Nitrate removing tank for precious metal purification

Abstract

The invention relates to the technical field of precious metal purification, in particular to a nitrate removing tank for precious metal purification, which comprises a bearing mechanism, a heat supply assembly arranged in the bearing mechanism, a nitrate removing mechanism arranged in the bearing mechanism and a material adding mechanism arranged in the bearing mechanism, and the bearing mechanism is used for providing thrust for extruding the solution for the saltpeter driving mechanism. By arranging the reaction tank and the top cover which are spliced, after a nitric acid solution prepared from waste materials is injected along one anti-seepage assembly, the obtained nitric acid solution without sputtering convergence can be rapidly decomposed under the continuous thermal evaporation operation of the heat supply assembly; and finally, nitric acid gas and nitrogen generated by subsequently adding a reducing agent can be quickly emptied through a passage formed by the gas inlet assembly and the gas exhaust assembly, so that the decomposition efficiency in the material thermal evaporation process is effectively improved, and meanwhile, harmful gas is safely stored. And secondary interference of the nitric acid gas and the nitrogen gas on the noble metal elementary substance in a high-temperature state is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of precious metal purification, in particular to a nitrate-dripping 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 in the process of precious metal purification is crucial for the following reasons: 1) Avoid metal corrosion: In the process of extracting precious metals such as gold 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, thus affecting the purification effect and the purity of the metal.

[0003] 2) Ensure the quality of purification: Nitrate removal can remove residual nitric acid and nitro compounds in the solution, so that there is no nitro compound in the solution, thus ensuring the quality of the precious metals after purification.

[0004] The process of removing nitrate from precious metals mainly includes the following steps: ‌Dissolution process‌: First, the precious metals in gold-containing raw materials (such as scrap electronic products, jewelry and industrial waste) are dissolved out by chemical reagents. This step is usually done using strong acids such as aqua regia.

[0005] ‌Nitrates removal operation‌: During the dissolution process, impurities such as nitrates will be produced. The purpose of nitrate removal is to remove these impurities to obtain a purer gold-containing solution. Commonly used nitrate removal methods include evaporation, urea, formic acid, etc.

[0006] 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 cause continuous interference to the metal element solution, which will increase the steps of metal element purification. The multiple thermal evaporation decomposition and the addition of reducing agent will not only reduce the efficiency of precious metal purification, but also pollute the working environment, making it difficult to produce precious metals in batches from waste.

[0007] In view of this, a saltpeter tank for purifying precious metals was designed to solve the above problems. Summary of the invention

[0008] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0009] To this end, the technical solution adopted in the present invention is: A nitrate-dripping tank for purifying precious metals comprises a bearing mechanism, a heating component arranged in the bearing mechanism, a nitrate-dripping mechanism arranged in the bearing mechanism, and a material adding mechanism arranged in the bearing mechanism; the bearing mechanism is used to provide a thrust for the nitrate-dripping mechanism to extrude a solution, and to provide an effective supporting platform for the nitrate-dripping mechanism and the material adding mechanism; the heating component is used to provide a hot steaming platform for decomposition for the nitrate-dripping mechanism; the nitrate-dripping mechanism comprises a reaction tank, two sealing sleeves arranged at the bottom of the reaction tank, an air intake component arranged in one of the sealing sleeves, and an exhaust component arranged in the other sealing sleeve; a heating base is arranged 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.

[0010] In a preferred example, 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; The anti-seepage component comprises an injection pipe, an outer sleeve is arranged in the pipe wall at the top of the injection pipe, an inner sleeve is arranged in the gap between the outer sleeve and the injection pipe, a tension spring is arranged at the top of the inner sleeve, and a flow guide is installed at the bottom of the inner sleeve; The top of the injection pipe is provided with a disc-shaped end head, and the bottom of the injection pipe is provided with a spherical cavity; The bottom end of the inner sleeve is provided with evenly distributed notches; The flow guide also consists of a plug and an extension rod vertical rod.

[0011] In a preferred example, 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 arranged inside the locking piece; The drainage assembly includes a drainage pipe, which is in a T-shaped structure as a whole, and the bottom of the drainage pipe is provided with evenly distributed slots, and the slots are provided with sub-filters; A main filter is provided at the bottom end of the liquid discharge pipe; The top end of the liquid discharge pipe is provided with an outer transfer tube, and the outer transfer tube is used to suck out the solution squeezed out by the liquid discharge component.

[0012] In a preferred example, the present invention can be further configured as follows: the saltpeter-dripping mechanism further includes an input pipe and an output pipe; The input pipe is arranged on the air intake assembly and is used to input the isolation gas; The output pipe is arranged on the exhaust assembly and is used for releasing nitric acid gas and nitrogen gas.

