Recovery assembly and device for pyrogenic purification of noble metal

Abstract

The utility model discloses a recovery assembly and device for pyrogenic purification of noble metals, which comprises a capture carrier arranged between a gas collecting hood and a crucible, and the capture carrier is provided with a capture part for powder mixed in volatile matters discharged from the crucible to adhere and a first through hole for gas in the volatile matters to pass through; compared with the prior art, powder mingled in volatile matter is attached to the catching part on the catching carrier, gas in the volatile matter penetrates through the first penetrating holes, gas discharging is not hindered, meanwhile, the powder can be intercepted and recycled, and loss of precious metal is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pyrogenic purification technical field, concretely relates to a recovery assembly for noble metal pyrogenic purification and its device. BACKGROUND

[0002] The existing platinum alloy pyrogenic purification mode is that the platinum ingot is placed in the crucible, the medium frequency heating furnace and the air extraction system are opened, the induction coil of the medium frequency heating furnace acts on the crucible, the temperature in the crucibble is as high as 1800 DEG C, to melt the platinum ingot into liquid state, then the gas steel bottle is opened, the chlorine or oxygen in the gas steel bottle is guided to the top of the platinum liquid in the crucible through the air pipe, to carry out the purification work.

[0003] However, the platinum ingot generates platinum chloride or platinum oxide powder during the purification process, the powder is mixed in the gas generated in the crucible and is extracted by the air extraction system, cannot be recycled, and causes the loss of noble metal. SUMMARY

[0004] In view of the defects in the prior art, the utility model aims at providing a recovery assembly for noble metal pyrogenic purification and its device, to solve the problem that the powder mixed in the volatile matter cannot be recycled during the purification process in the prior art, causing the loss of noble metal.

[0005] To achieve the above object, the utility model adopts the following technical scheme in the first aspect: a recovery assembly for noble metal pyrogenic purification is arranged between the gas collection cover and the crucible of the air extraction system, and comprises a capture carrier arranged between the gas collection cover and the crucible, the capture carrier has a capture part for the powder mixed in the volatile matter discharged from the crucible to adhere to, and a first through hole for the gas in the volatile matter to pass through.

[0006] The utility model adopts the following technical scheme in the second aspect: a noble metal pyrogenic purification device comprises a gas collection cover and a crucible, and further comprises a recovery assembly for noble metal pyrogenic purification as described in the first aspect of the utility model.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] The recovery assembly mainly comprises a capture carrier fixedly arranged between the gas collection cover and the crucible, the capture part on the capture carrier is for the powder mixed in the volatile matter to adhere to, and the first through hole is for the gas in the volatile matter to pass through, so that the gas can be discharged without hindrance, and the powder can be intercepted and recycled, reducing the loss of noble metal. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a structural schematic view of an embodiment of the utility model;

[0010] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0011] Figure 3 for Figure 1 A schematic diagram of the middle adjustment block and its internal arrangement.

[0012] The reference numerals in the accompanying drawings include: 1. Capturing carrier; 2. Fixing part; 21. Support; 22. Fixing carrier; 23. Support block; 3. Vent pipe; 4. Crucible; 5. Medium frequency heating furnace; 6. Gas collection hood; 7. Induction coil; 8. Adjusting component; 81. Adjusting block; 82. Slide groove; 83. Clamping claw; 831. Connecting section; 832. Clamping section; 833. Inlet section; 84. Elastic support; 85. Adjusting rod; 86. Operating rod; 87. Limiting hole; 88. Limiting post; 89. Fixing through hole. Detailed Implementation

[0013] The present invention will be further described in detail below through specific embodiments:

[0014] During the purification process of platinum ingots, powders such as platinum chloride or platinum oxide are generated. These powders are trapped in the gas produced inside crucible 4 and are drawn away by the ventilation system, making them unrecoverable and resulting in the loss of precious metals. To solve this problem, such as... Figure 1 As shown, this utility model embodiment proposes a recovery component for pyrometallurgical purification of precious metals, which is set between the gas collection hood 6 and the crucible 4 of the exhaust system. It includes a capture carrier 1 set between the gas collection hood 6 and the crucible 4. The capture carrier 1 has a capture part for the powder mixed in the volatiles discharged from the crucible 4 to adhere to, and a first permeable hole for the gas in the volatiles to pass through.

