Mineral particle size meter adaptive to multiple concentration conditions

Abstract

The application relates to the technical field of ore pulp granularity measurement, in particular to a mineral granularity meter suitable for multiple concentration conditions, which comprises first and second contacts arranged oppositely, the first contact has the freedom of linear reciprocating displacement towards the second contact, and the two together constitute a detection probe for clamping ore pulp particles; the overlapping area of the first and second contacts in the linear reciprocating displacement direction is adjusted based on the ore pulp concentration. The device can adaptively adjust the overlapping area of the sampling area according to the ore pulp concentration, avoid excessive collection of large particles under high concentration, and ensure sufficient and representative sampling samples under low concentration. The application effectively improves the sampling representativeness, and in turn effectively reduces the detection error, and has the advantages of wide adaptation range, high detection precision and the like.

Description

Technical Field

[0001] This application relates to the field of slurry particle size measurement technology, and in particular to a mineral particle size meter adapted to multiple concentration conditions. Background Technology

[0002] Particle size analyzers are core precision instruments for detecting the particle size and analyzing the particle size distribution of particulate materials. They are indispensable in many industrial scenarios such as mineral processing, metallurgical powder processing, chemical particle preparation, and new material research and development. Currently, the mainstream mechanical gripper-type particle size analyzers in the industry use a ceramic disc of fixed size to press and clamp the mineral particles inside the slurry. By repeatedly gripping and sampling and statistically analyzing the sampled particle data, the overall particle size distribution parameters of the slurry are estimated.

[0003] Currently, devices used for particle size analysis of particulate materials in the industrial field are mainly divided into two categories. The first is the sieving-type particle size analyzer, which uses sieves with different apertures to classify and screen particulate materials, and then analyzes the particle size distribution by calculating the proportion of particles retained by each sieve. The second is the mechanical gripping-type analyzer, which relies on repeated gripping and sampling by contacts, and estimates the particle size and distribution parameters by combining data from multiple samplings. Both of these methods have certain limitations in practical applications. The sieving method has a cumbersome operation process and is difficult to apply to fluid slurry systems; while traditional gripping-type devices have a fixed contact area, which can lead to sampling data deviations when the slurry concentration varies significantly, making it difficult to meet the detection needs of slurries with different concentrations.

[0004] Therefore, there is an urgent need for a mineral particle size analyzer that can be adapted to different concentration conditions in order to accurately provide the particle size and particle size distribution in the slurry. Summary of the Invention

[0005] The purpose of this application is to provide a mineral particle size analyzer that is adaptable to multiple concentration conditions, so as to solve the problems of inaccurate sampling of particle size and particle size distribution in mineral slurries of different concentrations and the distortion of detection results in the prior art.

[0006] The embodiments of this application can be implemented through the following technical solutions: A mineral particle size analyzer adapted to multiple concentration conditions includes a first contact and a second contact arranged opposite to each other. The first contact and / or the second contact have the degree of freedom to move linearly back and forth toward each other. Together, they constitute a detection probe for clamping mineral slurry particles. The overlapping area of ​​the first contact and the second contact in the straight repositioning direction can be adjusted based on the slurry concentration.

[0007] Furthermore, the overlapping area of ​​the first contact and the second contact in the straight direction of repositioning is adjusted based on the reverse matching of the slurry concentration. The higher the slurry concentration, the smaller the overlapping area, and the lower the slurry concentration, the larger the overlapping area.

[0008] Furthermore, the first contact and / or the second contact are provided with at least two different specifications and models, and the clamping surface dimensions of the first contact and / or the second contact of at least two different specifications and models are different from each other. By replacing the first contact and / or the second contact of different specifications and models, the overlapping clamping area of ​​the orthographic projection of the first contact and the second contact can be adjusted.

[0009] Furthermore, the first contact and / or the second contact have rotational displacement freedom in the plane where the clamping surface is located. By rotating the relative position of the first contact and / or the second contact, the overlapping clamping area of ​​the orthographic projection of the two contacts can be adjusted.

[0010] Furthermore, it also includes a first frame, a second frame, and a guide shaft, wherein the guide shaft is slidably connected to the first frame along its axial direction, and a first contact is connected to one end of the guide shaft along its axial direction; One end of the second frame is connected to the first frame, and the other end extends along the axial direction of the guide shaft, with the end bent and extending along the radial direction of the guide shaft. The second contact is connected to the radial extension end of the second frame and is positioned opposite to the first contact.

[0011] Furthermore, one end of the guide shaft is detachably connected to the first contact, and / or the second contact is detachably connected to the radial extension end of the second frame.

