A production and preparation process of synthetic mica

Abstract

This application relates to the technical field of synthetic mica, and specifically relates to a production and preparation process of synthetic mica. The process includes: preparing materials for the preparation of synthetic mica according to weight percentage ratios and stirring and mixing them; wherein the materials include fused magnesia, potassium fluorosilicate, potassium feldspar, and calcined kaolin; setting a temperature measuring device in a high-temperature furnace to collect the material temperature data at the temperature measuring point during the melting process; filling the mixed materials into the high-temperature furnace; melting the mixed materials in the furnace body; during the melting process, adjusting the height of the graphite electrode according to the change of the material temperature; stopping the power supply after melting is completed to allow the materials inside the furnace body to cool and crystallize naturally; opening the furnace and discharging the materials to obtain synthetic mica. This application aims to measure the temperature at different heights during the melting process of synthetic mica, analyze the characteristics of temperature changes to adjust the up and down movement of the graphite electrode, and ensure uniform heating of the materials.

Description

Technical Field

[0001] The present application relates to the technical field of artificial synthetic mica, and in particular to a production and preparation process of artificial synthetic mica. Background Art

[0002] Mica is a general term for layered silicate minerals containing a variety of metal elements. From the perspective of structure and composition, it is mainly aluminosilicates of alkaline earth metals and alkali metals with a monoclinic complex network layered structure. Mica is widely used in aerospace, electrical appliances, machinery, pearlescent effect materials and other fields due to its good elasticity, transparency, high-frequency insulation and chemical stability. However, the demand for high-quality natural mica in my country has been rising year by year, and imported natural mica is far from meeting the domestic market demand. Compared with natural mica, synthetic mica is less restricted by natural conditions, and its structure is similar to that of natural mica. Its purity, transparency, insulation and high temperature resistance are better than natural mica. Therefore, it can completely replace or even surpass natural mica in some industrial applications.

[0003] The synthesis process of mica can be mainly divided into the crucible descending seed method and the internal heat method. Among them, although the crucible descending seed method can prepare large book-shaped crystals, it has high production costs due to its high energy consumption, long cycle and the need for expensive platinum crucibles, so it is less used in large-scale industrial production. The internal heat method has the advantages of low energy consumption, high yield, low fluoride volatilization, and does not require a crucible. Therefore, this method has been widely studied as the main method for large-scale synthesis and production of mica. The Chinese patent "CN102951654B Production process of artificial synthetic mica" mentioned that the existing internal heat method can basically meet the product requirements, but the heat conduction method used in the process of synthesizing mica is tip discharge, using the method of pre-buried graphite electrodes. After power is turned on, the uppermost position of the material first melts, and then the heat is conducted from the furnace through the material to the radial and vertical directions of the plane. Therefore, the overall thermal balance of the furnace temperature is very slow, and the material at the bottom of the furnace melts slowly because it is heated slowly, and the overall material is heated unevenly, which leads to a decrease in the production quality of the product.

[0004] To address the above problems, traditional methods usually use a liftable graphite electrode to make the concentrated heat-generating part of the graphite electrode closer to the unmelted material and improve the heat utilization rate. However, this method still cannot better guarantee the uniform heating of the material at different heights and the heating and insulation time, which in turn affects the production quality of artificial synthetic mica. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a production and preparation process of artificial synthetic mica to solve the existing problems.

[0006] A production and preparation process of synthetic mica in this application adopts the following technical solution:

[0007] An embodiment of this application provides a production and preparation process of synthetic mica, and this process includes the following steps:

[0008] S1: Weigh the materials for preparing synthetic mica according to weight percentages and stir and mix them; the materials include fused magnesite, potassium fluorosilicate, potassium feldspar, and calcined kaolin.

[0009] S2: Set a temperature measuring device in a high-temperature furnace to collect the temperature data of the materials at the temperature measuring points during the melting process.

[0010] S3: Fill the mixed materials into the high-temperature furnace.

[0011] S4: Melt the mixed materials in the furnace body.

