Self-rotating ultrasonic flotation equipment with premixing function and method

Abstract

According to the self-rotating ultrasonic flotation equipment with the premixing function and the method, the premixing device is arranged to conduct ultrasonic pretreatment and premixing on a mixture of ore pulp and flotation reagents, the mixing degree can be improved, meanwhile, the hydrophilic-hydrophobic property of the surfaces of fine-fraction minerals is adjusted through the ultrasonic effect, and the flotation efficiency is improved. A foundation is laid for subsequent flotation separation; a flotation stirring mechanism is arranged, two sets of flotation stirring assemblies are used for rotating in the same direction, strong turbulence disturbance is formed on flotation ore pulp, gas is introduced into a flotation barrel while stirring is conducted, air is evenly exhausted through a self-rotating ultrasonic and cleaning mechanism, matched flotation bubbles are generated, and the combination efficiency of minerals and the bubbles is improved; by arranging a self-rotating ultrasonic and cleaning mechanism, ultrasonic global coverage in the flotation process is achieved, and the attachment efficiency of bubbles and hydrophobic minerals is improved; meanwhile, the inner wall and the bottom wall of the flotation barrel can be cleaned, and mineral attachment and accumulation are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mineral processing equipment, in particular to a self-rotating ultrasonic flotation device with premixing function and method. BACKGROUND

[0002] In the prior art, the flotation device generally adopts single mechanical stirring to realize the mixing of ore pulp and the dispersion of bubbles. In this stirring mode, the matching of stirring intensity and flow field distribution is insufficient, which leads to uneven mixing of ore pulp and reagent, uneven distribution of bubble size, such as local overlarge bubbles or insufficient microbubbles, etc., resulting in low separation efficiency of useful minerals and gangue. In addition, although the flotation column is optimized in the separation space, it lacks targeted pretreatment links and is difficult to solve the problem of insufficient hydrophobicity adjustment of fine particle minerals, affecting the concentrate quality. SUMMARY

[0003] In order to solve the above technical problems, the present application provides a self-rotating ultrasonic flotation device with premixing function and method.

[0004] The first aspect of the present application provides a self-rotating ultrasonic flotation device with premixing function, comprising a premixing device and a flotation device; the premixing device is arranged above the flotation device. The premixing device comprises a premixing barrel and a pre-stirring mechanism; the top of the premixing barrel is provided with a barrel cover, and the first feeding port is arranged on the barrel cover; the bottom of the premixing barrel forms a discharge port communicated with the flotation barrel; the inner wall of the premixing barrel is provided with a spiral guide plate; the spiral guide plate and the inner wall of the premixing barrel form a guide groove; the pre-stirring mechanism comprises a pre-stirring driving assembly, a pre-stirring shaft, a pre-stirring assembly and an ultrasonic vibrator; the pre-stirring driving assembly is arranged on the barrel cover; the pre-stirring shaft penetrates through the barrel cover, one end of which is in transmission connection with the pre-stirring driving assembly, and the other end is provided with a pre-stirring assembly and an ultrasonic vibrator from top to bottom; The flotation device comprises a flotation barrel, a self-rotating ultrasonic and cleaning mechanism, a flotation stirring mechanism and a discharge mechanism; the bottom wall of the flotation barrel is provided with a discharge port; the discharge mechanism is arranged at the discharge port; the self-rotating ultrasonic and cleaning mechanism comprises a rotating driving assembly, a rotating frame body, an ultrasonic vibration plate and a spray head; the rotating driving assembly is arranged at the top of the flotation barrel, and the rotating frame body is fixedly connected below the rotating driving assembly; the ultrasonic vibration plate and the spray head are both fixedly arranged on the rotating frame body; the flotation stirring mechanism is arranged below the self-rotating ultrasonic and cleaning mechanism.

[0005] In some embodiments of the present application, the flotation stirring mechanism comprises a flotation stirring driving assembly, a flotation stirring shaft, a first flotation stirring assembly, and a second flotation stirring assembly. The flotation stirring driving assembly is arranged at the lower part of the flotation barrel and is in transmission connection with the flotation stirring shaft. The flotation stirring shaft penetrates the bottom wall of the flotation barrel. The first flotation stirring assembly and the second flotation stirring assembly are arranged at the upper end of the flotation stirring shaft.

[0006] In some embodiments of the present application, the first flotation stirring assembly comprises a plurality of groups of stirring blades arranged at intervals along the axial direction of the flotation stirring shaft. The length of each group of stirring blades extending along the radial direction is different.

[0007] In some embodiments of the present application, an air inlet channel is formed on the flotation stirring shaft. The second flotation stirring assembly comprises a plurality of air pipes arranged radially around the flotation stirring shaft. A plurality of air outlet holes are formed on each air pipe. Double helical blades are arranged on the outer circumferential surface of each air pipe.

[0008] In some embodiments of the present application, the ultrasonic vibration plate is arranged at intervals along the circumferential direction. The spray head comprises a plurality of groups of spray heads arranged at intervals along the axial direction. Each group comprises a plurality of spray heads arranged at intervals along the circumferential direction.

