A natural quartz sand purification process and purification integrated equipment

Abstract

The application discloses a natural quartz sand purification integrated equipment, which comprises a vertical kiln and a floating washing pool, the feeding port of the vertical kiln is connected with the discharging port of a conveyor, the feeding hopper of the conveyor is arranged in a ground groove, the discharging port of the vertical kiln corresponds to the feeding hopper at the upper end of the floating washing pool, a dustproof chamber is arranged at the position of the floating washing pool, and the dustproof chamber is connected with a dust removal system arranged on the vertical kiln; and a natural quartz sand purification process, which comprises the steps of raw ore sorting, crushing and flotation; a ceramic cylinder cyclone hole is arranged, jetted flame is gathered, point heating is formed, and after local rapid heating, water quenching is carried out, local rapid cooling can rapidly split the stone, and the consumption of energy is reduced; a buffer hopper is arranged at the upper end of the net barrel to avoid excessive falling impact of the stone on the net barrel, and an interval is formed between the ceramic cylinder and the net barrel to avoid damage of the stone to the ceramic cylinder.

Description

Technical Field

[0001] This invention relates to technologies related to the purification of quartz sand, specifically to a natural quartz sand purification process and integrated purification equipment. Background Technology

[0002] Quartz sand is a non-metallic mineral, a hard, wear-resistant, and chemically stable silicate mineral, whose main mineral component is SiO2. It is widely used in glass, casting, ceramics and refractory materials, ferrosilicon smelting, metallurgical flux, metallurgy, construction, chemical, plastics, rubber, and abrasive industries. With the advancement of technology, the demand for high-purity quartz sand in high-tech fields such as aerospace, electronics, and IT is also increasing daily. High-purity quartz sand is obtained by purifying high-purity quartz ore. However, the resources of high-purity quartz ore are decreasing year by year. In order to meet the demand for high-purity quartz sand, the purification process of quartz sand is very important.

[0003] For example, in a method for purifying quartz sand (publication number: CN116692876A), the process of crushing, removing impurities from the surface of the ore, color sorting, pulverizing, roasting, water quenching, and magnetic separation is used. Among them, microwave roasting is carried out at a temperature of 850-900 degrees Celsius and a holding time of 4-5 hours. This process consumes a lot of energy and is not very efficient for raw stones containing a large number of metal elements. In addition, the internal parts are heated first, which can easily cause safety hazards.

[0004] For example, in the case of a natural quartz sand roasting furnace for oil fracturing (Announcement No.: CN209672843U), it is described that "quartz sand enters the furnace body of the roasting furnace through a bucket elevator, and then flows down layer by layer through an inclined plate. During the flow, the quartz sand is heated until it reaches the gas burner, where it is heated to 800-1000℃ by an open flame, and then discharged from the outlet." This method of direct combustion with an open flame is prone to causing one-sided heating and is relatively wasteful of energy. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing purification processes by providing an integrated equipment for purifying natural quartz sand.

[0006] This invention is achieved through the following technical solution.

[0007] An integrated equipment for purifying natural quartz sand includes a vertical kiln and a flotation tank. The feed inlet of the vertical kiln is connected to the discharge outlet of a conveyor, and the feed hopper of the conveyor is located in a groove in the ground. The discharge outlet of the vertical kiln corresponds to the position of the feed hopper at the upper end of the flotation tank. A dustproof chamber is set at the position of the flotation tank and is connected to a dust removal system installed on the vertical kiln. The vertical kiln includes an external wall, a fixed support beam in the middle, and a protective wall installed on the support beam. A water spray pipe is installed on the top of the wall, and an exhaust port connected to the dust removal system is opened on the opposite side of the wall corresponding to the water spray pipe. A buffer bucket is installed at the upper end of the protective wall through a damping spring, and the side of the buffer bucket is slidably connected to the wall through a support slider. A mesh bucket is fixed below the buffer bucket and installed inside the protective wall. A ceramic cylinder is fixed between the protective wall and the mesh bucket. The water spray pipe inside the ceramic cylinder is connected to the burner, and the rear end of the burner is connected to the gas pipeline. The gas pipeline is connected to the gas supply interface. The net bucket is connected to the support base via a telescopic rod at the bottom center. The side of the support base is hinged to the vibrating plate via a hinged seat. The vibrating plate is a V-shaped structure plate. One end of the vibrating plate contacts the outer sleeve of the telescopic rod, and the other end of the vibrating plate contacts the crushed stone plate. The two ends of the crushed stone plate are directly placed on the damping shock absorbers.

