Precious metal smelting raw material granularity detection device
By employing a composite sieve structure and the synergistic effect of multiple physical fields in the particle size detection device for precious metal smelting raw materials, the problem of long-diameter particles bridging in the screening device was solved, thereby improving the accuracy and efficiency of particle size classification.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- KUNMING DIANBO HUITONG TECHNOLOGY CO LTD
- Filing Date
- 2026-03-23
- Publication Date
- 2026-04-28
AI Technical Summary
The presence of particles with large aspect ratios in the raw materials for precious metal smelting causes these particles to bridge in the screening device due to orientation effects, resulting in distorted particle size classification results and particle coarsening problems.
The screening device, which adopts a composite sieve structure, combines liquid medium, vortex mechanism and ultrasonic disperser. Through the synergistic effect of multiple physical fields such as fluid torque and centrifugal force, it actively controls the particle posture so that the particles pass through the sieve holes with the minimum cross-sectional direction.
It significantly improves the accuracy and efficiency of particle size classification, reduces screening errors caused by orientation effects, and ensures the stability and efficiency of the precious metal smelting process.
Smart Images
Figure CN121933402A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of new material testing and measurement technology, and specifically relates to a particle size detection device for precious metal smelting raw materials. Background Technology
[0002] In the testing and measurement of new materials, the particle size distribution of raw materials is one of the key process parameters affecting smelting efficiency, reaction uniformity, and the final precious metal recovery rate. To ensure the stability and efficiency of the smelting process, strict particle size testing and grading control of the raw materials before they enter the furnace are usually required.
[0003] Currently, the industry widely uses vibrating sieving or laser particle size analysis to detect the particle size of raw materials for precious metal smelting. Among them, vibrating sieving uses screens with different aperture sizes to separate materials step by step according to particle size: particles smaller than the screen aperture size pass through the screen and enter the next stage, while particles larger than the screen aperture size are trapped in the current screen layer.
[0004] However, because some raw materials for precious metal smelting contain particles with a large aspect ratio, i.e., particles with a plate-like, needle-like, or fibrous structure, these particles are very prone to bridging the sieve holes in the sieving particle size analyzer due to the orientation effect. In other words, although the actual minimum cross-section of the particles is smaller than the sieve hole size, they cannot pass through the sieve smoothly due to their geometric orientation. As a result, the material that should be classified as fine particles is mistakenly trapped in the coarse particles, causing the particle size classification results to be distorted, resulting in the so-called particle coarsening problem. Summary of the Invention
[0005] In order to solve the above-mentioned problems in the prior art, namely, that some particles with large aspect ratios in precious metal smelting raw materials are prone to "bridging" on the sieve holes of the sieving particle size detection device in a lateral posture due to the orientation effect, the present invention provides a particle size detection device for precious metal smelting raw materials.
[0006] The system includes a screening mechanism, a flow guiding mechanism, and a liquid medium. The screening mechanism includes a vertically arranged screening chamber and multiple grading screens. The multiple grading screens are arranged parallel to each other and spaced apart from top to bottom along the vertical direction of the screening chamber, and the particle size they can retain for raw materials decreases progressively from top to bottom, thereby dividing the screening chamber into multiple vertically connected grading chambers. The outlet of the flow guiding mechanism is connected to the top of the screening chamber and is configured to drive the liquid medium to carry the raw material particles from top to bottom through the multiple grading screens, so that the raw material particles are dispersed under the action of the liquid flow and tend to pass through the grading screens with their smallest cross-sectional direction that matches their particle size.
[0007] Furthermore, at least one of the grading screens has a conical structure, and its screen holes have a composite screen hole structure, the composite screen hole structure including: a honeycomb hexagonal base grid for coarse screening and flow guidance; elliptical screen holes for fine screening nested within the hexagonal units; the hexagonal units are arranged along an equiangular spiral, and the major axis direction of the elliptical screen holes forms an acute angle with the tangent direction of the spiral.
[0008] Furthermore, the screening mechanism also includes a vortex mechanism; the vortex mechanism is configured to apply a tangential driving force to the liquid medium entering the screening chamber, so as to cooperate with the flow guiding mechanism to form a downward spiral flow in the screening chamber, so that the raw material particles pass through the sieve holes of the grading screen that match their particle size under the combined action of centrifugal force and liquid flow drag.
