A slope adjusting device for a rolling cradle and a rolling cradle

Abstract

This utility model discloses a slope adjustment device for a rolling shaker and the rolling shaker itself. The rolling shaker includes a bed surface assembly, which includes a bed surface. The slope adjustment device includes two sets of double-rack manual slope adjustment mechanisms respectively positioned at the front and rear, with two mechanisms in each set (left and right). Each slope adjustment mechanism includes an upper rack and a lower rack that mesh with each other. The slope required to form the bed surface is adjusted by adjusting the meshing position between the upper and lower racks. This utility model, a slope adjustment device for a rolling shaker and the rolling shaker itself, utilizes two sets of double-rack manual slope adjustment mechanisms respectively positioned at the front and rear, with two mechanisms in each set (left and right). Each slope adjustment mechanism includes an upper rack and a lower rack that mesh with each other. The slope required to form the bed surface is adjusted by adjusting the meshing position between the upper and lower racks, thereby enabling precise adjustment of the bed surface slope and significantly optimizing the sorting effect.

Description

Technical Field

[0001] This utility model relates to the field of mineral sorting equipment technology, and in particular to a slope adjustment device for a rolling shaking table and the rolling shaking table. Background Technology

[0002] Rare metals (such as tungsten and tin) are strategic materials, and the beneficiation precision of these minerals directly affects resource utilization and industrial competitiveness. Fine-grained minerals (such as mineral particles smaller than 0.074 mm) have small particle size and large specific surface area, making it difficult for traditional sorting equipment to achieve effective stratification, resulting in serious resource waste.

[0003] Traditional shaking tables achieve mineral separation based on the combined effects of inertial vibration and water washing, but their core shortcomings are reflected in three aspects:

[0004] Bottleneck in sorting efficiency: The single-waveform structure of the bed cannot meet the differentiated movement requirements of minerals with different densities and particle sizes, resulting in high-density particles being entrained by low-density particles, leading to high impurity content in the concentrate. According to industry data, traditional equipment achieves a concentrate recovery rate of only 30%-50% for tin ore (particle size < 0.1mm), with a grade improvement of less than 10%.

[0005] Insufficient stratification mechanism: When mineral particles move on the bed surface, they are easily affected by eddies and collisions between particles, forming an alternating state of "dispersion-agglomeration". Low-density particle agglomerates hinder the settling of high-density particles, especially when processing slurries with high mud content (such as coastal placer deposits), where stratification efficiency decreases by more than 20%.

[0006] Uneven material distribution: Traditional feeding devices use fixed-width feed troughs, and the standard deviation of the slurry distribution along the bed surface reaches 15%-20%. The thickness of the slurry in local accumulation areas is 1.5-2 times the average thickness, resulting in insufficient separation time in these areas and an increased proportion of high-density particles lost in the tailings. Utility Model Content

[0007] This utility model provides an slope adjustment device and a rolling shaking table for optimizing sorting effect.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows:

[0009] A slope adjustment device for a rolling rocking table, the rolling rocking table including a bed surface assembly including a bed surface, the slope adjustment device including two sets of double rack manual slope adjustment mechanisms respectively located at the front and rear positions, each set having two on the left and right, each slope adjustment mechanism including an upper rack and a lower rack that mesh with each other, the slope required to form the bed surface is adjusted by adjusting the meshing position between the upper rack and the lower rack.

[0010] The bed assembly further includes a feeding mechanism and a fixed bracket for supporting and fixing the feeding mechanism. The feeding mechanism is fixed on the fixed bracket, and the bed is located between the feeding mechanism and the fixed bracket. The rolling shaking table also includes a vibration device, which includes a movable seat and a vibration mechanism. One end of the movable seat is connected to the vibration mechanism, and the upper end is connected to the fixed bracket. The upper rack and the lower rack are respectively fixed on the fixed bracket and the movable seat. The height of the fixed bracket is adjusted by adjusting the meshing position between the upper rack and the lower rack to form the required slope of the bed.

[0011] A rolling shaking table includes a table surface assembly, a transmission device, a slope adjustment device, and a vibration device; the table surface assembly includes a table surface and a feeding mechanism, the feeding mechanism being used to provide slurry and water, allowing the slurry and water to flow onto the table surface; the transmission device is used to drive the table surface to move; the slope adjustment device is used to adjust the slope of the table surface; the vibration device is used to cause the table surface to vibrate, the vibration direction being perpendicular to the ore flow direction; the slope adjustment device is the slope adjustment device described above.

