Purification process of high-purity quartz sand

Abstract

The invention relates to a purification process of high-purity quartz sand applied to the field of quartz sand purification. The purification process comprises the following steps: S1, raw material treatment; s2, calcining and cooling; s3, carrying out microbiological leaching; s4, performing magnetic separation and impurity removal; the efficient magnetic separation equipment comprises a main magnetic separator, an auxiliary magnetic separator and an intelligent magnetic separation detector, a guide plate fixed to a mounting base is vertically inserted into a shell, a detection cylinder is fixed to the top of the shell, an insertion rod fixed to the guide plate is inserted into the top of the detection cylinder, and a pressure sensor is mounted in an inner cavity of the detection cylinder; with the adoption of the technical scheme, the weight of the magnetic impurities adsorbed on the magnetic corrugated plate can be obtained in real time through the impurity detection module mounted on the intelligent magnetic separation detector, and the adsorption quantity of the magnetic impurities on the magnetic corrugated plate can be accurately detected, so that the main magnetic separator and the auxiliary magnetic separator are accurately cleaned; the production efficiency and the purity of the purified quartz sand are improved.

Description

Technical Field

[0001] The invention relates to the technical field of quartz sand purification, in particular to a purification process of high-purity quartz sand. Background Art

[0002] Quartz sand is quartz particles made by crushing quartz stone. Quartz stone is a non-metallic mineral, a hard, wear-resistant, chemically stable silicate mineral, whose main mineral component is SiO2. Quartz sand is an important industrial mineral raw material, non-chemical hazardous goods, widely used in glass, casting, ceramics and fireproof materials, smelting ferrosilicon, metallurgical flux, metallurgy, construction, chemical industry, plastics, rubber, abrasives, filter materials and other industries. The unique physical and chemical properties of quartz sand make it play an important role in aviation, aerospace, electronics, machinery and today's rapidly developing IT industry. In particular, its inherent molecular chain structure, crystal shape and lattice change law make it have high temperature resistance, small thermal expansion coefficient, high insulation, corrosion resistance, piezoelectric effect, resonance effect and its unique optical properties, which play an increasingly important role in many high-tech products.

[0003] In the prior art, there is a Chinese invention patent with application number CN201710851659.1 for a process for processing and purifying high-purity quartz sand tailings. When purifying quartz sand, the quartz sand raw material is mainly purified through the steps of roughing-cleaning-drying, calcination, water quenching-crushing, magnetic separation-electrostatic separation, pickling, cleaning-drying, etc. The magnetic impurities in the quartz sand are removed by magnetic separation. The traditional magnetic separation method is usually to pass the quartz sand raw material through a magnetic filter plate with controllable magnetism. The magnetic impurities in the quartz sand raw material are magnetically filtered by the magnetic filter plate, and then regularly Clean the magnetic separation filter plate in the magnetic separation device to remove the magnetic impurities adsorbed on the magnetic separation filter plate. The traditional cleaning procedure is usually to clean the magnetic separation device regularly or according to the filtration volume of the magnetically separated quartz sand raw material. Since the content of magnetic impurities in the quartz sand raw materials flowing through different batches and different time periods is uneven, the content of magnetic impurities adsorbed on the magnetic separation filter plate is different in each cleaning cycle. When the content is low, the cleaning cycle will be frequent, affecting the production efficiency. When the content is high, the magnetic separation filtration method of the quartz sand raw material will be ineffective, affecting the purity of the produced quartz sand.

[0004] Application Contents

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the content of magnetic impurities in the quartz sand raw materials flowing through different batches and different time periods is uneven. Therefore, the content of magnetic impurities adsorbed on the magnetic separation filter plate in each cleaning cycle is different. When the content is low, the cleaning cycle will be frequent, affecting production efficiency. When the content is high, the magnetic separation filtration method of the quartz sand raw materials will be ineffective, affecting the purity of the produced quartz sand.