[0009] Furthermore, the screening mechanism includes multiple grading structures, an upper end cover, and a lower end cover; the grading structure includes the grading screen and a support cylinder; the grading screen is detachably installed inside the support cylinder; multiple support cylinders are connected end to end in a vertical direction to form a continuous cylindrical body, the upper end of the cylindrical body is connected to the upper end cover, and the lower end is connected to the lower end cover, together forming the screening chamber.
[0010] Furthermore, the grading structure also includes an ultrasonic disperser; the ultrasonic disperser is installed on the side wall of the bearing cylinder, and its ultrasonic probe extends into the screening chamber to apply ultrasonic vibration to the liquid medium during the screening process, so as to promote the dispersion of the raw material particles and assist the raw material particles to pass through the sieve holes of the grading screen that match their particle size in the direction of minimum cross-section.
[0011] Furthermore, the flow guiding mechanism includes a circulation pipe and a circulation pump; one end of the circulation pipe is connected to the upper end cover, and the other end is connected to the outlet of the circulation pump; the inlet of the circulation pump is connected to the lower end cover, for driving the liquid medium to circulate sequentially along the circulation pump, the circulation pipe and the screening chamber.
[0012] Furthermore, the flow guiding mechanism also includes a cleaning structure; the cleaning structure includes a first three-way valve and a second three-way valve; both the first three-way valve and the second three-way valve are connected in series in the circulation pipe, wherein the first three-way valve is located in the upper pipe section near the upper end cover, and the second three-way valve is located in the lower pipe section near the lower end cover; the cleaning structure has a cleaning mode and a drying mode; in the cleaning mode, the cleaning liquid flows sequentially through the first three-way valve, the upper pipe section of the circulation pipe, the screening chamber, the circulation pump, the lower pipe section of the circulation pipe, and the second three-way valve to peel off and discharge the liquid phase medium remaining on the surface of the raw material particles; in the drying mode, high-temperature protective gas flows sequentially through the first three-way valve, the upper pipe section of the circulation pipe, the screening chamber, the circulation pump, the lower pipe section of the circulation pipe, and the second three-way valve to purge and dry the raw material particles in the screening chamber.
[0013] Furthermore, it also includes an angle adjustment mechanism; the grading structure also includes a discharge valve; the inlet of the discharge valve is connected to the bearing cylinder; the angle adjustment mechanism is configured to drive the screening mechanism to tilt toward the side where the discharge valve is located, so that the raw material particles in the grading chamber are discharged through the discharge valve.
[0014] Furthermore, the grading structure also includes a vibration motor; the vibration motor is connected to the side wall of the bearing cylinder and is used to apply reciprocating vibration to the grading screen to cause the raw material particles stuck on the grading screen to detach and move towards the discharge valve.
[0015] Furthermore, the angle adjustment mechanism includes an overhead support, a bearing base, and a drive push rod; one end of the overhead support is connected to the bearing base, and the other end is rotatably mounted on the screening mechanism; one end of the drive push rod is hinged to the bearing base, and the other end is hinged to the screening mechanism, for driving the screening mechanism to rotate through telescopic movement.
[0016] The beneficial effects of this invention are:
[0017] This scheme constructs a composite sieve structure, which actively guides and enhances the attitude adjustment of particles in flow through the design of the sieve structure:
[0018] 1. The honeycomb hexagonal frame provides structural stability and uniform flow guidance; the minor axis of the internal elliptical sieve holes defines the nominal size of the sieve. In the fluid, when non-spherical particles flow through the elliptical holes, the fluid torque they experience causes their major axis to tend to align with the major axis of the hole, thus increasing the probability of passing through the sieve holes with the minor axis direction (i.e., the smallest cross-section).
[0019] 2. The aforementioned composite sieve units are arranged in a matrix along an equiangular spiral, with the major axis of the ellipse forming an acute angle with the tangent to the spiral. In the spiral flow field, particles are subjected not only to a downward axial drag but also to tangential velocity and centrifugal force, moving along a spiral trajectory. When a particle reaches the sieve surface, the spirally arranged sieve array matches the particle's spiral motion path, significantly increasing the probability of contact and effective contact time between the particle and the matching sieve aperture. Simultaneously, the angle between the major axis of the ellipse and the tangent to the flow field further applies a directional torque.
