CN218654948U - High-efficient efflux flotation device - Google Patents

High-efficient efflux flotation device Download PDF

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Publication number
CN218654948U
CN218654948U CN202222682531.6U CN202222682531U CN218654948U CN 218654948 U CN218654948 U CN 218654948U CN 202222682531 U CN202222682531 U CN 202222682531U CN 218654948 U CN218654948 U CN 218654948U
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China
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flotation machine
tank body
downcomer
ejector
pipe
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CN202222682531.6U
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吴熙宸
王德喜
任腾
吴全才
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Shenyang University of Technology
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Shenyang University of Technology
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Abstract

The utility model discloses a novel high-efficient efflux flotation device adopts the fluidic mode of multitube to carry out the efflux flotation. The efficient jet flow flotation machine comprises an ejector, a lower guide pipe and a tank body, wherein the tank body is provided with a tailing discharge hole and a concentrate overflow hole, the bottom of the lower guide pipe is positioned in the tank body, and the discharge hole of the ejector is communicated with at least two lower guide pipes.

Description

High-efficient efflux flotation device
Technical Field
The utility model relates to a mineral processing equipment technical field, concretely relates to be applied to high-efficient jet flotation machine of non ferrous metal, rare metal, ferrous metal and non-metallic mineral flotation.
Background
At present, most of jet flotation machines widely applied to domestic ore dressing markets are single-tube type jet flotation machines which mainly comprise a feeding device, an ejector, a lower guide pipe, a groove body, an enrichment discharge device and the like, mixed ore pulp is pressurized by a sand pump, pressed in from a mixed pulp inlet, ejected out from a nozzle at a high speed of 15-30 m/s, sucked into a cavity chamber by active inflation or negative pressure forming and the like to be mixed with the mixed pulp, and then enters the groove body through the lower guide pipe. The mineral is fully collided and mineralized with the formed micro bubbles in the lower guide pipe, is mineralized again after being discharged out of the lower guide pipe, is cleaned by a cleaning water device after being captured by the bubbles, is enriched by an enrichment device and is finally discharged. The tailings are discharged out of the tank body through a tailing discharge device.
Although the prior equipment has the advantages of large processing capacity, high recovery efficiency, short processing time and the like, the following defects still exist:
(1) The service area is small, the service radius of a single pipe is limited, if a plurality of jet pipes are arranged in one groove, the consumption is large, the engineering installation is complex, and turbulent slurry discharged by a downcomer can be influenced mutually.
(2) The granularity range that can the flotation is comparatively fixed, and the mineral of traditional structure efflux flotation device service is targeted, and is applicable to the flotation of fine grain mineral more, and the mineral is become coarse grain mineral then flotation ability is showing to be declined, influences the recovery rate.
(3) The complex self-suction design is adopted, the suction volume is easy to float, so that the size of bubbles and other parameters are changed, and the final flotation result is influenced.
(4) The tailings are entrained with a considerable amount of effective minerals which are not removed by the froth flotation of the previous stage, resulting in a certain loss of effective minerals.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel high-efficient efflux flotation device adopts the fluidic mode of multitube to carry out the efflux flotation.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the efficient jet flow flotation machine comprises an ejector, a lower guide pipe and a tank body, wherein the tank body is provided with a tailing discharge hole and a concentrate overflow hole, the bottom of the lower guide pipe is positioned in the tank body, and the discharge hole of the ejector is communicated with at least two lower guide pipes.
As a preferred technical scheme, the bottom of the groove body is hemispherical, at least two discharge holes of the ejector are arranged and are respectively communicated with at least two downcomers, and the downcomers are in one-to-one correspondence with the discharge holes of the ejector.
As a preferred technical scheme, the lower guide pipe is detachably connected with the discharge hole of the ejector.
As a preferred technical scheme, an air inlet of the ejector is connected with an air charging device.
As a preferred technical scheme, the bottom of the trough body is provided with a blocking piece for prolonging the time of the uncaptured effective minerals flowing to the tailing discharge port.
As a preferred technical scheme, the jet flow spread angle of the lower conduit is 3-10 °
As a preferred technical scheme, the bottom of the tank body is of a hemispherical structure protruding downwards and outwards relative to the side wall of the tank body, and the tailings discharging port is located in the center of the hemispherical structure.
As a preferred technical scheme, the lower guide pipe is a horn-shaped lower guide pipe, and a smaller port of the lower guide pipe is connected with the discharge hole of the ejector.
As a preferred technical scheme, the blocking piece is a baffle.
As a preferred technical scheme, the ejector comprises an air cavity, a feeding pipe, a nozzle and a throat pipe, wherein the feeding pipe is positioned in the air cavity, and the throat pipe is communicated with the air cavity; the air cavity is provided with an air inlet, the discharge end of the feeding pipe is connected with at least two nozzles to form a multi-channel pipe structure, each nozzle is communicated with one throat pipe in a one-to-one correspondence mode, and the throat pipes are connected with the lower guide pipes in a one-to-one correspondence mode.
