Preparation process of potassium aurous cyanide

Abstract

The invention belongs to the technical field of gold plating, and particularly relates to a preparation process of potassium aurous cyanide, which comprises the following steps: analyzing whether the temperature change is synchronous with the gold element consumption rate change or not by monitoring the temperature change and the gold element consumption rate change in different time intervals and different areas in a period; the method is beneficial for analyzing influence factors of gold element consumption rate change to obtain whether the gold element consumption rate change is related to temperature change or not, is beneficial for avoiding gold element consumption rate abnormity caused by reaction temperature change, and avoids waste of raw materials and increase of energy consumption by regulating and controlling the influence factors and controlling the reaction rate. Untoward effects such as the utilization rate of raw materials are reduced, loss is reduced, and the economic effect of production is improved; the occurrence of side reaction is favorably reduced, and the purity of the potassium aurous cyanide is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of gold plating, in particular to a preparation process of potassium aurous cyanide. Background Art

[0002] Potassium cyanogen gold is mainly used for electroplating of electronic products, especially as the main raw material for gold plating, and is widely used in electronic information industries such as printed circuit boards, connectors, and semiconductor devices. In addition, it is also used in decorative gold plating fields such as jewelry, clocks, musical instruments, handicrafts, and hardware parts. These fields have a large demand for potassium cyanogen gold and high quality requirements, so the optimization and improvement of the preparation process is particularly important.

[0003] A Chinese patent application with publication number CN110804741A discloses a preparation process involving potassium cyanogen gold, comprising the following steps: (1) cleaning of gold flakes: first soaking in dilute nitric acid, then rinsing with pure water, and drying; (2) electrochemical dissolution: electrolysis at 65-75°C, voltage 6-7V, and current density 60-150A / m2; (3) cooling crystallization: cooling and crystallizing the electrolyte twice, filtering, washing the potassium cyanogen gold crystals with pure water to pH=8-10, and vacuum filtering; (4) drying: drying the crystals at 80-100°C for 8-10h. The preparation process provided by the present invention has reasonable electrolysis conditions, provides a good environment for gold electrolysis, greatly improves the gold electrolysis rate, and the gold electrolysis rate can reach more than 85%. The mass fraction of gold in the product after crystallization can reach more than 68.3%. The potassium cyanogen gold produced has stable quality, controllable production cost, and good economic benefits.

[0004] In the prior art, the consumption rate of raw materials is closely related to the reaction rate. Abnormal consumption of raw materials means abnormal reaction, which will affect the purity of potassium gold cyanide crystals. There are deficiencies in analyzing the influence of temperature on the reaction rate and raw material consumption, and in analyzing whether there are other influencing factors besides temperature when the raw material consumption rate is abnormal.

[0005] To this end, the invention provides a preparation process of potassium aurous cyanide. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] As a further technical solution of the present invention, the gold nugget or electrolytic gold powder is first rinsed with deionized water, then boiled and washed in dilute nitric acid for 5 to 10 minutes, the nitric acid is drained and then rinsed with deionized water;

[0009] Add aqua regia in batches. Heat it just after adding it to start the reaction. When the reaction is more intense, stop heating and keep the aqua regia solution at a slight boiling state. When the reaction is relatively slow, add a small amount of aqua regia until most of the gold nuggets or gold powder are dissolved.

[0010] At the end of the reaction, a small amount of unreacted gold must be present, i.e., an excess of gold must be ensured when feeding;

[0011] Pour the gold dissolving solution into another beaker, wash the unreacted gold nuggets or gold powder with water, transfer to the next cycle for use, and merge the washing solution into the gold dissolving solution;

[0012] Heat and drop concentrated hydrochloric acid to remove nitrogen oxides to obtain chloroauric acid solution;

[0013] Dissolve the blood-red thick substance with 5 times the volume of deionized water in the high concentration chloroauric acid solution (thick);

[0014] Slowly add ammonia water (10 ml of concentrated ammonia water is required for 1 g Au) under constant stirring to make chloroauric acid generate gold fulminate precipitate;

[0015] Heat is used to remove excess ammonia, and water is continuously added to prevent the precipitate from drying out;

[0016] Wash with hot water 3 to 4 times until there is no chloride ion. The resulting precipitate is gold fulminate (Au2O3·4NH3);

[0017] Put the gold fulminate precipitate together with the filter paper into a 15% to 20% KCN solution and slowly heat to dissolve to obtain a colorless and transparent potassium cyanide gold solution;

[0018] The obtained potassium cyanogen gold solution is filtered, the filtrate is evaporated, and cooled for crystallization to obtain potassium cyanogen gold crystals;

[0019] Monitor the consumption rate of gold element during the generation process of potassium cyanogen gold solution, analyze whether the consumption rate of gold element is abnormal, and generate analysis signals; the analysis signals are divided into normal consumption signals and abnormal consumption signals;

[0020] Based on the abnormal consumption signal, the temperature change in the reaction process is obtained; the influence of the temperature change on the consumption rate of the gold element is analyzed to obtain the temperature influence value; whether the temperature change has an influence on the consumption rate of the gold element is determined, and an influence signal is generated, wherein the influence signal includes a temperature influence signal and a non-temperature influence signal;

[0021] Based on the temperature influence signal, the change overlap value is obtained; and according to the change overlap value, it is determined whether there are other influencing factors for the abnormal consumption rate of the gold element.

