Production method of high-purity potassium aurous cyanide

Abstract

The invention relates to a production method of high-purity potassium aurous cyanide, which comprises the steps of gold pretreatment, electrochemical reaction, cooling crystallization and washing and drying, the washing is realized based on the following washing equipment, the washing equipment comprises a washing tank, and the washing tank is provided with a first water inlet pipe; the mixing mechanism comprises a mixing pipe which is rotationally installed, the mixing pipe is in transmission connection to the output shaft end of a driving motor in a gear meshing transmission mode, and the driving motor is connected with a gear through a corresponding one-way bearing; the mixing pipe is of a hollow tubular structure, the backflushing mechanism comprises a second water inlet pipe communicated with the mixing pipe through a corresponding rotary joint, and the mixing piece is of a hollow tubular structure or a hollow plate-shaped structure and is communicated with the mixing pipe; the tail end of the lower side of the mixing part is arranged in a necking shape and is bent towards the same direction to be connected with corresponding nozzles, and the bending direction of the nozzles is opposite to the rotation direction of the mixing pipe driven by the driving motor; and a suction filtration mechanism. On the basis of ensuring the washing quality, the washing frequency is reduced, the washing efficiency is improved, and the vacuum filtration efficiency is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical production, and in particular to a method for producing high-purity potassium aurous cyanide. Background Art

[0002] Potassium gold cyanide is an inorganic compound, mainly used for electroplating of electronic products, as well as analytical reagents, pharmaceutical industry, etc. At present, the main production methods of potassium gold cyanide are gold fulminate method, gold cyanide method, oxygen cyanidation method, controlled potential direct synthesis method and diaphragm electrolysis method. Potassium gold cyanide is usually prepared by adding potassium hydroxide, pure water, gold and dissolved potassium cyanide into an electrolytic cell for reaction. After the reaction, crude potassium gold cyanide is obtained by cooling, crystallizing and vacuum filtration. However, because there are many impurities attached to the surface of crude potassium gold cyanide crystals, it cannot be ensured to be used in the electronic electroplating process. Only by repeatedly adding pure water to the obtained crude potassium gold cyanide for washing, and then cooling and crystallizing to obtain the potassium gold cyanide product can it be ensured to be used in the electronic electroplating process.

[0003] The existing preparation method must be washed repeatedly until the pH of the washing water reaches between 8 and 10 to remove impurities attached to the surface of potassium cyanogen gold crystals. The existing washing tank has a poor washing effect. During washing and filtration after washing, potassium cyanogen gold crystals are easily stuck and blocked on the filter membrane, which not only affects the filtration efficiency, but also is not conducive to the sticky potassium cyanogen gold crystals being fully contacted and washed with pure water. The washing efficiency is stagnant, which is very troublesome, and the number of washing times needs to be increased, wasting water resources.

[0004] Therefore, the research purpose of the present invention is to design a production method of high-purity potassium gold cyanide that reduces the number of washing times, improves washing efficiency, and further improves vacuum filtration efficiency while ensuring washing quality. Summary of the invention

[0005] In view of the technical problems existing in the above-mentioned prior art, the present invention provides a method for producing high-purity potassium cyanide gold, which can effectively solve the technical problems existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is:

[0007] A method for producing high-purity potassium cyanogenide comprises the following specific steps:

[0008] S1, gold pretreatment: the gold ingot is pressed into thin gold sheets by a high-energy sheet press, and cut into small pieces by a shearing machine, and then the surface oil is washed away by ultrasonic waves, and finally washed with dilute nitric acid and blown dry;

[0009] S2, electrochemical reaction: the gold flakes prepared in S1 are placed in a titanium basket and placed in an electrolytic cell, with the gold flakes as the anode, graphite or stainless steel as the cathode, potassium cyanide solution as the anode liquid, potassium hydroxide as the cathode liquid, and the cathode and the anode separated by a high-energy resin membrane and powered on for electrochemical reaction;

