A quartz sand pickling circulation purification process and purification system

Abstract

The invention discloses a quartz sand pickling circulation purification process and a purification system, and relates to the technical field of quartz sand purification. The invention comprises ore dressing and washing, crushing and pulverizing, and pickling and recycling; a pulverizing device comprises a shell, a feed bin, and a conveying mechanism, and a first baffle and a second baffle are controlled by changes in the weight of a pulverizing cylinder; quartz sand and acid solution are heated, and after heating, the quartz sand and the acid solution are continuously mixed to form an acid-containing material at a certain temperature, and then stirred for reaction precipitation, the acid solution is discharged, and ultrapure water is added for stirring and washing, so as to effectively remove iron oxides such as film iron, other oxides and acid-capable impurities in the quartz sand; the pulverizing cylinder is moved downward by gravity, and then a pull rope is used to balance the feeding speed of the feed bin to prevent congestion in the pulverizing cylinder; the pulverizing cylinder can be restored after being moved downward by a spring, and the discharge speed of quartz sand particles in the pulverizing cylinder can be accelerated by the spring, and the efficiency of quartz sand pulverization is increased at the same time.

Description

Technical Field

[0001] This invention relates to the field of quartz sand purification technology, specifically to a quartz sand acid washing and circulating purification process and purification system. Background Technology

[0002] Quartz sand is a non-metallic mineral, a hard, wear-resistant, and chemically stable silicate mineral. Its main mineral component is SiO2. Quartz sand is milky white or colorless and translucent, with a hardness of 7. It is an important industrial mineral raw material, a non-hazardous chemical, and widely used in glass, casting, ceramics and refractory materials, ferrosilicon smelting, metallurgical flux, metallurgy, construction, chemicals, plastics, rubber, abrasives, and other industries. Quartz sand is a major raw material for glass, both because it has the highest silica content among glass raw materials and because it plays a significant role in the production of colorless glass. Therefore, the purity of quartz sand (i.e., the absence of contaminating impurities) is of particular importance. High-grade glass sand has a very high silica content, reaching 98.5-99.8%.

[0003] High-purity quartz sand is the sole raw material for producing high-quality quartz glass used in high-tech fields such as fiber optic communication, electronics, semiconductors, solar energy, lasers, and aerospace. Currently, the internationally recognized standard for elemental impurities in high-purity quartz sand is based on the high-purity quartz sand produced by UNIMIN Corporation in the United States. Its IOTA-CG grade is the lowest end product, with a total metallic element impurity content of 22 ppm ± 22 grams. This means that the content of impurity elements in one ton of quartz sand must be less than 22 grams to meet the high-purity quartz sand standard. High-purity quartz sand is produced by crushing naturally occurring quartz ore.

[0004] Quartz sand contains iron impurities, which must be removed to obtain high-purity quartz sand. Current technologies for preparing high-purity quartz sand often employ magnetic separation to remove iron impurities. However, this process can only remove magnetic minerals, including intergrowth particles such as hematite, limonite, biotite, ilmenite, and pyrite. It is not ideal for removing thin films of iron or impregnated iron from the surface of quartz sand particles. Summary of the Invention

[0005] The purpose of this invention is to provide a quartz sand acid washing and circulating purification process and system to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cyclic purification process for acid washing of quartz sand, comprising the following steps;

[0007] Step 1: Mineral processing and washing. The quartz ore is sorted and divided. The selected quartz ore is placed in a grid box, then soaked in clean water in a washing tank, rinsed with high-pressure water, and then drained and dried.

[0008] Step 2: Crushing and pulverizing. The quartz ore obtained in Step 1 is calcined and then crushed into quartz blocks with a particle size of 8-10mm by a jaw crusher. The blocks are then fed into a pulverizing device and pulverized into quartz sand particles of 60-120 mesh.

