A degassing feed device for a centrifugal concentrator

Abstract

The utility model belongs to mineral processing equipment technical field especially is concerned about a kind of degassing feeding device of centrifugal concentrator, including centrifugal separation device, and the top of centrifugal separation device is equipped with feeding device;Feeding device includes vacuum degassing cavity, and multiple distributors are fixedly connected in vacuum degassing cavity inner wall, and bottom fixedly connected with ultrasonic vibration bottom plate, and support bottom plate is equipped below ultrasonic vibration bottom plate, and ultrasonic transducer is clamped between two plates, conical flow guide bucket and ultrasonic transducer staggered arrangement, detachable demisting component is equipped in negative pressure pipe, gas-containing ore pulp enters by tangential feeding pipe, and it is guided and dispersed into multiple streams by spiral flow guide plate and multiple distributors, degassing treatment is carried out under vacuum environment, and ultrasonic vibration promotes bubble coalescence to float and prevents jam, and demisting component purifies extracted gas, the device effectively solves the problem that gas in ore pulp affects centrifugal concentration efficiency, improves precious metal recovery rate and equipment service life.

Description

Technical Field

[0001] This utility model belongs to the technical field of mineral processing equipment, and in particular relates to a degassing feeding device for a centrifugal concentrator. Background Technology

[0002] Vertical centrifugal concentrators are key equipment in the field of precious metal beneficiation, widely used for gravity separation of gold, silver, platinum group metals, and other minerals. These devices utilize enhanced gravity fields to achieve the effective recovery of fine-grained precious metals, playing a vital role in modern mineral processing.

[0003] However, in actual production applications, the feeding system of centrifugal concentrators has the following technical problems: First, excessively high air content in the slurry is one of the main factors affecting the efficiency of centrifugal mineral processing. In upstream grinding and classification operations, the intense stirring of the ball mill, the vortex effect of the hydrocyclone, the impeller agitation of the slurry pump, and the pressure changes during pipeline transportation all lead to a large amount of air being mixed into the slurry. These air bubbles adhere to the surface of the metal particles, generating additional buoyancy, causing fine-grained precious metals to be lost with the tailings, thus reducing the gold recovery rate.

[0004] Secondly, the complex behavior of bubbles in a centrifugal force field can interfere with the normal sorting process. Bubbles accumulate in the enrichment cone to form an "air cushion," hindering the deposition of heavy minerals; the disturbance caused by the bursting of bubbles can resuspend the deposited metal particles; the aggregates formed by microbubbles and mineral particles change the effective density of the particles, leading to a decrease in sorting accuracy. Utility Model Content

[0005] In view of the technical problems existing in the background art, this utility model provides a degassing feeding device for a centrifugal concentrator.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows: A degassing feeding device for a centrifugal concentrator includes a centrifugal separation device, with a feeding device at the top of the centrifugal separation device; The feeding device includes a vacuum degassing chamber. A multi-channel distributor is fixedly connected to the inner wall of the vacuum degassing chamber. An ultrasonic vibration base plate is fixedly connected to the bottom of the vacuum degassing chamber. Several conical guide buckets arranged in a circumferential array are fixedly connected to the bottom end of the ultrasonic vibration base plate. A support base plate is provided below the ultrasonic vibration base plate. Several ultrasonic transducers are sandwiched between the support base plate and the ultrasonic vibration base plate. The conical guide buckets and ultrasonic transducers are arranged alternately. Two symmetrically arranged negative pressure pipes are fixedly connected to the outer wall of the vacuum degassing chamber. The negative pressure pipes are in communication with the vacuum degassing chamber. The negative pressure pipes are inclined relative to the horizontal plane. A demisting component is detachably installed inside the negative pressure pipes.

[0007] Optionally, the multi-channel distributor includes several first triangular ribs and second triangular ribs fixedly connected to the inner wall of the vacuum degassing chamber. The first triangular ribs and second triangular ribs are arranged in a staggered, perpendicular manner. A spiral guide plate fixedly connected to the inner wall of the vacuum degassing chamber is provided above the multi-channel distributor. A tangential feed pipe is also fixedly connected to the outer wall of the vacuum degassing chamber.

