Efficient flotation separation method for low-grade carbonate type fluorite mine

Abstract

The invention discloses an efficient flotation separation method for low-grade carbonate type fluorite ore. The efficient flotation separation method comprises the following steps: S1, crushing; s2, size mixing; S3, dosing; s4, flotation is conducted; s5, dehydrating; the invention further provides efficient flotation separation equipment for the low-grade carbonate fluorite mine, a first driving motor drives a connecting rod to rotate, the connecting rod drives a first stirring plate to conduct efficient stirring operation, the first stirring plate is obliquely arranged, and the bottom of the first stirring plate makes contact with the surface of a semicircular filtering plate; in the stirring process, large shearing force and impact force are generated on slurry, so that the slurry and an agent are mixed more sufficiently and evenly, it is ensured that the agent can act on the surfaces of mineral particles rapidly and effectively, the flotation effect and efficiency are improved, material convection and diffusion in the stirring process are further enhanced through holes in the surface of the first stirring plate, and the flotation effect is improved. The medicament distribution is more uniform, the conditions of medicament agglomeration and over-high or over-low local concentration are reduced, and the medicament utilization rate is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of flotation separation of fluorite ore, and in particular relates to a high-efficiency flotation separation method for low-grade carbonate fluorite ore. Background Art

[0002] The main component of fluorite is calcium fluoride, which is the main raw material for industrial fluorine production.

[0003] A mining flotation machine disclosed in a Chinese patent with publication number CN217940505U includes a flotation box, an electric lead screw, an agitator and a scraper assembly. The flotation box has a flotation chamber, the flotation box has a first side wall and a second side wall arranged relatively to each other along a first preset direction, a discharge port is arranged on at least one of the first side wall and the second side wall, the length of the electric lead screw extends along the first preset direction, one end of the electric lead screw is rotatably connected to the first side wall, and the other end of the electric lead screw is rotatably connected to the second side wall, at least a part of the scraper assembly is arranged in the flotation chamber, the scraper assembly is sleeved on the electric lead screw, and the scraper assembly can reciprocate along the first preset direction so as to move the material to the discharge port through the scraper assembly. The mining flotation machine has a simple structure, a high degree of automation and a high efficiency of scraping bubbles.

[0004] Although the above-mentioned mining flotation machine has the advantages of simple structure, high degree of automation and high scraping efficiency, the mineral powder will accumulate at the bottom of the flotation box during the processing and cannot participate in the normal flotation process, thus causing a waste of resources.

[0005] Therefore, an efficient flotation separation method for low-grade carbonate fluorite ore is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a high-efficiency flotation separation method for low-grade carbonate fluorite ore, so as to solve the technical defect that the traditional equipment will be silted at the bottom of the flotation box during the processing and cannot participate in the normal flotation process, thus causing waste of resources.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A high-efficiency flotation separation method for low-grade carbonate fluorite ore comprises the following steps:

[0009] S1. Crushing: Use jaw crusher for coarse crushing, impact crusher for medium crushing, cone crusher or impact crusher for fine crushing, and then use ball mill for fine grinding to separate fluorite and carbonate minerals into monomers.

[0010] S2, mixing: putting the mineral powder obtained in step S1 into a stirring tank, adding an appropriate amount of water and the mineral powder to mix them into a mineral slurry.

[0011] S3, adding reagents; adding collectors and regulators to the slurry obtained in step S2, wherein the collector uses its chemical adsorption effect with calcium ions on the surface of fluorite to make the surface of fluorite particles hydrophobic, making it easy to attach to bubbles and float up, and the regulator can form a hydrophilic film on the surface of carbonate minerals, enhancing its hydrophilicity and making it remain in the slurry.

[0012] S4, flotation; the slurry obtained in step S3 is sent to a flotation machine for flotation, so that the fluorite particles and bubbles fully collide and adhere to form a foam layer, and the foam layer is scraped off to obtain fluorite concentrate.

[0013] S5, dehydration; the fluorite concentrate obtained in step S3 is concentrated by a concentrator to reduce the moisture content in the concentrate, and then filtered through a filter to further dehydrate to obtain a fluorite concentrate product with a lower moisture content.

[0014] The present invention also provides a high-efficiency flotation separation device for low-grade carbonate fluorite ore, which is used to realize the high-efficiency flotation separation method for the low-grade carbonate fluorite ore, and comprises a flotation machine, which comprises a flotation tank, a semicircular filter plate is fixedly connected to the position near the bottom of the flotation tank, a fan-shaped filter plate is connected to a plane on one side of the semicircular filter plate through a connecting piece, a pushing component for pushing the fan-shaped filter plate downward is arranged on the inner wall of one side of the flotation tank, an aeration component is arranged inside the flotation tank and at the bottom of the semicircular filter plate, a mixing component for mixing slurry with a reagent is arranged inside the flotation tank, a current collecting shell is connected to the bottom of the current collecting shell, a drain valve is connected to the bottom of the current collecting shell, a feed pipe is inserted into the upper part of one side of the flotation tank, a foam discharge port is opened on the upper part of the other side of the flotation tank, a guide component for guiding foam is arranged at the mouth of the foam discharge port, and a control component for controlling the mixing component and the guide component is arranged at the bottom of the flotation tank.