[0020] 3. This structure, combined with ultrasonic dispersion and liquid-phase chemical dispersion, forms a multi-physics synergy. The liquid-phase medium and ultrasound first disrupt the agglomeration forces between particles, allowing them to enter the flow field as single particles. Subsequently, under the action of the spiral flow field, the particles are transported to the sieve array region with specific geometric features. Here, fluid forces, including drag, centrifugal force, torque, and sieve geometric constraint forces, work together to achieve active attitude-controlled sieving. Attached Figure Description
[0021] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0022] Figure 1 This is a schematic diagram of the structure of the particle size detection device for precious metal smelting raw materials provided in the embodiments of the present invention;
[0023] Figure 2 This is a right view of the particle size detection device for precious metal smelting raw materials provided in an embodiment of the present invention;
[0024] Figure 3 This is a schematic diagram of the screening mechanism provided in an embodiment of the present invention;
[0025] Figure 4 This is a schematic diagram of the combined structure of the hierarchical structure and the eddy current mechanism provided in the embodiments of the present invention;
[0026] Figure 5 This is a schematic diagram of the structure of the grading screen provided in an embodiment of the present invention;
[0027] Figure 6 This is a schematic diagram of the eddy current mechanism provided in an embodiment of the present invention;
[0028] Figure 7 This is a schematic diagram of the flow guiding mechanism provided in an embodiment of the present invention;
[0029] Figure 8 This is a schematic diagram of the angle adjustment mechanism provided in an embodiment of the present invention.
[0030] icon:
[0031] 100. Screening mechanism; 110. Grading structure; 111. Grading screen; 112. Bearing cylinder; 113. Ultrasonic disperser; 114. Discharge valve; 115. Vibrating motor; 120. Upper end cover; 130. Lower end cover; 140. Vortex mechanism; 141. Inclined flushing pipe; 142. Parallel pipe; 143. Vortex pump; 150. Feed pipe; 160. Drain pipe; 200. Flow guiding mechanism; 210. Circulation pipe; 220. Circulation pump; 230. Cleaning structure; 231. First three-way valve; 232. Second three-way valve; 300. Angle adjustment mechanism; 310. Overhead support; 320. Bearing base; 330. Drive push rod. Detailed Implementation
[0032] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.
[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0034] The present invention provides a particle size detection device for precious metal smelting raw materials, including a screening mechanism 100, a flow guiding mechanism 200 and a liquid medium.
[0035] The following combination Figures 1-8 The structure and shape of the particle size detection device for precious metal smelting raw materials are described in detail:
[0036] The screening mechanism 100 includes a vertically arranged screening chamber and multiple grading screens 111. The multiple grading screens 111 are arranged parallel to each other and spaced apart from top to bottom along the vertical direction of the screening chamber, and the particle size of the raw material particles they can retain decreases from top to bottom, so as to divide the screening chamber into multiple vertically connected grading chambers. The outlet of the flow guiding mechanism 200 is connected to the top of the screening chamber and is configured to drive the liquid medium to carry the raw material particles from top to bottom through the multiple grading screens 111, so that the raw material particles are dispersed under the action of the liquid flow and tend to pass through the grading screens 111 that match their particle size in the direction of their smallest cross section.
[0037] In this embodiment, the flow guiding mechanism 200 drives the liquid medium to flow from top to bottom in the screening chamber, so as to form a unidirectional liquid flow from top to bottom in the screening chamber. The unidirectional liquid flow carries the raw material particles from top to bottom through multiple classifying screens 111. During this process, the raw material particles will be subjected to fluid torque in the unidirectional liquid flow, causing them to rotate and tend to the posture of least resistance, that is, the long axis is parallel to the streamline while the minimum cross section is perpendicular to the classifying screen 111. This phenomenon is called orientation alignment effect in microfluidics, which makes the raw material particles tend to pass through the screen holes of the classifying screen 111 with their minimum cross section direction.