[0009] Step 3: Acid washing and recovery. The 60-120 mesh quartz sand particles obtained in Step 2 are put into an acid washing reactor containing hydrochloric acid aqueous solution with a concentration of 5-8%. The hydrochloric acid aqueous solution is heated to 75-85℃ and stirred for 20-30 minutes. After precipitation, the hydrochloric acid aqueous solution is discharged. Ultrapure water is added, and the quartz sand particles are washed by stirring to remove acid. The hydrochloric acid solution is then recovered.

[0010] Step 4: Send the acid-washed quartz sand particles from Step 3 into an oven set at 180℃ and dry for 3 hours. After the oven is closed and cooled, remove the quartz sand particles. The acid washing and purification of quartz sand is now complete.

[0011] A quartz sand acid washing and circulation purification system is provided for crushing quartz blocks in step two above. The crushing device includes a shell, a feeding bin, and a conveying mechanism. The feeding bin is fixedly mounted on the conveying mechanism. A crushing cylinder is rotatably mounted inside the shell. Several crushing balls for crushing quartz sand are placed inside the crushing cylinder. Fixed rings are rotatably mounted at both ends of the crushing cylinder, and both fixed rings are slidably connected to the inner wall of the shell. A first baffle and a second baffle are slidably mounted on the feeding bin to control the feeding speed. Toothed rings that control the movement of the first baffle and the second baffle are rotatably mounted on both sides of the feeding bin. A pull rope is provided between each toothed ring and the crushing cylinder. The crushing cylinder controls the rotation of the toothed rings by gravity and the pull ropes.

[0012] Preferably, a connecting ring is fixedly provided on one of the fixed rings, the pull rope passes through the connecting ring, and a winding drum is fixedly provided on each of the toothed rings, with the two ends of the pull rope respectively wound around the outer circumference of the two winding drums.

[0013] Preferably, a torsion spring is fixedly installed between the inner wall of each winding drum and the feed bin.

[0014] Preferably, the first baffle is fixedly provided with a first toothed plate that meshes with the toothed ring on both sides, and the second baffle is fixedly provided with a second toothed plate that meshes with the toothed ring on both sides.

[0015] Preferably, the conveying mechanism includes a conveying cylinder fixedly installed on the outside of the housing, a spiral feed roller rotatably installed inside the conveying cylinder, and two second telescopic rods fixedly installed at the end of the spiral feed roller near the crushing cylinder, with the end of each second telescopic rod away from the spiral feed roller fixedly connected to the inner wall of the crushing cylinder.

[0016] Preferably, a fixing rod is fixedly installed on the top of the conveying cylinder, a sliding rod is slidably installed on the fixing rod, and an anti-blocking plate is fixedly installed at the end of the sliding rod near the feed hopper.

[0017] Preferably, an abutment ball is fixedly provided at the end of the slide bar away from the feed bin.

[0018] Preferably, each of the fixed rings is provided with a fixed plate at its bottom, and each fixed plate is fixedly provided with a first telescopic rod corresponding to each fixed ring. Each first telescopic rod is fitted with a spring, and each fixed plate is fixedly connected to the inner wall of the housing.

[0019] Preferably, a feeding funnel is fixedly provided at the bottom of the shell.

[0020] In the above technical solution, the present invention provides a quartz sand acid washing and circulating purification process and purification system, which has the following beneficial effects: 1. The quartz sand and acid solution are heated, and the heated quartz sand and acid solution are continuously mixed to form an acid-containing material at a certain temperature. Then, the mixture is stirred to react and precipitate, the acid solution is discharged, and ultrapure water is added for stirring and washing, thereby effectively removing iron oxides such as thin film iron and impurities such as dyed iron, other oxides and acid-soluble impurities from the quartz sand; 2. The crushing cylinder is lowered by gravity, and the feeding speed of the feed hopper is balanced by the pull rope to prevent congestion in the crushing cylinder; 3. The crushing cylinder can be restored after being lowered by a spring, thereby balancing the feeding speed of the feed hopper. The spring can also accelerate the discharge speed of quartz sand particles in the crushing cylinder, and at the same time increase the crushing efficiency of quartz sand. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the pull rope provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the pulverizing cylinder provided in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the second telescopic rod provided in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the first barrier provided in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the spiral feed roller provided in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the contact ball provided in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the torsion spring provided in an embodiment of the present invention;