[0009] In some embodiments of the present application, a defoaming device is further included. An overflow port is arranged at the upper part of the flotation barrel, and an overflow groove is arranged at the overflow port. The defoaming device comprises a bubble scraping mechanism, a defoaming mechanism, and a spraying mechanism. The bubble scraping mechanism and the defoaming mechanism are arranged side by side on the overflow groove. The spraying mechanism is arranged above the bubble scraping mechanism and the defoaming mechanism.

[0010] In some embodiments of the present application, the bubble scraping mechanism comprises a bubble scraping driving assembly, a bubble scraping transmission shaft, and a scraper. The bubble scraping driving assembly is arranged on the overflow groove. The bubble scraping transmission shaft is rotatably arranged on the overflow groove and is in transmission connection with the bubble scraping driving assembly. The scraper is arranged on the bubble scraping transmission shaft.

[0011] In some embodiments of the present application, the defoaming mechanism comprises a defoaming driving assembly and a defoaming transmission shaft. The defoaming driving assembly is arranged on the overflow groove. The defoaming transmission shaft is rotatably arranged on the overflow groove and is in transmission connection with the defoaming driving assembly. A plurality of defoaming spines arranged in a helical manner along the axial direction are arranged on the outer circumferential surface of the defoaming transmission shaft.

[0012] In some embodiments of the present application, a circulating device is further included. A circulating discharge port is arranged on the side wall of the flotation barrel. A second feeding port is arranged on the cover of the premixing barrel. The circulating device connects the circulating discharge port and the second feeding port and is used for pumping the intermediate mineral into the premixing device.

[0013] In a second aspect of the present application, a flotation method of the self-rotating ultrasonic flotation device with premixing function is provided, and the method comprises the following steps: In step S1, the ore pulp to be treated and the reagent are added into the premixing barrel through the first feeding port; In step S2, the premixing shaft and the premixing assembly are rotated by the premixing driving assembly, and under the action of the premixing assembly, the mixed liquid in the premixing barrel moves from top to bottom along the spiral guide plate, and the ultrasonic vibrator generates ultrasonic vibration to act on the mixed liquid, so that the mixed liquid is premixed and pre-agitated, and the premixed mixed liquid enters the flotation barrel through the discharge port; In step S3, the rotating frame body is driven by the rotating driving assembly, and the ultrasonic vibration plate and the nozzle are rotated, and in the rotating process, the ultrasonic vibration plate works to further mix the mixed liquid and promote the action of the reagent and the mineral particles to enhance the flotation selectivity; In step S4, when the mixed liquid reaches the flotation stirring mechanism from top to bottom, the flotation stirring driving assembly drives the flotation stirring shaft and the first and second flotation stirring assemblies to rotate, so that the mixed liquid is further mixed; at the same time, in the rotating process, the exhaust holes of the second flotation stirring assembly exhaust air into the mixed liquid, the generated bubbles combine with the hydrophobic concentrate and drive the concentrate to move to the upper part of the flotation barrel; In step S5, the mixture of bubbles and concentrate moving to the upper part of the flotation barrel enters the overflow tank through the overflow port; the bubble and concentrate mixture is pushed to the defoaming mechanism by the scraping driving assembly driving the scraper to rotate, the defoaming driving assembly drives the defoaming transmission shaft to rotate, the defoaming thorn group continuously pierces the bubbles, and the concentrate is obtained; in this process, the intermediate mineral in the middle of the flotation barrel is sucked into the premixing barrel by the circulating device to realize the circulating mixing of the intermediate mineral; the hydrophilic tailings continuously sink and are discharged from the flotation barrel through the discharge mechanism.

[0014] Compared with the prior art, the self-rotating ultrasonic flotation device and method with premixing function have the following advantages and beneficial effects: the premixing device is arranged to perform ultrasonic pretreatment and pre-agitation on the mixture of ore pulp and flotation reagent, which can not only improve the mixing degree, but also adjust the hydrophobicity of the surface of fine particle grade minerals through ultrasonic action to lay a foundation for subsequent flotation separation; the flotation stirring mechanism is arranged to rotate two groups of flotation stirring assemblies in the same direction to form strong turbulent disturbance on the flotation ore pulp, and air is introduced into the flotation barrel while stirring, and uniform exhaust is realized through the self-rotating ultrasonic and cleaning mechanism to generate suitable flotation bubbles, thereby improving the combination efficiency of minerals and bubbles; the self-rotating ultrasonic and cleaning mechanism is arranged to realize ultrasonic global coverage in the flotation process, thereby enhancing the attachment efficiency of bubbles and hydrophobic minerals; at the same time, the inner wall and bottom wall of the flotation barrel can be cleaned to avoid mineral adhesion and accumulation.