Compared with the prior art, the utility model, it has following technological effect:
(1) The utility model discloses in, the form of liquid mouth is gone into to the list that adopts an ejector of many downcomer cooperations, and the radius of service enlarges in the flotation, and flotation tank does not have the dead angle and can break up the mineral of non-selective reunion easily and reselect, and it is little to have solved single tube radius of service, and the multitube installation degree of difficulty is big, problem that the energy consumption is high.
(2) The utility model discloses in, adopt the hemisphere tank bottom that is equipped with the ladder baffle, can be with the holistic time greatly increased that the effective mineral that is not walked by first stage flotation flows the tailing discharge gate, equivalent effective mineral is stopped by the echelonment barb of tank bottom to can be got up by subsequent foam disturbance and taken away by organic, and invalid mineral is taken away after not taken away many times the disturbance finally through ladder barb outflow tailing discharge gate layer upon layer extrusion.
(3) The utility model discloses in, adopt the downcomer of improvement type loudspeaker form, downcomer exit area is greater than in the sprayer with the choke exit area of downcomer connection for through collision fluid mixture torrent decline, be favorable to the same flotation effect of going into the coarser granule under the air velocity of liquid. Meanwhile, the device is detachably connected with the lower guide pipe, so that the lower guide pipe with different diffusion angles can be replaced by matching with minerals to be floated with different thicknesses.
(4) The active inflatable mode is adopted, the inflation quantity and the inflation speed are easy to control, and the air content rate is further controlled, so that the size of the whole flotation bubbles is controlled, the control of flotation products is facilitated, and the flotation process is more stable.
(5) The whole device is convenient to install, has lower energy consumption than a jet flotation machine with the same number of downcomers, is easy to operate, has high recovery rate, can replace downcomers with different jet diffusion angles, and has the advantages of wider applicable mineral range and the like.
Drawings
Figure 1 is the utility model discloses a high-efficient jet flotation machine structure schematic diagram:
fig. 2 is a schematic view of a jet flotation machine a:
fig. 3 is the schematic view of the structure of the lower duct of the present invention:
fig. 4 is the utility model discloses in, the structural schematic diagram of tank bottom echelonment baffle:
fig. 5 is a top view of the stepped baffle plate at the bottom of the tank.
Wherein the reference numerals are as follows: 1-a feeding pipe, 2-an air chamber, 3-an air inlet, 4-a nozzle, 5-a mixing chamber, 6-a self-oscillation chamber, 7-a choke, 8-a downcomer, 9-a groove body, 10-a step-shaped baffle, 11-a tailing discharge port, 12-a concentrate overflow port and 13-a recovery box.
Detailed Description
The utility model aims to overcome prior art's defect, provide a high-efficient jet flotation machine, it is right to combine the embodiment below the utility model discloses do further detailed description.
Example 1
As shown in fig. 1 to 4, a high efficiency jet flotation machine comprises a tank 9, an ejector, and a downcomer 8.
The eductor comprises a feed tube 1, a nozzle 4, a throat 7, an air chamber 2, and an air inlet 3, as in the prior art. The inlet pipe 1 of vertical setting leads to and is connected with nozzle 4, and nozzle 4 is arranged in air chamber 2, is equipped with the air inlet 3 with air chamber 2 intercommunication on the air chamber 2, and nozzle 4 is towards choke 7, through 7 intercommunication downcomers 8 of choke, and choke 7 communicates with air chamber 2, and downcomers 8 are located the cell body 9. The tank body 9 is provided with a tailing discharge port 11 and a concentrate overflow port 12. The feeding end at the top of the feeding pipe 1 is connected with a feeding device. The concentrate overflow port 12 is communicated with a recovery tank 13.
Different from the prior art, in the embodiment, two lower guide pipes 8 are arranged in the groove body 9, and the number of the throats 7 in the ejector is matched with that of the lower guide pipes 8; the tops of the two downcomers 8 are respectively communicated with the bottoms of the two throats 7, and the tops of the two throats 7 are connected with the shell of the air chamber 2.
The number of the nozzles 4 is also matched with that of the downcomers 8, in the embodiment, two nozzles 4 are also arranged, and the two nozzles 4 are communicated with the feeding pipe 1 to form a three-way structure. An included angle is formed between the two nozzles 4, correspondingly, an included angle is also formed between the two throats 7, and an included angle is also formed between the two downcomers 8. The two nozzles 4 are directed towards the tips of the two throats 7, respectively.
In this embodiment, the throat 7 is a straight tube, and the downcomer 8 is a flared tube; the small diameter port of the flared downcomer 8 is screwed or interference connected to the throat 7 so that the downcomer 8 is removably connected to the injector. An angle (hereinafter, referred to as an angle of the downcomer 8) is formed between an extension line of the downcomer 8 and the throat 7, and the angle is preferably in the range of 5 to 75 °.
The area of the discharge hole at the lower end of the lower guide pipe 8 is larger than that of the discharge hole at the lower end of the throat pipe 7, when the feed liquid passes through the feed hole of the throat pipe 7, the feed liquid is vibrated to collide with the wall of the throat pipe 7 to form a collision wall, and the mixed fluid is reduced in turbulence. In this embodiment, the downcomer 8 and the throat 7 have an inclination angle, compared with a general jet flotation machine without an inclination angle. The inclination of the downcomer 8 reduces the turbulence intensity at the end of the downcomer. Coarse flotation is rather preferred for flotation with a lower turbulence intensity, and therefore favors the flotation effect of coarser particles at the same liquid-in gas-in velocity. Meanwhile, the lower guide pipe 8 is detachably connected with the throat pipe 7, so that the lower guide pipe 8 with different diffusion angles can be replaced by matching with minerals to be floated with different thicknesses.