[0012] Furthermore, the second frame includes a connecting column, a connecting plate, and a locking component. The connecting column is coaxially arranged with the guide shaft. One end of the connecting column is connected to the first frame, and the other end is connected to the connecting plate through the locking component. The connecting plate is rotatably connected to the end of the connecting column and is locked in place by the locking component. The second contact is connected to the connecting plate and is arranged opposite to the first contact. The second contact adjusts the overlapping area of ​​the two contacts by rotating the connecting plate around the connecting column.

[0013] Furthermore, the first frame has coaxially arranged axial through holes at both ends, and the guide shaft passes through the two axial through holes and forms a sliding fit with the first frame.

[0014] Furthermore, it also includes a drive motor, the drive end of which is connected to a cam. The cam is eccentrically mounted on the drive shaft of the drive motor. A baffle is fixedly connected to the guide shaft in the direction of the cam and a return spring is sleeved on it. The return spring is limited between the baffle and the end face of the first frame. Under the rotation of the cam, the return spring is repeatedly compressed and elastically reset between the end face of the baffle and the end face of the first frame.

[0015] Furthermore, it also includes a sensor for detecting the linear displacement distance of the first contact and obtaining the clamping distance between the first contact and the second contact.

[0016] The embodiments of this application provide a mineral particle size analyzer adapted to multiple concentration conditions, which has at least the following beneficial effects: This application allows for adjustment of the overlapping area of ​​the first and second contacts along the linear reciprocating direction based on the slurry concentration, thus adapting to different working conditions. In high-concentration slurry environments, reducing the sampling area avoids the problem of excessive picking up of large particles; in low-concentration slurry environments, increasing the sampling area ensures sufficient sample volume and improves sample representativeness. This solution suppresses detection deviation from the sampling source, effectively improves sampling representativeness, thereby effectively reducing detection errors and improving particle size detection accuracy. It is suitable for slurry particle size detection under different working conditions and has advantages such as wide applicability and high detection accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the measurement method of an existing online particle size analyzer; Figure 2 A schematic diagram showing the fitting curves of the ideal sampled particle size distribution of slurry and the normal particle size distribution of slurry under normal operating conditions. Figure 3 A schematic diagram showing the fitting curves of the particle size distribution of high-concentration slurry samples and the normal particle size distribution of slurry under normal operating conditions. Figure 4 This is a schematic diagram of a low-concentration slurry flowing under two contacts. Figure 5 This is a schematic diagram of a high-concentration slurry flowing under two contacts. Figure 6 , Figure 7 These are schematic diagrams illustrating how changing the overlapping area of ​​the orthographic projections of two objects can be achieved by replacing contacts of different specifications. Figure 8 , Figure 9 These are schematic diagrams showing how the overlapping area of ​​the orthographic projections of the two contacts can be adjusted by rotation. Figure 10 , Figure 11 These are schematic diagrams of a mineral particle size analyzer adapted to multiple concentration conditions from different perspectives.

[0018] Numbers in the diagram 1-First contact; 2-Second contact; 3-Guide shaft; 4-Driver; 5-Cam; 6-Baffle; 7-Return spring; 8-Limiting component; 9-Sensor; S1 - First frame; S11 - Axial through hole; S2 - Second frame; S21 - Connecting column; S22 - Connecting plate; S23 - Locking component. Detailed Implementation

[0019] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0020] Furthermore, for ease of understanding, various components on the drawings have been enlarged or reduced, but this is not intended to limit the scope of protection of this application.

[0021] Singular forms of words also include plural meanings, and vice versa.

[0022] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, in the description of this application, in order to distinguish different units, the terms "first," "second," etc. are used in this specification, but these are not limited by the manufacturing order, nor should they be construed as indicating or implying relative importance. Their names may differ in the detailed description and claims of this application.

[0023] The vocabulary used in this specification is for illustrative purposes and is not intended to limit the scope of this application. It should also be noted that, unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" 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, a direct connection, or an indirect connection via an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of these terms in this application.

[0024] As shown in Figure 1, existing online slurry particle size analyzers typically use a reciprocating plunger to grip particles from a slurry suspension flowing through a channel. The particles are captured by gripping them at the plunger end face, and then the particle size is calculated using a matching detection component. The core components of the entire system include a reciprocating plunger gripping mechanism, a flow measurement channel, a particle sensor, a signal acquisition module, and a particle size data analysis terminal. During operation, the plunger continuously reciprocates up and down, and each downward press only grips solid particles within the cross-sectional area of ​​the plunger head (i.e., the measurement gripping area). Since large and small particles in the slurry are randomly distributed within the measurement channel, the capture of particles of different sizes by the plunger gripping area is a probabilistic event. By analyzing the specific gravity of particles of different sizes gripped, the particle size distribution characteristics, grinding and grading effects, and fragmentation state of the slurry after grinding can be analyzed.