[0015] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of this document. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which form a part of this document, are used to provide further understanding of the application and of the illustrative embodiments thereof, and are not intended for limitation of the application. In the drawings: Figure 1 is a structural schematic view of a self-rotating ultrasonic flotation device with premixing function provided by an exemplary embodiment of the present application; Figure 2 is a front view of a self-rotating ultrasonic flotation device with premixing function provided by an exemplary embodiment of the present application; Figure 3 is a Figure 2 sectional view at A-A in FIG. 1; Figure 4 is a structural schematic view of a premixing device provided by an exemplary embodiment of the present application; Figure 5 is a front view of a premixing device provided by an exemplary embodiment of the present application; Figure 6 is a Figure 5 sectional view at B-B in FIG. 2; Figure 7 is a structural schematic view of a self-rotating ultrasonic and cleaning mechanism provided by an exemplary embodiment of the present application; Figure 8 is a front view of a self-rotating ultrasonic and cleaning mechanism provided by an exemplary embodiment of the present application; Figure 9 is a Figure 8 sectional view at C-C in FIG. 3; Figure 10 is a structural schematic view of a flotation stirring mechanism provided by an exemplary embodiment of the present application; Figure 11 is a sectional view of a flotation stirring mechanism provided by an exemplary embodiment of the present application; Figure 12 is a structural schematic view of a defoaming device provided by an exemplary embodiment of the present application.

[0017] In the drawings: 10, premixing device; 20, flotation device; 30, defoaming device; 40, circulating device; 101, premixing barrel; 102, barrel cover; 103, ore pulp feeding pipe; 104, reagent feeding pipe; 105, discharge port; 106, spiral guide plate; 107, pre-stirring driving assembly; 108, pre-stirring shaft; 109, pre-stirring assembly; 110, ultrasonic vibrator; 201, flotation barrel; 202, self-rotating ultrasonic and cleaning mechanism; 2021, rotating driving assembly; 2021a, rotating driving unit; 2021b, upper track; 2021c, gear ring; 2021d, lower track; 2022, rotating frame body; 2023, ultrasonic vibration plate; 2024, shower head; 203, flotation stirring mechanism; 2031, flotation stirring driving assembly; 2032, flotation stirring shaft; 2032a, air inlet channel; 2033, first flotation stirring assembly; 2034, second flotation stirring assembly; 2034a, air pipe; 2034b, double helical blade; 204, discharging mechanism; 301, overflow tank; 302, bubble scraping mechanism; 3021, bubble scraping driving assembly; 3022, bubble scraping transmission shaft; 3023, scraper; 303, defoaming mechanism; 3031, defoaming driving assembly; 3032, defoaming transmission shaft; 3033, defoaming thorn group; 304, spraying mechanism; 3041, spraying driving assembly; 3042, spraying transmission assembly; 3043, spraying head. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other at will.

[0019] In the prior art, the flotation device generally adopts single mechanical stirring to realize ore pulp mixing and bubble dispersion. In this stirring mode, the matching of stirring intensity and flow field distribution is insufficient, which leads to uneven mixing of ore pulp and reagent, uneven distribution of bubble size, such as local overlarge bubbles or insufficient microbubbles, and thus leads to low separation efficiency of useful minerals and gangue. In addition, although the flotation column is optimized in the separation space, it lacks a targeted pretreatment link and is difficult to solve the problem of insufficient adjustment of the hydrophobicity of fine-grained minerals, which affects the concentrate quality.

[0020] Based on this, an exemplary embodiment of this application provides a self-rotating ultrasonic flotation device and method with a premixing function. This self-rotating ultrasonic flotation device with a premixing function, by setting up a premixing device, performs ultrasonic pretreatment and pre-stirring on the mixture of slurry and flotation reagents. This not only improves the degree of mixing but also adjusts the hydrophilicity / hydrophobicity of fine-grained mineral surfaces through ultrasonic action, laying the foundation for subsequent flotation separation. By setting up a flotation stirring mechanism, two sets of flotation stirring components rotate in the same direction, creating strong turbulent disturbance to the flotation slurry. While stirring, gas is introduced into the flotation tank, and the self-rotating ultrasonic and cleaning mechanism uniformly exhausts the gas, generating suitable flotation bubbles and improving the binding efficiency between minerals and bubbles. By setting up a self-rotating ultrasonic and cleaning mechanism, ultrasonic coverage of the entire flotation process is achieved, enhancing the adhesion efficiency of bubbles to hydrophobic minerals. Simultaneously, it can clean the inner and bottom walls of the flotation tank, preventing mineral adhesion and accumulation.

[0021] Example 1: An exemplary embodiment of this application provides a self-rotating ultrasonic flotation device with a premixing function, such as... Figures 1 to 3 As shown, the flotation equipment includes a premixing device 10 and a flotation device 20. The premixing device 10 is positioned above the flotation device 20. The slurry and reagents first enter the premixing device 10 for premixing, and then the premixed liquid enters the flotation device 20 for flotation. This multi-stage process enhances mixing uniformity, ensuring thorough mixing of the reagents and slurry and improving the hydrophobicity of fine-grained minerals. Positioning the premixing device 10 above the flotation device 20 not only achieves a compact layout of pretreatment and flotation through modular design, reducing the equipment's footprint, but also reduces fluctuations in slurry properties, ensuring stable operation of subsequent flotation processes.