[0012] S5: During the melting process, according to the change of the material temperature, adjust the height of the graphite electrode according to the following steps:

[0013] (1) Predict the temperature of the materials at each temperature measuring point for the next N moments; take the edit distance between the predicted temperatures of any two temperature measuring points at the same height as the difference measure; take the average value of all difference measure results at the same height as the temperature trend outlier.

[0014] (2) Analyze the heating trend of the temperature data collected at each temperature measuring point, and calculate the average heating trend value at all temperature measuring points at the same height; sum the differences between the average heating trend values at different heights as the heating outlier.

[0015] (3) Take the reciprocal of the sum of the above temperature trend outlier and the heating outlier as the uniformity value of the material temperature at the corresponding height.

[0016] (4) Combine the average difference of the temperature change speeds between all temperature measuring points at the same height and the average difference of the first temperature rise moments to determine the heat uniformity value at the corresponding height.

[0017] (5) Use the temperature uniformity value and the heat uniformity value to adjust the position height of the graphite electrode.

[0018] S6: After the melting is completed, stop the power supply and let the materials inside the furnace cool and crystallize naturally.

[0019] S7: Open the furnace to discharge the materials and obtain synthetic mica.

[0020] Preferably, in step S1, the weight percentages of the materials are as follows: fused magnesia 30% - 32%, potassium fluorosilicate 20% - 21%, potassium feldspar 16 - 20%, and calcined kaolin 27% - 30%.

[0021] Preferably, in step S2, on the inner side of the high - temperature kiln furnace, temperature measurement points are set at different preset lengths at intervals horizontally and vertically respectively. An S - type thermocouple is set at each temperature measurement point, and the temperature inside the kiln furnace is measured every preset time T; among them, the number of temperature measurement points at the same height is not less than 4, and there are more than two different heights.

[0022] Preferably, in step S3, before filling the mixed materials into the high - temperature kiln furnace, a layer of recycled materials is filled in advance on the inner side of the high - temperature kiln furnace.

[0023] Preferably, in step S4, during the melting process, the mixed materials in the furnace body are heated through graphite electrode plates.

[0024] Preferably, in step (4) of step S5, the heat uniformity value at the corresponding height is determined by the reciprocal of the sum of two difference means calculated at the corresponding height.

[0025] Preferably, in step (4) of step S5, the temperature change rate of the temperature measurement point is determined by the ratio of the temperature difference between the current moment and the previous moment to the acquisition time interval.

[0026] Preferably, in step (4) of step S5, the first temperature rise moment of the temperature measurement point is the previous acquisition moment with the most temperature rise between acquisition moments among all acquisition moments of this temperature measurement point.

[0027] Preferably, the method for adjusting the position height of the graphite electrode using the temperature uniformity value and the heat uniformity value includes:

[0028] Calculate the sum value of the temperature uniformity value and the heat uniformity value at each height as the movable parameter of the graphite electrode at the corresponding height, and obtain its threshold value by combining the cross - validation method for the movable parameters of the graphite electrode at all heights;

[0029] When the movable parameter of the motor is greater than or equal to the above - mentioned threshold value, the graphite electrode drive motor control system issues a graphite electrode movement instruction;

[0030] Conversely, keep the height of the graphite electrode and continue heating.

[0031] Preferably, when the materials inside the furnace body in step S6 are naturally cooled and crystallized, a layer of recycled materials with a uniform thickness is added to the furnace surface; when the surface temperature of the furnace body is lower than 50 °C, the furnace is opened for discharging materials.

[0032] Beneficial effects: In the above solution, the present application measures the temperature at different heights during the melting process of artificial synthetic mica, analyzes the characteristics of temperature changes, obtains evaluation parameters for the heating conditions of the materials inside the furnace, and thus solves the problem of deviation in the judgment of the uniform heating of the materials due to the difference in heat transfer speed and the time delay of temperature measurement during the melting process of artificial synthetic mica. By accurately determining the uniform heating condition of the materials inside the furnace and adjusting and controlling the height of the graphite electrode using the drive motor control system according to the judgment result, the present application solves the problem that when using a liftable graphite electrode for the melting of artificial synthetic mica, the adjustment of the height of the graphite electrode does not consider the heating condition of the mica materials, resulting in uneven heating of the mica materials inside the furnace, and thus improves the production quality of artificial synthetic mica. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is a process flow diagram for the production and preparation of an artificial synthetic mica provided by the present application;

[0035] Figure 2 It is a method flow diagram for adjusting the height of the graphite electrode according to the temperature change of the material provided by the present application. Detailed Embodiments

[0036] In order to further elaborate on the technical means and effects adopted by the present application to achieve the intended invention purpose, the following, in combination with the drawings and preferred embodiments, details the specific embodiments, structures, features, and effects of a production and preparation process of artificial synthetic mica proposed according to the present application. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art belonging to the technical field of the present application.

