NL2025747B1

NL2025747B1 - Spray atomizing device and floatation device with same

Info

Publication number: NL2025747B1
Application number: NL2025747A
Authority: NL
Inventors: Zhu Jinbo; Wang Chao; Zhou Wei; Zhu Hongzheng
Original assignee: Univ Anhui Sci & Technology
Priority date: 2020-05-14
Filing date: 2020-06-03
Publication date: 2021-03-30
Also published as: CN111570099B; CN111570099A

Abstract

The present invention discloses a spray atomizing device and a floatation device with the spray atomizing device. The floatation device includes the spray atomizing device, and also includes a double-linked-wheel spray stirring mechanism and a shear emulsifying device. The spray atomizing device includes an atomizing cylinder, a rotating shaft, laminar flow guide discs, a conical guide hood and a guide hood base plate. The double-linked-wheel spray stirring mechanism includes a floatation tank, a supporting frame, a pre-treatment cabin, a rotary connecting rod, a driving impeller, a stirring impeller, a guide cylinder, and a circulating pump. The shear emulsifying device includes an emulsifying tank, a chemical spray nozzle, fixed fluted discs, rotary fluted discs and a speed compensation motor. The present invention integrates the functions of atomizing a foaming agent, emulsifying a capturing agent, pre-mixing pulp and floatation selecting, thereby greatly reducing the volume and floor occupation area of the spray atomizing device. Moreover, the energy consumption for pumping ore pulp can be reduced. The spray atomizing device has the functions of atomizing the foaming agent, emulsifying the capturing agent, spraying, sucking air, driving, stirring and floatation selecting, thereby improving the mineral separation efficiency.

Description

SPRAY ATOMIZING DEVICE AND FLOATATION DEVICE WITH SAME Technical Field The present invention relates to the technical field of manufacturing of mineral machinery, in particular to the technical field of mineral separation, and more particularly relates to a spray atomizing device and a floatation device with same. Background Floatation, i.e., foam floatation, refers to the use of a surface-active agent-foaming agent capable of generating a great amount of bubbles. When air is introduced into water or air enters the water by stirring the water, a hydrophobic end of the surface-active agent is oriented towards the air side of a bubble at a gas-liquid interface, and a hydrophilic end is still in the solution, thereby forming the bubbles. Another surface-active agent (generally a cationic surface-active agent also includes aliphatic amine) having a capturing effect is absorbed on the surface of solid mineral powder. The adsorption has certain selectivity according to different properties of minerals. The basic principle of the adsorption is to use lattice defects on surfaces of crystals, and the outer hydrophobic end is partially inserted into the bubbles, so that in a flotation process, the bubbles may bring away the specified mineral powder to achieve a purpose of mineral separation.

However, in the prior art, generally the surface-active agent-foaming agent is directly stirred in the ore pulp, and the surface-active agent-foaming agent cannot be fully scattered. Moreover, a formed micro-bubble system is unstable and cannot be more uniformly mixed with floated minerals, and the floatation effect is poor.

Therefore, how to provide a spray atomizing device capable of fully atomizing the surface-active agent-foaming agent to form the stable micro-bubble system and ensuring the sufficient mixing of the surface-active agent-foaming agent and the floated minerals is a problem to be urgently solved by the those skilled in the art.

Summary In view of this, the present invention provides a spray atomizing device capable of fully atomizing a surface-active agent-foaming agent to form a stable micro-bubble system and ensuring the sufficient mixing of the surface-active agent-foaming agent with floated minerals.

In order to realize the above purpose, the present invention adopts the following technical solution: a spray atomizing device includes an atomizing cylinder, a rotating shaft, laminar flow guide discs and an atomizing turn plate. The upper end of the atomizing cylinder is provided with a close cover. The rotating shaft is disposed in the atomizing cylinder along an axial direction of the atomizing cylinder, and the upper end of the rotating shaft is rotatably connected with the close cover.

The laminar flow guide discs are divided into a plurality of layers and are provided with mounting holes in the middle part. A plurality of laminar flow guide discs are fixedly sleeved on the rotating shaft at intervals and are provided with drainage holes. A shear driving layer is formed between two adjacent layers of laminar flow guide discs.

Spray distributing pipes are disposed on positions, corresponding to the shear driving layers, of the side wall of the atomizing cylinder. A solution sprayed by the spray distributing pipes drives the laminar flow guide discs to rotate. The atomizing turn plate has a material discharging inlet and an atomization outlet. The material discharging inlet is fixed on the lower end of the laminar flow guide disc fixed on the lowermost end in the atomizing cylinder, and the side wall of the material discharging inlet corresponds to the outer side wall of the drainage hole.

The shear driving layers are formed among the laminar flow guide discs of the present invention. The spray distributing pipes distribute the sprayed solution, i.e. the surface-active agent-foaming agent, and then the sprayed surface-active agent-foaming agent drives the laminar flow guide discs to play a role of scattering and atomization again. By virtue of the interaction between the atomized foaming agent and bubbles, the surface-active agent-foaming agent is atomized at first before contacting the air, so that the broken bubbles are in an atmosphere of inhibiting the conglomeration, and the stability of the micro-bubble system is kept. Meanwhile, through the shearing and turbulent mixing, the micro-bubble system is more balanced, and an opportunity of full contact is provided to the high-efficiency mineralization of the surface-active agent-foaming agent, thereby greatly improving the mineralization efficiency, and improving the floatation effect.

Further, the close cover includes a bearing sleeve and a sealing cover, and the bearing sleeve is fastened to the upper end of the atomizing cylinder through a bolt. The sealing cover is fastened to the upper end of the bearing sleeve through a bolt. An outer ring of the bearing is fixed on the inner wall of the bearing sleeve. The upper end of the rotating shaft is fixed on an inner ring of the bearing.

Further, the bearings are two parallel bearings. The two bearings are spaced and positioned by a convex ring a formed by inwardly extending the middle portion of the inner wall of the bearing sleeve. The lower end of the bearing is clamped and positioned by a top ring a formed by inwardly extending the lower end of the inner wall of the bearing sleeve.

By adopting the above technical solution, the two bearings are clamped and embedded in the bearing sleeve and are limited by the convex ring a and the top ring a not to move when the whole body rotates, thereby ensuring the rotating stability of the rotating shaft.

Further, the spray distributing pipes are divided into a plurality of groups. Longitudinal sections of the plurality of spray distributing pipes of each group are distributed on the wall of the atomizing cylinder in a fan shape and are gradually increased towards the shear driving layer.

Further, an outer edge of each laminar flow guide disc is set in a conical shape, so that the spray distributing pipes can distribute the surface-active agent-foaming agent more smoothly into the laminar flow guide discs.

Preferably, the laminar flow guide discs are made of a high-strength alloy steel plate, and the surface roughness RZ is less than or equal to 1.6.

Preferably, the height H of each shear driving layer is greater than or equal to 0.3mm and less than or equal to 1mm. The surface-active agent-foaming agent of the present invention is conveyed by a chemical pump to distributing spray nozzles, and then sprayed out by the spray distributing pipes and sprayed into the shear driving layers along a tangent direction of the laminar flow guide discs. By utilizing a viscous force effect of a boundary layer of the shear driving layers, the laminar flow guide discs are driven by the energy carried by pumped foaming agent to rotate rapidly. Meanwhile, with the transfer of the energy carried by the foaming agent, the jet speed of the foaming agent is gradually reduced, the centrifugal force is reduced, the foaming agent is gathered to the center, and the radial speed is reduced until the foaming agent is gathered to the drainage holes. Through the distribution of the spray distributing pipes and the separation of the laminar flow guide discs, the surface-active agent-foaming agent of the present invention is fully scattered, thereby obtaining better performance.

Further, the atomizing turn plate includes discharging cylinders, a conical atomizing hood and an atomizing hood base plate. The discharging cylinders are fixed on the lower ends of the laminar flow guide discs on the lowermost end in the atomizing cylinder and correspond to the outer sides of the drainage holes. The outer side end of the atomizing hood base plate corresponds to the outer side end of the conical atomizing hood, and an atomizing outlet is formed between the atomizing hood base plate and the conical atomizing hood.

Further, a plurality of distributing shear flow channels are arranged on the inner side wall of the conical atomizing hood from the small end to the large end.

In the present invention, the atomizing turn plate is driven by the laminar flow guide discs to rotate at high speed; the surface-active agent-foaming agent is gathered into the conical atomizing hood, rapidly distributed into the distributing shear flow channels under the high-speed rotating centrifugal effect of the conical atomizing hood, sheared and atomized at high speed along the distributing shear flow channels and sprayed out along the atomizing outlet. The high-speed atomized gas forms a negative pressure area on the periphery of the atomizing outlet to inject and drive air in an air pipe and to make the air and the atomized foaming agent mixed violently, so that a uniform and stable micro- bubble group can be more easily formed, thereby facilitating the floatation.