[0022] like Figures 4 to 6As shown, the premixing device 10 comprises a premixing barrel 101, a premixing mechanism; the top of the premixing barrel 101 is provided with a barrel cover 102, and the barrel cover 102 is provided with a first feeding port; the first feeding port is circumferentially connected with a slurry feeding pipe 103, and the slurry feeding pipe 103 is provided with a liquid medicine feeding pipe 104; preferably, the slurry feeding pipe 103 extends along the tangent direction of the premixing barrel 101, and the included angle between the liquid medicine feeding pipe 104 and the end of the slurry feeding pipe 103 away from the liquid flow direction is an acute angle of 45°, so that the slurry and the liquid medicine injected into the premixing barrel 101 can form a high-speed rotational flow, and the initial mixing is realized by using the centrifugal force. The bottom of the premixing barrel 101 is conical and forms a discharge port 105 communicating with the flotation barrel 201. The premixing mechanism comprises a premixing driving assembly 107, a premixing shaft 108, a premixing assembly 109 and an ultrasonic vibrator 110; the premixing driving assembly 107 is arranged on the barrel cover 102; the premixing shaft 108 penetrates the barrel cover 102, one end of which is in transmission connection with the premixing driving assembly 107, and the other end is sequentially provided from top to bottom with the premixing assembly 109 and the ultrasonic vibrator 110. The premixing driving assembly 107 preferably comprises a motor and a belt driving assembly, the motor can drive the belt driving assembly to rotate and transmit power to the premixing shaft 108, so that the premixing shaft 108 drives the premixing assembly 109 and the ultrasonic vibrator to rotate synchronously. The premixing assembly 109 is preferably a horizontal stirring paddle, which comprises upper and lower stirring blades and a connecting blade connecting the upper and lower stirring blades, so that the initially mixed liquid entering the premixing barrel 101 is further mixed by the premixing assembly 109 to realize further mixing.

[0023] The inner wall of the premixing barrel 101 is provided with a spiral flow guide plate 106; the center of the spiral flow guide plate 106 is provided with a through hole for the premixing shaft 108 to penetrate; the initially mixed mixed liquid moves to the bottom of the premixing barrel 101 through the spiral flow guide plate 106, and the mixed liquid is further mixed; in the process of movement, the spiral flow guide plate 106 can prolong the mixing time and form turbulent flow, thereby improving the mixing effect. At the same time, the ultrasonic vibrator 110 rotates continuously, and the ultrasonic field generated thereby can cover the entire flow passage cross section, and the cavitation effect is used to further refine the liquid medicine droplets and promote the rapid adsorption of the liquid medicine on the mineral surface.

[0024] The premixing device 10 of the present application realizes initial mixing by the rotational flow of the slurry and the liquid medicine into the premixing barrel 101, further mixing by the premixing driving assembly 107, and further mixing assisted by the ultrasonic vibrator 110 and the spiral flow guide plate 106, so that the slurry and the liquid medicine entering the premixing device 10 are subjected to multi-stage premixing, thereby improving the uniformity of mixing, and at the same time, the hydrophobicity of the fine particle mineral surface is adjusted by ultrasonic action, thereby laying a foundation for subsequent flotation separation.

[0025] As Figure 2 and 3As shown, the flotation device 20 comprises a flotation barrel 201, a self-rotating ultrasonic and cleaning mechanism 202, a flotation stirring mechanism 203, and a discharge mechanism 204. The bottom wall of the flotation barrel 201 is provided with a discharge port. The discharge mechanism 204 is arranged at the discharge port. The tailings after flotation are discharged through the discharge mechanism 204 at the discharge port. Figures 7 to 9 As shown, the self-rotating ultrasonic and cleaning mechanism 202 comprises a rotating drive assembly 2021, a rotating frame body 2022, an ultrasonic vibration plate 2023, and a spray head 2024. The rotating drive assembly 2021 is arranged at the top of the flotation barrel 201. The rotating drive assembly 2021 comprises a rotating drive unit 2021a, a gear, an upper track 2021b, a gear ring 2021c, and a lower track 2021d. The rotating drive unit 2021a is a motor and is in transmission connection with the gear. The gear is in transmission connection with the gear ring 2021c. The gear ring 2021c is provided with roller assemblies on both sides. The roller assemblies are arranged in the upper track 2021b and the lower track 2021d, respectively. The upper track 2021b is fixedly connected with the top cover of the flotation barrel 201. The lower track 2021d is fixedly connected with the side wall of the flotation barrel 201. The rotating drive unit 2021a is arranged on the lower track 2021d. The rotating drive unit 2021a can drive the gear ring 2021c to rotate and drive the rotating frame body 2022 to rotate. The rotating frame body 2022 is fixedly connected below the gear ring 2021c of the rotating drive assembly 2021. The ultrasonic vibration plate 2023 and the spray head 2024 are both fixedly arranged on the rotating frame body 2022. Preferably, the ultrasonic vibration plate 2023 has a plurality of ultrasonic vibration plates, which are arranged in a circumferential direction. The ultrasonic vibration plates can realize ultrasonic global coverage in the flotation process, improve the mixing uniformity of the ore slurry and the liquid medicine, increase the collision probability between the bubbles and the hydrophobic concentrate, strengthen the adhesion between the bubbles generated by the second flotation stirring assembly 2034 and the hydrophobic minerals, and improve the extraction capacity of the concentrate. The spray head 2024 has a plurality of groups. The outer spray pipes of the spray head 2024 are connected with pumps. The plurality of groups of spray heads 2024 are arranged in an axial direction. The plurality of groups of spray heads 2024 are arranged in multiple layers. Each group comprises a plurality of spray heads 2024 arranged in a circumferential direction. When the spray head 2024 sprays the cleaning liquid, the spray range of the spray head 2024 can cover the inner wall of the flotation barrel 201, so that the mineral adhesion and accumulation on the inner wall of the flotation barrel 201 can be avoided. During the flotation process and after the completion of the flotation, the cleaning liquid can be sprayed into the flotation barrel 201 through the spray head 2024, so that the adhesion of the ore slurry on the barrel wall of the flotation barrel 201 can be avoided. The online maintenance of the equipment can reduce the subsequent manual cleaning cost and ensure the long-term stable operation of the equipment.

