Ventilation pipe for pyrogenic purification of noble metal and device thereof

Abstract

The utility model discloses a breather pipe and a device for pyrogenic purification of noble metals, which comprise a breather pipe body and a diffusion nozzle, the discharge end of the diffusion nozzle sprays materials in a manner of diffusing towards the periphery, and the diffusion nozzle is connected to the exhaust end of the breather pipe body; compared with the prior art, the gas introduced by the breather pipe body is sprayed in a manner of diffusing towards the periphery through the diffusion nozzle, so that when the breather pipe is applied to a noble metal pyrogenic purification device, the contact area between the gas and the molten noble metal in a liquid state is greatly increased, the gas-liquid reaction interface is increased, and the reaction rate is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to precious metal purification technical field, concretely relates to a kind of venturi pipe and its device for precious metal pyrogenic purification. BACKGROUND

[0002] The existing platinum alloy pyrogenic purification mode is to place platinum ingot in a crucible, open the medium-frequency heating furnace and the air extraction device, the induction coil of the medium-frequency heating furnace acts on the crucible, the temperature in the crucible is as high as 1800 DEG C, to melt the platinum ingot into liquid state;Then open the chlorine steel cylinder, the chlorine gas in the chlorine steel cylinder is guided to the platinum liquid surface in the crucible through the chlorine pipe, to carry out purification work.

[0003] But because the inner diameter of chlorine pipe is small, generally 6-9mm, it leads to that the area of venturi pipe in the crucible is small in contact with precious metal liquid surface, in addition, the temperature in the crucibble is as high as 1800 DEG C, due to thermal buoyancy effect, gas is not diffused in time, and reaction efficiency is low. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a kind of venturi pipe and its device for precious metal pyrogenic purification, to solve the problem in prior art, due to the structure design of chlorine pipe and under the thermal buoyancy effect, gas guided into the crucible by chlorine pipe is not diffused in time, and reaction efficiency is low.

[0005] To achieve the above-mentioned purpose, the utility model first aspect has adopted the following technical scheme: a kind of venturi pipe for precious metal pyrogenic purification, including venturi pipe body, still including its discharge end with the way of diffusion to the periphery Diffusion nozzle for spraying material, the diffusion nozzle is connected on the exhaust end of venturi pipe body.

[0006] The utility model second aspect has adopted the following technical scheme: a kind of precious metal pyrogenic purification device, including the venturi pipe for precious metal pyrogenic purification described in the utility model first aspect.

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

[0008] The venturi pipe for precious metal pyrogenic purification includes venturi pipe body and diffusion nozzle connected therewith, the gas guided by venturi pipe is sprayed with the way of diffusion to the periphery by diffusion nozzle, when it is applied to precious metal pyrogenic purification device, the contact area of gas and precious metal in liquid state after melting is greatly increased, thereby increasing the interface of gas-liquid reaction, and improving reaction rate. BRIEF DESCRIPTION OF DRAWINGS

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

[0010] Figure 2 For Figure 1 A local enlarged view of the middle A part;

[0011] Figure 3 For Figure 1 A schematic view of the arrangement of the adjusting block in the sliding groove.

[0012] The reference signs in the attached drawings of the specification include: air pipe body 1, diffusion nozzle 2, flow guide injection channel 21, detachable connecting assembly 3, first connecting ring 31, second connecting ring 32, connecting rod 33, locking cap 34, annular limiting step 4, crucible 5, intermediate frequency heating furnace 6, induction coil 7, gas collecting cover 8, adjusting assembly 9, supporting frame 91, adjusting block 92, sliding groove 93, mounting groove 94, clamping block 95, guide inclined surface 96, elastic supporting piece 97, limiting hole 98, limiting column 99, adjusting rod 910, operating rod 911. DETAILED DESCRIPTION

[0013] The utility model will be further explained in detail through specific embodiments as follows:

[0014] As Figure 2 shown, the utility model discloses a kind of air pipes for noble metal pyrogenic purification, including air pipe body 1 and its discharge end with the way of diffusion to four around material spraying diffusion nozzle 2, the diffusion nozzle 2 is connected on the exhaust end of air pipe body 1.

[0015] The air pipe for noble metal pyrogenic purification includes air pipe body 1 and diffusion nozzle 2 connected with it, and the gas introduced by air pipe body 1 is sprayed with the way of diffusion to four around by diffusion nozzle 2, so when it is applied to noble metal pyrogenic purification device, the contact area of gas and noble metal in liquid state after melting is greatly increased, so as to increase the interface of gas-liquid reaction and improve the reaction rate.

