CN115487924B - Method for preparing high-purity superfine silica micropowder from quartz powder - Google Patents
Method for preparing high-purity superfine silica micropowder from quartz powder Download PDFInfo
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- CN115487924B CN115487924B CN202211294910.6A CN202211294910A CN115487924B CN 115487924 B CN115487924 B CN 115487924B CN 202211294910 A CN202211294910 A CN 202211294910A CN 115487924 B CN115487924 B CN 115487924B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/1835—Discharging devices combined with sorting or separating of material
- B02C17/185—Discharging devices combined with sorting or separating of material with more than one separator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
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- Food Science & Technology (AREA)
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Abstract
The invention relates to a method for preparing high-purity superfine silica powder from quartz powder, which comprises the following steps of obtaining fine quartz powder, and carrying out primary magnetic separation on the fine quartz powder, wherein the magnetic separation time is T 1 The magnetic field strength is N 1 Primarily removing magnetic minerals contained in the powder particles; feeding the quartz powder subjected to magnetic separation into a non-ore ball mill for primary ball milling, wherein the primary ball milling time is t 1 The diameter range of the powder particles screened by the classifier after the primary ball milling is smaller than a 1 Is a primary quartz powder; carrying out secondary magnetic separation on the primary quartz powder, wherein the secondary magnetic separation time is T 2 The magnetic field strength is N 2 The method comprises the steps of carrying out a first treatment on the surface of the Repeating the magnetic separation and ball milling steps until the diameter range of the obtained powder meets the fineness threshold a n And the magnetic separation prediction result meets a threshold value.
Description
Technical Field
The invention relates to a method for preparing high-purity superfine silica micropowder from quartz powder.
Background
In the prior art, the purity and fineness of the silicon micropowder are difficult to meet the use requirements, the quality control parameters are not accurately controlled in the main production process, as in the method for preparing the TFT-LCD silicon micropowder by using the gangue tailing, disclosed in patent CN107032600B, the core of the patent comprehensively utilizes the gangue tailing, and the chemical index and the granularity grading of the TFT-LCD silicon micropowder meet the requirements through a series of steps of size mixing, flotation, chemical removal, cleaning, dehydration, drying, magnetic separation, ball milling and grading in sequence.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a method for preparing high-purity superfine silica powder from quartz powder.
The technical scheme adopted for solving the technical problems is as follows: a method for preparing high-purity superfine silica powder from quartz powder comprises the following steps:
s1, obtaining fine quartz powder, and carrying out primary magnetic separation on the fine quartz powder, wherein the magnetic separation time is T 1 The magnetic field strength is N 1 Primarily removing magnetic minerals contained in the powder particles;
s2, feeding the quartz powder subjected to magnetic separation into a non-ore ball mill for primary ball milling, wherein the primary ball milling time is t 1 The diameter range of the powder particles screened by the classifier after the primary ball milling is smaller than a 1 Is a primary quartz powder; carrying out secondary magnetic separation on the primary quartz powder, wherein the secondary magnetic separation time is T 2 The magnetic field strength is N 2 ；
S3, conveying the quartz powder subjected to secondary magnetic separation into a non-ore ball mill again for secondary ball milling, wherein the secondary ball milling time is t 2 The diameter range of the powder particles screened by a classifier after secondary ball milling is a 2 Secondary quartz powder of (a); carrying out three times of magnetic separation on the secondary quartz powder, wherein the time of the three times of magnetic separation is t 3 The magnetic field strength is N 3 The method comprises the steps of carrying out a first treatment on the surface of the Repeating the magnetic separation and ball milling steps until the diameter range of the obtained powder meets the fineness threshold a n And the magnetic separation prediction result meets a threshold value.
Further, the magnetic mineral includes a ferromagnetic mineral.
Further, judging whether the predicted magnetic separation result meets a threshold value, specifically, repeating the magnetic separation and ball milling steps for n-1 times and the ball milling steps for n-1 times in total, and counting the time T of the ith-1 times in the ith-1 times of magnetic separation i-1 Magnetic field strength N of ith-1 st magnetic separation i-1 Adding a permanent magnet block in the ith ball milling process, counting the weight change of the permanent magnet block in the ith ball milling process in the calibration time, taking the weight change of the permanent magnet block in the ith ball milling process in the calibration time as a dependent variable, and taking the time T of the ith-1 magnetic separation in the ith-1 magnetic selection i-1 Magnetic field strength N of ith-1 st magnetic separation i-1 Establishing a ternary function relation about two independent variables and one dependent variable as independent variables, setting different weights and biases for the two independent variables in the ternary function relation, wherein i is less than or equal to n, and then expanding the statistical range, namely modifying the numerical value of i to obtain the three-dimensional dataAdding data, and optimizing and training the weight and the bias in the ternary function relation until a ternary function relation with converged parameters is obtained; time T of jth-1 magnetic separation in jth-1 magnetic selection j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 And inputting the two quantities as independent variables into a ternary function relation converged by the parameters, outputting the variation of the weight of the permanent magnet in the j-th ball milling process in the calibration time, and if the variation of the weight of the permanent magnet in the calibration time meets a threshold value, determining that the magnetic separation prediction result meets the threshold value, wherein j is less than or equal to n.
