A saltpeter tank for purifying precious metals

Abstract

The present invention relates to the technical field of precious metal purification, specifically a nitric acid expelling tank for precious metal purification, comprising a supporting mechanism, a heating component arranged in the supporting mechanism, a nitric acid expelling mechanism arranged in the supporting mechanism, and a material adding mechanism arranged in the supporting mechanism; the supporting mechanism is used to provide the nitric acid expelling mechanism with a thrust for squeezing out the solution. By arranging a spliced reaction tank and a top cover, as the nitric acid solution after waste material production is injected along one of the groups of anti-seepage components, the nitric acid solution obtained without sputtering and aggregation can be rapidly decomposed under the continuous hot steaming operation of the heating component, and finally the nitric acid gas and the nitrogen generated by the subsequent addition of the reducing agent can be quickly emptied through the passage formed by the air intake component and the exhaust component, thereby effectively improving the decomposition efficiency of the material during the hot steaming process, while safely storing harmful gases and reducing the secondary interference of nitric acid gas and nitrogen to the precious metal element under high temperature conditions.

Description

Technical Field

[0001] The invention relates to the technical field of precious metal purification, in particular to a saltpeter driving tank for precious metal purification. Background Art

[0002] As the output of smart devices increases year by year, the number of scrapped smart devices also increases year by year. The precious metals in these scrapped smart devices are reusable, so the purification of these materials requires the removal of nitrate. The removal of nitrate is crucial in the purification process of precious metals for the following reasons:

[0003] 1) Avoid metal corrosion: In the process of gold extraction and other precious metal purification by aqua regia, if the nitrate is not removed, the residual nitric acid (or other acidic substances) will continue to corrode the metal or other substances, which will not only lead to metal loss, but also produce unnecessary corrosion products, thereby affecting the purification effect and metal purity.

[0004] 2) Ensure the quality of purification: Nitrate removal can remove residual nitric acid and nitro compounds in the solution, so that there are no nitro compounds in the solution, thereby ensuring the quality of the precious metals after purification.

[0005] The process of removing nitrate from precious metals mainly includes the following steps:

[0006] Dissolution Process: First, the precious metals in gold-containing raw materials (such as scrap electronics, jewelry, and industrial waste) are dissolved using chemical reagents. This step is usually performed using a strong acid such as aqua regia.

[0007] Nitrate removal: During the dissolution process, impurities such as nitrates are produced. The purpose of nitrate removal is to remove these impurities to obtain a purer gold solution. Common nitrate removal methods include evaporation, urea removal, and formic acid removal.

[0008] Among them, when evaporating the nitrate, the nitric acid gas after thermal decomposition diffuses in the sealed tank body. Affected by the thermal evaporation effect, the nitric acid gas will also cause continuous interference to the metal element solution, thereby increasing the steps of metal element purification. Multiple thermal evaporation decomposition and the addition of reducing agents will not only reduce the efficiency of precious metal purification, but also cause pollution to the working environment, making it difficult to produce precious metals in batches from waste materials.

[0009] In view of this, a saltpeter tank for purifying precious metals was designed to solve the above problems. Summary of the Invention

[0010] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0011] To this end, the technical solution adopted in the present invention is:

[0012] A nitrate-eliminating tank for purifying precious metals comprises a supporting mechanism, a heating assembly arranged in the supporting mechanism, a nitrate-eliminating mechanism arranged in the supporting mechanism, and a material adding mechanism arranged in the supporting mechanism; the supporting mechanism is used to provide the nitrate-eliminating mechanism with thrust for extruding a solution and to provide an effective support platform for the nitrate-eliminating mechanism and the material adding mechanism; the heating assembly is used to provide the nitrate-eliminating mechanism with a hot steaming platform for decomposition; the nitrate-eliminating mechanism comprises a reaction tank, two sealing sleeves arranged at the bottom of the reaction tank, an air intake assembly arranged in one of the sealing sleeves, and an exhaust assembly arranged in the other sealing sleeve; a heating base is provided at the bottom of the reaction tank, and a heat-conducting pad is installed inside the heating base; the material adding mechanism comprises a top cover arranged at the top of the reaction tank, which is used to provide an effective exhaust path for nitric acid gas and nitrogen gas.