[0015] This recycling assembly mainly includes a capture carrier 1 fixedly installed between the gas collection hood 6 and the crucible 4. The capture part on the capture carrier 1 is for the powder mixed in with the volatiles to adhere to, and the first through hole is for the gas in the volatiles to pass through. This will not hinder the gas from being discharged, but will also intercept the powder for recycling, thereby reducing the loss of precious metals.

[0016] In this scheme, the capture carrier 1 has two structures, which will be further explained below.

[0017] The first structure of the capture carrier 1, such as Figure 1 As shown, according to another embodiment of the present invention, in the recovery component for pyrometallurgical purification of precious metals, when oxygen is discharged from the gas cylinder during the purification process of platinum ingots, the capturing carrier 1 is a foam ceramic plate, the holes on the foam ceramic plate are the first permeable holes for the gas in the volatiles to pass through, and the solid part of the foam ceramic plate is the capturing part. When the volatiles pass through the holes on the foam ceramic plate, the powder (oxides) mixed in the volatiles adhere to the foam ceramic plate for recovery.

[0018] The second structure of the capture carrier 1, such as Figure 1 As shown, according to another embodiment of the present invention, in the recovery component for pyrometallurgical purification of precious metals, when chlorine gas is discharged from the gas cylinder during the purification process of platinum ingots, the capture carrier 1 is a metal mesh, and when the precious metal is platinum ingots, the metal mesh can be a platinum mesh. The platinum mesh has a strong affinity for the volatile precious metal compounds and the decomposed elements, and can perform adsorption and recovery with maximum efficiency.

[0019] The holes in the metal mesh are the first through holes, allowing the gas in the volatiles to pass through. The solid part of the metal mesh is the capturing part. When the volatiles pass through the holes in the metal mesh, the powder (chloride) mixed in the volatiles adheres to the metal mesh for recovery.

[0020] To ensure the stable arrangement of the capture carrier 1 between the gas collecting hood 6 and the crucible 4, as follows: Figure 1 and Figure 2 As shown, according to another embodiment of the present invention, the recovery assembly for pyrometallurgical purification of precious metals includes a fixing part 2 for fixing the capture carrier 1.

[0021] The fixing part 2 includes a bracket 21 and a fixing carrier 22. The fixing carrier 22 is connected to the bracket 21. Two opposing support blocks 23 are connected to the fixing carrier 22. A placement space for the capture carrier 1 is formed above the two support blocks 23. After the capture carrier 1 is placed in the placement space, it is pressed between the two support blocks 23.

[0022] Here, the bracket 21 serves as the main support, and the fixed carrier 22 serves as the connecting structure between the two support blocks 23. The two support blocks 23 cooperate to support the capture carrier 1, so that the capture carrier 1 is stably placed between the gas collection hood 6 and the crucible 4 for recycling.

[0023] Furthermore, after the capture carrier 1 is placed in the placement space, it is attached to the bottom surface of the fixed carrier 22. The fixed carrier 22 has a second permeable hole for the gas in the volatiles to pass through, and the fixed carrier 22 has a cooling structure for cooling it.

[0024] The fixed carrier 22 and the two support blocks 23 cooperate to allow the capturing carrier 1 to be stably placed within the placement space. The design of the second through hole does not obstruct the extraction of gas from the volatiles by the ventilation system. During use, the cooling structure cools the fixed carrier 22. The capturing carrier 1 is attached to the bottom surface of the fixed carrier 22, which can quickly cool the capturing carrier 1, reducing its temperature and enabling it to adsorb dust from the volatiles with greater efficiency. When the capturing carrier 1 is a metal mesh, it can also reduce the corrosion of the metal mesh by the gas.

[0025] The fixed carrier 22 is described below with one specific structure.