Optionally, the other end of a passage of the atomizing outlet is connected with a secondary atomizing shear mechanism. Further, the secondary atomizing shear mechanism includes distributing shear flow channels, a horn disc, a conical guide hood and a guide hood base plate. A small end of the conical guide hood is connected to the lower end of the atomizing cylinder. The conical atomizing hood is located below the conical guide hood.

An airflow passage hole is reserved between the outer side end of the conical atomizing hood and a position close to the end portion of the conical guide hood. The conical guide hood is provided with an air hole. The air hole is connected and communicated with a driving air pipe.

The horn disc includes an upper horn disc and a lower horn disc. The upper horn disc is connected to the outer side end of the conical guide hood. The guide hood base plate is located below the atomizing hood base plate, an atomizing outlet passage is formed between an outer side section of the guide hood base plate and the conical guide hood, and the atomizing outlet is communicated with the airflow passage hole and the atomizing outlet passage.

The outer side end of the guide hood base plate extends obliquely towards the lateral top and forms a passage with the upper horn disc. The distributing shear flow channels are arranged in the passage. The lower horn disc is integrally connected with the extension end at the outer side of the guide hood base plate and forms a sudden expansion atomizing cavity with the upper horn disc.

After passing by the atomizing outlet, the air can be fully cut into micro bubbles through the shearing and mixing of the distributing shear flow channels. Through the sudden expansion atomizing cavity, the large-granularity bubbles are broken again by negative pressure, and under the full contact and interaction of the foaming agent and the air, the uniform and stable micro-bubble group is finally formed, thereby facilitating the floatation.

Optionally, the other end of the atomizing outlet passage is connected with a 5 supercharging mixing conveying mechanism.

Further, the spray atomizing device also includes a conical guide hood. The small end of the conical guide hood is connected to the lower end of the atomizing cylinder. The other end of the atomizing outlet is connected with the supercharging mixing conveying mechanism.

The supercharging mixing conveying mechanism includes a mixing cavity, an axial- flow mixing speedup impeller, a primary air suction pipe, a conveying pipe, secondary air suction pipes, a sudden expansion mixing cavity and an allocation cavity.

An upper part of the mixing cavity is set in a cylindrical shape, a lower part is in a conical shape, and the upper end of the mixing cavity is fixed on the large end of the conical guide hood. The atomizing outlet is communicated with the mixing cavity. The primary air suction pipe is communicated with the upper end of the mixing cavity; and the axial-flow mixing speedup impeller consists of axial-flow blades and a center shaft. The axial-flow blades are uniformly welded on the side wall of the center shaft. The upper end of the center shaft is welded on the lower surface of the atomizing cover base plate. A speedup outlet is formed on the lower end of the mixing cavity. The lower end of the speedup outlet is communicated with the conveying pipe. The secondary air suction pipes are uniformly distributed on the outer wall of the conveying pipe and communicated with an inner cavity of the conveying pipe. The upper end of the sudden expansion mixing cavity is communicated with a lower port of the conveying pipe. The sudden expansion cavity is in arhombic shape. The allocation cavity is arranged at a lower port of the sudden expansion mixing cavity. The bottom of the allocation cavity is provided with a plurality of distribution outlets.

The atomized gas passes through the atomizing outlet to be gathered into the mixing cavity. The high-speed rotation of the atomizing turn plate drives the axial-flow mixing speedup impeller to rotate at high speed. The rotation of the axial-flow mixing speedup impeller drives the atomized gas to speed up to flow towards the speedup outlet along the axial direction of the center shaft, and drives the primary air suction pipe to inject the air, so that the air is mixed with the atomized gas to speed up to flow towards the speedup outlet. The mixed atomized gas flows rapidly into the sudden expansion mixing cavity through the conveying pipe to drive the secondary air suction pipes to inject the gas and to be mixed and atomized again in the sudden expansion mixing cavity to form the uniform and stable micro-bubble group, thereby preventing the re-emulsification of the atomized gas. The mixed atomized gas enters an atomized chemical adding pipe via the distributing outlet on the lower end of the allocation cavity to participate in the floatation. Due to the supercharging mixing and conveying of the axial-flow mixing speedup impeller and the injection effect of the secondary air suction pipe, the atomized gas can be sufficiently mixed and is efficiently and rapidly mixed with the ore pulp, thereby facilitating the floatation.

Compared with the prior art, by using the above device, the surface-active agent- foaming agent in the present invention can be atomized at first before contacting the air, so that the broken bubbles can be in the atmosphere capable of inhibiting the conglomeration, and the stability of the micro-bubble system can be kept. Meanwhile, through the shear and turbulent mixing for multiple times, the micro-bubble system is more balanced to provide an opportunity of full contact to the high-efficiency mineralization of the bubbles, thereby greatly improving the mineralization efficiency, and improving the floatation effect. A floatation device includes the spray atomizing device described above, and also includes a double-linked-wheel spray stirring mechanism and a shear emulsifying device. The double-linked-wheel spray stirring mechanism includes a floatation tank, a supporting frame, a pre-treatment cabin, a rotary connecting rod, a driving impeller, a stirring impeller, a guide cylinder and a circulating pump, wherein the supporting frame is mounted at an upper opening of the floatation tank. The lower end of the pre-treatment cabin is fixed on the supporting frame, and the side wall of the pre-treatment cabin is connected with an annular jet nozzle; the lower end of the pre-treatment cabin has a discharging opening; and the discharging opening is fixed on the upper end of the guide cylinder in the floatation tank. The upper end of the rotary connecting rod is rotatably connected with the top end of the pre-treatment cabin, and the lower end extends through the discharging opening to be below the guide cylinder. The driving impeller is fixed on the rotary connecting rod located in the pre-treatment cabin and corresponds to the annular jet nozzle. The stirring impeller is fixed at the lower end of the rotary connecting rod. The bottom of the floatation tank is communicated with the circulating pump and also includes an ore pulp circulating feeding pipe, a capturing agent adding pipe and an atomized chemical adding pipe. The annular jet nozzle includes an outer nozzle and an inner nozzle embedded inside the outer nozzle. The inner nozzle is communicated with the ore pulp circulating feeding pipe. The atomized chemical adding pipe is communicated with the outer nozzle. The capturing agent adding pipe is used as an injected pipe and communicated with the ore pulp circulating feeding pipe. An outlet end of the circulating pump is connected and communicated with the ore pulp circulating feeding pipe.

Further, the floatation device also includes a false bottom and a support column. The false bottom is fixed on the bottom of the floatation tank through the support column, and the outer side end extends to a position close to the inner side of a vertical plate.

Further, the floatation device also includes a scraper mechanism. The scraper mechanism includes a rotating shaft support, scraper rotating shafts and scrapers. The rotating shaft support is arranged at the upper end of the floatation tank. The scraper rotating shafts are arranged on the rotating shaft support, and one end of each scraper rotating shaft is fixedly connected with an outer driving motor output end, and a plurality of scrapers are uniformly and fixedly mounted on each scraper rotating shaft. The scrapers are located above a finished ore concentration area.

Specifically, the ore pulp enters the floatation tank via an ore pulp inlet through a pump body and is discharged through the ore pulp outlet. The circulating pump pumps the ore pulp extracted from the ore pulp circulating discharging opening into the ore pulp circulating feeding pipe and injects the emulsified capturing agent in the capturing agent adding pipe, so that the ore pulp is first fully mixed with the capturing agent and then interacts with the capturing agent to change the surface hydrophobicity of minerals, and is sprayed out by the nozzle. Under the injection effect, the atomized foaming agent in the mineral atomized chemical adding pipe is sucked and is fully mixed with the modified ore pulp in the outer nozzle to be rapidly injected out of the annular jet nozzle to drive the driving impeller to rotate, thereby driving the rotary connecting rod to rotate. The ore pulp thrown by the rotation of the driving impeller is re-mixed under the rotary stirring effect of a centrifugal stirring sieve, so that the three phases, i.e. gas, liquid and solid are fully mixed and scattered, pass through the centrifugal stirring sieve to be discharged into the guide cylinder via the discharging opening and then mixed and stirred by the stirring impeller. Finally, the stirred floatation mineralized foams are thrown from the edge of the stirring impeller, float upwardly to a liquid surface above a floatation area, are fully accumulated at the upper end of guide partition plates and scraped out of the floatation tank by the scrapers, while the mineralized foams that are not scraped deposit downwardly to the finished ore concentration area to participate in the floatation again. The recycled ore pulp is re-pumped by the circulating pump into the ore pulp circulating feeding pipe via the ore pulp circulating discharging opening, thereby realizing the cycling floatation. The shear emulsifying device includes an emulsifying tank, chemical spray heads, fixed fluted discs, rotary fluted discs and a speed compensation motor.

