CN115041305A - Supersonic jet mineralization microbubble flotation machine - Google Patents
Supersonic jet mineralization microbubble flotation machine Download PDFInfo
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Abstract
The invention belongs to the technical field of coal slime flotation machines, and discloses a supersonic jet mineralization flotation machine which comprises a slurry gas distributor and a plurality of supersonic jet microbubble mineralizers; the slurry-gas distributor is internally provided with a slurry distribution chamber and a gas distribution chamber, the slurry distribution chamber is provided with a main gas inlet pipe and a plurality of gas distribution pipes, and the gas distribution chamber is provided with a main feed inlet and a plurality of feed distribution pipes; the main air inlet pipe and the main feed inlet are respectively connected with the inflation tank and the feed box; the supersonic jet micro-bubble mineralizing device comprises a feeding distribution pipe, one end of the feeding distribution pipe is connected with the feeding distribution pipe, the other end of the feeding distribution pipe is sequentially provided with an ore pulp jet nozzle, a first slurry-gas mixing nozzle, a slurry-gas mixing chamber and a second slurry-gas mixing nozzle, the outlet of the second slurry-gas mixing nozzle is arranged in the lower barrel, and a reflecting bowl is arranged below the outlet of the second slurry-gas mixing nozzle; the space between the ore pulp jet nozzle and the first slurry-gas mixing nozzle is communicated with the feeding distribution pipe through an air supply distribution pipeline. The invention greatly improves the mineralization effect and the flotation efficiency.
Description
Technical Field
The invention belongs to the technical field of coal slime flotation machines, and particularly relates to a supersonic jet mineralization flotation machine.
Background
Froth flotation is a general method for concentrating minerals from fine particle ore pulp, and the conventional flotation technology has higher efficiency in the medium mineral particle size range, and in the upper limit range of the particle size range, the separation effect is poor due to the higher shedding rate of particle bubble combination formed by coarser particles and bubbles, and the recovery rate of coarser particles is lost. Along with the rapid development of economy, the demand of human beings on non-renewable mineral resources is increased year by year, along with the continuous exploitation of resources, the dominant mineral resources are reduced year by year, and the mineral resources which are poor, fine, miscellaneous and the like and are difficult to sort gradually occupy the leading position in the market. Because the useful minerals are embedded with fine granularity, the poor, fine and miscellaneous mineral resources usually need to be ground to fine granularity to achieve effective dissociation of the useful minerals and gangue minerals. When the mineral flotation technology is used for enriching and concentrating the micro-fine mineral, no matter the micro-fine mineral is a mechanical stirring type flotation machine or a flotation column type device, because the micro-fine mineral (such as the granularity of less than 20 microns) is small in mass and low in momentum, the contact collision probability of the mineral particles and the bubbles is reduced, the problem that the mineral particles cannot be effectively adhered to the bubbles due to the fact that the hydration film energy barrier between the mineral particles and the bubbles is difficult to overcome in the flotation process, the mineralization efficiency is low, the flotation rate is reduced, the separation precision is poor, the separation efficiency is low and the like is caused, the treatment efficiency of the traditional flotation technology and the traditional device is gradually lower than the expected level of people, and the traditional flotation technology and the traditional device become a technical bottleneck when the traditional flotation technology and the traditional device are used for treating the poor fine mineral resources.
