Thermal crystallization process of high-purity potassium aurous cyanide

Abstract

The invention relates to the technical field of production of potassium aurous cyanide, and discloses a thermal crystallization process of high-purity potassium aurous cyanide, which comprises the following steps: selecting a gold raw material, rolling to form a gold sheet, and pretreating the gold sheet; adding the pretreated gold platelets into electrolysis equipment, and carrying out electrolysis at preset voltage and current values by taking a potassium cyanide solution as anolyte; after the electrolysis operation is finished, heating and concentrating the filtered anolyte, and removing redundant water to obtain primary crystals; adding pure water, heating to dissolve the primary crystals again, acquiring dissolved state data of the primary crystals, and obtaining a dissolved state value based on the dissolved state data of the primary crystals; the solution with the dissolution state value meeting the requirement is placed in a freezer or a refrigerator to be frozen and drained to remove moisture, then drying is carried out, the high-purity potassium aurous cyanide thermal crystals are obtained, and recognition of the washing quality in the washing process is effectively completed through treatment of the dissolution state value.

Description

Technical Field

[0001] The invention relates to the technical field of potassium aurous cyanide production, and in particular to a high-purity potassium aurous cyanide thermal crystallization process. Background Art

[0002] At present, potassium cyanogen gold is commonly known as gold salt, with the chemical formula KAu(CN)2. Potassium cyanogen gold is a very important chemical reagent in gold plating and alloying processes. It is mainly used for electroplating and chemical gold plating. The coating is fine and bright, with strong corrosion resistance, good conductivity, and easy welding. It is widely used in the electroplating of parts that require long-term stable electrical parameter performance, such as precision instruments, printed circuit boards, integrated circuits, electronic tube shells, and electrical contacts, as well as the electroplating of jewelry, watch parts, artworks, and decorations. Other metal ions such as Ni and Co can also be added to the plating solution to improve the corrosion resistance of the coating or improve other properties. This makes potassium cyanogen gold very much in demand.

[0003] Currently, in the preparation process of potassium aurous cyanide, sufficient washing and effective control of temperature during the washing process are required during the initial crystallization and dissolution process.

[0004] Based on this, the present application proposes a high-purity potassium gold cyanide thermal crystallization process. Summary of the invention

[0005] The object of the present invention is to provide a high-purity potassium aurous cyanide thermal crystallization process. In the process of dissolving the primary crystal in pure water, the cleanliness of the washing and the washing temperature are detected, so that the dynamic value of the washing water and the washing temperature control value in the primary crystal dissolution process are obtained, and the quality of the primary crystal is identified through the dissolution state value.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A high-purity potassium cyanide gold thermal crystallization process comprises the following steps:

[0008] Select gold raw materials, perform rolling treatment to form gold sheets, and pre-treat the gold sheets;

[0009] The gold flakes are pretreated by washing them with a detergent, then rinsing them with a dilute sulfuric acid solution to dissolve the surface layer of the gold flakes, and finally washing them with clean water.

[0010] The pretreated gold flakes are added to an electrolysis device, and the potassium cyanide solution is used as the anolyte, and the electrolysis is performed at a predetermined voltage and current value;

[0011] After the electrolysis operation is completed, the filtered anolyte is heated and concentrated to remove excess water to obtain primary crystals;

[0012] Then, pure water is added and heated to dissolve the primary crystals again, and dissolution state data of the primary crystals are obtained, and a dissolution state value is obtained based on the dissolution state data of the primary crystals;

[0013] The solution whose solubility state value meets the requirements is placed in a freezer or refrigerator, frozen and drained to remove moisture, and then dried to obtain high-purity potassium cyanide gold thermal crystals.

[0014] As a further solution of the present invention: the dissolution state data of the primary crystallization includes a washing water dynamic value and a washing temperature control value.

[0015] As a further solution of the present invention: the dynamic value of washing water is recorded as Xs;

[0016] and the washing temperature control value is recorded as Xw;

[0017] By formula The dissolution state data of the initial crystallization is calculated to obtain the dissolution state value Xi, wherein w1 and w2 are preset proportional coefficients corresponding to the set washing water dynamic value Xs and washing temperature control value Xw, respectively.