[0013] In a preferred embodiment, the present invention can be further configured as follows: the material adding mechanism further includes two sets of anti-seepage components arranged in the top cover;

[0014] The anti-seepage component includes an injection pipe, an outer sleeve is provided in the pipe wall at the top of the injection pipe, an inner sleeve is provided in the gap between the outer sleeve and the injection pipe, a tension spring is provided at the top of the inner sleeve, and a flow guide is installed at the bottom of the inner sleeve;

[0015] The top of the injection tube is provided with a disc-shaped end, and the bottom of the injection tube is provided with a spherical cavity;

[0016] The bottom end of the inner sleeve is provided with evenly distributed notches;

[0017] The flow guide also consists of a plug and an extension rod vertical rod.

[0018] In a preferred embodiment, the present invention can be further configured as follows: a locking piece is installed on the inner thread of the end pipe at the top of the top cover, and a drainage component is provided inside the locking piece;

[0019] The drainage assembly includes a drainage pipe, which is in a T-shaped structure as a whole, and a basin opening at the bottom of the drainage pipe is provided with evenly distributed slots, and sub-filters are provided in the slots;

[0020] The bottom end of the drainage pipe is provided with a main filter;

[0021] The top end of the drainage tube is provided with an outer transfer tube, and the outer transfer tube is used to suck out the solution squeezed out by the drainage component.

[0022] In a preferred embodiment of the present invention, the saltpeter driving mechanism may be further configured as follows: the saltpeter driving mechanism further includes an input pipe and an output pipe;

[0023] The input pipe is provided on the air inlet assembly and is used to input the isolation gas;

[0024] The output pipe is arranged on the exhaust assembly and is used for releasing nitric acid gas and nitrogen gas.

[0025] In a preferred embodiment, the present invention can be further configured as follows: a discharge port is provided on one side of the top of the top cover;

[0026] A top seal is provided on one side of the bottom end of the top cover, and the top seal is adapted to fit right above the discharge port.

[0027] In a preferred embodiment, the present invention can be further configured as follows: the air intake assembly includes a first air chamber, a first inner tube is installed at the bottom end of the first air chamber, a first core tube is installed inside the first air chamber, an end head is installed at the top of the first core tube, and a second core tube is installed on the top of the end head;

[0028] A gap for releasing gas is provided between the first core tube and the second core tube;

[0029] A pad for guiding gas transfer is installed at the bottom end of the end head.

[0030] In a preferred example, the present invention can be further configured as follows: the exhaust assembly includes a second air pipe, a second inner pipe is installed at the bottom of the second air pipe, and a third core pipe is installed at the top of the second air pipe.

[0031] In a preferred embodiment, the present invention can be further configured as follows: the supporting mechanism includes a suspension placed on the platform, a protective outer cylinder is movably mounted in the suspension, a clamp is provided at the top of the protective outer cylinder, and two first pads and two second pads are fixedly mounted on the outer wall of the protective outer cylinder in a symmetrical distribution;

[0032] Screw holes are provided inside the two second pads, and a recursive screw is provided in the screw hole of one of the second pads;

[0033] The inner wall of the suspension is provided with two sliding grooves, and two sliding seats are provided in the two sliding grooves;

[0034] A limit rod is installed on the top of the slide seat, and spring steel is arranged on the outside of the limit rod.

[0035] In a preferred embodiment, the present invention can be further configured as follows: a through hole is provided inside the sliding seat;

[0036] The first inner tube and the second inner tube are respectively adapted to penetrate through the through holes inside the two slide seats;

[0037] The top end of the recursive screw is movably installed in one of the slide seats.

[0038] In a preferred embodiment, the present invention can be further configured as follows: the heating component includes a base provided at the bottom of the suspension cavity, a heat-insulating shell is provided inside the base, a heat-dissipating pad is provided in the inner cavity of the heat-insulating shell, and a heating resistance wire is provided on the heat-dissipating pad;

[0039] A power line is connected to the joint of the heating resistance wire, and the power line passes through the outside of the heat-insulating shell.