[0010] S3, concentration, cooling and crystallization: the electrolyte after the reaction is cooled, crystallized and vacuum filtered to obtain crude potassium cyanide gold crystals, and the obtained concentrated slurry is discharged into the electrolytic cell for further use, and the condensed water after use is discharged and used in step S2 to dissolve potassium cyanide to prepare potassium cyanide solution;

[0011] S4, washing and drying: the crude potassium cyanogen gold product obtained in step S3 is sequentially dissolved, cooled and crystallized, washed with pure water, vacuum filtered and dried to obtain a high-purity potassium cyanogen gold product; wherein the washing is implemented based on the following washing equipment, the washing equipment comprises a washing tank, a corresponding cover is fixedly installed on the upper part of the washing tank, a feed pipe is arranged on the cover, and the top side wall and the bottom of the washing tank are respectively provided with a corresponding first water inlet pipe and a discharge pipe;

[0012] The mixing mechanism comprises a mixing tube rotatably mounted on the lower side of the cover, a plurality of corresponding mixing elements are fixedly mounted on the mixing tube, and the mixing tube is driven by a corresponding driving motor; the mixing tube is connected to the output shaft end of the driving motor by a gear meshing transmission mode, and the driving motor and the gear are connected by a corresponding one-way bearing;

[0013] The recoil mechanism, the mixing tube is a hollow tubular structure, the recoil mechanism comprises a second water inlet pipe connected to the mixing tube through a corresponding rotating joint, the mixing element is a hollow tubular structure or a hollow plate structure and is connected to the mixing tube, the lower end of the mixing element is a constricted shape and is bent in the same direction and connected to corresponding nozzles, and the bending direction of the nozzle is opposite to the rotation direction of the mixing tube driven by the driving motor;

[0014] The filtration mechanism comprises an interlayer arranged at the bottom of the washing tank, a filtration container connected to the interlayer through a corresponding pipeline and a vacuum pump, and an ultrafiltration membrane is arranged on the side of the interlayer facing the washing tank.

[0015] In step S2, the electrolysis current is 150-200A, the electrolysis voltage is 6-10V, and the electrolysis temperature is 70-80°C; and the waste gas generated by the electrolytic cell reaction and the ammonia and hydrogen cyanide generated by the dissolution of potassium cyanide are discharged into the alkaline washing tower for treatment.

[0016] The cooling crystallization temperature of step S3 and step S4 is 5-10°C, the water washing temperature is 25-35°C, the water washing endpoint PH is 8-10, the drying temperature is 60-100°C, and the drying time for one batch is 9-10h; the tail liquid obtained in step S1, step S3 and step S4 is collected in the tail liquid recovery tank and then enters the electrolytic recovery machine to extract gold.

[0017] A corresponding liquid inlet valve is fixedly installed on the first water inlet pipe, a corresponding water inlet valve is installed on the second water inlet pipe, and a corresponding liquid outlet valve is installed on the pipeline connecting the suction filtration container and the washing tank. The liquid inlet valve, water inlet valve, liquid outlet valve and drive motor are all electrically connected to the control system; the first water inlet pipe and the second water inlet pipe are both connected to an external water source, and the external water source is installed with a corresponding chiller and thermometer.

[0018] The mixing elements are arranged in a circular array, and the nozzles connected to the bending parts at the ends of the mixing elements are arranged in an up-and-down staggered manner.

[0019] The mixing element and the mixing tube are fixedly connected and installed with corresponding connecting tubes, and the connecting tubes on the same mixing element are arranged at intervals up and down.

[0020] A corresponding pH meter is installed on the pipeline connecting the suction filtration container and the interlayer.