[0018] If the dissolution state value obtained by the dissolution state data of the initial crystallization is less than the dissolution state threshold value obtained by the dissolution state data of the initial crystallization, it means that the dissolution state value meets the requirement, otherwise, it does not meet the requirement.

[0019] As a further solution of the present invention: the process of obtaining the dynamic value of washing water is as follows;

[0020] Treat the washing water before use to obtain the effective value of the solution color before washing;

[0021] Treat the washing water after use to obtain the effective value of the color of the solution after washing;

[0022] The effective value of the solution color after washing is processed with the effective value of the solution color before washing, and the absolute value is taken to obtain the washing water color deviation value;

[0023] The washing water color deviation value is ratio-processed with the effective value of the solution color before washing to obtain the washing water dynamic value.

[0024] As a further solution of the present invention: the process of obtaining the effective value of the solution color is:

[0025] Taking a photo of the washing water to obtain a washing water image, and extracting color features of the washing water image;

[0026] Get the R value in the washing water image, the G value in the washing water image, and the B value in the washing water image

[0027] The Rq value in the washing water image, the Gq value in the washing water image, and the Bq value in the washing water image are weighted to obtain the effective value of the solution color.

[0028] As a further solution of the present invention: the process of obtaining the washing temperature control value is:

[0029] Dividing the total washing time of the washing water into a number of washing time sub-units;

[0030] Obtain the water temperature corresponding to the washing water at the middle moment of each washing time subunit, and record it as the washing water temperature;

[0031] The washing water temperature of each washing time subunit is processed to obtain a reverse washing number difference ratio and a reverse washing temperature difference ratio;

[0032] The reverse washing number difference ratio and the reverse washing temperature difference ratio are multiplied to obtain the washing temperature control value.

[0033] As a further solution of the present invention: the process of obtaining the reverse washing number difference ratio is:

[0034] If the washing water temperature value of the washing time subunit is within the preset washing water temperature range, it means that the washing water temperature of the washing time subunit meets the requirements, and the corresponding washing time subunit is recorded as a forward washing unit;

[0035] If the washing water temperature value of the washing time subunit is outside the preset washing water temperature range, it means that the washing water temperature of the washing time subunit does not meet the requirements, and the corresponding washing time subunit is recorded as a reverse washing unit;

[0036] The ratio of the number of reverse washing units to the number of washing time sub-units is calculated to obtain the reverse washing number difference ratio.

[0037] As a further solution of the present invention: the process of obtaining the reverse washing temperature difference ratio is as follows:

[0038] The washing water temperatures of all forward washing units are summed and averaged to obtain the forward washing water temperature;

[0039] The difference between the washing water temperature of each reverse washing unit and the middle value of the washing water temperature is calculated, and the absolute value is taken to obtain the temperature deviation value of the reverse washing unit;

[0040] The temperature deviation values ​​of all reverse washing units are summed and averaged to obtain the reverse washing water temperature.

[0041] The beneficial effects of the present invention are as follows: after the electrolysis operation is completed, the filtered anolyte is heated and concentrated to remove excess water to obtain primary crystals. During the dissolution process of the primary crystals connected to pure water, the cleanliness of the washing and the washing temperature are detected, that is, the dynamic value of the washing water and the washing temperature control value in the dissolution process of the primary crystals are obtained. The dissolution state data of the primary crystals are obtained by the dynamic value of the washing water and the washing temperature control value to obtain the dissolution state value, and the quality of the primary crystals is identified through the dissolution state value. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present invention will be further described below in conjunction with the accompanying drawings.

[0043] Figure 1 This is a flow chart of a high-purity potassium cyanide thermal crystallization process according to an embodiment of the present invention;

[0044] Figure 2 It is a flow chart of the identification of the washing time subunit of a high-purity potassium cyanide gold thermal crystallization process according to an embodiment of the present invention;

[0045] Figure 3 It is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figure 1-Figure 2 As shown, the present invention is a high-purity potassium cyanide gold thermal crystallization process, comprising the following steps:

[0048] Select gold raw materials, perform rolling treatment to form gold sheets, and pre-treat the gold sheets;

[0049] The gold flakes are pretreated by washing them with a detergent, then rinsing them with a dilute sulfuric acid solution to dissolve the surface layer of the gold flakes, and finally washing them with clean water.