[0022] As a further technical solution of the present invention, the temperature impact value is obtained by summing the cycle number ratio and the consumption rate ratio.

[0023] As a further technical solution of the present invention, the cycle number ratio is obtained in the following manner:

[0024] The consumption rate of gold element in the monitoring period is obtained, and it is divided into several consumption sub-periods of equal time length. The consumption rate of gold element in the consumption sub-period is obtained, and the consumption rate of gold element in each consumption sub-period is compared with the gold element consumption threshold. The specific process is as follows:

[0025] If the gold element consumption rate is less than or equal to the gold element consumption threshold, a normal consumption signal is generated;

[0026] If the gold element consumption rate is greater than the gold element consumption threshold, an abnormal consumption signal is generated;

[0027] Marking the consumption sub-cycle corresponding to the abnormal consumption signal as an abnormal consumption sub-cycle, and marking the consumption sub-cycle corresponding to the normal consumption signal as a normal consumption sub-cycle;

[0028] Based on the abnormal consumption signal, the temperature change data within the detection period is obtained and analyzed to obtain the temperature deviation value;

[0029] Get the temperature deviation value of each consumption sub-cycle, and compare the temperature deviation value with the temperature deviation threshold. Specifically:

[0030] If the temperature deviation value is less than or equal to the temperature deviation threshold, a normal signal is generated;

[0031] If the temperature deviation value is greater than the temperature deviation threshold, an abnormal signal is generated;

[0032] Mark the consumption sub-period corresponding to the abnormal signal as an abnormal temperature sub-period, and mark the consumption sub-period corresponding to the normal signal as a normal temperature sub-period;

[0033] The number of consumption sub-cycles marked as abnormal consumption sub-cycles and abnormal temperature sub-cycles is counted and ratioed with the total number of consumption sub-cycles to obtain a cycle number ratio.

[0034] As a further technical solution of the present invention, the reaction area is evenly divided into several sub-areas according to the area, the temperature of each sub-area is obtained, the temperature of each sub-area is subjected to difference processing with the standard area temperature, and the absolute value is taken to obtain the area temperature difference, the area temperature difference is subjected to ratio processing with the standard area temperature difference to obtain the area temperature ratio, and the area temperature ratio is compared with the standard area temperature ratio, specifically:

[0035] If the regional temperature ratio is greater than the standard regional temperature ratio, a regional anomaly signal is generated;

[0036] If the regional temperature ratio is less than or equal to the standard regional temperature ratio, a regional normal signal is generated;

[0037] Based on the regional abnormal signal, marking the region generating the regional abnormal signal as an abnormal region;

[0038] The consumption rate of gold elements in the abnormal area is obtained and marked as the regional consumption rate; the regional consumption rate is compared with the standard regional consumption rate to obtain the consumption rate ratio.

[0039] As a further technical solution of the present invention, the comparison process of the temperature impact value and the temperature impact threshold is:

[0040] The temperature impact value is compared with the temperature impact threshold. The comparison process is:

[0041] If the temperature impact value is less than or equal to the temperature impact threshold, a non-temperature impact signal is generated;

[0042] If the temperature influence value is greater than the temperature influence threshold, a temperature influence signal is generated.

[0043] As a further technical solution of the present invention, the method for obtaining the change overlap value is:

[0044] Based on the peak values ​​of the temperature change curve and the consumption rate change curve corresponding to the odd group or the even group at the same time, the time intervals between all the peak values ​​and the trough values ​​of the temperature change curve and the time interval between the first peak value / trough value and the start time are obtained, and the obtained data are arranged in chronological order to obtain a temperature fluctuation data group;

[0045] Obtain the time intervals between all peak values ​​and trough values ​​of the consumption rate change curve and the time interval between the first peak value / trough value and the start time, arrange the obtained data in chronological order, and obtain a consumption rate fluctuation data group;

[0046] Perform difference processing on the corresponding data in the temperature fluctuation data group and the consumption rate fluctuation data group to obtain a difference data group; obtain the average value of all the data in the difference data group to obtain the change overlap value.

[0047] As a further technical solution of the present invention, the specific process of judging whether the peak values ​​of the temperature change curve and the consumption rate change curve correspond to the odd number group or the even number group at the same time is as follows:

[0048] Based on the fact that the temperature change curve and the consumption rate change curve have the same number of peak values ​​and trough values, the times corresponding to all the peak values ​​and trough values ​​of the temperature change curve and the consumption rate change curve are arranged in chronological order, and all the peak values ​​and trough values ​​are marked with serial numbers according to the arrangement order, and are divided into odd groups and even groups according to the parity of the serial numbers.