[0008] Optionally, the ultrasonic transducer is fixedly connected to the supporting base plate, and the vibration surface of the ultrasonic transducer is in close contact with the ultrasonic vibration base plate, which is used to transmit ultrasonic vibration to the slurry in the vacuum degassing chamber.

[0009] Optionally, the defogging assembly includes two guide rails fixedly connected to the inner wall of the negative pressure pipe. A fixed frame is slidably connected to the inner wall of the guide rails. A number of corrugated plates with fixed intervals are fixedly connected to the inner wall of the fixed frame. A first metal wire mesh and a second metal wire mesh are also fixedly connected to the inner wall of the fixed frame.

[0010] Optionally, an end cap is fixedly connected to the top of the fixed frame, and a rectangular sealing ring is fitted onto the outer wall of the end cap. The top of the rectangular sealing ring abuts against the end cap, and the bottom of the rectangular sealing ring abuts against the outer wall of the negative pressure pipe.

[0011] Optionally, a connecting plate is fixedly connected to the outer end of the end cap, and a connecting angle iron is fixedly connected to the outer wall of the negative pressure pipe. The connecting plate is fixedly connected to the connecting angle iron by bolts.

[0012] Optionally, the outer end of the vacuum degassing chamber is fixedly connected to several, the bottom end of which is fixedly connected to the centrifugal separation device, the bottom end of the supporting base plate is fixedly connected to a feed hopper, and the bottom end of the feed hopper is fixedly connected to a guide pipe.

[0013] This utility model has the following advantages and beneficial effects: This invention utilizes a vacuum degassing chamber, a multi-channel distributor, and an ultrasonic vibration system to rapidly release dissolved gases and entrained bubbles from the slurry under negative pressure. A tangential feed pipe, combined with a spiral guide plate and two layers of intersecting triangular ribs, facilitates multi-stage flow distribution, preventing secondary air entrapment caused by direct impact. This disperses the slurry into multiple fine streams, increasing the degassing surface area. The cavitation effect generated by the ultrasonic transducer promotes the aggregation and upward movement of microbubbles. This method effectively solves the problem of gas-containing slurry introduced by upstream grinding and classification operations, eliminates the additional buoyancy effect of bubbles on metal particles, and ensures the effective recovery of fine precious metals. Compared to traditional central single-point feeding and simple defoamer treatment, this method avoids the formation of an "air cushion" in the centrifugal force field that hinders heavy mineral deposition, prevents the re-suspension of deposited metal particles due to bubble bursting and disturbance, avoids changes in effective density due to the aggregation of microbubbles and mineral particles, and prevents reagent contamination and equipment cavitation damage. This improves the separation accuracy and service life of centrifugal mineral processing. Attached Figure Description

[0014] Figure 1 This is a partial view of the degassing feeding device of the centrifugal concentrator of this utility model; Figure 2 This is a front view of the degassing feeding device of the centrifugal concentrator of this utility model; Figure 3 This utility model Figure 2 A cross-sectional view along the AA direction; Figure 4 This is a structural diagram of the degassing feeding device of this utility model; Figure 5 This is a partial view of the degassing feeding device of this utility model; Figure 6 This is a structural diagram of the multi-channel distributor of this utility model; Figure 7 This is a structural diagram of the defogging component of this utility model; Figure 8 This utility model Figure 7 A magnified view of a section at point B.