[0050] The pretreated gold flakes are added to an electrolysis device, and the potassium cyanide solution is used as the anolyte, and the electrolysis is performed at a predetermined voltage and current value;

[0051] After the electrolysis operation is completed, the filtered anolyte is heated and concentrated to remove excess water to obtain primary crystals;

[0052] Then, pure water is added and heated to dissolve the primary crystals again, and dissolution state data of the primary crystals are obtained, and a dissolution state value is obtained based on the dissolution state data of the primary crystals;

[0053] The solution whose solubility state value meets the requirements is placed in a freezer or refrigerator, frozen and drained to remove moisture, and then dried to obtain high-purity potassium cyanide gold thermal crystals.

[0054] Example 2

[0055] The dissolution state data of the primary crystallization include the dynamic value of the washing water and the washing temperature control value;

[0056] The process of obtaining the dynamic value of washing water is as follows:

[0057] Before using the washing water, take a photo of the washing water to obtain a washing water image, and perform color feature extraction on the washing water image;

[0058] Get the R value in the washing water image, marked as Rq;

[0059] Get the G value in the washing water image, marked as Gq;

[0060] Get the B value in the wash water image, marked as Bq;

[0061] The Rq value in the washing water image, the Gq value in the washing water image, and the Bq value in the washing water image are weighted to obtain the effective value of the solution color before washing;

[0062] In a specific embodiment, the weight ratio of the Rq value in the washing water image is assigned to n1, the weight ratio of the Gq value in the washing water image is assigned to n2, and the weight ratio of the Bq value in the washing water image is assigned to n3;

[0063] The effective color value RGB1 of the washing water solution before use is calculated according to the formula RGB1=Rq*n1+Gq*n2+Bq*n3, wherein n1+n2+n3=1, and n3, n2, and n1 are all greater than 0;

[0064] After washing the washing water, taking a photo of the washed water to obtain an image of the washed water, and extracting color features of the image of the washed water;

[0065] Get the R value in the washing water image after cleaning, marked as Rh;

[0066] Get the G value in the washing water image after cleaning, marked as Gh;

[0067] Get the B value in the washing water image after cleaning, marked as Bh;

[0068] The Rh value in the washing water image after cleaning, the Gh value in the washing water image after cleaning, and the Bh value in the washing water image after cleaning are weighted to obtain the effective value of the color of the solution after cleaning.

[0069] In a specific embodiment, the weight ratio of the Rh value in the pickling liquid image after cleaning is assigned to n1, the weight ratio of the Gh value in the pickling liquid image after cleaning is assigned to n2, and the weight ratio of the Bh value in the pickling liquid image after cleaning is assigned to n3;

[0070] The dynamic color value RGB2 of the pickling solution after cleaning is calculated according to the formula RGB2=Rh*n1+Gh*n2+Bh*n3, where n1+n2+n3=1, n3, n2, and n1 are all greater than 0;

[0071] The effective value of the solution color after washing is processed with the effective value of the solution color before washing, and the absolute value is taken to obtain the washing water color deviation value;

[0072] The washing water color deviation value is ratio-processed with the effective value of the solution color before washing to obtain the washing water dynamic value.

[0073] Among them, the process of obtaining the washing temperature control value is:

[0074] Dividing the total washing time of the washing water into a number of washing time sub-units;

[0075] Obtain the water temperature corresponding to the washing water at the middle moment of each washing time subunit, and record it as the washing water temperature;

[0076] Compare the washing water temperature of each washing time subunit with the preset washing water temperature;

[0077] If the washing water temperature value of the washing time subunit is within the preset washing water temperature range, it means that the washing water temperature of the washing time subunit meets the requirements, and the corresponding washing time subunit is recorded as a forward washing unit;