[0008] Furthermore, the flotation tank includes a ladder-shaped first impurity removal chamber, a second impurity removal chamber, and a third impurity removal chamber. The first impurity removal chamber forms a liquid collection tank through a filter screen, and a drain outlet is installed at the bottom of the liquid collection tank. A discharge door is sealed on the top plate of the second impurity removal chamber at the lower end of the filter screen. The discharge door is opened and closed by an electric push rod, and the end of the electric push rod is hinged to a push rod support plate, which is fixed to the top plate.

[0009] Furthermore, a second liquid inlet is provided on the outside of the unloading door installed on the top plate inside the second impurity removal chamber, and a liquid accumulation tank is provided at the bottom of the second impurity removal chamber. At the same time, an unloading door is installed on the top plate of the third impurity removal chamber, and a third liquid inlet is provided on the outside of the unloading door.

[0010] Furthermore, the top plate of the third impurity removal chamber is equipped with an electric push rod and a discharge door, and the lower end of the filter screen plate at the bottom of the third impurity removal chamber extends to the side wall of the third impurity removal chamber, and a discharge port is installed on the side wall of the third impurity removal chamber.

[0011] Furthermore, a telescopic rod passes through the U-shaped groove on the vibrating plate, and a limit rod is provided at one end of the vibrating plate that contacts the crushed stone plate. A telescopic rod passes through the middle of the crushed stone plate, and a gap is provided between the hole in the crushed stone plate and the telescopic rod. The tilt angle of the crushed stone plate is adapted to a range of 10°–15°.

[0012] Furthermore, the bottom of the support beam is provided with an inclined guide plate, and the bottom of the guide plate is provided with a water trough. A drain pipe is connected to the side of the water trough. Meanwhile, an inspection port is opened on the other side of the wall corresponding to the water trough, and the position below the support beam in the middle of the vertical kiln is located underground.

[0013] Furthermore, the outer side of the ceramic cylinder is fixed to the inner wall of the protective wall, and an annular gas pipe is fixed on the outer wall of the protective wall. At the same time, the outer wall of the ceramic cylinder and the mesh barrel are spaced more than 3cm apart. The ceramic cylinder is evenly provided with spirally arranged swirling holes, and the swirling holes are through holes with a larger outer opening and a smaller inner opening. At the same time, a burner is installed at the rear end of each group of swirling holes.

[0014] A natural quartz sand purification process includes the steps of raw ore sorting, crushing, and flotation. Raw ore sorting: The raw silica is washed with water and crushed and sorted by hand or machine. After that, the cleaned raw ore is fed into the vertical kiln through the feed hopper under the conveyor. Crushing: The stone is fed into a mesh bucket inside the buffer hopper, where a burner sprays fire to calcine it, creating cracks. Then, a water supply system sprays water through a spray pipe to accelerate the crushing process. A secondary calcination process can be used, where the unheated parts of the stone are reheated, further accelerating the crushing. The crushed stone falls through the gaps in the mesh bucket onto an inclined crushing slab. The feed inlet at the bottom of the crushing slab then opens, and the stone enters the flotation tank. Flotation: The material output from the flotation tank enters the first impurity removal chamber through the feed hopper. Hydrofluoric acid is used to adjust the slurry to a pH value lower than that of the conveyor. 200g / t each of octadecylamine and sodium petroleum sulfonate are injected into the first impurity removal chamber through the first liquid inlet for flotation for eight minutes. After that, the liquid outlet on the rear side of the first impurity removal chamber is connected to the recovery pipeline for waste recovery. Then, the electric push rod opens the discharge gate to allow the stone material in the first impurity removal chamber to enter the second impurity removal chamber. 200g / t each of octadecylamine and sodium petroleum sulfonate are injected into the second impurity removal chamber through the second liquid inlet for flotation for five minutes. After emptying, the stone material enters the third impurity removal chamber for flotation. 200g / t each of octadecylamine and sodium petroleum sulfonate are injected through the third liquid inlet for flotation for three minutes. After that, the liquid is discharged. The stone material is then deionized and washed. After drying, cooling, and bagging, the stone material is fed into the outlet.

