High-purity quartz sand high-efficiency preparation device assisted by composite additive
By introducing an acid washing screen and stirring rod into the quartz sand preparation device, combined with a delivery pump and steel wire system, uniform distribution and circulation of the acid washing solution are achieved, solving the problem of uneven mixing during the acid washing process of quartz sand and improving the preparation efficiency and purity of high-purity quartz sand.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FENGYANG COUNTY DAEWOO QUARTZ CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-07-10
AI Technical Summary
In the existing technology, the acid washing process of quartz sand has uneven mixing effect of the acid washing solution, resulting in low acid washing efficiency, which is especially difficult to meet the requirements when preparing high-purity quartz sand.
The high-purity quartz sand preparation device, which uses composite additives, achieves uniform distribution and circulation of the pickling solution through the design of the pickling mesh cylinder and stirring rod inside the reactor, combined with the delivery pump and steel wire system, ensuring that the quartz sand and acid solution are in full contact and react.
It improved pickling efficiency, enhanced impurity removal efficiency, shortened the pickling cycle, improved the purity and quality stability of quartz sand, and reduced equipment corrosion and wear.
Smart Images
Figure CN224475004U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of quartz sand preparation technology, and in particular to a high-efficiency preparation device for high-purity quartz sand with the assistance of composite additives. Background Technology
[0002] High-purity quartz sand requires multi-stage processing. Quartz ore is crushed to 0.1-0.5mm using a jaw crusher and ball mill, then graded by a vibrating screen to ensure uniform particle size. Magnetic separators remove magnetic impurities (such as Fe3O4), and photoelectric separation separates light minerals such as feldspar and mica. Subsequently, it undergoes acid washing for chemical purification, flotation, high-temperature chlorination roasting, ultrasonic cleaning for fine separation, high-gradient magnetic separation, and ICP-MS detection. During the acid washing process, composite additives are added to assist in the removal of metals such as Al and Fe.
[0003] Chinese patent discloses a quartz sand pickling device (authorization announcement number CN222856134U). This patented technology aims to solve the problem that when the amount of quartz sand being picked is large, the effect of the impact nozzle in moving the quartz sand upwards deteriorates, leading to a decrease in the mixing effect between the quartz sand and the pickling solution, thus reducing the pickling effect. The device includes a housing that tapers at the bottom. A fixing ring is fixedly fitted onto the outside of the housing, and a side plate is installed on the outer side of the fixing ring. A circulation component is installed on the upper surface of the side plate, and an pickling mesh cylinder is installed inside the housing. This quartz sand pickling device, through the circulation component, ensures uniform contact between the pickling solution and the quartz sand, preventing insufficient pickling of quartz sand in the middle. Even with a large quantity of quartz sand, the mixing effect between the quartz sand and the pickling solution is not affected, ensuring the pickling effect on the quartz sand. The nozzle tapers towards one side of the housing, facilitating increased spray pressure and improving the penetration of the pickling solution through the quartz sand.
[0004] However, this patent still has shortcomings. While it circulates and recirculates the pickling solution in the quartz sand preparation pickling process to provide the pickling effect, the pickling process requires the delivery of composite additives. Direct addition before pickling also requires sufficient mixing time. Furthermore, the pickling reaction between the pickling solution and the quartz sand is not efficient due to the single-point suction of the pickling solution at a fixed location, making it difficult to meet the requirements for high-efficiency preparation. Therefore, those skilled in the art have provided a high-purity quartz sand preparation device assisted by composite additives to solve the problems mentioned in the background art. Utility Model Content
[0005] Technical solution
[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0007] This utility model relates to a high-efficiency preparation device for high-purity quartz sand assisted by composite additives, comprising a vessel body, a delivery pump, a delivery pipe, a steel wire, an acid washing screen, and a second motor. The vessel body has a top cover, and the second motor is mounted on the top cover. A rotating shaft, rotatably mounted inside the top cover, is mounted on the output end of the second motor. Multiple sets of stirring rods arranged in a circular array are mounted on the outer wall of the rotating shaft. An acid washing screen is mounted on the inner wall of the vessel body. A sealing ring is embedded in the inner wall of the upper end of the vessel body, and a steel wire is slidably mounted inside the sealing ring. The first motor is mounted at one end of the vessel body. The motor has an output end equipped with a reel for winding the steel wire. A material cylinder is provided at one end of the reactor body. A conveying pump with a suction end connected to the material cylinder is provided at the lower end of the material cylinder. A conveying pipe penetrating the reactor body is provided at the conveying end of the conveying pump. A flexible hose sleeved on the outside of the pickling screen cylinder is provided in the middle section of the conveying pipe inside the reactor body. One end of the steel wire is connected to one end of the conveying pipe. A counterweight is provided at the opening of the conveying pipe. A suction pipe located outside the pickling screen cylinder and penetrating the suction end of the conveying pump is provided inside the reactor body. A control valve is provided inside the suction pipe.
