Rotational flow cavitation coupled micro-fine particle mineral flotation equipment

Abstract

The utility model provides a cyclone cavitation coupled micro-fine particle mineral flotation device. Comprising a flotation body and a cavitation bubble generator. The flotation body comprises a flotation body cylindrical barrel located on the upper portion and used for raw ore feeding and concentrate collecting, a flotation body conical pipe located on the lower portion and used for separation and tailing discharging, a raw ore feeding pipe arranged at the axis of the flotation body cylindrical barrel, and a pressure stabilizing plate. Hydrodynamic cavitation bubbles generated by a cavitation bubble generator are applied to flotation equipment and are fed into a stirring area of the flotation equipment under pressure, the cavitation bubbles collapse to generate shock waves to clean the surfaces of mineral particles, the effect of dispersing minerals is achieved, special microbubbles are released to form mineralized bubbles with micro-fine particle concentrate, and the mineralized bubbles float upwards; the recovery rate of micro-fine particle minerals difficult to float is remarkably increased, the dosage of reagents is reduced, and efficient flotation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-fine mineral flotation technology and mineral flotation equipment, in particular to a cyclone cavitation coupled micro-fine mineral flotation equipment. Background Art

[0002] Flotation is the main method for selecting fine-grained minerals, but the flotation process currently used is often ineffective in selecting fine-grained minerals. Due to the large specific surface area and high surface energy of fine-grained minerals, these characteristics deteriorate the flotation environment of fine-grained slurry, making it difficult for fine-grained minerals to adhere to bubbles to form mineralized bubbles. The selectivity of conventional flotation agents is poor, resulting in a large number of useful minerals that cannot be effectively recovered and lost. Based on the distribution characteristics of my country's mineral resources and the increasingly impoverished and fine-mixed mining resources, mineral processing workers are paying more and more attention to the flotation of fine-grained minerals. The research on flotation process equipment of fine-grained minerals has become one of the important topics in the field of fine-grained mineral processing.

[0003] In general theory, bubble sizes have different selectivities. Large bubbles are suitable for coarse-grained mineral flotation, while small bubbles are suitable for fine-grained mineral flotation. An important issue in the flotation of fine-grained minerals is how to introduce small bubbles into the flotation.

[0004] In recent years, mineral processing workers have conducted extensive research on how to improve the structural characteristics of flotation equipment to overcome the fine particle mass effect and surface effect of fine particle ore, thereby improving the flotation efficiency of fine particles. Many new and effective fine particle flotation equipment have emerged.

[0005] The invention patent with publication number CN108339673A provides a cavitation jet flotation bubble generator and a flotation device. The flotation device includes a cavitation jet flotation bubble generator, a flotation tank and a concentrate overflow tank. A downcomer is provided at the bottom of the cavitation jet flotation bubble generator, a pulp distribution head is connected to the bottom of the downcomer, the pulp distribution head and the downcomer are arranged in the flotation tank, a tailings discharge port is opened at the bottom of the flotation tank, a concentrate overflow tank is arranged outside the flotation tank, and a concentrate outlet is arranged in the concentrate overflow tank. However, the flotation device has the technical defect of poor foam flotation effect.

[0006] In view of this, it is necessary to design an improved micro-fine mineral flotation equipment for cyclone cavitation coupling to solve the above problems. Utility Model Content

[0007] The utility model aims to provide a micro-fine mineral flotation device for cyclone cavitation coupling.

[0008] In order to achieve the above-mentioned utility model purpose, the utility model provides a cyclonic cavitation coupled micro-fine mineral flotation equipment, which includes a flotation body and a cavitation bubble generator;

[0009] The flotation body comprises a flotation body cylindrical barrel located at the upper part and used for raw ore feeding and concentrate collection, a flotation body conical tube located at the lower part and used for tailings discharge, a raw ore feeding pipe arranged at the axis of the flotation body cylindrical barrel, and a pressure stabilizing plate;

[0010] The pressure stabilizing plate is slidably connected or bolted to the annular inner wall of the cylindrical cylinder of the flotation body, so that the pressure stabilizing plate is in a position separating the foam and the watertight area;

[0011] The voltage stabilizing plate is provided with a middle through hole, and the raw ore feeding pipe passes through the middle through hole.