[0013] In a preferred example, the present invention can be further configured as follows: a discharge port is provided on one side of the top of the top cover; A top seal is provided on one side of the bottom end of the top cover, and the top seal is adapted to fit just above the discharge port.

[0014] In a preferred example, 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, a terminal is installed at the top of the first core tube, and the first core tube is installed at the top of the terminal; A gap for releasing gas is provided between the first core tube and the second core tube; A cushion block for guiding gas transfer is installed at the bottom end of the end head.

[0015] 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.

[0016] In a preferred example, the present invention can be further configured as follows: the bearing mechanism includes a suspension placed on the platform, a protective outer cylinder is movably installed in the suspension, a clamp is provided on the top of the protective outer cylinder, and two first pads and two second pads are fixedly installed on the outer wall of the protective outer cylinder, which are symmetrically distributed; The two second pads are provided with screw holes inside, and a recursive screw is provided in the screw hole of one of the second pads; The inner wall of the suspension is provided with two slide grooves, and two slide seats are arranged in the two slide grooves; A limit rod is installed on the top of the slide seat, and spring steel is arranged on the outside of the limit rod.

[0017] In a preferred example, the present invention can be further configured as follows: a through hole is provided inside the slide seat; The first inner tube and the second inner tube are respectively adapted to penetrate through the through holes inside the two slide seats; The top end of the recursive screw is movably mounted in one of the slide seats.

[0018] In a preferred example, the present invention can be further configured as follows: the heating component includes a base arranged at the bottom of the inner cavity of the suspension, a heat-insulating shell is arranged inside the base, a heat-dissipating pad is arranged in the inner cavity of the heat-insulating shell, and a heating resistance wire is arranged on the heat-dissipating pad; A power line is connected to the joint of the heating resistance wire, and the power line runs through the outside of the heat-insulating shell.

[0019] By adopting the above technical solution, the beneficial effects achieved by the present invention are: 1. The present invention sets a spliced ​​reaction tank and a top cover. After the nitric acid solution after the waste material is prepared 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 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.

[0020] 2. The present invention arranges 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 group of anti-seepage components can adjust the pH value of the metal element, and the metal element and solution subsequently remaining in the reaction tank will be stratified. After 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.

[0021] 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

[0022] Figure 1 It is a schematic diagram of the present invention when used; Figure 2 is a schematic diagram of the carrying mechanism of the present invention; Figure 3 For the present invention Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 For the present invention Figure 2 A partial schematic diagram of Figure 5 It is a partial schematic diagram of the present invention; Figure 6 is a schematic diagram of a heating component of the present invention; Figure 7 It is a schematic diagram of the material adding mechanism of the present invention; Figure 8 Schematic diagram of the drainage component and the anti-seepage component of the present invention; Fig. 9 For the present invention Figure 8 The enlarged schematic diagram of point B in the middle; Fig.10 For the present invention Figure 8 The enlarged schematic diagram of the center C; Fig.11 It is a schematic diagram of the nitrate-driving mechanism of the present invention; Fig.12 Schematic diagram of the air intake assembly and the exhaust assembly of the present invention.

[0023] Reference numerals: 100, bearing mechanism; 110, suspension; 120, protective outer cylinder; 130, clamp; 140, first pad; 150, second pad; 160, recursive screw; 170, slide seat; 180, limit rod; 190, spring steel; 200, heating component; 210, base; 220, heat-insulating shell; 230, heat-dissipating pad; 240, heating resistance wire; 300, driving mechanism; 310, reaction tank; 320, discharge port; 330, sealing sleeve; 340, heating base; 350, pad; 360, air inlet assembly; 361, first air chamber; 362, first inner tube; 363, first core tube; 364, end; 365, first core tube; 370, input tube; 380, exhaust assembly; 381, second air tube; 382, ​​second inner tube; 383, third core tube; 390, output tube; 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

[0024] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0025] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0026] 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.

[0027] Embodiment 1: Combination Figure 1-Figure 12As shown, a nitrate-dripping tank for purifying precious metals provided by the present invention comprises a supporting mechanism 100, a heating component 200 arranged in the supporting mechanism 100, a nitrate-dripping 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-dripping mechanism 300 to extrude the solution, and to provide an effective supporting platform for the nitrate-dripping 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-dripping mechanism 300. The nitrate-dripping mechanism 300 is used to decompose nitric acid gas and precious metal elements in nitric acid solution. The material adding mechanism 400 comprises 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.

