Automatic processing method and system for quartz sand

Abstract

The invention relates to the technical field of silicon compound processing, and discloses an automatic quartz sand processing method and system.The method comprises the steps that quartz sand raw materials are preliminarily screened through screening equipment, crude sand and impurities are separated out, the crude sand is crushed and cleaned through pretreatment equipment, and pretreated crude sand is obtained; the method comprises the following steps: grinding and screening by using automatic ball milling equipment to obtain fine-grained crude sand, removing magnetic impurities by using automatic magnetic separation equipment to obtain primary purified quartz sand, carrying out acid leaching purification by using acid leaching reaction equipment to obtain secondary purified quartz sand, and roasting and purifying by using high-temperature roasting equipment to obtain tertiary purified quartz sand. And finally, carrying out comprehensive detection through quality detection equipment and generating a quality detection report. According to the method, the purity and the quality stability of the processed quartz sand are remarkably improved through an integrated process and a full-process automatic control method, and the system has good expandability and has remarkable economic and environment-friendly benefits.

Description

Technical Field

[0001] This invention relates to the field of silicon compound processing technology, and in particular to an automated processing method and system for quartz sand. Background Technology

[0002] In the traditional quartz sand processing, most of the steps rely on manual operation or semi-automated equipment, and the connection between the equipment is not tight enough. This operation method is not only inefficient, but also prone to unstable processing quality due to human factors, making it difficult to achieve dynamic optimization of the entire processing flow.

[0003] Traditional quartz sand purification processes typically employ only a single purification method, such as magnetic separation or acid leaching, which is insufficient to effectively remove multiple impurities. For instance, magnetic separation can only remove magnetic ferrous impurities, while it is ineffective against non-magnetic impurities. Although acid leaching can remove some impurities, its purification effect is limited due to the lack of precise impurity detection and acid ratio control. This single purification method cannot meet the production requirements of high-purity quartz sand.

[0004] Traditional quartz sand processing technology has poor adaptability to raw materials. It can usually only process quartz sand raw materials with specific particle size range and impurity content. When the particle size or impurity content of the raw material exceeds the process range, additional processing steps are required, resulting in low processing efficiency.

[0005] Traditional quartz sand processing technology has poor scalability. When it is necessary to increase production, it is often necessary to redesign and install the entire set of equipment, which is not only time-consuming and labor-intensive, but also costly, thus limiting the production flexibility and market competitiveness of enterprises. Summary of the Invention

[0006] This invention provides an automated processing method and system for quartz sand to address the problems in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an automated processing method for quartz sand, comprising the following steps:

[0008] Step S1: The quartz sand raw material is preliminarily screened using screening equipment to obtain raw sand;

[0009] Step S2: The raw sand is crushed and washed using pretreatment equipment to obtain pretreated raw sand;

[0010] Step S3: The pretreated raw sand is ground and sieved using an automated ball mill to obtain fine-grained raw sand;

[0011] Step S4: Use sampling equipment to detect impurities in fine-grained raw sand to obtain raw sand impurity measurement information;

[0012] Step S5: Based on the information on the determination of impurities in the raw sand, the fine-grained raw sand is purified by magnetic separation using an automated magnetic separation device to obtain first-grade purified quartz sand.

[0013] Step S6: Based on the impurity determination results, the primary purified quartz sand is purified by acid leaching using an acid leaching reaction device to obtain secondary purified quartz sand.

[0014] Step S7: The secondary purified quartz sand is purified by high-temperature roasting using a high-temperature roasting device to obtain tertiary purified quartz sand.

[0015] Step S8: The tertiary purified quartz sand is tested using quality testing equipment to obtain a quality testing report.

[0016] Furthermore, step S1 also includes the following sub-steps:

[0017] S1-1, Input the quartz sand raw material into the screening equipment and set the screening time;

[0018] S1-2, Start the screening equipment and, according to the set screening time, separate the raw sand and raw material impurities from the quartz sand raw material through mechanical vibration and rotation. The raw material impurities include soil, stones or plant roots.

[0019] S1-3, During the screening process, the screening control unit monitors the operating status of the screening equipment in real time through vibration sensors and pressure sensors, and automatically adjusts the vibration frequency and rotation speed of the screening equipment according to the operating status of the screening equipment.

[0020] S1-4 After screening, the raw sand is transported to the pretreatment equipment for classification and recovery of raw material impurities.

[0021] Furthermore, step S2 also includes the following sub-steps:

[0022] S2-1, The pretreatment equipment receives raw sand from the screening equipment, and the pretreatment equipment includes a cone crusher, a spiral sand washer and an ultrasonic cleaning device;

[0023] S2-2, The raw sand is crushed by a cone crusher to obtain crushed raw sand;

[0024] S2-3, The crushed raw sand is washed using a spiral sand washing machine to obtain washed raw sand;

[0025] S2-4, The cleaned raw sand is subjected to ultrasonic impurity removal treatment by ultrasonic cleaning equipment to obtain pretreated raw sand;

[0026] S2-5, the pretreated raw sand is transported to an automated ball mill.

[0027] Furthermore, step S3 also includes the following sub-steps:

[0028] S3-1, The automated ball mill receives pretreated raw sand from the pretreatment equipment. The automated ball mill includes a ball mill, a sieve, a vibration damping device, a sound insulation device, and a ball mill control unit.

[0029] S3-2, The particle size of the pretreated raw sand is monitored by a sieve analyzer, and the operating parameters of the ball mill are set according to the particle size of the pretreated raw sand. The operating parameters of the ball mill include rotation speed, grinding time, and steel ball addition amount.