The jet microbubble flotation is an important technical development direction for strengthening the flotation of fine and micro-fine minerals due to the strong mixing effect and cavitation effect of the ore pulp jet. The core technology of jet-type flotation equipment is usually realized by adopting a jet pump principle, and particularly represented by an Imhoflot aerated flotation machine in Germany and JAMESON CELL in Australia. The German Imhoflot inflatable flotation machine adopts a Venturi jet inflation principle of a combined multi-nozzle pipe, ore pulp is inflated and mineralized and then fed into an inflatable ore pulp distributor connected to the bottom of a lower guide pipe, the inflatable ore pulp distributor is provided with a plurality of upward nozzles, upward gas-solid-liquid three-phase jet flows are formed in a separation groove body, mineralized bubbles are separated from ore pulp flows in the upward movement process in the separation groove body, the mineralized bubbles move upward to form a foam layer at the top of the separation groove, foam concentrate overflows to a concentrate collecting groove, the ore pulp separated from the mineralized bubble flows back to move downward and is discharged from a tailing box connected to the bottom of the separation groove body. Australian JAMESON CELL adopts a mode of parallel arrangement of a plurality of independent mineralizers, each ore pulp nozzle and a lower guide pipe form a set of mineralizer, the mineralizer is inflated by adopting a jet flow principle, air is sucked into the lower guide pipe and is cut into micro bubbles by means of fluid turbulence, the inflated ore pulp is downwards fed into a separation tank body through the lower guide pipe, mineralized bubbles and the ore pulp are separated at the outlet area of the lower guide pipe, the mineralized bubbles move upwards to form a mineralized foam layer at the upper part of the separation tank body, and the ore pulp is discharged from a tailing pipe at the bottom of the separation tank body. Chinese patent "a cavitation jet microbubble flotation machine and cavitation jet bubble generator" (application number 201911031732.6) provides a jet bubble generator with a nozzle and a nozzle combination, wherein fluid is ejected from the nozzle at a high speed to form negative pressure to suck air, the air is dispersed into small bubbles in the nozzle by means of high-speed turbulent motion of the fluid, and the dispersion and mixing of the gas and the liquid are further strengthened after the secondary ejection of the fluid through the nozzle. However, when the diameter of the nozzle is larger, the jet bubble generator forms a liquid jet core in the center of the jet flow beam, which affects the dispersion and mixing efficiency of the sucked air and the jet fluid and affects the particle bubble mineralization effect. The Chinese patent 'a mixed flow type microbubble generator and bubble distributor' (application number 201821730868.7) sets up helical blade in the output tube Chinese patent 'self priming type microbubble generator' (utility model CN95239169.4) sets up static stirring blade in the output tube, above-mentioned scheme all has better fine grain and fine particle flotation effect, but when the mineral granularity of handling is less than 20 microns, (for example when selecting super pure carbon from the coal slime usually, need levigate the coal to several micron particle levels), the required hydromechanical condition of super fine particle and bubble mineralization still can not be satisfied to its mixing strength of flotation equipment based on conventional jet technology and the granule bubble collision condition that provides, still has the mineralization, mineralize inefficiency, the problem of sorting precision difference.
By carefully analyzing the jet-type micro-bubble mineralizer, the jet-type micro-bubble mineralizer is mainly in the form of pressurized liquid-solid two-phase flow jet, the liquid-solid two-phase flow fluid power is used for sucking gas, the driving forces of liquid-gas mixing and dispersing, particle bubble mineralization and the like are limited by the gas suction capacity of the liquid-solid two-phase flow jet, a limited gas-liquid ratio range exists, the operation range is narrow, particularly when the solid-phase particle concentration of the injected liquid-solid two-phase flow is high, the gas injection capacity is further limited, the dispersion degree of a gas phase in the liquid-solid two-phase flow is low, and the particle bubble mineralization efficiency and the flotation capacity are greatly reduced.
Disclosure of Invention
In order to further enhance the separation efficiency of ultrafine particle flotation and improve the mineralization efficiency and flotation capacity of the flotation machine, the invention provides the supersonic jet mineralization flotation machine.
In order to solve the technical problems, the invention adopts the technical scheme that: a supersonic jet mineralization flotation machine comprises a slurry gas distributor, an upper barrel body, a lower barrel body, an aeration tank and a plurality of supersonic jet micro-bubble mineralization devices;
an internal partition plate is arranged in the slurry-gas distributor, the internal partition plate divides the interior of the slurry-gas distributor into a slurry distribution chamber and a gas distribution chamber, a main gas inlet pipe and a plurality of gas distribution pipes are arranged on the slurry-gas distributor at positions corresponding to the slurry distribution chamber, and a main feed inlet and a plurality of feed distribution pipes are arranged on the slurry-gas distributor at positions corresponding to the gas distribution chamber; the main air inlet pipe is connected with an inflation tank, and the main feed inlet is connected with a feed box;
the supersonic jet micro-bubble mineralizing device comprises a feeding distribution pipe, one end of the feeding distribution pipe is connected with the feeding distribution pipe, the other end of the feeding distribution pipe is connected with an ore pulp jet nozzle, a first slurry-gas mixing nozzle is arranged at the outlet of the ore pulp jet nozzle, a slurry-gas mixing chamber is arranged at the outlet of the first slurry-gas mixing nozzle, a second slurry-gas mixing nozzle is arranged at the outlet of the slurry-gas mixing chamber, the outlet of the second slurry-gas mixing nozzle is arranged in the lower barrel, and a reflecting bowl is arranged below the outlet of the second slurry-gas mixing nozzle; a gas-liquid mixing space is formed between the ore pulp jet nozzle and the first slurry-gas mixing nozzle;
and the supersonic jet flow micro bubble mineralizing device is also provided with an air supply distribution pipeline, one end of the air supply distribution pipeline is communicated with the feeding distribution pipe, and the other end of the air supply distribution pipeline is communicated with the air-liquid mixing space.