[0006] In order to solve the above problems, the present invention provides a purification process of high-purity quartz sand, comprising the following steps:

[0007] S1. Raw material processing: After ball milling and screening the quartz sand raw material, the quartz sand raw material is washed with deionized water and then dried;

[0008] S2, calcination cooling: the treated quartz sand raw material is subjected to microwave heating, and then calcined at a constant temperature, and naturally cooled to room temperature after the calcination. The microwave heating temperature is 830°C-880°C, and the constant temperature calcination time is 1h-1.5h;

[0009] S3, microbial leaching: the calcined quartz sand is subjected to high temperature sterilization treatment, and then the microbial leaching solution is added, the sterilization temperature is 130°C-140°C, the sterilization time is 40min-50min, and the leaching is carried out under shaking at 28°C-30°C for 16h-18h, the filtrate is collected by filtration, the filter residue is washed with deionized water until it is neutral, and dried to obtain microbial leached quartz sand;

[0010] S4, magnetic separation and impurity removal: ball milling and screening of the quartz sand leached by microorganisms, and then transporting the quartz sand to a high-efficiency magnetic separation device for magnetic separation and impurity removal to obtain high-purity quartz sand;

[0011] The high-efficiency magnetic separation equipment includes: a main magnetic separator, an auxiliary magnetic separator and an intelligent magnetic separation detector. The main magnetic separator and the auxiliary magnetic separator are symmetrically arranged. The main magnetic separator and the auxiliary magnetic separator both include a shell, an input port installed on the top of the shell, an output port installed on the bottom of the shell, and a magnetic separation mechanism installed in the middle of the shell. The magnetic separation mechanism includes a mounting seat vertically slidably connected to the shell, and a magnetic absorption corrugated plate installed on the mounting seat. A guide plate fixed to the mounting seat is vertically inserted on the shell, a detection cylinder is fixed on the top of the shell, a plug rod fixed to the guide plate is inserted on the top of the detection cylinder, and a pressure sensor is installed in the inner cavity of the detection cylinder;

[0012] The intelligent magnetic separation detector is provided with an impurity detection module and a reminder module. The impurity detection module is electrically connected to the reminder module, the pressure sensor and the warning button respectively. The warning button is installed under the pressure rod, and the pressure rod is fixed to the guide plate.

[0013] In the above-mentioned purification process of high-purity quartz sand, the impurity detection module installed on the intelligent magnetic separation detector can obtain the weight of the magnetic impurities adsorbed on the magnetic corrugated plate in real time, and when the magnetic impurities reach the preset value, a warning signal is issued to accurately detect the adsorption amount of magnetic impurities on the magnetic corrugated plate, thereby accurately cleaning the main magnetic separator and the auxiliary magnetic separator, improving production efficiency and the purity of the purified quartz sand.

[0014] As a further improvement of the present application, at least two guide plates are provided on each mounting seat, and two detection cylinders are correspondingly provided on each guide plate. Two adjacent detection cylinders are connected through a connecting cavity, and hydraulic oil is installed in the inner cavity of the detection cylinder.

[0015] As a further improvement of the present application, a pressure sensor is installed in the communication cavity, an early warning button is installed on the detection cylinder, and a pressure gauge is installed at corresponding positions of the detection cylinder and the communication cavity.

[0016] As a further improvement of the present application, an upper diversion groove is installed between the top of the mounting seat and the input port, and a lower diversion groove is installed between the bottom of the mounting seat and the output port. There are multiple parallel magnetic corrugated plates on the mounting seat, and the magnetic corrugated plates have a corrugated structure, and a magnetic separation channel is formed between adjacent magnetic corrugated plates.

[0017] As a further improvement of the present application, the input ports corresponding to the tops of the main magnetic separator and the auxiliary magnetic separator, and the output ports corresponding to the bottoms of the main magnetic separator and the auxiliary magnetic separator are fixed by turntables, each turntable is rotatably connected to a switching disk, and the switching disk at the input port is equipped with a filter inlet pipe and a clean inlet pipe corresponding to the positions of the two input ports, and the switching disk at the output port is equipped with a filter outlet pipe and a clean outlet pipe corresponding to the positions of the two output ports.

[0018] As another improvement of the present application, a commutation cleaning module is also provided on the intelligent magnetic separation detector, and the commutation cleaning module is electrically connected to the impurity detection module and the reminder module respectively. Each switching disk is installed on the output end of the commutation motor, and the commutation motor is electrically connected to the commutation cleaning module.