[0008] Furthermore, the outer wall of the pickling mesh cylinder is provided with support rods arranged in a ring array and connected to the inner wall of the reactor at both ends;
[0009] Specifically, the support rods support the outer wall of the pickling cylinder, thereby increasing the overall strength of the pickling cylinder.
[0010] Furthermore, a discharge pipe is connected to the lower end of the vessel body, and a liquid drain pipe is connected to one side of the lower end of the vessel body. Both the discharge pipe and the liquid drain pipe are equipped with a control valve.
[0011] Specifically, the acid-washed quartz sand is discharged through the discharge pipe, and the acid washing liquid is discharged through the drain pipe. The opening and closing of the discharge pipe and the drain pipe are controlled by the control valve two.
[0012] Furthermore, a sleeve is fitted around the outside of the stirring rod, and symmetrically distributed sealed bearings that are rotatably mounted with the stirring rod are embedded in the inner wall of the sleeve.
[0013] Specifically, when the stirring rod stirs the quartz sand, the friction and resistance are reduced by the rotating sleeve on the outer wall.
[0014] Furthermore, guide wheels that slide and are mounted on the steel wire are fixed on both the inner and outer sides of the vessel body, and limiting wheels that are symmetrically distributed and located on the outer side of the steel wire are sleeved on the outer wall of the reel. A bearing bracket that is rotatably mounted on the outer wall of the vessel body is provided.
[0015] Specifically, the guide wheel provides rolling support for the steel wire, the limit wheel limits the winding and unwinding of the steel wire, and the bearing bracket provides rotational support for the reel, so that the reel rotates stably.
[0016] Furthermore, a slider is provided at one end of the conveying pipe, and a guide rail is provided on the inner wall of the vessel, with the slider slidably mounted on the outer wall of the guide rail;
[0017] Specifically, the slider slides on the outer wall of the guide rail, providing longitudinal sliding guidance to the end of the conveying pipe, thus restricting the movement path of the counterweight and preventing it from impacting the internal structure of the vessel.
[0018] Furthermore, a negative pressure pipe and a feed inlet are connected and installed at the upper end of the top cover, an installation frame is sleeved on the outer side of the vessel body, a support frame connected to the installation frame is sleeved on the outer wall of the vessel body, and a hydraulic rod with a telescopic end connected to the top cover is provided inside the upper end of the installation frame.
[0019] Specifically, the negative pressure pipe is connected to the flexible pipeline to transport the harmful acid mist generated during the pickling process to the two-stage alkaline spray tower for purification. The top cover is driven to move longitudinally by the hydraulic rod, which facilitates the opening and closing control of the upper part of the vessel. The support frame is supported by the mounting frame to fix the vessel. Quartz sand is fed into the vessel through the feed port.
[0020] Beneficial effects
[0021] Compared with existing technologies, the advantages of this utility model are:
[0022] In this invention, quartz sand is transported into the reactor body and carried by an acid washing mesh. A pre-mixed HF-HCl acid solution is then transported into the reactor body. During transport, the outlet of the flexible hose moves longitudinally, outputting at different heights within the reactor body. This ensures uniform distribution of the HF-HCl acid solution within the reactor body, thus minimizing mixing time. HF preferentially dissolves silicate inclusions on the quartz surface (SiO2 + 6HF → H2SiF6 + 2H2O), releasing internal metal impurities. HCl reacts with metal oxides (Fe2O3 + 6HCl → 2FeCl3 + 3H2O), forming soluble chlorides that enter the solution. HF in the composite additive disrupts the quartz surface structure, while HCl further dissolves exposed metal oxides, improving impurity removal efficiency. Simultaneously, the quartz sand is stirred during acid washing, and the acid washing solution is pumped and refluxed at different heights within the reactor body, enhancing acid washing efficiency. The acid washing solution and quartz sand fully contact and react, resulting in efficient preparation of the quartz sand during the acid washing process.
