Method and device for removing gas-liquid inclusion in quartz sand

Abstract

The invention discloses a method and a device for removing gas-liquid inclusion in quartz sand. The method comprises the following steps: S1, roasting quartz raw ore; s2, carrying out water quenching and high-voltage electric pulse treatment on the quartz ore subjected to roasting treatment in S1; and S3, purifying the quartz ore obtained in the step S2 to obtain the high-purity quartz sand. According to the method, when the quartz is treated through high-voltage electric pulse water quenching, plasma explosion, thermal stress expansion and the like are generated on a mineral interface, then shock waves and a destructive power field are formed, cracks are generated and expanded, and expansion cracks are generated on the mineral interface in ores while monomers dissociate the quartz and gangue minerals are removed; a discharge channel is established for gas-liquid inclusions and impurities wrapped by the gas-liquid inclusions, damage to aggregative fluid inclusions on the surface layers of quartz particles is intensified, and a high-purity quartz sand raw material with higher quality is provided for semiconductors and photovoltaic quartz glass products.

Description

Technical Field

[0001] The invention relates to the technical field of quartz sand purification, in particular to a method and device for removing gas-liquid inclusions in quartz sand. Background Art

[0002] With the rapid development of high-tech fields of silicon-based new materials, especially the development of semiconductors, photovoltaics, aviation technology, and electronics industries, the requirements for high-purity quartz sand raw materials are becoming increasingly higher.

[0003] Compared to natural crystal, ordinary quartz ore contains not only numerous impurities but also numerous gas-liquid inclusions. These inclusions are mineralizing and diagenetic solutions (fluids containing gas and liquid, or silicate melts) that become trapped within lattice defects during the mineral's crystallization and growth, remaining trapped within the primary mineral and forming phase boundaries with it. Existing technologies can remove associated impurities such as magnetic impurities, feldspar, and mica through purification processes, but remain unable to address the tiny gas-liquid inclusions within high-purity quartz sand crystals. Existing data indicates that the gas-liquid inclusion content in high-purity quartz sand imported from quartz mines in Angola, Madagascar, and other regions remains above 120 ppm, failing to meet the performance requirements of high-end silicon-based materials. At present, the removal of fluid inclusions in quartz ores such as pegmatite and vein quartz is often carried out by high-temperature explosion, high-temperature vacuum, chlorination roasting and other methods combined with acid leaching. These methods may be effective in separating secondary and pseudo-secondary fluid inclusions, but are less effective in separating tiny primary inclusions in high-quality quartz, with high energy consumption and cumbersome operation.

[0004] Chinese patent application number 201210080340.0 discloses a method for removing gas-liquid inclusions and impurities in the production of high-purity quartz sand. The method involves roughing quartz ore, roasting it at 860°C to 900°C for 4 hours, and then quenching it in an aqueous solution of 1% to 5% ammonium chloride or ammonium nitrate. The process then proceeds with crushing and classification, flotation, deionized water washing, and sand drying. This method demonstrates a moderate removal effect on gas-liquid inclusions. However, inclusions of different origins have different thermal stabilities and rupture conditions. Furthermore, when gas-liquid inclusions are scattered and complex, a single roasting and quenching heat treatment cannot simultaneously remove all types of inclusions.

[0005] Therefore, it is necessary to develop a method that is more effective in removing tiny primary inclusions in quartz sand. Summary of the Invention

[0006] In view of the above shortcomings, the purpose of the present invention is to provide a method and device for removing gas-liquid inclusions in quartz sand, so as to solve the technical problem that the existing process is difficult to effectively remove gas-liquid inclusions in quartz sand.

[0007] To achieve the above object, the present invention is implemented through the following technical solutions: In a first aspect, the present invention provides a method for removing gas-liquid inclusions in quartz sand, comprising the following steps: S1. Roasting the quartz ore; S2 S1 obtained after the roasting of quartz ore was water quenched and high-voltage electric pulse treatment; S3. Purify the quartz ore obtained in S2 to obtain high-purity quartz sand.