[0012] As a further improvement of the utility model, a porous structure is provided on the voltage stabilizing plate.

[0013] As a further improvement of the utility model, the porous aperture of the voltage stabilizing plate is 1 to 2 mm.

[0014] As a further improvement of the utility model, the cavitation bubble generator includes a high-pressure water pump and a cavitation bubble generating device.

[0015] As a further improvement of the utility model, a lower water inlet pipe opening is arranged on the lower side wall of the cylindrical cylinder of the flotation body, and is connected to the pipe opening of the cavitation bubble generator along a tangent, an involute or a spiral line.

[0016] As a further improvement of the utility model, an annular concentrate collecting trough is arranged on the top outer wall of the cylindrical cylinder of the flotation body.

[0017] As a further improvement of the utility model, a concentrate discharge port is provided on the annular concentrate collecting trough.

[0018] As a further improvement of the utility model, a tailings discharge port is provided at the bottom of the conical tube of the flotation body.

[0019] As a further improvement of the utility model, the cylindrical body of the flotation body and the conical body of the flotation body are cooperatively connected; the lower water inlet pipe opening is arranged at the connection position of the cylindrical body of the flotation body and the conical body of the flotation body.

[0020] As a further improvement of the utility model, the raw ore feeding pipe is fixedly connected to the feed port at the top of the cylindrical cylinder of the flotation body.

[0021] The beneficial effects of the utility model are:

[0022] 1. The cyclone cavitation coupled fine-grained mineral flotation equipment provided by the utility model uses hydraulic cavitation bubbles generated by a cavitation bubble generator in the flotation equipment, which are pressurized into the stirring zone of the flotation equipment. The cavitation bubbles collapse to generate shock waves to clean the surface of mineral particles, thereby achieving the effect of dispersing minerals, and releasing special microbubbles to form mineralized bubbles with fine-grained concentrates to float, which significantly improves the recovery rate of difficult-to-float fine-grained minerals, reduces the dosage of reagents, and realizes efficient flotation.

[0023] 2. The cyclone cavitation coupled fine-particle mineral flotation equipment provided by the utility model forms a self-entraining cyclone separation zone in the conical tube of the flotation body by regulating the water flow velocity of the cavitation bubble generator. By adjusting the porous pressure stabilizing plate to a suitable separation position between the foam layer and the watertight area, it can play a role in relatively stabilizing the water pressure of the lower conical tube and maintain a stable ore feeding speed. The pre-slurry ore sample is injected into the flotation body, and the mineralized foam flow rises to the annular concentrate collecting tank, and the tailings are discharged from the bottom discharge port, thereby significantly improving the flotation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of the cyclone cavitation coupled micro-fine mineral flotation equipment provided by the utility model.

[0025] Reference numerals

[0026] 1-Ore feeding pipe; 2-Concentrate discharge port; 3-Pressure stabilizing plate; 4-Cavitation bubble generating device; 5-High-pressure water pump; 6-Lower water inlet pipe; 7-Flotation body cylindrical cylinder; 8-Flotation body conical tube; 9-Tailings discharge port. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0029] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0030] See also Figure 1As shown, the utility model provides a cyclonic cavitation coupled micro-fine mineral flotation device, which includes a flotation body part and a cavitation bubble generator.

[0031] The upper end of the flotation body is provided with a feed inlet and an annular concentrate collecting tank, the lower end is provided with a tailings discharge outlet, and the middle part is provided with a porous structure stabilizing plate 3 through which mineralized microbubbles can pass.

[0032] In some embodiments, the flotation body includes a flotation body cylindrical cylinder 7 located at the upper part and used for raw ore feeding and concentrate collection, a flotation body conical tube 8 located at the lower part and used for tailings discharge, an raw ore feeding pipe 1 arranged at the axial center position of the inner cavity of the cylinder of the flotation body cylindrical cylinder, and a pressure stabilizing plate 3.

[0033] See also Figure 1 As shown, the stabilizing plate 3 is provided with a middle through hole, and the raw ore feeding pipe passes through the middle through hole. That is, the raw material feeding pipe 1 is inserted into the porous stabilizing plate 3, the lower end of the pipe opening leads to the flotation body conical tube body 8, and the upper end of the pipe opening is connected to the feed port at the top of the flotation body cylindrical barrel 7.