[0026] The fixed carrier 22 includes a network of cooling pipes distributed in a network manner and a jacket arranged on the network of cooling pipes, the network of cooling pipes is connected with the support 21, the network of cooling pipes has a water inlet and a water outlet, cooling water enters the network of cooling pipes from the water inlet and is discharged from the water outlet, the capture carrier 1 is attached to the bottom surface of the network of cooling pipes, so that the capture carrier 1 can be cooled and cooled down, the jacket can be used to clamp and fix the air pipe 3 in the noble metal pyrogenic purification device; the network of cooling pipes is connected with each support block 23 through a connecting block, and the support block 23 is rotationally connected with the corresponding connecting block.

[0027] In order to facilitate the capture carrier 1 to be removed from the placement space, the capture carrier 1 is replaced or the powder attached to the capture carrier 1 is collected and then a traditional noble metal purification technology is used to obtain qualified noble metal materials; wherein, the two support blocks 23 are rotated by a certain angle and are both out of contact with the capture carrier 1 placed in the placement space; in this embodiment, tools are used to support the capture carrier 1, then the two support blocks 23 are both rotated by 180 degrees, and the two support blocks 23 are both out of contact with the capture carrier 1, at this time, the capture carrier 1 can be easily removed from the placement space.

[0028] The above-mentioned recycling assembly is applied to the noble metal pyrogenic purification device to be further described below, as shown in Figure 1 and Figure 3 According to another embodiment of the present application, the noble metal pyrogenic purification device comprises the recycling assembly for noble metal pyrogenic purification according to any one of the above-mentioned embodiments.

[0029] The noble metal pyrogenic purification device further comprises the air pipe 3 penetrating through the capture carrier 1 and the fixed carrier 22, the crucible 4 cooperating with the air pipe 3, the air extraction system cooperating with the crucible 4, and the intermediate frequency heating furnace 5 mentioned in the background art and the like, the gas collecting hood 6 in the air extraction system is located above the crucible 4, the crucible 4 is placed in the induction coil 7 connected with the intermediate frequency heating furnace 5, the gas collecting hood 6 has a working position in the vertical direction and a storage position above the working position, and the gas collecting hood 6 is switched between the working position and the storage position through the adjusting assembly 8.

[0030] Among them, the adjusting assembly 8 moves the gas collecting hood 6 from the storage position to the working position, reduces the distance between the gas collecting hood 6 and the crucible 4, improves the efficiency of collecting the gas generated in the volatilization of the crucible 4, and reduces the loss of collection; the adjusting assembly 8 moves the gas collecting hood 6 from the working position to the storage position, so as to increase the distance between the gas collecting hood 6 and the crucible 4, and facilitate the operation of adding noble metal (such as platinum ingot) into the crucible 4 and installing the air pipe 3 and the like.

[0031] Based on the above scheme:

[0032] The adjusting assembly 8 comprises a support frame, an adjusting block 81 and clamping parts, the support frame is vertically provided with a sliding groove 82; the adjusting block 81 is vertically slidably arranged in the sliding groove 82 and is vertically provided with a fixing hole 89 in the adjusting block 81, the adjusting block 81 and the gas collecting hood 6 are connected through an adjusting part; the clamping parts are two and are correspondingly arranged at the top side and the bottom side of the sliding groove 82, each clamping part comprises two clamping jaws 83 arranged oppositely on the inner wall of the top side or the bottom side of the sliding groove 82, the two clamping jaws 83 are connected through an elastic supporting piece 84, each clamping jaw 83 comprises a connecting segment 831 slidably arranged in the horizontal direction, a clamping segment 832 connected with the connecting segment 831 and arranged in the vertical direction, and a guide segment 833 connected with the clamping segment 832 at one end and inclinedly arranged toward the axis direction of the fixing hole 89 at the other end, the connecting segment 831 and the inner wall of the sliding groove 82 are provided with a limiting guide unit limiting the moving distance of the connecting segment 831 in the horizontal direction, and the elastic supporting piece 84 is connected with the clamping segment 832.