[0015] Reference numerals: 1. Centrifugal separator; 2. Vacuum degassing chamber; 3. Multi-channel distributor; 301. First triangular rib; 302. Second triangular rib; 4. Ultrasonic vibration base plate; 5. Conical guide hopper; 6. Support base plate; 7. Ultrasonic transducer; 8. Negative pressure pipe; 9. Demisting assembly; 901. Guide rail; 902. Fixing frame; 903. Corrugated plate; 904. First metal wire mesh; 905. Second metal wire mesh; 906. End cap; 907. Rectangular sealing ring; 908. Connecting plate; 909. Connecting angle iron; 10. Spiral guide plate; 11. Tangential feed pipe; 12. Support; 13. Feed hopper; 14. Guide pipe. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] Example like Figures 1 to 8 As shown, a degassing feeding device for a centrifugal concentrator includes a centrifugal separation device 1 and a feeding device disposed at its top.

[0019] like Figures 2-5 As shown, the feeding device includes a vacuum degassing chamber 2. A multi-channel distributor 3 is fixedly connected to the inner wall of the vacuum degassing chamber 2. An ultrasonic vibration base plate 4 is fixedly connected to the bottom of the vacuum degassing chamber 2. The vacuum degassing chamber 2 is a cylindrical container with a smooth and polished inner wall to reduce bubble adhesion. The outer wall of the chamber is equipped with an observation window and a pressure gauge interface for easy monitoring of the operating status. Several conical guide buckets 5 arranged in a circumferential array are fixedly connected to the bottom of the ultrasonic vibration base plate 4. A support base plate 6 is provided below the ultrasonic vibration base plate 4. Several ultrasonic transducers 7 are sandwiched between the support base plate 6 and the ultrasonic vibration base plate 4. The conical guide buckets 5 and the ultrasonic transducers 7 are arranged alternately. The conical structure effectively prevents material accumulation. The ultrasonic transducers 7 are fixed to the support base plate 6 by bolts to ensure that the vibration surface is in close contact with the ultrasonic vibration base plate 4, resulting in high sound energy transmission efficiency. The ultrasonic vibration is transmitted to the slurry through the ultrasonic vibration base plate 4, generating a cavitation effect that promotes the aggregation and floating of microbubbles, while preventing the conical guide buckets 5 from clogging.

[0020] Two symmetrically arranged negative pressure pipes 8 are fixedly connected to the outer wall of the vacuum degassing chamber 2, and the negative pressure pipes 8 are connected to the vacuum degassing chamber 2. The negative pressure pipes 8 are inclined relative to the horizontal plane. A demisting component 9 is detachably installed inside the negative pressure pipe 8. The symmetrical arrangement of the two negative pressure pipes 8 and the design of being inclined relative to the horizontal plane allow the condensate generated in the pipes to flow back to the degassing chamber naturally, avoiding the formation of a liquid seal that affects the vacuum degree. The negative pressure pipes 8 are connected to a vacuum pump group to provide a stable vacuum degree and provide a continuous driving force for degassing. Under the action of negative pressure, the dissolved gas and entrained bubbles in the slurry are rapidly released, achieving efficient degassing and effectively reducing the gas content of the slurry, creating ideal conditions for subsequent centrifugal separation.

[0021] like Figures 4-6 As shown, the multi-channel distributor 3 includes several first triangular ribs 301 and second triangular ribs 302 fixedly connected to the inner wall of the vacuum degassing chamber 2. The first triangular ribs 301 and second triangular ribs 302 are arranged in a vertically intersecting staggered layer. A spiral guide plate 10 fixedly connected to the inner wall of the vacuum degassing chamber 2 is provided above the multi-channel distributor 3. A tangential feed pipe 11 is also fixedly connected to the outer wall of the vacuum degassing chamber 2. The spiral guide plate 10 guides the tangentially entering slurry to flow spirally from the edge to the center, avoiding direct impact and secondary air entrapment. The second triangular ribs 302 are arranged in a vertically intersecting staggered layer with the first triangular ribs 301, further dispersing the slurry into multiple fine streams. The intersecting staggered layer arrangement of the two triangular ribs greatly increases the gas-liquid contact area and improves the degassing efficiency. Compared with traditional single-point feeding, the flow distribution uniformity is improved, effectively eliminating local overload phenomenon and reducing impact damage to the equipment.