[0038] In addition, by arranging multiple grading screens 111 parallel to each other and spaced apart from top to bottom along the vertical direction of the sieving chamber, and by gradually decreasing the screen aperture from top to bottom, the raw material particles in the liquid medium are separated by the grading screens 111 that match their particle size, thereby retaining the raw material particles in the corresponding grading chamber according to their particle size.
[0039] The shape and structure of the grading screen 111 are as follows:
[0040] like Figure 5 As shown, at least one grading screen 111 has a conical structure and its screen holes are a composite screen hole structure. The composite screen hole structure includes: a honeycomb hexagonal base grid for coarse screening and flow guidance; elliptical screen holes for fine screening nested in hexagonal units; the hexagonal units are arranged along an equiangular spiral, and the major axis of the elliptical screen holes forms an acute angle with the tangent of the spiral.
[0041] In this embodiment, the honeycomb hexagonal frame provides structural stability and uniform flow guidance; the minor axis of the internal elliptical sieve holes defines the nominal size of the sieve. In the fluid, when non-spherical particles flow through the elliptical holes, the fluid torque they experience causes their major axis to tend to align with the major axis direction of the holes, thus increasing the probability of passing through the sieve holes with the minor axis direction (i.e., the smallest cross-section).
[0042] Furthermore, the aforementioned composite sieve units are arranged in a matrix along an equiangular helix, with the major axis of the ellipse forming an acute angle with the tangent to the helix. In the helical flow field, particles are subjected not only to a downward axial drag but also to tangential velocity and centrifugal force, moving along a helical trajectory. When a particle reaches the sieve surface, the helical array of sieve holes matches the particle's helical motion path, significantly increasing the probability of contact and effective contact time between the particle and the matching sieve apertures. Simultaneously, the angle between the major axis of the ellipse and the tangent to the flow field further applies a directional torque.
[0043] To drive the raw material particles through the classifying screen 111:
[0044] like Figure 3 and Figure 5As shown, it also includes a vortex mechanism 140; the vortex mechanism 140 is configured to apply a tangential driving force to the liquid medium entering the screening chamber, so as to cooperate with the flow guiding mechanism 200 to form a spiral flow from top to bottom in the screening chamber, so that the raw material particles pass through the sieve holes of the grading screen 111 that matches their particle size under the combined action of centrifugal force and liquid flow drag.
[0045] In this embodiment, the vortex mechanism 140 applies a tangential driving force to the liquid medium in the screening chamber. During this process, the flow guiding mechanism 200 simultaneously drives the liquid medium in the screening chamber to flow from top to bottom, forming a spiral vortex from top to bottom in the flow channel space.
[0046] The shape and structure of the eddy current mechanism 140 are as follows:
[0047] like Figure 4 and Figure 6 As shown, the vortex mechanism 140 includes multiple inclined flushing pipes 141, parallel pipes 142, and a vortex pump 143. The outlets of the multiple inclined flushing pipes 141 are all connected to the screening chamber, and their inlets are connected to the outlets of the parallel pipes 142, and they are arranged in a circumferential array around the axis of the screening chamber. The inlet of the vortex pump 143 is connected to the screening chamber, and its outlet is connected to the inlet of the parallel pipes 142, so as to drive the liquid phase medium in the screening chamber to flow back into the screening chamber in sequence through the vortex pump 143, the parallel pipes 142, and the inclined flushing pipes 141, thereby applying a tangential driving force to the liquid phase medium entering the screening chamber.
[0048] In this embodiment, the vortex pump 143 drives the liquid medium in the screening chamber to enter the inclined flushing pipe 141 through the parallel pipe 142. The liquid medium in the inclined flushing pipe 141 flows back into the screening chamber in an inclined state. During this process, the inclined liquid flow applies a tangential driving force to the liquid medium in the screening chamber.
[0049] To flexibly combine different aperture sieves 111 according to the particle size range of the raw material:
[0050] like Figures 3-4 As shown, the screening mechanism 100 includes multiple grading structures 110, an upper end cover 120, and a lower end cover 130; the grading structure 110 includes a grading screen 111 and a support cylinder 112; the grading screen 111 is detachably installed inside the support cylinder 112; multiple support cylinders 112 are connected end to end in a vertical direction to form a continuous cylindrical body, the upper end of the cylindrical body is connected to the upper end cover 120, and the lower end is connected to the lower end cover 130, together forming a screening chamber.