[0015] The mixing assembly includes a first drive motor fixedly mounted on the top of the flotation tube, the output shaft key of the first drive motor is connected with a connecting rod, one end of the connecting rod extends downward to the inside of the flotation tank and passes through the semicircular filter plate, the surface of the connecting rod located on the upper part of the semicircular filter plate is fixedly sleeved with a connecting ring, the outer cylindrical surface of the connecting ring is fixedly connected with a plurality of groups of inclined first stirring plates, the bottom of the first stirring plate contacts the surface of the semicircular filter plate, the surface of the first stirring plate is provided with a plurality of groups of holes, and the bottom end of the connecting rod is connected with a current collecting assembly for scraping materials on the inner wall of the bottom of the flotation tank into the inside of the current collecting shell.

[0016] As a preferred embodiment of the present invention, the current collecting assembly includes several groups of second stirring plates fixedly mounted on the outer circular surface of one end of the bottom of the connecting rod, the bottom of the second stirring plates contacts the bottom inner wall of the flotation tank, the upper and lower ends of the second stirring plates are inclined inward, and a current collecting groove for collecting current is provided at the bottom of the second stirring plates, and the mouth of the current collecting groove is aligned with the mouth of the current collecting shell.

[0017] As a further solution of the present invention, the aeration assembly includes a connecting pipe inserted into the surface of the flotation tank and located below the semicircular filter plate, one end of the connecting pipe extends to the interior of the flotation tank and is connected to a one-to-two pipe, both sides of the one-to-two pipe are respectively connected to branch pipes, the bottoms of the branch pipes are connected to several groups of exhaust pipes, and the other end of the connecting pipe is connected to an air intake valve.

[0018] As a preferred embodiment of the present invention, the guide assembly includes a guide groove connected to the mouth of the foam discharge port, the guide groove is located at one end on the outside and is inclined downward, a drain port is provided on the middle surface of the guide groove, a third filter plate is inlaid at the mouth of the drain port, a water collecting trough is fixedly installed at the bottom of the guide groove and located at the mouth of the drain port, a check valve is connected to the bottom of the water collecting trough, a conduit is connected to the mouth of the check valve, the other end of the conduit is connected to the inner cavity of the collecting shell, and a foam collecting assembly is provided at the mouth of the guide groove for accelerating the speed at which foam enters the guide groove.

[0019] As a preferred embodiment of the present invention, the foam collecting assembly includes a connecting shaft which is rotatably connected to the inner cavity of the foam discharge port and is located above the guide groove. A plurality of scrapers are fixedly connected to the outer cylindrical surface of the connecting shaft. One end of the bottom of the scraper contacts the inner cavity of the guide groove. A second drive motor is fixedly installed on the surface of the flotation tank. The output shaft of the second drive motor passes through the flotation tank and is connected to the connecting shaft.

[0020] As a further solution of the present invention, one side of the collecting shell is connected to a circulation pump, the output end of the circulation pump is connected to a delivery pipe, and the other end of the delivery pipe meanders upward to the bottom of the feed pipe and extends to the inside of the flotation tank.

[0021] As a preferred embodiment of the present invention, the connecting member includes a fixing ring fixedly mounted on both sides of one end of the semicircular filter plate located on the plane, a connecting groove is provided on the surface of the fan-shaped filter plate and at a position corresponding to the fixing ring, the fixing ring is rotatably connected to the inner cavity of the connecting groove, a pin hole is provided on the surface of the fan-shaped filter plate and at a position corresponding to the inner cavity of the fixing ring, and a connecting pin is inserted into the inner cavity of the pin hole.

[0022] As a preferred embodiment of the present invention, the pushing component includes a limiting groove which is opened on the inner wall of one side of the flotation tank and located at a position corresponding to the fan-shaped filter plate, an electric push rod is fixedly inserted at the top of the limiting groove, and the telescopic end of the electric push rod is fixedly connected to a connecting strip, one end of the connecting strip extends toward the surface of the fan-shaped filter plate, a square hole is opened on the surface of the fan-shaped filter plate and at a position corresponding to the connecting strip, a fixing rod is fixedly connected to a side opening of the square hole close to the inner wall of the flotation tank, a long strip hole corresponding to the fixing rod is opened on the surface of the connecting strip, the connecting strip is inserted into the inner cavity of the square hole and the fixing rod is slidably connected to the inner cavity of the long strip hole.

[0023] As a further preferred embodiment of the present invention, the control component includes a controller fixedly installed at the bottom of the flotation tank, and a plurality of groups of liquid level sensors are installed on the inner wall of one side of the flotation tank from bottom to top. The signal output ends of the liquid level sensors are electrically connected to the signal input ends of the controller through wires, the first drive motor, the circulation pump and the second drive motor are all controlled by the controller, and the signal input end of the electric push rod is electrically connected to the signal output end of the controller through wires.