[0019] As another improved supplement of the present application, the high-efficiency magnetic separation equipment also includes a cleaning mechanism, which includes cleaning plates installed on both sides of the magnetic separation channel and in contact with the outer wall of the magnetic corrugated plate, electromagnets corresponding to the cleaning plates, and guide rods. The electromagnets are installed on the outside of the shell, and a plurality of slides corresponding to the electromagnets are connected in series on the guide rods. The electromagnets are installed on the slides, and the electromagnets are electrically connected to the reversing cleaning module.

[0020] As another improved supplement of the present application, the two slides corresponding to the magnetic separation channels are connected in series through a tension spring, the end of the guide rod is slidably connected to the shell through a cleaning plate, a cleaning cylinder is installed on the cleaning plate, and the cleaning cylinder is electrically connected to the reversing cleaning module.

[0021] To summarize, the present application can obtain the weight of magnetic impurities adsorbed on the magnetic corrugated plate in real time through the impurity detection module installed on the intelligent magnetic separation detector, and send out a warning signal when the magnetic impurities reach a preset value, and accurately detect the adsorption amount of magnetic impurities on the magnetic corrugated plate, thereby accurately cleaning the main magnetic separator and the auxiliary magnetic separator, realizing the functions of automated and intelligent magnetic separation and adsorption amount warning, and improving production efficiency and the purity of purified quartz sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a purification process flow chart of the first and second embodiments of the present application;

[0023] Figure 2 This is an overall schematic diagram of the first and second implementation modes of the present application;

[0024] Figure 3 It is an internal schematic diagram of the first and second embodiments of the present application;

[0025] Figure 4 This is a schematic diagram of the positions of the mounting seat and the guide plate of the first and second embodiments of the present application;

[0026] Figure 5 It is a cross-sectional view of the detection tube of the first and second embodiments of the present application;

[0027] Figure 6 This is a front view of the mounting base and the magnetic corrugated plate of the first and second embodiments of the present application;

[0028] Figure 7 This is a control principle block diagram of the intelligent magnetic separation detector according to the first embodiment of the present application;

[0029] Figure 8 Schematic diagram of the positions of the switching disk, the filter inlet pipe and the cleaning inlet pipe of the first and second embodiments of the present application;

[0030] Fig. 9 This is a schematic diagram of the cleaning mechanism structure of the first and second embodiments of the present application;

[0031] Fig.10 For this application Figure 8 A schematic diagram of the enlarged structure at A in the middle;

[0032] Fig.11 This is a block diagram of the control principle of the intelligent magnetic separation detector of the second embodiment of the present application.

[0033] Description of the numbers in the figure:

[0034] 1. Main magnetic separator; 2. Auxiliary magnetic separator; 3. Input port; 4. Output port; 5. Filter inlet pipe; 6. Cleaning inlet pipe; 7. Filter outlet pipe; 8. Cleaning outlet pipe; 9. Cleaning mechanism; 10. Upper diverter trough; 11. Lower diverter trough; 12. Intelligent magnetic separation detector; 13. Magnetic corrugated plate; 14. Mounting seat; 15. Guide plate; 16. Detection cylinder; 17. Insert rod; 18. Communication chamber; 19. Pressure gauge; 20. Pressure sensor; 21. Warning button; 22. Pressure rod; 23. Guide rod; 24. Cleaning plate; 25. Sliding seat; 26. Electromagnet; 27. Magnetic separation channel; 28. Tension spring; 29. ​​Switching disk. DETAILED DESCRIPTION

[0035] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0036] The first implementation method:

[0037] Figure 1-Figure 7 A purification process of high-purity quartz sand is shown, comprising the following steps:

[0038] S1. Raw material processing: After ball milling and screening the quartz sand raw material, the quartz sand raw material is washed with deionized water and then dried;

[0039] S2, calcination cooling: the treated quartz sand raw material is subjected to microwave heating, and then calcined at a constant temperature, and naturally cooled to room temperature after the calcination. The microwave heating temperature is 830°C-880°C, and the constant temperature calcination time is 1h-1.5h;