The bottom of the emulsifying tank is provided with an emulsifier discharging opening. The chemical spray head is mounted on the top end of the emulsifying tank, a spray head inlet close to the chemical spray head is connected with a water flow injection pipe, and a spray head outlet of the chemical spray head is located in the emulsifying tank and used for injecting a mixed solution of the capturing agent and water into the emulsifying tank. The fixed fluted discs are arranged in the emulsifying tank, and the top end of each fixed fluted disc is provided with a mixed solution inlet and is fixedly communicated with the spray head outlet. The rotary fluted discs are arranged in the emulsifying tank, the rotary fluted discs are disposed opposite to the fixed fluted discs, and a shear flow channel with a sawtooth-shaped longitudinal section communicating the spray head outlet and the emulsifying tank is formed between the rotary fluted discs and the fixed fluted discs. A driving end of the speed compensation motor is connected with a transmission rotating shaft, and the transmission rotating shaft is mounted on the bottom of the emulsifying tank through a bearing and is fixedly connected with the bottom ends of the rotary fluted discs.

The distributing outlet is connected and communicated with the annular jet nozzle, and the emulsifier discharging opening is connected and communicated with the annular jet nozzle.

Further, the floatation device includes a speed compensation mechanism. The speed compensation mechanism includes a speed compensation motor, a permanent magnetic vortex flexible transmission speed regulation device, a belt pulley, a belt and a speed feedback regulator. The speed compensation motor is disposed on a supporting frame. A conductor rotor of the permanent magnetic vortex flexible transmission speed regulation device is connected with a lower rotating shaft of the speed compensation motor. A permanent magnetic rotor of the permanent magnetic vortex flexible transmission speed regulation device is connected with a rotating shaft on the belt pulley, and the belt sleeves the belt pulley and a driven wheel on the upper end of the rotary connecting rod. The speed feedback regulator is arranged on the supporting frame. The speed feedback regulator is provided with two speed detection ends; one is a belt pulley speed detection end; the belt pulley speed detection end is disposed opposite to the rotating shaft of the belt pulley; the other one is the connecting rod speed detection end,

and the connecting rod speed detection end is located on the lower surface of the distributing outlet and is opposite to the upper end of the rotary connecting rod. Due to the presence of the bubbles in the mixed ore pulp and the reduction of the rotating speed caused by the possible fluctuation of feeding concentration, the speed compensation mechanism is introduced. When the speed of the rotary connecting rod is reduced, an output signal of the connecting rod speed detection end of the speed feedback regulator is different from a preset speed signal, so that an regulation signal is outputted, a distance between the permanent magnetic rotor and the conductor rotor of the permanent magnetic vortex flexible transmission speed regulation device is reduced, and the belt pulley acquires a rotating speed and drives the rotary connecting rod to speed up through the belt to reach the preset speed, thereby realizing the speed compensation. When the feeding is stable again, the rotating speed may increase or the speed may be fluctuated due to the increase of a torque between the belt and the belt pulley, and then the distance between the permanent magnetic rotor and the conductor rotor of the permanent magnetic vortex flexible transmission speed regulation device is increased to make the belt pulley slowed down, so that the rotary connecting rod slows down to the preset speed, thereby dynamically compensating the speed, and enabling the rotary connecting rod to realize the stable stirring effect.

By arranging the speed compensation mechanism, when the rotating speed of the rotary connecting rod is unstable due to the unstable feeding, the permanent magnetic vortex flexible transmission speed regulation device is combined with a speed regulation signal of the speed feedback regulator to dynamically compensate the speed of the rotary connecting rod and to ensure the stability of the rotating speed. Moreover, the speed compensation motor also provides power to the high-speed shear emulsifying device through a speed changing box to realize the high-speed low-torque rotation, thereby improving the emulsifying efficiency.

In the present invention, the capturing agent is rapidly conveyed to the emulsifying tank via the chemical spray head under the action of the chemical pump. Under the injection effect of the high-speed capturing agent solution, water is sucked via the water flow injection pipe. The suction amount of the water may be adjusted according to a feeding amount of the capturing agent. A mixed solution is sprayed out via the chemical spray head, subjected to one-time impingement mixing and uniformly allocated to the shear flow channels. The rotary fluted discs are driven by the speed compensation motor and a speed changer to rotate at a high speed. The mixed solution is fully mixed and emulsified under the high-speed shear effect of annular shear teeth and annular shear teeth.

A floatation device includes the above spray atomizing device, a double-linked-wheel spray stirring mechanism and a shear emulsifying device. The shear emulsifying device has a same structure with that of the spray atomizing device.

The distributing outlet of the shear emulsifying device is connected and communicated with the capturing agent adding pipe. The shear emulsifying device is used for emulsifying the capturing agent.

The distributing outlet of the spray atomizing device is connected and communicated with the atomized chemical adding pipe. The spray atomizing device is used for atomizing and foaming the surface-active agent-foaming agent.

In present embodiment, the shear emulsifying device has a same structure with that of the spray atomizing device. The shear emulsifying device specifically achieves better emulsifying effect by mixing and emulsifying the capturing agent and the water.

The floatation device further includes a speed compensation mechanism. The speed compensation mechanism includes a speed compensation motor, a permanent magnet vortex flexible transmission speed regulation device, a belt pulley, a belt and a speed feedback regulator. The speed compensation motor is disposed on a supporting frame. A conductor rotor of the permanent magnetic vortex flexible transmission speed regulation device is connected with a lower rotating shaft of the speed compensation motor. A permanent magnetic rotor of the permanent magnetic vortex flexible transmission speed regulation device is connected with a rotating shaft on the belt pulley, and the belt sleeves the belt pulley and a driven wheel on the upper end of the rotary connecting rod. The speed feedback regulator is arranged on the supporting frame. The speed feedback regulator is provided with two speed detection ends; one is a belt pulley speed detection end; the belt pulley speed detection end is disposed opposite to the rotating shaft of the belt pulley; the other one is the connecting rod speed detection end; and the connecting rod speed detection end is located on the lower surface of the distributing outlet and is opposite to the upper end of the rotary connecting rod.

Due to the presence of the bubbles in the mixed ore pulp and the reduction of the rotating speed caused by the possible fluctuation of feeding concentration, the speed compensation mechanism is introduced. When the speed of the rotary connecting rod is reduced, an output signal of the connecting rod speed detection end of the speed feedback regulator is different from a preset speed signal, so that an regulation signal is outputted, a distance between the permanent magnetic rotor and the conductor rotor of the permanent magnetic vortex flexible transmission speed regulation device is reduced, and the belt pulley acquires a rotating speed and drives the rotary connecting rod to speed up through the belt to reach the preset speed, thereby realizing the speed compensation. When the feeding is stable again, the rotating speed may increase or the speed may be fluctuated due to the increase of a torque between the belt and the belt pulley, and then the distance between the permanent magnetic rotor and the conductor rotor of the permanent magnetic vortex flexible transmission speed regulation device is increased to make the belt pulley slowed down, so that the rotary connecting rod slows down to the preset speed, thereby dynamically compensating the speed and enabling the rotary connecting rod to realize the stable stirring effect. Compared with the prior art, the present invention has the following beneficial effects:

1. By adopting a novel structure design, the present invention integrates the atomization of the foaming agent, emulsification of the capturing agent, pre-mixing and floatation selection, thereby greatly reducing the volume and the floor occupation area of the device. Moreover, the energy consumption for pumping the ore pulp is reduced. The device has the functions of atomizing the foaming agent, emulsifying the capturing agent, spraying, sucking the air, driving, stirring and floatation selecting, and improves the mineral separation efficiency.

2. By arranging the speed compensation device, the present invention controls the reasonable spray driving rotating speed and combines the dynamic speed compensation of the speed compensation motor, thereby greatly reducing the jet energy consumption on the basis of satisfying the floatation and mixing.

3. The present invention fully considers the interaction way of the capturing agent and the ore pulp, and designs the high-speed shear emulsifying device to emulsify the capturing agent. The emulsified capturing agent pre-reacts with the ore pulp through the injection effect to change the surface hydrophobicity of the minerals, so that a good adsorption interface is provided for the high-efficiency mineralization with the bubbles.