[0038] To solve the problem of uneven heating of mica materials during the melting process, it is necessary to measure and monitor the temperature of the materials in the high-temperature kiln. During the heating process, since the heat source is the tip discharge of the graphite electrode, the first position where the materials in the furnace are heated is the center of the top of the materials. And as the heating progresses, the heat diffuses from the middle to the surrounding and from the top to the bottom. Since the materials are a mixture, there may be certain differences in the heat transfer rate. Therefore, there will be a certain delay when measuring the temperature of the materials, that is, when the heat is transferred to the surrounding, the heat in the middle has far exceeded the heat in the surrounding. If the temperature of the materials at the center of the furnace is judged based on the actually measured temperature, it may lead to a deviation in the judgment of the actual temperature of the materials due to the measurement delay, ultimately affecting the production quality of synthetic mica.

[0039] Accordingly, the process flow chart of a production preparation process of synthetic mica provided by this application is as shown in the appendix Figure 1 as follows, and the specific preparation process is as follows:

[0040] S1: Weigh the materials for preparing synthetic mica according to the weight percentage ratio and stir and mix them; the materials include fused magnesia, potassium fluorosilicate, potassium feldspar, and calcined kaolin.

[0041] Use the following materials with weight percentages to prepare synthetic mica: 30% - 32% of fused magnesia, 20% - 21% of potassium fluorosilicate, 16 - 20% of potassium feldspar, and 27% - 30% of calcined kaolin. And put the prepared materials into a blender and stir for 15 - 45 minutes.

[0042] Among them, in Example 1, the materials for preparing synthetic mica and their weight percentages are respectively: 30% of fused magnesia, 20% of potassium fluorosilicate, 19% of potassium feldspar, and 30% of calcined kaolin.

[0043] In Example 2, the materials for preparing synthetic mica and their weight percentages are respectively: 31% of fused magnesia, 21% of potassium fluorosilicate, 17% of potassium feldspar, and 28% of calcined kaolin.

[0044] In Example 3, the materials for preparing synthetic mica and their weight percentages are respectively: 32% of fused magnesia, 20% of potassium fluorosilicate, 16% of potassium feldspar, and 27% of calcined kaolin.

[0045] It should be noted that usually, massive potassium feldspar needs to be sorted and crushed to obtain potassium feldspar particles with a particle size of less than 40 mesh, which are used as the materials in this example. Potassium feldspar mainly introduces , , and other components.

[0046] In addition, the above-mentioned calcined kaolin is obtained by calcining kaolin at a temperature of 950 - 1150 °C for 0.5 hours, and then through pulverization, calcined kaolin particles with a particle size below 40 mesh are obtained, which are used as the materials in this application. The purpose of introducing calcined kaolin is to remove the crystal water and organic impurities in kaolin. The calcined kaolin mainly introduces , and a small amount of .

[0047] S2: Set a temperature measuring device in the high-temperature furnace to collect the material temperature data at the temperature measuring points during the melting process.

[0048] In the above-mentioned high-temperature furnace, around the inner side of the furnace, temperature measuring points are set at different preset lengths horizontally and vertically respectively. An S-type thermocouple is set at each temperature measuring point, and the temperature inside the furnace is measured every preset time T. In this embodiment, a temperature measuring point is set every 80 cm horizontally and every 50 cm vertically, and the temperature inside the furnace is measured every 5 minutes.

[0049] It should be noted that the setting interval of the temperature measuring points and the temperature measuring interval time are not unique. The implementer can consider factors such as the size of the high-temperature furnace used in actual synthetic mica and the total amount of synthetic mica materials. And ensure that there are greater than or equal to 4 temperature measuring points at the same height and temperature measuring points at different heights to ensure the comprehensiveness of the material temperature measurement. That is, at least the material temperatures at two heights need to be measured, and there are at least 4 temperature measuring points at each height.