The diameter of an outlet of the second slurry-gas mixing nozzle is 10-50% of the diameter of the slurry-gas mixing chamber, and the gas-liquid two-phase jet flow speed c at the outlet of the second slurry-gas mixing nozzle meets the following requirements:
c≥SQR((Pδ/ρ L )(1+1/δ) 2 )；
wherein, delta is the gas-liquid volume ratio, P is the pressure, rho L SQR represents the square of the square opening for fluid density.
The ore pulp jet nozzle is a nozzle with a gradually reduced inner diameter, and the first slurry-gas mixing nozzle comprises a first nozzle section with a gradually reduced inner diameter, a second nozzle section with a constant inner diameter, a reducing section and a sizing section.
The reflection bowl is fixedly connected with the supersonic jet microbubble mineralization device through a connecting piece.
The lower barrel body comprises a barrel part and an inverted round table part, the barrel part is located above the inverted round table part, the inverted round table part is in the shape of a barrel with the same diameter as the upper barrel body, the inverted round table part is in the shape of an inverted round table, and a reflection round table is arranged at the bottom of the inverted round table part.
The total feed inlet is arranged at the bottom of the slurry gas distributor, and the centers of the lower barrel body and the upper barrel body are provided with a feeding pipe connected with the total feed inlet.
A supersonic speed efflux mineralize mineralization flotation device, the barrel includes barrel portion, hang plate subassembly and branch workbin down, barrel portion is the cask form the same with last staving diameter, barrel portion bottom periphery sets up closed bottom plate, closed bottom plate go up with the rigidity that the thick liquid gas mixing nozzle corresponds is provided with the reflection alms bowl, closed bottom plate center is provided with the hang plate subassembly, hang plate subassembly top communicates with each other with last staving, and the bottom communicates with each other with the branch workbin.
The supersonic jet mineralization flotation machine further comprises a circulating pipe arranged on the lower barrel body, one end of the circulating pipe is communicated with a circulating ore pulp outlet on the lower barrel body, and the other end of the circulating pipe is communicated with the feeding box.
The supersonic jet mineralization flotation machine adjusts the ratio of fresh ore pulp to circulating ore pulp through the feeding box, and further adjusts the recovery rate and grade of concentrate.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a supersonic jet mineralization flotation machine, which is an ultrafine particle bubble mineralization generator based on a gas-liquid two-phase flow supersonic jet principle, generates fluid dynamics conditions required by particle bubble collision mineralization in flotation equipment, and utilizes the shock wave effect generated by the supersonic jet and the collision between the supersonic jet and an obstacle to strengthen the interaction of a gas-liquid interface, a gas-solid interface and a liquid-liquid interface and the hydrodynamic mixing of gas-liquid-solid three phases, thereby achieving the purposes of improving the probability of collision mineralization of ultrafine particles and bubbles and further improving the separation efficiency of ultrafine particle flotation, providing a wider range of gas-liquid ratio for flotation operation, and adapting to the flotation process of high-concentration ore pulp.
Drawings
FIG. 1 is a schematic structural diagram of a supersonic jet mineralization flotation machine provided in one embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a supersonic jet microbubble mineralizer according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a slurry gas distributor according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a supersonic jet mineralization flotation machine provided in the second embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a supersonic jet microbubble mineralizer according to a second embodiment of the present invention;
FIG. 6 is a schematic view of a slurry gas distributor according to a second embodiment of the present invention;
in the figure: the device comprises a slurry gas distributor 1, a supersonic jet micro-bubble mineralizer 2, an upper barrel body 3, a concentrate overflow tank 5, a rectification sieve plate 6, a tailing pipe 8, a tailing adjusting box 9, a tailing adjusting box 10, an operation platform 11, a reflection circular table 11, a lower barrel body 12, a circulation pipe 13, a reflection pot 14, an inclined plate assembly 15, a material separating box 17, a bubble pushing cone 18, a material feeding pipe 19, a material feeding box 20, a material feeding pump 21, an air charging tank 22 and a closed bottom plate 23, wherein the supersonic jet micro-bubble mineralizer is arranged on the upper barrel body;
1-1 is a main feed inlet, 1-2 is a main gas inlet pipe, 1-3 is a gas distribution pipe, 1-4 is a shell, 1-5 is a feed distribution pipe, 1-6 is an internal partition plate, and 1-7 is a bottom seal plate;
2-1 is a feeding distribution pipe, 2-2 is pressurized ore pulp, 2-4 is an ore pulp jet nozzle, 2-5 is a first slurry-gas mixing nozzle, 2-6 is a slurry-gas mixture, 2-7 is a slurry-gas mixing chamber, 2-8 is a second slurry-gas mixing nozzle, 2-9 is a nozzle outlet, 2-11 is a connecting piece, 2-12 is a fixing part, 2-13 is an air supply distribution pipeline, and 2-14 is an air check valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, a supersonic jet mineralization flotation machine according to an embodiment of the present invention includes a slurry gas distributor 1, an upper tank 3, a lower tank 12, an aeration tank 22, and a plurality of supersonic jet micro-bubble mineralization devices 2. A concentrate overflow trough 5 is arranged above the upper barrel body 3, the lower barrel body 12 is arranged below the upper barrel body 3, and a circulating pipe 13 and a tailing pipe 8 are arranged on the lower barrel body 12. One end of the circulating pipe 13 is communicated with a circulating ore pulp outlet of the lower barrel body, and the other end is communicated with the feeding box 20.