[0030] S3-3, The ball mill control unit controls the ball mill to grind the pretreated raw sand according to the ball mill operating parameters to obtain fine-grained raw sand;

[0031] S3-4 During the grinding process, the ball mill control unit monitors the operating status of the ball mill in real time through temperature and pressure sensors, and automatically adjusts the operating parameters of the ball mill according to the operating status of the ball mill. At the same time, it controls the vibration intensity of the ball mill through a shock absorption device and controls the noise level of the ball mill through a sound insulation device.

[0032] S3-5, Set the grinding particle size requirements. After grinding, monitor the particle size of the fine raw sand using a sieve analyzer. Separate the fine raw sand that meets the particle size requirements and transport it to an automated magnetic separator. Send the fine raw sand that does not meet the particle size requirements back to the ball mill for further grinding.

[0033] Furthermore, step S4 also includes the following sub-steps:

[0034] S4-1, the sampling equipment uniformly samples fine-grained raw sand from the automated ball mill to obtain raw sand samples. The sampling equipment includes an X-ray fluorescence spectrometer, an infrared spectrometer, and a data processing unit.

[0035] S4-2, X-ray fluorescence spectrometer detects the type and content of metal impurities in the raw sand sample, and infrared spectrometer detects the type and content of organic impurities in the raw sand sample;

[0036] S4-3, The data processing unit performs data fusion on the metal impurity type, metal impurity content, organic impurity type and organic impurity content through a multi-sensor data fusion algorithm to obtain data-based impurity information;

[0037] S4-4, The data-driven impurity information is feature-extracted using principal component analysis to generate raw sand impurity measurement information, which includes magnetic separation impurity characteristics and acid leaching impurity characteristics. The raw sand impurity measurement information is then sent to the automated magnetic separation equipment and the acid leaching reaction equipment.

[0038] Furthermore, step S5 also includes the following sub-steps:

[0039] S5-1, The automated magnetic separation equipment receives fine-grained raw sand from an automated ball mill and raw sand impurity measurement information from a sampling inspection device. The automated magnetic separation equipment includes a high-gradient magnetic separator and a magnetic separation control unit.

[0040] S5-2, The magnetic separation control unit extracts the magnetic separation impurity characteristics from the raw sand impurity measurement information, and sets the high gradient magnetic separator operating parameters according to the magnetic separation impurity characteristics. The high gradient magnetic separator operating parameters include magnetic field strength and material flow rate.

[0041] S5-3, the magnetic separation control unit controls the high gradient magnetic separator to perform magnetic separation on the fine-grained raw sand according to the operating parameters of the high gradient magnetic separator, so as to remove magnetic iron impurities in the fine-grained raw sand and obtain first-grade purified quartz sand.

[0042] S5-4, the primary purified quartz sand is transported to the acid leaching reaction equipment.

[0043] Furthermore, step S6 also includes the following sub-steps:

[0044] S6-1, the acid leaching reaction equipment receives primary purified quartz sand from the automated magnetic separation equipment and raw sand impurity measurement information from the sampling inspection equipment. The acid leaching reaction equipment includes a fiberglass reactor, a stirring device, a heating device, a centrifugal device, and an acid leaching control unit.

[0045] S6-2, the acid leaching control unit extracts the acid leaching impurity characteristics from the raw sand impurity measurement information, selects the type, concentration and amount of acid solution according to the acid leaching impurity characteristics, and inputs the corresponding type, concentration and amount of acid solution into the fiberglass reactor;

[0046] S6-3, the primary purified quartz sand is acid-leached through a fiberglass reactor to obtain acid-leached primary purified quartz sand and acid solution after reaction. During the acid leaching process, the primary purified quartz sand and acid solution are stirred and mixed by a stirring device, and the temperature inside the fiberglass reactor is controlled within the range of ≥85℃ and ≤90℃ by a heating device.

[0047] S6-4 After acid leaching, the primary purified quartz sand after acid leaching and the acid solution after reaction are separated by a centrifuge to obtain the separated primary purified quartz sand.

[0048] S6-5, the separated primary purified quartz sand is washed multiple times with a weak alkaline solution and water to obtain secondary purified quartz sand;

[0049] S6-6, the secondary purified quartz sand is transported to the high-temperature roasting equipment.

[0050] Furthermore, step S7 also includes the following sub-steps:

[0051] S7-1, the high-temperature roasting equipment receives secondary purified quartz sand from the acid leaching reaction equipment, the high-temperature roasting equipment includes a high-temperature roasting furnace, a roasting control unit, a waste heat recovery unit and a waste gas treatment unit;

[0052] S7-2, preset high-temperature roasting furnace operating parameters, the high-temperature roasting furnace operating parameters include preheating temperature, preheating time, roasting temperature, roasting time, holding time and cooling time;

[0053] S7-3, the roasting control unit controls the high-temperature roasting furnace to roast the secondary purified quartz sand according to the operating parameters of the high-temperature roasting furnace, so as to obtain the tertiary purified quartz sand, while generating waste heat and high-temperature exhaust gas.

[0054] S7-4, the waste heat recovery unit collects the waste heat generated in the high-temperature roasting furnace during the roasting process, performs energy conversion and energy storage on the waste heat, and obtains recovered thermal energy;

[0055] S7-5, the exhaust gas treatment unit condenses, desulfurizes and denitrates the high-temperature exhaust gas generated during the roasting process, and obtains and discharges purified exhaust gas;

[0056] S7-6, the three-stage purified quartz sand is transported to the quality testing equipment.