Further, whether the magnetic separation prediction result obtained through the ternary function relation of parameter convergence in the magnetic process meets the parameter of the threshold value reverse adjustment magnetic process is obtained.
Further, whether the magnetic separation prediction result obtained through the ternary function relation of parameter convergence in the magnetic process meets the parameter of the threshold reverse adjustment magnetic separation process or not, specifically, the time T of the j-1 th magnetic separation in the j-1 th magnetic separation j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 The two quantities are used as independent variables to input the ternary function relation of parameter convergence to output the variation quantity of the weight of the permanent magnet in the process of the jth ball milling in the calibration time, and then the jth-1 magnetic separation time T of the jth-1 magnetic selection is established in a statistics mode j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 The second type ternary function relation of the weight change amount of the permanent magnet in the jth ball milling process in relation to the weight change amount of the permanent magnet in the calibration time is reversely deduced according to the second type ternary function relation, and the jth-1 magnetic separation time T of the jth-1 magnetic selection corresponds to the time when the weight change amount of the permanent magnet in the jth ball milling process in relation to the ideal weight change amount in the calibration time is reached j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 Incremental combination of two quantities, the time T of the j-1 magnetic separation in the j-1 magnetic selection of the reverse pushing j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 Time T of j-1 magnetic separation of j-1 magnetic selections corresponding to incremental combination calculation of two quantities j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 The parameters corresponding to the combination of the two quantities are used as the parameters for reversely adjusting the magnetic separation process; wherein j is smallN or more.
Further, the fine quartz powder in the step S1 is obtained by sequentially carrying out size mixing, floatation, medicine removal, cleaning, dehydration and drying on the quartz powder.
Advantageous effects
According to the invention, through repeated magnetic separation and ball milling, impurities contained in quartz powder are deeply removed, and the purity and fineness of the product are improved. The alternate and repeated process of magnetic separation and ball milling steps can determine how the magnetic separation effect is achieved through the quantitative method of the ternary function relationship, and the magnetic separation parameters can be improved through the quantitative method in the alternate and repeated process of the magnetic separation and ball milling steps, so that the efficiency is improved, and the magnetic separation effect is guaranteed.
Detailed Description
The application discloses a method for preparing high-purity superfine silica powder from quartz powder, which comprises the following steps:
s1, obtaining fine quartz powder, and carrying out primary magnetic separation on the fine quartz powder, wherein the magnetic separation time is T 1 The magnetic field strength is N 1 Primarily removing magnetic minerals contained in the powder particles;
s2, feeding the quartz powder subjected to magnetic separation into a non-ore ball mill for primary ball milling, wherein the primary ball milling time is t 1 The diameter range of the powder particles screened by the classifier after the primary ball milling is smaller than a 1 Is a primary quartz powder; carrying out secondary magnetic separation on the primary quartz powder, wherein the secondary magnetic separation time is T 2 The magnetic field strength is N 2 ；
S3, conveying the quartz powder subjected to secondary magnetic separation into a non-ore ball mill again for secondary ball milling, wherein the secondary ball milling time is t 2 The diameter range of the powder particles screened by a classifier after secondary ball milling is a 2 Secondary quartz powder of (a); carrying out three times of magnetic separation on the secondary quartz powder, wherein the time of the three times of magnetic separation is t 3 The magnetic field strength is N 3 The method comprises the steps of carrying out a first treatment on the surface of the Repeating the magnetic separation and ball milling steps until the diameter range of the obtained powder meets the fineness threshold a n And the magnetic separation prediction result meets a threshold value, wherein the magnetic minerals comprise ferromagnetic minerals. The fine quartz powder in the step S1 is obtained by sequentially carrying out size mixing, floatation, medicine removal and cleaning on the quartz powderWashing, dehydrating and drying.
According to the method, the obtained particle diameter range can meet the threshold value and the magnetic separation prediction result meets the threshold value through the alternate and repeated magnetic separation and ball milling steps.