[0008] Preferably, in step S1, the calcination temperature is 850-1000° C., and the calcination time is 10-30 min.

[0009] Preferably, in step S2, the conditions for high-voltage electric pulse treatment include: the ball gap spacing is 15-35 mm, the number of pulses is 100-300, and the input voltage is 60-100 V.

[0010] Preferably, in step S3, the purification process includes: subjecting the quartz ore obtained in S2 to crushing, screening, magnetic separation, scrubbing, flotation, drug removal, acid leaching and water washing in sequence.

[0011] In the second aspect, the present invention provides a device for removing gas-liquid inclusions in quartz sand, which is used to perform the method for removing gas-liquid inclusions in quartz sand described in the first aspect, and includes a roasting furnace, a high-voltage electric pulse water quenching device and a purification device; the high-voltage electric pulse water quenching device includes an insulating base, an insulating cavity, a pulse power supply, a screen, a high-voltage electrode and a grounding electrode; the insulating cavity is connected to the insulating base and is used to contain water and quartz ore; the grounding electrode is installed in the insulating cavity and is connected to the screen to form a crushing cavity; one end of the high-voltage electrode is installed at the inner bottom of the cavity, and the other end passes through the screen to the crushing cavity; the high-voltage end of the pulse power supply is connected to the high-voltage electrode through a wire, and its grounding end is connected to the grounding electrode through a wire to form a loop; the discharge port of the roasting furnace is connected to the crushing cavity; and the purification device is connected to the insulating cavity.

[0012] Preferably, the above device further comprises a conveying device, which is installed at the inner bottom of the insulating cavity and is used to transport the quartz ore after water quenching and high-voltage electric pulse treatment out of the high-voltage electric pulse water quenching device.

[0013] Preferably, the insulating cavity is provided with a water inlet device and a water outlet device for replacing the water medium in the cavity.

[0014] Preferably, the insulating cavity is formed by splicing a first insulating shell and a second insulating shell, the second insulating shell is fixedly connected to the insulating base; and the grounding electrode is fixedly connected to the first insulating shell.

[0015] Preferably, the above-mentioned device also includes a central conductor connected to the high-voltage end of the pulse power supply through a wire, and the end of the central conductor away from the pulse power supply passes through the insulating base and the second insulating shell in sequence to be connected to the high-voltage electrode.

[0016] Preferably, the purification device includes a crushing unit, a screening unit, a magnetic separation unit, a scrubbing unit, a flotation unit, a drug removal unit, an acid leaching unit and a water washing unit connected in sequence.

[0017] The beneficial effects of the present invention are: 1. The present invention is based on the fact that different accompanying impurity minerals and fluid inclusions in quartz raw materials have significant differences in electrical properties such as dielectric constant and conductivity. When quartz is treated with high-voltage electric pulse water quenching, plasma explosions and thermal stress expansion are generated at the mineral interface, thereby forming shock waves and destructive force fields, causing cracks to form and expand. While dissociating quartz monomers and removing gangue minerals, extended cracks are generated on the mineral interfaces within the ore, establishing discharge channels for gas-liquid inclusions and the impurities they enclose, and intensifying the destruction of aggregated fluid inclusions on the surface of quartz particles, thereby obtaining ultra-high-purity quartz sand with a lower inclusion content.

[0018] 2. The device provided by the present invention adopts a continuous design for the roasting furnace and the high-voltage electric pulse water quenching equipment, which can continuously and uninterruptedly roast and water-quench the quartz ore to a suitable particle size level, realize rapid operation, and is suitable for industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments.