[0022] In this invention, the gaseous slurry enters the vacuum degassing chamber 2 tangentially through the tangential feed pipe 11. It first contacts the spiral guide plate 10, and its speed gradually decreases under the guidance of the spiral plate. Then, the slurry falls vertically from the central area. The second triangular rib 302 and the first triangular rib 301 further disperse the slurry into multiple fine streams that enter the main degassing area. At the same time, the vacuum pump group is started, and the vacuum degassing chamber 2 is evacuated through the negative pressure pipe 8. The slurry falls onto the ultrasonic vibration base plate 4 and accumulates, forming a closed space with the vacuum degassing chamber 2.

[0023] like Figures 2-5 As shown, the ultrasonic transducer 7 is fixedly connected to the supporting base plate 6. The vibration surface of the ultrasonic transducer 7 is in close contact with the ultrasonic vibration base plate 4, which is used to transmit ultrasonic vibration to the slurry in the vacuum degassing chamber 2. Multiple ultrasonic transducers 7 are evenly distributed and fixed to the supporting base plate 6 by bolts. The close contact ensures efficient sound energy transmission.

[0024] The multiple streams dispersed by the second triangular rib 302 and the first triangular rib 301 are degassed in a vacuum environment with sufficient residence time. The high-frequency vibration generated by the ultrasonic transducer 7 is transmitted to the slurry through the ultrasonic vibration base plate 4, promoting bubble coalescence and flotation separation. The degassed slurry flows smoothly down through the conical guide bucket 5, avoiding accumulation on the base plate and ensuring continuous and stable feeding.

[0025] like Figure 4 and Figures 7-8 As shown, the demisting assembly 9 includes two guide rails 901 fixedly connected to the inner wall of the negative pressure pipe 8. A fixed frame 902 is slidably connected to the inner wall of the guide rails 901. Several corrugated plates 903 with fixed spacing are fixedly connected to the inner wall of the fixed frame 902. A first metal wire mesh 904 and a second metal wire mesh 905 are also fixedly connected to the inner wall of the fixed frame 902. The demisting assembly adopts a detachable insertion structure for easy maintenance and replacement. The guide rails 901 are fixed to the inner wall of the negative pressure pipe 8, and the fixed frame 902 is slidably inserted through the guide rails 901 to achieve quick installation. The corrugated plates 903 are made of stainless steel and have a corrugated structure, which mainly removes larger droplets and has high separation efficiency. The two layers of metal wire mesh remove droplets of different particle sizes respectively. The multi-stage demisting design ensures high demisting efficiency.

[0026] An end cap 906 is fixedly connected to the top of the fixed frame 902. A rectangular sealing ring 907 is fitted onto the outer wall of the end cap 906. A connecting plate 908 is fixedly connected to the outer end of the end cap 906. A connecting angle iron 909 is fixedly connected to the outer wall of the negative pressure pipe 8. The connecting plate 908 is fixedly connected to the connecting angle iron 909 by bolts. The rectangular sealing ring 907 is made of corrosion-resistant material to ensure good airtightness of the system.

[0027] The gas removed from the slurry carries some droplets and enters the demisting component 9 through the negative pressure pipe 8. The gas first undergoes preliminary demisting through the corrugated plate 903, and then undergoes fine demisting through the first metal wire mesh 904 and the second metal wire mesh 905 in sequence. The purified gas is extracted by the vacuum pump, and the separated droplets flow back into the vacuum degassing chamber 2 along the pipe wall.

[0028] Several supports 12 are fixedly connected to the outer end of the vacuum degassing chamber 2. The bottom end of the supports 12 is fixedly connected to the centrifugal separator 1. A feed hopper 13 is fixedly connected to the bottom end of the supporting base plate 6. A guide pipe 14 is fixedly connected to the bottom end of the feed hopper 13. The supports 12 are made of structural steel to ensure the stability of the overall structure. The feed hopper 13 has a conical structure, which effectively collects the degassed slurry. The guide pipe 14 evenly conveys the processed slurry to the centrifugal separator 1, achieving stable and reliable feeding and providing ideal low-gas slurry for centrifugal separation.