[0051] In order to feed raw material particles into the screening chamber:
[0052] like Figure 3 As shown, the screening mechanism 100 also includes a feed pipe 150; the outlet of the feed pipe 150 is connected to the upper end cover 120 and is used to input raw material particles into the screening chamber.
[0053] In order to drain the liquid medium from the screening chamber:
[0054] like Figure 3 As shown, the screening mechanism 100 also includes a drain pipe 160; the outlet of the drain pipe 160 is connected to the lower end cover 130 and is used to discharge the liquid phase medium in the screening chamber.
[0055] In this embodiment, based on the expected particle size distribution of the raw material particles to be tested, a set of grading screens 111 with decreasing apertures are pre-selected. Then, the grading screens 111 are installed into the corresponding carrier cylinders 112. Next, the carrier cylinders 112 are stacked and assembled into a cylindrical body in order from top to bottom according to the aperture of the grading screens 111 from largest to smallest. Then, the upper end cap 120 and the lower end cap 130 are assembled to the upper and lower ends of the cylindrical body, respectively. Thus, grading screens 111 with different apertures can be flexibly combined according to the particle size range of the raw material particles.
[0056] When the expected particle size distribution of the raw material changes, it is only necessary to disassemble the corresponding support cylinder 112 and replace the grading screen 111 inside the support cylinder 112 to adapt to the new particle size detection requirements.
[0057] To promote the dispersion of raw material particles and to assist the raw material particles in passing through the sieve openings of the grading sieve 111, which matches their particle size, in the direction of minimum cross-section:
[0058] like Figure 4 As shown, the grading structure 110 also includes an ultrasonic disperser 113; the ultrasonic disperser 113 is installed on the side wall of the bearing cylinder 112, and its ultrasonic probe extends into the sieving chamber to apply ultrasonic vibration to the liquid medium during the sieving process, so as to promote the dispersion of raw material particles and assist the raw material particles to pass through the sieve holes of the grading screen 111 that matches its particle size in the direction of minimum cross section.
[0059] In this embodiment, the ultrasonic disperser 113 applies high-frequency ultrasonic vibration to the liquid medium to generate a strong cavitation effect in the sieving chamber. The cavitation bubbles are periodically generated and violently collapsed under the action of the sound field to generate instantaneous high-speed microjets. The microjets can effectively destroy the van der Waals forces, electrostatic forces or liquid bridge forces between raw material particles, so that the agglomerates can be rapidly disintegrated into single particles.
[0060] Under the synergistic effect of ultrasonic flow field and unidirectional liquid flow, the raw material particles in the liquid medium will be subjected to the coupled torque of fluid shear force and acoustic radiation force, so as to gradually adjust the spatial orientation of the raw material particles, thereby making the long axis of the raw material particles tend to be parallel to the liquid flow direction, so that the raw material particles pass through the sieve holes of the corresponding aperture with the true minimum particle size, thereby significantly reducing the "lateral bridging" phenomenon caused by random orientation.
[0061] In addition, ultrasonic vibration drives the raw material particles to generate high-frequency micro-amplitude jumping or shaking effect on the surface of the grading screen 111, so as to weaken the adhesion between the raw material particles and the grading screen 111 and help the stuck raw material particles to pass through the grading screen 111, thereby improving screening efficiency and particle size classification accuracy.
[0062] To disperse agglomerated raw material particles while avoiding excessive breakage of already deagglomerated raw material particles:
[0063] like Figure 3 As shown, the output power of multiple ultrasonic dispersers 113 decreases sequentially from top to bottom, and their ultrasonic probes extend into the corresponding grading chambers, which are used to disperse agglomerated raw material particles while reducing the risk of excessive breakage of deagglomerated raw material particles.
[0064] In this embodiment, by setting the output power of multiple ultrasonic dispersers 113 to decrease sequentially from top to bottom, and having their ultrasonic probes extend into the corresponding grading chambers respectively, an ultrasonic zone with a sequentially decreasing range is formed in the sieving chamber from top to bottom, thereby dispersing agglomerated raw material particles while avoiding excessive crushing of the deagglomerated raw material particles.