[0040] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows:

[0041] 1. The present invention provides a spliced reaction tank and a top cover. After the nitric acid solution after the waste material is produced is injected along one of the anti-seepage components, the nitric acid solution without sputtering and aggregation can be quickly decomposed under the continuous hot steaming operation of the heating component. Finally, the nitric acid gas and the nitrogen generated by the subsequent addition of the reducing agent can be quickly exhausted through the passage formed by the air intake component and the exhaust component, thereby effectively improving the decomposition efficiency of the material during the hot steaming process, while safely storing harmful gases and reducing the secondary interference of nitric acid gas and nitrogen on the precious metal element under high temperature conditions.

[0042] 2. The present invention sets a drainage component in the middle of the top cover. After the nitric acid gas and nitrogen are emptied, the aqueous solution and chloride ion solution injected from another set of anti-seepage components can adjust the pH value of the metal element, and the metal element and solution left in the reaction tank will be stratified. As the reaction tank and the top cover are lifted by the sliding seat and the heating base as a whole, the stratified solution can be quickly sucked out by the drainage component, and the remaining metal element can be kept clean and moist, thereby ensuring that the purified metal element is intact and safe.

[0043] 3. The present invention arranges symmetrical air intake components and exhaust components on both sides of the heating base. As the recursive screw rotates clockwise in one of the second pads, the metal element moisture stored at the bottom of the inner cavity of the reaction tank can be compressed toward the bottom of the drainage component. At this time, the residual solution in the metal element can be further squeezed out, thereby ensuring that the solution added each time the metal element is washed can be effectively discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic diagram of the present invention when in use;

[0045] Figure 2 is a schematic diagram of the carrying mechanism of the present invention;

[0046] Figure 3 For the present invention Figure 2 A magnified schematic diagram of point A in the middle;

[0047] Figure 4 For the present invention Figure 2 A partial schematic diagram of

[0048] Figure 5 It is a partial schematic diagram of the present invention;

[0049] Figure 6 is a schematic diagram of a heating component of the present invention;

[0050] Figure 7 A schematic diagram of the material adding mechanism of the present invention;

[0051] Figure 8 Schematic diagram of the drainage component and the anti-seepage component of the present invention;

[0052] Figure 9 For the present invention Figure 8 A magnified schematic diagram of point B in the middle;

[0053] Figure 10 For the present invention Figure 8 The enlarged schematic diagram of point C in the middle;

[0054] Figure 11 It is a schematic diagram of the saltpeter driving mechanism of the present invention;

[0055] Figure 12 Schematic diagram of the air intake assembly and exhaust assembly of the present invention.

[0056] Reference numerals:

[0057] 100, bearing mechanism; 110, suspension; 120, protective outer cylinder; 130, clamp; 140, first pad; 150, second pad; 160, recursive screw; 170, slide; 180, limit rod; 190, spring steel;

[0058] 200, heating component; 210, base; 220, heat insulation shell; 230, heat release pad; 240, heating resistance wire;

[0059] 300, nitrate-driving mechanism; 310, reaction tank; 320, discharge port; 330, sealing sleeve; 340, heating base; 350, backing plate; 360, air inlet assembly; 361, first air chamber; 362, first inner tube; 363, first core tube; 364, end cap; 365, second core tube; 370, input tube; 380, exhaust assembly; 381, second air tube; 382, second inner tube; 383, third core tube; 390, output tube;

[0060] 400, material adding mechanism; 410, top cover; 420, locking piece; 430, drainage assembly; 431, drainage pipe; 432, main filter; 433, sub-filter; 440, transfer outer pipe; 450, top seal; 460, anti-seepage assembly; 461, injection pipe; 462, outer sleeve; 463, inner sleeve; 464, tension spring; 465, guide piece. DETAILED DESCRIPTION

[0061] To make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0062] It is to be understood that these descriptions are illustrative only and are not intended to limit the scope of the invention.