[0020] Figure 1 This is a flow chart of a method for removing gas-liquid inclusions in quartz sand according to an embodiment of the present invention; Figure 2 Schematic diagram of a device for removing gas-liquid inclusions in quartz sand according to an embodiment of the present invention; Figure 3 Schematic diagram of a purification device according to an embodiment of the present invention; In the figure, 1. roasting furnace; 2. high-voltage electric pulse water quenching device; 21. insulating base; 22. insulating cavity; 221. first insulating shell; 222. second insulating shell; 223. water inlet device; 224. water outlet device; 23. screen; 24. pulse power supply; 25. high-voltage electrode; 26. grounding electrode; 27. center conductor; 28. conveying device; 3. purification device; 31. crushing unit; 32. screening unit; 33. magnetic separation unit; 34. scrubbing unit; 35. flotation unit; 36. drug removal unit; 37. acid leaching unit; 38. water washing unit. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0022] In response to the technical problem that conventional roasting and water quenching methods are difficult to simultaneously meet the requirements for removing all types of inclusions, the purpose of the present invention is to provide a method and device for reducing the content of gas and liquid inclusions in quartz sand using high-voltage electric pulses, significantly improving the inclusion removal rate and providing higher quality high-purity quartz sand raw materials for semiconductor and photovoltaic quartz glass products.

[0023] High-voltage electric pulse technology uses the mechanical effects of shock waves, jets, or plasma channels generated by pulse discharge to crack or break the ore. In addition, roasting and water quenching can cause the water molecules in the gas-liquid inclusions to generate a large pressure at the interface, which can effectively burst the inclusions. The acid leaching process can remove the impurities remaining after the inclusions burst, thus achieving the purpose of removing gas-liquid inclusions. In view of this, on the first aspect, such as Figure 1 As shown, the embodiment of the present application provides a method for removing gas-liquid inclusions in quartz sand, comprising the following steps: S1. calcining the quartz ore at 850-1000°C for 10-30 min.

[0024] S2. The quartz ore obtained in S1 after the calcination treatment is water quenched and subjected to high-voltage electric pulse treatment under the conditions of a ball gap spacing of 15-35 mm, a pulse number of 100-300, and an input voltage of 60-100 V.

[0025] S3. Purify the quartz ore obtained in S2 to obtain high-purity quartz sand.

[0026] In step S3, the quartz ore is purified by using a traditional quartz sand purification process, including: crushing, screening, magnetic separation, scrubbing, flotation, drug removal, acid leaching and water washing operations. Specifically: the quartz ore obtained in S2 is put into a jaw crusher for coarse crushing, the coarsely crushed minerals are put into a roller crushing and screening machine for fine crushing, and the crushed samples are put into a screening machine to select 60~160 mesh quartz sand particles; a periodic pulsating high gradient magnetic separator is used to perform high gradient magnetic separation on the quartz sand to remove magnetic impurities, and the magnetic field strength range of the magnetic separator is 1.0~2.0T, and the pulsating frequency is 50-100Hz; a dilute hydrochloric acid with a concentration of 10% is used, and a scrubbing machine is used to scrub to remove surface attachments and some non-magnetic impurities of the quartz particles; a flotation machine is used to scrub the quartz sand. The quartz sand is subjected to multi-stage reverse flotation to remove impurities until no impurity particles float out, and then subjected to drug removal treatment. The flotation agent can be any flotation agent used in the art. The number of scrubbing and flotation stages depends on the actual situation. The obtained quartz sand is acid-leached with a mixed acid of hydrochloric acid: hydrofluoric acid in a ratio of 3:1. The inclusion impurities are removed by acid leaching through the impurity removal channel opened in step S2. The acid leaching temperature is 60-120°C and the acid leaching time is 10-16 hours. The leached quartz sand is washed with ultrapure water and dried to obtain a high-quality, low-inclusion ultra-high purity quartz sand product.