[0040] S3, microbial leaching: the calcined quartz sand is subjected to high temperature sterilization treatment, and then the microbial leaching solution is added, the sterilization temperature is 130°C-140°C, the sterilization time is 40min-50min, and the leaching is carried out under shaking at 28°C-30°C for 16h-18h, the filtrate is collected by filtration, the filter residue is washed with deionized water until it is neutral, and dried to obtain microbial leached quartz sand;

[0041] S4, magnetic separation and impurity removal: ball milling and screening of the quartz sand leached by microorganisms, and then transporting the quartz sand to a high-efficiency magnetic separation device for magnetic separation and impurity removal to obtain high-purity quartz sand;

[0042] The high-efficiency magnetic separation equipment includes: a main magnetic separator 1, a secondary magnetic separator 2 and an intelligent magnetic separation detector 12. The main magnetic separator 1 and the secondary magnetic separator 2 are symmetrically arranged. By arranging the main magnetic separator 1 and the secondary magnetic separator 2, when the adsorption amount of magnetic impurities in the main magnetic separator 1 exceeds the set value, it can be quickly replaced to the secondary magnetic separator 2 on one side to continuously perform magnetic separation on the quartz sand raw material. At this time, the magnetic impurities in the main magnetic separator 1 are cleaned to achieve rapid switching without stopping the machine. The main magnetic separator 1 and the secondary magnetic separator 2 both include a shell, an input port 3 installed on the top of the shell, an output port 4 installed on the bottom of the shell, and a The magnetic separation mechanism is installed in the middle of the shell, the magnetic separation mechanism includes a mounting seat 14 vertically slidably connected to the shell, and a magnetic corrugated plate 13 installed on the mounting seat 14. A guide plate 15 fixed to the mounting seat 14 is vertically inserted on the shell, a detection cylinder 16 is fixed on the top of the shell, and a plug rod 17 fixed to the guide plate 15 is inserted on the top of the detection cylinder 16. A pressure sensor 20 is installed in the inner cavity of the detection cylinder 16. The quartz sand raw material that needs to be magnetically separated is input through the input port 3 on the top of the main magnetic separator 1 or the top of the auxiliary magnetic separator 2. The quartz sand raw material flows through the magnetic separator on the mounting seat 14. The magnetic corrugated plate 13 is attracted and fully contacted with the quartz sand raw material. The magnetism generated by the magnetic corrugated plate 13 attracts the magnetic impurities in the quartz sand raw material, and the quartz sand raw material is magnetically separated and filtered. Since the magnetic impurities are gradually attracted to the magnetic corrugated plate 13, the weight of the magnetic corrugated plate 13 is gradually increased, and the weight of the mounting seat 14 and the magnetic corrugated plate 13 is gradually increased. When the weight of the mounting seat 14 and the magnetic corrugated plate 13 increases and gradually moves downward, the guide plate 15 and the insertion rod 17 are driven to move downward synchronously. At this time, the insertion rod 17 is gradually inserted into the inspection The inner cavity of the measuring cylinder 16 increases the pressure inside the measuring cylinder 16, and the pressure sensor 20 detects the pressure of the inner cavity of the measuring cylinder 16 in real time. A magnetic control component is installed on the magnetic corrugated plate 13, which can flexibly control whether the magnetic corrugated plate 13 generates magnetism. When cleaning the magnetic impurities adsorbed on the magnetic corrugated plate 13, the magnetic corrugated plate 13 can be controlled not to generate magnetism. This is a common technical solution in magnetic separation devices and is a prior art. The specific structure and working principle of this application will not be repeated. The magnetic impurities are removed by flushing the magnetic corrugated plate 13 with clean water.

[0043] The intelligent magnetic separation detector 12 is provided with an impurity detection module and a reminder module. The impurity detection module is electrically connected to the reminder module, the pressure sensor 20 and the warning button 21 respectively. The warning button 21 is installed below the pressure rod 22, and the pressure rod 22 is fixed to the guide plate 15.