4. The present invention considers the effect of the atomized foaming agent on generating the bubbles, and designs the chemical spray atomizing device to enable the foaming agent to be atomized before contacting the air, so that the broken bubbles can be in the atmosphere inhibiting the conglomeration, and the stability of the micro-bubble system can be kept. Meanwhile, through the shearing and turbulent mixing for multiple levels, the micro-bubble system is more balanced to provide an opportunity of full contact to the high-efficiency mineralization of the bubbles, thereby greatly improving the mineralization efficiency, and improving the floatation effect.

5. The annular jet spray heads of the present invention perform the multilevel injection effect. The emulsified capturing agent interacts with the ore pulp first through the injection effect of the inner nozzle to change the hydrophobicity and to provide the good adsorption interface. Then through the injection effect of the outer nozzle, the micro- bubble groups are uniformly mixed with the modified ore pulp, so that the high-efficiency pre-mixing of the bubbles and the ore pulp can be realized. Meanwhile, the impeller is driven by the energy of the annular jet nozzles to rotate, so that the energy waste caused by submerged spray of a spray-type floatation machine can be avoided, and the energy is further effectively utilized.

6. The high-speed shear emulsifying device of the present invention is provided with the shear flow channels consisting of the annular shear teeth and also provided with the rotary fluted discs capable of rotating at high speed, so that the high-efficiency emulsification of the chemicals and water in the circumferential direction can be realized, and the successful discharging in the radial direction can also be realized.

7. The stirring mechanism of the present invention is provided with the conical centrifugal stirring sieve. The mixed ore pulp thrown from the driving impeller is cut again under the rotary cutting effect of the centrifugal stirring sieve, thereby improving the mixing efficiency.

Description of Drawings To describe the technical solutions more clearly in the embodiments of the present invention or in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be simply presented below. Apparently, the following drawings only show some embodiments of the present invention, so for those ordinary skilled in the art, other drawings can also be obtained according to the provided drawings without contributing creative labour.

Fig. 1 is an overall structural schematic diagram of embodiment 1 of a spray atomizing device of the present invention; Fig. 2 is an overall structural schematic diagram of embodiment 2 of a spray atomizing device of the present invention; Fig. 3 is a structural schematic diagram of a distributing spray head and a laminar flow guide disc of a spray atomizing device of the present invention; Fig. 4 is a structural schematic diagram of a lower surface of a conical atomizing hood in a spray atomizing device of the present invention;

Fig. 5 is a top-view sectional schematic diagram of a secondary atomizing shear mechanism in embodiment 1 of a spray atomizing device of the present invention; Fig. 6 is a structural schematic diagram of an embodiment of a floatation device of the present invention; Fig. 7 is a structural schematic diagram of a shear emulsifying device in a floatation device of the present invention; and Fig. 8 is a structural schematic diagram of a scraper mechanism of the present invention.

In the figures: 1, close cover, 11, sealing cover, 12, bearing sleeve, 121a, top ring, 13, atomizing barrel, 131, spray distributing pipe, 133, conical guide hood, 141, rotating shaft, 141a, convex ring, 142, laminar flow guide disc, 144, shear driving layer, 145, drainage hole, 15, atomizing turn plate, 151, discharging cylinder, 152, conical atomizing hood, 153, distributing shear flow channel, 154, atomizing outlet, 155, residual solution recycling atomizing passage, 156, atomizing hood base plate, 16, secondary atomizing shear mechanism, 161, distributing shear flow channel, 162, sudden expansion atomizing cavity, 163, horn disc, 1631, upper horn disc, 1632, lower horn disc, 164, guide hood base plate, 17, supercharging mixing conveying mechanism, 171, mixing cavity, 172, axial-flow mixing speedup impeller, 172a, axial-flow blade, 172b, center shaft, 173, primary air suction pipe, 174, conveying pipe, 175, secondary air suction pipe, 176, sudden expansion mixing cavity, 177, allocation cavity, 178, distributing outlet, 51, floatation tank, 5311, pre-treatment cabin, 5342 rotary connecting rod, 5341, driving impeller, 5343, stirring impeller, 532, guide cylinder, 5317, ore pulp circulating feeding pipe, 5344, centrifugal stirring sieve, 5331, closing hood, 516, guide partition plate, 517, finished ore concentration area, 511, ore pulp inlet, 512, ore pulp outlet, 518, false bottom, 520, circulating pump, 52, rotary support, 513, scraper, 514, scraper rotating shaft, 515, driving motor output end, 5312, annular jet nozzle, 5312a, outer nozzle, 5312b, inner nozzle, 5314, capturing agent adding pipe, 5315, atomized chemical adding pipe, 5317, ore pulp circulating feeding pipe, 30, speed compensation mechanism, 31, speed compensation motor, 32, permanent magnetic vortex flexible transmission speed regulation device, 33, belt pulley, 34, belt, 35, speed feedback regulator, 3514, belt pulley speed detection end, and 351b, connecting rod speed detection end.

Detailed Description Technical solutions in embodiments of the present invention are clearly and completely described in combination with accompanying drawings in embodiments of the present invention. Apparently, the described embodiments are merely some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those ordinary skilled in the art without contributing creative labor belong to the protection scope of the present invention.

As shown in Fig. 1, Fig. 3, Fig. 4 and Fig. 5: Embodiment 1: a spray atomizing device includes an atomizing cylinder 13, a rotating shaft 141, laminar flow guide discs 142 and an atomizing turn plate 15. The upper end of the atomizing cylinder 13 is provided with a close cover 1. The rotating shaft 141 is disposed in the atomizing cylinder 13 along an axial direction of the atomizing cylinder 13, and the upper end of the rotating shaft is rotatably connected with the close cover 1 through a bearing.

The laminar flow guide discs 142 are divided into a plurality of layers and are provided with mounting holes in the middle part, a plurality of laminar flow guide discs 142 are fixedly sleeved on the rotating shaft 141 at intervals and are provided with drainage holes 145, and a shear driving layer 144 is formed between two adjacent layers of laminar flow guide discs 142.

Spray distributing pipes 131 are arranged on the side walls of the atomizing cylinder 13 to correspond to the shear driving layers 144. A solution sprayed by the spray distributing pipes 131 drives the laminar flow guide discs 142 to rotate. The atomizing turn plate 15 has a discharging inlet and an atomizing outlet, the discharging inlet is fixed on the lower end of the laminar flow guide disc 142 on the lowermost end in the atomizing cylinder 13, and the side wall of the discharging inlet corresponds to the outer side wall of the drainage hole 145.

In present embodiment, the shear driving layers 144 are formed among the laminar flow guide discs 142. The spray distributing pipes 131 distribute the sprayed solution, i.e. a surface-active agent-foaming agent, and then the sprayed surface-active agent- foaming agent drives the laminar flow guide discs 142, so that a scattering atomizing effect can be played again. By using the interaction of the atomized foaming agent and bubbles, the surface-active agent-foaming agent is atomized first before contacting the air, so that the broken bubbles are in an atmosphere of inhibiting the conglomeration, and the stability of a micro-bubble system is kept. Meanwhile, through the shearing and turbulent mixing, the micro-bubble system is more balanced to provide an opportunity of full contact for the high-efficiency mineralization of the surface-active agent-foaming agent, thereby greatly improving the mineralization efficiency, and improving the floatation effect.

In present embodiment, the close cover 1 includes a bearing sleeve 12 and a sealing cover 11. The bearing sleeve 12 is fastened to the upper end of the atomizing cylinder 13 through a bolt. The sealing cover 11 is fastened to the upper end of the bearing sleeve 12 through a bolt. An outer ring of the bearing is fixed on the inner wall of the bearing sleeve 12. The upper end of the rotating shaft 141 is fixed on the inner ring of the bearing.

In present embodiment, the bearings are two parallel bearings The two bearings are spaced and positioned by a convex ring 141a formed by inwardly extending the middle portion of the inner wall of the bearing sleeve 12. The lower end of the bearing is clamped and positioned by a top ring 121a formed by inwardly extending the lower end of the inner wall of the bearing sleeve 12.

By adopting the technical solution, the two bearings are clamped and embedded in the bearing sleeve 12 and are limited by the convex ring 141a and the top ring 121a not to move when the whole body rotates, thereby ensuring the rotating stability of the rotating shaft 141.

In present embodiment, the spray distributing pipes 131 are divided into a plurality of groups. Longitudinal sections of a plurality of spray distributing pipes 131 in each group are distributed on the wall of the atomizing cylinder 13 in a fan shape and are gradually increased towards the shear driving layers 144.