[0015] Preferably, the heat generated inside the vertical kiln during the crushing process can be transported to the outside of the flotation tank through a pipeline and added to the inside of the flotation tank, and the temperature range inside the flotation tank is 40-50°.

[0016] Preferably, the interval between the sequential addition of hydrofluoric acid, octadecylamine, and sodium petroleum sulfonate in the flotation step is three minutes.

[0017] As can be seen from the above technical solutions, the beneficial effects of the present invention are: This invention provides an integrated equipment for purifying natural quartz sand: 1. Using a ceramic cylinder with swirling holes, the jet flame is concentrated to form a point heating method, similar to flame cutting. After localized rapid heating, water quenching and localized rapid cooling will quickly split the stone and reduce energy consumption. 2. A telescopic rod is installed at the bottom of the mesh drum. The internal weight change drives the movement of the vibrating plate to lift the crushed stone plate, which makes the crushed stone plate shake, making it easier for the material to slide downward and avoid accumulation. 3. A buffer hopper is installed at the top of the mesh drum to prevent the excessive impact of falling stones from damaging the mesh drum. At the same time, a gap is formed between the ceramic drum and the mesh drum to prevent stones from impacting the ceramic drum and causing damage. Attached Figure Description

[0018] Figure 1 This is a front view of the invention structure; Figure 2 A schematic diagram of the internal structure of the vertical kiln used in the invention. Figure 3 A schematic diagram of the structure of the inventive flotation tank; Figure 4 A schematic diagram of the invention's structural vibration plate; Figure 5 This is a schematic diagram of the ceramic cylinder structure for the invention.

[0019] Numbered in the diagram: 1. Vertical kiln; 101. Wall; 102. Water spray pipe; 103. Support slider; 104. Gas pipe; 105. Protective wall; 106. Telescopic rod; 107. Support base; 108. Baffle plate; 109. Buffer hopper; 110. Mesh tank; 111. Ceramic cylinder; 112. Burner; 113. Gas supply interface; 114. Crushed stone slab; 115. Damping shock absorber; 116. Vibrating plate; 117. Support beam; 118. Hinge seat; 11 9. U-shaped trough; 120. Swirl hole; 2. Conveyor; 3. Dustproof chamber; 4. Floating washing tank; 401. Feed hopper; 402. First liquid inlet; 403. First impurity removal chamber; 404. Discharge gate; 405. Second liquid inlet; 406. Electric push rod; 407. Second impurity removal chamber; 408. Third liquid inlet; 409. Push rod support plate; 410. Discharge port; 411. Third impurity removal chamber; 412. Liquid collection tank; 413. Drainage port; 414. Filter screen. Detailed Implementation

[0020] The following examples are used to illustrate the present invention, but should not be construed as limiting the scope of the invention. The implementation conditions used in the examples may be further adjusted according to the manufacturer's specifications, and the implementation conditions not specified are generally conventional experimental conditions. Example 1:

[0021] like Figure 1As shown in Figure 5: An integrated equipment for purifying natural quartz sand includes a vertical kiln 1 and a flotation tank 4, as well as an external dust removal system, a water supply system, and a waste liquid recycling device. The feed inlet of the vertical kiln 1 is connected to the discharge outlet of the conveyor 2, and the feed hopper of the conveyor 2 is in a ground groove to facilitate the transportation of stone by vehicles and other tools. The discharge outlet of the vertical kiln 1 corresponds to the position of the feed hopper 401 at the upper end of the flotation tank 4, and can also be transported by a small conveyor belt. The material can be added into the flotation tank 4 after passing through a guide plate. A dustproof chamber 3 is set at the position of the flotation tank 4, and the dustproof chamber 3 is connected to the dust removal system installed on the vertical kiln 1. The dust removal system is also connected to the exhaust port at the top of the vertical kiln 1. The dust removal system includes a heat exchanger for waste heat recovery and an air purification device. The vertical kiln 1 includes an external wall 101, a centrally fixed support beam 117, and a protective wall 105 mounted on the support beam 117. A water spray pipe 102 is installed at the top of the wall 101, and multiple spray nozzles are mounted on the water spray pipe 102. The water spray pipe 102 is connected to an external water supply system. The water spray pipe 102 can be configured as a folding and telescopic structure to prevent the water inside the pipe from overheating. An exhaust port for connecting to a dust removal system is opened on the opposite side of the wall 101 corresponding to the water spray pipe 102. A buffer bucket 109 is installed at the upper end of the protective wall 105 via a damping spring. When the mesh bucket 110 is impacted, the force will not directly act on the protective wall 105, thus providing a buffering effect. The buffer bucket 109 is positioned such that it cannot be directly fixed, as fixing would not provide a buffering effect. Therefore, a sliding connection is used, and the side of the buffer bucket 109 is slidably connected to the wall 101 via a support slider 103 to ensure that the buffer bucket 109 will not tilt or be damaged. A mesh bucket 110 fixed below the buffer bucket 109 is installed inside the protective wall 105, and a ceramic cylinder 111 is fixed between the protective wall 105 and the mesh bucket 110. A water spray pipe 102 inside the ceramic cylinder 111 is connected to a burner 112, and the rear end of the burner 112 is connected to a gas pipe 104, which is connected to a gas supply interface 113. The gas supply interface 113 is connected to an external gas supply device. The net bucket 110 is connected to the support base 107 via a telescopic rod at the bottom center. This serves two purposes: first, to provide support and prevent deformation of the bottom of the net bucket 110; and second, to push the stone slab 116. The support base 107 has a hinged hinge 118 on its side, which is connected to the vibrating plate 116. The vibrating plate 116 is a V-shaped structure plate. One end of the vibrating plate 116 contacts the outer sleeve of the telescopic rod 106. The outer sleeve of the telescopic rod moves synchronously with the net bucket 110. A pressure plate can be welded to the outside of the outer sleeve of the telescopic rod 106 to press down one end of the vibrating plate 116, increasing the torque and making it easier to push the stone slab 114. The other end of the vibrating plate 116 contacts the stone slab 114. Both ends of the stone slab 114 are directly placed on damping shock absorbers 115. The connection between the damping shock absorbers 115 and the stone slab 114 cannot be fixed.

[0022] The flotation tank 4 includes a ladder-shaped first impurity removal chamber 403, a second impurity removal chamber 407, and a third impurity removal chamber 411. After a roughing and cleaning flotation process, the first impurity removal chamber 403 forms a liquid collection tank 412 through a filter screen plate 414 to facilitate solid-liquid separation. A drain port 413 is installed at the bottom of the liquid collection tank 412, and a control valve is installed on each drain port 413. A discharge door 404 is sealed on the top plate of the second impurity removal chamber 407 at the lower end of the filter screen plate 414. The discharge door 404 is opened and closed by an electric push rod 406. The end of the electric push rod 406 is hinged to a push rod support plate 409, and the push rod support plate 409 is fixed to the top plate. At the same time, an agitator can be installed on the top of the three impurity removal chambers 403, 407, and 411. The agitator is made of corrosion-resistant material.