[0012] The vibration device and the transmission device work together to form an orthogonal "vibration-drag" composite motion field.

[0013] The bed surface adopts a modular structure, which is quickly assembled from multiple modules through connection ports. The bed surface material is a corrugated belt made of EPDM rubber.

[0014] The bed surface has three specifications: coarse lines, medium lines, and fine lines, forming gradient guide grooves on the bed surface.

[0015] The feeding mechanism is located above one side of the bed surface and includes, in longitudinal order, a ore feed inlet, a ore feed trough, a water feed inlet, and a water feed trough, so that the ore slurry and water are stored in the ore feed trough and the water feed trough respectively through the ore feed inlet and the water feed inlet, and then flow to the bed surface.

[0016] The ore feed trough has an opening on its side and a gate is provided to control the slurry flow rate. The water feed trough has a water distribution hole on its side to supply water to the bed surface. A diamond-shaped adjustable wooden block is provided in the trough near the water distribution hole to control the uniform speed of water flow in the bed surface cleaning area.

[0017] The transmission device includes a belt drive mechanism and two rollers. The two rollers are fixed to a fixed bracket and are located at the front and rear ends respectively. The front and rear of the bed are connected and rolled into a conveyor belt and sleeved on the two rollers.

[0018] The vibration mechanism includes a variable frequency speed control motor and an eccentric connecting rod mechanism. The variable frequency speed control motor drives the eccentric connecting rod mechanism to cause the bed surface to vibrate.

[0019] The beneficial effects of this utility model are as follows: This utility model is used for a slope adjustment device for a rolling shaking table and a rolling shaking table. The slope adjustment device includes two sets of double rack manual slope adjustment mechanisms respectively set at the front and rear positions. Each set has two on the left and right. Each slope adjustment mechanism includes an upper rack and a lower rack that mesh with each other. By adjusting the meshing position between the upper rack and the lower rack, the slope required to form the bed surface can be adjusted, thereby accurately adjusting the slope of the bed surface and significantly optimizing the sorting effect. Attached Figure Description

[0020] Figure 1 This is a perspective view of a rolling shaker according to an embodiment of the present invention.

[0021] Figure 2 for Figure 1 The image shows the front view of the rolling rocker.

[0022] Figure 3 for Figure 1 The image shows a top view of a rolling rocker.

[0023] Figure 4 for Figure 1 The front view of the bed assembly and transmission device in the rolling shaking table shown.

[0024] Figure 5 for Figure 4 The top view of the bed assembly and transmission device shown.

[0025] Figure 6 for Figure 4 The image shows a bottom view of the bed assembly and transmission device.

[0026] Figure 7 for Figure 1 The front view of the movable seat in the rolling shaker shown.

[0027] Figure 8 for Figure 7 The bottom view of the movable seat shown.

[0028] Figure 9 for Figure 1 The front view of the base in the rolling shaker shown.

[0029] Figure 10 for Figure 9 Top view of the base shown.

[0030] Figure 11 for Figure 1 A magnified view of a portion at point A shown. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and examples.

[0032] like Figures 1 to 3As shown, the rolling rocking bed of this invention includes a bed surface assembly 1, a transmission device 2, an incline adjustment device 3, a vibration device 4, and a base 5.

[0033] Combination Figures 4 to 8 As shown, the bed assembly 1 includes a fixed bracket 11, a bed surface 12, and a feeding mechanism 13.

[0034] The bed surface 12 is a corrugated belt made of ethylene propylene diene monomer (EPDM) rubber, which is characterized by its wear resistance and corrosion resistance. In terms of wear resistance, it has a Shore hardness of 60-70 HA and an wear rate of <0.05 g / m² (standard ASTM D5963 test), extending its service life by 5-8 times compared to traditional cast iron bed surfaces. Regarding corrosion resistance, it is resistant to slurry corrosion at pH 3-12, making it suitable for acidic conditions (such as sulfide ore flotation tailings) and alkaline conditions (such as oxidized ore leaching solutions). The bed surface 12 adopts a modular structure, consisting of multiple modules that can be quickly assembled via connectors. During maintenance, worn areas can be replaced locally, reducing maintenance costs by 60%.

[0035] The bed surface 12 can be configured with three series: coarse, medium, and fine.

[0036] The coarse sand bed has a corrugation height of 4-6 mm, a spacing of 6-10 mm, a longitudinal inclination of 1°-7° (slope in the length direction of the bed surface), a transverse inclination of 0.5°-1.2° (slope in the width direction of the bed surface), and a processing capacity of 3-4 tons per hour.