[0023] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;
[0026] Figure 2 This is a front-view three-dimensional structural diagram of the vessel body of this utility model;
[0027] Figure 3 This is a front-view three-dimensional structural diagram of the pickling mesh cylinder of this utility model;
[0028] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the vessel body of this utility model;
[0029] Figure 5 This is a top-section three-dimensional structural diagram of the sleeve of this utility model;
[0030] Figure 6 This is a front-view three-dimensional structural diagram of the guide rail of this utility model.
[0031] The attached diagram lists the components represented by each number as follows:
[0032] 1. Mounting frame; 2. Hydraulic rod; 3. Top cover; 4. Kettle body; 5. Support frame; 6. Conveying pump; 7. Material cylinder; 8. Conveying pipe; 9. Motor 1; 10. Discharge pipe; 11. Drain pipe; 12. Suction pipe; 13. Counterweight; 14. Steel wire; 15. Pickling screen cylinder; 16. Support rod; 17. Rotating shaft; 18. Feed inlet; 19. Motor 2; 20. Negative pressure pipe; 21. Stirring rod; 22. Sleeve; 23. Sealed bearing; 24. Reel; 25. Limiting wheel; 26. Bearing bracket; 27. Guide wheel; 28. Sealing ring; 29. Guide rail; 30. Slider; 31. Control valve 1; 32. Hose. Detailed Implementation
[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0034] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0035] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.
[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0037] Example
[0038] Please see Figure 1-6 As shown, this embodiment is a high-efficiency preparation device for high-purity quartz sand assisted by composite additives, including a vessel body 4, a delivery pump 6, a delivery pipe 8, a steel wire 14, an acid washing screen 15, and a second motor 19. A top cover 3 is provided at the upper end of the vessel body 4, and the second motor 19 is located at the upper end of the top cover 3. A rotating shaft 17, rotatably installed inside the top cover 3, is provided at the output end of the second motor 19. Multiple sets of stirring rods 21 arranged in a ring array are provided on the outer wall of the rotating shaft 17. The acid washing screen 15 is provided on the inner wall of the vessel body 4. A sealing ring 28 is embedded in the upper inner wall of the vessel body 4, and a steel wire 14 is slidably installed inside the sealing ring 28. A motor is located at one end of the vessel body 4. 19. The output end of motor 19 is equipped with a reel 24 for winding steel wire 14. One end of the reactor body 4 is equipped with a material cylinder 7. The lower end of the material cylinder 7 is equipped with a conveying pump 6 whose suction end is connected to the material cylinder 7. The conveying end of the conveying pump 6 is equipped with a conveying pipe 8 that penetrates the reactor body 4. The middle section of the conveying pipe 8 inside the reactor body 4 is equipped with a flexible hose 32 that is sleeved on the outside of the pickling screen cylinder 15. One end of steel wire 14 is connected to one end of the conveying pipe 8. A counterweight 13 is provided at the opening of the conveying pipe 8. Inside the reactor body 4, there is a suction pipe 12 located outside the pickling screen cylinder 15 and one end of which penetrates the suction end of the conveying pump 6. A control valve 31 is provided inside the suction pipe 12.
[0039] The outer wall of the pickling mesh cylinder 15 is provided with support rods 16 arranged in a ring array and connected to the inner wall of the reactor body 4 at both ends;
[0040] The lower end of the vessel body 4 is connected to a discharge pipe 10, and one side of the lower end of the vessel body 4 is connected to a drain pipe 11. Both the discharge pipe 10 and the drain pipe 11 are equipped with control valves.
[0041] A sleeve 22 is fitted onto the outer side of the stirring rod 21, and sealed bearings 23, which are symmetrically distributed and rotatably mounted with the stirring rod 21, are embedded in the inner wall of the sleeve 22.