[0030] Figure 9 Provided for embodiments of the present invention Figure 1 Enlarged view of the structure at point A in the middle;

[0031] Figure 10 Provided for embodiments of the present invention Figure 6 Enlarged view of the structure at point B.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Shell; 101. Rope passage hole; 102. Slide groove; 2. Conveying cylinder; 201. Feed hole; 3. Feed bin; 4. Discharge funnel; 5. Drive motor; 11. Crushing cylinder; 12. Protruding rod; 13. Fixing ring; 131. Sliding block; 14. Fixing plate; 15. First telescopic rod; 16. Spring; 17. Crushing ball; 21. Spiral feed roller; 22. Second telescopic rod; 23. Fixing rod; 24. Abutment ball; 25. Sliding rod; 26. Anti-blocking plate; 31. First baffle plate; 32. Second baffle plate; 33. First toothed plate; 34. Second toothed plate; 35. Toothed ring; 36. Winding drum; 37. Pull rope; 371. Rope guide frame; 372. Connecting ring; 38. Torsion spring; 39. Rotating rod. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] Please see Figure 1-10 A cyclic purification process for acid washing of quartz sand includes the following steps;

[0036] Step 1: Mineral processing and washing. The quartz ore is sorted and sorted. The selected ore is placed in a grid box, then soaked in clean water in a washing tank and rinsed with high-pressure water until there are no obvious impurities visible to the naked eye on the surface. Then it is filtered and dried.

[0037] Step 2: Crushing and pulverizing. The quartz ore obtained in Step 1 is calcined and then crushed into quartz blocks with a particle size of 8-10mm by a jaw crusher. The blocks are then fed into a pulverizing device and pulverized into quartz sand with a mesh size of 60-120.

[0038] Step 3: Acid washing and recovery. The 60-120 mesh quartz sand particles obtained in Step 2 are put into an acid washing reactor containing hydrochloric acid aqueous solution with a concentration of 5-8%. The hydrochloric acid solution is heated to 75-85℃ and stirred for 20-30 minutes. After precipitation, the acid solution is discharged. Ultrapure water is added, and the quartz sand particles are washed by stirring to remove acid. The hydrochloric acid solution is then recovered.

[0039] Step 4: The acid-washed quartz sand particles from Step 3 are placed in an oven set at 180℃ and dried for 3 hours. After the oven is closed and cooled, the quartz sand particles are removed, and the acid washing of the quartz sand is completed. The sorted ore is cleaned, dried, calcined, and then crushed into 8-10mm particles. The 8-10mm quartz rock particles are fed into a crushing device and crushed into 60-120 mesh quartz sand particles. The crushed quartz sand particles are then fed into a reaction vessel for acid washing. The mixed hydrochloric acid solution and quartz sand particles are stirred for 20-30 minutes. After stirring is stopped and the quartz sand settles, the acid solution is discharged from the reaction vessel. Then, ultrapure water is added and stirred to remove the residual hydrochloric acid solution on the surface of the quartz sand particles, thus achieving deacidification. The hydrochloric acid discharged and detached from the surface of the quartz sand is recovered. The used hydrochloric acid is separated using membrane separation technology for reuse. The ultrapure water can be used as the raw water for repeated use. The deacidified quartz sand particles are dried to obtain purified quartz sand particles.

