Continuous quartz sand acid leaching equipment

Abstract

The invention provides continuous quartz sand acid leaching equipment, which belongs to the technical field of quartz sand processing and comprises a pre-grinding part, an acid leaching assembly, a material transferring mechanism, a transverse grinding barrel, an extrusion grinding rod, a conveying fin and an extrusion grinding area. The pre-grinding part comprises a transversely-arranged grinding barrel, conveying fins are arranged on the inner wall of the transversely-arranged grinding barrel, an extrusion grinding rod is arranged in the transversely-arranged grinding barrel, and an extrusion grinding area is formed between the bottom of the extrusion grinding rod and the conveying fins; acid leaching assemblies are arranged outside the pre-grinding part, and a material transferring mechanism is arranged between the acid leaching assemblies. According to the device, through the extrusion grinding rod and the conveying fins in the transverse grinding barrel, an extrusion grinding area is formed at the bottom of the extrusion grinding rod, and through rotation of the transverse grinding barrel and pushing of the conveying fins, the grinding efficiency is improved; and the quartz sand is accumulated in the extrusion grinding area and makes contact with the extrusion grinding rod for extrusion grinding, and impurities such as clay minerals attached to the surface of the quartz sand are removed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of quartz sand processing, and particularly relates to a continuous quartz sand acid leaching equipment. BACKGROUND

[0002] Natural quartz sand (such as vein quartz and weathered products of quartzite) mainly contains silicon dioxide, but is often accompanied by various impurities, which directly affect the use performance of the quartz sand, and acid washing is one of the most effective chemical purification methods. The core purpose of acid washing and purification of quartz sand is to remove various impurities contained in natural quartz sand to meet the stringent requirements of downstream high-end industries on the purity and performance of quartz materials.

[0003] However, the existing technology mixes and proportionally mixes various acid liquids such as hydrochloric acid and hydrofluoric acid, and then puts the quartz sand into a reaction kettle together with the acid liquid to perform acid washing and purification on the quartz sand. Silicon dioxide is dissolved in hydrofluoric acid. When the quartz sand after acid washing is not washed thoroughly, fine fluorosilicic acid powder is easily generated, micro-bubbles are easily generated during the production of quartz products, and tail gas polluting the environment is easily generated after the hydrofluoric acid participates in the acid washing solution. SUMMARY

[0004] In view of the above problems, the present application aims to at least partially solve the problems in the background art by providing a continuous quartz sand acid leaching equipment.

[0005] The technical scheme adopted by the present application is as follows: a continuous quartz sand acid leaching equipment is provided, which comprises a horizontal polishing cylinder, an extrusion grinding rod is arranged inside the horizontal polishing cylinder, a plurality of conveying fins are fixedly connected to the inner wall of the horizontal polishing cylinder and uniformly distributed along the inner wall, the extrusion grinding rod is located at the center of the horizontal polishing cylinder and is slightly lower, and an extrusion polishing area is formed between the bottom of the extrusion grinding rod and the conveying fins; an acid leaching assembly comprises a horizontal stirring cylinder, a plurality of uniformly distributed stirring conveying fins are fixedly connected to the inner wall of the horizontal stirring cylinder, and an acid leaching channel is formed between adjacent stirring conveying fins; wherein a material transfer mechanism is arranged between the pre-polishing part and the acid leaching assembly, and the material transfer mechanism is configured to transfer the quartz sand with surface impurities removed by polishing in the horizontal polishing cylinder to the horizontal stirring cylinder.

[0006] Further, a first mounting bracket is arranged outside the horizontal polishing cylinder, a second mounting bracket is arranged outside the horizontal stirring cylinder, both ends of the horizontal polishing cylinder are rotatably connected to both ends of the inside of the first mounting bracket, and both ends of the horizontal stirring cylinder are rotatably connected to both ends of the inside of the second mounting bracket.

[0007] Further, the extrusion grinding rod is distributed along the axial direction of the transverse grinding cylinder, and both ends of the extrusion grinding rod are fixedly connected with mounting rods, the mounting rods are connected with the other end of the extrusion grinding rod and the first mounting frame, and a material sparse area is formed between the inside of the transverse grinding cylinder and the mounting rods.

[0008] Further, the first mounting frame and the second mounting frame are provided with feeding pipes on one side of the outside, and are provided with discharging pipes on the other side of the outside.