[0024] Compared with the prior art, the high-efficiency flotation separation method of low-grade carbonate fluorite ore provided by the present invention has the following beneficial effects:

[0025] 1. Through the setting of the mixing component, the first driving motor drives the connecting rod to rotate, so that the connecting rod drives the first stirring plate to perform efficient stirring operation. The first stirring plate is inclined and the bottom contacts the surface of the semicircular filter plate. During the stirring process, a large shear force and impact force are generated on the slurry, so that the slurry and the reagent are mixed more fully and evenly, ensuring that the reagent can act on the surface of the mineral particles quickly and effectively, and improving the flotation effect and efficiency. The holes on the surface of the first stirring plate further enhance the convection and diffusion of the materials during the stirring process, making the reagent distribution more uniform, reducing the agglomeration of the reagent and the local concentration being too high or too low, and improving the utilization rate of the reagent, thereby improving the flotation indicators, such as the concentrate grade and recovery rate, while reducing the reagent consumption cost, and the first stirring plate scrapes the material accumulated on the surface of the semicircular filter plate and breaks it up to prevent it from accumulating on the surface of the semicircular filter plate and failing to be fully mixed with the reagent.

[0026] 2. Through the setting of the collecting assembly, as the connecting rod rotates, the bottom of the second stirring plate contacts the inner wall of the bottom of the flotation tank, scrapes the material settled at the bottom and makes it enter the collecting tank, and finally flows into the collecting shell, which is helpful to recover the useful minerals at the bottom, avoid waste caused by material accumulation at the bottom, improve the total recovery rate of mineral resources, and keep the bottom of the flotation tank clean, prevent material accumulation from affecting the normal operation of the aeration assembly and other components, and the inward tilting design of the upper and lower ends of the second stirring plate is conducive to the aggregation and diversion of materials, improves the efficiency of material collection, enables the bottom material to enter the collecting tank more smoothly, and reduces material residue.

[0027] 3. The circulation pump transports the liquid in the collecting shell back to the flotation tank to realize the recycling of the liquid, so that some materials and reagents that are not fully floated can be returned to the flotation tank for re-floatation, thereby improving resource utilization and flotation efficiency, reducing the waste of materials and reagents, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only examples of the embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 is a flow chart of an embodiment of the present invention;

[0030] Figure 2 The structure of the embodiment of the present invention is shown in FIG. Figure 1 ;

[0031] Figure 3 The structure of the embodiment of the present invention is shown in FIG. Figure 2 ;

[0032] Figure 4 It is a schematic cross-sectional structural diagram of a flotation tank in an embodiment of the present invention;

[0033] Figure 5 Schematic diagram of the structure of the second stirring plate in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of an aeration assembly in an embodiment of the present invention;

[0035] Figure 7 It is a structural schematic diagram of the guide groove in an embodiment of the present invention;

[0036] Figure 8 Schematic diagram of the structure of a semicircular filter plate in an embodiment of the present invention.

[0037] Reference numerals:

[0038] 100, flotation tank; 101, foam outlet; 102, feed pipe; 103, semicircular filter plate; 104, fan-shaped filter plate; 105, limit groove; 106, connecting pin; 107, connecting groove; 108, fixing ring; 109, pin hole; 110, fixing rod; 111, square hole; 112, long hole; 113, connecting strip; 114, electric push rod;

[0039] 200, first driving motor; 201, connecting rod; 202, first stirring plate; 203, second stirring plate; 204, collecting groove; 205, hole; 206, connecting ring;

[0040] 300, second driving motor; 301, scraper; 302, connecting shaft;

[0041] 400, guide groove; 401, third filter plate; 402, check valve; 403, water collecting tank; 404, conduit; 405, drain outlet;

[0042] 500, intake valve; 501, connecting pipe; 502, one-to-two pipes; 503, branch pipe; 504, exhaust pipe;

[0043] 600, operation screen; 601, controller; 602, liquid level sensor;

[0044] 700, delivery pipe; 701, circulation pump; 702, collecting shell; 703, drain valve. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0046] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present invention.

[0047] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0048] like Figure 1 As shown, an efficient flotation separation method for low-grade carbonate fluorite ore according to an embodiment of the present invention comprises the following steps:

[0049] S1. Crushing: Use jaw crusher for coarse crushing, impact crusher for medium crushing, cone crusher or impact crusher for fine crushing, and then use ball mill for fine grinding to separate fluorite and carbonate minerals into monomers;

[0050] S2, mixing; the ore powder obtained in step S1 is placed in a stirring tank, and an appropriate amount of water is added to mix with the ore powder to form a slurry

[0051] S3, adding reagents; adding collectors and regulators to the slurry obtained in step S2, the collectors make the surface of fluorite particles hydrophobic by chemical adsorption with calcium ions on the surface of fluorite, and are easy to attach to bubbles and float, and the regulators can form a hydrophilic film on the surface of carbonate minerals, enhance their hydrophilicity, and make them stay in the slurry

[0052] S4, flotation; the slurry obtained in step S3 is fed into a flotation machine for flotation, so that the fluorite particles and bubbles fully collide and adhere to form a foam layer, and the foam layer is scraped off to obtain fluorite concentrate;

[0053] S5, dehydration; the fluorite concentrate obtained in step S3 is concentrated by a concentrator to reduce the moisture content in the concentrate, and then filtered through a filter to further dehydrate to obtain a fluorite concentrate product with a lower moisture content.