[0033] In this embodiment, the adjusting part comprises an adjusting rod 85 connected between the adjusting block 81 and the gas collecting hood 6, and an operating rod 86 connected with the adjusting rod 85 and extending downward.

[0034] When it is needed to move the gas collecting hood 6 to the working position: the operator holds the operating rod 86 to apply a force downward, drives the operating rod 86 to move downward, drives the adjusting block 81 and the gas collecting hood 6 to move downward through the adjusting rod 85, the adjusting block 81 moves downward in the sliding groove 82, the guide segments 833 of the two clamping jaws 83 at the bottom side of the sliding groove 82 penetrate into the fixing hole 89, the adjusting block 81 continues to move downward in the sliding groove 82, the two guide segments 833 move oppositely, drive the two clamping segments 832 to move oppositely, the limiting guide unit guides and limits the movement of the connecting segment 831 to achieve the purpose of guiding and limiting the two clamping segments 832, the elastic supporting piece 84 contracts, until the adjusting block 81 contacts with the two connecting segments 831, at this time, the two clamping segments 832 are tightened in the fixing hole 89 to fix the adjusting block 81, so that the gas collecting hood 6 is moved to the working position and stably kept in the working position.

[0035] When it is needed to move the gas collecting hood 6 to the storage position: the operator holds the operating rod 86 to apply force upward, drives the operating rod 86 to move upward, drives the adjusting block 81 and the gas collecting hood 6 to move upward through the adjusting rod 85, the adjusting block 81 moves upward in the sliding groove 82, until the two clamping claws 83 in the clamping part at the bottom side of the sliding groove 82 are moved out of the fixed through hole 89, the matched elastic supporting piece 84 is stretched to reset, drives the two clamping claws 83 to move away from each other to reset, the limiting and guiding unit guides and limits the movement of the clamping claws 83 to cooperate with the adjusting block 81 next time; the adjusting block 81 continues to move upward in the sliding groove 82, after the two clamping claws 83 at the top side of the sliding groove 82 are inserted into the fixed through hole 89, the two insertion sections 833 of the clamping claws 83 move towards each other, drives the two clamping sections 832 to move towards each other, the limiting and guiding unit guides and limits the movement of the connecting section 831 to guide and limit the two clamping sections 832, the elastic supporting piece 84 is contracted, until the adjusting block 81 contacts with the two connecting sections 831, at this time, the two clamping sections 832 are stretched in the fixed through hole 89 to fix the adjusting block 81, so that the gas collecting hood 6 is stably kept in the storage position after being moved to the storage position.

[0036] Among them, the elastic supporting piece 84 can be two springs connected between the two clamping sections 832.

[0037] The limiting and guiding unit includes a limiting hole 87 opened in the corresponding connecting section 831 in the horizontal direction, and a limiting column 88 fixedly connected with the inner wall of the sliding groove 82 is slidably arranged in the limiting hole 87; through the cooperation of the limiting column 88 and the limiting hole 87, on the one hand, the movement of the clamping claw 83 is more stable, and on the other hand, the movement distance of the clamping claw 83 is limited, before the adjusting block 81 is moved to contact with the connecting section 831 to be stretched and fixed, the two insertion sections 833 need to be first inserted into the fixed through hole 89 to slide against each other, drives the two clamping claws 83 to move towards each other, and the two clamping claws 83 are stretched in the fixed through hole 89 to be fixed.

[0038] It should be noted that the air extraction device can include a suction device and a hose connected between the suction device and the gas collecting hood 6, and the hose facilitates the movement of the gas collecting hood 6 between the working position and the storage position; the support 21 is integrated with the supporting frame.