[0037] The corrugation height of the medium sand bed is 3-5mm, the spacing is 3-6mm, the longitudinal inclination is 2°-5°, the transverse inclination angle is 0.5°-1.2°, and the hourly processing capacity is 2-3 tons.

[0038] The fine sand bed has a corrugation height of 3-4 mm, a spacing of 2-4 mm, a longitudinal inclination of 1°-4°, a transverse inclination angle of 0.5°-1.2°, and a processing capacity of 1.5-2 tons per hour.

[0039] The feeding mechanism 13 is located above one side of the bed surface 12 and is made of polyethylene sheet or stainless steel. It includes, in longitudinal order, a feed inlet 131, a feed trough 132, a water inlet 133, and a water tank 134. The slurry and water are stored in the feed trough 132 and water tank 134 respectively through the feed inlet 131 and water inlet 133 before flowing onto the bed surface 12. The feed trough 132 has openings on its side and is equipped with a gate to control the slurry flow rate, allowing the slurry to flow naturally by gravity. The water tank 134 has water distribution holes on its side for supplying water to the bed surface 12, and a diamond-shaped adjustable wooden block 135 is located near the water distribution holes inside the tank to control the uniform water flow rate in the washing area of ​​the bed surface 12.

[0040] The fixed bracket 11 is used to support the fixed feeding mechanism 13, which is connected to the fixed bracket 11. The bed surface 12 is located between the feeding mechanism 13 and the fixed bracket 11. The fixed bracket 11 is a frame structure with three support rods 111 in the middle for supporting the bed surface 12.

[0041] The transmission device 2 includes a belt drive mechanism (such as a motor, not shown) and two rollers 21. The two rollers 21 are fixed to the fixed bracket 11 and are located at the front and rear ends respectively. The bed surface 12 is wound into a conveyor belt shape and sleeved on the two rollers 21. The belt drive mechanism is connected to one of the rollers 21, and drives the bed surface 12 to move in the front-to-back direction by rotating the drive roller 21. The belt drive mechanism uses a 3kW variable frequency motor, and the linear speed of the corrugated belt driving the bed surface 12 is adjustable from 0.5-2m / min.

[0042] The vibration device 4 includes a movable base 41 and a vibration mechanism 42. The vibration mechanism 42 uses a 7.5kW variable frequency speed control motor to drive an eccentric connecting rod mechanism, achieving stepless adjustment of stroke (8-30mm) and stroke rate (250-320 times / minute). The eccentric connecting rod mechanism is made of high carbon steel with surface carburizing treatment (hardness HRC58-62), and is equipped with self-lubricating spherical bearings, with a motion accuracy error of <±0.5%.

[0043] One end of the movable seat 41 is connected to the vibration mechanism 42, and the upper part is connected to the fixed bracket 11. When the vibration mechanism 42 is started, it drives the movable seat 41 to vibrate, which in turn drives the fixed bracket 11 and the feeding mechanism 13, transmission device 2 and bed surface 12 connected to the fixed bracket 11 to vibrate together.

[0044] like Figure 11 As shown, the slope adjustment device 3 includes two sets of double-rack manual slope adjustment mechanisms 3 respectively located at the front and rear positions. Each set has two mechanisms, one on the left and one on the right. Each slope adjustment mechanism 3 includes an upper rack 31 and a lower rack 32 that mesh with each other. The upper rack 31 and the lower rack 32 are respectively connected to the fixed bracket 11 and the movable seat 41 (they can be connected by hinges, and each hinge position is equipped with a return spring, which generates a thrust on the upper rack 31 and the lower rack 32 in opposite directions, so that the upper rack 31 and the lower rack 32 tend to move in opposite directions, thereby achieving a tight fit between the upper rack 31 and the lower rack 32). By adjusting the meshing position between the upper rack 31 and the lower rack 32, the height of the fixed bracket 11 is adjusted to form the required slope of the bed surface 12, so that the bed surface 12 is longitudinally inclined at 1°-10°. When inclined, the feed end is higher than the tailings end.

[0045] For minerals with a density difference ≥1.5 g / cm³, the recommended dip angle range is:

[0046] Fine-grained (0.02-0.1mm): 1°-4° (enhances water flow carrying capacity);

[0047] Medium to coarse grain (0.1-2mm): 3°-10° (enhanced gravity stratification).