[0044] When the quartz sand raw material is magnetically separated by the main magnetic separator 1 or the auxiliary magnetic separator 2, the quartz sand raw material flows through the magnetic corrugated plate 13, and the magnetic impurities are filtered by the magnetic adsorption generated on the magnetic corrugated plate 13. The weight of the magnetic corrugated plate 13 gradually increases and acts on the insertion rod 17 synchronously, so that the insertion rod 17 is gradually inserted into the inner cavity of the detection cylinder 16, thereby gradually increasing the pressure in the inner cavity of the detection cylinder 16. The pressure sensor 20 transmits the pressure data detected in the inner cavity of the detection cylinder 16 to the impurity detection module in real time. The impurity detection module receives the pressure data detected by the pressure sensor 20 and compares it with the preset warning pressure data (the impurity detection module is preset with the pressure data in the detection cylinder 16 when the magnetic corrugated plate 13 adsorbs the upper limit of magnetic impurities). When the impurity detection module detects that the pressure sensor 20 has reached the upper limit of magnetic impurities adsorbed by the magnetic corrugated plate 13, the impurity detection module detects that the pressure data is detected by the pressure sensor 20. When the pressure data of the sensor 20 exceeds the preset value, a reminder signal will be sent to the reminder module. After receiving the reminder signal, the reminder module will emit an audible and visual reminder to remind the corresponding main magnetic separator 1 or auxiliary magnetic separator 2 that the amount of magnetic impurities adsorbed has reached the warning value, and remind the operator to switch. In addition, the guide plate 15 drives the insertion rod 17 to move downward synchronously, and drives the corresponding pressure rod 22 to move downward. When the guide plate 15 moves downward beyond the maximum value, that is, the maximum value of the magnetic impurities adsorbed on the magnetic corrugated plate 13, the pressure rod 22 contacts the warning button 21. At this time, the warning button 21 sends an alarm signal to the impurity detection module. At this time, the impurity detection module sends a reminder signal to the reminder module after receiving the alarm signal. After receiving the reminder signal, the reminder module emits an audible and visual reminder to remind the operator to come and deal with it quickly.

[0045] The detection tube 16 can guide and buffer the insertion rod 17, and the guide plate 15 can buffer the magnetic corrugated plate 13 and the mounting seat 14. When filtering the quartz sand raw material, the magnetic corrugated plate 13 and the mounting seat 14 are ensured to be stable in position. Since the quartz sand raw material generates an impact force on the magnetic corrugated plate 13 when flowing through the magnetic corrugated plate 13 under different flow rates, the quartz sand raw material can be set to flow through the magnetic corrugated plate 13 at a constant flow rate, and the impact force on the magnetic corrugated plate 13 under this state can be determined. The impact force is obtained, and the pressure data in the detection cylinder 16 in this state is determined. This data can be input into the impurity detection module and recorded as the initial value of the magnetic corrugated plate 13 without adsorbing magnetic impurities, so as to calculate the weight increment of the magnetic corrugated plate 13 after continuous adsorption of magnetic impurities, and obtain the data of whether the magnetic impurities on the magnetic corrugated plate 13 reach the preset value, so as to accurately detect the adsorption amount of magnetic impurities on the magnetic corrugated plate 13, thereby accurately cleaning the main magnetic separator 1 and the auxiliary magnetic separator 2, and improving the production efficiency and the purity of the purified quartz sand.

[0046] In this embodiment, at least two guide plates 15 are provided on each mounting seat 14, and each guide plate 15 is correspondingly provided with two detection cylinders 16, which can improve the stability of the guide plate 15 in the vertical moving state, and the magnetic absorption corrugated plate 13 and the mounting seat 14 are stably supported by multiple detection cylinders 16 and insertion rods 17, thereby improving the impact force of the magnetic absorption corrugated plate 13 bearing the quartz sand raw material. Two adjacent detection cylinders 16 are connected through a connecting cavity 18, and the inner cavity of the detection cylinder 16 is installed with hydraulic oil, thereby improving the stability of the combined structure of the detection cylinder 16 and the insertion rod 17, and To improve the stability of the guide plate 15 in the vertical movement state, the pressure sensor 20 is installed in the communication chamber 18. The pressure data of the hydraulic oil in the detection cylinder 16 can be detected by the pressure sensor 20, and the data can be accurately transmitted to the impurity detection module. The early warning button 21 is installed on the detection cylinder 16. The pressure gauge 19 is installed at the corresponding position of the detection cylinder 16 and the communication chamber 18. The pressure gauge 19 can reflect the pressure value in the communication chamber 18, which is convenient for on-site operators to understand the pressure data in the detection cylinder 16 in real time and convenient for viewing during manual inspection.