In present embodiment, the outer edge of each laminar flow guide disc 142 is set in a conical shape, so that the spray distributing pipes 131 can more smoothly distribute the surface-active agent-foaming agent into the laminar flow guide discs 142.

More specifically, the laminar flow guide discs 142 are made of a high-strength alloy steel plate, and the surface roughness RZ is less than or equal to 1.6.

More specifically, a height H of each shear driving layer 144 is greater than or equal to 0.3mm and less than or equal to 1mm.

In present embodiment, the surface-active agent-foaming agent is conveyed by a chemical pump to distributing spray heads 131, and then sprayed out by the spray distributing pipes 131 and distributed and injected into the shear driving layers along a tangent direction of the laminar flow guide discs 142. By utilizing a viscous force effect of a boundary layers of the shear driving layers 144, the energy carried by the pumped foaming agent is fully used to drive the laminar flow guide discs 142 to rotate at high speed. Meanwhile, with the transfer of the energy carried by the foaming agent, a jet speed of the foaming agent is reduced gradually, the centrifugal force of the foaming agent is reduced, the foaming agent is gathered to the center, and the radial speed of the foaming agent is reduced until the foaming agent is gathered to drainage holes 145. In present embodiment, through the distribution of the spray distributing pipes 131 and the separation of the laminar flow guide discs 142, the surface-active agent-foaming agent is fully scattered, thereby obtaining better performance.

In present embodiment, the spray atomizing device also includes an atomizing turn plate 15. The atomizing turn plate 15 includes a discharging cylinder 151, a conical atomizing hood 152 and an atomizing hood base plate 156. The discharging cylinder 151 is fixed on the lower end of the laminar flow guide disc 142 on the lowermost end in the atomizing cylinder 13 and corresponds to the outer side of drainage hole 145. The outer side end of the atomizing hood base plate 156 corresponds to the outer side end of the conical atomizing hood 152, and an atomizing outlet 154 is formed between the atomizing hood base plate and the conical atomizing hood.

In some embodiments, the spray atomizing device also includes a secondary atomizing shear mechanism 16. The secondary atomizing shear mechanism 16 includes distributing shear flow channels 161, a horn disc 163, a conical guide hood 133 and a guide hood base plate 164. The small end of the conical guide hood is connected to the lower end of the atomizing cylinder 13. The conical atomizing hood 152 is located below the conical guide hood.

An airflow passage hole is reserved between the outer side end of the conical atomizing hood 152 and a position close to the end portion of the conical guide hood 133. The conical guide hood 133 is provided with air holes. The air holes are connected and communicated with driving air pipes 132.

The horn disc 163 includes an upper horn disc 1631 and a lower horn disc 1632. The upper horn disc is connected to the outer side end of the conical guide hood 133. The guide hood base plate 164 is located below the atomizing hood base plate 156, an atomizing outlet passage is formed between an outer side section of the guide hood base plate and the conical guide hood 133, and the atomizing outlets 154 are communicated with the airflow passage holes and the atomizing outlet passage.

The outer side end of the guide hood base plate 164 extends obliquely towards the lateral top and forms a passage with the upper horn disc 163. The distributing shear flow channels 161 are arranged in the passage. The lower horn disc 1632 is integrally connected with the extension end at the outer side of the guide hood base plate 164 and forms a sudden expansion atomizing cavity 162 with the upper horn disc 1631.

In present embodiment, a plurality of distributing shear flow channels 153 are arranged on the inner side wall of the conical atomizing hood 152 from the small end to the large end.

More specifically, a residual solution recycling and atomizing passage 155 is formed between the outer wall of the atomizing turn plate 15 and the inner wall of a rotating cylinder 13, and the closer to the atomizing outlet 154, the smaller the space is.

In present embodiment, the atomizing turn plate 15 is driven by the laminar flow guide discs 142 to rotate at high speed, and the surface-active agent-foaming agent is gathered into the conical atomizing hood 152 and is rapidly allocated into the distributing shear flow channels 153 under the high-speed rotation centrifugal effect of the conical atomizing hood 152 and is sheared and atomized rapidly along the distributing shear flow channels 153 and sprayed out along the atomizing outlet 154. The high-speed atomized gas forms a negative pressure area on the periphery of the atomizing outlet 154 to inject and drive air in the air pipes132 and to make the air and the atomized foaming agent mixed violently, so that a uniform and stable micro-bubble group can be more easily formed, thereby facilitating the floatation.

More specifically, the secondary atomizing shear mechanism 16 is integrally in a disc shape. The distributing shear flow channels 161 are circumferentially distributed in a radiation shape. The sudden expansion atomizing cavity 162 is provided with a plurality of converging atomized chemical adding pipes 5315. The atomized chemical adding pipes 5315 are used to add the atomized and foamed surface-active agent-foaming agent into the ore pulp floatation device.

In present embodiment, after passing by the atomizing outlet 154, through the re- shear mixing and cutting of the distributing shear flow channels 161, the air can be fully cut into micro bubbles. Through the sudden expansion atomizing cavity 162, the large- granularity bubbles are broken again by the negative pressure, and finally under the full contact and interaction of the foaming agent and air, a uniform and stable micro-bubble group is formed, thereby facilitating the floatation.

As shown in Fig. 2, in embodiment 2, the spray atomizing device also includes a conical guide hood 133. The small end of the conical guide hood 133 is connected to the lower end of the atomizing cylinder 13. A supercharging mixing conveying mechanism 17 includes a mixing cavity 171, an axial-flow mixing speedup impeller 172, a primary air suction pipe 173, a conveying pipe 174, a secondary air suction pipe 175, a sudden expansion mixing cavity 176 and an allocation cavity 177.

An upper part of the mixing cavity 171 is set in a cylindrical shape, a lower part is in a conical shape, and the upper end of the mixing cavity is fixed on the large end of the conical guide hood 133. The primary air suction pipe 173 is communicated with the upper end of the mixing cavity. The axial-flow mixing speedup impeller 172 consists of axial- flow blades 172a and a center shaft 172b. The axial-flow blades 172a are uniformly welded on the side wall of the center shaft 172b. The upper end of the center shaft 172b is welded on the lower surface of the atomizing hood base plate 156. A speedup outlet is formed on the lower end of the mixing cavity 171. The lower end of the speedup outlet is communicated with the conveying pipe 174. The secondary air suction pipes 175 are uniformly distributed on the outer wall of the conveying pipe 174 and communicated with the inner cavity of the conveying pipe 174. The upper end of the sudden expansion mixing cavity 176 is communicated with the lower port of the conveying pipe 174. The sudden expansion mixing cavity 176 is in a rhombic shape. The allocation cavity 177 is arranged at the lower port of the sudden expansion mixing cavity 176. The bottom of the allocation cavity 177 is provided with a plurality of distributing outlets 178.

In present embodiment, after passing through the atomizing outlet 154, the atomized gas can also be gathered into the mixing cavity 171. The high-speed rotation of the atomizing turn plate 15 drives the axial-flow mixing speedup impeller 172 to rotate at high speed. The rotation of the axial-flow mixing speedup impeller drives the atomized gas to speed up to flow towards the speedup outlet along the axial direction of the center shaft, and also drives the primary air suction pipe 173 to inject the air, and the injected air is mixed with the atomized gas to speed up to flow towards the speedup outlet. The mixed atomized gas flows into the sudden expansion mixing cavity 176 at a high speed through the conveying pipe 179 to drive the secondary air suction pipes 175 to inject the gas while being simultaneously mixed and atomized again in the sudden expansion mixing cavity 176, forming the uniform and stable micro-bubble group, thereby preventing the re- emulsification of the atomized gas. The mixed atomized gas enters the atomized chemical adding pipe through the distributing outlets 178 on the lower end of the allocation cavity 177 to participate in the floatation. In present embodiment, due to the supercharging mixing and conveying of the axial-flow mixing speedup impeller 172 and the injection effect of the secondary air suction pipes 175, the atomized gas can be fully mixed and can be efficiently mixed with the ore pulp at a high speed, thereby facilitating the floatation.

Compared with the prior art, by using the above device in the present embodiment, the surface-active agent-foaming agent can be atomized first before contacting the air,

so that the broken bubbles can be in the atmosphere of inhibiting the conglomeration, and the stability of the micro-bubble system can be kept.

Meanwhile, through the shearing and turbulent mixing for multiple times, the micro-bubble system is more balanced to provide an opportunity of full contact for the high-efficiency mineralization of the bubbles, thereby greatly improving the mineralization efficiency, and improving the floatation effect.