[0029] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A degassing feeding device for a centrifugal concentrator, comprising a centrifugal separation device (1), characterized in that, The centrifugal separation device (1) is equipped with a feeding device at its top; The feeding device includes a vacuum degassing chamber (2), with a multi-channel distributor (3) fixedly connected to the inner wall of the vacuum degassing chamber (2). An ultrasonic vibration base plate (4) is fixedly connected to the bottom of the vacuum degassing chamber (2). Several conical guide buckets (5) arranged in a circumferential array are fixedly connected to the bottom end of the ultrasonic vibration base plate (4). A support base plate (6) is provided below the ultrasonic vibration base plate (4). Several ultrasonic transducers (7) are sandwiched between the support base plate (6) and the ultrasonic vibration base plate (4). The conical guide buckets (5) and the ultrasonic transducers (7) are arranged alternately. Two symmetrically arranged negative pressure pipes (8) are fixedly connected to the outer wall of the vacuum degassing chamber (2), and the negative pressure pipes (8) are connected to the vacuum degassing chamber (2). The negative pressure pipes (8) are inclined relative to the horizontal plane. A demisting component (9) is detachably provided inside the negative pressure pipes (8).

2. The degassing feeding device for a centrifugal concentrator according to claim 1, characterized in that: The multi-channel distributor (3) includes several first triangular ribs (301) and second triangular ribs (302) fixedly connected to the inner wall of the vacuum degassing chamber (2). The first triangular ribs (301) and the second triangular ribs (302) are arranged in a staggered and perpendicular manner. A spiral guide plate (10) fixedly connected to the inner wall of the vacuum degassing chamber (2) is provided above the multi-channel distributor (3). A tangential feed pipe (11) is also fixedly connected to the outer wall of the vacuum degassing chamber (2).

3. The degassing feeding device for a centrifugal concentrator according to claim 1, characterized in that: The ultrasonic transducer (7) is fixedly connected to the supporting base plate (6), and the vibration surface of the ultrasonic transducer (7) is closely fitted with the ultrasonic vibration base plate (4) to transmit ultrasonic vibration to the slurry in the vacuum degassing chamber (2).

4. The degassing feeding device for a centrifugal concentrator according to claim 1, characterized in that: The defogging assembly (9) includes two guide rails (901) fixedly connected to the inner wall of the negative pressure pipe (8). A fixed frame (902) is slidably connected to the inner wall of the guide rails (901). A number of corrugated plates (903) with fixed spacing are fixedly connected to the inner wall of the fixed frame (902). A first metal wire mesh (904) and a second metal wire mesh (905) are also fixedly connected to the inner wall of the fixed frame (902).

5. The degassing feeding device for a centrifugal concentrator according to claim 4, characterized in that: The top of the fixed frame (902) is fixedly connected to an end cap (906), and a rectangular sealing ring (907) is fitted on the outer wall of the end cap (906). The top of the rectangular sealing ring (907) abuts against the end cap (906), and the bottom of the rectangular sealing ring (907) abuts against the outer wall of the negative pressure pipe (8).

6. The degassing feeding device for a centrifugal concentrator according to claim 5, characterized in that: The outer end of the end cap (906) is fixedly connected to a connecting plate (908), and the outer wall of the negative pressure pipe (8) is fixedly connected to a connecting angle iron (909). The connecting plate (908) is fixedly connected to the connecting angle iron (909) by bolts.

7. The degassing feeding device for a centrifugal concentrator according to claim 1, characterized in that: The outer end of the vacuum degassing chamber (2) is fixedly connected to several supports (12), the bottom end of the supports (12) is fixedly connected to the centrifugal separation device (1), the bottom end of the support base plate (6) is fixedly connected to the feed hopper (13), and the bottom end of the feed hopper (13) is fixedly connected to the guide pipe (14).

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