[0054] like Figure 2-Figure 8 As shown, an embodiment of the present invention is a high-efficiency flotation separation device for low-grade carbonate fluorite ore, which is used to realize the high-efficiency flotation separation method of the low-grade carbonate fluorite ore, including the above-mentioned flotation machine, the flotation machine including a flotation tank 100, a semicircular filter plate 103 is fixedly connected to the position near the bottom of the flotation tank 100, a side plane of the semicircular filter plate 103 is connected to a fan-shaped filter plate 104 through a connecting piece, a pushing component for pushing the fan-shaped filter plate 104 downward is arranged on the inner wall of one side of the flotation tank 100, and the interior of the flotation tank 100 and the semicircular filter plate 103 are located in the inner wall of the semicircular filter plate 103. An aeration assembly is provided at the bottom of the filter plate 103, a mixing assembly for mixing the slurry and the reagent is provided inside the flotation tank 100, a collecting shell 702 is connected to the bottom of the flotation tank 100, a drain valve 703 is connected to the bottom of the collecting shell 702, a feed pipe 102 is plugged into the upper part of one side of the flotation tank 100, a foam discharge port 101 is provided at the upper part of the other side of the flotation tank 100, a guide assembly for guiding the foam is provided at the mouth of the foam discharge port 101, and a control assembly for controlling the mixing assembly and the guide assembly is provided at the bottom of the flotation tank 100.

[0055] The mixing assembly includes a first drive motor 200 fixedly installed on the top of the flotation tube, the output shaft key of the first drive motor 200 is connected to a connecting rod 201, one end of the connecting rod 201 extends downward to the inside of the flotation tank 100 and passes through the semicircular filter plate 103, the surface of the connecting rod 201 located on the upper part of the semicircular filter plate 103 is fixedly sleeved with a connecting ring 206, the outer cylindrical surface of the connecting ring 206 is fixedly connected to a plurality of groups of inclined first stirring plates 202, the bottom of the first stirring plate 202 contacts the surface of the semicircular filter plate 103, the surface of the first stirring plate 202 is provided with a plurality of groups of holes 205, and the bottom end of the connecting rod 201 is connected to a current collecting assembly for scraping the material on the bottom inner wall of the flotation tank 100 into the inside of the current collecting shell 702. When the first driving motor 200 drives the connecting rod 201 to rotate, the connecting rod 201 drives the first stirring plate 202 to perform efficient stirring operation. The first stirring plate 202 is inclined and the bottom contacts the surface of the semicircular filter plate 103. It can generate greater shear force and impact force on the slurry during the stirring process, so that the slurry and the reagent are mixed more fully and evenly, ensuring that the reagent can act on the surface of the mineral particles quickly and effectively, improving the flotation effect and efficiency. The holes 205 on the surface of the first stirring plate 202 further enhance the convection and diffusion of the materials during the stirring process, making the reagent distribution more even, reducing the agglomeration of the reagent and the local concentration being too high or too low, and improving the utilization rate of the reagent, thereby improving flotation indicators such as concentrate grade and recovery rate, while reducing the reagent consumption cost, and the first stirring plate 202 scrapes the material accumulated on the surface of the semicircular filter plate 103 and breaks it up to prevent it from accumulating on the surface of the semicircular filter plate 103 and failing to be fully mixed with the reagent.

[0056] The current collecting assembly includes a plurality of groups of second stirring plates 203 fixedly mounted on the outer circular surface of one end of the bottom of the connecting rod 201, the bottom of the second stirring plates 203 contacts the bottom inner wall of the flotation tank 100, the upper and lower ends of the second stirring plates 203 are inclined inward, and a current collecting groove 204 for collecting current is provided at the bottom of the second stirring plates 203, and the mouth of the current collecting groove 204 is aligned with the mouth of the current collecting shell 702. By setting the collecting assembly, as the connecting rod 201 rotates, the bottom of the second stirring plate 203 contacts the bottom inner wall of the flotation tank 100, so that the material settled at the bottom can be scraped up and enter the collecting trough 204, and finally flow into the collecting shell 702, which is helpful to recover the useful minerals at the bottom, avoid the waste caused by the accumulation of materials at the bottom, and improve the total recovery rate of mineral resources. At the same time, the bottom of the flotation tank 100 is kept clean, and the accumulation of materials is prevented from affecting the normal operation of the aeration assembly and other components. In addition, the inwardly inclined design of the upper and lower ends of the second stirring plate 203 is conducive to the aggregation and diversion of materials, improves the efficiency of material collection, and enables the bottom materials to enter the collecting trough 204 more smoothly, reducing material residues.