[0057] Furthermore, step S8 also includes the following sub-steps:

[0058] S8-1, the quality testing equipment receives three-stage purified quartz sand from the high-temperature roasting equipment, the quality testing equipment includes an X-ray fluorescence spectrometer, a laser particle size analyzer, an infrared moisture analyzer, and a gas chromatograph;

[0059] S8-2, The silica content in the three-stage purified quartz sand is detected by the X-ray fluorescence spectrometer to obtain the purity test result;

[0060] S8-3, The particle size distribution of the three-stage purified quartz sand is detected by the laser particle size analyzer to obtain the particle size detection results;

[0061] S8-4, The moisture content of the three-stage purified quartz sand is detected by the infrared moisture analyzer to obtain the moisture detection result;

[0062] S8-5, The content of organic impurities in the three-stage purified quartz sand is detected by the gas chromatograph to obtain the impurity detection results;

[0063] S8-6. Based on the purity test results, particle size test results, moisture test results, and impurity test results, a quality test report is generated and sent to relevant management and maintenance personnel.

[0064] An automated processing system for quartz sand includes:

[0065] Screening equipment: used for preliminary screening of quartz sand raw materials to obtain raw sand;

[0066] Pre-treatment equipment: used to crush and wash raw sand to obtain pre-treated raw sand;

[0067] Automated ball mill equipment: used to grind and screen pretreated raw sand to obtain fine-grained raw sand;

[0068] Sampling equipment: used to detect impurities in fine-grained raw sand and obtain information on the determination of impurities in the raw sand;

[0069] Automated magnetic separation equipment: used for magnetic separation and purification of fine-grained raw sand to obtain first-grade purified quartz sand;

[0070] Acid leaching reaction equipment: used to leach and purify primary purified quartz sand to obtain secondary purified quartz sand;

[0071] High-temperature roasting equipment: used to roast and purify secondary purified quartz sand at high temperatures to obtain tertiary purified quartz sand;

[0072] Quality testing equipment: Used to test the quality of tertiary purified quartz sand and obtain a quality test report.

[0073] The beneficial effects of the technical solution provided by this invention include at least the following:

[0074] This patented system integrates multiple complex processes such as screening, crushing, washing, grinding, magnetic separation, acid leaching, roasting, and quality inspection into a single, fully automated processing system. This achieves seamless connection and collaborative operation among the various processes, greatly improving production efficiency and product quality stability, reducing manual intervention, and optimizing the entire processing flow.

[0075] This patent employs a multi-stage purification process, sequentially purifying quartz sand through magnetic separation, acid leaching, and high-temperature roasting. Each step targets specific types of impurities for removal. This multi-stage purification process not only improves the purity of quartz sand but also reduces production costs and environmental risks.

[0076] The automated processing flow of this patent can adapt to quartz sand raw materials with different particle size ranges and impurity contents. By adjusting the parameters of each equipment (such as the operating parameters of the ball mill, the magnetic field strength of the magnetic separator, and the acid concentration of the acid leaching reaction equipment), efficient processing of different raw materials can be achieved. This highly adaptable design not only improves the versatility of the equipment, but also reduces the equipment investment cost for enterprises.

[0077] The automated processing system of this patent is highly scalable and can be modularly expanded according to the needs of production scale. For example, when it is necessary to increase output, only the corresponding equipment modules need to be added and integrated through the automated control system to achieve rapid expansion of production scale, effectively improving the enterprise's production flexibility and market competitiveness. Attached Figure Description

[0078] To more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0079] Figure 1 A flowchart of the method provided in an embodiment of the present invention;

[0080] Figure 2 This is a system structure diagram provided for an embodiment of the present invention. Detailed Implementation

[0081] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of an automated processing method and system for quartz sand according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0082] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0083] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0084] The following description, in conjunction with the accompanying drawings, details the specific scheme of the automated processing method and system for quartz sand provided by this invention.

[0085] Please see Figure 1The diagram illustrates a flowchart of an automated processing method for quartz sand according to an embodiment of the present invention, the method comprising the following steps:

[0086] Step S1: The quartz sand raw material is preliminarily screened using screening equipment to obtain raw sand;

[0087] Step S1 further includes the following sub-steps:

[0088] S1-1, Input the quartz sand raw material into the screening equipment and set the screening time;

[0089] S1-2, Start the screening equipment and, according to the set screening time, separate the raw sand and raw material impurities from the quartz sand raw material through mechanical vibration and rotation. The raw material impurities include soil, stones or plant roots.

[0090] S1-3, During the screening process, the screening control unit monitors the operating status of the screening equipment in real time through vibration sensors and pressure sensors, and automatically adjusts the vibration frequency and rotation speed of the screening equipment according to the operating status of the screening equipment.

[0091] S1-4 After screening, the raw sand is transported to the pretreatment equipment for classification and recovery of raw material impurities.

[0092] It should be noted that quartz sand raw material refers to natural quartz sand ore mined from mines without processing. Its main component is silicon dioxide (SiO2), with a content generally above 90%. In addition, it may contain small amounts of other mineral impurities (such as feldspar, mica, iron minerals and clay minerals), as well as some non-mineral impurities (such as soil, stones and plant roots). Quartz sand raw material usually appears as granules or blocks, and its color may be white, grayish-white, yellow, etc., depending on its composition and impurity content.

[0093] Screening equipment is a mechanical device used to separate materials according to particle size. When materials (such as quartz sand raw materials) enter the screening equipment, under the action of vibration and rotation, smaller particles will fall through the mesh of the screen, while larger particles will remain above the screen, thereby achieving the separation of materials of different particle sizes.