[0042] Guide wheels 27 are fixed on both the inner and outer sides of the vessel body 4 and are slidably installed with the steel wire 14. Limiting wheels 25 are symmetrically distributed and located outside the steel wire 14 on the outer wall of the reel 24. Bearing brackets 26 are provided on the outer wall of the vessel body 4 and are rotatably installed with the reel 24.
[0043] A slider 30 is provided at one end of the conveying pipe 8, and a guide rail 29 is provided on the inner wall of the vessel body 4. The slider 30 is slidably installed on the outer wall of the guide rail 29.
[0044] The top cover 3 is connected to a negative pressure pipe 20 and a feed inlet 18. The outer side of the vessel body 4 is fitted with a mounting frame 1. The outer wall of the vessel body 4 is fitted with a support frame 5 connected to the mounting frame 1. The upper end of the mounting frame 1 is equipped with a hydraulic rod 2 whose telescopic end is connected to the top cover 3.
[0045] In this embodiment, after crushing and sorting, the quartz sand raw material with a particle size of 0.1-0.5mm is pretreated and then fed into the pickling screen 15 inside the reactor body 4 through the feed inlet 18 of the top cover 3. After the feed inlet 18 is closed, the top cover 3 is driven by the hydraulic rod 2 to seal and fit with the reactor body 4. The sealing ring 28 prevents acid mist leakage and ensures the pulling and moving of the steel wire 14. At the same time, the negative pressure pipe 20 is connected to the external two-stage alkaline spray tower to absorb the HF and HCl gases volatilized during the pickling process in real time, avoiding environmental pollution and personnel health risks.
[0046] The delivery pump 6 is started to draw the pre-mixed HF-HCl acid from the material cylinder 7 to the delivery pipe 8, and inject it into the reactor body 4 through the hose 32 in the middle section of the delivery pipe 8 and the delivery pipe 8 at the end. It enters the interior of the reactor body 4 through the pickling screen 15. The conditions for conveying pickling solution and composite additives are provided by the steel wire 14 and the hose 32. When the motor 9 drives the reel 24 to retract the steel wire 14, the outlet of the hose 32 moves longitudinally along the reactor body 4 with the counterweight 13, so that the acid solution and the composite additive HF-HCl acid mixture can be output from different heights. This breaks through the limitations of traditional single-point injection, increases the contact area between the acid solution and the quartz sand, shortens the mixing time, and avoids excessive corrosion or uneven reaction caused by excessively high local acid concentration.
[0047] When the motor 19 is turned on, the shaft 17 drives multiple sets of annular stirring rods 21 to rotate. The sleeve 22 on the outer wall of the stirring rod 21 reduces frictional resistance through the sealed bearing 23, thus pushing the quartz sand into full contact with the acid solution.
[0048] During this process:
[0049] HF preferential reaction: dissolves silicate inclusions on the quartz surface (SiO2 + 6HF → H2SiF6 + 2H2O), releasing internal metallic impurities such as Al³⁺ and Fe³⁺;
[0050] HCl has a synergistic effect: it reacts with exposed metal oxides (e.g., Fe2O3 + 6HCl → 2FeCl3 + 3H2O) to generate soluble chlorides that enter the solution;
[0051] Dynamic acid circulation: Acid permeates to the bottom of the vessel 4 through the pickling mesh 15. The flow rate and opening / closing of the control valve 31 are adjusted. After the composite additive HF-HCl is delivered, the control valve opens and the acid flows back to the delivery pump 6 through the suction pipe 12, forming a closed-loop circulation. The suction pipe 12 draws acid from different positions in the vessel 4 and circulates the acid inside the vessel 4 through the suction pipe 12. This avoids the local acid concentration drop caused by traditional single-point suction, ensures the uniformity of the reaction system, and improves the removal rate of metal impurities.
[0052] After pickling is completed, the stirring and circulation system is turned off. The waste acid is discharged to the neutralization tank through the drain pipe 11 by the control valve 2 and Ca(OH)2 is added to generate CaF2 precipitate. Then, the quartz sand is discharged to the ultrasonic cleaning tank through the discharge pipe 10 to remove residual impurities on the surface. The hose 32 dynamically injects and works in conjunction with the stirring rod 21 to shorten the pickling cycle. The negative pressure acid mist recovery system and waste acid regeneration reduce the emission of toxic substances.