[0057] The aeration assembly includes a connecting pipe 501 inserted into the surface of the flotation tank 100 and located below the semicircular filter plate 103. One end of the connecting pipe 501 extends to the interior of the flotation tank 100 and is connected to a one-to-two pipe 502. Both sides of the one-to-two pipe 502 are respectively connected to branch pipes 503. The bottoms of the branch pipes 503 are connected to several groups of exhaust pipes 504. The other end of the connecting pipe is connected to an air intake valve 500. By setting up the aeration component, the one-to-two tanks evenly distribute the incoming air to the branch pipes 503 on both sides, and then the gas is discharged from several groups of exhaust pipes 504 at the bottom of the branch pipes 503, so that a uniformly distributed bubble group can be formed under the semicircular filter plate 103, which is helpful to make the minerals fully contact with the bubbles, and improve the probability and uniformity of the minerals adhering to the bubbles, thereby improving the flotation separation effect. For a complex mineral system such as low-grade carbonate fluorite ore, it can better achieve the separation of target minerals and gangue minerals, improve the concentrate grade and recovery rate, and at the same time reduce the difference in local flotation effects caused by uneven bubble distribution, thereby ensuring the stability and reliability of the entire flotation process.

[0058] The guide assembly includes a guide groove 400 connected to the mouth of the foam discharge port 101, the outer end of the guide groove 400 is inclined downward, a drain port 405 is provided on the middle surface of the guide groove 400, the mouth of the drain port 405 is inlaid with a third filter plate 401, a water collecting trough 403 is fixedly installed at the bottom of the guide groove 400 and at the mouth of the drain port 405, a check valve 402 is connected to the bottom of the water collecting trough 403, the mouth of the check valve 402 is connected to a conduit 404, the other end of the conduit 404 is connected to the inner cavity of the collecting shell 702, and a foam collecting assembly is provided at the mouth of the guide groove 400 for accelerating the speed at which foam enters the guide groove 400. By setting the guide component, the foam generated by flotation can be discharged smoothly from the flotation tank 100, the residence time of the foam in the tank can be reduced, the minerals can be prevented from being mixed into the slurry again after the foam breaks, the recovery rate and quality of the concentrate can be improved, the flotation separation effect can be ensured, and at the same time, the water in the foam can be filtered and recovered, and the filtered water is introduced into the collecting shell 702 through the conduit 404, so as to realize the recycling of water resources, reduce the use of fresh water, reduce production costs and water consumption, and avoid environmental pollution and waste of resources caused by direct discharge of water in the foam.

[0059] The foam collecting assembly includes a connecting shaft 302 which is rotatably connected to the inner cavity of the foam discharge port 101 and is located above the guide groove 400. A plurality of scrapers 301 are fixedly connected to the outer circumferential surface of the connecting shaft 302. The bottom end of the scraper 301 contacts the inner cavity of the guide groove 400. A second driving motor 300 is fixedly installed on the surface of the flotation tank 100. The output shaft of the second driving motor 300 passes through the flotation tank 100 and is connected to the connecting shaft 302. When the second driving motor 300 drives the connecting shaft 302 to rotate, the scraper 301 continuously scrapes the foam in the guide groove 400, ensuring that the foam can be continuously and stably discharged from the flotation tank 100, improving the efficiency and thoroughness of the foam discharge, reducing the accumulation and clogging risks of the foam in the guide groove 400, further ensuring the smooth progress of the flotation process, and improving the recovery efficiency of the concentrate.

[0060] One side of the collecting shell 702 is connected to a circulation pump 701, and the output end of the circulation pump 701 is connected to a delivery pipe 700. The other end of the delivery pipe 700 meanders upward to the bottom of the feed pipe 102 and extends to the inside of the flotation tank 100. The circulation pump 701 delivers the liquid in the collecting shell 702 back to the flotation tank 100: it can realize the recycling of the liquid, so that some of the materials and reagents that are not fully floated are returned to the flotation tank 100 for re-floatation, thereby improving the utilization rate of resources and the flotation efficiency, reducing the waste of materials and reagents, and reducing the production cost.

[0061] The connecting piece includes a fixing ring 108 fixedly mounted on both sides of one end of the semicircular filter plate 103 located on the plane, a connecting groove 107 is provided on the surface of the fan-shaped filter plate 104 and at a position corresponding to the fixing ring 108, the fixing ring 108 is rotatably connected to the inner cavity of the connecting groove 107, a pin hole 109 is provided on the surface of the fan-shaped filter plate 104 and at a position corresponding to the inner cavity of the fixing ring 108, a connecting pin 106 is inserted into the inner cavity of the pin hole 109, and through the setting of the connecting piece, the fan-shaped filter plate 104 can be stably connected to the semicircular filter plate 103 to ensure the integrity and stability of the filtering structure.

[0062] The pushing assembly includes a limiting groove 105 which is opened on the inner wall of one side of the flotation tank 100 and is located at a position corresponding to the fan-shaped filter plate 104. An electric push rod 114 is fixedly inserted at the top of the limiting groove 105. The telescopic end of the electric push rod 114 is fixedly connected to a connecting strip 113. One end of the connecting strip 113 extends toward the surface of the fan-shaped filter plate 104. A square hole 111 is opened on the surface of the fan-shaped filter plate 104 and at a position corresponding to the connecting strip 113. A fixing rod 110 is fixedly connected to a side opening of the square hole 111 close to the inner wall of the flotation tank 100. A long hole 112 corresponding to the fixing rod 110 is opened on the surface of the connecting strip 113. The connecting strip 113 is inserted into the inner cavity of the square hole 111 and the fixing rod 110 is slidably connected to the inner cavity of the long hole 112. By pushing the setting of the assembly and the telescopic movement of the electric push rod 114, the rotation of the fan-shaped filter plate 104 is precisely controlled to realize the automatic opening and closing function of the filter plate, thereby improving the operating convenience and intelligence of the equipment and reducing the labor intensity and safety risks of manual operation. At the same time, when the filter plate needs to be cleaned, the fan-shaped filter plate 104 can be opened quickly and accurately to facilitate the cleaning work, and can be closed in time after the cleaning is completed to ensure the continuity and stability of the flotation process.