[0048] like Figure 9 , Figure 10 As shown, the base 5 is located below the movable seat 41, and the two are hinged together by the movable rod 51, so that the movable seat 41 is supported by the base 5 and can swing under the action of the vibration mechanism 42.

[0049] In this embodiment, the vibration device 4 and the transmission device 2 work together to drive the vibration direction perpendicular to the direction of the ore flow, forming an orthogonal "vibration-drag" composite motion field, so that the ratio of the inertial force to the shear force on the particles can be dynamically adjusted.

[0050] Its vibration field characteristics are described below.

[0051] The variable frequency speed control motor drives the bed surface to perform sinusoidal reciprocating motion through an eccentric connecting rod. The displacement equation is:

[0052] x(t) = A\sin(2\pi ft + \phi)

[0053] The stroke A = 8-30 mm, the number of strokes f = 4.17-6.67 Hz, and the phase angle φ = 0. The peak vibration acceleration can reach 0.2-0.8 g (g is the acceleration due to gravity), giving the particles an inertial force drive.

[0054] The characteristics of the belt shear field are described below.

[0055] The corrugated belt moves against the direction of the ore flow at a speed of v = 0.5-2 m / min (perpendicular to the direction of vibration), creating a shear velocity gradient on the surface of the bed.

[0056] \frac{dv}{dy} = \frac{v}{h}

[0057] The liquid layer thickness h = 3-5 mm, and the shear rate can reach 100-667 s⁻¹, effectively dispersing particle agglomerates.

[0058] The mineral sorting kinetics process in this embodiment is described below.

[0059] I. Loose water flow and concentration homogenization

[0060] High-pressure clean water (0.1-0.3 MPa) is injected from the water supply tank through water distribution holes along the transverse direction of the bed surface, forming a 3-5 mm thin water layer. According to Darcy's law, the relationship between the water infiltration velocity v_w and the hydraulic gradient i is:

[0061] v_w = K i

[0062] Among them, the permeability coefficient K = 0.1-0.5 cm / s (depending on the porosity of the bed) and the hydraulic gradient i = 0.05-0.2 reduce the relative standard deviation of the slurry solid concentration from 25% in traditional equipment to 12%.

[0063] II. Density Stratification

[0064] Under the combined action of the vibrational inertial force F_i = ma and the water flow drag force F_d = \frac{1}{2} \rho v^2 C_d A, the particle settling velocity u_t satisfies:

[0065] u_t = \sqrt{\frac{4d(\rho_s - \rho)g}{3\rho C_d}}

[0066] The particle diameter is d = 0.02-2 mm, the solid phase density is 2.5-7.5 g / cm³, the liquid phase density is 1.0-1.2 g / cm³, and the drag coefficient is Cd = 0.44-24 / dp (based on the particle Reynolds number). High-density particles (such as cassiterite, 6.8 g / cm³) settle 2-3 times faster than low-density particles (such as quartz, 2.65 g / cm³), achieving effective stratification.

[0067] III. Directional Flow and Separation

[0068] The corrugated belt surface of the bed has three specifications (coarse lines 6-10mm wide, medium lines 3-6mm wide, and fine lines 2-4mm wide) to form gradient guide channels:

[0069] The bottom layer of high-density minerals: driven by the friction of the conveyor belt, they move towards the concentrate end along the guide channel, with an average migration speed of 0.1-0.5 m / s;

[0070] Upper layer of low-density minerals: discharged from the tailings end with the water flow, with an average flow velocity of 0.3-0.8 m / s.

[0071] By adjusting the belt speed and vibration parameters, the angle between the trajectories of the two types of particles can be controlled between 30° and 60°, reducing cross-contamination.

[0072] The beneficial effects of this embodiment are:

[0073] I. Breakthrough in sorting efficiency

[0074] Grade Improvement: For the Gejiu tin mine in Yunnan (raw ore grade 0.25%), the concentrate grade was increased from 3.5% with traditional equipment to 4.8%-5.2% (an increase of 37%-49%), reaching the smelting grade standard;

[0075] Recovery rate optimization: For Hainan coastal sand deposits (ilmenite content 15%), the recovery rate has been increased from 55% in the traditional process to 78%-82%, resulting in an annual increase of approximately 2,000 tons of titanium concentrate.

[0076] Processing capacity: Under the same energy consumption, the processing capacity per unit bed surface reaches 1.5-4 t / h, which is 20%-70% higher than that of traditional equipment.