[0026] As shown, the flotation stirring mechanism 203 is arranged at the lower part of the self-rotating ultrasonic and cleaning mechanism 202. Figure 3 As shown, the flotation stirring mechanism 203 is arranged at the lower part of the self-rotating ultrasonic and cleaning mechanism 202. Figure 10 and 11As shown, the flotation stirring mechanism 203 comprises a flotation stirring driving assembly 2031, a flotation stirring shaft 2032, a first flotation stirring assembly 2033, and a second flotation stirring assembly 2034. The flotation stirring driving assembly 2031 is arranged at the lower part of the flotation barrel 201, preferably a motor, and is in transmission connection with the flotation stirring shaft 2032. The flotation stirring shaft 2032 penetrates the bottom wall of the flotation barrel 201. The first flotation stirring assembly 2033 and the second flotation stirring assembly 2034 are arranged at the upper end of the flotation stirring shaft 2032. The flotation stirring driving assembly 2031 can synchronously drive the first flotation stirring assembly 2033 and the second flotation stirring assembly 2034 to rotate, so as to further mix the mixed liquid of the ore pulp and the liquid medicine.

[0027] For example, the first flotation stirring assembly 2033 comprises a plurality of groups of stirring blades arranged along the axial direction of the flotation stirring shaft 2032. The length of each group of stirring blades extending along the radial direction is different from each other. The bending curvature of each group of stirring blades is different from each other. Preferably, in the present application, the first flotation stirring assembly 2033 comprises two groups of stirring blades arranged above and below each other. The length of the upper group of stirring blades is shorter than that of the lower group of stirring blades, so that a step shear field is generated in the flotation barrel 201, an axial and radial composite flow field is formed, the outer periphery of the longer stirring blades generates strong turbulent flow, which can break the agglomeration of the ore pulp and promote the dispersion of bubbles, and the shorter stirring blades can enhance the circulation of the mixed liquid in the central region and avoid the generation of a central dead zone. For example, the upper stirring blades have a first section extending along the radial direction and a second section arranged obliquely to the first section. The first section and the second section are arranged at an included angle therebetween. The structure is light and has small stirring resistance, and can increase the stirring range and enhance the mixing effect. The lower stirring blades are arranged helically and obliquely along the outer periphery of the flotation stirring shaft 2032. Each stirring blade has a wave-shaped structure. The curved wave structure can generate vortex turbulent flow, enhance the radial diffusion capacity, and improve the local turbulent flow intensity. The upper stirring blades can form an axial circulation to guide the flow field during the stirring process. The lower stirring blades can strengthen the radial shear to disperse bubbles.

[0028] The air inlet channel 2032a is formed on the flotation stirring shaft 2032, and the bottom of the air inlet channel 2032a is connected to the Roots blower; the second flotation stirring assembly 2034 comprises a plurality of air pipes 2034a which are arranged radially around the flotation stirring shaft 2032; a plurality of air outlet holes are formed on each air pipe 2034a, so that the gas can be introduced into the flotation barrel 201 through the flotation stirring shaft 2032 and the air pipe 2034a, the gas enters the flotation barrel 201 through the air outlet holes and forms micro-bubbles with a diameter of 0.1-0.5 mm, the micro-bubbles combine with the hydrophobic minerals, and the hydrophobic minerals can be driven to move upward in the flotation barrel 201, so as to realize the separation of the concentrate and the tailings; the radial arrangement of the air pipes 2034a can ensure that the bubbles are uniformly released in the whole region, avoid local accumulation of the bubbles, and make the bubbles better combine with the hydrophobic minerals, thereby improving the combination effect; the double helical blades 2034b are arranged on the outer circumferential surface of each air pipe 2034a, the double helical blades 2034b can prolong the residence time of the bubbles, so that the bubbles and the hydrophobic minerals can be fully combined, and the separation effect of the concentrate is improved.

[0029] After the hydrophobic minerals combine with the bubbles, the hydrophobic minerals move upward along the flotation barrel 201 under the driving of the bubbles, move to the overflow port, and enter the overflow tank to become the concentrate. The hydrophilic minerals move to the lower part of the flotation barrel 201 to become the tailings which are discharged through the discharge mechanism 204.