[0021] The bottom side of the cover is fixedly connected downwardly with a corresponding mounting tube at a position corresponding to the mixing tube, and the mixing tube is rotatably sleeved on the mounting tube through a corresponding bearing; the bottom of the washing tank is fixedly connected upwardly with a corresponding bearing seat at a position corresponding to the mixing tube, and the mixing tube is rotatably mounted on the bearing seat, and the lower part of the bearing seat is supported and mounted in the washing tank by a plurality of spaced first legs.

[0022] The washing tank is supported and installed by the corresponding second supporting legs, the feed pipe is provided with a corresponding closing cover which can be opened and closed, and the discharge pipe is provided with a corresponding discharge valve which is fixedly installed.

[0023] The inner side of the interlayer is provided with a corresponding installation guide groove. Through the cooperation of the guide groove and the slider, the ultrafiltration membrane is detachably installed on the front side of the interlayer and is sealed and locked by a corresponding sealing ring and a screw rod.

[0024] Advantages of the present invention:

[0025] 1) The present invention uses gold blocks cleaned of oil and diluted nitric acid as anodes, graphite or stainless steel as cathodes, potassium cyanide solution as anode liquid, potassium hydroxide as cathode liquid, and the cathode and anode are separated by a high-energy resin membrane for electrochemical reaction and cooling and crystallization to obtain crude potassium cyanogen gold. The crude potassium cyanogen gold is washed and dried to obtain a high-purity potassium cyanogen gold product. During washing, a mixing mechanism and a recoil mechanism are combined and arranged. Under the premise of no excessive driving mechanism intervention, a rotary joint and a one-way bearing are added to ensure the compactness of the equipment. The driving motor can be used to drive the mixing tube to rotate forward for mixing and washing, and the mixing tube can be driven to rotate reversely for flushing under the flushing pressure of the water flow, thereby improving the efficiency of washing vacuum filtration.

[0026] 2) The present invention is provided with a recoil mechanism on the basis of the mixing mechanism, and the mixing mechanism composed of the mixing tube and the mixing element is driven by the driving motor to rotate so as to fully mix and wash the potassium cyanogen gold and pure water, so that the impurities on the surface of the potassium cyanogen gold are fully dissolved in the water. The top of the mixing tube is connected to the second water inlet pipe through a rotating joint, the mixing tube and the mixing element are both arranged as a hollow structure and connected, and the lower end of the mixing element is arranged in a constricted shape and is bent in the same direction and connected to be installed with a corresponding nozzle, and the bending direction of the nozzle is opposite to the rotation direction of the driving motor driving the mixing tube. When the washing tank completes the mixing and washing and stops, the second water inlet pipe is used to inlet water, and water is sprayed from the nozzle to the washing tank through the mixing tube and the mixing element. The impact force of the water flow drives the mixing tube to realize the self-rotation water spraying flushing, so that the attached crystals are separated from the ultrafiltration membrane, which not only effectively avoids the crystals from blocking the filter holes and ensures the normal filtration, but also promotes the sticky crystals to be dissolved in the pure water to be fully washed, thereby improving the efficiency and quality of washing.

[0027] 3) The present invention uses a direction opposite to the mixing rotation direction of the mixing tube to flush. In the absence of other driving mechanisms, the recoil of water is used to drive the recoil mechanism to rotate and flush the surface of the ultrafiltration membrane, effectively preventing materials or impurities from sticking to the ultrafiltration membrane and affecting vacuum filtration, making the filtration process smoother and improving the filtration effect. Furthermore, the one-way bearing is used to install the output shaft of the gear and the drive motor, which can not only ensure the active driving of the mixing tube by the drive motor, but also ensure the normal rotation of the recoil mechanism when the recoil mechanism is pushed back under the pressure of the water jet, thereby improving the practical performance of the present invention.