[0050] S3: Fill the mixed materials into the high-temperature furnace.

[0051] First, fill a layer of recycled materials on the inner side of the high-temperature furnace. The recycled materials are materials formed by heating and melting the materials close to the furnace wall or are composed of previously unreacted materials. Then fill the mixed materials prepared in step S1 into the high-temperature furnace.

[0052] S4: Melt the mixed materials in the furnace body.

[0053] During the melting process, a 10KV power supply is used. The power supply is connected to a circuit breaker and a transformer in sequence. The output power range of the transformer used is 400 - 600 KVA. Three groups of AC power supplies of 380V, 220V, and 110V are output by the transformer. The three groups of power supplies output by the transformer are connected to three switch cabinets one by one. The three switch cabinets are then connected to the control cabinet. The power supply output from the control cabinet is connected to three graphite electrode plates to heat the mixed materials in the furnace body.

[0054] The melting process successively includes:

[0055] Arc starting: Connect the electrode to the 380V AC power supply, and gradually increase the input power from zero to 120KW. The duration is 40 - 60 minutes.

[0056] After arc starting, disconnect the electrode from the 380V AC power supply and connect it to the 220V AC power supply, and gradually increase the input power from 120KW to 260KW.

[0057] When the input power reaches 260KW, disconnect the electrode from the 220V AC power supply and connect it to the 110V AC power supply, and gradually increase the input power from 260KW to 400KW.

[0058] During the melting process when the electrode is connected to the 220V AC power supply and the 110V AC power supply, whenever the furnace surface subsides, add the mixed material to the furnace surface, and control the molten liquid temperature between 1400℃ and 1600℃.

[0059] Heat preservation: When all the added mixed material is melted, add a layer of recycled material with a uniform thickness to the furnace surface and enter the heat preservation stage. At this time, with the electrode connected to the 110V AC power supply, gradually reduce the input power from 400KW to 80KW.

[0060] S5: During the melting process, according to the change of the material temperature, adjust the height of the graphite electrode according to the following steps.

[0061] Under normal circumstances, when the material at the same height in the furnace reaches its melting temperature, there is no need to continue heating, but let it be in the heat preservation state until it is completely melted. At this time, the graphite electrode can be displaced downward, so that the lower-layer material receives more heat for melting. However, due to the delay problem of temperature measurement, when the measured temperature of the surrounding materials reaches the melting temperature, the temperature of the material in the central area may have far exceeded the melting temperature due to continuous heating, which may lead to serious overheating of the melt and more fluoride loss. Therefore, it is necessary to predict and analyze the temperature of the material, and then displace the graphite electrode downward in advance on the premise of ensuring that the material at the current height can reach the melting temperature and be heat-preserved.

[0062] For the material at the same height, as the heating progresses, the temperature diffusion speed and the temperature rise data are relatively similar. Therefore, the data collected by the thermocouples at the same height on the inner side of the high-temperature kiln furnace generally first gradually increase and then gradually tend to be stable. If the temperature change difference of the material at the same height is small and the temperature change trend conforms to the temperature change of the normal melting process, it means that the heating of the material is normal and it will reach the melting temperature within the expected time; on the contrary, if the temperature change difference of the materials at each place is large and the temperature change trend is quite different from the temperature change of the normal melting process, it means that there may be an uneven heating situation of the material at this time and a certain degree of heating is still required.

[0063] Accordingly, during the melting process in step S4, the method flow chart for adjusting the height of the graphite electrode according to the change of the material temperature is as shown in the appendix Figure 2 and specifically includes:

[0064] (1) Perform temperature prediction for the temperature data collected at each temperature measurement point for the next N moments; take the edit distance between the predicted temperatures of any two temperature measurement points at the same height as the difference measure; take the average value of all difference measure results at the same height as the temperature trend outlier;

[0065] To characterize the temperature change of the above-mentioned material, in this application, first take the material temperature at a certain height as an example, combine the temperature values of each temperature measurement point with the prediction algorithm for prediction respectively, and the prediction result is the temperature data for the next N moments after the current temperature sampling moment. In this embodiment, the ARIMA model is used to predict the temperature data, and other suitable algorithms such as the exponential smoothing method can also be used in other embodiments. N in this embodiment is taken as 50. If insufficient data cannot be obtained, no processing will be performed. In addition, the implementer can select other values under the condition of ensuring to avoid data contingency.