[0009] Further, the transverse grinding cylinder is provided with a hydrochloric acid drip irrigation pipeline, both ends of the hydrochloric acid drip irrigation pipeline extend from both ends of the first mounting frame to the outside of the transverse grinding cylinder, and the bottom of the hydrochloric acid drip irrigation pipeline supplies hydrochloric acid to the inside of the transverse grinding cylinder.

[0010] Further, the first mounting frame is provided with a waste acid treatment part, the material transferring mechanism and the waste acid treatment part are connected through the first reflux pipe, the transverse stirring cylinder and the waste acid treatment part are connected through the second reflux pipe, and the waste acid treatment part and the hydrochloric acid drip irrigation pipeline are connected through the third reflux pipe.

[0011] Further, the transverse grinding cylinder and the transverse stirring cylinder are provided with the driven gear rings with outward teeth on the outside, and the transverse grinding cylinder and the transverse stirring cylinder are driven to rotate through the driving assembly arranged on the mounting frame.

[0012] Beneficial effects: Through the extrusion grinding rod and the conveying fins in the transverse grinding cylinder, the extrusion grinding area is formed at the bottom of the extrusion grinding rod, the quartz sand is accumulated in the extrusion grinding area through the rotation of the transverse grinding cylinder and the pushing of the conveying fins, the quartz sand is in contact with the extrusion grinding rod for extrusion grinding and self-grinding between the quartz sands, the clay minerals and impurities attached to the surface of the quartz sand are removed, and the work of purification can be completed only by using hydrochloric acid as the pickling solution and cooperating with the heating mode. The quartz sand after pickling is easier to be washed and deacidified, and the pollution to the environment is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a front view schematic diagram of a continuous quartz sand acid leaching equipment according to an embodiment of the present application; Figure 2 It is a front view schematic diagram of a continuous quartz sand acid leaching equipment according to an embodiment of the present application; Figure 3 It is a front view schematic diagram of a continuous quartz sand acid leaching equipment according to an embodiment of the present application; Figure 4 It is a front view schematic diagram of a continuous quartz sand acid leaching equipment according to an embodiment of the present application; Figure 3A cross-sectional view of the device in the middle of A; Figure 5 A perspective view of an acid leaching assembly of a continuous quartz sand acid leaching device according to an embodiment of the present application.

[0014] Reference signs: 1, pre-polishing part; 2, acid leaching assembly; 3, material transferring mechanism; 4, horizontally placed polishing cylinder; 5, extruded grinding rod; 6, conveying fin; 7, extruded polishing area; 8, horizontally placed stirring cylinder; 9, stirring conveying fin; 10, acid leaching channel; 11, first mounting frame; 12, second mounting frame; 13, mounting rod; 14, material loosening area; 15, feeding pipe; 16, discharging pipe; 17, hydrochloric acid drip irrigation pipeline; 18, waste acid treatment part; 19, first reflux pipe; 20, second reflux pipe; 21, third reflux pipe; 22, driven gear ring.

[0015] The accompanying drawings are used to provide further understanding of the embodiments and constitute a part of the specification, which are used to explain the embodiments together with the embodiments and do not constitute a limitation on the embodiments. DETAILED DESCRIPTION

[0016] To make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0017] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments.

[0018] As described above, the prior art of acid washing purification of quartz sand is carried out by mixing and proportioning various acid liquids such as hydrochloric acid and hydrofluoric acid to carry out acid washing purification of quartz sand. Silicon dioxide will dissolve in hydrofluoric acid. When the acid-washed quartz sand is not washed thoroughly, fine fluorosilicic acid powder is easily generated, micro-bubbles are easily generated during the production of quartz products, and after hydrofluoric acid is involved in the acid washing solution, tail gas which pollutes the environment is easily generated.

[0019] In view of this, the application provides a continuous quartz sand acid leaching equipment, which forms an extrusion polishing area 7 at the bottom of the extrusion polishing rod 5 through the extrusion polishing rod 5 and the conveying fins 6 in the transverse polishing cylinder 4, and the quartz sand is accumulated in the extrusion polishing area 7 through the rotation of the transverse polishing cylinder 4 and the pushing of the conveying fins 6, and the quartz sand is in contact with the extrusion polishing rod 5 for extrusion polishing and self-polishing between the quartz sands, so that the clay minerals and other impurities attached to the surface of the quartz sand are removed, the acid washing solution can complete the purification work through the way of hydrochloric acid and heating, and it is easier to carry out water washing and deacidification work, after reacting with the impurity elements in the quartz sand, almost all of them generate metal chlorides, and then the quartz sand after acid pickling is cleaned by using pure water, which can be dissolved in the aqueous solution and discharged in the form of waste water, so that neutralization treatment is easier and the pollution to the environment is reduced.