[0016] In the embodiment, the diffusion nozzle 2 is a ceramic nozzle, which can withstand a certain high temperature. The diffusion nozzle 2 and the air pipe body 1 can be fixedly connected into a whole by bonding or other methods.

[0017] Further optimize the structure of diffusion nozzle 2, as Figure 2 shown, according to another embodiment of the utility model, the air pipe for noble metal pyrogenic purification, wherein the flow guide injection channel 21 in the diffusion nozzle 2 gradually decreases from the caliber of its feeding end to the caliber of its discharge end, and then gradually increases, and the caliber of its feeding end is larger than the caliber of its discharge end.

[0018] The structure of the flow guide injection channel 21 in the diffusion nozzle 2 can make the gas quickly sprayed from the diffusion nozzle 2 and diffused in all directions.

[0019] In order to conveniently connect or separate the ventilation pipe body 1 and the diffusion nozzle 2, the ventilation pipe body 1 and the diffusion nozzle 2 can also be connected in the following manner. Figure 2 As shown in the drawings, according to another embodiment of the utility model, a ventilation pipe for noble metal pyrometallurgy, wherein the diffusion nozzle 2 and the ventilation pipe body 1 are detachably connected through a detachable connecting assembly 3.

[0020] In the utility model, the detachable connecting assembly 3 comprises a first connecting ring 31, a second connecting ring 32 and a connecting part, the first connecting ring 31 is fixedly sleeved on the outer wall of the diffusion nozzle 2, the second connecting ring 32 is fixedly sleeved on the outer wall of the ventilation pipe body 1, and the connecting part is at least one and detachably connected between the first connecting ring 31 and the second connecting ring 32.

[0021] In the embodiment, the number of the connecting part is two and symmetrically distributed on the outer side of the diffusion nozzle 2, the first connecting ring 31 and the second connecting ring 32 are correspondingly connected on the diffusion nozzle 2 and the ventilation pipe body 1 to serve as the connecting support points of the connecting part, so that the diffusion nozzle 2 and the ventilation pipe body 1 can be detachably connected.

[0022] Based on the above scheme:

[0023] Each connecting part comprises a connecting rod 33, one end of the connecting rod 33 is rotationally connected with the first connecting ring 31 and the other end thereof is freely threaded through a connecting hole formed in the second connecting ring 32 and then screwed with a locking cap 34.

[0024] When the diffusion nozzle 2 and the ventilation pipe body 1 are connected, the exhaust end of the ventilation pipe body 1 is embedded in the diffusion nozzle 2, the free end of the connecting rod 33 is correspondingly threaded through the connecting hole and then screwed with the locking cap 34, the locking cap 34 is connected with the second connecting ring 32 to complete the connection between the diffusion nozzle 2 and the ventilation pipe body 1.

[0025] When the diffusion nozzle 2 and the ventilation pipe body 1 are separated, the locking cap 34 is first rotated to be disconnected from the corresponding connecting rod 33, then the diffusion nozzle 2 is moved away from the ventilation pipe body 1, the connecting rod 33 is withdrawn from the corresponding connecting hole, and the exhaust end of the ventilation pipe body 1 is withdrawn from the diffusion nozzle 2 to complete the separation between the diffusion nozzle 2 and the ventilation pipe body 1.

[0026] In order to further improve the stability of the diffusion nozzle 2 and the ventilation pipe body 1 after being connected, the inner wall of the feeding end of the flow guide injection channel 21 in the diffusion nozzle 2 is recessed to the outside to form an annular limiting step 4, and the exhaust end of the ventilation pipe body 1 is embedded in the diffusion nozzle 2 and abuts against the annular limiting step 4.

[0027] The above ventilation pipe will be applied to the noble metal fire refining device to further illustrate, as shown in Figure 1 、 Figure 2 and Figure 3 According to another embodiment of the present application, the noble metal fire refining device comprises the ventilation pipe for noble metal fire refining according to any one of the above embodiments.

[0028] The noble metal fire refining device further comprises a crucible 5 cooperating with the ventilation pipe, an air extraction device cooperating with the crucible 5, and the intermediate frequency heating furnace 6 mentioned in the background art, and the like structure, the air extraction device comprises a gas collecting cover 8 located above the crucible 5, the crucible 5 is arranged in the induction coil 7 connected with the intermediate frequency heating furnace 6, the gas collecting cover 8 has a working position and a storage position above the working position in the vertical direction, and the gas collecting cover 8 is converted between the working position and the storage position through the adjusting assembly 9.