As shown in fig. 2, in this embodiment, an internal partition plate 1-6 is disposed inside the slurry distributor 2, the internal partition plate 1-6 divides the inside of the slurry distributor 2 into a slurry distribution chamber and a gas distribution chamber, a main gas inlet pipe 1-2 and a plurality of gas distribution pipes 1-3 are disposed on the slurry distributor 2 at positions corresponding to the slurry distribution chamber, and a main feed inlet 1-1 and a plurality of feed distribution pipes 1-5 are disposed on the slurry distributor 2 at positions corresponding to the gas distribution chamber; the main air inlet pipe 1-2 is connected with an inflation tank 22, and the main feed inlet 1-1 is connected with a feed pipe; the total feed port 1-1 is provided at the bottom center of the slurry gas distributor 2. In this embodiment, the total feed port 1-1 is disposed at the bottom of the slurry-gas distributor 2, the center of the lower barrel body 12 and the center of the upper barrel body 3 are provided with a feeding pipe connected with the total feed port 1-1, and the total feed port 1-1 passes through the gas distribution chamber and is communicated with the slurry distribution chamber.
As shown in fig. 3, in this embodiment, the supersonic jet micro-bubble mineralization device 2 includes a feed distribution pipe 2-1 having one end connected to the feed distribution pipe 1-5, the other end of the feed distribution pipe 2-1 is connected to an ore slurry jet nozzle 2-4, an outlet of the ore slurry jet nozzle 2-4 is provided with a first slurry-gas mixing nozzle 2-5, an outlet of the first slurry-gas mixing nozzle 2-5 is provided with a slurry-gas mixing chamber 2-7, an outlet of the slurry-gas mixing chamber 2-7 is provided with a second slurry-gas mixing nozzle 2-8, an outlet of the second slurry-gas mixing nozzle 2-8 is disposed in the lower barrel body 3, and a reflection bowl 14 is disposed below the outlet; the reflection bowl 14 is fixedly connected with the supersonic jet microbubble mineralizer 2 through connecting pieces 2-11. The connecting pieces 2-11 can be rod-shaped connecting structures such as angle iron, steel plate strips, thick steel strips and the like.
The supersonic jet flow micro bubble mineralizing device 2 is also provided with an air supply distribution pipeline 2-13, one end of the air supply distribution pipeline 2-13 is communicated with the feeding distribution pipeline 1-5, and the other end of the air supply distribution pipeline is communicated with a gas-liquid mixing space between the ore pulp jet flow nozzle 2-4 and the first slurry-gas mixing nozzle 2-5; in addition, the gas supply distribution pipeline 2-13 is also provided with a gas check valve 2-14. The outer side of the slurry-gas mixing chamber 2-7 is provided with a fixing part 2-12, the supersonic jet flow micro-bubble mineralizer 2 is fixedly arranged on the platform 10 through the fixing part 2-12, the slurry-gas distributor 1 is also fixedly arranged on the platform 10, and the supersonic jet flow micro-bubble mineralizer 2 is circumferentially distributed around the slurry-gas distributor 1.
Specifically, as shown in fig. 3, the pulp jet nozzle 2-4 is a nozzle with a gradually decreasing inner diameter, and the first slurry-air mixing nozzle 2-5 includes a first nozzle section with a gradually decreasing inner diameter and a second nozzle section with a constant inner diameter, the first nozzle section is arranged at one end close to the pulp jet nozzle 2-4, and the inner diameter of the second nozzle section is the same as the minimum inner diameter of the first nozzle section.