[0040] A quartz sand acid washing and circulating purification system is used to crush quartz blocks in step two of the aforementioned quartz sand acid washing and circulating purification process. The crushing device includes a shell 1, a feed bin 3, and a conveying mechanism. The feed bin 3 is fixedly mounted on the conveying mechanism. A crushing cylinder 11 is rotatably mounted inside the shell 1, and several crushing balls 17 for crushing quartz sand are placed inside the crushing cylinder 11. Fixed rings 13 are rotatably mounted at both ends of the crushing cylinder 11, and both fixed rings 13 are slidably connected to the inner wall of the shell 1. A control ring is slidably mounted on the feed bin 3. The feeding speed is controlled by a first baffle 31 and a second baffle 32. Gear rings 35 are rotatably mounted on both sides of the feeding chamber 3 to control the movement of the first baffle 31 and the second baffle 32. Each gear ring 35 is connected to a pull rope 37 between itself and the crushing cylinder 11. The crushing cylinder 11 controls the rotation of the gear rings 35 by gravity and the pull ropes 37. Each fixed ring 13 is fixedly mounted with a slider 131. Slide grooves 102 adapted to the sliders 131 are opened on both sides of the housing 1. Each fixed ring 13 is secured to the housing by the cooperation of the sliders 131 and the slide grooves 102. The feed hopper 3 slides up and down inside the crushing cylinder 11, which is used to hold small pieces of quartz sand to be crushed. The feed hopper 3 is fixedly mounted on the conveying mechanism. The crushing cylinder 11 rotates between two fixed rings 13. The quartz blocks in the feed hopper 3 fall into the conveying mechanism and are transported to the crushing cylinder 11. When the quartz blocks enter the crushing cylinder 11, the crushing cylinder 11 rotates at a certain speed. When the crushing cylinder 11 rotates, the centrifugal force drives the crushing balls 17 and the quartz blocks to rise. When the quartz blocks and crushing balls 17 fall from the height, they can impact the crushing cylinder. The quartz blocks inside the 11 are crushed and ground (the principle is the same as that of a ball mill). Multiple protruding rods 12 are fixedly installed inside the crushing cylinder 11. When the crushing cylinder 11 rotates, the protruding rods 12 make it easier for the crushing balls 17 and the quartz blocks to rise. Several leakage holes are opened on the crushing cylinder 11 to discharge the required quartz sand particles. While the crushing cylinder 11 is continuously grinding and discharging quartz sand, the quartz blocks inside the crushing cylinder 11 are continuously replenished through the feed bin 3 and the conveying mechanism, thereby ensuring the continuous crushing of the quartz blocks.When the discharge hole becomes clogged or the crushing ball 17 and quartz blocks pile up, causing a decrease in the crushing rate, quartz blocks or quartz sand can easily accumulate inside the crushing cylinder 11. If the feeding speed is not controlled in time, the accumulation inside the crushing cylinder 11 will become increasingly severe, thus affecting the crushing effect of the crushing cylinder 11 on the quartz blocks. Initially, in the same amount of time, the mass of quartz sand particles discharged from the crushing cylinder 11 is greater than the mass of material fed from the feed hopper 3. When uncrushed quartz blocks or quartz sand particles accumulate inside the crushing cylinder 11... The weight of the quartz sand inside the crushing cylinder 11 increases significantly. Under gravity, the two fixed rings 13 move downwards. As the fixed rings 13 move downwards, they pull the two ropes 37 downwards, which in turn pulls the toothed ring 35 to rotate. When the toothed ring 35 rotates, the first baffle 31 and the second baffle 32 move towards the center of the feed hopper 3, thereby reducing the discharge opening area of ​​the feed hopper 3 and slowing down the discharge speed. This prevents the quartz sand from accumulating inside the crushing cylinder 11 due to the feeding speed exceeding the discharge speed.

[0041] Specifically, a connecting ring 372 is fixedly installed on one of the fixed rings 13, and the pull rope 37 passes through the connecting ring 372. Each toothed ring 35 is fixedly equipped with a winding drum 36, and the two ends of the pull rope 37 are respectively wound around the outer circumference of the two winding drums 36. Two rope-passing holes 101 are opened on the side of the housing 1 near the feed hopper 3. Two rope guide frames 371 are fixedly installed on the conveying mechanism. The middle part of the pull rope 37 passes through the connecting ring 372, and the two ends of the pull rope 37 pass through the two rope-passing holes 101 and the two rope guide frames 371 respectively, and are wound around the winding drums 36. 1. It can prevent the pull rope 37 from interfering with the operation of other components. When quartz sand accumulates in the crushing cylinder 11, the crushing cylinder 11 drives the two fixed rings 13 to descend. At this time, the middle part of the pull rope 37 is pulled downward through the connecting ring 372. In the initial state, the pull rope 37 is in a taut state. When the middle part of the pull rope 37 moves downward, the two ends of the pull rope 37 also move towards the direction close to the connecting ring 372, thereby driving the winding cylinder 36 and the corresponding toothed ring 35 to rotate, thereby causing the first baffle 31 and the second baffle 32 to be displaced, thereby reducing the discharge port of the feed bin 3.