[0094] Raw sand refers to quartz sand particles with a certain particle size range that have been separated from raw quartz sand after preliminary screening by screening equipment. The specific particle size range needs to be determined according to the actual production process and requirements (usually between a few millimeters and tens of millimeters). The main component of raw sand is still silicon dioxide (SiO2), but after screening, the impurity content is lower and the particle size is more uniform. Compared with untreated raw quartz sand, it has better physical properties and chemical stability, making it suitable for subsequent processing.

[0095] Raw material impurities refer to substances other than the original sand mixed in the quartz sand raw material. Removing raw material impurities can reduce their interference and impact on subsequent processing, and also help extend the service life of processing equipment.

[0096] Step S2: The raw sand is crushed and washed using pretreatment equipment to obtain pretreated raw sand;

[0097] Step S2 further includes the following sub-steps:

[0098] S2-1, The pretreatment equipment receives raw sand from the screening equipment, and the pretreatment equipment includes a cone crusher, a spiral sand washer and an ultrasonic cleaning device;

[0099] S2-2, The raw sand is crushed by a cone crusher to obtain crushed raw sand;

[0100] S2-3, The crushed raw sand is washed using a spiral sand washing machine to obtain washed raw sand;

[0101] S2-4, The cleaned raw sand is subjected to ultrasonic impurity removal treatment by ultrasonic cleaning equipment to obtain pretreated raw sand;

[0102] S2-5, the pretreated raw sand is transported to an automated ball mill.

[0103] It should be noted that a cone crusher is a mechanical device used to crush larger particles into smaller particles. It is widely used in mining, building materials and other industries. It mainly consists of a moving cone and a fixed cone. The moving cone makes a gyratory motion under the traction of the eccentric bushing, causing the moving cone and the fixed cone to sometimes approach each other and sometimes deviate from each other. The material is constantly subjected to compression, impact and bending in the crushing chamber, thus crushing it into smaller particles.

[0104] Spiral sand washing machine is a mechanical device used for cleaning materials. It is mainly used to remove mud, dust and other impurities from the surface of materials and improve the purity of materials. It mainly consists of spiral blades, trough and reducer. The material is driven by the spiral blades in the trough. Under the stirring of the spiral blades and the flushing of the water flow, the impurities on the surface of the material are peeled off and discharged with the water flow, thereby realizing the cleaning of the material.

[0105] Step S3: The pretreated raw sand is ground and sieved using an automated ball mill to obtain fine-grained raw sand;

[0106] Step S3 further includes the following sub-steps:

[0107] S3-1, The automated ball mill receives pretreated raw sand from the pretreatment equipment. The automated ball mill includes a ball mill, a sieve, a vibration damping device, a sound insulation device, and a ball mill control unit.

[0108] S3-2, The particle size of the pretreated raw sand is monitored by a sieve analyzer, and the operating parameters of the ball mill are set according to the particle size of the pretreated raw sand. The operating parameters of the ball mill include rotation speed, grinding time, and steel ball addition amount.

[0109] S3-3, The ball mill control unit controls the ball mill to grind the pretreated raw sand according to the ball mill operating parameters to obtain fine-grained raw sand;

[0110] S3-4 During the grinding process, the ball mill control unit monitors the operating status of the ball mill in real time through temperature and pressure sensors, and automatically adjusts the operating parameters of the ball mill according to the operating status of the ball mill. At the same time, it controls the vibration intensity of the ball mill through a shock absorption device and controls the noise level of the ball mill through a sound insulation device.

[0111] S3-5, Set the grinding particle size requirements. After grinding, monitor the particle size of the fine raw sand using a sieve analyzer. Separate the fine raw sand that meets the particle size requirements and transport it to an automated magnetic separator. Send the fine raw sand that does not meet the particle size requirements back to the ball mill for further grinding.

[0112] It should be noted that a ball mill is a device used to grind materials into fine powder. It is widely used in mineral processing, chemical and building materials industries. It mainly consists of a cylinder, liners, steel balls (i.e., grinding media) and a transmission device. The material is fed into the cylinder containing a certain amount of steel balls. When the cylinder rotates, the material is ground under the action of centrifugal force and friction.

[0113] A sieve separator is a device used to measure and control the particle size of materials. It can monitor the particle size information of materials in real time. When materials pass through the sieve separator, the instrument will acquire particle size information through optical or ultrasonic sensors according to the size and shape of the material particles, and convert this information into electrical signals, which are finally displayed in the form of particle size distribution curves.

[0114] A ball mill control unit is an automated control system used to control the operation of a ball mill. It calculates the operating parameters of the ball mill by receiving particle size information from a sieve analyzer and controls the ball mill to achieve efficient grinding of materials.

[0115] Step S4: Use sampling equipment to detect impurities in fine-grained raw sand to obtain raw sand impurity measurement information;

[0116] S4-1, the sampling equipment uniformly samples fine-grained raw sand from the automated ball mill to obtain raw sand samples. The sampling equipment includes an X-ray fluorescence spectrometer, an infrared spectrometer, and a data processing unit.

[0117] S4-2, X-ray fluorescence spectrometer detects the type and content of metal impurities in the raw sand sample, and infrared spectrometer detects the type and content of organic impurities in the raw sand sample;

[0118] S4-3, The data processing unit performs data fusion on the metal impurity type, metal impurity content, organic impurity type and organic impurity content through a multi-sensor data fusion algorithm to obtain data-based impurity information;

[0119] S4-4, The data-driven impurity information is feature-extracted using principal component analysis to generate raw sand impurity measurement information, which includes magnetic separation impurity characteristics and acid leaching impurity characteristics. The raw sand impurity measurement information is then sent to the automated magnetic separation equipment and the acid leaching reaction equipment.