[0030] In order to improve the utilization rate and separation effect of the ore slurry, the application further comprises a circulating device 40; the circulating discharge port 105 is arranged on the side wall of the flotation barrel 201; the circulating discharge port 105 is preferably arranged on the side wall at the height position of the first flotation stirring assembly 2033; the second feeding port is arranged on the barrel cover 102 of the premixing barrel 101; the circulating device 40 is connected to the circulating discharge port 105 and the second feeding port, and is used for pumping the intermediate minerals into the premixing device 10. The mixed intermediate minerals can enter the premixing device 10 again through the circulating discharge port 105, and are premixed and floated again, so as to reduce resource waste.

[0031] Preferably, the flotation equipment of the application further comprises a defoaming device 30; the upper part of the flotation barrel 201 is provided with an overflow port, and the overflow tank 301 is installed at the overflow port; when the bubbles drive the concentrate to move into the overflow tank, the defoaming device 30 can be used to pierce the bubbles in order to obtain the concentrate. As shown in Figure 12 The defoaming device 30 comprises a bubble scraping mechanism 302, a defoaming mechanism 303 and a spraying mechanism 304; the bubble scraping mechanism 302 and the defoaming mechanism 303 are arranged side by side on the overflow tank 301; and the spraying mechanism 304 is arranged above the bubble scraping mechanism 302 and the defoaming mechanism 303.

[0032] The bubble scraping mechanism 302 comprises a bubble scraping driving assembly 3021, a bubble scraping transmission shaft 3022 and a scraping plate 3023. The bubble scraping driving assembly 3021 is arranged on the overflow tank 301. The bubble scraping transmission shaft 3022 is rotatably arranged on the overflow tank 301 and is in transmission connection with the bubble scraping driving assembly 3021. The scraping plate 3023 is arranged on the bubble scraping transmission shaft 3022. Preferably, the scraping plate 3023 is two and is symmetrically arranged on the bubble scraping transmission shaft 3022. The bubble scraping driving assembly 3021 is preferably an electric motor which can drive the scraping plate 3023 to rotate continuously and push the bubbles and the mineral carried by the bubbles to the bubble removing mechanism 303.

[0033] The bubble removing mechanism 303 comprises a bubble removing driving assembly 3031 and a bubble removing transmission shaft 3032. The bubble removing driving assembly 3031 is arranged on the overflow tank 301. The bubble removing transmission shaft 3032 is rotatably arranged on the overflow tank 301 and is in transmission connection with the bubble removing driving assembly 3031. The outer circumferential surface of the bubble removing transmission shaft 3032 is provided with bubble removing spikes 3033 which are arranged in a spiral along the axial direction. The bubble removing driving assembly 3031 is an electric motor which can drive the bubble removing transmission shaft 3032 to rotate, so that the bubbles entering the bubble removing spikes 3033 are continuously broken by the spikes of the bubble removing spikes 3033 and the concentrate is released.

[0034] The spraying mechanism 304 comprises a spraying driving assembly 3041, a spraying transmission assembly 3042 and a spraying head 3043. The spraying driving assembly 3041 is in transmission connection with the spraying transmission assembly 3042. The spraying head 3043 is arranged on the spraying transmission assembly 3042. The spraying driving assembly 3041 is preferably an electric motor. The spraying transmission assembly 3042 is a lead screw which can drive the spraying head 3043 to move above the bubble scraping mechanism 302 and the bubble removing mechanism 303, so as to flush the bubble scraping mechanism 302 and the bubble removing mechanism 303 in time and assist in removing bubbles and prevent bubbles from remaining.

[0035] Embodiment 2: An embodiment of the application provides a flotation method of the self-rotating ultrasonic flotation device with a premixing function as described in the embodiments, which comprises the following steps: In step S1, the mineral slurry and the reagent to be treated are added into the premixing barrel 101 through the first feeding port. Meanwhile, the intermediate mineral can also be added into the premixing barrel 101 through the second feeding port, so that the mineral slurry, the reagent and the intermediate mineral injected into the premixing barrel 101 can form a high-speed rotational flow and realize preliminary mixing by using centrifugal force.

[0036] Step S2, the pre-stirring driving assembly 107 drives the pre-stirring shaft 108 and the pre-stirring assembly 109 to rotate, under the action of the pre-stirring assembly 109, the mixed liquid in the pre-mixing barrel 101 moves from top to bottom along the spiral guide plate 106, meanwhile, the ultrasonic vibrator 110 generates ultrasonic vibration to act on the mixed liquid, so that the mixed liquid realizes pre-mixing and pre-stirring, and the pre-mixed mixed liquid enters the flotation barrel 201 through the discharge port 105; Step S3, the rotary driving assembly 2021 drives the rotary frame body 2022 and the ultrasonic vibration plate 2023 and the spray head 2024 to rotate, in the process of rotation, the ultrasonic vibration plate 2023 works, so that the mixed liquid is further mixed and the mixing uniformity is improved, and the action of the medicament and the mineral particles is promoted, and the flotation selectivity is enhanced; the spray head 2024 can synchronously spray cleaning liquid to prevent the mineral from adhering to the inner wall of the flotation barrel 201, and the spray head 2024 can also not work.