[0034] In addition, a porous structure is arranged on the voltage stabilizing plate 3, and the porous pore diameter is 1-2 mm.

[0035] In some embodiments, the pressure stabilizing plate 3 is slidably connected or bolted to the annular inner wall of the cylindrical barrel 7 of the flotation body, so that the position of the pressure stabilizing plate 3 can be adjusted during the flotation process so that it is always in a suitable separation position between the foam and the watertight area, so that the mineralized microbubbles can pass through the pressure stabilizing plate 3, and the microbubbles and the slurry are effectively separated, which can play a role in relatively stabilizing the water pressure of the lower conical tube body.

[0036] The flotation body cylindrical barrel 7 includes an annular concentrate collecting trough, a concentrate discharge port 2 and a lower water inlet pipe port 6 .

[0037] The annular concentrate collecting trough is arranged on the outer wall of the top of the flotation body cylindrical cylinder 7, and the concentrate discharge port 2 is arranged at the bottom end of the annular concentrate collecting trough for recovering the concentrate.

[0038] The flotation body cylindrical barrel 7 and the flotation body conical tube 8 are connected in a cooperative manner; the lower water inlet pipe 6 is arranged at the connection position of the flotation body cylindrical barrel 7 and the flotation body conical tube 8.

[0039] See also Figure 1 As shown, the cavitation bubble generator includes a high-pressure water pump 5 and a cavitation bubble generating device 4.

[0040] The lower water inlet pipe opening 6 is connected to the pipe opening of the cavitation bubble generator 4 along a tangent line, an involute line or a spiral line.

[0041] The high-pressure cavitation bubble water flow generated by the cavitation bubble generator enters the inner cavity of the flotation body through the water inlet port 6 at the bottom of the flotation body cylindrical barrel 7. The cavitation bubble collapses to generate shock waves, releases a large number of special nano-microbubbles, and forms a self-entraining vortex. After the slurry and the reagent are pre-mixed, the raw material feed pipe 1 fixedly arranged at the axis of the flotation body cylindrical barrel 7 enters the flotation body conical tube 8 under the stabilizing plate 3. The surface of the mineral particles is affected by the collapse of the cavitation bubbles and is fully loosened to form fine and stable mineralized bubbles, which float up through the porous stabilizing plate 3 to the annular concentrate collection tank arranged outside the top to become the final concentrate, and the tailings are discharged from the lower tailings discharge port 9.

[0042] The working mechanism and operation mode of the cyclone cavitation coupled fine-grained mineral flotation equipment provided by the utility model are:

[0043] Step 1: Turn on the high-pressure water pump 5 and the cavitation bubble generating device 4 in the cavitation bubble generator, adjust the water flow speed to 5-20m / s, the cavitation bubbles collapse to generate shock waves, release a large number of special nano-microbubbles, and form a self-entraining cyclone separation zone in the conical tube 8 of the flotation body;

[0044] Step 2: Adjust the porous stabilizing plate 3 to a suitable separation position between the foam and the watertight area;

[0045] Step 3: Turn on the slurry pump, maintain a stable feeding speed of 10-15m / s, feed through the raw ore feeding pipe 1, inject the pre-slurry sample into the flotation body, and the surface of the mineral particles is affected by the collapse of cavitation bubbles and is fully loosened to form fine and stable mineralized bubbles, which float up through the porous voltage stabilizing plate 3 to the annular concentrate collection trough set outside the top, and the concentrate is collected through the concentrate discharge port 2, and the tailings are discharged from the tailings discharge port 9 at the bottom.

[0046] The specific application of the cyclone cavitation coupled fine-grained mineral flotation equipment is further explained below in conjunction with a specific example of minerals from a mine in Tibet.

[0047] The mineral in a mine in Tibet is fine-grained chalcopyrite, with 85% of the suspended particle size below 38μm and the slurry mass concentration of 30%.