As shown in Fig. 6 and Fig. 7, a floatation device includes the above spray atomizing device, and also includes a double-linked-wheel spray stirring mechanism and a shear emulsifying device.

The double-linked-wheel spray stirring mechanism includes a floatation tank 51, a supporting frame, a pre-treatment cabin 5311, a rotary connecting rod 5342, a driving impeller 5341, a stirring impeller 5343, a guide cylinder 532 and a circulating pump 520. The supporting frame is mounted at an upper opening of the floatation tank 51. The lower end of the pre-treatment cabin 5311 is fixed on the supporting frame, and the side wall of the pre-treatment cabin is connected with an annular jet nozzle 5312; the lower end of the pre-treatment cabin 5311 has a discharging opening, and the discharging opening is fixed on the upper end of the guide cylinder 532 in the floatation tank 51. The upper end of the rotary connecting rod 5342 is rotatably connected with the top end of the pre- treatment cabin 5311, and the lower end extends through the discharging opening to be below the guide cylinder 532. The driving impeller 5341 is fixed on the rotary connecting rod 5342 located in the pre-treatment cabin 5311 and corresponds to the annular jet nozzle 5312. The stirring impeller 5343 is fixed on the lower end of the rotary connecting rod 5342. The bottom of the floatation tank 51 is communicated with the circulating pump 520 and also includes an ore pulp circulating feeding pipe 5317, a capturing agent adding pipe 5314 and an atomized chemical adding pipe 5315. The annular jet nozzle 5312 includes an outer nozzle 5312a and an inner nozzle 5312b embedded inside the outer nozzle 5312a.

The inner nozzle 5312b is communicated with the ore pulp circulating feeding pipe 5317. The atomized chemical adding pipe 5315 is communicated with the outer nozzle 5312a.

The capturing agent adding pipe 5314 is used as an injected pipe and communicated with the ore pulp circulating feeding pipe 5317. An outlet end of the circulating pump 520 is connected and communicated with the ore pulp circulating feeding pipe 5317. In present embodiment, the floatation device also includes a false bottom 518 and a support column.

The false bottom 518 is fixed on the bottom of the floatation tank 51 through the support column, and the outer side end extends to a position close to the inner side of a vertical plate.

In present embodiment, as shown in Fig. 6 and Fig. 8, the floatation device also includes a scraper mechanism.

The scraper mechanism includes a rotating shaft support 52, scraper rotating shafts 514 and scrapers 513. The rotating shaft support 52 is arranged at the upper end of the floatation tank 51. The scraper rotating shafts 514 are arranged on the rotating shaft support 52, and one end of each scraper rotating shaft 514 is fixedly connected with an outer driving motor output end 515; and a plurality of scrapers 513 are uniformly and fixedly mounted on each scraper rotating shaft 514. The scrapers

513 are located above a finished ore concentration area.

Specifically, the ore pulp enters the floatation tank 51 via an ore pulp inlet 511 through a pump body and is discharged through the ore pulp outlet 512. The circulating pump 520 pumps the ore pulp extracted from the ore pulp circulating discharging opening 519 into the ore pulp circulating feeding pipes 5317, and the emulsified capturing agent in the capturing agent adding pipe 5314 is injected, so that the ore pulp is fully mixed with the capturing agent before interacting with the capturing agent to change the surface hydrophobicity of minerals and is sprayed out via the inner spray nozzle 5312b.

Then under the injection effect, the atomized foaming agent in the atomized chemical adding pipe 5315 is sucked and is fully mixed with the modified ore pulp in the outer nozzle 5312a to be sprayed out of the annular jet nozzle 5312 at high speed and to impact the driving impeller 5314 to rotate, thereby driving the rotary connecting rod 5342 to rotate.

The ore pulp thrown by the driving impeller 5314 is re-mixed under the rotating and stirring effect of a centrifugal stirring sieve 5344, so that the three phases, i.e. gas, liquid and solid are fully mixed and scattered and pass through the centrifugal stirring sieve 5344 to be discharged into the guide cylinder 532 via the discharging opening 5313 and are mixed and stirred by the stirring impeller 5343. Finally, the stirred floatation mineralized foams are thrown out from the edge of the stirring impeller 5343 and float upwardly to a liquid surface above a floatation area, and the foams are fully accumulated at upper ends of guide partition plates 516. The secondarily concentrated finished ore foams are scraped out of the floatation tank 51 by the scrapers 513, while the concentrated residual fine silt with high ash content and the finished ore that are not scraped and are separated from the bubbles deposit into the finished ore concentration area 517, deposit below the guide partition plates 516 and pass by the guide partition plates 516 to return to a floatation mineralization area to participate in the floatation again.

The recycled ore pulp is re- pumped by the circulating pump 520 into the ore pulp circulating feeding pipe 5317 via the ore pulp circulating discharging opening 519, thereby realizing the cycling floatation.

The shear emulsifying device includes an emulsifying tank 22, a chemical spray head 23, fixed fluted discs 25, rotary fluted discs 26 and a speed compensation motor 31.

The bottom of the emulsifying tank 22 is provided with an emulsifier discharging opening. The chemical spray head 23 is mounted on the top end of the emulsifying tank 22, aspray head inlet close to the chemical spray head 23 is connected with a water flow injection pipe 24, and a spray head outlet of the chemical spray head 23 is located in the emulsifying tank 22 and used for injecting a mixed solution of the capturing agent and water into the emulsifying tank 22. The fixed fluted discs 25 are arranged in the emulsifying tank 22, and the top end is provided with a mixed solution inlet and is fixedly communicated with the spray head outlet. The rotary fluted discs 26 are arranged in the emulsifying tank 22, and the rotary fluted discs 26 are disposed opposite to the fixed fluted discs 25 and form a shear flow channel 262 with a sawtooth-shaped longitudinal section communicating the spray head outlet and the emulsifying tank 22 together with the fixed fluted disc 25. A driving end of the speed compensation motor 31 is connected with a transmission rotating shaft 27, and the transmission rotating shaft 27 is mounted on the bottom of the emulsifying tank 22 through a bearing 28 and is fixedly connected with the bottom ends of the rotary fluted discs 26.

The distributing outlets 178 are connected and communicated with the annular jet nozzle 5312, and the emulsifier discharging opening is connected and communicated with the annular jet nozzle 5312.

The floatation device also includes a speed compensation mechanism 30. The speed compensation mechanism 30 includes a speed compensation motor 31, a permanent magnetic vortex flexible transmission speed regulation device 32, a belt pulley 33, a belt 34 and a speed feedback regulator 35. The speed compensation motor 31 is disposed on the supporting frame. A conductor rotor of the permanent magnetic vortex flexible transmission speed regulation device 32 is connected with a lower rotating shaft of the speed compensation motor 31. A permanent magnetic rotor of the permanent magnetic vortex flexible transmission speed regulation device 32 is connected with a rotating shaft of the belt pulley 33, and the belt 34 sleeves the belt pulley 33 and a driven wheel on the upper end of the rotary connecting rod 5342. The speed feedback regulator 35 is arranged on the supporting frame. The speed feedback regulator 35 is provided with two speed detection ends; one is a belt pulley speed detection end 351a; the belt pulley speed detection end 351a is disposed opposite to the rotating shaft of the belt pulley 33; the other one is a connecting rod speed detection end 351b; and the connecting rod speed detection end 351b is located on the lower surface of the distributing outlet 178 and is opposite to the upper end of the rotary connecting rod 5432. Due to the presence of bubbles in the mixed ore pulp and the reduction of the rotating speed caused by the possible fluctuation of feeding concentration, the speed compensation mechanism 20 is introduced. When the speed of the rotary connecting rod 5342 is reduced, an output signal of the connecting rod speed detection end 351b of the speed feedback regulator 35 is different from a preset speed signal, so that a regulation signal is outputted; a distance between the permanent magnetic rotor and the conductor rotor of the permanent magnetic vortex flexible transmission speed regulation device 32 is reduced; and the belt pulley 33 acquires a rotating speed and drives the rotary connecting rod 5342 to speed up through the belt 34 to reach the preset speed, thereby realizing the speed compensation. When the feeding is stable again, the rotating speed may be increased or the speed may be fluctuated due to the increase of a torque between the belt 34 and the belt pulley 33, and then the distance between the permanent magnetic rotor and the conductor rotor of the permanent magnetic vortex flexible transmission speed regulation device 32 is increased to make the belt pulley 33 slowed down, so that the rotary connecting rod 5342 slows down to the preset speed, thereby dynamically compensating the speed, and enabling the rotary connecting rod 5342 to realize the stable stirring effect.