[0120] It should be noted that the X-ray fluorescence spectrometer determines the types and contents of elements in the sample by measuring the wavelength and intensity of the fluorescent X-rays emitted by the sample under X-ray irradiation. In step S4, the X-ray fluorescence spectrometer is used to detect the type and contents of metallic impurities in the raw sand sample.

[0121] Infrared spectrometers utilize the absorption characteristics of organic molecules to infrared light of specific wavelengths to measure the types and contents of organic matter in a sample. In step S4, infrared spectrometers are used to detect the types and contents of organic impurities in the original sand sample.

[0122] Principal Component Analysis (PCA) is a statistical method used to reduce high-dimensional data to a low-dimensional space while preserving the main features of the data. It is commonly used for feature extraction of various types of data.

[0123] Step S5: Fine-grained raw sand is purified by magnetic separation using an automated magnetic separation device to obtain primary purified quartz sand.

[0124] Step S5 further includes the following sub-steps:

[0125] S5-1, The automated magnetic separation equipment receives fine-grained raw sand from an automated ball mill and raw sand impurity measurement information from a sampling inspection device. The automated magnetic separation equipment includes a high-gradient magnetic separator and a magnetic separation control unit.

[0126] S5-2, The magnetic separation control unit extracts the magnetic separation impurity characteristics from the raw sand impurity measurement information, and sets the high gradient magnetic separator operating parameters according to the magnetic separation impurity characteristics. The high gradient magnetic separator operating parameters include magnetic field strength and material flow rate.

[0127] S5-3, the magnetic separation control unit controls the high gradient magnetic separator to perform magnetic separation on the fine-grained raw sand according to the operating parameters of the high gradient magnetic separator, so as to remove magnetic iron impurities in the fine-grained raw sand and obtain first-grade purified quartz sand.

[0128] S5-4, the primary purified quartz sand is transported to the acid leaching reaction equipment.

[0129] It should be noted that a high gradient magnetic separator is a device that uses a magnetic field to separate magnetic and non-magnetic substances. It is widely used in the mineral processing field. It mainly consists of a magnetic field generating device, a sorting zone, and a conveying device. When fine-grained raw sand enters the sorting zone, magnetic impurities (such as iron impurities) are adsorbed onto the magnetic poles under the action of the magnetic field, while non-magnetic substances (such as quartz sand) are carried away by the conveying device, thereby achieving the separation of magnetic impurities and non-magnetic substances.

[0130] A magnetic separation control unit is an automated control system used to control the operation of a magnetic separator. It controls the magnetic separator by using its operating parameters to achieve automated magnetic separation and purification of materials.

[0131] Step S6: The primary purified quartz sand is purified by acid leaching using an acid leaching reaction device to obtain secondary purified quartz sand.

[0132] Step S6 further includes the following sub-steps:

[0133] S6-1, the acid leaching reaction equipment receives primary purified quartz sand from the automated magnetic separation equipment and raw sand impurity measurement information from the sampling inspection equipment. The acid leaching reaction equipment includes a fiberglass reactor, a stirring device, a heating device, a centrifugal device, and an acid leaching control unit.

[0134] S6-2, the acid leaching control unit extracts the acid leaching impurity characteristics from the raw sand impurity measurement information, selects the type, concentration and amount of acid solution according to the acid leaching impurity characteristics, and inputs the corresponding type, concentration and amount of acid solution into the fiberglass reactor;

[0135] S6-3, the primary purified quartz sand is acid-leached through a fiberglass reactor to obtain acid-leached primary purified quartz sand and acid solution after reaction. During the acid leaching process, the primary purified quartz sand and acid solution are stirred and mixed by a stirring device, and the temperature inside the fiberglass reactor is controlled within the range of ≥85℃ and ≤90℃ by a heating device.

[0136] S6-4 After acid leaching, the primary purified quartz sand after acid leaching and the acid solution after reaction are separated by a centrifuge to obtain the separated primary purified quartz sand.

[0137] S6-5, the separated primary purified quartz sand is washed multiple times with a weak alkaline solution and water to obtain secondary purified quartz sand;

[0138] S6-6, the secondary purified quartz sand is transported to the high-temperature roasting equipment.

[0139] It should be noted that a fiberglass reactor is a reaction vessel made of glass fiber reinforced plastic. It is widely used in chemical reactions, especially in the treatment of corrosive media. Its material has good corrosion resistance, can withstand acidic environments, and also has certain mechanical strength and thermal stability.

[0140] A mass spectrometer is an instrument used to analyze the composition and structure of substances. It ionizes sample molecules into charged ions through ionization, then separates these charged ions according to their mass-to-charge ratio using a mass analyzer, and finally records the signal intensity of the ions and generates a mass spectrum using a detector. The mass spectrum can be used to determine the type and content of each component in the sample.

[0141] A stirring device is a device used to mix reactants. It typically consists of a motor, a stirring shaft, and stirring blades. The motor drives the stirring shaft, which in turn rotates the stirring blades to stir the reactants inside the reactor, ensuring thorough mixing of the materials.

[0142] A heating device is a device used to provide heat, which is provided by electric heating or steam heating to meet the temperature requirements of chemical reactions. In fiberglass reactors, the heating device can be installed on the outside of the reactor and heat is transferred to the inside of the reactor through a heating medium (such as hot water, steam or electric heating wire).

[0143] A centrifuge is a device that uses centrifugal force to separate substances of different densities. It generates centrifugal force through high-speed rotation, causing denser solid particles to settle, thereby achieving the separation of solids and liquids.

[0144] Step S7: The secondary purified quartz sand is purified by high-temperature roasting using a high-temperature roasting device to obtain tertiary purified quartz sand.