[0027] The principle of this invention is that high-voltage electric pulse crushing is a new technology for crushing solid materials using high-voltage discharge in an insulating liquid. After high-temperature quenching and water quenching, the high-voltage electric pulse treatment of the quartz ore utilizes the significant differences in electrical properties, such as dielectric constant and conductivity, between the associated impurity minerals and fluid inclusions in the quartz ore and the quartz. Discharge channels tend to develop along the mineral interfaces, generating plasma explosions and thermal stress expansion at these interfaces, which in turn form shock waves, causing cracks and expansion. This ultimately causes macroscopic rupture of the ore and cracks in the interfaces between the gas-liquid inclusions and impurities, effectively opening the gas-liquid inclusions and establishing channels for the removal of impurities from the internal inclusions. Although the gas-liquid inclusions have been opened, impurities still remain within the broken inclusions. Acid leaching using a mixed acid of hydrochloric acid and hydrofluoric acid dissolves the remaining impurities along the internal inclusion removal channels established by the high-voltage electric pulse treatment. This effectively removes gas-liquid inclusions from tiny crystals within the high-purity quartz sand, resulting in high-quality, low-inclusion ultra-high-purity quartz sand.

[0028] Second, please refer to Figures 2 and 3, an embodiment of the present application provides a device for removing gas-liquid inclusions in quartz sand, comprising: a roasting furnace 1, a high-voltage electric pulse water quenching device 2 and a purification device 3. The high-voltage electric pulse water quenching device 2 comprises an insulating base 21, an insulating cavity 22, a screen 23, a pulse power supply 24, a high-voltage electrode 25, a grounding electrode 26 and a central conductor 27. Among them, the insulating cavity 22 is used to contain water and quartz ore, and is formed by splicing a first insulating shell 221 and a second insulating shell 222, and the second insulating shell 222 is fixedly connected to the insulating base 21. There are two grounding electrodes 26, which are respectively fixedly connected to the first insulating shell 221 and are located inside the insulating cavity 22. The two ends of the screen 23 are respectively fixedly mounted on the two grounding electrodes 26, and form a crushing cavity with the two grounding electrodes 26. A water inlet device 223 and a water outlet device 224 are provided on the insulating cavity 22 for replacing the water medium in the cavity. Central conductor 27 is connected to the high-voltage terminal of pulse power supply 24 via a wire. Its other end passes through insulating base 21 and second insulating housing 222, respectively, to connect to high-voltage electrode 25. The other end of high-voltage electrode 25 passes through screen 23 and into the crushing chamber. The ground terminal of pulse power supply 24 is connected to ground electrode 26 via a wire, forming a circuit. The discharge port of roasting furnace 1 is connected to the crushing chamber, and purification device 3 is connected to insulating chamber 22.

[0029] The high-voltage electric pulse water quenching device 2 also includes a conveyor 28, mounted on the inner bottom of the insulating cavity 22. This conveyor 28 is used to transport the quartz ore out of the device after water quenching and high-voltage electric pulse treatment. Specifically, the conveyor 28 can be a conveyor belt or a crawler belt composed of several chain links. Each chain link is provided with transversely arranged V-shaped grooves with a depth of 10-30 mm, and the groove spacing is dynamically designed based on the average particle size of the ore. The inner walls of the grooves feature a stepped anti-slip structure, including a guide slope at an angle of 45°-60° to the horizontal and a top flange, forming an ore-engaging cavity. Diversion holes with a diameter of 5-8 mm are provided between adjacent grooves to discharge debris and reduce material accumulation.

[0030] like Figure 3 As shown, the purification device 3 includes a crushing unit 31, a screening unit 32, a magnetic separation unit 33, a scrubbing unit 34, a flotation unit 35, a drug removal unit 36, an acid leaching unit 37 and a water washing unit 38 which are connected in sequence.

[0031] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below.

[0032] Example 1 A method for removing gas-liquid inclusions in quartz sand, using Figures 2 and 3 The device shown in FIG. specifically comprises the following steps: S1. Add No. 1 block quartz ore into roasting furnace 1, roast the quartz ore at 1000° C., and keep it warm for 30 minutes.