[0063] A nitrate removal tank for purifying precious metals provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0064] Example 1:

[0065] Combine Figures 1-12 As shown, the present invention provides a nitrate-driving tank for purifying precious metals, comprising a supporting mechanism 100, a heating component 200 arranged in the supporting mechanism 100, a nitrate-driving mechanism 300 arranged in the supporting mechanism 100, and a material adding mechanism 400 arranged in the supporting mechanism 100. The supporting mechanism 100 is used to provide a thrust for the nitrate-driving mechanism 300 to extrude the solution, and to provide an effective support platform for the nitrate-driving mechanism 300 and the material adding mechanism 400. The heating component 200 is used to provide a hot steaming platform for decomposition for the nitrate-driving mechanism 300. The nitrate-driving mechanism 300 is used to decompose nitric acid gas and precious metal elements in the nitric acid solution. The material adding mechanism 400 includes a top cover 410 arranged at the top of the reaction tank 310, which is used to provide an effective exhaust path for nitric acid gas and nitrogen.

[0066] The nitrate removal mechanism 300 includes a reaction tank 310, an input pipe 370, an output pipe 390, two sealing sleeves 330 disposed at the bottom of the reaction tank 310, an air intake assembly 360 disposed in one of the sealing sleeves 330, and an exhaust assembly 380 disposed in the other sealing sleeve 330;

[0067] A heating base 340 is provided at the bottom of the reaction tank 310, and a heat-conducting pad 350 is installed inside the heating base 340;

[0068] The input pipe 370 is provided on the air inlet assembly 360 and is used to input the isolation gas;

[0069] The output pipe 390 is provided on the exhaust assembly 380 for releasing nitric acid gas and nitrogen gas;

[0070] The air inlet assembly 360 includes a first air chamber 361 , a first inner tube 362 is mounted at the bottom end of the first air chamber 361 , a first core tube 363 is mounted inside the first air chamber 361 , an end cap 364 is mounted at the top of the first core tube 363 , and a second core tube 365 is mounted at the top of the end cap 364 ;

[0071] A gap for releasing gas is provided between the first core tube 363 and the second core tube 365;

[0072] A pad for guiding gas transfer is installed at the bottom end of the end head 364;

[0073] The exhaust assembly 380 includes a second air pipe 381, a second inner pipe 382 is mounted at the bottom of the second air pipe 381, and a third core pipe 383 is mounted on the top of the second air pipe 381. The air intake assembly 360 includes a first air chamber 361, a first inner pipe 362 is mounted at the bottom of the first air chamber 361, a first core pipe 363 is mounted inside the first air chamber 361, an end cap 364 is mounted on the top of the first core pipe 363, and a second core pipe 365 is mounted on the top of the end cap 364.

[0074] A gap for releasing gas is provided between the first core tube 363 and the second core tube 365;

[0075] A pad for guiding gas transfer is installed at the bottom end of the end head 364;

[0076] The exhaust assembly 380 includes a second air pipe 381 , a second inner pipe 382 is installed at the bottom of the second air pipe 381 , and a third core pipe 383 is installed at the top of the second air pipe 381 .

[0077] The purification of precious metals from scrapped intelligent equipment is carried out through chemical purification. After the nitrate solution is produced, a specific nitrate removal tank is used to decompose the nitric acid gas in the nitrate solution. However, the current nitrate removal operation causes the decomposed nitric acid solution to diffuse on the surface of the precious metal solution. In the high-temperature environment of steam, the diffused nitric acid gas will also cause continuous interference with the precious metal solution.

[0078] When a reducing agent needs to be added to the precious metal solution, the subsequently generated gas will affect the purity of the precious metal solution.