[0028] The nitrate-driving mechanism 300 includes a reaction tank 310, an input pipe 370 and an output pipe 390, 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 input pipe 370 is disposed on the air inlet assembly 360 and is used to input the isolation gas; The output pipe 390 is disposed on the exhaust assembly 380 and is used to release nitric acid gas and nitrogen gas; The air intake assembly 360 includes a first air chamber 361, a first inner tube 362 is installed at the bottom of the first air chamber 361, a first core tube 363 is installed inside the first air chamber 361, a terminal 364 is installed at the top of the first core tube 363, and a first core tube 365 is installed at the top of the terminal 364; A gap for releasing gas is provided between the first core tube 363 and the first core tube 365; A pad for guiding gas transfer is installed at the bottom end of the end 364; 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. The air intake assembly 360 includes a first air chamber 361, a first inner pipe 362 is installed at the bottom of the first air chamber 361, a first core pipe 363 is installed inside the first air chamber 361, a terminal 364 is installed at the top of the first core pipe 363, and a first core pipe 365 is installed at the top of the terminal 364; A gap for releasing gas is provided between the first core tube 363 and the first core tube 365; A pad for guiding gas transfer is installed at the bottom end of the end 364; 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 .

[0029] The purification of precious metals from waste materials in scrapped intelligent equipment is carried out by chemical purification. After the nitrate solution is prepared, a specific nitrate removal tank is needed to decompose the nitric acid gas in the nitrate solution. However, the current nitrate removal operation will cause the decomposed nitric acid solution to diffuse on the surface of the precious metal solution. In the high temperature environment of hot steam, the diffused nitric acid gas will also cause continuous interference to the precious metal solution. 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.

[0030] 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 on 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. After 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 in the closed cavity and the subsequently generated gas into the exhaust component 380, and the driven gas can be safely discharged to the outside from the output pipe 390, and the solution remaining in the reaction tank can be continuously decomposed by thermal evaporation. Combined with the subsequent addition of aqueous solution and chloride ion solution to adjust the pH, the metal element can eventually be made purer.

[0031] Embodiment 2: Combination Figure 2 , Figure 7 and Fig.11 As shown, on the basis of 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 on 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.

[0032] Preferably, the suspension 110 is distributed in a vertical state in the initial state, and the bottom end of the reaction tank 310 is 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.

[0033] 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 ; Two slide grooves are formed on the inner wall of the suspension 110, and two slide seats 170 are disposed in the two slide grooves; A limit rod 180 is installed on the top of the slide seat 170, and a spring steel 190 is arranged on the outside of the limit rod 180; A through hole is provided inside the slide seat 170; 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; The top end of the recursive screw rod 160 is movably mounted in one of the slide seats 170 .

[0034] 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 eventually cooperate with the heating base 340 to lift the reaction tank 310 steadily. At this time, the decomposed and purified metal element can be squeezed by the drainage component 430 to precipitate excess solution. By using multiple squeezing, the metal element can be made purer.

[0035] Embodiment 3: Combination Figure 6 , Figure 7 and Fig.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; A power line is connected to the joint of the heating resistance wire 240 , and the power line passes through the outside of the heat insulation shell 220 .

[0036] Preferably, when the power line in the heating resistor 240 is energized, the heating resistor 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.

[0037] Embodiment 4: Combination Figure 6 and Figure 7 As shown, based on Example 1, a locking piece 420 is installed on the inner thread of the end pipe at the top of the top cover 410, and a drainage component 430 is arranged inside the locking piece 420; The drainage assembly 430 includes a drainage pipe 431, which is in a T-shaped structure as a whole, and a basin opening at the bottom of the drainage pipe 431 is provided with evenly distributed slots, and a sub-filter 433 is arranged in the slots; A main filter 432 is disposed at the bottom end of the drain pipe 431 .

[0038] Preferably, according to the adaptation requirement 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 of the drain pipe 431 are pressed into the interior of the metal element, the squeezed solution can precipitate along the multiple sub-filters 433 and one main filter 432, and finally cooperate with the transfer outer tube 440 to be effectively discharged to the outside.

[0039] The top of the liquid discharge tube 431 is provided with a transfer outer tube 440, and the transfer outer tube 440 is used to suck out the solution squeezed out by the liquid discharge component 430; A discharge port 320 is provided on one side of the top of the top cover 410; A top seal 450 is disposed 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 .

[0040] 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 gas, 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. Embodiment 5: Combination 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; The anti-seepage component 460 includes an injection tube 461, an outer sleeve 462 is arranged in the tube wall at the top of the injection tube 461, an inner sleeve 463 is arranged in the gap between the outer sleeve 462 and the injection tube 461, a tension spring 464 is arranged at the top of the inner sleeve 463, and a flow guide 465 is installed at the bottom 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 flow guide 465 also consists of a plug and an extension rod vertical rod.

[0041] 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 to 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, and the guide member 465 after losing pressure 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.