[0066] Subsequently, perform a difference comparison on the predicted temperatures of any two temperature measurement points at the same height. In this application, the edit distance is used as the difference measure method between the predicted temperatures of the temperature measurement points. The implementer can use other difference measure methods on the premise of ensuring the accuracy of the difference comparison, such as the Euclidean distance, the reciprocal of the Pearson correlation coefficient, etc.

[0067] Finally, take the average value of all difference measure results at this height as a measure of the approximate temperature trend of the temperature measurement points at this height at the current moment, and use it as the temperature trend outlier at this height at the current moment.

[0068] (2) Analyze the temperature rising trend of the temperature data collected at each temperature measurement point, and calculate the average value of the temperature rising trends at all temperature measurement points at the same height; sum the differences between the average values of the temperature rising trends at different heights as the temperature rising outlier;

[0069] In addition, since the position of the graphite electrode is constantly moving downwards, the heat transfer of the material at each height is from the middle to the surrounding, so the temperature change trends of the material at each height are relatively similar.

[0070] Accordingly, for the temperatures collected at each temperature measurement point at each height, use the trend analysis algorithm to analyze the temperature rising trend of each temperature measurement point, calculate the average value of the temperature rising trends at all temperature measurement points at the same height, and sum the differences between the average values of the temperature rising trends at different heights as the temperature rising outlier for measuring the degree of temperature rising trend abnormality.

[0071] In this embodiment, the STL decomposition algorithm in the well-known technology is used to perform trend analysis on the temperature, and the specific process will not be elaborated. At the same time, in this embodiment, the difference between the mean values of the heating trends at different heights is the absolute difference between the mean values of the heating trends at different heights.

[0072] (3) Take the reciprocal of the sum value of the above temperature trend outliers and heating outliers as the uniformity value of the material temperature at the corresponding height.

[0073] Further, take the reciprocal of the sum result of the above temperature trend outliers and heating outliers as the uniformity value of the material temperature at the current moment and current height, which is used to measure whether there is an abnormal situation in the melting and heating of the material in the current furnace, whether the temperature of the material is uniform, and further can be used as a control parameter for the height of the graphite electrode, providing parameter support for the adjustment of the height of the graphite electrode.

[0074] (4) Combine the mean value of the difference in the temperature change speed between all temperature measurement points at the same height and the mean value of the difference at the first temperature rise moment to determine the heat uniformity value at the corresponding height.

[0075] Usually, there are certain differences in the structures of the high-temperature kilns used for artificial synthesis of mica. The tops of some high-temperature kilns are narrower, and the widths of the middle and lower parts are wider. Some high-temperature kilns are narrow in the upper and lower parts and wide in the middle. These designs are all to improve the utilization rate and efficiency of the heating heat. However, such designs will also result in less material being accommodated in the narrower parts. Therefore, the time required for the heat to transfer from the middle to the surroundings during the heating process is less. As a result, the overall heating rate of the material in the narrower area of the kiln is faster, the heat required is less, and the graphite electrode needs to stay for less time. At this time, there is a large difference in the heating trend of the material temperature between the narrower part and the wider part. The uniformity value of the material temperature calculated after analysis only by the method in step (3) is relatively low, and thus there may be a deviation in the judgment of the uniformity of the material temperature. Therefore, further correction is needed.

[0076] For the materials at the same height, under the condition of normal heat transfer, the heating rates of the materials at each place are balanced and similar, and the moments when the temperature rises are also relatively close. After the normal heat transfer is completed, the heating conditions of the materials at this height are relatively uniform.

