying the precious metal from the electronic waste provided by the invention solves the problem of poor utilization efficiency of industrial solid waste.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for dissolving and purifying precious metals from electronic waste, comprising the following steps:

s1: mixing the electronic waste containing the precious metals with acid liquor, and decomposing the electronic waste through the acid liquor to obtain a decomposition liquid containing the precious metals;

s2: filtering and cleaning the decomposition liquid obtained in the step S1, and removing water-soluble impurities in the decomposition liquid to obtain precious metal powder;

s3: placing the noble metal powder obtained in the step S2 into corresponding drying equipment, and drying the noble metal powder by the drying equipment;

s4: taking the dried noble metal powder out of the drying equipment, heating the noble metal powder by corresponding heating equipment, and injecting the noble metal liquid into a corresponding mould when the noble metal powder is heated to a liquid state;

s5: and cooling the mold, taking the noble metal block out of the mold after the noble metal liquid in the mold is cooled and molded, washing the noble metal block with water, taking the washed noble metal block out of a processing workshop, and finally packaging and protecting.

Preferably, storage cavity and dry chamber have been seted up to drying equipment's inside, the inside movable sleeve that stores in the chamber is equipped with the storage box body, the inside of storing in the chamber is equipped with the supporting mechanism who supports the storage box body, the inner wall of storing between chamber and the dry chamber has seted up a plurality of ventilation holes, the inner wall of storing in chamber one side is kept away from in the dry chamber is along vertical a plurality of fans that are fixed with, the dry chamber is close to the inner wall of storing in chamber one side and installs the heater strip, the inner wall of storing in chamber top is fixed with driving motor, driving motor's output transmission is connected with the worm, the storage box body is run through to the other end of worm to rotate through the bearing and connect on the inner wall of storing in chamber bottom, the worm outer wall that is located the storage box body inside is fixed with a plurality of rotation covers and establish the stirring rod of storing in the storage box body.

Preferably, the supporting mechanism is including the support column that is located the containing box both sides, the support column is all fixed on the inner wall at containing chamber top, the both sides at containing box both ends all are fixed with and accomodate chamber inner wall sliding connection's engaging lug, the slide opening has all been seted up at the middle part of engaging lug, the slide opening is established respectively the cover and is established corresponding support column outside, the below of containing box is equipped with the rotation post, the both ends of rotating the post are passed through the bearing and are rotated respectively and connect on the inner wall of accomodating the chamber both sides, the fixed cover of outer wall at rotation post middle part has connect the worm wheel, worm wheel and worm meshing work, the outer wall at rotation post both ends all fixed cover has been cup jointed and has been established the cam of accomodating.

Preferably, one side of the outside of the drying equipment is hinged with a first movable door through a hinge, one side of the outside of the containing box body is hinged with a second movable door through a hinge, and a sealing ring is arranged on the outer wall of the first movable door along the circumferential direction.

Preferably, the containing box body is provided with a plurality of ventilation holes, and the diameter of the precious metal powder is larger than the aperture of the ventilation holes.

Preferably, the connecting holes are formed in the two ends of the containing box body, and the worm is connected to the inside of the connecting holes in a sliding mode.

Preferably, the outer sides of the connecting lugs are respectively fixed with a supporting spring movably sleeved outside the corresponding supporting column, and the other ends of the supporting springs are respectively fixed on the corresponding supporting columns.

In the invention:

1. the method can quickly and efficiently purify and collect the precious metals of the electronic waste in the industrial solid waste, has simple purification method and convenient use of processing equipment used for purification, further effectively improves the extraction and storage progress of the precious metals, and has high recovery efficiency.

2. The invention can quickly dry the extracted noble metal powder and uniformly stir the dried noble metal powder, thereby improving the area of the noble metal powder for receiving hot air flow, effectively improving the drying efficiency of the noble metal powder, and vibrating the noble metal in drying in a reciprocating way, thereby preventing the noble metal powder from blocking the ventilation hole of the drying equipment and effectively improving the working efficiency of the drying equipment.

Drawings

FIG. 1 is a schematic structural diagram of a drying apparatus in a method for dissolving and purifying precious metals from electronic waste according to the present invention;

FIG. 2 is a front view of a drying apparatus in a method for dissolving and purifying precious metals from electronic scrap according to the present invention;

fig. 3 is a front view of a storage box in a method for dissolving and purifying precious metals from electronic scrap according to the present invention.

Reference numbers in the figures: 1. a drying device; 2. a receiving cavity; 3. a drying chamber; 4. a storage box body; 5. a vent hole; 6. a fan; 7. heating wires; 8. a drive motor; 9. a worm; 10. a stirring rod; 11. a slide hole; 12. a support spring; 13. rotating the column; 14. a worm gear; 15. a cam; 16. a first movable door; 17. a second movable door; 18. and (4) a support column.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, a method for dissolving and purifying precious metals from electronic scrap comprises the following steps:

s1: mixing the electronic waste containing the precious metals with acid liquor, and decomposing the electronic waste through the acid liquor to obtain a decomposition liquid containing the precious metals;

s2: filtering and cleaning the decomposition liquid obtained in the step S1, and removing water-soluble impurities in the decomposition liquid to obtain precious metal powder;

s3: placing the noble metal powder obtained in the step S2 into corresponding drying equipment 1, and drying the noble metal powder by the drying equipment 1;

s4: taking the dried noble metal powder out of the drying device 1, carrying out heating treatment on the noble metal powder through corresponding heating devices, and injecting the noble metal liquid into a corresponding mould when the noble metal powder is heated to a liquid state;

s5: and cooling the mold, taking the noble metal block out of the mold after the noble metal liquid in the mold is cooled and molded, washing the noble metal block with water, taking the washed noble metal block out of a processing workshop, and finally packaging and protecting.