[0025] To facilitate understanding, a particle size distribution curve is plotted with the particle size of the slurry on the x-axis and the percentage of distribution quantity on the y-axis, such as... Figure 2 As shown, under normal operating conditions with stable concentration, the particle size distribution within the slurry follows a standard normal distribution. Under ideal sampling conditions, the particle size distribution curve obtained by sampling with the first and second contactors can highly coincide with the original normal distribution curve of the slurry, and the detection data can accurately reproduce the particle size composition of the slurry.

[0026] However, in actual grinding production, the slurry concentration fluctuates continuously, making it difficult to maintain a constant state. Existing sampling structures with fixed clamping areas have significant drawbacks: when the slurry concentration increases, the particles within the slurry are densely packed, significantly increasing the probability of the contact point gripping large-diameter mineral particles. This results in an abnormally high weighting of the large-diameter interval in the detection curve (e.g., ...). Figure 3 The deviation between the sampling curve and the actual particle size distribution of the slurry increases sharply; for example... Figure 4 , Figure 5 As shown, under the same clamping area and flow rate, the high-concentration slurry produces significantly more large particles in the clamping surface than the low-concentration slurry. This explains why slurry concentration affects sampling results.

[0027] Therefore, regardless of whether the slurry concentration is high or low, sampling with a fixed overlapping clamping area will cause distortion in particle size calculation, resulting in large detection errors and an inability to accurately reflect the actual particle size conditions of the slurry on site. To address the shortcomings of this existing technology, this application creatively proposes an adjustable contact orthographic projection overlapping clamping area structure. By changing the size of the clamping sampling area, it adapts to the sampling needs of slurries with different concentration ranges, eliminating detection deviations caused by concentration fluctuations at the sampling source. The specific settings are as follows: like Figures 6 to 11As shown, a mineral particle size analyzer adapted to multiple concentration conditions includes a first contact 1 and a second contact 2 arranged opposite to each other. The first contact 1 and / or the second contact 2 have the degree of freedom to move back and forth in a straight line toward each other. Together, they constitute a detection probe for clamping mineral slurry particles. The overlapping area of ​​the orthographic projection of the first contact 1 and the second contact 2 in the direction of linear back and forth movement can be adjusted based on the mineral slurry concentration, so that the clamping sampling particle size distribution curves under different concentration conditions all fit the original normal distribution of the mineral slurry, eliminating the detection distortion problem caused by the fixed clamping structure from the sampling source.

[0028] In some preferred embodiments, the overlapping area of ​​the first contact 1 and the second contact 2 in the straight repositioning direction is adjusted based on the reverse matching of the slurry concentration. The higher the concentration, the smaller the overlapping area, and the lower the concentration, the larger the overlapping area. This avoids excessive grabbing of large particles in high-concentration slurry, which would cause detection distortion. It also increases the number of particles sampled in a single operation in low-concentration slurry, thus ensuring sample representativeness.

[0029] When the slurry concentration exceeds a preset threshold range, the overlapping clamping area of ​​the first contact 1 and the second contact 2 is reduced. When the slurry concentration is below the preset threshold range, the overlapping clamping area of ​​the first contact 1 and the second contact 2 is increased. By flexibly adjusting the clamping sampling area according to the slurry concentration, different working conditions can be adapted to the specific conditions: when the slurry concentration is high, the sampling area is reduced to reduce mutual interference between particles and avoid excessive collection of large particles; when the slurry concentration is low, the sampling area is expanded to ensure that the sample is sufficient and representative, thereby comprehensively improving the particle size detection accuracy of slurries of different concentrations.

[0030] In some preferred embodiments, such as Figure 6 , Figure 7 As shown, the first contact 1 and / or the second contact 2 are provided with at least two different specifications and models. The clamping surface dimensions of the first contact 1 and / or the second contact 2 of at least two different specifications are different. By replacing the first contact 1 and / or the second contact 2 of different specifications, the overlapping clamping area of ​​the orthographic projection of the first contact 1 and the second contact 2 can be adjusted to adapt to slurries of different concentrations.

[0031] In some preferred embodiments, such as Figure 8 , Figure 9 As shown, the first contact 1 and / or the second contact 2 have the degree of freedom of rotational displacement in the plane where the clamping surface is located. By rotating the relative position of the first contact 1 and / or the second contact 2, the overlapping clamping area of ​​the orthographic projection of the two contacts can be adjusted, thereby adapting to the detection conditions of slurry of different concentrations.