[0053] By using longitudinal acid distribution and circulation, the problem of insufficient central pickling in traditional processes is solved, and the fluctuation range of quartz sand purity is compressed. It is worth noting that the outer wall support rod 16 of the pickling screen cylinder 15 enhances the structural strength, and the use of corrosion-resistant components such as PTFE-lined hose 32, slider 30, guide rail 29, and counterweight 13 reduces equipment wear caused by HF corrosion.
[0054] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0055] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A high-efficiency preparation device for high-purity quartz sand assisted by composite additives, comprising a vessel body (4), a delivery pump (6), a delivery pipe (8), a steel wire (14), an acid washing screen (15), and a second motor (19), characterized in that: The upper end of the vessel body (4) is provided with a top cover (3), and the upper end of the top cover (3) is provided with a second motor (19). The output end of the second motor (19) is provided with a rotating shaft (17) rotatably installed inside the top cover (3). The outer wall of the rotating shaft (17) is provided with multiple sets of stirring rods (21) arranged in a ring array. The inner wall of the vessel body (4) is provided with an acid washing screen (15). The upper inner wall of the vessel body (4) is embedded with a sealing ring (28). A steel wire (14) is slidably installed inside the sealing ring (28). One end of the vessel body (4) is provided with a first motor (9). The output end of the first motor (9) is provided with a winding shaft (24) for winding the steel wire (14). A material cylinder (7) is provided at one end. A conveying pump (6) with a suction end connected to the material cylinder (7) is provided at the lower end of the material cylinder (7). A conveying pipe (8) that penetrates the vessel body (4) is provided at the conveying end of the conveying pump (6). A flexible hose (32) that is sleeved on the outside of the pickling screen cylinder (15) is provided in the middle section of the conveying pipe (8) inside the vessel body (4). One end of the steel wire (14) is connected to one end of the conveying pipe (8). A counterweight (13) is provided at the opening of the conveying pipe (8). A suction pipe (12) located outside the pickling screen cylinder (15) and with one end penetrating the suction end of the conveying pump (6) is provided inside the suction pipe (12). A control valve (31) is provided inside the suction pipe (12).
2. The high-efficiency preparation device for high-purity quartz sand assisted by composite additives according to claim 1, characterized in that: The outer wall of the pickling mesh cylinder (15) is provided with support rods (16) arranged in a ring array and connected to the inner wall of the reactor body (4) at both ends.
3. The high-efficiency preparation device for high-purity quartz sand assisted by composite additives according to claim 1, characterized in that: The lower end of the vessel body (4) is connected to a discharge pipe (10), and one side of the lower end of the vessel body (4) is connected to a drain pipe (11). Both the discharge pipe (10) and the drain pipe (11) are equipped with control valves.
4. The high-efficiency preparation device for high-purity quartz sand assisted by composite additives according to claim 1, characterized in that: A sleeve (22) is fitted around the outside of the stirring rod (21), and sealed bearings (23) are symmetrically distributed and rotatably mounted with the stirring rod (21) embedded in the inner wall of the sleeve (22).
5. The high-efficiency preparation device for high-purity quartz sand assisted by composite additives according to claim 1, characterized in that: The inner and outer sides of the vessel body (4) are fixed with guide wheels (27) that are slidably installed with the steel wire (14). The outer wall of the reel (24) is sleeved with symmetrically distributed limiting wheels (25) located outside the steel wire (14). The outer wall of the vessel body (4) is provided with a bearing bracket (26) that is rotatably installed with the reel (24).
6. The high-efficiency preparation device for high-purity quartz sand assisted by composite additives according to claim 1, characterized in that: A slider (30) is provided at one end of the conveying pipe (8), and a guide rail (29) is provided on the inner wall of the vessel body (4). The slider (30) is slidably installed on the outer wall of the guide rail (29).
7. The high-efficiency preparation device for high-purity quartz sand assisted by composite additives according to claim 1, characterized in that: The top cover (3) is connected to a negative pressure pipe (20) and a feed inlet (18). The outer side of the vessel body (4) is fitted with a mounting bracket (1). The outer wall of the vessel body (4) is fitted with a support bracket (5) connected to the mounting bracket (1). The upper end of the mounting bracket (1) is provided with a hydraulic rod (2) whose telescopic end is connected to the top cover (3).