[0042] The working principle and use process of the present invention: the current nitrate removal step in precious metal refining is mainly nitrate thermal decomposition. When nitrate is decomposed at high temperature, the generated metal oxides and nitric acid gas can be separated in the nitrate removal tank, and the nitric acid gas will float to the upper layer of the solution under the influence of thermal evaporation in the nitrate removal tank, and there are still incompletely decomposed nitrates in the solution after heat treatment, so it is necessary to use a reducing agent sulfite milk to reduce the residual nitrate until the metal element and nitrogen are separated, but the pH value and ionic strength in the solution will change during this process, and the nitric acid gas and nitrogen will also cause secondary interference to the metal element due to the thermal evaporation effect on the reaction environment; The device is composed of a reaction tank 310 and a top cover 410 of an assembled structure, and two symmetrically distributed sealing sleeves 330 are installed at the bottom of the reaction tank 310. At this time, the air intake component 360 is installed in one of the sealing sleeves 330, and the exhaust component 380 is installed in the other sealing sleeve 330. After the material to be refined is added from the top of one of the injection tubes 461, the material will be poured into the inner cavity of the outer sleeve 462, and the guide member 465 will be pushed downward by the material squeeze until the top of the guide member 465 moves to the spherical cavity at the bottom of the injection tube 461. At this time, the material can be transferred to the top cover 410 along the spherical cavity, and 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 intake component 360 and the exhaust component 380. After the isolation gas is inputted through the input pipe 370, the airflow with isolation can enter from the first inner tube 362 and be outputted 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 first core tube 365 through the end 364. At this time, the isolation airflow can agitate the material solution, and the decomposition efficiency of the material in the hot steam 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 isolation 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 isolation airflow can be outputted 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. After the nitric acid gas and nitrogen in the material are completely emptied under the heat steam and the reducing agent treatment, 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 mode 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 along another guide member 465, and finally ensure that the pH value of the metal element is kept constant during the final purification period. The purified metal element can finally 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, the locking piece 420 needs to be screwed in until the top cover 410 and the reaction tank 310 are separated, and the metal element that flows out can be released smoothly.

[0043] 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 present invention, and that the scope of the present 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 carrying mechanism (100), a saltpeter-dripping mechanism (300) disposed in the carrying mechanism (100), and a material-adding mechanism (400) disposed in the carrying mechanism (100); The bearing mechanism (100) is used to provide a thrust for the nitrate-driving mechanism (300) to extrude the solution, and to provide an effective supporting platform for the nitrate-driving mechanism (300) and the material-adding mechanism (400); The heating component (200) is used to provide a hot steam platform for decomposing the nitrate-dripping 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) comprises a top cover (410) arranged at the top of the reaction tank (310) and used to provide an effective exhaust path for nitric acid gas and nitrogen gas.

2. The nitrate removal tank for precious metal purification according to claim 1, characterized in that: The material adding mechanism (400) further comprises two sets of anti-seepage components (460) arranged in the top cover (410); The anti-seepage component (460) comprises an injection tube (461), an outer sleeve (462) is arranged in the tube wall at the top end of the injection tube (461), an inner sleeve (463) is arranged in the gap between the outer sleeve (462) and the injection tube (461), a tension spring (464) is arranged 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 head, 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 flow guide (465) is also composed of a plug and an extension rod vertical rod.

3. The nitrate removal tank for precious metal purification according to claim 1, characterized in that: A locking piece (420) is installed in the inner thread of the end pipe at the top of the top cover (410), and a drainage component (430) is arranged inside the locking piece (420); The drainage assembly (430) comprises a drainage pipe (431), the drainage pipe (431) being in 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, and sub-filters (433) being arranged in the slots; A main filter (432) is provided at the bottom end of the liquid discharge pipe (431); The top end of the liquid discharge 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 liquid discharge component (430).

4. The nitrate 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 arranged on the air intake assembly (360) and is used to input the isolation gas; The output pipe (390) is arranged on the exhaust assembly (380) and is used to release nitric acid gas and nitrogen gas.

5. The nitrate 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).

6. The nitrate 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 first 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 cushion block for guiding gas transfer is installed at the bottom end of the end head (364).

7. The nitrate 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).

8. The nitrate 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) being movably mounted in the suspension (110), a clamp (130) being arranged at the top end of the protective outer cylinder (120), and two first pads (140) and two second pads (150) being symmetrically distributed and fixedly mounted on the outer wall of the protective outer cylinder (120); 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); The inner wall of the suspension (110) is provided with two slide grooves, and two slide seats (170) are arranged in the two slide grooves; A limit rod (180) is installed on the top of the sliding seat (170), and spring steel (190) is arranged on the outside of the limit rod (180).

9. The nitrate removal tank for precious metal purification according to claim 6, 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 rod (160) is movably mounted in one of the slide seats (170).

10. The nitrate 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-dissipating pad (230) is arranged in the inner cavity of the heat-insulating shell (220); and a heating resistance wire (240) is arranged on the heat-dissipating pad (230); A power line is connected to the joint of the heating resistance wire (240), and the power line passes through the outside of the heat-insulating housing (220).

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