[0047] In addition, an upper diverter groove 10 is installed between the top of the mounting seat 14 and the input port 3, and a lower diverter groove 11 is installed between the bottom of the mounting seat 14 and the output port 4. The material entering through the input port 3 is evenly dispersed into the gap between adjacent magnetic corrugated plates 13 through the upper diverter groove 10, flows into the lower diverter groove 11 through the bottom gap, and is discharged through the output port 4. There are multiple parallel magnetic corrugated plates 13 on the mounting seat 14, and the magnetic corrugated plates 13 have a corrugated structure, which can improve the moving path of the quartz sand raw material in the magnetic corrugated plates 13 and fully contact with the corrugated magnetic corrugated plates 13. A magnetic separation channel 27 is formed between adjacent magnetic corrugated plates 13, and the quartz sand raw material flows through the magnetic separation channel 27.

[0048] The second implementation method:

[0049] Figure 8-Figure 11As shown, unlike the first embodiment, the input port 3 corresponding to the top of the main magnetic separator 1 and the auxiliary magnetic separator 2, and the output port 4 corresponding to the bottom of the main magnetic separator 1 and the auxiliary magnetic separator 2 are fixed by a turntable, each turntable is rotatably connected with a switching disk 29, and the switching disk 29 at the input port 3 is installed with a filter inlet pipe 5 and a cleaning inlet pipe 6 corresponding to the positions of the two input ports 3, and the switching disk 29 at the output port 4 is installed with a filter outlet pipe 7 and a cleaning outlet pipe 8 corresponding to the positions of the two output ports 4, and the quartz sand raw material is input into the input port 3 through the filter inlet pipe 5. , and discharged through the output port 4 and the filter outlet pipe 7, thereby realizing magnetic separation and filtration of the quartz sand raw material; the cleaning liquid enters the input port 3 through the cleaning inlet pipe 6, and is discharged through the output port 4 and the cleaning outlet pipe 8, thereby realizing the cleaning of the magnetic absorption corrugated plate 13; when it is necessary to clean the main magnetic separator 1 or the auxiliary magnetic separator 2 in use, the positions of the filter inlet pipe 5 and the cleaning inlet pipe 6, as well as the filter outlet pipe 7 and the cleaning outlet pipe 8 can be switched by rotating the switching disk 29, thereby switching the magnetic separation and filtration mode to the cleaning mode, reducing downtime, and realizing magnetic separation and filtration and impurity cleaning simultaneously, thereby improving magnetic separation efficiency.

[0050] In this embodiment, a reversing cleaning module is also provided on the intelligent magnetic separation detector 12, and the reversing cleaning module is electrically connected to the impurity detection module and the reminder module respectively. Each switching disk 29 is installed on the output end of the reversing motor, and the reversing motor is electrically connected to the reversing cleaning module. When the impurity detection module detects that the pressure data of the pressure sensor 20 exceeds the preset value, it will simultaneously send a switching signal to the reversing cleaning module. At this time, the reversing cleaning module will control the reversing motor to work after receiving the reversing signal. The reversing motor controls the switching disk 29 to rotate a specified angle, thereby switching the main magnetic separator 1 or the auxiliary magnetic separator 2 from the magnetic separation and filtration mode to the cleaning mode. The cleaning liquid enters the input port 3 through the cleaning inlet pipe 6 to rinse and clean the magnetic corrugated plate 13, and when rinsing and cleaning the magnetic corrugated plate 13, the magnetic corrugated plate 13 is controlled not to emit magnetism, so as to facilitate the separation of magnetic impurities from the magnetic corrugated plate 13, thereby achieving the purpose of automatically cleaning the magnetic separation mechanism.