[0033] S2. Fill the insulating chamber 22 with water through the water inlet device 223 until the water level covers the screen 23. The roasted quartz ore obtained in S1 is placed into the crushing chamber of the high-voltage electric pulse water quenching device 2 for rapid cooling. Simultaneously, activate the pulse power supply 24, adjust the ball gap spacing to 25 mm, the number of pulses to 200, and the input voltage to 70 V, to subject the ore to high-voltage electric pulse treatment. After water quenching and high-voltage electric pulse treatment, the crushed ore passes through the screen 23 and falls onto the conveyor 28 for transport out of the device.

[0034] S3. After the quartz ore obtained in S2 enters the purification device 3, it undergoes traditional purification processes such as coarse crushing, fine crushing, screening, magnetic separation, scrubbing, flotation, drug removal, acid leaching, and water washing to obtain a high-quality, low-inclusion ultra-high purity quartz sand product.

[0035] Comparative Example 1 A method for removing gas-liquid inclusions in quartz sand comprises the following steps: S1. Add No. 1 block quartz ore into roasting furnace 1, roast the quartz ore at 1000° C., and keep it warm for 30 minutes.

[0036] S2. Fill the insulating chamber 22 with water through the water inlet 223 until the water level covers the screen 23. The roasted quartz ore obtained in S1 is placed in the crushing chamber for rapid water quenching. The pulse power supply is disabled. The quenched quartz ore passes through the screen 23 and falls onto the conveyor 28 for transport out of the system.

[0037] S3. After the quartz ore obtained in S2 enters the purification device 3, it undergoes traditional purification processes such as coarse crushing, fine crushing, screening, magnetic separation, scrubbing, flotation, drug removal, acid leaching, and water washing to obtain a high-purity quartz sand product.

[0038] Example 2 A method for removing gas-liquid inclusions in quartz sand, using Figures 2 and 3 The device shown in FIG. specifically comprises the following steps: S1. Add No. 2 block quartz ore into roasting furnace 1, roast the quartz ore at 1000°C, and keep the temperature for 30 minutes.

[0039] S2. Fill the insulating chamber 22 with water through the water inlet 223 until the water level covers the screen 23. The roasted quartz ore obtained in S1 is placed into the crushing chamber of the high-voltage electric pulse water quenching device 2 for rapid cooling. Simultaneously, activate the pulse power supply 24, adjust the ball gap spacing to 25 mm, the number of pulses to 200, and the input voltage to 75 V, to subject the ore to high-voltage electric pulse treatment. After water quenching and high-voltage electric pulse treatment, the crushed ore passes through the screen 23 and falls onto the conveyor 28 for transport out of the device.

[0040] S3. The quartz ore obtained in S2 enters purification unit 3, where it undergoes conventional purification processes such as coarse crushing, fine crushing, screening, magnetic separation, scrubbing, flotation, drug removal, acid leaching, and water washing to produce high-quality, low-inclusion ultra-pure quartz sand.

[0041] Comparative Example 2 A method for removing gas-liquid inclusions in quartz sand comprises the following steps: S1. Add No. 2 block quartz ore into roasting furnace 1, roast the quartz ore at 1000° C., and keep it warm for 30 minutes.

[0042] S2. Fill the insulating chamber 22 with water through the water inlet 223 until the water level covers the screen 23. The roasted quartz ore obtained in S1 is placed in the crushing chamber for rapid water quenching. The pulse power supply is disabled. The quenched quartz ore passes through the screen 23 and falls onto the conveyor 28 for transport out of the system.

[0043] S3. The quartz ore obtained in S2 enters the purification device 3 and undergoes conventional purification processes such as coarse crushing, fine crushing, screening, magnetic separation, scrubbing, flotation, drug removal, acid leaching, and water washing to obtain a high-purity quartz sand product.

[0044] Example 3 A method for removing gas-liquid inclusions in quartz sand, using Figures 2 and 3 The device shown in FIG. specifically comprises the following steps: S1. Add No. 3 block quartz ore into roasting furnace 1, roast the quartz ore at 1000°C, and keep it at this temperature for 20 minutes.