[0023] The unloading door 404 installed on the top plate of the second impurity removal chamber 407 has a second liquid inlet 405 on the outside, and a liquid accumulation tank 412 is provided at the bottom of the second impurity removal chamber 407. At the same time, the unloading door 404 is installed on the top plate of the third impurity removal chamber 411, and a third liquid inlet 408 is provided on the outside of the unloading door 404. The material can enter the working process by its own weight. At the same time, a small vibrating motor can be installed on the outside of the flotation tank 4 to avoid the problem of the stone not falling off.

[0024] The top plate of the third impurity removal chamber 411 is equipped with an electric push rod 406 and a discharge door 404, and the lower end of the filter screen plate 414 at the bottom of the third impurity removal chamber 411 extends to the side wall of the third impurity removal chamber 411, and a discharge port 410 is installed on the side wall of the third impurity removal chamber 411.

[0025] The U-shaped groove 119 on the vibrating plate 116 has a telescopic rod 106 passing through it. The movement of the vibrating plate 116 will not affect the normal extension and retraction of the telescopic rod 106. A limit rod is provided at the end of the vibrating plate 116 that contacts the crushed stone plate 114. The telescopic rod 106 passes through the middle of the crushed stone plate 114. A gap is provided between the hole in the crushed stone plate 114 and the telescopic rod 106 to avoid the crushed stone plate 114 getting stuck and unable to adjust the angle or shaking. The tilt angle of the crushed stone plate 114 is adapted to a range of 10° to 15°.

[0026] An inclined guide plate 108 is provided at the bottom of the support beam 117, and a water trough is provided at the bottom of the guide plate 108. A drain pipe is connected to the side of the water trough, and the drainage can be treated and reused to save water resources. Meanwhile, an inspection port is provided on the other side of the wall 101 corresponding to the water trough, and the position below the support beam 117 in the middle of the vertical kiln 1 is located underground.

[0027] The ceramic cylinder 111 is fixed to the inner wall of the protective wall 105 on the outside, and a ring-shaped gas pipe 104 is fixed to the outer wall of the protective wall 105. At the same time, the outer walls of the ceramic cylinder 111 and the mesh barrel 110 are spaced more than 3cm apart. The ceramic cylinder 111 is evenly provided with spirally arranged swirl holes 120, and the swirl holes 120 are through holes with a larger outer opening and a smaller inner opening, which forms a flame-gathering effect, resulting in a higher output flame temperature. At the same time, a burner 112 is installed at the rear end of each set of swirl holes 120.

[0028] The raw ore, after preliminary crushing and screening, is conveyed by conveyor 2 to the buffer hopper 109 inside the vertical kiln 1, and then enters the mesh drum 110. Gas is then supplied by the gas supply equipment connected to the gas supply interface 113, and combustion occurs in the burner 112. Simultaneously, the flame converges through the swirl holes 120, rapidly heating a small area of ​​the stone. This allows the stone to heat up quickly in a localized area, causing it to crack upon contact with cold water. Compared to microwave roasting, external heating avoids the explosion problem and, compared to large-scale burning, transforms surface combustion into point combustion. The point-to-point cracking leads to surface cracking. As the temperature rises, the expansion coefficients of impurities and quartz particles differ, resulting in cracks. Solid inclusions within the crystals also crack due to their different expansion coefficients from the quartz matrix. The cracked stone exhibits a layer-by-layer detachment effect from the outside in, even without water. After rapid cooling in water, the material is conveyed out through the crushing plate 114. The material automatically slides down the crushing plate 114, with some fine particles accumulating on it. On 114, the reduction of material inside the mesh barrel 110 will cause the telescopic rod 106 to move, which in turn will cause the vibrating plate 116 below to fall, thus changing the force at both ends of the crushed stone plate 114, resulting in sliding, similar to the seesaw principle. This will cause the material to slide downwards, while the water from the water extraction will collect in the water tank along the backflow plate 108, and be reused after treatment. The output material can be fed into the feed hopper 401 through the conveyor belt, and a magnetic separator can be installed on the conveyor belt, so that the material enters the first impurity removal chamber 403. Then, reagents are added through the first liquid inlet 402 for acid washing and flotation. After that, the liquid is discharged by opening the control valve on the drain port 413. Ionized water can be injected through the first liquid inlet 402 for rinsing, and the liquid can be recycled. Then, the discharge door 404 at the bottom of the first impurity removal chamber 403 is opened, and the material enters the second impurity removal chamber 407 for secondary treatment. Similarly, it enters the third impurity removal chamber 411 and is then discharged from the flotation tank 4 for drying. The drying can be carried out using the waste heat of the vertical kiln 1. Example 2:

[0029] Based on Example 1: A natural quartz sand purification process, the steps of which include raw ore sorting, crushing, and flotation; Raw ore sorting: The raw silica is washed with water and crushed and sorted manually or by machine. After that, the cleaned raw ore is fed into the vertical kiln 1 through the feed hopper below the conveyor 2. Crushing: The stone is conveyed to the mesh bucket 110 inside the buffer hopper 109, and then the burner 112 sprays fire to calcine the stone, producing cracks. Then, the water supply system sprays water through the water spray pipe 102 to accelerate the crushing process. Secondary calcination can be used, where the unheated parts of the stone are reheated, accelerating the crushing. The crushed stone falls through the gaps in the mesh bucket 110 onto the inclined crushing plate 114. Then, the feed port at the lower end of the crushing plate 114 opens, and the stone enters the flotation tank 4. Before entering the flotation tank 4, the stone can be manually sorted to remove impurities and then sent to the crusher for crushing and screening. The quartz sand that passes through the screen is then sent to the magnetic separator. After magnetic separation, the quartz sand is put into the flotation tank 4. Some quartz sand ore can be directly conveyed to the flotation tank 4 without magnetic separation, which can be adjusted according to the ore condition.

[0030] The calcination of quartz stone causes drastic changes inside, with the crystal volume expanding significantly, which further exposes impurities within the crystal. When the calcined silica is quenched in cooling water, the quartz particles become more loose and break apart along with the impurities and the quartz matrix, which is beneficial for the exposure and breakage of the impurities.

[0031] Flotation: The material output from flotation tank 4 enters the first impurity removal chamber 403 through feed hopper 401. Hydrofluoric acid is used to adjust the pH value to less than that of conveyor 2. Octadecylamine and sodium petroleum sulfonate, 200g / t each, are sequentially injected into the first impurity removal chamber 403 through the first liquid inlet 402 for flotation for eight minutes. Afterwards, the drain port 413 on the rear side of the first impurity removal chamber 403 is connected to a recovery pipe for waste recovery. Then, the electric push rod 406 opens the discharge gate 404 to discharge the first impurity removal chamber. After the stone material inside 403 enters the second impurity removal chamber 407, 200g / t each of octadecylamine and sodium petroleum sulfonate are injected into the second impurity removal chamber 407 through the second liquid inlet 405 for flotation for five minutes, and then the chamber is emptied. After that, the stone material enters the third impurity removal chamber 411 for further processing. 200g / t each of octadecylamine and sodium petroleum sulfonate are injected through the third liquid inlet 408 for flotation for three minutes, and then the liquid is discharged. After that, the stone material is washed by deionization, and after the stone material is dried by opening the discharge port 410, it is cooled and bagged.

[0032] This process is mainly for removing metal oxides and some silicate minerals that are soluble in acid; The heat generated inside the vertical kiln 1 during the crushing process can be transported to the outside of the flotation tank 4 through pipelines and added to the inside of the flotation tank 4. The temperature range inside the flotation tank 4 is 40-50°.