[0037] Step S4, when the mixed liquid reaches the flotation stirring mechanism 203 from top to bottom, the flotation stirring driving assembly 2031 drives the flotation stirring shaft 2032 and the first flotation stirring assembly 2033 and the second flotation stirring assembly 2034 to rotate, so that the mixed liquid is further mixed; meanwhile, in the process of rotation, the exhaust hole of the second flotation stirring assembly 2034 exhausts to the mixed liquid, the formed bubbles combine with the hydrophobic concentrate and drive the concentrate to move to the upper part of the flotation barrel 201; Step S5, the mixture of bubbles and concentrate moving to the upper part of the flotation barrel 201 enters the overflow tank 301 through the overflow port; the bubble scraping driving assembly 3021 drives the scraper 3023 to rotate and push the mixture of bubbles and concentrate to the defoaming mechanism 303, the defoaming driving assembly 3031 drives the defoaming transmission shaft 3032 to rotate, so that the defoaming thorn group 3033 constantly pierces the bubbles to obtain the concentrate; in this process, the circulating device 40 sucks the intermediate mineral in the middle part of the flotation barrel 201 into the pre-mixing barrel 101 to realize the circulating mixing of the intermediate mineral; the hydrophilic tailings continuously sink and are discharged from the flotation barrel 201 through the discharge mechanism 204.

[0038] In this application, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that the articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or also include the elements inherent to such articles or devices. Without more limitations, the elements defined by the statement "comprising" do not exclude the presence of other identical elements in the articles or devices including the elements.

[0039] While the preferred embodiments of the application have been described, additional variations and modifications can be made to these embodiments by those skilled in the art once they have the benefit of the present disclosure without departing from the spirit and scope of the application. Accordingly, it is intended that such additions and modifications be included within the scope of the application. It is the following claims, including any amendments thereto, which define the scope of the application.

[0040] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A self-rotating ultrasonic flotation device with premixing function, characterized in that, It includes a premixing device (10) and a flotation device (20); the premixing device (10) is disposed above the flotation device (20); The premixing device (10) includes a premixing tank (101) and a pre-stirring mechanism; a tank cover (102) is provided on the top of the premixing tank (101), and a first feed inlet is provided on the tank cover (102); a discharge port (105) communicating with a flotation tank (201) is formed at the bottom of the premixing tank (101); a spiral guide plate (106) is provided on the inner wall of the premixing tank (101); the spiral guide plate (106) and the inner wall of the premixing tank (101) are... A guide channel is formed between the two sides; the pre-stirring mechanism includes a pre-stirring drive assembly (107), a pre-stirring shaft (108), a pre-stirring assembly (109), and an ultrasonic transducer (110); the pre-stirring drive assembly (107) is disposed on the bucket cover (102); the pre-stirring shaft (108) passes through the bucket cover (102), one end of which is connected to the pre-stirring drive assembly (107) for transmission, and the other end is respectively provided with the pre-stirring assembly (109) and the ultrasonic transducer (110) from top to bottom; The flotation device (20) includes a flotation tank (201), a self-rotating ultrasonic and cleaning mechanism (202), a flotation stirring mechanism (203), and a discharge mechanism (204). A discharge port is provided on the bottom wall of the flotation tank (201). The discharge mechanism (204) is located at the discharge port. The self-rotating ultrasonic and cleaning mechanism (202) includes a rotary drive assembly (2021), a rotary frame (2022), an ultrasonic vibrating plate (2023), and a nozzle (2024). The rotary drive assembly (2021) is located at the top of the flotation tank (201), and the rotary frame (2022) is fixedly connected to the bottom of the rotary drive assembly (2021). The ultrasonic vibrating plate (2023) and the nozzle (2024) are both fixedly mounted on the rotary frame (2022). The flotation stirring mechanism (203) is located at the bottom of the self-rotating ultrasonic and cleaning mechanism (202).

2. The self-rotating ultrasonic flotation device with premixing function according to claim 1, characterized in that, The flotation stirring mechanism (203) includes a flotation stirring drive assembly (2031), a flotation stirring shaft (2032), a first flotation stirring assembly (2033), and a second flotation stirring assembly (2034). The flotation stirring drive assembly (2031) is disposed at the lower part of the flotation tank (201) and is connected to the flotation stirring shaft (2032) in a driving manner. The flotation stirring shaft (2032) passes through the bottom wall of the flotation tank (201). The first flotation stirring assembly (2033) and the second flotation stirring assembly (2034) are spaced apart at the upper end of the flotation stirring shaft (2032).

3. The self-rotating ultrasonic flotation device with premixing function according to claim 2, characterized in that, The first flotation stirring assembly (2033) includes multiple sets of stirring blades arranged axially along the flotation stirring shaft (2032), and the lengths of each set of stirring blades extending radially are not equal.