[0051] In addition, the high-efficiency magnetic separation equipment also includes a cleaning mechanism 9, which includes a cleaning plate 24 installed on both sides of the magnetic separation channel 27 and in contact with the outer wall of the magnetic corrugated plate 13, an electromagnet 26 corresponding to the cleaning plate 24, and a guide rod 23. The electromagnet 26 is installed on the outer side of the shell, and a plurality of slides 25 corresponding to the electromagnet 26 are connected in series on the guide rod 23. The electromagnet 26 is installed on the slide 25. The cleaning plate 24 moves along the outer wall of the magnetic corrugated plate 13, and the impurities adhered to the outer wall of the magnetic corrugated plate 13 are scraped and cleaned by physical scraping. When it is necessary to control the cleaning plate 24 to move along the outer wall of the magnetic corrugated plate 13, the cleaning plate 24 is moved along the outer wall of the magnetic corrugated plate 13. By controlling the operation of the electromagnet 26, a magnetic force is formed between the electromagnet 26 and the cleaning plate 24. At this time, the cleaning plate 24 can be driven to move synchronously by moving the electromagnet 26, so as to control the cleaning plate 24 to move along the outer wall of the magnetic corrugated plate 13 to scrape off impurities. When the magnetic corrugated plate 13 adsorbs the quartz sand raw material, the electromagnet 26 does not generate magnetism. Since the electromagnet 26 and the cleaning plate 24 are non-contactly arranged, no external force is generated on the cleaning plate 24, which can reduce the impact on the magnetic corrugated plate 13 and increase the accuracy of the pressure sensor 20 in detecting the amount of impurities attached to the magnetic corrugated plate 13. The electromagnet 26 is electrically connected to the reversing cleaning module.

[0052] In addition, the two slide seats 25 corresponding to the magnetic separation channel 27 are connected in series through a tension spring 28, and the end of the guide rod 23 is slidably connected to the shell through a cleaning plate 24. A cleaning cylinder is installed on the cleaning plate 24, and the cleaning cylinder is electrically connected to the reversing cleaning module. After the reversing cleaning module executes the reversing signal sent by the impurity detection module, the reversing cleaning module controls the electromagnet 26 to energize to generate magnetism and control the cleaning cylinder to work. The cleaning cylinder drives the cleaning plate 24 and the guide rod 23 to move back and forth vertically. At this time, the electromagnet 26 that moves with the guide rod 23 drives the cleaning plate 2 The cleaning plates 24 move synchronously along the outer wall of the magnetic corrugated plate 13, and the tension spring 28 is arranged so that the two electromagnets 26 corresponding to the magnetic separation channel 27 always have a tendency to move to both sides, thereby synchronously driving the two cleaning plates 24 to be close to the side walls of the magnetic corrugated plate 13 located on both sides of the magnetic separation channel 27, so as to better clean the side walls of the magnetic corrugated plate 13, and after cleaning is completed, the reversing cleaning module sends a reminder signal of cleaning completion to the reminder module, and the reminder module sends an audible and visual reminder after receiving the reminder signal to remind the operator that cleaning is completed.

[0053] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A purification process for high-purity quartz sand, characterized in that: The following steps are involved: S1. Raw material processing: After ball milling and screening the quartz sand raw material, the quartz sand raw material is washed with deionized water and then dried; S2, calcination cooling: the treated quartz sand raw material is subjected to microwave heating, and then calcined at a constant temperature, and naturally cooled to room temperature after the calcination. The microwave heating temperature is 830°C-880°C, and the constant temperature calcination time is 1h-1.5h; S3, microbial leaching: the calcined quartz sand is subjected to high temperature sterilization treatment, and then the microbial leaching solution is added, the sterilization temperature is 130°C-140°C, the sterilization time is 40min-50min, and the leaching is carried out under shaking at 28°C-30°C for 16h-18h, the filtrate is collected by filtration, the filter residue is washed with deionized water until it is neutral, and dried to obtain microbial leached quartz sand; S4, magnetic separation and impurity removal: ball milling and screening of the quartz sand leached by microorganisms, and then transporting the quartz sand to a high-efficiency magnetic separation device for magnetic separation and impurity removal to obtain high-purity quartz sand; The high-efficiency magnetic separation device comprises: a main magnetic separator (1), a secondary magnetic separator (2) and an intelligent magnetic separation detector (12); the main magnetic separator (1) and the secondary magnetic separator (2) are symmetrically arranged; the main magnetic separator (1) and the secondary magnetic separator (2) both comprise a shell, an input port (3) mounted on the top of the shell, an output port (4) mounted on the bottom of the shell, and a magnetic separation mechanism mounted in the middle of the shell; the magnetic separation mechanism comprises a mounting seat (14) vertically slidably connected to the shell, and a magnetic absorption corrugated plate (13) mounted on the mounting seat (14); a guide plate (15) fixed to the mounting seat (14) is vertically inserted on the shell; a detection cylinder (16) is fixed to the top of the shell; a plug rod (17) fixed to the guide plate (15) is inserted on the top of the detection cylinder (16); a pressure sensor (20) is installed in the inner cavity of the detection cylinder (16); The intelligent magnetic separation detector (12) is provided with an impurity detection module and a reminder module, the impurity detection module is electrically connected to the reminder module, the pressure sensor (20) and the warning button (21) respectively, the warning button (21) is installed below the pressure rod (22), and the pressure rod (22) is fixed to the guide plate (15).