[0020] As Figures 1-5 The application provides an acid leaching equipment, in particular a continuous quartz sand acid leaching equipment, which comprises a pre-polishing part 1, an acid leaching assembly 2 and a material transferring mechanism 3. The pre-polishing part 1 comprises a transverse polishing cylinder 4 and extrusion polishing rods 5 in the transverse polishing cylinder 4, the surface of the extrusion polishing rod 5 is provided with a plurality of uniformly distributed protrusions, which are used to contact the quartz sand in the transverse polishing cylinder 4 and polish the surface of the quartz sand, and a plurality of uniformly distributed conveying fins 6 are fixedly connected to the inner wall of the transverse polishing cylinder 4, so as to further increase the polishing intensity of the quartz sand, the conveying fins 6 are driven to move and convey the quartz sand in the transverse polishing cylinder 4 along with the rotation of the transverse polishing cylinder 4, the quartz sand in the transverse polishing cylinder 4 is stirred by the conveying fins 6, the extrusion polishing rod 5 is close to the bottom of the transverse polishing cylinder 4, the quartz sand falls from the top of the transverse polishing cylinder 4 downward along with the rotation of the inner wall of the transverse polishing cylinder 4, and then is pushed into the extrusion polishing area 7 formed between the bottom of the extrusion polishing rod 5 and the conveying fins 6, so as to increase the contact stress between the quartz sand and the extrusion polishing rod 5, and due to the extrusion, the accumulated quartz sand is dislocated and rubbed against each other after extrusion, so that the clay minerals and other impurities attached to the surface of the quartz sand are removed.

[0021] The pre-grinding section 1 also includes a first mounting bracket 11. The two ends of the horizontal grinding cylinder 4 are rotatably connected to the two inner ends of the first mounting bracket 11. A driven gear ring 22 is sleeved on the outside of the horizontal grinding cylinder 4, with the teeth of the driven gear ring 22 facing outwards. The driven gear ring 22 is driven by a drive assembly provided on the first mounting bracket 11. The drive assembly may include a drive motor and a drive gear. The drive gear is installed at the output end of the drive motor. Then, the drive gear meshes with the driven gear ring 22, driving the horizontal grinding cylinder. 4. To increase the efficiency of grinding the quartz sand inside the horizontal grinding cylinder 4, a hydrochloric acid drip irrigation pipe 17 is installed inside the horizontal grinding cylinder 4. Several evenly distributed acid outlet holes are opened at the bottom of the hydrochloric acid drip irrigation pipe 17. After the hydrochloric acid is added to the inside of the horizontal grinding cylinder 4, it performs preliminary acid washing and grinding on the quartz sand inside the horizontal grinding cylinder 4, so that they are carried out simultaneously. In order to reduce the corrosion of the pre-grinding part 1 and the acid immersion assembly 2 by hydrochloric acid, both the pre-grinding part 1 and the acid immersion assembly 2 are made of acid corrosion resistant materials.

[0022] An installation rod 13 is fixedly connected to both ends of the extrusion grinding rod 5. The other end of the installation rod 13 is connected to the inner ends of the first mounting frame 11. The installation rod 13 can be removed from the first mounting frame 11 to replace or repair the entire extrusion grinding rod 5. The radius of the installation rod 13 is smaller than that of the extrusion grinding rod 5. A material discharge area 14 is formed between the bottom of the installation rod 13 and the horizontal grinding cylinder 4, which can facilitate the feeding and discharging of materials into the inner ends of the pre-grinding section 1, reducing the accumulation of quartz sand in the inner ends of the horizontal grinding cylinder 4. A feed pipe 15 and a discharge pipe 16 are respectively provided at the outer ends of the first mounting frame 11.