[0049] Analyze whether the peak values ​​of the temperature change curve and the consumption rate change curve correspond to odd groups or even groups at the same time, and obtain a peak analysis signal;

[0050] If the peak values ​​of the temperature change curve and the consumption rate change curve correspond to the odd-numbered group or the even-numbered group at the same time, a peak synchronization signal is generated;

[0051] If the peak values ​​of the temperature change curve and the consumption rate change curve do not correspond to the odd-numbered group or the even-numbered group at the same time, a peak asynchronous signal is generated.

[0052] As a further technical solution of the present invention, the temperature change curve and the consumption rate change curve are obtained by:

[0053] Based on the temperature influence signal, the temperature of all sub-areas is obtained, and an XY two-dimensional coordinate system is constructed with time as the X-axis and the temperature of the sub-area as the Y-axis. The temperature of each consumption sub-interval is marked and connected on the XY two-dimensional coordinate system to obtain the temperature change curve of the sub-area;

[0054] The gold consumption rates of all sub-areas are obtained, and an XY two-dimensional coordinate system is constructed with time as the X-axis and the gold consumption rate of the sub-area as the Y-axis. The gold consumption rate of each consumption sub-interval is marked and connected on the XY two-dimensional coordinate system to obtain the consumption rate change curve of the sub-area.

[0055] As a further technical solution of the present invention, the process of comparing the change overlap value with the change overlap threshold is as follows:

[0056] The obtained change coincidence value is compared with the change coincidence threshold value to obtain an analysis signal;

[0057] If the change coincidence value is greater than the change coincidence threshold, an out-of-sync signal is generated;

[0058] If the change coincidence value is less than or equal to the change coincidence threshold, a synchronization signal is generated.

[0059] The beneficial effects of the present invention are as follows:

[0060] 1. The technical solution of Example 3 of the present invention is: obtaining the consumption rate of gold element in the monitoring period, dividing it into a number of consumption sub-periods of equal time length for analysis and processing, obtaining abnormal consumption sub-periods, processing the abnormal consumption sub-periods, obtaining abnormal temperature sub-periods; analyzing the consumption sub-periods marked as abnormal consumption sub-periods and abnormal temperature sub-periods at the same time, obtaining the ratio of the number of periods; dividing the reaction area into a number of sub-areas by average area, processing the temperature of each sub-area, obtaining the abnormal temperature area, analyzing the consumption rate of gold element in the abnormal temperature area, obtaining the consumption rate ratio; and calculating the consumption rate ratio. The temperature influence value is obtained by processing the ratio of the number of cycles; whether the temperature affects the consumption rate of the gold element is analyzed, the temperature influence value is compared with the temperature influence threshold value, and an influence signal is generated; the present invention analyzes whether the change in the consumption rate of the gold element is related to the change in temperature by monitoring the temperature changes and the changes in the consumption rate of the gold element in different time intervals and different regions within the cycle, which is beneficial to avoid the adverse reactions such as abnormal consumption rate of the gold element caused by the reaction temperature change, incomplete reaction, and reduced utilization rate of raw materials, thereby reducing losses and improving the economic benefits of production; it is beneficial to reduce the occurrence of side reactions and improve the purity of potassium gold cyanide.

[0061] 2. The technical solution of Example 3 of the present invention is: obtaining the temperature and gold consumption rate of all sub-areas, constructing a temperature change curve and a consumption rate change curve, analyzing and processing the peak value and trough value parameters of the temperature change curve and the consumption rate change curve, and obtaining a consumption rate fluctuation data group; analyzing the consumption rate fluctuation data group to obtain a change overlap value; comparing the change overlap value with the change overlap threshold value to analyze whether the change in the gold consumption rate is caused by temperature change; the present invention determines whether the main reason for the change in the gold consumption rate is temperature change by analyzing the temperature change and the gold consumption rate change; it is conducive to analyzing the influencing factors of the change in the gold consumption rate, and controlling the reaction rate by regulating the influencing factors, avoiding waste of raw materials and increase in energy consumption, reducing production costs, avoiding side reactions, and improving the purity and production efficiency of potassium aurous cyanide crystals. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The present invention will be further described below in conjunction with the accompanying drawings.

[0063] Figure 1 It is a flow chart of the steps of a process for preparing potassium gold cyanide according to an embodiment of the present invention; Figure 2 It is a flow chart of the steps of obtaining the temperature influence value of a preparation process of potassium gold cyanide according to an embodiment of the present invention; Figure 3 The present invention is a flowchart of the steps of obtaining a change overlap value in a preparation process of potassium gold cyanide according to an embodiment of the present invention. DETAILED DESCRIPTION

[0066] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0067] Example 1

[0068] like Figure 1 - Figure 2 - Figure 3 As shown, a preparation process of potassium gold cyanide according to an embodiment of the present invention comprises:

[0069] Step 1: Rinse the gold nugget or electrolytic gold powder with deionized water, then boil it in dilute nitric acid for 5 to 10 minutes, drain the nitric acid and rinse it with deionized water again;

[0070] Add aqua regia in batches. Heat it just after adding it to start the reaction. When the reaction is more intense, stop heating and keep the aqua regia solution at a slight boiling state. When the reaction is relatively slow, add a small amount of aqua regia until most of the gold nuggets or gold powder are dissolved.