By arranging the speed compensation mechanism 30, when the rotating speed of the rotary connecting rod is unstable due to the unstable feeding, the permanent magnetic vortex flexible transmission speed regulation device 32 is combined with the speed regulation signal of the speed feedback regulator 35 to dynamically compensate the speed of the rotary connecting rod and to ensure the stability of the rotating speed. Moreover, the speed compensation motor 31 can provide power to the high-speed shear emulsifying device through a speed changing box 21 to realize the high-speed low-torque rotation, thereby improving the emulsifying efficiency.

In the present invention, the capturing agent is rapidly conveyed to the emulsifying tank via the chemical spray head 23 under the effect of a chemical pump. Under the injection effect of the high-speed capturing agent solution, water is sucked via the water flow injection pipe 24. The suction amount of the water may be adjusted according to a feeding amount of the capturing agent. A mixed solution is sprayed out via the chemical spray head 23, subjected to one-time impingement mixing on 263 and uniformly allocated to the shear flow channels b262. The rotary fluted discs 26 are driven by the speed compensation motor 31 and a speed changer 21 to rotate at a high speed. The mixed solution in 262 is fully mixed and emulsified under the high-speed shearing effect of annular shear teeth a251 and annular shear teeth b261.

The present invention adopts the above technical solution.

Compared with the prior art that the final energy of conveying the chemicals and the pulp in the existing floatation process is completely converted into the internal energy consumption in a pulp mixing device and a floatation tank, the present invention fully utilizes the energy of the circulating pump 520 for conveying the ore pulp to drive the spray atomizing device, thereby driving the pre-treatment stirring mechanism to perform the pulp mixing pre- treatment without a dedicated pulp mixing device, so that the energy consumption caused by converting the dynamic energy into the internal energy when a slurry pump conveys the ore pulp can be avoided.

Meanwhile, the energy of the annular jet nozzle 5321 is fully utilized to drive the double-linked-wheel spray stirring mechanism to stir and floatation select the ore pulp, thereby greatly reducing the energy waste caused by the submerged jets of a spray mechanism of a spray-type floatation machine, realizing the effective utilization of the energy, and reducing the energy consumption.

In the aspect of the structure design and working process, the pre-treatment effect of the capturing agent and the ore pulp as well as an effect of the atomized foaming agent on generating the bubbles are fully considered, and the capturing agent reacts with the ore pulp first to change the surface hydrophobicity of the minerals, thereby providing a good adsorption interface to the high-efficiency mineralization with bubbles.

Meanwhile, the foaming agent is atomized at first before contacting the air, so that the broken bubbles are in an atmosphere of inhibiting the conglomeration, and the stability of the micro- bubble system is kept.

Moreover, by virtue of multi-time shearing and turbulent mixing, the micro-bubble system is more balanced to provide an opportunity of full contact to the high-efficiency mineralization of the bubbles, thereby greatly improving the mineralization efficiency, and improving the floatation effect.

In another embodiment: a floatation device includes the above spray atomizing device, a double-linked-wheel spray stirring mechanism and a shear emulsifying device.

The shear emulsifying device has a same structure with that of the spray atomizing device.

A distributing outlet 178 of the shear emulsifying device is connected and communicated with the capturing agent adding pipe 5314. The shear emulsifying device is used for emulsifying the capturing agent.

The distributing outlet 178 of the spray atomizing device is connected and communicated with the atomized chemical adding pipe 5315. The spray atomizing device is used for atomizing and foaming the surface-active agent-foaming agent.

The shear emulsifying device has a same structure with that of the spray atomizing device. The shear emulsifying device specifically achieves better emulsifying effect by mixing and emulsifying the capturing agent and the water. The floatation device also includes a speed compensation mechanism 30. The speed compensation mechanism 30 includes a speed compensation motor 31, a permanent magnetic vortex flexible transmission speed regulation device 32, a belt pulley 33, a belt 34 and a speed feedback regulator 35. The speed compensation motor 31 is disposed on the supporting frame. A conductor rotor of the permanent magnetic vortex flexible transmission speed regulation device 32 is connected with a lower rotating shaft of the speed compensation motor 31. A permanent magnetic rotor of the permanent magnetic vortex flexible transmission speed regulation device 32 is connected with a rotating shaft of the belt pulley 33, and the belt 34 sleeves the belt pulley 33 and a driven wheel on the upper end of the rotary connecting rod 5342. The speed feedback regulator 35 is arranged on the supporting frame. The speed feedback regulator 35 is provided with two speed detection ends; one is a belt pulley speed detection end 3514; the belt pulley speed detection end 351a is disposed opposite to the rotating shaft of the belt pulley 33; the other one is a connecting rod speed detection end 351b; and the connecting rod speed detection end 351b is located on the lower surface of the distributing outlet 178 and is opposite to the upper end of the rotary connecting rod 5432.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments are apparent for those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments described herein but shall conform to the widest scope consistent with the principles and novel characteristics disclosed herein.

Claims

CONCLUSIONS

An atomizing device comprising an atomizing cylinder (13), a rotary shaft (141), laminar flow guiding discs (142) and an atomizing rotary disc (15), wherein - the upper end of the atomizing cylinder (13) is provided with a closure cover ( 1); - the rotary shaft (141) in the atomizing cylinder (13) is placed in the axial direction of the atomizing cylinder (13) and the upper end of the rotary axis is rotatably connected to the closure cover (1); - the laminar flow guiding discs (142) are divided into a plurality of layers and are provided with mounting holes in the middle part; - a plurality of laminar flow guide discs (142) are spaced apart fixedly about the axis of rotation (141) and are provided with drainage openings (145); - and a shear propellant layer (144) is formed between two adjacent layers of laminar flow guide discs {142}; - mist manifolds (131) are placed at positions of the side wall of the atomizing cylinder (13), which positions correspond to the shear propellants (144); - a solution sprayed through the mist manifolds (131) to drive the laminar flow guide discs (142) to spin; - the atomizing turntable (15) has a material delivery inlet and an atomization outlet (154); - the material delivery inlet is attached to the lower end of the laminar flow guide disc (142), which is attached to the bottom end in the atomizing cylinder (13), and the side wall of the material delivery inlet corresponds to the outer side wall of the drainage opening (145) ).

The nebulizing device of claim 1, wherein:

- the sealing cover (1) comprises a bearing bush (12) and a sealing cover (11), and the bearing bush (12) is attached by means of a bolt to the upper end of the atomizing cylinder (13); - the sealing cover (11) is fastened with a bolt to the upper end of the bearing bush (12); - an outer ring of the bearing is attached to the inner wall of the bearing bush (12); and - the upper end of the pivot shaft (141) is fixed on an inner ring of the bearing.

The nebulizing device of claim 2, wherein - the bearings are two parallel bearings; - the two bearings are spaced from each other by a convex ring (1414) formed by extending inwardly the center portion of the inner wall of the bearing bush (12); and - the lower end of the bearing is clamped and held in place by an upper ring (1114) formed by extending inwardly the lower end of the inner wall of the bearing bush (12).

The misting device of claim 3, wherein - the mist manifolds (131) are divided into a plurality of groups; - longitudinal sections of the number of mist manifolds (131) of each group are distributed in a fan shape on the wall of the atomizing cylinder (13) and gradually increase in the direction of the shear propellant layer (144).

The nebulizer according to claim 4, wherein - the nebulizer turntable (15) includes discharge cylinders (151), a conical nebulizer cap (152), and an nebulizer cap base plate (156); - the discharge cylinders (151) are attached to the lower ends of the laminar flow guide discs (142) in the lower end of the atomizing cylinder (13), and correspond to the outer sides of the drainage openings (145);

- the outer side end of the atomization cap base plate (156) corresponds to the outer side end of the conical atomization cap (152) and an atomization outlet (154) is formed between the atomization cap base plate and the conical atomization cap; and - a plurality of shear flow channels (153) from small end to large end are arranged on the inner side wall of the conical atomizing hood (152).

The atomization device of claim 5, wherein - the other end of the atomization outlet (154) is connected to a secondary atomization shear mechanism (16); - the secondary atomization shear mechanism (16) comprises shear flow dividing channels (161), a horn disk (163), a conical guide cap (133) and a guide cap base plate (164); - a small end of the conical guide cap (133) is connected to the lower end of the atomizing cylinder (13); - and the conical atomization cap (152) is located below the conical guide cap; - an air flow opening is located between the outer side end of the conical nozzle cap (152) and a position close to the end portion of the conical guide cap (133); - the conical guide cap (133) is provided with an air opening; - the vent is connected and in communication with a drive air line (132); - the horn disk (163) comprises an upper horn disk (1631) and a lower horn disk (1632); - the upper horn disk is connected to the outer side end of the conical guide cap (133); - the bottom plate of the guide cap (164) is below the atomizing cap base plate (156); - an atomization outlet is formed between an outside section of the guide cap base plate and the conical guide cap (133); - the atomizing outlet (154) communicates with the air flow passage opening and the atomizing outlet passage;

- the outer side end of the guide cap base plate (164) extends obliquely towards the lateral top and forms a passage with the upper horn disk (163); - the dividing shear flow channels (161) are arranged in the passageway; - the lower horn disk (1632) is integrally connected to the extended outer end of the guide cap base plate (164) and forms with the upper horn disk (1631) an atomizing cavity (162) for sudden expansion.