[0077] II. Expanding Process Adaptability

[0078] Particle size compatibility range: It can stably handle ultrafine particles of 0.02mm (such as tungsten ore slime) and coarse particles of 2mm (such as placer gold ore), and can quickly switch between different corrugated modules;

[0079] Density difference adaptability: For mineral assemblages with a density difference ≥1.5g / cm³ (such as ilmenite and gangue), the separation efficiency is 18%-25% higher than that of traditional shaking tables;

[0080] Handling complex working conditions: Integrated anti-clogging and anti-sticking design, it can handle slurry with mud content ≤30% without pre-desliming, simplifying the process.

[0081] III. Operation Optimization

[0082] Parameter self-learning function: The system has processed more than 100,000 sets of data and can match parameters for new mineral types through historical cases, reducing the initial debugging time from 4 hours to 1.5 hours;

[0083] Energy consumption control: The variable frequency drive system reduces average power consumption by 15%-20%, with power consumption per ton of ore ≤8kWh, which meets national energy-saving standards.

Claims

1. A slope adjustment device for a rolling rocking table, the rolling rocking table comprising a bed surface assembly, the bed surface assembly comprising a bed surface, characterized in that, The slope adjustment device includes two sets of double rack manual slope adjustment mechanisms located at the front and rear positions respectively. Each set has two mechanisms on the left and right. Each slope adjustment mechanism includes an upper rack and a lower rack that mesh with each other. The slope required to form the bed surface is adjusted by adjusting the meshing position between the upper rack and the lower rack.

2. The slope adjustment device for the rolling shaking table according to claim 1, characterized in that, The bed assembly also includes a feeding mechanism and a fixed bracket for supporting and fixing the feeding mechanism. The feeding mechanism is fixed on the fixed bracket, and the bed is located between the feeding mechanism and the fixed bracket. The rolling shaking table also includes a vibration device, which includes a movable seat and a vibration mechanism. One end of the movable seat is connected to the vibration mechanism, and the upper end is connected to the fixed bracket. The upper rack and the lower rack are respectively fixed on the fixed bracket and the movable seat. The height of the fixed bracket is adjusted by adjusting the meshing position between the upper rack and the lower rack to form the required slope of the bed.

3. A rotating shaking table, characterized in that, The device includes a bed assembly, a transmission device, a slope adjustment device, and a vibration device. The bed assembly includes a bed surface and a feeding mechanism, which provides slurry and water to flow onto the bed surface. The transmission device drives the bed surface to move. The slope adjustment device adjusts the slope of the bed surface. The vibration device causes the bed surface to vibrate, with the vibration direction perpendicular to the ore flow direction. The slope adjustment device is the slope adjustment device as described in claim 1 or 2.

4. The rolling shaking table according to claim 3, characterized in that, The vibration device and the transmission device work together to form an orthogonal "vibration-drag" composite motion field.

5. The rolling shaking table according to claim 3, characterized in that, The bed surface adopts a modular structure, which is quickly assembled from multiple modules through connection ports. The bed surface material is a corrugated belt made of EPDM rubber.

6. The rolling shaking table according to claim 5, characterized in that, The bed surface has three specifications: coarse lines, medium lines, and fine lines, forming gradient guide grooves on the bed surface.

7. The rolling shaking table according to claim 3, characterized in that, The feeding mechanism is located above one side of the bed surface and includes, in sequence along the longitudinal direction, a ore feed inlet, a ore feed trough, a water feed inlet, and a water feed trough, so that the ore slurry and water are stored in the ore feed trough and the water feed trough respectively through the ore feed inlet and the water feed inlet, and then flow to the bed surface.

8. The rolling shaking table according to claim 7, characterized in that, The side of the ore feed trough has an opening and a gate is provided to control the slurry flow rate. The side of the water feed trough has a water distribution hole for water to flow to the bed surface, and a diamond-shaped adjustable wooden block is provided in the trough near the water distribution hole to control the uniform speed of water flow in the bed surface cleaning area.

9. The rolling shaking table according to claim 3, characterized in that, The transmission device includes a belt drive mechanism and two rollers. The two rollers are fixed to a fixed bracket and are located at the front and rear ends respectively. The front and rear of the bed are connected and rolled into a conveyor belt and sleeved on the two rollers.

10. The rolling shaking table according to claim 3, characterized in that, The vibration mechanism includes a variable frequency speed control motor and an eccentric connecting rod mechanism. The variable frequency speed control motor drives the eccentric connecting rod mechanism to cause the bed surface to vibrate.

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