[0028] 4) The mixing element of the present invention is arranged in a circular array, and the lower end portion is arranged in a constricted shape and is bent in the same direction to be connected and installed with corresponding nozzles. The bending direction of the nozzle is opposite to the rotation direction of the mixing tube driven by the driving motor, and the nozzles connected to the bent portion at the end are staggered up and down. The same direction arrangement can ensure that the mixing element can form self-rotation under the impact pressure of the water flow sprayed by the nozzle to flush the material on the surface of the ultrafiltration membrane, and the reverse setting and the cooperation of the one-way bearing can effectively avoid the interference of the driving motor and ensure the normal operation of the reverse rotation; furthermore, the staggered arrangement of the nozzles up and down can ensure that the flushing surface covers the entire ultrafiltration membrane, improving the comprehensiveness and efficiency of the flushing.

[0029] 5) The present invention installs a corresponding water inlet valve on the second water inlet pipe, installs a corresponding liquid outlet valve on the pipeline connecting the suction filtration container and the washing tank, and the liquid inlet valve, water inlet valve, liquid outlet valve and driving motor are electrically connected to the control system. The pH value of the suction filtrate is measured by the pH meter on the pipeline to determine the washing condition, and then the opening and closing of the liquid inlet valve is controlled to control the number and duration of washing. After the washing stops, backwashing is performed first and then suction filtration is performed to automatically and accurately determine the washing quality and reduce the workload of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The present invention discloses a process flow chart for producing high-purity potassium aurous cyanide.

[0031] Figure 2 It is a structural schematic diagram of the present invention.

[0032] Figure 3 for Figure 3 Schematic cross-sectional view of the middle washing tank.

[0033] Figure 4 It is a structural diagram of the recoil mechanism.

[0034] In the accompanying drawings: washing tank 1, sealing cover 2, feed pipe 3, first water inlet pipe 4, discharge pipe 5, mixing tube 6, mixing element 7, drive motor 8, one-way bearing 9, second water inlet pipe 10, nozzle 11, vacuum pump 12, interlayer 13, filtration container 14, ultrafiltration membrane 15, rotary joint 16, discharge valve 17, connecting pipe 18, pH meter 19, mounting pipe 20, first support leg 22, second support leg 23, closing cover 24, liquid inlet valve 25, bearing seat 26. DETAILED DESCRIPTION

[0035] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments in conjunction with the accompanying drawings:

[0036] refer to Figure 1-3 , a method for producing high-purity potassium cyanogenide, comprising the following specific steps:

[0037] S1, gold pretreatment: the gold ingot is pressed into thin gold sheets by a high-energy sheet press, and cut into small pieces by a shearing machine, and then the surface oil is washed away by ultrasonic cleaning, and finally washed with dilute nitric acid and blown dry;

[0038] S2, electrochemical reaction: the gold flakes prepared in S1 are placed in a titanium basket and placed in an electrolytic cell, with the gold flakes as the anode, graphite or stainless steel as the cathode, potassium cyanide solution as the anode liquid, potassium hydroxide as the cathode liquid, and the cathode and the anode separated by a high-energy resin membrane and powered on for electrochemical reaction;

[0039] S3, concentration, cooling and crystallization: the electrolyte after the reaction is cooled, crystallized and vacuum filtered to obtain crude potassium cyanide gold crystals, and the obtained concentrated slurry is discharged into the electrolytic cell for further use, and the condensed water after use is discharged and used in step S2 to dissolve potassium cyanide to prepare potassium cyanide solution;

[0040] S4, washing and drying: the crude potassium cyanogen gold product obtained in step S3 is sequentially dissolved, cooled and crystallized, washed with pure water, vacuum filtered and dried to obtain a high-purity potassium cyanogen gold product; wherein the washing is implemented based on the following washing equipment, the washing equipment comprises a washing tank 1, a corresponding cover 2 is fixedly installed on the upper part of the washing tank, a feed pipe 3 is arranged on the cover 2, and the top side wall and the bottom of the washing tank 1 are respectively provided with a corresponding first water inlet pipe 4 and a discharge pipe 5;