Storage cavity 2 and dry chamber 3 have been seted up to drying equipment 1's inside, the inside movable sleeve of storage cavity 2 is equipped with storage box 4, storage cavity 2's inside is equipped with the supporting mechanism who supports storage box 4, a plurality of ventilation holes 5 have been seted up to the inner wall between storage cavity 2 and the dry chamber 3, the inner wall that storage cavity 2 one side was kept away from in dry chamber 3 is along vertical a plurality of fans 6 that are fixed with, dry chamber 3 is close to the inner wall of storage cavity 2 one side and installs heater strip 7, the inner wall at storage cavity 2 top is fixed with driving motor 8, driving motor 8's output transmission is connected with worm 9, the other end of worm 9 runs through storage box 4, and rotate through the bearing and connect on the inner wall of storage cavity 2 bottom, the worm 9 outer wall that is located storage box 4 inside is fixed with a plurality of rotation covers and establishes stirring rod 10 at storage box 4 inside.

The supporting mechanism comprises supporting columns 18 located on two sides of a containing box body 4, the supporting columns 18 are all fixed on the inner wall of the top of a containing cavity 2, connecting lugs 19 which are connected with the inner wall of the containing cavity 2 in a sliding mode are fixed on two sides of two ends of the containing box body 4, sliding holes 11 are all formed in the middle of the connecting lugs 19, the sliding holes 11 are respectively sleeved on the corresponding supporting columns 18, a rotating column 13 is arranged below the containing box body 4, two ends of the rotating column 13 are respectively connected onto the inner walls of two sides of the containing cavity 2 in a rotating mode through bearings in a rotating mode, a worm wheel 14 is fixedly sleeved on the outer wall of the middle of the rotating column 13, the worm wheel 14 is meshed with a worm 9, cams 15 which are rotatably sleeved on the inner portions of the containing cavity 2 are fixedly sleeved on the outer walls of two ends of the rotating column 13, and the cams 15 and the containing box body 4 are matched.

Drying equipment 1 outside one side has first dodge gate 16 through the hinge is articulated, and storage box 4 outside one side has second dodge gate 17 through the hinge is articulated, and first dodge gate 16's outer wall is equipped with the sealing washer along circumference, and through opening first dodge gate 16, the user can overhaul the part of drying equipment 1 inside and maintain, through opening second dodge gate 17, the user can take out and place the inside metal powder of storage box 4.

A plurality of ventilation holes are formed in the storage box body 4, the diameter of the precious metal powder is larger than the diameter of each ventilation hole, and the drying rate of the precious metal powder in the storage box body 4 can be increased through the ventilation holes.

Connecting holes are formed in the two ends of the storage box body 4, the worm 9 is connected inside the connecting holes in a sliding mode, and the storage box body 4 can perform flexible vertical displacement through the connecting holes.

The outer sides of the connecting lugs 19 are respectively fixed with a supporting spring 12 movably sleeved outside the corresponding supporting column 18, the other end of the supporting spring 12 is respectively fixed on the corresponding supporting column 18, and the containing box body 4 can be supported through the supporting spring 12.

The working principle is as follows: mixing electronic waste containing noble metal with acid liquor, decomposing the electronic waste by the acid liquor to obtain decomposed liquid containing noble metal, filtering and cleaning the decomposed liquid obtained, removing water-soluble impurities in the decomposed liquid to obtain noble metal powder, opening a first movable door 16 and a second movable door 17, placing the noble metal powder in the storage box body 4, closing the first movable door 16 and the second movable door 17, driving air in the drying cavity 3 by the operation of a fan 6, heating the air driven by the fan 6 by the operation of a heating wire 7, blowing the heated air into the storage cavity 2 through a vent hole 5, drying the noble metal powder in the storage box body 4 by hot air in the storage cavity 2, and drying the noble metal powder by the hot air in the storage cavity 2, at the moment, the worm 9 can be driven to rotate by the operation of the driving motor 8, the stirring rod 10 can be driven to rotate by the rotating worm 9, the noble metal powder in the containing box 4 can be uniformly stirred by the rotating stirring rod 10, so that the area of the noble metal powder for receiving hot air flow is increased, the drying efficiency of the noble metal powder is effectively increased, the worm wheel 14 can be driven to rotate when the worm 9 rotates, the rotating column 13 can be driven to rotate by the rotating worm wheel 14, the cam 15 can be driven to rotate by the rotating column 13, the containing box 4 can be intermittently ejected by the rotating cam 15, the containing box 4 can be driven to perform reciprocating vertical oscillation by the elasticity of the supporting spring 12 through the sliding fit work of the sliding hole 11 and the supporting column 18, therefore, the noble metal powder is prevented from blocking the ventilation hole, the air inlet efficiency of the storage box body 4 is effectively improved, after the noble metal powder in the storage box body 4 is dried, the first movable door 16 and the second movable door 17 are opened, the dried noble metal powder is taken out of the storage box body 4, then the noble metal powder is heated through corresponding heating equipment, when the noble metal powder is heated to a liquid state, the noble metal liquid can be injected into a corresponding mold at the moment, the mold is cooled, after the noble metal liquid in the mold is cooled and formed, the noble metal block is taken out of the mold, the noble metal block is washed with water, then the washed noble metal block is taken out of a processing workshop, and finally packaging protection is carried out.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.