[0029] In the present embodiment, the air extraction device generates suction force, the gas collecting cover 8 in the air extraction device collects the gas generated in the crucible 5 and removes it through the air extraction device. Among them, the adjusting assembly 9 moves the gas collecting cover 8 from the storage position to the working position, reduces the distance between the gas collecting cover 8 and the crucible 5, improves the efficiency of collecting the gas generated in the crucible 5, and reduces the loss of collection; the adjusting assembly 9 moves the gas collecting cover 8 from the working position to the storage position, to increase the distance between the gas collecting cover 8 and the crucible 5, facilitate the operation of adding noble metal (such as platinum ingot) into the crucible 5 and installing the ventilation pipe, etc.

[0030] Based on the above scheme:

[0031] The adjusting assembly 9 comprises a support frame 91, an adjusting block 92 and clamping portions, the support frame 91 is vertically provided with a sliding groove 93, the adjusting block 92 is vertically slidably arranged in the sliding groove 93 and connected with the fume hood 8 through an adjusting portion; the clamping portions are two and correspondingly arranged at the top side and the bottom side of the sliding groove 93, each clamping portion comprises two clamping structures oppositely arranged on the inner wall of the top side or the bottom side of the sliding groove 93, each clamping structure comprises a mounting groove 94 formed on the inner wall of the top side or the bottom side of the sliding groove 93 and a clamping block 95 slidably arranged in the mounting groove 94 at one end, the other end of the clamping block 95 is arranged in the sliding groove 93 and formed with a guide inclined surface 96, a resilient supporting piece 97 is connected between the clamping block 95 and the inner wall of the mounting groove 94, and a limiting guide unit limiting the moving distance of the clamping block 95 into or out of the mounting groove 94 is further arranged between the clamping block 95 and the inner wall of the mounting groove 94.

[0032] In the embodiment, the adjusting portion comprises an adjusting rod 910 connected between the adjusting block 92 and the fume hood 8 and an operating rod 911 connected with the adjusting rod 910 and extending downward.

[0033] When it is needed to move the fume hood 8 to the working position, the operator holds the operating rod 911 to apply a force downward, drives the operating rod 911 to move downward, drives the adjusting block 92 and the fume hood 8 to move downward through the adjusting rod 910, drives the adjusting block 92 to move downward in the sliding groove 93, until the adjusting block 92 moves to the guide inclined surfaces 96 of the two clamping blocks 95 in the clamping portion at the bottom side of the sliding groove 93, the adjusting block 92 continues to move downward, the adjusting block 92 drives the two clamping blocks 95 to move away from each other, the resilient supporting piece 97 contracts, the limiting guide unit guides and limits the movement of the clamping block 95, when the adjusting block 92 completely moves to the bottom end of the sliding groove 93 and is clamped in the two clamping blocks 95, the two clamping blocks 95 fix the adjusting block 92, so that the fume hood 8 is moved to the working position and stably kept in the working position.

[0034] When it is needed to move the gas hood 8 to the storage position: the operator holds the operating rod 911 to apply force upward, drives the operating rod 911 to move upward, drives the adjusting block 92 and the gas hood 8 to move upward through the adjusting rod 910, the adjusting block 92 moves upward in the sliding groove 93, the adjusting block 92 is separated from the two clamping blocks 95 between the clamping part at the bottom side of the sliding groove 93, the matched elastic supporting piece 97 is stretched to reset, drives the two clamping blocks 95 to move towards each other to reset, the limiting and guiding unit guides and limits the movement of the clamping blocks 95 for the next time cooperating with the adjusting block 92; the adjusting block 92 moves upward in the sliding groove 93 to the guiding inclined surface 96 of the two clamping blocks 95 in the clamping part at the top side of the sliding groove 93, the adjusting block 92 continues to move upward, the adjusting block 92 drives the two clamping blocks 95 to move away from each other, the elastic supporting piece 97 is contracted, the limiting and guiding unit guides and limits the movement of the clamping blocks 95, when the adjusting block 92 is completely moved to the top end of the sliding groove 93 and clamped in the two clamping blocks 95, the two clamping blocks 95 fix the adjusting block 92, so that the gas hood 8 is moved to the storage position and stably kept in the storage position.

[0035] Preferably, the elastic supporting piece 97 is a spring.