[0042] Furthermore, each winding drum 36 has a torsion spring 38 fixedly installed between its inner wall and the feed bin 3; each winding drum 36 has a rotating rod 39 rotatably installed between its inner wall and the feed bin 3. The rotating rod 39 limits the torsion spring 38. When the crushing drum 11 descends and pulls the rope 37 to rotate the toothed ring 35 and the winding drum 36, each torsion spring 38 is in a twisted state. When the quartz sand accumulated in the crushing drum 11 returns to its original crushing and discharge speed, the weight of the crushing drum 11 is reduced. At this time, the crushing drum 11 rises, and the two ends of the rope 37 are wound around the corresponding winding drum 36 again through the torsion spring 38.

[0043] Furthermore, both sides of the first baffle 31 are fixedly provided with first toothed plates 33 that mesh with the toothed ring 35, and both sides of the second baffle 32 are fixedly provided with second toothed plates 34 that mesh with the toothed ring 35; for example Figure 5 As shown, each first toothed plate 33 and second toothed plate 34 are paired up, with the first toothed plate 33 and second toothed plate 34 on the same side forming a group. The first toothed plate 33 and second toothed plate 34 in the same group are set on the upper and lower sides of the corresponding toothed ring 35. When the pull rope 37 moves down and pulls the two winding drums 36 to rotate, it can drive the two toothed rings 35 to rotate. When the two toothed rings 35 rotate, they drive each first toothed plate 33 and second toothed plate 34 to move, thereby causing the first baffle 31 and the second baffle 32 to move closer to the middle of the feed bin 3, thereby reducing the discharge opening of the feed bin 3 and reducing the discharge speed of the feed bin 3.

[0044] In another embodiment of the present invention: the conveying mechanism includes a conveying cylinder 2 fixedly disposed on the outside of the housing 1, a spiral feed roller 21 rotatably disposed inside the conveying cylinder, two second telescopic rods 22 fixedly disposed at one end of the spiral feed roller 21 near the crushing cylinder 11, and the end of each second telescopic rod 22 away from the spiral feed roller 21 being fixedly connected to the inner wall of the crushing cylinder 11; a drive motor 5 is fixedly disposed at one end of the conveying cylinder 2 away from the housing 1, the output end of the drive motor 5 being fixedly connected to the spiral feed roller 21, and a feed hole 201 for quartz blocks to fall into is provided on the conveying cylinder 2, the feed hole 201 being located directly below the feed bin 3, the spiral feed roller 21 is rotated by the drive motor 5, and the quartz blocks falling into the conveying cylinder 2 are conveyed by the spiral feed roller 21. Inside the crushing cylinder 11, the conveying cylinder 2 is connected to the housing 1. The diameter of the conveying cylinder 2 is smaller than the diameter of the crushing cylinder 11. When the crushing cylinder 11 moves up and down, the conveying cylinder 2 will not obstruct the crushing cylinder 11. Two second telescopic rods 22 are fixedly installed on both sides of the end of the spiral feed roller 21. The end of the spiral feed roller 21 away from the drive motor 5 extends slightly into the crushing cylinder 11 and is fixedly connected to the two second telescopic rods 22. When the spiral feed roller 21 rotates, it drives the crushing cylinder 11 to rotate through the two second telescopic rods 22. This lifts the crushing balls 17 and quartz blocks inside the crushing cylinder 11 through centrifugal force. When the crushing cylinder 11 moves up and down, the spiral feed roller 21 can still drive the crushing cylinder 11 to rotate through the extension and retraction of the two second telescopic rods 22.