[0033] In the flotation step, hydrofluoric acid, octadecylamine, and sodium petroleum sulfonate are added sequentially with an interval of three minutes. A longer soaking time makes it easier to remove impurities, but this is not suitable for the needs of large-scale production. Therefore, a short-time, multiple-flotation method is used to meet the requirements.

Claims

1. An integrated equipment for purifying natural quartz sand, characterized in that: It includes a vertical kiln (1) and a flotation tank (4). The feed inlet of the vertical kiln (1) is connected to the discharge outlet of the conveyor (2), and the feed hopper of the conveyor (2) is in a groove in the ground. The discharge of the vertical kiln (1) corresponds to the position of the feed hopper (401) at the upper end of the flotation tank (4). A dustproof chamber (3) is set at the position of the flotation tank (4), and the dustproof chamber (3) is connected to the dust removal system installed on the vertical kiln (1). The vertical kiln (1) includes an external wall (101), a centrally fixed support beam (117), and a protective wall (105) mounted on the support beam (117). A water spray pipe (102) is installed on the top of the wall (101), and an exhaust port for connecting to a dust removal system is opened on the opposite side of the wall (101) corresponding to the water spray pipe (102). A buffer bucket (109) is mounted on the upper end of the protective wall (105) via a damping spring, and a support slider (105) is mounted on the side of the buffer bucket (109). 03) The mesh bucket (110) is slidably connected to the wall (101) and fixed below the buffer bucket (109) is installed inside the protective wall (105). A ceramic cylinder (111) is fixed between the protective wall (105) and the mesh bucket (110). The water spray pipe (102) inside the ceramic cylinder (111) is connected to the burner (112). The rear end of the burner (112) is connected to the gas pipe (104). The gas pipe (104) is connected to the gas supply interface (113). The net bucket (110) is connected to the support base (107) by a telescopic rod at the bottom center, and the side of the support base (107) is hinged to the vibrating plate (116) by a hinge seat (118). The vibrating plate (116) is a V-shaped structure plate. One end of the vibrating plate (116) is in contact with the outer sleeve of the telescopic rod (106), and the other end of the vibrating plate (116) is in contact with the crushed stone plate (114). The two ends of the crushed stone plate (114) are directly placed on the damping shock absorbers (115). The flotation tank (4) includes a ladder-shaped first impurity removal chamber (403), a second impurity removal chamber (407), and a third impurity removal chamber (411). The first impurity removal chamber (403) forms a liquid collection tank (412) at intervals through a filter screen plate (414). A drain port (413) is installed at the bottom of the liquid collection tank (412). A discharge door (404) is sealed on the top plate of the second impurity removal chamber (407) at the lower end of the filter screen plate (414). The discharge door (404) is opened and closed by an electric push rod (406). The end of the electric push rod (406) is hinged to a push rod support plate (409), and the push rod support plate (409) is fixed on the top plate.

2. The integrated equipment for purifying natural quartz sand according to claim 1, characterized in that: The unloading door (404) installed on the top plate inside the second impurity removal chamber (407) is provided with a second liquid inlet (405) on the outside, and a liquid accumulation tank (412) is provided at the bottom of the second impurity removal chamber (407). At the same time, the unloading door (404) is installed on the top plate of the third impurity removal chamber (411), and a third liquid inlet (408) is provided on the outside of the unloading door (404).

3. The integrated equipment for purifying natural quartz sand according to claim 2, characterized in that: The top plate of the third impurity removal chamber (411) is provided with an electric push rod (406) and a discharge door (404), and the lower end of the filter screen plate (414) at the bottom of the third impurity removal chamber (411) extends to the side wall of the third impurity removal chamber (411), and a discharge port (410) is installed on the side wall of the third impurity removal chamber (411).