In this embodiment, the working principle of the supersonic jet microbubble mineralization 2 is as follows: pressurized ore pulp 2-2 enters an ore pulp jet flow nozzle 2-4 through a feeding distribution pipe 2-1 to form ore pulp jet flow, pressurized gas is introduced into a space formed by the ore pulp jet flow nozzle 2-4 and a first slurry-gas mixing nozzle 2-5 through a gas supply distribution pipeline 2-13 and a gas check valve 2-14, then a primarily mixed slurry-gas mixture 2-6 is formed after jet flow mixing through the first slurry-gas mixing nozzle 2-5 and enters a slurry-gas mixing chamber 2-7, and the pressurized slurry-gas mixture 2-6 forms gas-liquid two-phase supersonic jet at a nozzle outlet 2-9 due to the contraction and flow-blocking effect of a second slurry-gas mixing nozzle 2-8.
Specifically, in this embodiment, the diameter of the outlet of the second slurry-gas mixing nozzle 2-8 is 10-50% of the diameter of the slurry-gas mixing chamber 2-7, and in order to form an effective gas-liquid two-phase supersonic jet, the gas-liquid two-phase jet flow velocity c at the outlet of the second slurry-gas mixing nozzle 2-8 satisfies:
c≥SQR((Pδ/ρ L )(1+1/δ) 2 )； (1)
wherein, delta is the gas-liquid volume ratio, p is the pressure, rho L SQR represents the square of the square opening for fluid density.
The shock wave generated by the supersonic jet generates a great change of local pressure, so that the diameter of the bubbles is reduced sharply and the bubbles are dispersed in the fluid uniformly, and the process has three particle bubbles contacting the mineralization area from the aspect of flotation analysis: the jet flow output by the first slurry-gas mixing nozzle 2-5 enters a slurry-gas mixing chamber 2-7 to generate first particle bubble mixing mineralization; the contraction and flow resistance of the second slurry-gas mixing nozzle 2-8 generates shock wave jet flow at the nozzle outlet 2-9, so that energy gradient difference and torsional tension are generated among different density components, and particle bubbles caused by high-intensity cavitation effect are formed to mineralize to form supersonic shock jet flow; the high intensity vortex generated by the impact collision of the supersonic impact jet and the reflection bowl 14 further enhances the particle bubble collision mineralization. Therefore, the hydrophobic ultrafine particles are strongly attached to the surface of the air bubble to complete the selective collecting process of the ultrafine particles.
Specifically, in this embodiment, lower barrel body 12 includes the round barrel portion that is located the top and the radius platform portion that is located the below, round barrel portion is the same cask form with upper barrel body 3 diameter, radius platform portion is radius platform form, radius platform portion bottom is provided with reflection round platform 11. The circulation pipe 13 and the tailing pipe 8 are disposed on an inverted circular table portion. In addition, a rectifying sieve plate 6 is arranged between the upper barrel body 3 and the lower barrel body 12.
The working principle of the embodiment is as follows: when the device works, the fed ore pulp is modulated by an ore pulp preparer and then fed into a feed box 20, is pressurized by a feed pump 21, enters an ore pulp distribution chamber of the intensive type slurry-gas distributor 1 through a feed pipe 19 and a feed pipe 1-1, and is uniformly distributed to feed distribution pipes 2-1 of the Google supersonic jet micro-bubble mineralizer 2 through a plurality of feed distribution pipes 1-5 arranged on the ore pulp distribution chamber. Compressed air is buffered by the charging tank 22 and then is connected with the main air inlet pipe 1-2 by a pipeline to enter the air distribution chamber at the lower part of the intensive slurry air distributor 1, and then is uniformly distributed to the air supply distribution pipelines 2-13 of the supersonic jet micro-bubble mineralizer 2 by each air distribution pipe 1-3 arranged around the lower air distribution chamber. After the coal slurry is aerated and mineralized by the supersonic jet microbubble mineralizer 2, clean coal is adhered to bubbles and floats upwards to an overflow weir in the upper barrel body 3 through the rectifying sieve plate 6, automatically flows into the concentrate overflow trough 5 to enter the next concentrate foam treatment process, unmineralized ore slurry flows downwards to enter the lower barrel body 12 in the shape of a circular cone frustum, one part of the unmineralized ore slurry enters the feeding box for circular recleaning through the circulating pipe 13 in an annular space formed by the outer wall of the lower barrel body 12 and the reflecting circular truncated cone 11, and the other part of the unmineralized ore slurry is discharged as tailings through the tailing pipe 8 and the tailing adjusting box 9 to enter the next operation process. In the embodiment, 100% of the fresh ore pulp and the tailing selective circulating ore pulp enter the supersonic jet flow micro-bubble mineralizing device through the pulp gas distributor 1, and the ratio of the fresh ore pulp to the circulating ore pulp is adjusted through the feeding box 20, so that the recovery rate and the grade of the concentrate can be adjusted.