[0071] At the end of the reaction, a small amount of unreacted gold must be present, i.e., an excess of gold must be ensured when feeding;

[0072] Pour the gold dissolving solution into another beaker, wash the unreacted gold nuggets or gold powder with water, transfer to the next cycle for use, and merge the washing solution into the gold dissolving solution;

[0073] Heat and drop concentrated hydrochloric acid to remove nitrogen oxides to obtain chloroauric acid solution;

[0074] Dissolve the blood-red thick substance with 5 times the volume of deionized water in the high concentration chloroauric acid solution (thick);

[0075] Slowly add ammonia water (10 ml concentrated ammonia water for 1 g Au) under constant stirring to make chloroauric acid generate gold fulminate precipitate;

[0076] Heat is used to remove excess ammonia, and water is continuously added to prevent the precipitate from drying out;

[0077] Wash with hot water 3 to 4 times until there is no chloride ion. The resulting precipitate is gold fulminate (Au2O3·4NH3);

[0078] Put the gold fulminate precipitate together with the filter paper into a 15% to 20% KCN solution and slowly heat to dissolve to obtain a colorless and transparent potassium cyanide gold solution;

[0079] The obtained potassium cyanogen gold solution is filtered, the filtrate is evaporated, and cooled for crystallization to obtain potassium cyanogen gold crystals;

[0080] Step 2: monitoring the consumption rate of gold element during the generation process of potassium cyanide gold solution, analyzing whether the consumption rate of gold element is abnormal, and generating an analysis signal; the analysis signal is divided into a normal consumption signal and an abnormal consumption signal;

[0081] Based on the abnormal consumption signal, the temperature change in the reaction process is obtained; the influence of the temperature change on the consumption rate of the gold element is analyzed to obtain the temperature influence value; whether the temperature change has an influence on the consumption rate of the gold element is determined, and an influence signal is generated, wherein the influence signal includes a temperature influence signal and a non-temperature influence signal;

[0082] Based on the temperature influence signal, the change overlap value is obtained; and according to the change overlap value, it is determined whether there are other influencing factors for the abnormal consumption rate of the gold element.

[0083] Example 2

[0084] like Figure 2 As shown, based on Example 1, a preparation process of potassium gold cyanide described in an embodiment of the present invention comprises:

[0085] Step 3: Obtain the consumption rate of the gold element within the monitoring period, divide it into several consumption sub-periods of equal time length for analysis and processing, obtain abnormal consumption sub-periods, process the abnormal consumption sub-periods, obtain abnormal temperature sub-periods; analyze the consumption sub-periods marked as abnormal consumption sub-periods and abnormal temperature sub-periods at the same time, and obtain the ratio of the number of cycles; divide the reaction area into several sub-areas according to the area, process the temperature of each sub-area, obtain the temperature abnormal area, analyze the consumption rate of the gold element in the temperature abnormal area, and obtain the consumption rate ratio; process the consumption rate ratio and the cycle number ratio to obtain the temperature impact value;

[0086] The consumption rate of gold element in the monitoring period is obtained, and it is divided into several consumption sub-periods of equal time length. The consumption rate of gold element in the consumption sub-period is obtained, and the consumption rate of gold element in each consumption sub-period is compared with the gold element consumption threshold. The specific process is as follows:

[0087] If the gold element consumption rate is less than or equal to the gold element consumption threshold, a normal consumption signal is generated;

[0088] If the gold element consumption rate is greater than the gold element consumption threshold, an abnormal consumption signal is generated;

[0089] Marking the consumption sub-cycle corresponding to the abnormal consumption signal as an abnormal consumption sub-cycle, and marking the consumption sub-cycle corresponding to the normal consumption signal as a normal consumption sub-cycle;

[0090] Based on the abnormal consumption signal, the temperature change data within the detection period is obtained and analyzed to obtain the temperature deviation value;

[0091] It should be noted that the temperature deviation value represents the difference between the average temperature in the consumption sub-period and the standard temperature; the consumption sub-period is divided into a number of sub-intervals of equal time, the temperature value of each division point is obtained, and the obtained temperature values ​​of each division point are summed and averaged to obtain the temperature deviation value;

[0092] Get the temperature deviation value of each consumption sub-cycle, and compare the temperature deviation value with the temperature deviation threshold. Specifically:

[0093] If the temperature deviation value is less than or equal to the temperature deviation threshold, a normal signal is generated;

[0094] If the temperature deviation value is greater than the temperature deviation threshold, an abnormal signal is generated;