[0048] When using the cyclone cavitation coupled fine-grained mineral flotation equipment for application operation tests, the flotation agent and the ore sample are first added in a mixing barrel in a certain proportion for pre-slurry adjustment. After stirring for 3 minutes, the collector is added. Under the condition of a cavitation water flow velocity of 10m / s, the recovery rate of molybdenum, which is extremely difficult to recover, reaches 75%, which is much higher than the recovery rate of about 40% of conventional flotation equipment, indicating that the cyclone cavitation coupled fine-grained mineral flotation equipment has a strong fine-grained mineral flotation recovery capacity.

[0049] In summary, the utility model provides a cyclone cavitation coupled fine-grained mineral flotation equipment, which includes a cylindrical flotation body part and a cavitation bubble generator. A feed port and an annular concentrate collection tank are arranged at the upper end of the flotation body, a tailings discharge port is arranged at the lower end, and a porous voltage stabilizing plate through which mineralized microbubbles can pass is arranged in the middle. The cavitation bubble water generated by the cavitation bubble generator is fed into the device under pressure, and special nano-microbubbles are released in the conical tube body of the flotation body at the lower part of the flotation equipment, and a self-entraining cyclone is generated, which quickly forms a mineralized floatation with the mineral particles in the raw ore feed pipe to form a concentrate. The hydraulic cavitation bubbles generated by the cavitation bubble generator are applied in the flotation equipment, and are fed into the stirring zone of the flotation equipment under pressure. The cavitation bubble collapses to generate a shock wave to clean the surface of the mineral particles, thereby achieving the effect of dispersing the minerals, and releasing special microbubbles to form mineralized bubbles with the fine-grained concentrate to float, which significantly improves the recovery rate of difficult-to-float fine-grained minerals, reduces the dosage of reagents, and realizes efficient flotation.

[0050] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A cyclonic cavitation coupled micro-fine mineral flotation device, characterized in that: including a flotation body and a cavitation bubble generator; The flotation body comprises a flotation body columnar barrel located at the upper part and used for raw ore feeding and concentrate collection, a flotation body conical tube located at the lower part and used for sorting and tailings discharge, a raw ore feeding pipe arranged at the axis of the flotation body columnar barrel, and a pressure stabilizing plate; The pressure stabilizing plate is slidably connected or bolted to the annular inner wall of the cylindrical cylinder of the flotation body, so that the pressure stabilizing plate is in a position separating the foam and the watertight area; The voltage stabilizing plate is provided with a middle through hole, and the raw ore feeding pipe passes through the middle through hole.

2. The cyclone cavitation coupled micro-fine mineral flotation equipment according to claim 1 is characterized in that: The voltage stabilizing plate is provided with a porous structure on its upper ring.

3. The cyclone cavitation coupled micro-fine mineral flotation equipment according to claim 2 is characterized in that: The porous aperture of the voltage stabilizing plate is 1 to 2 mm.

4. The cyclone cavitation coupled micro-fine mineral flotation equipment according to claim 1 is characterized in that: The cavitation bubble generator comprises a high-pressure water pump and a cavitation bubble generating device.

5. The cyclone cavitation coupled micro-fine mineral flotation equipment according to claim 1 is characterized by: A lower water inlet pipe opening is arranged on the lower side wall of the cylindrical cylinder of the flotation body, and is connected to the pipe opening of the cavitation bubble generator along a tangent line, an involute line or a spiral line.

6. The cyclone cavitation coupled micro-fine mineral flotation equipment according to claim 1, characterized in that: An annular concentrate collecting trough is arranged on the top outer wall of the cylindrical cylinder of the flotation body.

7. The cyclone cavitation coupled micro-fine mineral flotation equipment according to claim 6, characterized in that: The annular concentrate collecting trough is provided with a concentrate discharge port.

8. The cyclone cavitation coupled micro-fine mineral flotation equipment according to claim 1, characterized in that: A tailings discharge port is arranged at the bottom of the conical tube of the flotation body.

9. The cyclone cavitation coupled micro-fine mineral flotation equipment according to claim 5, characterized in that: The cylindrical body of the flotation body and the conical body of the flotation body are connected in a cooperative manner; the lower water inlet pipe opening is arranged at the connection position of the cylindrical body of the flotation body and the conical body of the flotation body.

10. The cyclone cavitation coupled micro-fine mineral flotation equipment according to claim 1, characterized in that: The raw ore feeding pipe is fixedly connected to the feeding port at the top of the cylindrical cylinder of the flotation body.

Images