[0063] The control component includes a controller 601 fixedly installed at the bottom of the flotation tank 100. Several groups of liquid level sensors 602 are installed on the inner wall of one side of the flotation tank 100 from bottom to top. The signal output ends of the liquid level sensors 602 are electrically connected to the signal input ends of the controller 601 through wires. The first drive motor 200, the circulating pump 701 and the second drive motor 300 are all controlled by the controller 601. The signal input end of the electric push rod 114 is electrically connected to the signal output end of the controller 601 through a wire. Through the setting of the controller 601, the liquid level sensor 602 monitors the liquid level change in the flotation tank 100 in real time and transmits the signal to the controller 601. The controller 601 accurately controls the operating status of the first drive motor 200, the circulation pump 701, the second drive motor 300 and the electric push rod 114 according to the preset program and process requirements, so as to realize the intelligent management of the flotation process, adjust the working parameters of each component in real time according to the actual situation, such as the stirring speed, aeration intensity, material circulation amount and the cleaning time of the filter plate, etc., to ensure that the whole flotation system is always in the best working state, improve the flotation efficiency and the stability of product quality, reduce the influence of human factors on the flotation process, reduce the production cost and labor intensity, and facilitate remote monitoring and fault diagnosis.

[0064] The model of the controller 601 is TMS320F2812, and the model of the liquid level sensor 602 is SENIXToughSonic-50.

[0065] An operation screen 600 is fixedly mounted on the surface of the flotation tank 100 , so that the staff can check the liquid level information in the flotation tank 100 , the working conditions of the first drive motor 200 , the second drive motor 300 , and the circulation pump 701 .

[0066] The working principle of the embodiment of the present invention;

[0067] The slurry of low-grade carbonate fluorite ore enters the flotation tank 100 through the feed pipe 102 at the upper part of one side of the flotation tank 100. At the same time, the drive motor fixedly installed on the top of the flotation tank 100 is started, and the connecting rod 201 connected to its output shaft key begins to rotate. As the connecting rod 201 rotates, the incoming slurry is stirred and mixed, so that the slurry and the added flotation agent can be more fully mixed.

[0068] After the air inlet valve 500 is opened, external gas enters the bottom of the flotation tank 100 to form a large number of bubbles. The bubbles come into contact with the preliminarily mixed slurry during the rising process. Due to the difference in the surface properties of the minerals, the target minerals will selectively adhere to the bubbles, while gangue minerals such as carbonates are less attached, thereby preliminarily achieving the separation of minerals.

[0069] As the bubbles continue to rise, the foam layer carrying the target mineral gathers at the foam discharge port 101 on the other upper side of the flotation tank 100, and the foam is discharged from the foam discharge port 101. The third filter plate 401 filters part of the water entrained in the foam, and the filtered water flows into the water collection tank 403 below. The check valve 402 and the conduit 404 guide the water into the inner cavity of the collecting shell 702, so as to realize water recycling, reduce the water content in the foam, and improve the concentration and quality of the foam.

[0070] At the same time, the second driving motor 300 in the foam collecting assembly starts to drive the connecting shaft 302 to rotate. The scraper 301 fixed on the outer cylindrical surface of the connecting shaft 302 will rotate to continuously scrape the foam in the guide groove 400 so that it can be discharged smoothly, further improving the efficiency and stability of foam discharge.

[0071] As the connecting rod 201 rotates, the material at the bottom of the flotation tank 100 is scraped into the collecting groove 204 opened at the bottom thereof, and the material smoothly enters the collecting shell 702. Part of the liquid in the collecting shell 702 is conveyed upward through the conveying pipe 700 to the bottom of the feed pipe 102, and then extends to the inside of the flotation tank 100, so as to realize the recycling of the liquid in the entire flotation system, which helps to improve the flotation effect and the utilization rate of the material, while reducing the waste of resources and reducing the production cost.

[0072] A plurality of groups of liquid level sensors 602 installed from bottom to top on the inner wall of one side of the flotation tank 100 monitor the liquid level in the tank in real time, and transmit the signal to the signal input end of the controller 601 through a wire electrical connection. The controller 601 accurately controls the operation of the first drive motor 200, the circulation pump 701, the second drive motor 300, the electric push rod 114 and other components according to the liquid level signal and the preset control program, thereby ensuring that the various components of the flotation tank 100 can work together in an orderly manner, realizing the automated operation of the entire flotation operation, improving production efficiency and flotation effect, reducing the difficulty and error of manual operation, and ensuring the efficient flotation separation of low-grade carbonate fluorite ore.