Example two
As shown in fig. 4, the present embodiment of the invention also includes a slurry gas distributor 1, an upper tank 3, a lower tank 12, an aeration tank 22 and a plurality of supersonic jet micro bubble mineralizers 2 according to the embodiment of claim 1. A concentrate overflow trough 5 is arranged above the upper barrel body 3, the lower barrel body 12 is arranged below the upper barrel body 3, and a circulating pipe 13 and a tailing pipe 8 are arranged on the lower barrel body 12.
As shown in fig. 5, in the present embodiment, an internal partition plate 1-6 is disposed inside the slurry distributor 2, the internal partition plate 1-6 divides the inside of the slurry distributor 2 into a slurry distribution chamber and a gas distribution chamber, a main inlet pipe 1-2 and a plurality of gas distribution pipes 1-3 are disposed on the slurry distributor 2 at positions corresponding to the slurry distribution chamber, and a main inlet port 1-1 and a plurality of inlet distribution pipes 1-5 are disposed on the slurry distributor 2 at positions corresponding to the gas distribution chamber; the main air inlet pipe 1-2 is connected with an inflation tank 22, and the main feed inlet 1-1 is connected with a feed pipe; unlike the first embodiment, in which the total feed inlet 1-1 is located at the top of the slurry-gas distributor 2, centrally above, the slurry distribution chamber is located above the gas distribution chamber.
As shown in fig. 6, in this embodiment, the structure of the supersonic jet micro-bubble mineralization device 2 is substantially the same as that of the first embodiment, and it includes a feed distribution pipe 2-1 having one end connected to the feed distribution pipe 1-5, the other end of the feed distribution pipe 2-1 being connected to an ore pulp jet nozzle 2-4, a first slurry-gas mixing nozzle 2-5 is provided at an outlet of the ore pulp jet nozzle 2-4, a slurry-gas mixing chamber 2-7 is provided at an outlet of the first slurry-gas mixing nozzle 2-5, a second slurry-gas mixing nozzle 2-8 is provided at an outlet of the slurry-gas mixing chamber 2-7, an outlet of the second slurry-gas mixing nozzle 2-8 is provided in the lower barrel body 3, and a reflection bowl 14 is provided below the outlet; the main feed port 1-1 is arranged at the bottom of the slurry gas distributor 2, and the centers of the lower barrel body 12 and the upper barrel body 3 are provided with a feeding pipe connected with the main feed port 1-1. The supersonic jet flow micro bubble mineralizing device 2 is also provided with an air supply distribution pipeline 2-13, one end of the air supply distribution pipeline 2-13 is communicated with the feeding distribution pipeline 1-5, and the other end of the air supply distribution pipeline is communicated with the space between the ore pulp jet flow nozzle 2-4 and the first slurry gas mixing nozzle 2-5; in addition, the gas supply distribution pipeline 2-13 is also provided with a gas check valve 2-14. The outer side of the slurry-gas mixing chamber 2-7 is provided with a fixing part 2-12, the supersonic jet micro-bubble mineralization device 2 is fixedly arranged on the platform 10 through the fixing part 2-12, the slurry-gas distributor 1 is also fixedly arranged on the platform 10, and the supersonic jet micro-bubble mineralization device 2 is circumferentially distributed around the slurry-gas distributor 1.
Unlike the first embodiment, in the present embodiment, the reflector bowl 14 is fixedly disposed in the lower barrel.
Specifically, as shown in fig. 4, in this embodiment, the lower barrel body 12 includes a barrel portion, an inclined plate assembly 15 and a distribution box 17, the barrel portion is a barrel shape with the same diameter as the upper barrel body 3, a closed bottom plate 23 is arranged on the periphery of the bottom of the barrel portion, a reflection bowl 14 is fixedly arranged on the closed bottom plate 23 at a position corresponding to the slurry-gas mixing nozzles 2 to 9, the inclined plate assembly 15 is connected to the center of the closed bottom plate, the distribution box 17 is arranged at the bottom of the inclined plate assembly 15, the distribution box 17 is communicated with the bottom of the inclined plate assembly 15, and the tailing pipe 8 and the circulating pipe 13 are arranged on the distribution box 17. The tailing pipe 8 is arranged on the side wall of the inclined plate assembly 15, and the circulating pipe 13 is arranged at the bottom of the material distributing box 17. One end of the circulating pipe 13 is communicated with the circulating ore pulp outlet of the lower barrel body, and the other end is communicated with the feeding box 20.