[0036] The limiting and guiding unit comprises a limiting hole 98 opened along the length direction of the corresponding clamping block 95, and a limiting column 99 fixedly connected with the inner wall of the corresponding mounting groove 94 is slidably arranged in the limiting hole 98; through the cooperation of the limiting column 99 and the limiting hole 98, on the one hand, the movement of the clamping block 95 is more stable, and on the other hand, the movement distance of the clamping block 95 is limited; before the adjusting block 92 is moved between the two clamping blocks 95 to be clamped and fixed, the adjusting block 92 first slides against the guiding inclined surface 96 of the two clamping blocks 95, drives the two clamping blocks 95 to move away from each other, and then the adjusting block 92 slides between the two clamping blocks 95 to be clamped and fixed.

[0037] It should be noted that the air extraction device can comprise a suction device and a hose connected between the suction device and the gas hood 8, and the hose facilitates the movement of the gas hood 8 between the working position and the storage position; the air pipe can be matched with a fixing structure, such as a fixing clamp, during installation.

[0038] After the noble metal pyrogenic purification device is installed:

[0039] The noble metal is placed in the crucible 5, and then the gas hood 8 is moved to the working position;

[0040] The intermediate frequency heating furnace 6 is started, and the air extraction device is turned on, the inductive coil 7 connected with the intermediate frequency heating furnace 6 heats the crucible 5, and the noble metal in the crucible 5 is melted into a liquid state;

[0041] The diffusing nozzle 2 of the air pipe is placed 4 cm above the liquid surface in the crucible 5, then the gas cylinder is opened, the reaction gas in the gas cylinder is introduced into the crucible 5, the reaction gas is sprayed in a peripheral diffusion mode, the purification starts, until the noble metal is purified to be qualified, the operation is stopped.

[0042] Compared with the structure in the background art, the gas-liquid contact surface is increased by about 200%, and the purification time is reduced by about 70%.

[0043] 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 technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A snorkel for pyrometallurgical refining of precious metals, comprising a snorkel body, characterized in that The diffusing nozzle is connected to the exhaust end of the snorkel body.

2. A snorkel for the fire refining of precious metals according to claim 1, characterised in that, The diffusing nozzle is a ceramic nozzle.

3. A snorkel for the fire refining of precious metals according to claim 1, characterised in that, The flow guide injection channel in the diffusing nozzle gradually decreases in diameter from the inlet end to the outlet end and then gradually increases in diameter from the outlet end to the inlet end, and the diameter of the inlet end is greater than that of the outlet end.

4. A snorkel for the fire refining of precious metals according to claim 1, characterized in that, The diffusing nozzle is detachably connected to the snorkel body through a detachable connecting assembly.

5. A snorkel for the fire refining of precious metals according to claim 4, characterised in that, The detachable connecting assembly comprises: a first connecting ring fixedly sleeved on the outer wall of the diffusing nozzle; a second connecting ring fixedly sleeved on the outer wall of the snorkel body; a connecting part, which is at least one and detachably connected between the first connecting ring and the second connecting ring.

6. A snorkel for the fire refining of precious metals according to claim 5, characterised in that, Each connecting part comprises: a connecting rod, one end of which is rotationally connected to the first connecting ring and the other end of which is freely threaded through a connecting hole formed in the second connecting ring and then screwed with a locking cap.

7. A snorkel for the fire refining of precious metals according to claim 4, characterised in that, The inner wall of the inlet end of the flow guide injection channel in the diffusing nozzle is recessed outward to form an annular limiting step, and the exhaust end of the snorkel body is embedded in the diffusing nozzle and abuts against the annular limiting step.

8. A precious metal pyrometallurgical purification apparatus, characterized in that The application relates to a snorkel for pyrometallurgical purification of precious metals.

9. The device for pyrometallurgical purification of noble metals according to claim 8, further comprising a crucible cooperating with the gas duct and an air extraction device cooperating with the crucible, said air extraction device comprising a gas hood located above the crucible, characterized in that, The gas collecting cover has a working position and a storage position in the vertical direction, and the gas collecting cover is switched between the working position and the storage position through an 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, which is vertically provided with a sliding groove; an adjusting block, which is vertically slidably arranged in the sliding groove and connected to the gas collecting cover through an adjusting part; two clamping parts, which are correspondingly arranged on the top side and the bottom side of the sliding groove, each clamping part comprises two clamping structures arranged oppositely on the inner wall of the top side or the bottom side of the sliding groove, each clamping structure comprises a mounting groove formed in the inner wall of the top side or the bottom side of the sliding groove and a clamping block slidably arranged in one end of the mounting groove, the other end of the clamping block is arranged in the sliding groove and forms a guide inclined surface, an elastic support is connected between the clamping block and the inner wall of the mounting groove, and a limiting guide unit limiting the moving distance of the clamping block in or out of the mounting groove is further arranged between the clamping block and the inner wall of the mounting groove.

Images