[0145] Step S7 further includes the following sub-steps:

[0146] S7-1, the high-temperature roasting equipment receives secondary purified quartz sand from the acid leaching reaction equipment, the high-temperature roasting equipment includes a high-temperature roasting furnace, a roasting control unit, a waste heat recovery unit and a waste gas treatment unit;

[0147] S7-2, preset high-temperature roasting furnace operating parameters, the high-temperature roasting furnace operating parameters include preheating temperature, preheating time, roasting temperature, roasting time, holding time and cooling time;

[0148] S7-3, the roasting control unit controls the high-temperature roasting furnace to roast the secondary purified quartz sand according to the operating parameters of the high-temperature roasting furnace, so as to obtain the tertiary purified quartz sand, while generating waste heat and high-temperature exhaust gas.

[0149] S7-4, the waste heat recovery unit collects the waste heat generated in the high-temperature roasting furnace during the roasting process, performs energy conversion and energy storage on the waste heat, and obtains recovered thermal energy;

[0150] S7-5, the exhaust gas treatment unit condenses, desulfurizes and denitrates the high-temperature exhaust gas generated during the roasting process, and obtains and discharges purified exhaust gas;

[0151] S7-6, the three-stage purified quartz sand is transported to the quality testing equipment.

[0152] It should be noted that a high-temperature roasting furnace is a device used to heat-treat materials under high-temperature conditions. It is widely used in mineral processing, chemical industry, metallurgy and other fields. It generates a high-temperature environment by using natural gas, coal gas or electricity to heat the material to a specified temperature. Under the action of high temperature, the moisture and some organic impurities in the material evaporate or decompose, thereby achieving the purpose of purifying the material or improving the physicochemical properties of the material.

[0153] The roasting control unit is an automated control system used to control the operation of a high-temperature roasting furnace. It adjusts the power and running time of the heating device according to the set roasting control parameters to achieve automated roasting and purification of materials.

[0154] Condensation treatment refers to cooling and condensing water vapor in high-temperature waste gas through a condenser, recovering the condensate, and reducing the temperature of the waste gas to facilitate subsequent desulfurization and denitrification treatment.

[0155] Desulfurization treatment refers to the use of wet desulfurization technology, which removes sulfur dioxide (SO2) from waste gas through a spray absorption tower. The specific technical methods are as follows:

[0156] In the spray absorption tower, the waste gas comes into contact with limestone slurry or sodium hydroxide solution. The SO2 in the waste gas reacts with the absorbent to produce calcium sulfite or sodium sulfate, which can be oxidized to calcium sulfate and recovered as a byproduct.

[0157] Denitrification treatment refers to the use of selective catalytic reduction (SCR) technology to convert nitrogen oxides in waste gas into nitrogen (N2) and water vapor (H2O). The specific technical methods are as follows:

[0158] A catalyst bed is established using a honeycomb or plate-type titanium-based catalyst. An appropriate amount of ammonia is injected into the waste gas and introduced into the catalyst bed. The reaction temperature is controlled between 300℃ and 400℃, so that the ammonia reacts with the nitrogen oxides in the waste gas under the action of the catalyst.

[0159] Step S8: The tertiary purified quartz sand is tested using quality testing equipment to obtain a quality testing report;

[0160] Step S8 further includes the following sub-steps:

[0161] S8-1, the quality testing equipment receives three-stage purified quartz sand from the high-temperature roasting equipment, the quality testing equipment includes an X-ray fluorescence spectrometer, a laser particle size analyzer, an infrared moisture analyzer, and a gas chromatograph;

[0162] S8-2, The silica content in the three-stage purified quartz sand is detected by the X-ray fluorescence spectrometer to obtain the purity test result;

[0163] S8-3, The particle size distribution of the three-stage purified quartz sand is detected by the laser particle size analyzer to obtain the particle size detection results;

[0164] S8-4, The moisture content of the three-stage purified quartz sand is detected by the infrared moisture analyzer to obtain the moisture detection result;

[0165] S8-5, The content of organic impurities in the three-stage purified quartz sand is detected by the gas chromatograph to obtain the impurity detection results;

[0166] S8-6. Based on the purity test results, particle size test results, moisture test results, and impurity test results, a quality test report is generated and sent to relevant management and maintenance personnel.

[0167] It should be noted that the X-ray fluorescence spectrometer determines the types and contents of elements in the sample by measuring the wavelength and intensity of the fluorescent X-rays emitted by the sample under X-ray irradiation. In step S8, the X-ray fluorescence spectrometer is used to detect the silica (SiO2) content in the tertiary purified quartz sand.

[0168] The laser particle size analyzer uses the principle of laser scattering to measure the particle size distribution of a sample. When the laser beam passes through the particle suspension, the particles scatter the laser. By detecting the intensity and angle distribution of the scattered light, the particle size distribution can be calculated. In step S8, the laser particle size analyzer is used to detect the particle size distribution of the tertiary purified quartz sand.

[0169] The infrared moisture analyzer uses the absorption characteristics of water molecules to infrared light of a specific wavelength to measure the moisture content in a sample. In step S8, the infrared moisture analyzer is used to detect the moisture content of the tertiary purified quartz sand.

[0170] The basic principle of gas chromatography is that after the sample is vaporized at high temperature, it is carried into the chromatographic column by a carrier gas (such as helium and nitrogen). Based on the principle that different components in the sample migrate at different speeds in the chromatographic column, the components are separated. The content of each component is detected by a detector (such as a thermal conductivity detector). In step S8, the gas chromatograph is used to detect the content of organic impurities in the tertiary purified quartz sand.