[0077] According to the analysis of the above temperature rise, for each temperature measurement point at the same height, obtain the temperature change rate of any temperature measurement point. The calculation method is the ratio of the temperature difference between the current moment and the previous moment of this temperature measurement point to the acquisition time interval. And obtain the first temperature rise moment of the temperature measurement point. The calculation method is the previous acquisition moment with the largest temperature rise between acquisition moments among all acquisition moments of this temperature measurement point. For example: among all acquisition moments of this temperature measurement point, if the temperature rise between the (u - 1)-th moment and the u-th moment is the largest, then the (u - 1)-th moment is taken as the first temperature rise moment of this temperature measurement point.

[0078] Then calculate the difference in temperature change rates between any two temperature measurement points, and the difference in the first temperature rise moments; finally, sum the average value of the differences in all temperature change rates and the average value of the differences in the first temperature rise moments, and take the reciprocal of this summation result as an evaluation parameter for measuring the uniformity of material heating at the same height, denoted as the heat uniformity value.

[0079] Among them, the difference in temperature change rates and the difference in the first temperature rise moments are respectively the absolute difference in temperature change rates between any two temperature measurement points and the absolute difference in the first temperature rise moments between any two temperature measurement points.

[0080] The above heat uniformity value can be used to measure whether the material heating at each current height is uniform, and thus can be used as a height control parameter for the graphite electrode, providing parameter support for the adjustment of the graphite electrode height.

[0081] (5) Use the temperature uniformity value and the heat uniformity value to adjust the position height of the graphite electrode.

[0082] In the graphite electrode drive motor control system, according to the actually collected temperature conditions, calculate the temperature uniformity value and the heat uniformity value at each height, and take the sum of the two as the movable parameter of the graphite electrode at the current height. And obtain its threshold value by combining the cross-validation method for the movable parameters of the graphite electrode at all heights. The cross-validation method is a well-known technology and will not be elaborated in this application.

[0083] When the material heating at the current height in the furnace is more uniform, the calculated motor movable parameter is larger, indicating that the material in the furnace is heated more evenly at this time. That is, when the motor movable parameter is greater than or equal to the above threshold value, the graphite electrode drive motor control system issues a graphite electrode movement instruction. After receiving the movement instruction, the motor controller issues a control signal, and the driver converts the control signal issued by the controller into the voltage and current signals required by the motor. Finally, the actuator controls the motor to rotate according to the voltage and current signals, thereby realizing the downward movement of the graphite electrode.

[0084] Conversely, when the movable parameter of the motor is less than the above threshold value, it indicates that the heating of the material at the current height is not completed, and the height of the graphite electrode still needs to be maintained to continue heating; therefore, the motor is controlled to stop rotating, and the height of the current graphite electrode is maintained to continue heating the material.

[0085] S6: After the melting is completed, the power supply is stopped, and the material inside the furnace body is naturally cooled and crystallized.

[0086] After the power outage, the input power drops to zero, and the drive motor control system issues a motor withdrawal instruction, setting the upward movement height of the graphite electrode to exceed the height of the high-temperature kiln. The motor controller, driver, and actuator control the motor to reverse according to the control signal to withdraw the graphite electrode from the kiln. The material inside the furnace body starts to cool and crystallize automatically. During the natural cooling and crystallization process, a layer of return material with a uniform thickness can be added on the furnace surface as a heat-insulating layer to extend the cooling time of the material inside the furnace body.

[0087] S7: Open the furnace to discharge the material to obtain synthetic mica.

[0088] When the surface temperature of the furnace body is lower than 50°C, remove the unburned powder, return material and other heat-insulating materials, and use methods such as punching and pick-breaking to take out the synthetic mica, and then crush, screen, package, and store the mica to complete the production preparation process of a kind of synthetic mica.

[0089] Each embodiment in this application is described in a progressive manner. The same or similar parts between each embodiment can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0090] It should be noted that unless otherwise specified and limited, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a circuit structure, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the article or device including the element. In addition, the term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0091] Those skilled in the art will readily think of other implementation schemes of this application after considering the specification and practicing the invention here. This application is intended to cover any variations, uses or adaptations of this application, which follow the general principles of this application and include the common general knowledge or conventional technical means in the technical field not invented by this application.