The working principle of the embodiment is as follows: when the device works, fed ore pulp is mixed with a medicament through an ore pulp preparer and then fed into a feed box 21, then the mixture is pressurized by a feed pump 21 and then fed into an ore pulp distribution chamber of a slurry gas distributor 1 from a feed distribution pipe 2-1 above the feed box, and the mixture is uniformly distributed to the feed distribution pipes 2-1 of a plurality of supersonic jet micro-bubble mineralizers 2 through feed distribution pipes 1-5 which are annularly arranged on the periphery of the feed distribution pipes. Compressed air is buffered by an aeration tank 22 and then is connected with a main air inlet pipe 1-2 by a pipeline to enter a gas distribution chamber at the lower part of the intensive slurry gas distributor 1, and then is uniformly distributed to a plurality of air supply distribution pipelines 2-13 of the supersonic jet micro-bubble mineralizer 2 by a plurality of gas distribution pipes 1-3 arranged around the lower gas distribution chamber; the coal slurry is aerated and mineralized by the supersonic jet microbubble mineralizer 2 to form supersonic impact jet and enters the lower barrel body 2, and the high-intensity vortex generated by impact collision with the reflecting bowl 14 in the lower barrel body 2 further enhances the particle bubble collision mineralization. Then, clean coal is adhered to bubbles and floats upwards in the upper barrel body 3 to an overflow weir through a rectifying sieve plate, automatically flows into a concentrate overflow trough 5 to enter the next concentrate foam treatment process, unmineralized ore pulp flows downwards to enter an inclined plate assembly 15, the mineralized bubbles and the ore pulp are further separated in the inclined plate assembly 15 and then enter a material distribution box 17, coarse particles return to a feeding box for circular re-separation through a circulating material pipe 13, and the rest are discharged as tailings through a tailing pipe 8 and a tailing adjusting box 9 which are communicated with the inclined plate assembly 15 to enter the next operation process.
In conclusion, the invention provides a supersonic jet mineralization flotation machine, which is based on a supersonic jet microbubble mineralization device to realize ore pulp mineralization, utilizes compressed air to mix slurry and gas, reduces the injection pressure of the ore pulp, forms pressurized gas-liquid two-phase flow in a guide pipe slurry-gas mixing chamber depending on the pressure provided by the air, is additionally provided with a contraction type second slurry-gas mixing nozzle at the bottom of the slurry-gas mixing chamber, forms high-speed gas-liquid two-phase jet at an outlet of the slurry-gas mixing chamber, forms supersonic jet when the speed reaches above c, and further strengthens the collision mineralization of particle bubbles, greatly improves the mineralization effect, has obvious mineralization effect on ultrafine particles with the particle size of less than 20 microns, and therefore improves the flotation efficiency of the flotation machine. In addition, the invention provides pressure by compressed air, can reduce the pressure of ore pulp jet flow, achieves the energy-saving effect and enables the mineralizer to have wider gas-liquid operation range.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A supersonic jet mineralization flotation machine is characterized by comprising a slurry gas distributor (1), an upper barrel body (3), a lower barrel body (12), an aeration tank (22) and a plurality of supersonic jet micro-bubble mineralization devices (2);
an internal partition plate (1-6) is arranged in the slurry gas distributor (2), the internal partition plate (1-6) divides the interior of the slurry gas distributor (2) into a slurry distribution chamber and a gas distribution chamber, a main gas inlet pipe (1-2) and a plurality of gas distribution pipes (1-3) are arranged on the slurry gas distributor (2) at positions corresponding to the slurry distribution chamber, and a main feed inlet (1-1) and a plurality of feed distribution pipes (1-5) are arranged on the slurry gas distributor (2) at positions corresponding to the gas distribution chamber; the main air inlet pipe (1-2) is connected with an inflation tank (22), and the main feed inlet (1-1) is connected with a feed box (20);
the supersonic jet micro-bubble mineralization device (2) comprises a feeding distribution pipe (2-1) with one end connected with the feeding distribution pipe (1-5), the other end of the feeding distribution pipe (2-1) is connected with an ore pulp jet nozzle (2-4), a first slurry-gas mixing nozzle (2-5) is arranged at the outlet of the ore pulp jet nozzle (2-4), a slurry-gas mixing chamber (2-7) is arranged at the outlet of the first slurry-gas mixing nozzle (2-5), a second slurry-gas mixing nozzle (2-8) is arranged at the outlet of the slurry-gas mixing chamber (2-7), the outlet of the second slurry-gas mixing nozzle (2-8) is arranged in the lower barrel body (3), and a reflection bowl (14) is arranged below the outlet; a gas-liquid mixing space is formed between the ore pulp jet nozzle (2-4) and the first slurry-gas mixing nozzle (2-5);
and the supersonic jet flow micro-bubble mineralizing device (2) is also provided with an air supply distribution pipeline (2-13), one end of the air supply distribution pipeline (2-13) is communicated with the feeding distribution pipeline (1-5), and the other end of the air supply distribution pipeline is communicated with a gas-liquid mixing space.