[0045] Furthermore, a fixed rod 23 is fixedly installed on the top of the conveying cylinder 2, and a sliding rod 25 is slidably installed on the fixed rod 23. An anti-blocking plate 26 is fixedly installed at the end of the sliding rod 25 near the feed bin 3. The fixed rod 23 is fixedly installed in the feed hole 201 at the top of the conveying cylinder 2. The anti-blocking plate 26 can limit the sliding rod 25. The anti-blocking plate 26 is located between the first baffle 31 and the second baffle 32. When the drive motor 5 drives the spiral feed roller 21 to rotate, the spiral feed roller 21 drives the anti-blocking plate 26 to move up and down, thereby shaking the quartz block in the feed bin 3 up and down, thus preventing the quartz block from blocking between the first baffle 31 and the second baffle 32 and affecting the feeding.

[0046] Specifically, an abutment ball 24 is fixedly installed at the end of the slide bar 25 away from the feed bin 3. In the initial state, the bottom of the abutment ball 24 is slightly lower than the top of the spiral blade on the spiral feed roller 21. When the spiral feed roller 21 rotates, the spiral blade of the spiral feed roller 21 will intermittently abut against the bottom of the abutment ball 24 and lift the abutment ball 24. When the spiral blade of the spiral feed roller 21 abuts against the abutment ball 24, the abutment ball 24 is lifted, and the quartz block in the feed bin 3 is also lifted. When the spiral blade of the spiral feed roller 21 separates from the abutment ball 24, the abutment ball 24 falls back to the initial position by the gravity of the abutment ball 24 and the anti-blocking plate 26. This allows the abutment ball 24 and the anti-blocking plate 26 to move up and down intermittently, thereby preventing the quartz block in the feed bin 3 from becoming blocked.

[0047] In another embodiment of the present invention: a fixing plate 14 is provided at the bottom of each fixing ring 13, and a first telescopic rod 15 is fixedly provided between each fixing plate 14 and each fixing ring 13 in a one-to-one correspondence. A spring 16 is sleeved on each first telescopic rod 15, and each fixing plate 14 is fixedly connected to the inner wall of the housing 1.Each fixed plate 14 has two first telescopic rods 15. Each spring 16 is fixedly connected at both ends to the corresponding fixed plate 14 and fixed ring 13. The first telescopic rods 15 and springs 16 support the crushing cylinder 11. When quartz blocks accumulate inside the crushing cylinder 11 due to insufficient crushing, the weight of the crushing cylinder 11 increases, causing it to move downwards. The springs 16 are compressed, reducing the feeding speed of the feed hopper 3. As the accumulated quartz blocks inside the crushing cylinder 11 are fully crushed and discharged, the weight of the crushing cylinder 11 gradually decreases. The elastic force of the springs 16 lifts the crushing cylinder 11 back to its initial position. At this time, the torsion spring 38 causes the ends of the pull rope 37 to wind around the winding drum 36 again. 16. Increasing the weight inside the crushing cylinder 11 slows down the feeding speed of the feed hopper 3. Reducing the weight inside the crushing cylinder 11 restores the feeding speed of the feed hopper 3, thus passively controlling the feeding speed of the feed hopper 3 in real time. When the crushing ball 17 falls from a high point inside the crushing cylinder 11, it generates a downward impact force on the crushing cylinder 11. At this time, the spring 16 causes the crushing cylinder 11 to vibrate up and down, causing the quartz sand particles at the bottom of the crushing cylinder 11 to shake, dispersing the quartz sand particles blocking the discharge hole of the crushing cylinder 11, accelerating the feeding of quartz sand particles. Furthermore, due to the up and down vibration of the crushing cylinder 11, the crushing ball 17 and quartz blocks accumulated inside the crushing cylinder 11 can be dispersed, thereby making the bottom of the crushing cylinder 11... The quartz blocks in the crushing cylinder 11 can make full contact with the falling crushing balls 17, thereby improving the crushing effect of the quartz sand. Since the crushing cylinder 11 is fixedly equipped with protruding rods 12, when the crushing cylinder 11 lifts the crushing balls 17 and quartz blocks by centrifugal force, due to the obstruction of the protruding rods 12 and the cooperation of centrifugal force, the number of crushing balls 17 and quartz blocks on the upper side of the protruding rods 12 will be greater than the number normally carried up by the inner wall of the crushing cylinder 11. When the crushing balls 17 and quartz blocks around the protruding rods 12 fall from a height, they will exert a large downward impact force on the inner wall of the crushing cylinder 11. At this time, the crushing cylinder 11 will drop a greater distance. Because there is a certain distance between adjacent protruding rods 12, the crushing cylinder 11... The impact force is intermittent, and the springs 16 cause the crushing cylinder 11 to oscillate up and down intermittently with a large amplitude. When the crushing cylinder 11 moves downward, the top of the crushing cylinder 11 applies a downward force to the crushing ball 17 and the quartz block at the top of the crushing cylinder 11, thereby increasing the speed at which the crushing ball 17 and the quartz block collide with the quartz block at the bottom of the crushing cylinder 11, thus increasing the impact force. When the crushing cylinder 11 moves upward, the quartz block at the bottom of the crushing cylinder 11 has an initial upward velocity. At this time, the quartz block at the bottom of the crushing cylinder 11 and the crushing ball 17 falling from the top of the crushing cylinder 11 move in opposite directions, thereby increasing the impact speed and impact force, and improving the crushing effect of the quartz block.