[0171] Please see Figure 2 The diagram illustrates a system structure of an automated quartz sand processing system according to an embodiment of the present invention. The system includes:

[0172] Screening equipment: used for preliminary screening of quartz sand raw materials to obtain raw sand;

[0173] Pre-treatment equipment: used to crush and wash raw sand to obtain pre-treated raw sand;

[0174] Automated ball mill equipment: used to grind and screen pretreated raw sand to obtain fine-grained raw sand;

[0175] Automated magnetic separation equipment: used for magnetic separation and purification of fine-grained raw sand to obtain first-grade purified quartz sand;

[0176] Acid leaching reaction equipment: used to leach and purify primary purified quartz sand to obtain secondary purified quartz sand;

[0177] High-temperature roasting equipment: used to roast and purify secondary purified quartz sand at high temperatures to obtain tertiary purified quartz sand;

[0178] Quality testing equipment: Used to test the quality of tertiary purified quartz sand and obtain a quality test report.

[0179] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An automated processing method for quartz sand, characterized in that, The method includes: Step S1: The quartz sand raw material is preliminarily screened using screening equipment to obtain raw sand; Step S2: The raw sand is crushed and washed using pretreatment equipment to obtain pretreated raw sand; Step S3: The pretreated raw sand is ground and sieved using an automated ball mill to obtain fine-grained raw sand; Step S4: Use sampling equipment to detect impurities in fine-grained raw sand to obtain raw sand impurity measurement information; Step S5: Based on the information on the determination of impurities in the raw sand, the fine-grained raw sand is purified by magnetic separation using an automated magnetic separation device to obtain first-grade purified quartz sand. Step S6: Based on the impurity determination results, the primary purified quartz sand is purified by acid leaching using an acid leaching reaction device to obtain secondary purified quartz sand. Step S7: The secondary purified quartz sand is purified by high-temperature roasting using a high-temperature roasting device to obtain tertiary purified quartz sand. Step S8: The tertiary purified quartz sand is tested using quality testing equipment to obtain a quality testing report.

2. The automated processing method for quartz sand according to claim 1, characterized in that: Step S1 further includes the following sub-steps: S1-1, Input the quartz sand raw material into the screening equipment and set the screening time; S1-2, Start the screening equipment and, according to the set screening time, separate the raw sand and raw material impurities from the quartz sand raw material through mechanical vibration and rotation. The raw material impurities include soil, stones or plant roots. S1-3, During the screening process, the screening control unit monitors the operating status of the screening equipment in real time through vibration sensors and pressure sensors, and automatically adjusts the vibration frequency and rotation speed of the screening equipment according to the operating status of the screening equipment. S1-4 After screening, the raw sand is transported to the pretreatment equipment for classification and recovery of raw material impurities.

3. The automated processing method for quartz sand according to claim 1, characterized in that: Step S2 further includes the following sub-steps: S2-1, The pretreatment equipment receives raw sand from the screening equipment, and the pretreatment equipment includes a cone crusher, a spiral sand washer and an ultrasonic cleaning device; S2-2, The raw sand is crushed by a cone crusher to obtain crushed raw sand; S2-3, The crushed raw sand is washed using a spiral sand washing machine to obtain washed raw sand; S2-4, The cleaned raw sand is subjected to ultrasonic impurity removal treatment by ultrasonic cleaning equipment to obtain pretreated raw sand; S2-5, the pretreated raw sand is transported to an automated ball mill.

4. The automated processing method for quartz sand according to claim 1, characterized in that: Step S3 further includes the following sub-steps: S3-1, The automated ball mill receives pretreated raw sand from the pretreatment equipment. The automated ball mill includes a ball mill, a sieve, a vibration damping device, a sound insulation device, and a ball mill control unit. S3-2, The particle size of the pretreated raw sand is monitored by a sieve analyzer, and the operating parameters of the ball mill are set according to the particle size of the pretreated raw sand. The operating parameters of the ball mill include rotation speed, grinding time, and steel ball addition amount. S3-3, The ball mill control unit controls the ball mill to grind the pretreated raw sand according to the ball mill operating parameters to obtain fine-grained raw sand; S3-4 During the grinding process, the ball mill control unit monitors the operating status of the ball mill in real time through temperature and pressure sensors, and automatically adjusts the operating parameters of the ball mill according to the operating status of the ball mill. At the same time, it controls the vibration intensity of the ball mill through a shock absorption device and controls the noise level of the ball mill through a sound insulation device. S3-5, Set the grinding particle size requirements. After grinding, monitor the particle size of the fine raw sand using a sieve analyzer. Separate the fine raw sand that meets the particle size requirements and transport it to an automated magnetic separator. Send the fine raw sand that does not meet the particle size requirements back to the ball mill for further grinding.

5. The automated processing method for quartz sand according to claim 1, characterized in that: Step S4 further includes the following sub-steps: S4-1, the sampling equipment uniformly samples fine-grained raw sand from the automated ball mill to obtain raw sand samples. The sampling equipment includes an X-ray fluorescence spectrometer, an infrared spectrometer, and a data processing unit. S4-2, X-ray fluorescence spectrometer detects the type and content of metal impurities in the raw sand sample, and infrared spectrometer detects the type and content of organic impurities in the raw sand sample; S4-3, The data processing unit performs data fusion on the metal impurity type, metal impurity content, organic impurity type and organic impurity content through a multi-sensor data fusion algorithm to obtain data-based impurity information; S4-4, The data-driven impurity information is feature-extracted using principal component analysis to generate raw sand impurity measurement information, which includes magnetic separation impurity characteristics and acid leaching impurity characteristics. The raw sand impurity measurement information is then sent to the automated magnetic separation equipment and the acid leaching reaction equipment.