[0078] If the washing water temperature value of the washing time subunit is outside the preset washing water temperature range, it means that the washing water temperature of the washing time subunit does not meet the requirements, and the corresponding washing time subunit is recorded as a reverse washing unit;

[0079] The number of reverse washing units is obtained, and the ratio of the number of reverse washing units to the number of washing time sub-units is calculated to obtain the reverse washing number difference ratio;

[0080] The washing water temperatures of all forward washing units are summed and averaged to obtain the forward washing water temperature;

[0081] The difference between the washing water temperature of each reverse washing unit and the middle value of the washing water temperature is calculated, and the absolute value is taken to obtain the temperature deviation value of the reverse washing unit;

[0082] The middle value of the washing water temperature is the middle temperature value of the preset washing water temperature range;

[0083] The temperature deviation values ​​of all reverse washing units are summed and averaged to obtain the reverse washing water temperature;

[0084] The difference between the reverse washing water temperature and the forward washing water temperature is calculated to obtain the reverse washing temperature difference value;

[0085] The reverse washing temperature difference value is calculated by ratio with the forward washing water temperature to obtain the reverse washing temperature difference ratio;

[0086] The reverse washing number difference ratio and the reverse washing temperature difference ratio are multiplied to obtain the washing temperature control value.

[0087] The dynamic value of wash water is recorded as Xs;

[0088] and the washing temperature control value is recorded as Xw;

[0089] By formula The dissolution state data of the initial crystallization is calculated to obtain the dissolution state value Xi, where w1 and w2 are the preset proportional coefficients corresponding to the set washing water dynamic value Xs and the washing temperature control value Xw, respectively, and w1 and w2 satisfy w1+w2=1, 0<w1<w2<1, and w1=0.38 and w2=0.62.

[0090] If the dissolution state value obtained by the dissolution state data of the initial crystallization is less than the dissolution state threshold value obtained by the dissolution state data of the initial crystallization, it means that the dissolution state value meets the requirement, otherwise, it does not meet the requirement.

[0091] Example 3

[0092] Reference Figure 3 The embodiment of the present invention further provides a computer device 3, comprising: a memory 302 and a processor 301 and a computer program 303 stored in the memory 302. When the computer program 303 is executed on the processor 301, a high-purity potassium cyanide thermal crystallization process as described in any one of the above methods is implemented.

[0093] The computer device 3 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The computer device 3 may include, but is not limited to, a processor 301 and a memory 302. Those skilled in the art will appreciate that

[0094] Figure 3It is only an example of computer device 3 and does not constitute a limitation on computer device 3. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components, for example, it may also include input and output devices, network access devices, etc.

[0095] The processor 301 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0096] In some embodiments, the memory 302 may be an internal storage unit of the computer device 3, such as a hard disk or memory of the computer device 3. In other embodiments, the memory 302 may also be an external storage device of the computer device 3, such as a plug-in hard disk, a smart memory card (SmartMediaCard, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the computer device 3. Further, the memory 302 may also include both an internal storage unit of the computer device 3 and an external storage device. The memory 302 is used to store an operating system, an application program, a boot loader (BootLoader), data, and other programs, such as the program code of the computer program. The memory 302 may also be used to temporarily store data that has been output or is to be output.

[0097] Example 4

[0098] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, a high-purity potassium gold cyanide thermal crystallization process as described in any one of the above methods is implemented.

[0099] In this embodiment, if the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium can at least include: any entity or device that can carry the computer program code to the camera / terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. For example, a USB flash drive, a mobile hard disk, a disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0100] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0101] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0102] In the embodiments disclosed in the present application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0103] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0104] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0105] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A high-purity potassium cyanide gold thermal crystallization process, characterized in that, The following steps are involved: Select gold raw materials, perform rolling treatment to form gold sheets, and pre-treat the gold sheets; The gold flakes are pretreated by washing them with a detergent, then rinsing them with a dilute sulfuric acid solution to dissolve the surface layer of the gold flakes, and finally washing them with clean water. The pretreated gold flakes are added to an electrolysis device, and the potassium cyanide solution is used as the anolyte, and the electrolysis is performed at a predetermined voltage and current value; After the electrolysis operation is completed, the filtered anolyte is heated and concentrated to remove excess water to obtain primary crystals; Then, pure water is added and heated to dissolve the primary crystals again, and dissolution state data of the primary crystals are obtained, and a dissolution state value is obtained based on the dissolution state data of the primary crystals; The solution whose solubility state value meets the requirements is placed in a freezer or refrigerator, frozen and drained to remove moisture, and then dried to obtain high-purity potassium cyanide gold thermal crystals.