[0095] Mark the consumption sub-period corresponding to the abnormal signal as an abnormal temperature sub-period, and mark the consumption sub-period corresponding to the normal signal as a normal temperature sub-period;

[0096] The number of consumption sub-cycles marked as abnormal consumption sub-cycles and abnormal temperature sub-cycles is counted and the ratio is processed with the total number of consumption sub-cycles to obtain a cycle number ratio;

[0097] The reaction area is divided into several sub-areas by area, the temperature of each sub-area is obtained, the temperature of each sub-area is subjected to difference processing with the standard area temperature, and the absolute value is taken to obtain the area temperature difference, the area temperature difference is subjected to ratio processing with the standard area temperature difference to obtain the area temperature ratio, and the area temperature ratio is compared with the standard area temperature ratio, specifically:

[0098] If the regional temperature ratio is greater than the standard regional temperature ratio, a regional anomaly signal is generated;

[0099] If the regional temperature ratio is less than or equal to the standard regional temperature ratio, a regional normal signal is generated;

[0100] It should be noted that the regional temperature ratio indicates the degree of difference between the temperature of the sub-region and the standard temperature. If the regional temperature ratio is too large, it means that the reaction temperature at that location is too high or too low, and the degree of reaction at that location is different from the standard degree of reaction. The rate of product generation will be affected, and more by-products may be produced, affecting the purity of potassium gold cyanide.

[0101] Based on the regional abnormal signal, marking the region generating the regional abnormal signal as a temperature abnormal region;

[0102] Obtain the consumption rate of gold elements in the temperature abnormality area, marked as the regional consumption rate; perform ratio processing on the regional consumption rate and the standard regional consumption rate to obtain the consumption rate ratio;

[0103] The temperature impact value is obtained by summing the ratio of the number of cycles and the ratio of the consumption rate;

[0104] Step 4: Analyze whether the temperature has an impact on the gold consumption rate, compare the temperature impact value with the temperature impact threshold, and generate an impact signal;

[0105] The temperature impact value is compared with the temperature impact threshold. The comparison process is:

[0106] If the temperature impact value is less than or equal to the temperature impact threshold, a non-temperature impact signal is generated;

[0107] If the temperature impact value is greater than the temperature impact threshold, a temperature impact signal is generated;

[0108] The technical solution of the embodiment of the present invention is as follows: the consumption rate of the gold element in the monitoring period is obtained, and it is divided into a number of consumption sub-periods of equal time length for analysis and processing to obtain abnormal consumption sub-periods, and the abnormal consumption sub-periods are processed to obtain abnormal temperature sub-periods; the consumption sub-periods marked as abnormal consumption sub-periods and abnormal temperature sub-periods are analyzed to obtain a ratio of the number of periods; the reaction area is evenly divided into a number of sub-areas according to the area, the temperature of each sub-area is processed to obtain an abnormal temperature area, the consumption rate of the gold element in the abnormal temperature area is analyzed to obtain a consumption rate ratio; the consumption rate ratio and the period are compared. The temperature influence value is obtained by processing the ratio of the number of periods; analyzing whether the temperature affects the gold consumption rate, comparing the temperature influence value with the temperature influence threshold value, and generating an influence signal; the present invention analyzes whether the change in the gold consumption rate is related to the temperature change by monitoring the temperature changes and the gold consumption rate changes in different time intervals and different regions within the cycle, which is beneficial to avoiding the adverse reactions such as abnormal gold consumption rate caused by the reaction temperature change, incomplete reaction, and reduced raw material utilization, thereby reducing losses and improving the economic benefits of production; it is beneficial to reducing the occurrence of side reactions and improving the purity of potassium aurous cyanide.

[0109] Example 3

[0110] like Figure 3 As shown, based on Example 1 and Example 2, a preparation process of potassium gold cyanide described in an embodiment of the present invention comprises:

[0111] Step 5: Obtain the temperature and gold consumption rate of all sub-areas, construct temperature change curves and consumption rate change curves, analyze and process the peak value and trough value parameters of the temperature change curves and the consumption rate change curves, and obtain the consumption rate fluctuation data group; analyze the consumption rate fluctuation data group to obtain the change overlap value;

[0112] Based on the temperature influence signal, the temperature of all sub-areas is obtained, and an XY two-dimensional coordinate system is constructed with time as the X-axis and the temperature of the sub-area as the Y-axis. The temperature of each consumption sub-interval is marked and connected on the XY two-dimensional coordinate system to obtain the temperature change curve of the sub-area;

[0113] Obtain the gold consumption rate of all sub-areas, construct an XY two-dimensional coordinate system with time as the X-axis and the gold consumption rate of the sub-area as the Y-axis, mark and connect the gold consumption rate of each consumption sub-interval on the XY two-dimensional coordinate system, and obtain a consumption rate change curve of the sub-area;