In more specific implementation, judging whether the predicted magnetic separation result meets a threshold value or not, wherein the steps of repeating the magnetic separation and ball milling are repeated for n-1 times, the steps of repeating the magnetic separation and ball milling for n-1 times, and the time T of the i-1 th magnetic separation is counted in the i-1 th magnetic separation i-1 Magnetic field strength N of ith-1 st magnetic separation i-1 Adding a permanent magnet block in the ith ball milling process, counting the weight change of the permanent magnet block in the ith ball milling process in the calibration time, taking the weight change of the permanent magnet block in the ith ball milling process in the calibration time as a dependent variable, and taking the time T of the ith-1 magnetic separation in the ith-1 magnetic selection i-1 Magnetic field strength N of ith-1 st magnetic separation i-1 Establishing a ternary function relation about two independent variables and one dependent variable by using the two quantities as independent variables, setting different weights and biases for the two independent variables in the ternary function relation, wherein i is less than or equal to n, then expanding the statistical range, namely modifying the numerical value of i to increase data, and optimizing and training the weights and biases in the ternary function relation until a ternary function relation with parameter convergence is obtained; time T of jth-1 magnetic separation in jth-1 magnetic selection j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 And inputting the two quantities as independent variables into a ternary function relation converged by the parameters, outputting the variation of the weight of the permanent magnet in the j-th ball milling process in the calibration time, and if the variation of the weight of the permanent magnet in the calibration time meets a threshold value, determining that the magnetic separation prediction result meets the threshold value, wherein j is less than or equal to n. The alternating and repeating process of the magnetic separation and ball milling steps can determine how the magnetic separation effect is achieved through a quantitative method.
Whether the magnetic separation prediction result obtained through the ternary function relation of parameter convergence in the magnetic process meets the parameter of the threshold reverse adjustment magnetic process or not, specifically, the time T of the j-1 th magnetic separation in the j-1 th magnetic selection j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 The two quantities are used as independent variables to input the ternary function relation of parameter convergence to output the variation quantity of the weight of the permanent magnet in the process of the jth ball milling in the calibration time, and then the jth-1 magnetic separation time T of the jth-1 magnetic selection is established in a statistics mode j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 The second type ternary function relation of the weight change amount of the permanent magnet in the jth ball milling process in relation to the weight change amount of the permanent magnet in the calibration time is reversely deduced according to the second type ternary function relation, and the jth-1 magnetic separation time T of the jth-1 magnetic selection corresponds to the time when the weight change amount of the permanent magnet in the jth ball milling process in relation to the ideal weight change amount in the calibration time is reached j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 Incremental combination of two quantities, the time T of the j-1 magnetic separation in the j-1 magnetic selection of the reverse pushing j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 Time T of j-1 magnetic separation of j-1 magnetic selections corresponding to incremental combination calculation of two quantities j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 The parameters corresponding to the combination of the two quantities are used as the parameters for reversely adjusting the magnetic separation process; wherein j is less than or equal to n. In the alternative and repeated process of magnetic separation and ball milling steps, magnetic separation parameters can be improved by a quantitative method, so that the efficiency is improved, and the magnetic separation effect is ensured.
It will be appreciated by those skilled in the art that the present invention can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are illustrative in all respects, and not exclusive. All changes that come within the scope of the invention or equivalents thereto are intended to be embraced therein.
Claims (5)
1. The method for preparing the high-purity superfine silica powder from the quartz powder is characterized by comprising the following steps of
S1, obtaining fine quartz powder, and carrying out primary magnetic separation on the fine quartz powder, wherein the magnetic separation time is T 1 The magnetic field strength is N 1 Primarily removing magnetic minerals contained in the powder particles;
s2, conveying the quartz powder subjected to magnetic separation into a non-ore ball mill for primary ball milling and primary ball millingBall milling time is t 1 The diameter range of the powder particles screened by a classifier after the primary ball milling is a 1 Is a primary quartz powder; carrying out secondary magnetic separation on the primary quartz powder, wherein the secondary magnetic separation time is T 2 The magnetic field strength is N 2 ；
S3, conveying the quartz powder subjected to secondary magnetic separation into a non-ore ball mill again for secondary ball milling, wherein the secondary ball milling time is t 2 The diameter range of the powder particles screened by a classifier after secondary ball milling is a 2 Secondary quartz powder of (a); carrying out three times of magnetic separation on the secondary quartz powder, wherein the time of the three times of magnetic separation is T 3 The magnetic field strength is N 3 The method comprises the steps of carrying out a first treatment on the surface of the Repeating the magnetic separation and ball milling steps until the diameter of the obtained powder meets the fineness threshold a n And the magnetic separation prediction result meets a threshold value;
judging whether the predicted magnetic separation result meets a threshold value, specifically, repeating the magnetic separation and ball milling steps for n-1 times in total, and counting the time T of the ith-1 times in the ith-1 times of magnetic separation i-1 Magnetic field strength N of ith-1 st magnetic separation i-1 Adding a permanent magnet block in the ith ball milling process, counting the weight change of the permanent magnet block in the ith ball milling process in the calibration time, taking the weight change of the permanent magnet block in the ith ball milling process in the calibration time as a dependent variable, and taking the time T of the ith-1 magnetic separation in the ith-1 magnetic selection i-1 Magnetic field strength N of ith-1 st magnetic separation i-1 Establishing a ternary function relation about two independent variables and one dependent variable by using the two quantities as independent variables, setting different weights and biases for the two independent variables in the ternary function relation, wherein i is less than or equal to n, then expanding the statistical range, namely modifying the numerical value of i to increase data, and optimizing and training the weights and biases in the ternary function relation until a ternary function relation with parameter convergence is obtained; time T of jth-1 magnetic separation in jth-1 magnetic selection j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 The two quantities are used as independent variables to input the ternary function relation of parameter convergence to output the variation quantity of the weight of the permanent magnet in the calibration time in the jth ball milling process, if the permanent magnet is in the calibration timeAnd if the change amount of the weight in the fixed time meets the threshold value, the magnetic separation prediction result meets the threshold value, wherein j is less than or equal to n.