[0041] The mixing mechanism comprises a mixing tube 6 rotatably mounted on the lower side of the cover 2, a plurality of corresponding mixing elements 7 are fixedly mounted on the mixing tube 6, and the mixing tube 6 is driven by a corresponding driving motor 8; the mixing tube 6 is connected to the output shaft end of the driving motor 8 by a gear meshing transmission mode, and the driving motor 8 is connected to the gear by a corresponding one-way bearing 9;

[0042] The recoil mechanism, the mixing tube 6 is a hollow tubular structure, the recoil mechanism comprises a second water inlet pipe 10 connected to the mixing tube 6 through a corresponding rotary joint 16, the mixing element 7 is a hollow tubular structure or a hollow plate structure and is connected to the mixing tube 6, the lower end of the mixing element 7 is a constricted shape and is bent in the same direction and connected to the corresponding nozzle 11, the bending direction of the nozzle 11 is opposite to the rotation direction of the mixing tube 6 driven by the driving motor 8;

[0043] The filtration mechanism comprises an interlayer 13 arranged at the bottom of the washing tank 1, a filtration container 14 connected to the interlayer 13 through a corresponding pipeline and a vacuum pump 12, and an ultrafiltration membrane 15 is arranged on the side of the interlayer 13 facing the washing tank 1.

[0044] The present invention uses gold blocks cleaned of oil and diluted nitric acid as anodes, graphite or stainless steel as cathodes, potassium cyanide solution as anode liquid, potassium hydroxide as cathode liquid, and the cathode and anode are separated by a high-energy resin membrane for electrochemical reaction and cooling and crystallization to obtain crude potassium cyanogen gold. The crude potassium cyanogen gold is washed and dried to obtain a high-purity potassium cyanogen gold product. During washing, a mixing mechanism and a recoil mechanism are combined and arranged. Under the premise of no excessive involvement of driving mechanisms, a rotary joint 16 and a one-way bearing 9 are added to ensure the compactness of the equipment. The driving motor 8 can be used to drive the mixing tube 6 to rotate forward for mixing and washing, and the mixing tube 6 can be driven to rotate reversely for flushing under the flushing pressure of the water flow, thereby improving the efficiency of washing vacuum filtration.

[0045] The present invention is provided with a recoil mechanism on the basis of a mixing mechanism, and the mixing mechanism composed of a mixing tube 6 and a mixing element 7 is driven by a driving motor 8 to rotate so as to fully mix and wash potassium cyanogen gold and pure water, so that impurities on the surface of potassium cyanogen gold are fully dissolved in water. The top of the mixing tube 6 is connected to the second water inlet pipe 10 through a rotating joint 16, and the mixing tube 6 and the mixing element 7 are both arranged as hollow structures and connected, and the lower end of the mixing element 7 is arranged in a constricted shape and is bent in the same direction and connected to corresponding nozzles 11, and the bending direction of the nozzle 11 is opposite to the rotation direction of the mixing tube 6 driven by the driving motor 8. When the washing tank 1 completes the mixed washing and stops, water is introduced through the second water inlet pipe 10, and water is sprayed from the nozzle 11 to the washing tank 1 through the mixing tube 6 and the mixing element 7. The impact force of the water flow drives the mixing tube 6 to realize self-rotation water spraying and flushing, so that the attached crystals are separated from the ultrafiltration membrane 15, which not only effectively avoids the crystals from clogging the filter holes and ensures the normal filtration, but also promotes the sticky crystals to be dissolved in the pure water to be fully washed, thereby improving the efficiency and quality of washing.

[0046] In step S2, the electrolysis current is 150-200A, the electrolysis voltage is 6-10V, and the electrolysis temperature is 70-80°C; and the waste gas generated by the electrolytic cell reaction and the ammonia and hydrogen cyanide generated by the dissolution of potassium cyanide are discharged into the alkaline washing tower for treatment.