[0048] Specifically, a feeding funnel 4 is fixedly installed at the bottom of the shell 1; the quartz sand particles that fall from the discharge hole of the crushing cylinder 11 are fed through the feeding funnel 4, thus facilitating collection.

[0049] Working principle: When the quartz sand in the crushing cylinder 11 becomes clogged, causing untimely crushing and slow discharge, the weight of the crushing cylinder 11 increases, causing it to shift downwards. The springs 16 compress, pulling the two toothed rings 35 via the rope 37, causing them to rotate. This, in turn, controls the first baffle 31 and the second baffle 32 to move towards the center of the feed hopper 3 via the first toothed plate 33 and the second toothed plate 34, narrowing the discharge opening and slowing the discharge speed. When the accumulated quartz blocks in the crushing cylinder 11 are fully crushed and discharged through the discharge hole, the weight of the crushing cylinder 11 gradually returns to normal. At this point, the springs 16 push the crushing cylinder back into place. 11 is lifted back to the normal position, and the two ends of the pull rope 37 are wound around the winding drum 36 again by the torsion spring 38. Through the cooperation of the spring 16 and the pull rope 37, the feeding speed of the feed hopper 3 can be passively controlled in real time by gravity. When the crushing balls 17 and quartz blocks in the crushing drum 11 fall from a height, the spring 16 can make the crushing drum 11 vibrate up and down, which can disperse the quartz blocks accumulated in the crushing drum 11, which helps to crush the quartz sand. At the same time, it can also shake away the quartz sand particles blocking the discharge hole of the crushing drum 11, thereby accelerating the flow of crushed quartz sand particles out of the crushing drum 11.