2. A purification process for high-purity quartz sand according to claim 1, characterized in that: At least two guide plates (15) are arranged on each mounting seat (14), and two detection cylinders (16) are correspondingly arranged on each guide plate (15). Two adjacent detection cylinders (16) are connected via a connecting cavity (18), and hydraulic oil is installed in the inner cavity of the detection cylinder (16).

3. A purification process for high-purity quartz sand according to claim 2, characterized in that: The pressure sensor (20) is installed in the communication chamber (18), the warning button (21) is installed on the detection cylinder (16), and a pressure gauge (19) is installed at corresponding positions of the detection cylinder (16) and the communication chamber (18).

4. A purification process for high-purity quartz sand according to claim 3, characterized in that: An upper shunt groove (10) is installed between the top of the mounting seat (14) and the input port (3), and a lower shunt groove (11) is installed between the bottom of the mounting seat (14) and the output port (4). A plurality of magnetic corrugated plates (13) are arranged in parallel on the mounting seat (14), and the magnetic corrugated plates (13) are in a corrugated structure, and magnetic separation channels (27) are formed between adjacent magnetic corrugated plates (13).

5. A purification process for high-purity quartz sand according to claim 4, characterized in that: The input ports (3) correspondingly arranged at the top of the main magnetic separator (1) and the auxiliary magnetic separator (2), and the output ports (4) correspondingly arranged at the bottom of the main magnetic separator (1) and the auxiliary magnetic separator (2) are fixed to each other via a turntable, and each of the turntables is rotatably connected to a switching disk (29), and the switching disk (29) at the input port (3) is provided with a filter inlet pipe (5) and a clean inlet pipe (6) corresponding to the positions of the two input ports (3), and the switching disk (29) at the output port (4) is provided with a filter outlet pipe (7) and a clean outlet pipe (8) corresponding to the positions of the two outlet ports (4).

6. A purification process for high-purity quartz sand according to claim 5, characterized in that: The intelligent magnetic separation detector (12) is also provided with a commutation cleaning module, which is electrically connected to the impurity detection module and the reminder module respectively, and each of the switching disks (29) is installed on the output end of the commutation motor, and the commutation motor is electrically connected to the commutation cleaning module.

7. A purification process for high-purity quartz sand according to claim 6, characterized in that: The high-efficiency magnetic separation device also includes a cleaning mechanism (9), which includes a cleaning plate (24) installed on both sides of the magnetic separation channel (27) and in contact with the outer wall of the magnetic corrugated plate (13), an electromagnet (26) corresponding to the cleaning plate (24), and a guide rod (23), wherein the electromagnet (26) is installed on the outer side of the shell, and a plurality of slide seats (25) corresponding to the electromagnet (26) are connected in series on the guide rod (23), the electromagnet (26) is installed on the slide seat (25), and the electromagnet (26) is electrically connected to the reversing cleaning module.

8. A purification process for high-purity quartz sand according to claim 7, characterized in that: The two slide seats (25) corresponding to the magnetic selection channel (27) are connected in series via a tension spring (28); the end of the guide rod (23) is slidably connected to the shell via a cleaning plate (24); a cleaning cylinder is installed on the cleaning plate (24); and the cleaning cylinder is electrically connected to the reversing cleaning module.

Images