The atomizing device of claim 5, wherein - the atomizing device also comprises a conical guide cap (133); - the small end of the conical guide cap (133) is connected to the lower end of the atomizer barrel (13); - the other end of the atomizing outlet (154) is connected to a pressure-filling mixing transport mechanism (17); - the pressure-filling mixing transport mechanism (17), a mixing cavity (171), an axial flow mixing gear rotor (172), a primary air suction line (173), a transport line (174), secondary air suction lines (175), a mixing cavity (176) for sudden expansion and a assignment cavity (177); - an upper portion of the mixing cavity (171) is in a cylindrical shape, a lower portion is in a conical shape, and the upper end of the mixing cavity is attached to the large end of the conical guide cap (133); - the atomization outlet (154) communicates with the mixing cavity (171); - the primary air suction line (173) communicates with the upper end of the mixing cavity (171); - the axial flow mixing gear rotor (172) consists of axial flow blades (1724) and a center shaft (172b); - the axial flow blades (172a) are evenly welded to the side wall of the center shaft (172b); - the upper end of the center shaft (172b) is welded to the lower surface of the atomization hood base plate (156);

- a gear outlet is formed at the lower end of the mixing cavity (171); - the lower end of the gear outlet communicates with the transfer line (174); - the secondary air suction lines (175) are evenly distributed on the outer wall of the transport conduit (174) and communicate with an inner cavity of the transport conduit (174); - the upper end of the sudden expansion mixing cavity (176) communicates with a lower port of the transfer line (174); - the sudden expansion cavity (176) has a diamond shape; the allocation cavity (177) is located at a lower port of the sudden expansion mixing cavity (176); and - the bottom of the allocation cavity (177) is provided with a plurality of distribution outlets (178).

A floatation device, comprising the nebulization device according to claim 7, and also a double coupled wheel atomization stirring mechanism and a shear - emulsification device, wherein - the double coupled wheel atomization stirring mechanism, a float tank (51), a support frame, a pre-treatment booth (5311), a rotatable connecting rod (5342), a drive rotor (5341), a stirring rotor (5343), a guide cylinder (532) and a circulation pump (520); - the support frame is attached to an upper opening of the float tank (51); - the lower end of the pretreatment booth (5311) is attached to the cradle and the sidewall of the pretreatment booth is connected to an annular nozzle (5312); - the lower end of the pretreatment booth (5311) has a dispensing opening and the dispensing opening is attached to the upper end of the guide cylinder (532) in the float tank (51); - the upper end of the rotatable connecting rod (5342) is pivotally connected to the upper end of the pretreatment booth (5311), and the lower end extends through the dispensing opening so that it is below the guide cylinder (532);

- the drive rotor (5341) is attached to the rotatable connecting rod (5342) located in the pretreatment booth (5311) and corresponding to an annular nozzle (5312);

- the agitator rotor (5343) is attached to the lower end of the rotatable connecting rod (5342); the bottom of the float tank (51) is connected to the circulation pump (520); and one end of the circulation pump (520) is connected and connected to an annular nozzle (5312);

- the shear emulsifier consists of an emulsification tank (22), chemical spray heads (23), fixed flute discs (25), rotating flute discs (26) and a speed compensation motor (31);

- the bottom of the emulsification tank (22) is provided with a discharge opening for emulsifier;

- the chemical spray nozzle (23) is mounted at the top end of the emulsification tank (22), a spray nozzle inlet near the chemical spray nozzle (23) is connected to a water flow injection pipe (24), and a nozzle outlet of the chemical spray nozzle (23) is located in the emulsification tank (22) and is used to squirt a mixed solution of the collector and water into the emulsification tank (22);

- solid fluted discs (25) are placed in the emulsification tank (22) and the top end of each solid fluted disc has an inlet for a mixed solution and is in fixed communication with the nozzle outlet;

- the rotatable fluted discs (26) are placed in the emulsification tank (22), the rotatable fluted discs (26) are placed opposite the fixed fluted discs (25), and between the rotatable fluted discs and the fixed fluted discs (25) a shear flow channel (262) having an elongated saw-toothed section is formed that communicates between the nozzle outlet and the emulsification tank (22);

- a drive end of the speed compensation motor (31) is connected to a transmission pivot shaft (27), and the transmission pivot shaft (27) is mounted via a bearing (28) on the bottom of the emulsification tank (22) and is rigidly connected to the bottom ends of the rotatable fluted discs (26); and - the manifold outlet (178) is connected and communicates with the annular nozzle (5312), and the emulsifier discharge port is connected and communicates with the annular nozzle (5312).

A floatation device comprising the nebulizer according to claim 7, and also a double coupled wheel nebulization stirring mechanism and a shear emulsifier, wherein - the shear emulsification structure is the same as the structure of the nebulizer; - the double coupled wheel atomization - stirring mechanism a float tank (51), a support frame, a pre-treatment booth (5311), a rotating connecting rod (5342), a drive rotor (5341), a stirring rotor (5343), a guide cylinder (532) and a circulation pump ( 520); - the support frame is mounted on an upper opening of the float tank (51); - the lower end of the pretreatment booth (5311) is attached to the cradle, and the sidewall of the pretreatment booth is connected to an annular sprayer (5312); - the lower end of the pretreatment booth (5311) has a dispensing opening, and the dispensing opening is attached to the upper end of the guide cylinder (532) in the float tank (51); - the upper end of the rotatable connecting rod (5342) is pivotally connected to the upper end of the pre-treatment booth (5311), and the lower end extends through the outflow opening so that it is below the guide cylinder (532); - the drive rotor (5341) is attached to the rotatable connecting rod (5342) located in the pretreatment booth (5311) and corresponding to the annular nozzle (5312); - the agitator rotor (5343) is attached to the lower end of the rotatable connecting rod (5342);

- the bottom of the float tank (51) communicates with the circulation pump (520); - an outlet end of the circulation pump (520) is coupled and communicates with inlet end of the annular nozzle (5312); - the driffing device comprises a supply line (5317) for circulating ore pulp, a supply line (5314) for capture agent and a supply pipe (5315) for atomized chemicals; - the annular nozzle (5312) includes an outer nozzle (5312a) and an inner nozzle (5312b) embedded in the outer nozzle; - the inner nozzle (5312b) communicates with the circulating ore pulp feed tube (5317); - the atomized chemical addition tube (5315) communicates with the outer nozzle (53123); - the capture agent supply pipe (5314) is used as an injection pipe and communicates with the circulating ore pulp supply pipe (5317); - an outlet end of the circulating pump (520) is coupled and communicates with the circulating ore pulp feed tube (5317); - the manifold outlet (178) of the shear emulsifier is coupled and communicates with the capture agent supply pipe (5314); and - the manifold outlet (178) of the atomizer is coupled and communicates with the supply pipe (5315) for atomized chemicals.

The driving apparatus according to claim 8 or 9, further comprising a speed compensation mechanism (30), wherein - the speed compensation mechanism (30), a speed compensation motor (31), a permanent magnetic vortex flexible transmission speed controller (32), a pulley (33), a belt (34) and a speed feedback controller (35); - the speed compensation motor (31) is placed on a support frame; - a guide rotor of the permanent magnetic vortex flexible speed controller (32) is connected to a lower pivot shaft of the speed compensation motor (31);

- a permanent magnetic rotor of the permanent magnetic vortex speed controller (32) is connected to a rotary shaft on the pulley (33); - the belt (34) wraps around the pulley (33) and a driven wheel at the top end of the rotating connecting rod (5342); - the feedback controller (35) is placed on the cradle; - the feedback controller (35) has two speed detecting ends - one of the speed detecting ends is a speed detecting end of the pulley (33); - the speed detecting end (351a) of the pulley is opposite the pivot axis of the pulley (33); and - the other speed sense ends is the speed sense end (351b) of the connecting rod and is located on the lower surface of the manifold outlet (178) and is opposite the top end of the rotatable connecting rod (5432).