[0032] In some preferred embodiments, such as Figure 10 , Figure 11 As shown, the mineral particle size analyzer also includes a first frame S1, a second frame S2, and a guide shaft 3. The guide shaft 3 is slidably connected to the first frame S1 along its axial direction. A first contact 1 is detachably connected to one end of the guide shaft 3 along its axial direction. One end of the second frame S2 is connected to the first frame S1, and the other end extends along the axial direction of the guide shaft 3, with the end bent and extended radially along the guide shaft 3. A second contact 2 is connected to the radially extended end of the second frame S2 and is arranged opposite to the first contact 1. By detachably replacing the first contact 1 and / or the second contact 2 of different specifications, the overlapping clamping area of ​​their orthogonal projections can be adjusted.

[0033] Preferably, the first frame S1 has coaxial through holes S11 at both ends. The guide shaft 3 passes through the two axial through holes S11 and slides with the first frame S1 to limit the displacement of the guide shaft 3 through the axial through holes S11.

[0034] In some preferred embodiments, the other end of the guide shaft 3 is connected to a limiting component 8, the diameter of which is larger than the diameter of the axial through hole S11, for limiting one end of the guide shaft 3 to the outside of the first frame S1, so as to prevent the guide shaft 3 from falling off the first frame S1 when it moves along its axis.

[0035] In some preferred embodiments, the second frame S2 includes a connecting column S21, a connecting plate S22, and a locking component S23. The connecting column S21 is coaxially arranged with the guide shaft 3. One end of the connecting column S21 is connected to the first frame S1, and the other end is connected to the connecting plate S22 through the locking component S23. The connecting plate S22 is rotatably connected to the end of the connecting column S21 and is locked in place by the locking component S23. The second contact 2 is connected to the connecting plate S22 by wrapping around the connecting column S21 and is arranged opposite to the first contact 1. The overlapping clamping area of ​​the orthographic projection of the connecting plate S22 and the connecting column S21 can be adjusted by rotating and adjusting them.

[0036] Preferably, the connecting plate S22 has a connecting hole, and the end of the connecting column S21 is configured as a stepped shaft structure with a threaded hole machined on its end face. The connecting plate S22 is fitted onto the outer side of the small-diameter section of the connecting column S21 through the connecting hole. The locking component S23 is a bolt, which passes through the other side of the connecting hole and screws into the threaded hole of the connecting column S21. Thus, the connecting plate S22 can rotate circumferentially around the connecting column S21 to adjust its position, and tightening the locking component S23 completes the position locking. This assembly and locking structure is a conventional configuration in the art and is not further limited here.

[0037] In some preferred embodiments, the mineral particle size analyzer further includes a drive motor 4, the drive end of which is connected to a cam 5. The cam 5 is eccentrically connected to the drive shaft of the drive motor 4. A baffle 6 is fixedly connected to the outside of the guide shaft 3 and a return spring 7 is sleeved on it. The return spring 7 is limited between the end face of the baffle 6 and the first frame S1. Under the action of the rotating cam 5, the return spring is repeatedly compressed and elastically restored between the end face of the baffle 6 and the first frame S1, thereby realizing the reciprocating motion of the mechanism.

[0038] Preferably, the return spring 7 is limited between the baffle 6 and the upper end face of the first frame S1. Under the driving action of the drive motor 4, when the cam 5 rotates to the maximum eccentric position, the cam 5 pushes the baffle 6 to drive the guide shaft 3 to move upward along its axis and squeezes the return spring 7 to cause it to undergo elastic deformation. As the cam 5 rotates from the high point to the low point, the return spring 7 releases its elastic force, pushes the baffle 6 to drive the guide shaft 3 to move downward. This cycle is repeated, which can drive the guide shaft 3 to drive the first contact 1 to achieve axial reciprocating motion.

[0039] In some preferred embodiments, the mineral particle size analyzer further includes a sensor 9, which is used to detect the linear displacement distance of the first contact 1 and obtain the clamping distance between the first contact 1 and the second contact 2, and combine the displacement data to assist in the calculation of particle size.

[0040] In some preferred embodiments, the sensor 9 can be sleeved on the outside of the guide shaft 3, with an elastic detection head at its end that abuts against the end face of the second frame S2. The linear displacement of the first contact 1 is calculated by detecting the deformation of the elastic detection head. The sensor 9 can also be other types such as a laser sensor. The specific structure and selection of the sensor 9 are not specifically limited.