[0114] Get the peak value and trough value of the temperature change curve and the consumption rate change curve respectively, get the time interval from the start time of the cycle to the time of the first peak value / trough value and the time interval from the last peak value / trough value to the end time of the cycle, and the time interval between each peak value and trough value; get the number of peak values ​​and trough values ​​and the corresponding time of the temperature change curve and the consumption rate change curve respectively;

[0115] Processing parameters of the temperature change curve and the consumption rate change curve;

[0116] Compare the number of peak values ​​and trough values ​​of the temperature change curve and the consumption rate change curve to obtain a quantity analysis signal;

[0117] If the number of peak values ​​and trough values ​​of the temperature change curve and the consumption rate change curve is the same, a quantity synchronization signal is generated;

[0118] If the number of peak values ​​and trough values ​​of the temperature change curve and the consumption rate change curve are different, a quantity asynchronous signal is generated, indicating that factors other than temperature affect the consumption rate of gold elements;

[0119] Based on the quantity synchronization signal, the times corresponding to all the peak values ​​and trough values ​​of the temperature change curve and the consumption rate change curve are arranged in chronological order, and all the peak values ​​and trough values ​​are marked with serial numbers according to the arrangement order, and divided into odd groups and even groups according to the parity of the serial numbers;

[0120] It should be noted that the peak values ​​and trough values ​​appear alternately, the parity of all the peak values ​​is the same, and the parity of all the trough values ​​is the same; the parity of all the peak values ​​and trough values ​​is marked according to the arrangement order, that is, all the peak values ​​and trough values ​​are arranged in chronological order, and marked with serial numbers, and the ones with odd serial numbers are grouped into odd groups, and the ones with even serial numbers are grouped into even groups; if the first value to appear is the peak value, then the odd group is all peak values, and the even group is all trough values; if the first value to appear is the trough value, then the odd group is all trough values, and the even group is all peak values;

[0121] Analyze whether the peak values ​​of the temperature change curve and the consumption rate change curve correspond to odd groups or even groups at the same time, and obtain a peak analysis signal;

[0122] If the peak values ​​of the temperature change curve and the consumption rate change curve correspond to the odd-numbered group or the even-numbered group at the same time, a peak synchronization signal is generated;

[0123] If the peak values ​​of the temperature change curve and the consumption rate change curve do not correspond to the odd group or the even group at the same time, a peak asynchronous signal is generated, indicating that factors other than temperature affect the consumption rate of gold elements;

[0124] Based on the peak synchronization signal, the time intervals between all peak values ​​and trough values ​​of the temperature change curve and the time interval between the first peak value / trough value and the start time are obtained, and the obtained data are arranged in chronological order to obtain a temperature fluctuation data group;

[0125] Obtain the time intervals between all peak values ​​and trough values ​​of the consumption rate change curve and the time interval between the first peak value / trough value and the start time, arrange the obtained data in chronological order, and obtain a consumption rate fluctuation data group;

[0126] Perform difference processing on the corresponding data in the temperature fluctuation data group and the consumption rate fluctuation data group to obtain a difference data group; obtain the average value of all the data in the difference data group to obtain the change overlap value;

[0127] It should be noted that based on the quantity synchronization signal, the temperature fluctuation data group obtained by the temperature change curve has the same number of data as the consumption rate fluctuation data group obtained by the consumption rate change curve, and they are arranged in chronological order, and each data in the temperature fluctuation data group has corresponding data in the consumption rate fluctuation data group;

[0128] Step 6: Compare the change overlap value with the change overlap threshold to analyze whether the change in the gold consumption rate is caused by temperature change;

[0129] The obtained change coincidence value is compared with the change coincidence threshold value to obtain an analysis signal;

[0130] If the change coincidence value is greater than the change coincidence threshold, an out-of-sync signal is generated;

[0131] If the change coincidence value is less than or equal to the change coincidence threshold, a synchronization signal is generated;

[0132] It should be noted that the change overlap value indicates the degree of influence of temperature change on the gold consumption rate. If the change overlap value is higher, the degree of influence of temperature change on the gold consumption rate is higher, indicating that the change of gold consumption rate is mainly caused by temperature change; if the change overlap value is lower, the degree of influence of temperature change on the gold consumption rate is lower, indicating that the change of gold consumption rate is not only caused by temperature change, but there are other influencing factors.

[0133] The technical solution of the embodiment of the present invention is: obtaining the temperature and gold consumption rate of all sub-areas, constructing a temperature change curve and a consumption rate change curve, analyzing and processing the peak value and trough value parameters of the temperature change curve and the consumption rate change curve, and obtaining a consumption rate fluctuation data group; then analyzing the consumption rate fluctuation data group to obtain a change overlap value; comparing the change overlap value with the change overlap threshold value to analyze whether the change in the gold consumption rate is caused by a temperature change; the present invention determines whether the main reason for the change in the gold consumption rate is the temperature change by analyzing the temperature change and the gold consumption rate change; it is conducive to analyzing the influencing factors of the change in the gold consumption rate, and controlling the reaction rate by regulating the influencing factors, avoiding the waste of raw materials and the increase of energy consumption, reducing production costs, avoiding side reactions, and improving the purity and production efficiency of potassium aurous cyanide crystals.