[0065] To drive the liquid medium to flow vertically downwards along the screening chamber:
[0066] like Figure 7 As shown, the flow guiding mechanism 200 includes a circulation pipe 210 and a circulation pump 220; one end of the circulation pipe 210 is connected to the upper end cover 120, and the other end is connected to the outlet of the circulation pump 220; the inlet of the circulation pump 220 is connected to the lower end cover 130, and is used to drive the liquid medium to circulate sequentially along the circulation pump 220, the circulation pipe 210 and the screening chamber.
[0067] To control the discharge of the liquid medium from the screening chamber:
[0068] The drain pipe has a closed mode and an open mode. In the closed mode, the outlet of the drain pipe is closed to prevent the liquid medium in the screening chamber from being discharged. In the open mode, the outlet of the drain pipe is open to allow the liquid medium in the screening chamber to be discharged through the drain pipe under the action of gravity.
[0069] In this embodiment, the circulating pump 220 drives the liquid medium at the bottom of the screening chamber into the circulating pipe 210. The circulating pipe 210 guides the liquid medium to re-enter the screening chamber from the top. As the liquid medium at the bottom of the screening chamber flows back from the top of the screening chamber through the circulating pump 220 and the circulating pipe 210, the liquid medium is driven to flow vertically downward along the screening chamber.
[0070] To remove residual liquid media and raw material particles exceeding the lower screening limit from the surface of raw material particles:
[0071] like Figure 7 As shown, the flow guiding mechanism 200 also includes a cleaning structure 230; the cleaning structure 230 includes a first three-way valve 231 and a second three-way valve 232; both the first three-way valve 231 and the second three-way valve 232 are connected in series in the circulation pipe 210, wherein the first three-way valve 231 is located in the upper pipe section near the upper end cover 120, and the second three-way valve 232 is located in the lower pipe section near the lower end cover 130. The cleaning structure 230 has a cleaning mode and a drying mode; in the cleaning mode, the cleaning fluid flows sequentially through The first three-way valve 231, the upper section of the circulation pipe 210, the screening chamber, the circulation pump 220, the lower section of the circulation pipe 210, and the second three-way valve 232 are used to strip and discharge the liquid medium remaining on the surface of the raw material particles. In the air-drying mode, high-temperature protective gas flows sequentially through the first three-way valve 231, the upper section of the circulation pipe 210, the screening chamber, the circulation pump 220, the lower section of the circulation pipe 210, and the second three-way valve 232 to purge and dry the raw material particles in the screening chamber.
[0072] In this embodiment, after the liquid medium in the screening chamber is discharged, the cleaning structure 230 switches to cleaning mode. That is, the first three-way valve 231 controls the upper section of the circulation pipe 210 to connect with the cleaning water source, while the second three-way valve 232 controls the lower section of the circulation pipe 210 to connect with the external sewage discharge pipe. The cleaning liquid output from the cleaning water source flows sequentially through the first three-way valve 231, the upper section of the circulation pipe 210, the screening chamber, the circulation pump 220, the lower section of the circulation pipe 210, and the second three-way valve 232 into the external sewage discharge pipe. During this process, the cleaning liquid flows from top to bottom in the screening chamber to peel off and discharge the liquid medium remaining on the surface of the raw material particles and the raw material particles exceeding the lower screening limit.
[0073] After the raw material particles are cleaned, the cleaning structure 230 switches from cleaning mode to air drying mode. That is, the first three-way valve 231 controls the upper section of the circulation pipe 210 to connect with the high-temperature gas source, while the second three-way valve 232 controls the lower section of the circulation pipe 210 to connect with the external exhaust pipe. The high-temperature protective gas output from the high-temperature gas source flows sequentially through the first three-way valve 231, the upper section of the circulation pipe 210, the screening chamber, the circulation pump 220, the lower section of the circulation pipe 210, and the second three-way valve 232 and the internal and external exhaust pipes. During this process, the high-temperature protective gas flows from top to bottom in the screening chamber to purge and dry the raw material particles in the screening chamber.
[0074] In order to discharge the raw material particles from the classifying chamber:
[0075] like Figure 1 , Figure 2 and Figure 4As shown, it also includes an angle adjustment mechanism 300; the grading structure 110 also includes a discharge valve 114; the inlet of the discharge valve 114 is connected to the bearing cylinder 112; the angle adjustment mechanism 300 is configured to drive the screening mechanism 100 to tilt toward the side where the discharge valve 114 is located, so that the raw material particles in the grading chamber are discharged through the discharge valve 114.