[0041] The specific embodiments of this application have been described in detail above. For those skilled in the art, several improvements and modifications can be made to this application without departing from the principle of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A mineral particle size analyzer adaptable to multiple concentration conditions, characterized in that: It includes a first contact (1) and a second contact (2) arranged opposite to each other. The first contact (1) and / or the second contact (2) have the degree of freedom to move linearly back and forth toward each other. Together they constitute a detection probe for clamping mineral slurry particles. The overlapping area of ​​the first contact (1) and the second contact (2) in the straight repositioning direction can be adjusted based on the slurry concentration.

2. The mineral particle size analyzer adapted to multiple concentration conditions according to claim 1, characterized in that: The overlapping area of ​​the first contact (1) and the second contact (2) in the straight repositioning direction is adjusted based on the reverse matching of the slurry concentration. The higher the slurry concentration, the smaller the overlapping area, and the lower the slurry concentration, the larger the overlapping area.

3. The mineral particle size analyzer adapted to multiple concentration conditions according to claim 1, characterized in that: The first contact (1) and / or the second contact (2) are provided with at least two different specifications and models. The clamping surface dimensions of the first contact (1) and / or the second contact (2) of at least two different specifications and models are different. By replacing the first contact (1) and / or the second contact (2) of different specifications and models, the overlapping clamping area of ​​the orthographic projection of the first contact (1) and the second contact (2) is adjusted.

4. The mineral particle size analyzer adapted to multiple concentration conditions according to claim 1, characterized in that: The first contact (1) and / or the second contact (2) have the degree of freedom of rotational displacement in the plane where the clamping surface is located. By rotating the relative position of the first contact (1) and / or the second contact (2), the clamping area of ​​the two contacts that overlap in the orthographic projection can be adjusted.

5. The mineral particle size analyzer adapted to multiple concentration conditions according to claim 1, characterized in that: It also includes a first frame (S1), a second frame (S2) and a guide shaft (3), the guide shaft (3) being slidably connected to the first frame (S1) along its axial direction, and a first contact (1) being connected to one end of the guide shaft (3) along its axial direction. One end of the second frame (S2) is connected to the first frame (S1), and the other end extends along the axial direction of the guide shaft (3), and the end extends in a bent direction along the radial direction of the guide shaft (3); The second contact (2) is connected to the radial extension end of the second frame (S2) and is arranged opposite to the first contact (1).

6. The mineral particle size analyzer adapted to multiple concentration conditions according to claim 5, characterized in that: One end of the guide shaft (3) is detachably connected to the first contact (1), and / or the second contact (2) is detachably connected to the radial extension end of the second frame (S2).

7. The mineral particle size analyzer adapted to multiple concentration conditions according to claim 5, characterized in that: The second frame (S2) includes a connecting column (S21), a connecting plate (S22), and a locking component (S23). The connecting column (S21) is coaxially arranged with the guide shaft (3). One end of the connecting column (S21) is connected to the first frame (S1), and the other end is connected to the connecting plate (S22) through the locking component (S23). The connecting plate (S22) is rotatably connected to the end of the connecting column and the connection position is locked by the locking component (S23). The second contact (2) is connected to the connecting plate (S22) and is arranged opposite to the first contact (1). The second contact (2) adjusts the overlapping area of ​​the orthographic projection of the two contacts by rotating the connecting plate (S22) around the connecting column (S21).

8. The mineral particle size analyzer adapted to multiple concentration conditions according to claim 5, characterized in that: The first frame (S1) has coaxially arranged axial through holes (S11) at both ends. The guide shaft (3) passes through the two axial through holes (S11) and forms a sliding fit with the first frame (S1).

9. The mineral particle size analyzer adapted to multiple concentration conditions according to claim 8, characterized in that: It also includes a drive unit (4), the drive end of the drive unit (4) is connected to a cam (5), the cam (5) is eccentrically mounted on the drive shaft of the drive unit (4), the guide shaft (3) is fixedly connected to a baffle (6) in the direction of the cam (5), and a return spring (7) is sleeved thereon. The return spring (7) is limited between the baffle (6) and the end face of the first frame (S1). Under the rotation of the cam (5), the return spring (7) is repeatedly compressed and elastically reset between the end face of the baffle (6) and the first frame (S1).

10. The mineral particle size analyzer adapted to multiple concentration conditions according to claim 1, characterized in that: It also includes a sensor (9), which is used to detect the linear displacement distance of the first contact (1) and obtain the clamping distance between the first contact (1) and the second contact (2).

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