[0092] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A production process for synthetic mica, characterized in that: The following steps are involved: S1: mixing materials for preparing synthetic mica according to weight percentage and stirring and mixing; in Materials include: fused magnesia, potassium fluorosilicate, potassium feldspar and calcined kaolin; S2: A temperature measuring device is installed in the high-temperature kiln to collect material temperature data at the temperature measuring points during the melting process; S3: Filling the mixed material into a high temperature kiln; S4: Melting the mixed material in the furnace body; S5: During the melting process, adjust the height of the graphite electrode according to the temperature change of the material according to the following steps: (1) The temperature data collected at each temperature measurement point is used to predict the temperature at N future moments. The edit distance between the predicted temperatures of any two temperature measurement points at the same height is used as the difference measure. The mean of all difference measure results at the same height is used as the temperature trend anomaly. (2) Analyze the temperature rise trend of the temperature data collected at each temperature measurement point, calculate the average temperature rise trend of all temperature measurement points at the same height; sum the differences between the average temperature rise trends at different heights as the temperature rise anomaly; (3) The reciprocal of the sum of the above-mentioned temperature trend abnormal value and the temperature rise abnormal value is taken as the uniform value of the material temperature at the corresponding height; (4) Determine the heat average value at the corresponding height by combining the mean difference of the temperature change rate between all temperature measurement points at the same height and the mean difference of the first temperature rise time; (5) Use the temperature uniformity value and heat uniformity value to adjust the position height of the graphite electrode; S6: After melting is completed, the power supply is stopped to allow the material inside the furnace to cool and crystallize naturally; S7: Open the furnace and discharge the material to obtain artificial synthetic mica.

2. The production process of artificial synthetic mica according to claim 1, characterized in that: In step S1, the weight percentages of the materials are: 30% to 32% of fused magnesia, 20% to 21% of potassium fluorosilicate, 16% to 20% of potassium feldspar, and 27% to 30% of calcined kaolin.

3. The production process of artificial synthetic mica according to claim 1, characterized in that: In step S2, temperature measuring points are set at different preset lengths in the horizontal and vertical directions on the inner side of the high-temperature kiln, an S-type thermocouple is set at each temperature measuring point, and the temperature in the kiln is measured once at a preset time interval T; wherein the number of temperature measuring points at the same height is not less than 4, and there are more than two different heights.

4. The process for producing artificial synthetic mica according to claim 1, characterized in that: In step S3, before the mixed material is charged into the high temperature kiln, a layer of recycled material is preliminarily charged into the inner side of the high temperature kiln.

5. The production process of artificial synthetic mica according to claim 1, characterized in that: In step S4, the mixed material in the furnace is heated by the graphite electrode plate during the melting process.

6. The process for producing artificial synthetic mica according to claim 1, characterized in that: In step (4) of step S5, the heat average value at the corresponding height is determined by the reciprocal of the sum of the two difference means calculated at the corresponding height.

7. The process for producing artificial synthetic mica according to claim 6, characterized in that: In step (4) of step S5, the temperature change rate of the temperature measuring point is determined by the ratio of the temperature difference between the current moment and the previous moment and the acquisition time interval.

8. The process for producing artificial synthetic mica according to claim 6, characterized in that: In step (4) of step S5, the first temperature rise moment of the temperature measuring point is the previous collection moment with the largest temperature rise between collection moments among all collection moments of the temperature measuring point.

9. The process for producing artificial synthetic mica according to claim 1, characterized in that: The method of adjusting the position height of the graphite electrode by using the temperature uniformity value and the heat uniformity value includes: The sum of the temperature uniformity value and the heat uniformity value at each height is calculated as the movable parameter of the graphite electrode at the corresponding height, and the threshold value of the movable parameters of the graphite electrode at all heights is obtained by combining the cross-validation method; When the motor movable parameter is greater than or equal to the above threshold, the graphite electrode drive motor control system issues a graphite electrode movement instruction; On the contrary, the height of the graphite electrode is maintained to continue heating.

10. The process for producing artificial synthetic mica according to claim 1, characterized in that: In step S6, when the material inside the furnace body is naturally cooled and crystallized, a layer of recycled material with uniform thickness is added to the furnace surface; when the surface temperature of the furnace body is lower than 50° C., the furnace is opened and the material is discharged.

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