[0079] The device uses an anti-corrosion reaction tank 310 and a top cover 410, and uses a clamp 130 to fix the wall of the drain pipe 431. At this time, the top cover 410 fixed to the outside of the drain pipe 431 by the locking piece 420 can be effectively fixed to the top of the reaction tank 310. At this time, the reaction tank 310 and the top cover 410 that form the closed cavity can provide a safe and efficient preparation environment for the decomposition and subsequent purification of the nitrate solution. As the input pipe 370 inputs the gas from the air intake component 360 into the closed cavity, the barrier gas can drive the nitric acid gas and the subsequently generated gas in the closed cavity into the exhaust component 380, and the driven-in gas can be safely discharged to the outside from the output pipe 390, and the solution in the remaining reaction tank can be continuously thermally decomposed, and the pH can be adjusted by the subsequent addition of aqueous solution and chloride ion solution, which can eventually make the metal element purer.

[0080] Example 2:

[0081] Combine Figure 2 、 Figure 7 and Figure 11 As shown, based on Example 1, the supporting mechanism 100 includes a suspension 110 placed on a platform, a protective outer cylinder 120 is movably installed in the suspension 110, a clamp 130 is provided at the top of the protective outer cylinder 120, and two first pads 140 and two second pads 150 are fixedly installed on the outer wall of the protective outer cylinder 120, which are symmetrically distributed.

[0082] Preferably, the suspension 110 is distributed in a vertical state in the initial state, and the bottom end of the reaction tank 310 is facing downward to provide a stable storage space for the nitrate solution. When the metal element is completely purified and prepared, the bottom end of the suspension 110 can be controlled to flip upward until the separated reaction tank 310 and the top cover 410 are flipped downward, which can ultimately improve the rapid release of the metal element.

[0083] Screw holes are provided inside the two second pads 150 , and a recursive screw 160 is provided in the screw hole of one of the second pads 150 ;

[0084] Two sliding grooves are formed on the inner wall of the suspension 110, and two sliding seats 170 are arranged in the two sliding grooves;

[0085] A limit rod 180 is installed on the top of the slide 170, and a spring steel 190 is provided on the outside of the limit rod 180;

[0086] A through hole is provided inside the slide 170;

[0087] The first inner tube 362 and the second inner tube 382 are respectively adapted to penetrate through the through holes inside the two slide seats 170;

[0088] The top end of the recursive screw 160 is movably mounted in one of the slide seats 170 .

[0089] Preferably, by adjusting the recursive screw 160 to rotate clockwise, the recursive screw 160 will push the crane to have a slide 170. As the slide 170 rises steadily, the two slides 170 can finally cooperate with the heating base 340 to lift the reaction tank 310 steadily. At this time, the metal element after decomposition and purification can be squeezed by the drainage component 430 to precipitate excess solution. By using multiple extrusions, the metal element can be made purer.

[0090] Example 3:

[0091] Combine Figure 6 、 Figure 7 and Figure 11 As shown, based on Example 1, the heating component 200 includes a base 210 arranged at the bottom of the inner cavity of the suspension 110, an insulating shell 220 is arranged inside the base 210, a heat release pad 230 is arranged in the inner cavity of the insulating shell 220, and a heating resistor 240 is arranged on the heat release pad 230;

[0092] A power line is connected to the connector of the heating resistor 240 , and the power line passes through the outside of the heat-insulating housing 220 .

[0093] Preferably, when the power line in the heating resistor wire 240 is energized, the heating resistor wire 240 continuously releases heat energy and radiates upward from the heat release pad 230. At this time, the radiated heat energy will be transferred to the top seal 450 and the drainage component 430, and will eventually heat the reaction tank 310. At this time, the nitrate solution stored in the inner cavity of the reaction tank 310 can be accelerated to decompose under the continuous air supply operation of the air intake component 360.

[0094] Example 4:

[0095] Combine Figure 6 and Figure 7 As shown, based on Example 1, a locking piece 420 is installed on the internal thread of the end pipe at the top of the top cover 410, and a drainage component 430 is provided inside the locking piece 420;

[0096] The drainage assembly 430 includes a drainage pipe 431. The drainage pipe 431 is generally T-shaped. The bottom of the drainage pipe 431 is provided with evenly spaced slots, and the slots are provided with sub-filters 433.