2. A high-purity potassium cyanide gold thermal crystallization process according to claim 1, characterized in that: The dissolution state data of the primary crystallization include the dynamic value of the washing water and the washing temperature control value.

3. A high-purity potassium cyanide gold thermal crystallization process according to claim 2, characterized in that: The dynamic value of wash water is recorded as Xs; and the washing temperature control value is recorded as Xw; By formula The dissolution state data of the initial crystallization is calculated to obtain the dissolution state value Xi, wherein w1 and w2 are preset proportional coefficients corresponding to the set washing water dynamic value Xs and washing temperature control value Xw, respectively. If the dissolution state value obtained by the dissolution state data of the initial crystallization is less than the dissolution state threshold value obtained by the dissolution state data of the initial crystallization, it means that the dissolution state value meets the requirement, otherwise, it does not meet the requirement.

4. A high-purity potassium cyanide gold thermal crystallization process according to claim 2, characterized in that: The process of obtaining the dynamic value of washing water is as follows; Treat the washing water before use to obtain the effective value of the solution color before washing; Treat the washing water after use to obtain the effective value of the color of the solution after washing; The effective value of the solution color after washing is processed with the effective value of the solution color before washing, and the absolute value is taken to obtain the washing water color deviation value; The washing water color deviation value is ratio-processed with the effective value of the solution color before washing to obtain the washing water dynamic value.

5. A high-purity potassium cyanide gold thermal crystallization process according to claim 4, characterized in that: The process of obtaining the effective value of solution color is as follows: Taking a photo of the washing water to obtain a washing water image, and extracting color features of the washing water image; Get the R value in the washing water image, the G value in the washing water image, and the B value in the washing water image The Rq value in the washing water image, the Gq value in the washing water image, and the Bq value in the washing water image are weighted to obtain the effective value of the solution color.

6. A high-purity potassium cyanide gold thermal crystallization process according to claim 2, characterized in that: The process of obtaining the washing temperature control value is as follows: Dividing the total washing time of the washing water into a number of washing time sub-units; Obtain the water temperature corresponding to the washing water at the middle moment of each washing time subunit, and record it as the washing water temperature; The washing water temperature of each washing time subunit is processed to obtain a reverse washing number difference ratio and a reverse washing temperature difference ratio; The reverse washing number difference ratio and the reverse washing temperature difference ratio are multiplied to obtain the washing temperature control value.

7. A high-purity potassium cyanide gold thermal crystallization process according to claim 6, characterized in that: The process of obtaining the reverse washing ratio is as follows: If the washing water temperature value of the washing time subunit is within the preset washing water temperature range, it means that the washing water temperature of the washing time subunit meets the requirements, and the corresponding washing time subunit is recorded as a forward washing unit; If the washing water temperature value of the washing time subunit is outside the preset washing water temperature range, it means that the washing water temperature of the washing time subunit does not meet the requirements, and the corresponding washing time subunit is recorded as a reverse washing unit; The ratio of the number of reverse washing units to the number of washing time sub-units is calculated to obtain the reverse washing number difference ratio.

8. A high-purity potassium cyanide gold thermal crystallization process according to claim 6, characterized in that: The process of obtaining the reverse washing temperature difference ratio is as follows: The washing water temperatures of all forward washing units are summed and averaged to obtain the forward washing water temperature; The difference between the washing water temperature of each reverse washing unit and the middle value of the washing water temperature is calculated, and the absolute value is taken to obtain the temperature deviation value of the reverse washing unit; The temperature deviation values ​​of all reverse washing units are summed and averaged to obtain the reverse washing water temperature.

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