[0023] Quartz sand discharged from the pre-grinding section 1 is processed and enters the interior of the acid leaching assembly 2. The acid leaching assembly 2 includes a horizontally placed stirring drum 8. Several uniformly distributed stirring and conveying fins 9 are fixedly connected to the inner wall of the horizontally placed stirring drum 8. The space between the stirring and conveying fins 9, in conjunction with the inner wall of the horizontally placed stirring drum 8, forms an acid leaching channel 10. The acid leaching channel 10 is used to contain quartz sand and hydrochloric acid and mix the two. The horizontally placed stirring drum 8 heats the quartz sand and hydrochloric acid mixed inside to remove surface impurities through a heating device, heating it to 100~120℃. The layer material in contact with the horizontally placed stirring drum 8, the stirring and conveying fins 9, the quartz sand, and the hydrochloric acid can be made of polytetrafluoroethylene, which is resistant to strong acids and can be used at temperatures up to 120℃. After heating to 100~120℃, the quartz sand lattice system can be completely open. During the acid leaching process, the hydrochloric acid penetrates into the interior of the quartz lattice system, dissolving the internal impurity phases and improving the purity of the acid-leached quartz sand.

[0024] And only using hydrochloric acid as pickling material, almost can react with all the impurities except SiO2, while also ensure the quartz sand crystal not to be damaged. When the inside of the horizontal stirring cylinder 8 is heated to 100~120℃, at this time the quartz sand in the reactor is fluffy, its lattice system will produce expansion, the quartz sand will produce cracks, and the HCl in the horizontal stirring cylinder 8 is affected by high temperature from liquid to gaseous state, gaseous HCl into the quartz sand lattice inside the cycle, with the impurities trace elements Al, Ca, Cu, Fe, K, Li, Na, Cr, Mn, Ti, etc. in quartz sand, and can remove a large number of impurity elements contained in the solid quartz sand inclusion. By using the change of the thermal expansion coefficient, the impurities in the quartz sand can be fully exposed, and the HCl gas can fully immerse into the quartz lattice system to react with harmful elements, so as to achieve the purpose of purifying quartz sand. And using hydrochloric acid as pickling material, after reaction with impurity elements in quartz sand, almost all generate metal chloride salt, then using pure water to clean the pickled quartz sand, which can be dissolved in aqueous solution and discharged in the form of waste water, which is easier to neutralize and reduce environmental pollution.

[0025] The material transfer mechanism 3 is arranged between the pre-polishing part 1 and the acid leaching assembly 2, which can remove impurities and other treatments for the quartz sand polished by the pre-polishing part 1, and then transfer the treated quartz sand to the inside of the horizontal stirring cylinder 8. The quartz sand discharged from the horizontal polishing cylinder 4 needs to be screened during the transfer process of the material transfer mechanism 3. In addition to screening the particle size of the quartz sand, the screening also needs to be performed on whether the impurities on the surface of the quartz sand are completely removed. Only the quartz sand with qualified surface impurities can be transferred to the inside of the horizontal stirring cylinder 8 through the material transfer mechanism 3 to form a continuous acid leaching operation.

[0026] The second mounting bracket 12 is arranged outside the horizontal stirring cylinder 8, and the two ends of the horizontal stirring cylinder 8 are rotatably connected to the two ends inside the second mounting bracket 12. The driven gear ring 22 outside the horizontal stirring cylinder 8 is driven by the driving assembly on the second mounting bracket 12 to drive the horizontal stirring cylinder 8 to rotate. The two ends outside the second mounting bracket 12 are also provided with the feeding pipe 15 and the discharging pipe 16, and the feeding pipe 15 on the second mounting bracket 12 is close to the material transfer mechanism 3. The waste acid treatment part 18 is arranged outside the horizontal polishing cylinder 4, and the material transfer mechanism 3 and the waste acid treatment part 18 are connected through the first reflux pipe 19. The horizontal stirring cylinder 8 and the waste acid treatment part 18 are connected through the second reflux pipe 20, and the waste acid treatment part 18 and the hydrochloric acid drip irrigation pipeline 17 are connected through the third reflux pipe 21. The residual hydrochloric acid in the horizontal stirring cylinder 8 and the quartz sand, and the residual hydrochloric acid in the horizontal polishing cylinder which is not reacted completely, can be transported to the inside of the hydrochloric acid drip irrigation pipeline after being treated by the waste acid treatment part 18, so as to fully use the hydrochloric acid.

[0027] In summary, the continuous quartz sand acid leaching equipment has the following advantages: By extruding the grinding rod 5 and the conveying fin 6 in the transverse polishing cylinder 4, an extrusion polishing area 7 is formed at the bottom of the extrusion grinding rod 5. Through the rotation of the transverse polishing cylinder 4 and the pushing of the conveying fin 6, the quartz sand is accumulated in the extrusion polishing area 7, and the extrusion polishing and self-grinding between the quartz sand are carried out to remove the impurities such as clay minerals attached to the surface of the quartz sand. The acid washing solution can complete the purification work by means of hydrochloric acid and heating, and it is easier to carry out water washing and deacidification work. After reacting with the impurity elements in the quartz sand, almost all of them form metal chlorides, and then the acid-washed quartz sand is cleaned with pure water, which can be dissolved in aqueous solution and discharged in the form of wastewater, which is easier to neutralize and reduce environmental pollution.