[0097] A main filter 432 is provided at the bottom end of the drain pipe 431 .

[0098] Preferably, according to the adaptation requirements of the drain pipe 431 to the bottom of the inner cavity of the reaction tank 310, the fixed height of the drain pipe 431 inside the clamp 130 needs to be set in advance, so that in the initial state, the bottom end of the drain pipe 431 is located in the inner cavity of the top cover 410. At this time, after the main filter 432 and multiple sub-filters 433 arranged at the bottom end of the drain pipe 431 are pressed into the interior of the metal element, the squeezed solution can be precipitated along the multiple sub-filters 433 and one main filter 432, and finally effectively discharged outward in conjunction with the transferred outer tube 440.

[0099] The top of the drainage tube 431 is provided with an outer transfer tube 440, and the outer transfer tube 440 is used to suck out the solution squeezed out by the drainage component 430;

[0100] A discharge port 320 is provided on one side of the top of the top cover 410;

[0101] A top seal 450 is provided on one side of the bottom end of the top cover 410 , and the top seal 450 is adapted to fit right above the discharge port 320 .

[0102] Preferably, the locking piece 420 is used to control the height of the top cover 410 outside the drain pipe 431. When the bottom end of the top cover 410 is fitted and pressed against the top end of the reaction tank 310, the locking piece 420 can be locked. At this time, the closed cavity formed by the reaction tank 310 and the top cover 410 can provide an effective exhaust path for nitric acid gas and nitrogen, and finally cooperate with the continuous air supply and surging of the input pipe 370 and the air intake assembly 360 to accelerate the efficiency of gas and elemental decomposition.

[0103] Example 5:

[0104] Combine Figure 6 and Figure 7 As shown, in the above embodiment, the material adding mechanism 400 further includes two sets of anti-seepage components 460 disposed in the top cover 410;

[0105] The anti-seepage assembly 460 includes an injection tube 461. An outer sleeve 462 is provided in the tube wall at the top of the injection tube 461. An inner sleeve 463 is provided in the gap between the outer sleeve 462 and the injection tube 461. A tension spring 464 is provided at the top of the inner sleeve 463. A flow guide 465 is installed at the bottom of the inner sleeve 463.

[0106] The top of the injection tube 461 is provided with a disc-shaped end, and the bottom of the injection tube 461 is provided with a spherical cavity;

[0107] The bottom end of the inner sleeve 463 is provided with evenly distributed notches;

[0108] The flow guide 465 also consists of a plug and an extension rod vertical rod.

[0109] Preferably, there are two injection tubes 461, one of which is used to provide an injection channel for nitric acid solution, and the other is used to provide an injection channel for aqueous solution and chloride ion solution. As the solution exerts downward pressure on the guide member 465, and as the top of the guide member 465 moves into the spherical cavity at the bottom of the injection tube 461, the solution can eventually be smoothly input into the inner cavity of the reaction tank 310 and the top cover 410. After losing pressure, the guide member 465 can be pulled upward by the inner sleeve 463 and the tension spring 464, thereby ensuring that the inner cavity of the reaction tank 310 and the top cover 410 is completely closed.

[0110] The working principle and use process of the present invention are as follows: the current nitrate removal step in precious metal refining mainly involves thermal decomposition of nitrates. When nitrates are decomposed at high temperature, the generated metal oxides and nitric acid gas can be separated in a nitrate removal tank. The nitric acid gas is affected by the heat vaporization in the nitrate removal tank and floats to the upper layer of the solution. However, incompletely decomposed nitrates still exist in the solution after heat treatment, so it is necessary to use a reducing agent, sulfite milk, to reduce the residual nitrates until the metal element and nitrogen are separated. However, the pH value and ionic strength of the solution will change during this process. At the same time, the nitric acid gas and nitrogen will also cause secondary interference to the metal element due to the thermal vaporization effect on the reaction environment.