2. The method of preparing high purity ultrafine silica powder from quartz powder according to claim 1, wherein the magnetic mineral comprises a ferromagnetic mineral.
3. The method for preparing high-purity ultrafine silica powder from quartz powder according to claim 1, wherein whether the predicted magnetic separation result obtained by the ternary function relation of parameter convergence in the magnetic separation process meets the threshold value or not is characterized in that the parameters of the magnetic separation process are reversely adjusted.
4. The method for preparing high-purity ultrafine silica powder from quartz powder according to claim 3, wherein whether the predicted magnetic separation result obtained by the ternary function relation of parameter convergence in the magnetic separation process meets the threshold value or not is determined by reversely adjusting the parameters of the magnetic separation process, specifically, the time T of the j-1 th magnetic separation in the j-1 th magnetic separation j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 The two quantities are used as independent variables to input the ternary function relation of parameter convergence to output the variation quantity of the weight of the permanent magnet in the process of the jth ball milling in the calibration time, and then the jth-1 magnetic separation time T of the jth-1 magnetic selection is established in a statistics mode j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 The second type ternary function relation of the weight change amount of the permanent magnet in the jth ball milling process in relation to the weight change amount of the permanent magnet in the calibration time is reversely deduced according to the second type ternary function relation, and the jth-1 magnetic separation time T of the jth-1 magnetic selection corresponds to the time when the weight change amount of the permanent magnet in the jth ball milling process in relation to the ideal weight change amount in the calibration time is reached j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 Incremental combination of two quantities, the time T of the j-1 magnetic separation in the j-1 magnetic selection of the reverse pushing j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 Time T of j-1 magnetic separation of j-1 magnetic selections corresponding to incremental combination calculation of two quantities j-1 Magnetic field strength N of jth-1 th magnetic separation j-1 Two amounts ofCombining the corresponding parameters as parameters for reversely adjusting the magnetic separation process; wherein j is less than or equal to n.
5. The method for preparing high-purity superfine silica powder from quartz powder according to claim 1, wherein the fine quartz powder in S1 is obtained by sequentially subjecting quartz powder to size mixing, flotation, chemical removal, cleaning, dehydration and drying.
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| CN202211294910.6A CN115487924B (en) | 2022-10-21 | 2022-10-21 | Method for preparing high-purity superfine silica micropowder from quartz powder |
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| CN117326563B (en) * | 2023-09-28 | 2024-03-22 | 吉安豫顺新材料有限公司 | Preparation method and system of low-impurity silicon micro powder for vehicle-mounted copper-clad plate |
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| CN101480632B (en) * | 2009-01-12 | 2011-04-27 | 安徽大昌矿业集团有限公司 | Mineral separation process of magnetic iron ore |
| CN202465294U (en) * | 2012-03-18 | 2012-10-03 | 江苏融汇石英材料科技有限公司 | Novel fused obtuse-angle quartz sand production plant for photovoltaic industry |
| CN107032600B (en) * | 2017-03-20 | 2019-07-16 | 凯盛石英材料（黄山）有限公司 | A method of TFT-LCD silicon powder is prepared using vein quartz tailings |
| CN107159426A (en) * | 2017-04-27 | 2017-09-15 | 酒泉钢铁(集团)有限责任公司 | A kind of slag is secondary to select iron method |
| CN112317101B (en) * | 2020-11-12 | 2022-03-08 | 中山大学 | Physical separation system for metal impurities in broken waste glass |
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