[0076] In this embodiment, the angle adjustment mechanism 300 drives the screening mechanism 100 to tilt toward the side where the discharge valve 114 is located, so that the grading screen 111 in the horizontal state is tilted. Under the guidance of the weight and the grading screen 111, the raw material particles move toward the side where the discharge valve 114 is located, and the moving raw material particles are discharged through the discharge valve 114.
[0077] To prevent raw materials from sticking to the surface of the grading screen 111 or the inner wall of the bearing cylinder 112:
[0078] like Figure 4 As shown, the grading structure 110 also includes a vibration motor 115; the vibration motor 115 is connected to the side wall of the bearing cylinder 112 and is used to apply reciprocating vibration to the grading screen 111 to cause the raw material particles stuck on the grading screen 111 to detach and move towards the discharge valve 114.
[0079] In this embodiment, during the discharge of raw material particles, the vibrating motor 115 applies reciprocating vibration to the bearing cylinder 112. Under the action of vibration stress, the raw material particles on the inner wall of the bearing cylinder 112 peel off and move towards the discharge valve 114. At the same time, the bearing cylinder 112 transmits reciprocating vibration to the grading screen 111, so that the raw material particles on the surface of the grading screen 111 or stuck in the screen holes of the grading screen 111 peel off and move towards the discharge valve 114, thereby avoiding the raw material from sticking to the surface of the grading screen 111 or the inner wall of the bearing cylinder 112.
[0080] In order to drive the screening mechanism 100 to tilt toward the side where the discharge valve 114 is located:
[0081] like Figure 8 As shown, the angle adjustment mechanism 300 includes an overhead support 310, a bearing base 320, and a drive push rod 330; one end of the overhead support 310 is connected to the bearing base 320, and the other end is rotatably connected to the screening mechanism 100; one end of the drive push rod 330 is hinged to the bearing base 320, and the other end is hinged to the screening mechanism 100, for driving the screening mechanism 100 to rotate through telescopic movement.
[0082] In this embodiment, the drive push rod 330 drives the screening mechanism 100 to rotate by extension and retraction, thereby driving the screening mechanism 100 to tilt or reset towards the side where the discharge valve 114 is located, and locking the screening mechanism 100 after reset or tilt.
[0083] The terms “first”, “second”, etc., are used to distinguish similar objects, not to describe or indicate a specific order or sequence.
[0084] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.
[0085] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.
Claims
1. A particle size detection device for precious metal smelting raw materials, characterized in that: It includes a screening mechanism (100), a flow guiding mechanism (200), and a liquid medium; The screening mechanism (100) includes a vertically arranged screening chamber and multiple grading screens (111). Multiple grading screens (111) are arranged parallel to each other from top to bottom and spaced apart along the vertical direction of the screening chamber, and the particle size of the raw material particles they retain decreases from top to bottom, so as to divide the screening chamber into multiple grading chambers that are connected vertically. The outlet of the flow guiding mechanism (200) is connected to the top of the screening chamber and is configured to drive the liquid medium to carry the raw material particles from top to bottom through a plurality of the grading screens (111), so that the raw material particles are dispersed under the action of the liquid flow and tend to pass through the grading screens (111) that match their particle size in the direction of their minimum cross section.
2. The particle size detection device for precious metal smelting raw materials according to claim 1, characterized in that: At least one of the grading screens (111) has a conical structure, and its screen holes have a composite screen hole structure, the composite screen hole structure comprising: Honeycomb hexagonal base grid for coarse screening and flow guidance; Elliptical sieve openings for fine screening nested within the hexagonal unit; The hexagonal units are arranged along an equal-angled spiral, and the major axis of the elliptical sieve holes forms an acute angle with the tangent of the spiral.
3. The particle size detection device for precious metal smelting raw materials according to claim 2, characterized in that: The screening mechanism (100) also includes a vortex mechanism (140). The vortex mechanism (140) is configured to apply a tangential driving force to the liquid medium entering the screening chamber, so as to cooperate with the flow guiding mechanism (200) to form a spiral flow from top to bottom in the screening chamber, so that the raw material particles pass through the sieve holes of the grading screen (111) that match their particle size under the combined action of centrifugal force and liquid flow drag.