[0045] S2. Fill the insulating chamber 22 with water through the water inlet device 223 until the water level covers the screen 23. The roasted quartz ore obtained in S1 is placed into the crushing chamber of the high-voltage electric pulse water quenching device 2 for rapid water quenching. Simultaneously, activate the pulse power supply 24, adjust the ball gap spacing to 25 mm, the number of pulses to 200, and the input voltage to 90 V, to subject the ore to high-voltage electric pulse treatment. After water quenching and high-voltage electric pulse treatment, the crushed ore passes through the screen 23 and falls onto the conveyor 28 for transport out of the device.

[0046] S3. The quartz ore obtained in S2 enters purification unit 3, where it undergoes conventional purification processes such as coarse crushing, fine crushing, screening, magnetic separation, scrubbing, flotation, drug removal, acid leaching, and water washing to produce high-quality, low-inclusion ultra-pure quartz sand.

[0047] Comparative Example 3 A method for removing gas-liquid inclusions in quartz sand comprises the following steps: S1. Add No. 3 block quartz ore into roasting furnace 1, roast the quartz ore at 1000° C., and keep it warm for 20 minutes.

[0048] S2. Fill the insulating chamber 22 with water through the water inlet 223 until the water level covers the screen 23. The roasted quartz ore obtained in S1 is placed in the crushing chamber for rapid water quenching. The pulse power supply is disabled. The quenched quartz ore passes through the screen 23 and falls onto the conveyor 28 for transport out of the system.

[0049] S3. The quartz ore obtained in S2 enters the purification device 3 and undergoes conventional purification processes such as coarse crushing, fine crushing, screening, magnetic separation, scrubbing, flotation, drug removal, acid leaching, and water washing to obtain a high-purity quartz sand product.

[0050] Polarized light microscopy is used to count the inclusion content of 1-50μm. The polarized light microscopy test method is as follows: ① Mix and divide the high-purity quartz sand obtained in step S3, and take a certain amount of quartz sand and place it in the target area to be observed. ② Adjust the light source intensity and set the orthogonal polarization system to enhance the contrast of the inclusions. Use a low-power objective lens to locate the target area, and further use a high-power objective lens for detailed observation. ③ Use image analysis software to scan each area in the microscope field of view, automatically count and record the size in a counter or counting software, and save the image for manual review and later analysis. The counting rules are as follows: 1. Only count clearly visible inclusions. 2. For some inclusions, the focal length can be adjusted to confirm whether they are real inclusions. 3. Record the type (gas-liquid, solid, etc.) and size of the inclusions (which can be measured using the eyepiece ruler).

[0051] Transmission electron microscopy (TEM) was used to count the inclusions in the 0.1-1μm range. The TEM testing method is as follows: ① The high-purity quartz sand obtained in step S3 was mixed and divided. To prevent impurities, the sample was thinned to a thickness that the electron beam could penetrate using an ion beam. A certain amount of quartz sand was then sampled and placed in the target area to be observed. ② An appropriate accelerating voltage and beam current were selected to balance penetration and resolution to obtain a clear image. The observation area was determined using a low-power microscope, and TEM images were acquired at a high-power microscope to ensure that the inclusions were clearly visible. ③ Inclusions within the quartz grains were identified based on contrast differences in the TEM images. Image analysis software was used to count and calculate the area of ​​the inclusions. The counting rules were as follows: 1. Only clearly visible inclusions were counted. 2. For some inclusions, the magnification was adjusted to confirm their authenticity. 3. Because the TEM observation area is small and may not fully reflect the inclusion distribution of the entire quartz grain, multiple tests were performed on the sample, and the average of the test results was used as the final result.