[0047] The cooling crystallization temperature of step S3 and step S4 is 5-10°C, the water washing temperature is 25-35°C, the water washing endpoint PH is 8-10, the drying temperature is 60-100°C, and the drying time for one batch is 9-10h; the tail liquid obtained in step S1, step S3 and step S4 is collected in the tail liquid recovery tank and then enters the electrolytic recovery machine to extract gold.

[0048] A corresponding liquid inlet valve 25 is fixedly installed on the first water inlet pipe 4, a corresponding water inlet valve is installed on the second water inlet pipe 10, and a corresponding liquid outlet valve is installed on the pipeline connecting the suction filtration container 14 and the washing tank 1, and the liquid inlet valve 25, the water inlet valve, the liquid outlet valve and the drive motor 8 are all electrically connected to the control system; the first water inlet pipe 4 and the second water inlet pipe 10 are both connected to an external water source, and the external water source is installed with a corresponding chiller and a thermometer.

[0049] The present invention installs a corresponding water inlet valve on the second water inlet pipe 10, installs a corresponding liquid outlet valve on the pipeline connecting the suction filtration container 14 and the washing tank 1, and the water inlet valve, the liquid outlet valve and the driving motor 8 are electrically connected to the control system. The pH value of the suction filtrate is measured by the pH meter 19 on the pipeline to determine the washing condition, and then the opening and closing of the water inlet valve is controlled to control the number and duration of washing. After the washing stops, backwashing is performed first and then suction filtration is performed to automatically and accurately determine the washing quality and reduce the workload of personnel.

[0050] The temperature of the water flowing into the washing tank 1 is precisely controlled by a water chiller and a thermometer to be maintained at 25-35° C., thereby ensuring the production quality and efficiency of potassium gold cyanide.

[0051] The mixing elements 7 are arranged in a circular array, and the nozzles 11 connected to the bent portions at the ends thereof are arranged in an up-and-down staggered manner.

[0052] The present invention uses a direction opposite to the mixing rotation direction of the mixing tube 6 for flushing. In the absence of other driving mechanisms, the recoil of water is used to drive the recoil mechanism to rotate and flush the surface of the filtration container 14, effectively preventing materials or impurities from sticking to the filtration container 14 and affecting vacuum filtration, making the filtration process smoother and improving the filtration effect. Furthermore, the one-way bearing 9 is used to install the output shaft of the gear and the drive motor 8, which can not only ensure the active drive of the drive motor 8 to the mixing tube 6, but also ensure the normal rotation of the recoil mechanism when the recoil mechanism is pushed back under the pressure of the water jet, thereby improving the practical performance of the present invention.

[0053] The mixing element 7 of the present invention is arranged in a circular array, and the lower end portion is arranged in a constricted shape and is bent in the same direction to be connected and installed with corresponding nozzles 11, the bending direction of the nozzle 11 is opposite to the rotation direction of the mixing tube 6 driven by the driving motor 8, and the nozzles 11 connected to the bent portion at the end are arranged in an up-and-down staggered manner. The same-direction arrangement can ensure that the mixing element 7 can form self-rotation under the impact pressure of the water flow sprayed by the nozzle 11 to flush the materials on the surface of the suction filter container 14, and the reverse setting and the cooperation of the one-way bearing 9 can effectively avoid the interference of the driving motor 8, ensuring the normal operation of the reverse rotation; furthermore, the nozzles 11 are arranged in an up-and-down staggered manner to ensure that the flushing surface covers the entire suction filter container 14, improving the comprehensiveness and efficiency of flushing.

[0054] The mixing element 7 and the mixing tube 6 are fixedly connected and installed with corresponding connecting pipes 18, and the connecting pipes 18 on the same mixing element 7 are arranged at intervals up and down. The connecting pipes 18 are used to install the mixing element 7 and the mixing tube 6, which not only ensures the support installation, but also connects the mixing element 7 and the mixing tube 6 of the hollow structure to ensure the circulation of water.