4. The self-rotating ultrasonic flotation device with premixing function according to claim 2, characterized in that, An air inlet channel (2032a) is formed on the flotation stirring shaft (2032); the second flotation stirring assembly (2034) includes a plurality of air pipes (2034a) arranged radially around the flotation stirring shaft (2032); a plurality of exhaust holes are formed on each air pipe (2034a); and a double helical blade (2034b) is provided on the outer peripheral surface of each air pipe (2034a).

5. The self-rotating ultrasonic flotation device with premixing function according to claim 1, characterized in that, There are multiple ultrasonic transducers (2023) arranged at intervals along the circumferential direction; there are multiple sets of nozzles (2024), and the multiple sets of nozzles (2024) are arranged at intervals along the axial direction, each set including multiple nozzles (2024) arranged at intervals along the circumferential direction.

6. The self-rotating ultrasonic flotation device with premixing function according to claim 1, characterized in that, It also includes a defoaming device (30); the upper part of the flotation tank (201) is provided with an overflow port, and an overflow trough (301) is installed at the overflow port; the defoaming device (30) includes a foam scraping mechanism (302), a defoaming mechanism (303) and a spraying mechanism (304); the foam scraping mechanism (302) and the defoaming mechanism (303) are arranged side by side on the overflow trough (301); the spraying mechanism (304) is arranged above the foam scraping mechanism (302) and the defoaming mechanism (303).

7. The self-rotating ultrasonic flotation device with premixing function according to claim 6, characterized in that, The bubble scraping mechanism (302) includes a bubble scraping drive assembly (3021), a bubble scraping transmission shaft (3022), and a scraper (3023); the bubble scraping drive assembly (3021) is disposed on the overflow trough (301); the bubble scraping transmission shaft (3022) is rotatably disposed on the overflow trough (301) and is connected to the bubble scraping drive assembly (3021) in a transmission manner; the scraper (3023) is disposed on the bubble scraping transmission shaft (3022).

8. The self-rotating ultrasonic flotation device with premixing function according to claim 6, characterized in that, The defoaming mechanism (303) includes a defoaming drive assembly (3031) and a defoaming transmission shaft (3032); the defoaming drive assembly (3031) is disposed on the overflow groove (301); the defoaming transmission shaft (3032) is rotatably disposed on the overflow groove (301) and is connected to the defoaming drive assembly (3031) in a transmission manner; the outer circumferential surface of the defoaming transmission shaft (3032) is provided with a defoaming spike group (3033) arranged spirally along the axial direction.

9. The self-rotating ultrasonic flotation device with premixing function according to claim 1, characterized in that, It also includes a circulation device (40); a circulation outlet (105) is provided on the side wall of the flotation tank (201); a second feed inlet is provided on the lid (102) of the premixing tank (101); the circulation device (40) connects the circulation outlet (105) and the second feed inlet, and is used to pump intermediate minerals into the premixing device (10).

10. A flotation method for a self-rotating ultrasonic flotation device with premixing function as described in any one of claims 1 to 9, characterized in that, The method includes the following steps: Step S1: Add the slurry and reagents to be treated into the premixing tank (101) through the first feed inlet; In step S2, the pre-stirring drive assembly (107) drives the pre-stirring shaft (108) to rotate the pre-stirring assembly (109). Under the action of the pre-stirring assembly (109), the mixed liquid in the premixing tank (101) moves from top to bottom along the spiral guide plate groove. At the same time, the ultrasonic transducer (110) generates ultrasonic vibrations that act on the mixed liquid, so that the mixed liquid is premixed and pre-stirred. The premixed mixed liquid enters the flotation tank (201) through the discharge port (105). In step S3, the rotary drive assembly (2021) drives the rotary frame (2022) and drives the ultrasonic vibrating plate (2023) and the nozzle (2024) to rotate. During the rotation, the ultrasonic vibrating plate (2023) works, which further mixes the mixed liquid and promotes the interaction between the reagent and the mineral particles, thereby enhancing the flotation selectivity. In step S4, when the mixed liquid reaches the flotation stirring mechanism (203) from top to bottom, the flotation stirring drive assembly (2031) drives the flotation stirring shaft (2032) and drives the first flotation stirring assembly (2033) and the second flotation stirring assembly (2034) to rotate, so that the mixed liquid is further mixed; at the same time, during the rotation, the exhaust hole of the second flotation stirring assembly (2034) exhausts gas into the mixed liquid, and the formed bubbles combine with the hydrophobic concentrate and drive the concentrate to move towards the upper part of the flotation tank (201); In step S5, the mixture of bubbles and concentrate moving to the upper part of the flotation tank (201) enters the overflow tank (301) through the overflow port; the bubble scraping drive assembly (3021) drives the scraper (3023) to rotate and push the mixture of bubbles and concentrate to the defoaming mechanism (303). The defoaming drive assembly (3031) drives the defoaming transmission shaft (3032) to rotate, so that the defoaming spike assembly (3033) continuously punctures the bubbles to obtain concentrate; during this process, the circulation device (40) sucks the intermediate minerals in the middle of the flotation tank (201) into the premixing tank (101) to realize the circulation mixing of intermediate minerals; the hydrophilic tailings continuously sink and are discharged from the flotation tank (201) through the discharge mechanism (204).

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