4. The integrated equipment for purifying natural quartz sand according to claim 3, characterized in that: The U-shaped groove (119) on the vibrating plate (116) has a telescopic rod (106) passing through it. A limit rod is provided at one end of the vibrating plate (116) that contacts the crushed stone plate (114). A telescopic rod (106) is inserted through the middle of the crushed stone plate (114). A gap is provided between the hole in the crushed stone plate (114) and the telescopic rod (106). The tilt angle of the crushed stone plate (114) is within the range of 10° to 15°.

5. The integrated equipment for purifying natural quartz sand according to claim 4, characterized in that: The bottom of the support beam (117) is provided with an inclined guide plate (108), and the bottom of the guide plate (108) is provided with a water tank, and the side of the water tank is connected with a drain pipe. Meanwhile, the other side of the wall (101) corresponding to the water tank is provided with an inspection port, and the position below the support beam (117) in the middle of the vertical kiln (1) is located underground.

6. The integrated equipment for purifying natural quartz sand according to claim 5, characterized in that: The ceramic cylinder (111) is fixed to the inner wall of the protective wall (105) on the outside, and a ring-shaped gas pipe (104) is fixed on the outer wall of the protective wall (105). At the same time, the outer walls of the ceramic cylinder (111) and the mesh barrel (110) are spaced more than 3cm apart. The ceramic cylinder (111) is evenly provided with spirally arranged swirling holes (120), and the swirling holes (120) are through holes with a large outer opening and a small inner opening. At the same time, a burner (112) is installed at the rear end of each group of swirling holes (120).

7. A natural quartz sand purification process for an integrated natural quartz sand purification device according to claim 5, characterized in that: The steps include raw ore sorting, crushing, and flotation; Raw ore sorting: The raw silica is washed with water and crushed and sorted by hand or machine. Then the cleaned raw ore is fed into the vertical kiln (1) through the feed hopper below the conveyor (2). Crushing: The stone is fed into the mesh bucket (110) inside the buffer bucket (109), and then the burner (112) sprays fire to calcine the stone, producing cracks. Then the water supply system sprays water through the water spray pipe (102) to accelerate the degree of crushing. Secondary calcination can be used to reheat the unheated part inside the stone, accelerating the crushing. The crushed stone falls through the gap of the mesh bucket (110) onto the inclined crushing plate (114). Then the material port at the bottom of the crushing plate (114) is opened, and the stone enters the flotation tank (4). Flotation: The material output from the flotation tank (4) enters the first impurity removal chamber (403) through the feed hopper (401). Hydrofluoric acid is used to adjust the slurry to a pH value lower than that of the conveyor (2). 200g / t each of octadecylamine and sodium petroleum sulfonate are injected into the first impurity removal chamber (403) through the first liquid inlet (402) for flotation for eight minutes. Then, the drain outlet (413) on the rear side of the first impurity removal chamber (403) is connected to the recovery pipe for waste recycling. After that, the electric push rod (406) opens the discharge gate (404) to discharge the first impurity. After the stone material inside the first impurity removal chamber (403) enters the second impurity removal chamber (407), 200g / t of octadecylamine and sodium petroleum sulfonate are injected into the second impurity removal chamber (407) through the second liquid inlet (405) for flotation for five minutes, and then the air is discharged. After that, the stone material enters the third impurity removal chamber (411) for flotation. 200g / t of octadecylamine and sodium petroleum sulfonate are injected through the third liquid inlet (408) for flotation for three minutes, and then the liquid is discharged. After that, the stone material is washed by deionization, and then the stone material is fed in through the opening of the discharge port (410) for drying, cooling and bagging.

8. The natural quartz sand purification process according to claim 7, characterized in that: The heat generated inside the vertical kiln (1) during the crushing process can be transported to the outside of the flotation tank (4) through a pipeline and added to the inside of the flotation tank (4). The temperature range inside the flotation tank (4) is 40-50°.

9. The natural quartz sand purification process according to claim 8, characterized in that: The hydrofluoric acid, octadecylamine, and sodium petroleum sulfonate were added sequentially in the flotation step at intervals of three minutes.

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