[0111] The device is composed of an assembled reaction tank 310 and a top cover 410, and two symmetrically distributed sealing sleeves 330 are installed at the bottom of the reaction tank 310. At this time, the air inlet component 360 is installed in one of the sealing sleeves 330, and the exhaust component 380 is installed in the other sealing sleeve 330. As the material to be refined is added from the top of one of the injection pipes 461, the material will be poured into the inner cavity of the outer sleeve 462, and the material will push the guide member 465 downward under the pressure of the material until the top of the guide member 465 moves to the spherical cavity at the bottom of the injection pipe 461. At this time, the material can be transferred to the top cover 410 along the spherical cavity. Finally, the material can flow into the bottom of the inner cavity of the reaction tank 310 along the rod of the guide member 465 without splashing, until the material is immersed in the outside of the air inlet component 360 and the exhaust component 380.

[0112] After the isolation gas is input through the input pipe 370, the isolated airflow can enter from the first inner tube 362 and be output outward through the first gas chamber 361 and the first core tube 363, and finally enter the gap between the first core tube 363 and the second core tube 365 through the end 364. At this time, the isolated airflow can agitate the material solution, and the decomposition efficiency of the material in the hot steaming state will be accelerated, and it will be convenient for the rapid reaction after the subsequent addition of the reducing agent. At the same time, the isolated airflow is released from the solution and enters the cavity of the reaction tank 310 and the top cover 410. The nitric acid gas and nitrogen driven by the isolated airflow can be output from the end at the top of the third core tube 383. At this time, the nitric acid gas and nitrogen can be safely released outward along the second air pipe 381, the second inner tube 382 and the output pipe 390.

[0113] After the nitric acid and nitrogen gases in the material are completely evacuated through heat evaporation and sufficient treatment with the reducing agent, the remaining metal element can be retained at the bottom of the inner cavity of the reaction tank 310. During the treatment process, the light water solution and the chloride ion solution need to be injected from another injection pipe 461. Following the working method of the solution input of the above-mentioned anti-seepage component 460, the water solution and the chloride ion solution can finally be safely dripped into the metal element through another guide member 465, ultimately ensuring that the pH value of the metal element remains constant during the final purification period.

[0114] The finally purified metal element can flow out along the inner wall of the reaction tank 310 and the discharge port 320 through the overall side flipping of the protective outer cylinder 120. At this time, it is necessary to screw the locking piece 420 until the top cover 410 and the reaction tank 310 are separated. At this time, the flowing metal element can be released smoothly.

[0115] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A nitrate removal tank for precious metal purification, comprising a supporting mechanism (100), characterized in that: It also includes a heating component (200) disposed in the carrier mechanism (100), a saltpeter-driving mechanism (300) disposed in the carrier mechanism (100), and a material-adding mechanism (400) disposed in the carrier mechanism (100); The bearing mechanism (100) is used to provide a thrust for the nitrate-expelling mechanism (300) to extrude the solution, and to provide an effective supporting platform for the nitrate-expelling mechanism (300) and the material-adding mechanism (400); The heating component (200) is used to provide a hot steaming platform for decomposition of the nitrate-driving mechanism (300); The nitrate-driving mechanism (300) comprises a reaction tank (310), two sealing sleeves (330) arranged at the bottom of the reaction tank (310), an air intake assembly (360) arranged in one of the sealing sleeves (330), and an exhaust assembly (380) arranged in the other sealing sleeve (330); A heating base (340) is provided at the bottom of the reaction tank (310), and a heat-conducting pad (350) is installed inside the heating base (340); The material adding mechanism (400) includes a top cover (410) disposed on the top of the reaction tank (310) and used to provide an effective exhaust path for nitric acid gas and nitrogen gas; The material adding mechanism (400) further includes two sets of anti-seepage components (460) disposed within the top cover (410); The anti-seepage component (460) includes an injection tube (461), an outer sleeve (462) is provided in the tube wall at the top end of the injection tube (461), an inner sleeve (463) is provided in the gap between the outer sleeve (462) and the injection tube (461), a tension spring (464) is provided at the top end of the inner sleeve (463), and a flow guide (465) is installed at the bottom end of the inner sleeve (463); The top of the injection tube (461) is provided with a disc-shaped end, and the bottom of the injection tube (461) is provided with a spherical cavity; The bottom end of the inner sleeve (463) is provided with evenly distributed notches; The guide member (465) is also composed of a plug and an extension rod vertical rod.