[0052] Table 1 Statistical data of inclusions in the products of Examples and Comparative Examples

[0053] From the inclusion statistics in Table 1, it can be clearly found that the number of inclusions in the quartz sand is significantly reduced after the high-voltage electric pulse enhanced roasting and water quenching treatment of the present invention. This shows that the use of the high-voltage electric pulse water quenching method can enhance the destruction of the surface and internal aggregated fluid inclusions of the quartz particles, open up a channel for subsequent acid leaching and impurity removal, and produce high-quality ultra-high purity quartz sand products.

[0054] It should be noted that the above embodiments all belong to the same inventive concept, and the description of each embodiment has its own focus. For any details not described in individual embodiments, reference may be made to the description in other embodiments.

[0055] The above-described embodiments merely illustrate the implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A method for removing gas-liquid inclusions in quartz sand, characterized in that: The following steps are involved: S1. Roasting the quartz ore; S2 S1 obtained after the roasting of quartz ore was water quenched and high-voltage electric pulse treatment; S3. Purify the quartz ore obtained in S2 to obtain high-purity quartz sand.

2. The method for removing gas-liquid inclusions in quartz sand according to claim 1, wherein: In step S1, the calcination temperature is 850-1000° C., and the calcination time is 10-30 min.

3. The method for removing gas-liquid inclusions in quartz sand according to claim 1, wherein in step S2, the conditions for the high-voltage electric pulse treatment include: The ball gap spacing is 15~35mm, the number of pulses is 100~300, and the input voltage is 60~100V.

4. The method for removing gas-liquid inclusions in quartz sand according to claim 1, wherein in step S3, the purification process comprises: The quartz ore obtained from S2 is sequentially subjected to crushing, screening, magnetic separation, scrubbing, flotation, drug removal, acid leaching and water washing.

5. A device for removing gas-liquid inclusions in quartz sand, used to perform the method for removing gas-liquid inclusions in quartz sand according to any one of claims 1 to 4, characterized in that: It includes a roasting furnace, a high-voltage electric pulse water quenching device and a purification device; the high-voltage electric pulse water quenching device includes an insulating base, an insulating cavity, a pulse power supply, a screen, a high-voltage electrode and a grounding electrode; The insulating cavity is connected to the insulating base and is used to contain water and quartz ore; The grounding electrode is installed in the insulating cavity and connected with the screen to form a crushing cavity; One end of the high-voltage electrode is installed at the inner bottom of the cavity, and the other end passes through the screen into the crushing cavity; The high-voltage end of the pulse power supply is connected to the high-voltage electrode through a wire, and the ground end thereof is connected to the ground electrode through a wire to form a loop; The discharge port of the roasting furnace is communicated with the crushing chamber, and the purification device is communicated with the insulating cavity.

6. The device for removing gas-liquid inclusions in quartz sand according to claim 5, characterized in that: It also includes a conveying device, which is installed at the inner bottom of the insulating cavity and is used to transport the quartz ore after water quenching and high-voltage electric pulse treatment out of the high-voltage electric pulse water quenching device.

7. The device for removing gas-liquid inclusions in quartz sand according to claim 5, characterized in that: The insulating cavity is provided with a water inlet device and a water outlet device for replacing the water medium in the cavity.

8. The device for removing gas-liquid inclusions in quartz sand according to claim 5, characterized in that: The insulating cavity is formed by splicing a first insulating shell and a second insulating shell, the second insulating shell is fixedly connected to the insulating base; the grounding electrode is fixedly connected to the first insulating shell.

9. The device for removing gas-liquid inclusions in quartz sand according to claim 8, characterized in that: It also includes a central conductor connected to the high-voltage end of the pulse power supply through a wire, and the end of the central conductor away from the pulse power supply passes through the insulating base and the second insulating shell in sequence to be connected to the high-voltage electrode.

10. The device for removing gas-liquid inclusions in quartz sand according to claim 5, characterized in that: The purification device comprises a crushing unit, a screening unit, a magnetic separation unit, a scrubbing unit, a flotation unit, a drug removal unit, an acid leaching unit and a water washing unit which are connected in sequence.

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