[0055] A corresponding pH meter 19 is installed on the pipeline connecting the suction filtration container 14 and the interlayer 13 .

[0056] The bottom side of the cover 2 is fixedly connected downwardly with a corresponding mounting tube 20 at a position corresponding to the mixing tube 6, and the mixing tube 6 is rotatably sleeved on the mounting tube 20 through a corresponding bearing 21; the bottom of the washing tank 1 is fixedly connected upwardly with a corresponding bearing seat 26 at a position corresponding to the mixing tube 6, and the mixing tube 6 is rotatably mounted on the bearing seat 26, and the lower part of the bearing seat 26 is supported and mounted in the washing tank 1 by a plurality of spaced first legs 22.

[0057] The washing tank 1 is supported and installed by the corresponding second supporting legs 23 , the feed pipe 3 is provided with a corresponding closing cover 24 which can be opened and closed, and the discharge pipe 5 is fixedly provided with a corresponding discharge valve 17 .

[0058] The inner side of the interlayer 13 is provided with a corresponding installation guide groove, and the ultrafiltration membrane 15 is detachably installed on the front side of the interlayer 13 through the cooperation of the guide groove and the slider, and is locked and fixed by the corresponding sealing ring and screw. On the basis of ensuring the installation sealing of the ultrafiltration membrane 15, the ultrafiltration membrane 15 is easy to disassemble and replace, and the filtration quality is ensured.

[0059] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for producing high-purity potassium cyanide gold, characterized in that: The specific steps include: S1, gold pretreatment: the gold ingot is pressed into thin gold sheets by a high-energy sheet press, and cut into small pieces by a shearing machine, and then the surface oil is washed away by ultrasonic cleaning, and finally washed with dilute nitric acid and blown dry; S2, electrochemical reaction: the gold flakes prepared in S1 are placed in a titanium basket and placed in an electrolytic cell, with the gold flakes as the anode, graphite or stainless steel as the cathode, potassium cyanide solution as the anode liquid, potassium hydroxide as the cathode liquid, and the cathode and the anode separated by a high-energy resin membrane and powered on for electrochemical reaction; S3, concentration, cooling and crystallization: the electrolyte after the reaction is cooled, crystallized and vacuum filtered to obtain crude potassium cyanide gold crystals, and the obtained concentrated slurry is discharged into the electrolytic cell for further use, and the condensed water after use is discharged and used in step S2 to dissolve potassium cyanide to prepare potassium cyanide solution; S4, washing and drying: the crude potassium cyanogen gold product obtained in step S3 is sequentially subjected to dissolution, cooling crystallization, pure water washing, vacuum filtration and drying to obtain a high-purity potassium cyanogen gold product; wherein the washing is carried out based on the following washing equipment, the washing equipment comprises a washing tank (1), a corresponding cover (2) is fixedly mounted on the upper part of the washing tank, a feed pipe (3) is arranged on the cover (2), and the top side wall and the bottom of the washing tank (1) are respectively provided with a corresponding first water inlet pipe (4) and a discharge pipe (5); The mixing mechanism comprises a mixing tube (6) rotatably mounted on the lower side of the cover (2), a plurality of corresponding mixing elements (7) being fixedly mounted on the mixing tube (6) and driven by a corresponding driving motor (8); the mixing tube (6) is connected to the output shaft end of the driving motor (8) by means of a gear meshing transmission, and the driving motor (8) and the gear are connected by means of a corresponding one-way bearing (9); A recoil mechanism, wherein the mixing tube (6) is a hollow tubular structure, the recoil mechanism comprises a second water inlet pipe (10) connected to the mixing tube (6) via a corresponding rotary joint (16), the mixing element (7) is a hollow tubular structure or a hollow plate structure and is arranged to be interconnected with the mixing tube (6), the lower end portion of the mixing element (7) is arranged in a constricted shape and is bent in the same direction and connected to corresponding nozzles (11), the bending direction of the nozzle (11) is opposite to the rotation direction of the mixing tube (6) driven by the driving motor (8); The filtration mechanism comprises an interlayer (13) arranged at the bottom of the washing tank (1), and a filtration container (14) connected to the interlayer (13) through a corresponding pipeline and a vacuum pump (12), and an ultrafiltration membrane (15) is arranged on the side of the interlayer (13) facing the washing tank (1).