[0073] When flotation is completed, the drain valve 703 is opened, and the electric push rod 114 is controlled to extend, and the fan-shaped filter plate 104 rotates around the fixed ring 108 to open the filter plate. At the same time, the connecting rod 201 drives the first stirring plate 202 and the second stirring plate 203 to rotate. The first stirring plate 202 scrapes the material attached to the surface of the semicircular filter plate 103 through the opened mouth of the fan-shaped filter plate 104, and the material falls on the bottom inner wall of the flotation tank 100. At the same time, the second filter plate scrapes the material accumulated on the bottom of the tank into the collecting groove 204 opened at the bottom, and the material smoothly enters the collecting shell 702 and is discharged from the drain valve 703.

[0074] In summary, in the embodiment of the present invention, the first driving motor 200 drives the connecting rod 201 to rotate, so that the connecting rod 201 drives the first stirring plate 202 to perform efficient stirring operation. The first stirring plate 202 is inclined and the bottom contacts the surface of the semicircular filter plate 103, which can generate greater shear force and impact force on the slurry during the stirring process, so that the slurry and the reagent are mixed more fully and evenly, ensuring that the reagent can act on the surface of the mineral particles quickly and effectively, and improving the flotation effect and efficiency. The holes 205 on the surface of the first stirring plate 202 further enhance the convection and diffusion of the materials during the stirring process, making the reagent distribution more uniform, reducing the agglomeration of the reagent and the local concentration being too high or too low, and improving the utilization rate of the reagent, thereby improving the flotation indicators, such as the concentrate grade and recovery rate, while reducing the reagent consumption cost, and the first stirring plate 202 scrapes the material accumulated on the surface of the semicircular filter plate 103 and breaks it up to prevent it from accumulating on the surface of the semicircular filter plate 103 and failing to be fully mixed with the reagent.

[0075] The above shows and describes the basic principles of the present invention. The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only intended to illustrate the principles of the present invention. Without departing from the scope of the present invention, any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. An efficient flotation separation method for low-grade carbonate fluorite ore, characterized in that: The method comprises the following steps: S1. Crushing: Use jaw crusher for coarse crushing, impact crusher for medium crushing, cone crusher or impact crusher for fine crushing, and then use ball mill for fine grinding to achieve monomer dissociation of fluorite and carbonate minerals; S2, mixing; putting the mineral powder obtained in step S1 into a stirring tank, adding an appropriate amount of water and the mineral powder to mix them into a slurry; S3, adding reagents; adding collectors and regulators to the slurry obtained in step S2, the collectors chemically adsorb calcium ions on the surface of fluorite, the surface of fluorite particles is hydrophobic, attached to bubbles and floats, and the regulator forms a hydrophilic film on the surface of carbonate minerals; S4, flotation; the slurry obtained in step S3 is fed into a flotation machine for flotation, the fluorite particles fully collide and adhere with the bubbles to form a foam layer, and the foam layer is scraped off to obtain fluorite concentrate; S5, dehydration; the fluorite concentrate obtained in step S3 is concentrated by a concentrator to reduce the moisture content in the concentrate, and the concentrate is filtered through a filter to further dehydrate to obtain a fluorite concentrate product with low water content.

2. The high-efficiency flotation separation method of low-grade carbonate fluorite ore according to claim 1, characterized in that: The flotation machine comprises a flotation tank (100), a semicircular filter plate (103) is fixedly connected to a position near the bottom of the flotation tank (100), a side plane of the semicircular filter plate (103) is connected to a fan-shaped filter plate (104) via a connecting piece, a pushing component for pushing the fan-shaped filter plate (104) downward is arranged on an inner wall of one side of the flotation tank (100), an aeration component is arranged inside the flotation tank (100) and at the bottom of the semicircular filter plate (103), and a device for mixing slurry with the flotation tank (100) is arranged inside the flotation tank (100). A mixing component for mixing medicines, wherein the bottom of the flotation tank (100) is connected to a current collecting shell (702), the bottom of the current collecting shell (702) is connected to a drain valve (703), a feed pipe (102) is inserted into the upper part of one side of the flotation tank (100), a foam discharge port (101) is provided at the upper part of the other side of the flotation tank (100), a guide component for guiding foam is provided at the mouth of the foam discharge port (101), and a control component for controlling the mixing component and the guide component is provided at the bottom of the flotation tank (100); The mixing assembly comprises a first driving motor (200) fixedly mounted on the top of the flotation tube, the output shaft of the first driving motor (200) being key-connected with a connecting rod (201), one end of the connecting rod (201) extending downward into the interior of the flotation tank (100) and passing through the semicircular filter plate (103), a connecting ring (206) being fixedly sleeved on the surface of the connecting rod (201) located on the upper part of the semicircular filter plate (103), a plurality of groups of first stirring plates (202) being fixedly connected to the outer circumferential surface of the connecting ring (206) being inclinedly arranged, the bottom of the first stirring plate (202) being in contact with the surface of the semicircular filter plate (103), the surface of the first stirring plate (202) being provided with a plurality of groups of holes (205), and one end of the bottom of the connecting rod (201) being connected to a current collecting assembly for scraping materials on the inner wall of the bottom of the flotation tank (100) into the interior of the current collecting shell (702).