2. The supersonic jet mineralization flotation machine according to claim 1, wherein the diameter of the outlet of the second slurry-gas mixing nozzle (2-8) is 10-50% of the diameter of the slurry-gas mixing chamber (2-7), and the gas-liquid two-phase jet flow velocity c at the outlet satisfies:
c≥SQR((Pδ/ρ L )(1+1/δ) 2 )；
wherein, delta is the gas-liquid volume ratio, P is the pressure, rho L SQR represents the square-on for the fluid density.
3. A supersonic jet mineralization flotation machine according to claim 1, characterized in that the slurry jet nozzles (2-4) are nozzles with gradually decreasing inner diameter, and the first slurry-gas mixing nozzle (2-5) comprises a first nozzle section with gradually decreasing inner diameter and a second nozzle section with constant inner diameter, a reducing section and a sizing section.
4. A supersonic jet mineralization flotation machine according to claim 1, characterized in that the reflection bowl (14) is fixedly connected to the supersonic jet micro-bubble mineralization device (2) by means of a connection (2-11).
5. The supersonic jet mineralization flotation machine according to claim 1, wherein the lower barrel body (12) comprises an upper barrel part and a lower inverted circular truncated part, the upper barrel part is in a cylindrical shape with the same diameter as the upper barrel body (3), the inverted circular truncated part is in an inverted circular truncated shape, and a reflection circular truncated cone (11) is arranged at the bottom of the inverted circular truncated part.
6. A supersonic jet mineralization flotation machine according to claim 5, wherein the total feed inlet (1-1) is arranged at the bottom of the slurry gas distributor (2), and the lower barrel body (12) and the upper barrel body (3) are centrally provided with a feeding pipe connected with the total feed inlet (1-1).
7. The supersonic jet mineralization flotation machine according to claim 1, wherein the lower barrel body (12) comprises a barrel part, an inclined plate assembly (15) and a material distribution box (17), the barrel part is in a barrel shape with the same diameter as the upper barrel body (3), a closed bottom plate (23) is arranged on the periphery of the bottom of the barrel part, a reflection bowl (14) is fixedly arranged on the closed bottom plate (23) corresponding to the slurry-gas mixing nozzles (2-9), the inclined plate assembly (15) is arranged in the center of the closed bottom plate, the top of the inclined plate assembly (15) is communicated with the upper barrel body (3), and the bottom of the inclined plate assembly is communicated with the material distribution box (17).
8. The supersonic jet mineralization flotation machine according to claim 1, further comprising a circulation pipe (13) disposed on the lower tank body (2), wherein one end of the circulation pipe (13) is communicated with a circulation pulp outlet on the lower tank body (2), and the other end is communicated with the feed tank (20).
9. The supersonic jet mineralization flotation machine of claim 8, wherein the ratio of fresh pulp to recycled pulp is adjusted by bin feed adjustment to adjust concentrate recovery and grade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210634314.1A CN115041305A (en) | 2022-06-07 | 2022-06-07 | Supersonic jet mineralization microbubble flotation machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210634314.1A CN115041305A (en) | 2022-06-07 | 2022-06-07 | Supersonic jet mineralization microbubble flotation machine |
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| CN115041305A true CN115041305A (en) | 2022-09-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210634314.1A Pending CN115041305A (en) | 2022-06-07 | 2022-06-07 | Supersonic jet mineralization microbubble flotation machine |
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| Country | Link |
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| CN (1) | CN115041305A (en) |
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2022
- 2022-06-07 CN CN202210634314.1A patent/CN115041305A/en active Pending
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