4. The particle size detection device for precious metal smelting raw materials according to claim 3, characterized in that: The screening mechanism (100) includes multiple grading structures (110), an upper end cover (120), and a lower end cover (130). The grading structure (110) includes the grading screen (111) and the support cylinder (112). The grading screen (111) is detachably installed inside the bearing cylinder (112); Multiple bearing cylinders (112) are connected end to end in a vertical direction to form a continuous cylindrical body. The upper end of the cylindrical body is connected to the upper end cover (120), and the lower end is connected to the lower end cover (130), together forming the screening chamber.
5. The particle size detection device for precious metal smelting raw materials according to claim 4, characterized in that: The hierarchical structure (110) also includes an ultrasonic diffuser (113). The ultrasonic disperser (113) is installed on the side wall of the bearing cylinder (112), and its ultrasonic probe extends into the screening chamber to apply ultrasonic vibration to the liquid medium during the screening process, so as to promote the dispersion of the raw material particles and assist the raw material particles to pass through the sieve holes of the grading screen (111) that matches its particle size in the direction of minimum cross section.
6. The particle size detection device for precious metal smelting raw materials according to claim 5, characterized in that: The flow guiding mechanism (200) includes a circulation pipe (210) and a circulation pump (220); One end of the circulation pipe (210) is connected to the upper end cap (120), and the other end is connected to the outlet of the circulation pump (220); The inlet of the circulating pump (220) is connected to the lower end cover (130) and is used to drive the liquid medium to circulate sequentially along the circulating pump (220), the circulating pipe (210) and the screening chamber.
7. The particle size detection device for precious metal smelting raw materials according to claim 6, characterized in that: The flow guiding mechanism (200) also includes a cleaning structure (230); The cleaning structure (230) includes a first three-way valve (231) and a second three-way valve (232); The first three-way valve (231) and the second three-way valve (232) are both connected in series in the circulation pipe (210), wherein the first three-way valve (231) is located in the upper pipe section near the upper end cover (120), and the second three-way valve (232) is located in the lower pipe section near the lower end cover (130); The cleaning structure (230) has a cleaning mode and a drying mode; In the cleaning mode, the cleaning fluid flows sequentially through the first three-way valve (231), the upper section of the circulation pipe (210), the screening chamber, the circulation pump (220), the lower section of the circulation pipe (210), and the second three-way valve (232) to peel off and discharge the liquid medium remaining on the surface of the raw material particles; In the air-drying mode, high-temperature protective gas flows sequentially through the first three-way valve (231), the upper pipe section of the circulation pipe (210), the screening chamber, the circulation pump (220), the lower pipe section of the circulation pipe (210), and the second three-way valve (232) to purge and dry the raw material particles in the screening chamber.
8. The particle size detection device for precious metal smelting raw materials according to claim 7, characterized in that: It also includes an angle adjustment mechanism (300); The graded structure (110) also includes a discharge valve (114). The inlet of the discharge valve (114) is connected to the bearing cylinder (112). The angle adjustment mechanism (300) is configured to drive the screening mechanism (100) to tilt toward the side where the discharge valve (114) is located, so that the raw material particles in the grading chamber are discharged through the discharge valve (114).
9. The particle size detection device for precious metal smelting raw materials according to claim 8, characterized in that: The hierarchical structure (110) also includes a vibration motor (115). The vibration motor (115) is connected to the side wall of the bearing cylinder (112) and is used to apply reciprocating vibration to the grading screen (111) to cause the raw material particles stuck on the grading screen (111) to detach and move towards the discharge valve (114).
10. The particle size detection device for precious metal smelting raw materials according to claim 9, characterized in that: The angle adjustment mechanism (300) includes an overhead support (310), a bearing base (320), and a drive push rod (330). One end of the overhead support (310) is connected to the bearing base (320), and the other end is rotatably mounted on the screening mechanism (100). One end of the drive push rod (330) is hinged to the bearing base (320), and the other end is hinged to the screening mechanism (100), for driving the screening mechanism (100) to rotate through telescopic movement.