3. The high-efficiency flotation separation method of a low-grade carbonate fluorite ore according to claim 2, characterized in that: The current collecting assembly comprises a plurality of groups of second stirring plates (203) fixedly mounted on the outer circular surface of one end of the bottom of the connecting rod (201); the bottom of the second stirring plates (203) contacts the bottom inner wall of the flotation tank (100); the upper and lower ends of the second stirring plates (203) are inclined inward; a current collecting groove (204) for collecting current is provided at the bottom of the second stirring plates (203); the mouth of the current collecting groove (204) is aligned with the mouth of the current collecting shell (702).

4. The high-efficiency flotation separation method of a low-grade carbonate fluorite ore according to claim 2, characterized in that: The aeration assembly comprises a connecting pipe (501) plugged into the surface of the flotation tank (100) and located below the semicircular filter plate (103); one end of the connecting pipe (501) extends into the interior of the flotation tank (100) and is connected to a one-to-two pipe (502); both sides of the one-to-two pipe (502) are respectively connected to branch pipes (503); the bottoms of the branch pipes (503) are connected to a plurality of exhaust pipes (504); and the other end of the connecting pipe is connected to an air intake valve (500).

5. The high-efficiency flotation separation method of a low-grade carbonate fluorite ore according to claim 2, characterized in that: The guide assembly comprises a guide groove (400) connected to the mouth of the foam discharge port (101); one end of the guide groove (400) located at the outside is inclined downward; a drainage port (405) is provided on the middle surface of the guide groove (400); a third filter plate (401) is inlaid at the mouth of the drainage port (405); a water collecting trough (403) is fixedly installed at the bottom of the guide groove (400) and at the mouth of the drainage port (405); a check valve (402) is connected to the bottom of the water collecting trough (403); the mouth of the check valve (402) is connected to a conduit (404); the other end of the conduit (404) is connected to the inner cavity of a current collecting housing (702); and a foam collecting assembly for accelerating the speed at which foam enters the guide groove (400) is provided at the mouth of the guide groove (400).

6. The high-efficiency flotation separation method of a low-grade carbonate fluorite ore according to claim 5, characterized in that: The foam collecting assembly comprises a connecting shaft (302) rotatably connected to the inner cavity of the foam discharge port (101) and located above the guide groove (400); a plurality of groups of scrapers (301) are fixedly connected to the outer circumferential surface of the connecting shaft (302); a bottom end of the scraper (301) contacts the inner cavity of the guide groove (400); a second drive motor (300) is fixedly mounted on the surface of the flotation tank (100); an output shaft of the second drive motor (300) passes through the flotation tank (100) and is connected to the connecting shaft (302).

7. The high-efficiency flotation separation method of a low-grade carbonate fluorite ore according to claim 2, characterized in that: One side of the collecting housing (702) is connected to a circulation pump (701), the output end of the circulation pump (701) is connected to a delivery pipe (700), and the other end of the delivery pipe (700) meanders upward to the bottom of the feed pipe (102) and extends to the inside of the flotation tank (100).

8. The high-efficiency flotation separation method of low-grade carbonate fluorite ore according to claim 2, characterized in that: The connecting member comprises a fixing ring (108) fixedly mounted on both sides of one end of the semicircular filter plate (103) located on a plane, a connecting groove (107) is provided on the surface of the fan-shaped filter plate (104) and at a position corresponding to the fixing ring (108), the fixing ring (108) is rotatably connected to the inner cavity of the connecting groove (107), a pin hole (109) is provided on the surface of the fan-shaped filter plate (104) and at a position corresponding to the inner cavity of the fixing ring (108), and a connecting pin (106) is inserted into the inner cavity of the pin hole (109).

9. The high-efficiency flotation separation method of low-grade carbonate fluorite ore according to claim 8, characterized in that: The pushing assembly comprises a limiting groove (105) which is formed on the inner wall of one side of the flotation tank (100) and is located at a position corresponding to the fan-shaped filter plate (104); an electric push rod (114) is fixedly inserted at the top of the limiting groove (105); a connecting strip (113) is fixedly connected to the telescopic end of the electric push rod (114); one end of the connecting strip (113) extends toward the surface of the fan-shaped filter plate (104); a square hole (111) is formed on the surface of the fan-shaped filter plate (104) and at a position corresponding to the connecting strip (113); a fixing rod (110) is fixedly connected to a side opening of the square hole (111) close to the inner wall of the flotation tank (100); a long hole (112) corresponding to the fixing rod (110) is formed on the surface of the connecting strip (113); the connecting strip (113) is inserted into the inner cavity of the square hole (111) and the fixing rod (110) is slidably connected to the inner cavity of the long hole (112).

10. A high-efficiency flotation separation method for low-grade carbonate fluorite ore according to any one of claims 2 to 9, characterized in that: The control assembly comprises a controller (601) fixedly mounted on the bottom of a flotation tank (100); a plurality of groups of liquid level sensors (602) are mounted on an inner wall of one side of the flotation tank (100) from bottom to top; signal output ends of the liquid level sensors (602) are electrically connected to signal input ends of the controller (601) via wires; the first drive motor (200), the circulation pump (701) and the second drive motor (300) are all controlled by the controller (601); and the signal input end of the electric push rod (114) is electrically connected to the signal output end of the controller (601) via wires.

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