[0028] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0029] The above describes the embodiments, which is not limited, and the drawings shown are only one of the embodiments, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired, without departing from the creative purpose, without creative design, similar structure and examples of the technical solution can be designed, which shall belong to the protection scope.

Claims

1. A continuous quartz sand acid leaching apparatus, characterized by, The utility model relates to a quartz sand surface impurity removal device, including: A pre-polishing part (1) includes a transverse polishing cylinder (4), the transverse polishing cylinder (4) is provided with extrusion grinding stick (5) inside, the transverse polishing cylinder (4) inner wall is fixedly connected with multiple conveying fins (6) that are evenly distributed along its inner wall, the extrusion grinding stick (5) is located in the center of transverse polishing cylinder (4) inside lower place, and the extrusion grinding stick (5) bottom and conveying fin (6) between form extrusion polishing area (7); An acid leaching assembly (2) includes a transverse stirring cylinder (8), the transverse stirring cylinder (8) inner wall is fixedly connected with several evenly distributed stirring conveying fins (9), and acid leaching channel (10) is formed between adjacent stirring conveying fins (9). Wherein, the pre-polishing part (1) and acid leaching assembly (2) between being provided with material transfer mechanism (3), material transfer mechanism (3) is configured to remove the quartz sand that surface covering impurity is polished in transverse polishing cylinder (4) and is transferred to transverse stirring cylinder (8) inside.

2. The continuous quartz sand acid leaching apparatus according to claim 1, characterized in that, The transverse polishing cylinder (4) is provided with a first mounting rack (11) outside, the transverse stirring cylinder (8) is provided with a second mounting rack (12) outside, and the two ends of the transverse polishing cylinder (4) are rotatably connected to the two ends of the interior of the first mounting rack (11), respectively. The two ends of the transverse stirring cylinder (8) are rotatably connected to the two ends of the interior of the second mounting rack (12), respectively.

3. The continuous quartz sand acid leaching apparatus according to claim 2, characterized in that, The extrusion grinding stick (5) is distributed along the axial direction of the rotating shaft of the transverse polishing cylinder (4), and the two ends of the extrusion grinding stick (5) are fixedly connected with mounting rods (13). The mounting rods (13) are connected to the other end of the extrusion grinding stick (5) and the first mounting rack (11). The interior of the transverse polishing cylinder (4) and the mounting rods (13) form a material dispersion area (14).

4. The continuous quartz sand acid leaching apparatus according to claim 2, characterized in that, The first mounting rack (11) and the second mounting rack (12) are provided with a feeding pipe (15) on one side of the exterior, and the other side of the exterior of the first mounting rack (11) and the second mounting rack (12) is provided with a discharging pipe (16).

5. The continuous quartz sand acid leaching apparatus according to claim 1, characterized in that, The transverse polishing cylinder (4) is provided with a hydrochloric acid drip irrigation pipeline (17) inside, and the two ends of the hydrochloric acid drip irrigation pipeline (17) extend from the two ends of the first mounting rack (11) to the outside of the transverse polishing cylinder (4). The bottom of the hydrochloric acid drip irrigation pipeline (17) delivers hydrochloric acid to the interior of the transverse polishing cylinder (4).

6. The continuous quartz sand acid leaching apparatus according to claim 1 or 5, characterized in that, A waste acid treatment part (18) is provided outside the first mounting rack (11), and the material transfer mechanism (3) and the waste acid treatment part (18) are connected by a first reflux pipe (19). The transverse stirring cylinder (8) and the waste acid treatment part (18) are connected by a second reflux pipe (20), and the waste acid treatment part (18) and the hydrochloric acid drip irrigation pipeline (17) are connected by a third reflux pipe (21).

7. The continuous quartz sand acid leaching apparatus according to claim 2, characterized in that, The transverse polishing cylinder (4) and the transverse stirring cylinder (8) are provided with a driven gear ring (22) outside, and the teeth of the driven gear ring (22) face outward. The transverse polishing cylinder (4) and the transverse stirring cylinder (8) are driven to rotate by a driving assembly provided on the mounting rack.

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