6. The automated processing method for quartz sand according to claim 1, characterized in that: Step S5 further includes the following sub-steps: S5-1, The automated magnetic separation equipment receives fine-grained raw sand from an automated ball mill and raw sand impurity measurement information from a sampling inspection device. The automated magnetic separation equipment includes a high-gradient magnetic separator and a magnetic separation control unit. S5-2, The magnetic separation control unit extracts the magnetic separation impurity characteristics from the raw sand impurity measurement information, and sets the high gradient magnetic separator operating parameters according to the magnetic separation impurity characteristics. The high gradient magnetic separator operating parameters include magnetic field strength and material flow rate. S5-3, the magnetic separation control unit controls the high gradient magnetic separator to perform magnetic separation on the fine-grained raw sand according to the operating parameters of the high gradient magnetic separator, so as to remove magnetic iron impurities in the fine-grained raw sand and obtain first-grade purified quartz sand. S5-4, the primary purified quartz sand is transported to the acid leaching reaction equipment.

7. The automated processing method for quartz sand according to claim 1, characterized in that: Step S6 further includes the following sub-steps: S6-1, the acid leaching reaction equipment receives primary purified quartz sand from the automated magnetic separation equipment and raw sand impurity measurement information from the sampling inspection equipment. The acid leaching reaction equipment includes a fiberglass reactor, a stirring device, a heating device, a centrifugal device, and an acid leaching control unit. S6-2, the acid leaching control unit extracts the acid leaching impurity characteristics from the raw sand impurity measurement information, selects the type, concentration and amount of acid solution according to the acid leaching impurity characteristics, and inputs the corresponding type, concentration and amount of acid solution into the fiberglass reactor; S6-3, the primary purified quartz sand is acid-leached through a fiberglass reactor to obtain acid-leached primary purified quartz sand and acid solution after reaction. During the acid leaching process, the primary purified quartz sand and acid solution are stirred and mixed by a stirring device, and the temperature inside the fiberglass reactor is controlled within the range of ≥85℃ and ≤90℃ by a heating device. S6-4 After acid leaching, the primary purified quartz sand after acid leaching and the acid solution after reaction are separated by a centrifuge to obtain the separated primary purified quartz sand. S6-5, the separated primary purified quartz sand is washed multiple times with a weak alkaline solution and water to obtain secondary purified quartz sand; S6-6, the secondary purified quartz sand is transported to the high-temperature roasting equipment.

8. The automated processing method for quartz sand according to claim 1, characterized in that: Step S7 further includes the following sub-steps: S7-1, the high-temperature roasting equipment receives secondary purified quartz sand from the acid leaching reaction equipment, the high-temperature roasting equipment includes a high-temperature roasting furnace, a roasting control unit, a waste heat recovery unit and a waste gas treatment unit; S7-2, preset high-temperature roasting furnace operating parameters, the high-temperature roasting furnace operating parameters include preheating temperature, preheating time, roasting temperature, roasting time, holding time and cooling time; S7-3, the roasting control unit controls the high-temperature roasting furnace to roast the secondary purified quartz sand according to the operating parameters of the high-temperature roasting furnace, so as to obtain the tertiary purified quartz sand, while generating waste heat and high-temperature exhaust gas. S7-4, the waste heat recovery unit collects the waste heat generated in the high-temperature roasting furnace during the roasting process, performs energy conversion and energy storage on the waste heat, and obtains recovered thermal energy; S7-5, the exhaust gas treatment unit condenses, desulfurizes and denitrates the high-temperature exhaust gas generated during the roasting process, and obtains and discharges purified exhaust gas; S7-6, the three-stage purified quartz sand is transported to the quality testing equipment.

9. The automated processing method for quartz sand according to claim 1, characterized in that: Step S8 further includes the following sub-steps: S8-1, the quality testing equipment receives three-stage purified quartz sand from the high-temperature roasting equipment, the quality testing equipment includes an X-ray fluorescence spectrometer, a laser particle size analyzer, an infrared moisture analyzer, and a gas chromatograph; S8-2, The silica content in the three-stage purified quartz sand is detected by the X-ray fluorescence spectrometer to obtain the purity test result; S8-3, The particle size distribution of the three-stage purified quartz sand is detected by the laser particle size analyzer to obtain the particle size detection results; S8-4, The moisture content of the three-stage purified quartz sand is detected by the infrared moisture analyzer to obtain the moisture detection result; S8-5, The content of organic impurities in the three-stage purified quartz sand is detected by the gas chromatograph to obtain the impurity detection results; S8-6. Based on the purity test results, particle size test results, moisture test results, and impurity test results, a quality test report is generated and sent to relevant management and maintenance personnel.

10. An automated processing system for quartz sand, characterized in that, include: Screening equipment: used for preliminary screening of quartz sand raw materials to obtain raw sand; Pre-treatment equipment: used to crush and wash raw sand to obtain pre-treated raw sand; Automated ball mill equipment: used to grind and screen pretreated raw sand to obtain fine-grained raw sand; Sampling equipment: used to detect impurities in fine-grained raw sand and obtain information on the determination of impurities in the raw sand; Automated magnetic separation equipment: used for magnetic separation and purification of fine-grained raw sand to obtain first-grade purified quartz sand; Acid leaching reaction equipment: used to leach and purify primary purified quartz sand to obtain secondary purified quartz sand; High-temperature roasting equipment: used to roast and purify secondary purified quartz sand at high temperatures to obtain tertiary purified quartz sand; Quality testing equipment: Used to test the quality of tertiary purified quartz sand and obtain a quality test report.

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