[0050] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A quartz sand pickling circulation purification system, comprising the steps of: ore dressing and washing, sorting and sorting the quartz ore, placing the selected quartz ore into a grid box, then placing it into a cleaning tank, soaking it in clean water, then washing it with high-pressure water, and then filtering and drying it; Step 2: crushing and pulverizing, the quartz ore obtained in step 1 is calcined and crushed into quartz blocks with a particle size of 8-10 mm by a jaw crusher, and then put into a crushing device to be crushed into quartz sand particles of 60-120 mesh; Step 3: Pickling and recovery, the 60-120 mesh quartz sand particles obtained in step 2 are put into a pickling reactor containing a hydrochloric acid aqueous solution, wherein the hydrochloric acid concentration of the hydrochloric acid aqueous solution is 5-8%, the hydrochloric acid solution is heated to 75-85°C, stirred and reacted for 20-30 minutes, the acid solution is precipitated and discharged, ultrapure water is added, the quartz sand particles are stirred and washed for deacidification, and the hydrochloric acid solution is recovered; Step 4: Send the quartz sand particles after pickling in step 3 to an oven set at a temperature of 180°C for drying for 3 hours, close the oven, and take out the quartz sand particles after the oven cools down, and the pickling of the quartz sand is completed; It is characterized in that The pulverizing device comprises a housing (1), a feed bin (3), and a conveying mechanism, wherein the feed bin (3) is fixedly arranged on the conveying mechanism; A crushing cylinder (11) is rotatably arranged in the shell (1), and a plurality of crushing balls (17) for crushing quartz sand are placed in the crushing cylinder (11). Fixed rings (13) are rotatably arranged at both ends of the crushing cylinder (11), and both fixed rings (13) are slidably connected to the inner wall of the shell (1). A first baffle (31) and a second baffle (32) for controlling the feeding speed are slidably arranged on the feed bin (3). Gear rings (35) for controlling the movement of the first baffle (31) and the second baffle (32) are rotatably arranged on both sides of the feed bin (3), and a pull rope (37) is arranged between each gear ring (35) and the crushing cylinder (11). The crushing cylinder (11) controls the rotation of the gear ring (35) through gravity and the pull rope (37).

2. A quartz sand pickling circulation purification system according to claim 1, characterized in that: A connecting ring (372) is fixedly arranged on one of the fixing rings (13), and the pull rope (37) passes through the connecting ring (372). A winding drum (36) is fixedly arranged on each of the gear rings (35), and two ends of the pull rope (37) are respectively wound around the outer circumference of two winding drums (36).

3. A quartz sand pickling circulation purification system according to claim 2, characterized in that: A torsion spring (38) is fixedly arranged between the inner wall of each winding drum (36) and the feed bin (3).

4. A quartz sand pickling circulation purification system according to claim 3, characterized in that: First tooth plates (33) meshing with the toothed ring (35) are fixedly provided on both sides of the first baffle plate (31), and second tooth plates (34) meshing with the toothed ring (35) are fixedly provided on both sides of the second baffle plate (32).

5. A quartz sand pickling circulation purification system according to claim 4, characterized in that: The conveying mechanism comprises a conveying cylinder (2) fixedly arranged on the outside of a shell (1), a spiral feed roller (21) being rotatably arranged inside the conveying cylinder (2), two second telescopic rods (22) being fixedly arranged at one end of the spiral feed roller (21) close to the pulverizing cylinder (11), and one end of each of the second telescopic rods (22) away from the spiral feed roller (21) being fixedly connected to the inner wall of the pulverizing cylinder (11).

6. A quartz sand pickling circulation purification system according to claim 5, characterized in that: A fixed rod (23) is fixedly arranged on the top of the conveying cylinder (2), a sliding rod (25) is slidably arranged on the fixed rod (23), and an anti-blocking plate (26) is fixedly arranged on one end of the sliding rod (25) close to the feed bin (3).

7. A quartz sand pickling circulation purification system according to claim 6, characterized in that: An abutment ball (24) is fixedly provided at one end of the slide rod (25) away from the feed bin (3).

8. A quartz sand pickling circulation purification system according to claim 7, characterized in that: A fixing plate (14) is provided at the bottom of each fixing ring (13), and a first telescopic rod (15) is fixedly provided between each fixing plate (14) and each fixing ring (13) in a one-to-one correspondence, and each first telescopic rod (15) is sleeved with a spring (16), and each fixing plate (14) is fixedly connected to the inner wall of the shell (1).

9. A quartz sand pickling circulation purification system according to claim 8, characterized in that: A material discharge funnel (4) is fixedly arranged at the bottom of the shell (1).

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