[0134] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A preparation process for potassium aurous cyanide, characterized in that: include: Rinse the gold nuggets or electrolytic gold powder with deionized water first, then boil and wash them in dilute nitric acid, drain the nitric acid and rinse them with deionized water again; Add aqua regia in batches. Heat it just after adding it to start the reaction. When the reaction is more intense, stop heating and keep the aqua regia solution at a slight boiling state. When the reaction is relatively slow, add a small amount of aqua regia until most of the gold nuggets or gold powder are dissolved. At the end of the reaction, a small amount of unreacted gold must be present, i.e., an excess of gold must be ensured when feeding; Pour the gold dissolving solution into another beaker, wash the unreacted gold nuggets or gold powder with water, transfer to the next cycle for use, and merge the washing solution into the gold dissolving solution; Heat and drop concentrated hydrochloric acid to remove nitrogen oxides to obtain chloroauric acid solution; Dissolve the blood-red thick substance with deionized water using the high concentration chloroauric acid solution; Slowly add ammonia water under constant stirring to make chloroauric acid generate gold fulminate precipitate; Heat is used to remove excess ammonia, and water is continuously added to prevent the precipitate from drying out; Wash with hot water until there is no chloride ion, and the resulting precipitate is gold fulminate; Put the gold fulminate precipitate together with the filter paper into the KCN solution and slowly heat to dissolve, to obtain a colorless and transparent potassium cyanide gold solution; The obtained potassium cyanogen gold solution is filtered, the filtrate is evaporated, and cooled for crystallization to obtain potassium cyanogen gold crystals; Monitor the consumption rate of gold element during the generation process of potassium cyanogen gold solution, analyze whether the consumption rate of gold element is abnormal, and generate analysis signals; the analysis signals are divided into normal consumption signals and abnormal consumption signals; Based on the abnormal consumption signal, the temperature change in the reaction process is obtained; the influence of the temperature change on the consumption rate of the gold element is analyzed to obtain the temperature influence value; whether the temperature change has an influence on the consumption rate of the gold element is determined, and an influence signal is generated, wherein the influence signal includes a temperature influence signal and a non-temperature influence signal; Based on the temperature influence signal, the change overlap value is obtained; and according to the change overlap value, it is determined whether there are other influencing factors for the abnormal consumption rate of the gold element.

2. A process for preparing potassium gold cyanide according to claim 1, characterized in that: The temperature influence value is obtained as follows: The temperature impact value is obtained by summing the ratio of the number of cycles and the ratio of the consumption rate.

3. A process for preparing potassium gold cyanide according to claim 2, characterized in that: The cycle quantity ratio is obtained as follows: The consumption rate of gold element in the monitoring period is obtained, and it is divided into several consumption sub-periods of equal time length. The consumption rate of gold element in the consumption sub-period is obtained, and the consumption rate of gold element in each consumption sub-period is compared with the gold element consumption threshold. The specific process is as follows: If the gold element consumption rate is less than or equal to the gold element consumption threshold, a normal consumption signal is generated; If the gold element consumption rate is greater than the gold element consumption threshold, an abnormal consumption signal is generated; Marking the consumption sub-cycle corresponding to the abnormal consumption signal as an abnormal consumption sub-cycle, and marking the consumption sub-cycle corresponding to the normal consumption signal as a normal consumption sub-cycle; Based on the abnormal consumption signal, the temperature change data within the detection period is obtained and analyzed to obtain the temperature deviation value; Get the temperature deviation value of each consumption sub-cycle, and compare the temperature deviation value with the temperature deviation threshold. Specifically: If the temperature deviation value is less than or equal to the temperature deviation threshold, a normal signal is generated; If the temperature deviation value is greater than the temperature deviation threshold, an abnormal signal is generated; Mark the consumption sub-period corresponding to the abnormal signal as an abnormal temperature sub-period, and mark the consumption sub-period corresponding to the normal signal as a normal temperature sub-period; The number of consumption sub-cycles marked as abnormal consumption sub-cycles and abnormal temperature sub-cycles is counted and ratioed with the total number of consumption sub-cycles to obtain a cycle number ratio.

4. A process for preparing potassium gold cyanide according to claim 2, characterized in that: The consumption rate ratio is obtained as follows: The reaction area is divided into several sub-areas by area, the temperature of each sub-area is obtained, the temperature of each sub-area is subjected to difference processing with the standard area temperature, and the absolute value is taken to obtain the area temperature difference, the area temperature difference is subjected to ratio processing with the standard area temperature difference to obtain the area temperature ratio, and the area temperature ratio is compared with the standard area temperature ratio, specifically: If the regional temperature ratio is greater than the standard regional temperature ratio, a regional anomaly signal is generated; If the regional temperature ratio is less than or equal to the standard regional temperature ratio, a regional normal signal is generated; Based on the regional abnormal signal, marking the region generating the regional abnormal signal as an abnormal region; The consumption rate of gold elements in the abnormal area is obtained and marked as the regional consumption rate; the regional consumption rate is compared with the standard regional consumption rate to obtain the consumption rate ratio.