2. The saltpeter removal tank for precious metal purification according to claim 1, characterized in that: A locking piece (420) is installed through the internal thread of the end pipe at the top of the top cover (410), and a drainage component (430) is provided inside the locking piece (420); The drainage assembly (430) comprises a drainage pipe (431), the drainage pipe (431) being of a T-shaped structure as a whole, and a basin opening at the bottom end of the drainage pipe (431) being provided with evenly distributed slots, wherein sub-filter discs (433) are provided in the slots; A main filter (432) is provided at the bottom end of the drainage pipe (431); The top end of the drainage tube (431) is provided with an outer transfer tube (440), and the outer transfer tube (440) is used to suck out the solution squeezed out by the drainage component (430).

3. The saltpeter removal tank for precious metal purification according to claim 1, characterized in that: The saltpeter driving mechanism (300) further includes an input pipe (370) and an output pipe (390); The input pipe (370) is provided on the air intake assembly (360) and is used to input the isolation gas; The output pipe (390) is provided on the exhaust assembly (380) and is used to release nitric acid gas and nitrogen gas.

4. The saltpeter removal tank for precious metal purification according to claim 1, characterized in that: A discharge port (320) is provided on one side of the top end of the top cover (410); A top seal (450) is provided on one side of the bottom end of the top cover (410), and the top seal (450) is adapted to fit directly above the discharge port (320).

5. The saltpeter removal tank for precious metal purification according to claim 1, characterized in that: The air intake assembly (360) comprises a first air chamber (361), a first inner tube (362) is installed at the bottom end of the first air chamber (361), a first core tube (363) is installed inside the first air chamber (361), an end head (364) is installed at the top of the first core tube (363), and a second core tube (365) is installed at the top of the end head (364); A gap for releasing gas is provided between the first core tube (363) and the second core tube (365); A pad for guiding gas transfer is installed at the bottom end of the end head (364).

6. The saltpeter removal tank for precious metal purification according to claim 1, characterized in that: The exhaust assembly (380) comprises a second air pipe (381), a second inner pipe (382) is installed at the bottom of the second air pipe (381), and a third core pipe (383) is installed at the top of the second air pipe (381).

7. The saltpeter removal tank for precious metal purification according to claim 1, characterized in that: The bearing mechanism (100) comprises a suspension (110) placed on a platform, a protective outer cylinder (120) is movably mounted in the suspension (110), a clamp (130) is provided at the top end of the protective outer cylinder (120), and two first pads (140) and two second pads (150) are fixedly mounted on the outer wall of the protective outer cylinder (120) and are symmetrically distributed. Screw holes are provided inside the two second pads (150), and a recursive screw rod (160) is provided in the screw hole of one of the second pads (150); Two sliding grooves are provided on the inner wall of the suspension (110), and two sliding seats (170) are provided in the two sliding grooves; A limiting rod (180) is installed on the top of the slide seat (170), and the outside of the limiting rod (180) is provided with spring steel (190).

8. The saltpeter removal tank for precious metal purification according to claim 5, characterized in that: A through hole is provided inside the sliding seat (170); The first inner tube (362) and the second inner tube (382) are respectively adapted to penetrate through holes inside the two slide seats (170); The top end of the recursive screw (160) is movably mounted in one of the slide seats (170).

9. The saltpeter removal tank for precious metal purification according to claim 1, characterized in that: The heating component (200) comprises a base (210) arranged at the bottom of the inner cavity of the suspension (110); a heat-insulating shell (220) is arranged inside the base (210); a heat-releasing pad (230) is arranged in the inner cavity of the heat-releasing shell (220); and a heating resistance wire (240) is arranged on the heat-releasing pad (230); A power line is connected to the connector of the heating resistance wire (240), and the power line passes through the outside of the heat-insulating housing (220).

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