In this embodiment, the linear distance between the outlet of the nozzle 4 and the top end of the throat 7 (the feeding pipe 1 of the throat 7) is controlled to be 10-30 mm.
In this embodiment, the nozzle 4 has a diameter of 3mm to 500mm, and the mixing chamber 5 has a diameter of 10mm to 1000mm.
In this embodiment, the axis of the downcomer 8 coincides with the axis of the throat 7, and the angle between the axis and the vertical axis of the feed pipe 1 is preferably 10 to 15 °.
In this embodiment, the air chamber 2 is connected to at least two air inlets 3, and the air inlets 3 are connected to the sand pump for active inflation. The active inflatable mode is adopted, the inflation quantity and the inflation speed are easy to control, and further the gas content rate is controlled, so that the size of the whole flotation bubbles is controlled, the control of flotation products is facilitated, and the flotation process is more stable.
Further, in this embodiment, the bottom of the groove 9 is a downward convex semispherical structure, and the height of the groove 9 is 3 to 4 times of the diameter of the bottom of the semispherical groove 9.
The distance between the center of the bottom end of the lower guide pipe 8 (the discharge hole of the lower guide pipe 8) and the bottom of the groove is preferably 0.7-0.9 times of the vertical linear distance between the center of the top end of the lower guide pipe 8 and the plane where the circle center of the air inlet 3 is located.
The tailing discharging port 11 is arranged at the center of the bottom of the tank body 9. The bottom of the tank body 9 is provided with a plurality of annular step-shaped baffles 10, and the annular step-shaped baffles 10 cover the bottom of the whole tank body 9 from the outer circumference of the tank body 9 to a tailing discharge hole 11. The radiuses of the annular step-shaped baffles 10 are reduced from the outer circumferential edge of the groove body 9 to the tailing discharge port 11 at equal intervals, and the intervals are 10mm. The vertical surface of the step baffle forms an included angle of 5-10 degrees with the horizontal surface. And the time of the tailings flowing to the discharge hole is prolonged by using the step baffle.
In this embodiment, the gas-liquid ratio is preferably 0.8 to 1.2. When the slurry at the feed inlet passes through the throat 7 at 17m/s, the air suction amount can be 15-25 m/s, and stable foam size and dynamically balanced slurry liquid level are formed.
The gas is fully mixed with the slurry in a mixing chamber 5 (the mixing chamber 5 refers to the area of an air chamber 2 between the end part of a nozzle 4 and a throat pipe 7), then fully oscillated in a self-oscillation chamber 6 (the self-oscillation chamber 6 refers to the area of the throat pipe 7, which is next to the mixing chamber 5), then the self-turbulence level descends along with the diffusion of a downcomer 8, and the self-turbulence level is uniformly dispersed into grooves in all directions according to the angle of each downcomer 8; the coarse particles which are not easy to capture and easy to lose are blocked on the slightly inclined step baffle plate at the bottom of the tank if not captured after being discharged from the outlet of the downcomer 8, so that the coarse particles are prevented from directly flowing out of a tailing port, and are captured by the foam at the back, and finally, tailings are discharged from a tailing discharge port 11.
If the same-grade raw ore processing capacity of 2000 tons/day is adopted, 5-6 lower guide pipes 8 of a common jet flotation machine are needed. The novel design only needs to increase the included angle between the common axis of the lower guide pipe 8 and the throat pipe 7 and the axis of the feeding pipe 1 (each lower guide pipe 8 can radiate a region with a certain volume. If the included angle is not included, the jet depth and the radial length capable of flotation are influenced by the speed of entering air and entering liquid to a great extent. The tank body has dead zones, the flow field is not uniformly distributed, and the like. And the lower guide pipes 8 with different feeding gas speeds and different diffusion angles can be replaced to adapt to other raw ores with different particle sizes, and meanwhile, the step baffle of the trough body 9 can block the uncaptured coarse particles, so that the coarse particles still have the opportunity to be captured by foam, the waste rate of tailings is lower, and the overall recovery rate is higher.
Two, three or even more downcomers 8 can be adjusted depending on the mineral ore properties, flotation conditions, and the size of the flotation cell. This is most important if the ore requires simultaneous flotation of both coarse and fine particles (because the size and fluid strength requirements for bubbles are different for ores of different thicknesses), it is entirely possible to have different numbers of downcomers 8, for example three, four or even more than ten, different vertical lengths (to control flotation of ores of different depths), different angles of the downcomers 8 (to control fluid flow rate and bubble size), and a plurality of downcomers 8 not necessarily being completely symmetrical to each other (to be configured according to flow field requirements).
According to the above embodiment, alright realize the utility model discloses well. It is worth to say that, on the premise of the above structural design, in order to solve the same technical problem, even if some insubstantial changes or retouching are made in the utility model, the essence of the adopted technical scheme is still the same as the utility model, so it should be in the protection scope of the utility model.