5. A process for preparing potassium gold cyanide according to claim 1, characterized in that: The comparison process of the temperature impact value and the temperature impact threshold is as follows: The temperature impact value is compared with the temperature impact threshold. The comparison process is: If the temperature impact value is less than or equal to the temperature impact threshold, a non-temperature impact signal is generated; If the temperature influence value is greater than the temperature influence threshold, a temperature influence signal is generated.

6. A process for preparing potassium gold cyanide according to claim 1, characterized in that: The change overlap value is obtained in the following manner: Based on the peak values ​​of the temperature change curve and the consumption rate change curve corresponding to the odd group or the even group at the same time, the time intervals between all the peak values ​​and the trough values ​​of the temperature change curve and the time interval between the first peak value / trough value and the start time are obtained, and the obtained data are arranged in chronological order to obtain a temperature fluctuation data group; Obtain the time intervals between all peak values ​​and trough values ​​of the consumption rate change curve and the time interval between the first peak value / trough value and the start time, arrange the obtained data in chronological order, and obtain a consumption rate fluctuation data group; Perform difference processing on the corresponding data in the temperature fluctuation data group and the consumption rate fluctuation data group to obtain a difference data group; obtain the average value of all the data in the difference data group to obtain the change overlap value.

7. A process for preparing potassium gold cyanide according to claim 6, characterized in that: The specific process of judging whether the peak values ​​of the temperature change curve and the consumption rate change curve correspond to the odd group or the even group at the same time is as follows: Based on the fact that the temperature change curve and the consumption rate change curve have the same number of peak values ​​and trough values, the times corresponding to all the peak values ​​and trough values ​​of the temperature change curve and the consumption rate change curve are arranged in chronological order, and all the peak values ​​and trough values ​​are marked with serial numbers according to the arrangement order, and are divided into odd groups and even groups according to the parity of the serial numbers. Analyze whether the peak values ​​of the temperature change curve and the consumption rate change curve correspond to odd groups or even groups at the same time, and obtain a peak analysis signal; If the peak values ​​of the temperature change curve and the consumption rate change curve correspond to the odd-numbered group or the even-numbered group at the same time, a peak synchronization signal is generated; If the peak values ​​of the temperature change curve and the consumption rate change curve do not correspond to the odd-numbered group or the even-numbered group at the same time, a peak asynchronous signal is generated.

8. A process for preparing potassium gold cyanide according to claim 7, characterized in that: The process of judging whether the number of peak values ​​and trough values ​​of the temperature change curve and the consumption rate change curve is the same is as follows: Get the peak value and trough value of the temperature change curve and the consumption rate change curve respectively, get the time interval from the start time of the cycle to the time of the first peak value / trough value and the time interval from the last peak value / trough value to the end time of the cycle, and the time interval between each peak value and trough value; get the number of peak values ​​and trough values ​​and the corresponding time of the temperature change curve and the consumption rate change curve respectively; Processing parameters of the temperature change curve and the consumption rate change curve; Compare the number of peak values ​​and trough values ​​of the temperature change curve and the consumption rate change curve to obtain a quantity analysis signal; If the number of peak values ​​and trough values ​​of the temperature change curve and the consumption rate change curve is the same, a quantity synchronization signal is generated; If the number of peak values ​​and trough values ​​of the temperature change curve and the consumption rate change curve are different, a quantity asynchronous signal is generated.

9. A process for preparing potassium gold cyanide according to claim 8, characterized in that: The temperature change curve and the consumption rate change curve are obtained as follows: Based on the temperature influence signal, the temperature of all sub-areas is obtained, and an XY two-dimensional coordinate system is constructed with time as the X-axis and the temperature of the sub-area as the Y-axis. The temperature of each consumption sub-interval is marked and connected on the XY two-dimensional coordinate system to obtain the temperature change curve of the sub-area; The gold consumption rates of all sub-areas are obtained, and an XY two-dimensional coordinate system is constructed with time as the X-axis and the gold consumption rate of the sub-area as the Y-axis. The gold consumption rate of each consumption sub-interval is marked and connected on the XY two-dimensional coordinate system to obtain the consumption rate change curve of the sub-area.

10. A process for preparing potassium gold cyanide according to claim 1, characterized in that: The comparison process of the change coincidence value and the change coincidence threshold is: The obtained change coincidence value is compared with the change coincidence threshold value to obtain an analysis signal; If the change coincidence value is greater than the change coincidence threshold, an out-of-sync signal is generated; If the change coincidence value is less than or equal to the change coincidence threshold, a synchronization signal is generated.

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