2. A method for producing high-purity potassium cyanide gold according to claim 1, characterized in that: In step S2, the electrolysis current is 150-200A, the electrolysis voltage is 6-10V, and the electrolysis temperature is 70-80°C; and the waste gas generated by the electrolytic cell reaction and the ammonia and hydrogen cyanide generated by the dissolution of potassium cyanide are discharged into the alkaline washing tower for treatment.

3. A method for producing high-purity potassium cyanide gold according to claim 1, characterized in that: The cooling crystallization temperature of step S3 and step S4 is 5-10°C, the water washing temperature is 25-35°C, the water washing endpoint PH is 8-10, the drying temperature is 60-100°C, and the drying time for one batch is 9-10h; the tail liquid obtained in step S1, step S3 and step S4 is collected in the tail liquid recovery tank and then enters the electrolytic recovery machine to extract gold.

4. A method for producing high-purity potassium cyanide gold according to claim 1, characterized in that: A corresponding liquid inlet valve (25) is fixedly installed on the first water inlet pipe (4), a corresponding water inlet valve is installed on the second water inlet pipe (10), and a corresponding liquid outlet valve is installed on the pipeline connecting the suction filter container (14) and the washing tank (1); the liquid inlet valve (25), the water inlet valve, the liquid outlet valve and the driving motor (8) are all electrically connected to the control system; the first water inlet pipe (4) and the second water inlet pipe (10) are both connected to an external water source, and the external water source is installed with a corresponding water chiller and a thermometer.

5. A method for producing high-purity potassium cyanide gold according to claim 1, characterized in that: The mixing elements (7) are arranged in a circular array, and the nozzles (11) connected to the bent portions at the ends thereof are arranged in an up-and-down staggered manner.

6. A method for producing high-purity potassium cyanide gold according to claim 1, characterized in that: A corresponding connecting pipe (18) is fixedly connected between the mixing element (7) and the mixing tube (6), and the connecting pipes (18) on the same mixing element (7) are arranged at intervals up and down.

7. A method for producing high-purity potassium cyanide gold according to claim 1, characterized in that: A corresponding pH meter (19) is installed on the pipeline connecting the suction filtration container (14) and the interlayer (13).

8. A method for producing high-purity potassium cyanide gold according to claim 1, characterized in that: A corresponding mounting tube (20) is fixedly connected downwardly to the bottom side of the sealing cover (2) at a position corresponding to the mixing tube (6), and the mixing tube (6) is rotatably sleeved onto the mounting tube (20) via a corresponding bearing (21); a corresponding bearing seat (26) is fixedly connected upwardly to the bottom of the washing tank (1) at a position corresponding to the mixing tube (6), and the mixing tube (6) is rotatably mounted on the bearing seat (26), and the lower part of the bearing seat (26) is supported and mounted in the washing tank (1) via a plurality of first legs (22) spaced apart.

9. A method for producing high-purity potassium cyanide gold according to claim 1, characterized in that: The washing tank (1) is supported and installed by a corresponding second support leg (23); a corresponding closing cover (24) is installed on the feed pipe (3) in an openable and closable manner; and a corresponding discharge valve (17) is fixedly installed on the discharge pipe (5).

10. The method for producing high-purity potassium cyanide gold according to claim 1, characterized in that: The inner side of the interlayer (13) is provided with a corresponding installation guide groove, and the ultrafiltration membrane (15) is detachably installed on the front side of the interlayer (13) through the cooperation of the guide groove and the slider, and is sealed and locked by a corresponding sealing ring and a screw.

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