Claims (9)

1. A high-efficiency jet flotation machine comprises an ejector, downcomers and a tank body, wherein the tank body is provided with a tailing discharge hole and a concentrate overflow hole, and the bottom of each downcomer is positioned in the tank body;
the ejector comprises an air cavity, a feeding pipe, a nozzle and a throat pipe, wherein the feeding pipe is positioned in the air cavity, and the throat pipe is communicated with the air cavity; the air cavity is provided with an air inlet, the discharge end of the feeding pipe is connected with at least two nozzles to form a multi-channel pipe structure, each nozzle is communicated with one throat pipe in a one-to-one correspondence mode, and the throat pipes are connected with the lower guide pipes in a one-to-one correspondence mode.
2. The efficient jet flow flotation machine according to claim 1, wherein the bottom of the tank body is hemispherical, at least two discharge ports of the ejector are provided and are respectively communicated with at least two downcomers, and the downcomers are in one-to-one correspondence with the discharge ports of the ejector.
3. A high efficiency jet flotation machine according to any one of claims 1 to 2, wherein the downcomer is removably connected to the outlet of the eductor.
4. A high efficiency jet flotation machine as claimed in claim 1 wherein the air inlet of the eductor is connected to an aeration device.
5. A high efficiency jet flotation machine as claimed in claim 1 wherein the bottom of the tank is provided with a barrier to extend the time of the flow of non-captured usable minerals to the tailings outlet.
6. A high efficiency jet flotation machine according to claim 1, wherein the downcomer has a jet spread angle of 3 to 10 °.
7. The efficient jet flow flotation machine according to claim 5, wherein the bottom of the tank body is of a hemispherical structure protruding downwards and outwards relative to the side wall of the tank body, and the tailings outlet is located in the center of the hemispherical structure.
8. A high efficiency jet flotation machine as claimed in claim 1, wherein the downcomer is a trumpet downcomer with its smaller end connected to the discharge of the eductor.
9. A high efficiency jet flotation machine according to claim 5, wherein the baffle is a baffle.
CN202222682531.6U 2022-10-12 2022-10-12 High-efficient efflux flotation device Active CN218654948U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202222682531.6U CN218654948U (en) 2022-10-12 2022-10-12 High-efficient efflux flotation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222682531.6U CN218654948U (en) 2022-10-12 2022-10-12 High-efficient efflux flotation device

Publications (1)

Publication Number Publication Date
CN218654948U true CN218654948U (en) 2023-03-21

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