[0039] After the noble metal pyrogenic purification device is installed:

[0040] The noble metal is placed in the crucible 4, and then the gas collecting hood 6 is moved to the working position;

[0041] The intermediate frequency heating furnace 5 is started and the air extraction device is turned on, the inductive coil 7 connected with the intermediate frequency heating furnace 5 heats the crucible 4, and the noble metal in the crucible 4 is melted into a liquid state;

[0042] The outlet of the air pipe 3 is placed 2-4 cm above the liquid surface in the crucible 4, then the gas cylinder is opened, the reaction gas in the gas cylinder is introduced into the crucible 4, the purification starts, as the reaction continues, the powder in the volatilized matter discharged from the crucible 4 is attached to the capturing carrier 1, the gas in the volatilized matter is collected by the gas collecting cover 6 and then is pumped away. When the reaction is completed, the powder on the capturing carrier 1 is collected, and further purification and refining are carried out.

[0043] When the gas in the gas cylinder is chlorine and the noble metal put into the crucible 4 is platinum ingot, the impurity chlorides, platinum chlorides and decomposed platinum are attached to the capturing carrier 1.

[0044] Finally, it should be pointed out that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A recovery assembly for pyrometallurgical purification of precious metals, arranged between the hood and the crucible of the extraction system, characterized in that, The capturing carrier is provided between the gas collecting hood and the crucible, and has capturing portions on which powders mixed in the volatilized matters discharged from the crucible are attached and first penetrating holes through which gases in the volatilized matters pass.

2. A recovery assembly for pyrometallurgical purification of precious metals according to claim 1, characterized in that, The capturing carrier is a ceramic foam plate.

3. A recovery assembly for pyrometallurgical purification of precious metals according to claim 1, characterized in that, The capturing carrier is a metal mesh.

4. A recovery assembly for pyrometallurgical purification of precious metals according to any one of claims 1 - 3, characterized in that, The capturing carrier is provided with a fixing portion for fixing the capturing carrier.

5. A recovery assembly for pyrometallurgical purification of precious metals according to claim 4, characterized in that, The fixing portion comprises: a support frame; a fixing carrier connected to the support frame, the fixing carrier being provided with two oppositely arranged supporting blocks, a placing space being formed above the two supporting blocks for placing the capturing carrier, and the capturing carrier being pressed between the two supporting blocks after being placed in the placing space.

6. A recovery assembly for pyrometallurgical purification of precious metals according to claim 5, characterized in that, The capturing carrier is attached to the bottom surface of the fixing carrier after being placed in the placing space, the fixing carrier being provided with second penetrating holes through which the gases in the volatilized matters pass and a cooling structure for cooling the capturing carrier.

7. A recovery assembly for pyrometallurgical purification of precious metals according to claim 6, characterized in that, The two supporting blocks are both out of contact with the capturing carrier after being rotated by a certain angle.

8. A precious metal pyrometallurgical purification apparatus comprising a gas collection hood and a crucible, characterized in that, The application further relates to a recovery assembly for precious metal pyrometallurgical purification.

9. A precious metal pyrometallurgical purification device according to claim 8, characterized in that The gas collecting hood has a working position and a storage position above the working position in the vertical direction, and the gas collecting hood is switched between the working position and the storage position by the adjusting assembly.

10. The device for pyrometallurgical purification of noble metals according to claim 9, characterized in that, The adjusting assembly comprises: a support frame provided with a sliding groove in the vertical direction; an adjusting block slidingly arranged in the sliding groove in the vertical direction and provided with a fixing through hole in the vertical direction, the adjusting block being connected to the gas collecting hood through an adjusting portion; two clamping portions corresponding to the top side and the bottom side of the sliding groove, each clamping portion comprising two clamping jaws oppositely arranged on the inner wall of the top side or the bottom side of the sliding groove, the two clamping jaws being connected through an elastic supporting member, each clamping jaw comprising a connecting segment slidingly arranged in the horizontal direction, a clamping segment connected to the connecting segment and arranged in the vertical direction, and a guide-in segment connected to the clamping segment at one end and inclinedly arranged toward the axis direction of the fixing through hole at the other end, a limiting guide unit limiting the moving distance of the connecting segment in the horizontal direction being arranged between the connecting segment and the inner wall of the sliding groove, and the elastic supporting member being connected to the clamping segment.

Images