A beneficiation equipment and method for recovering copper, sulfur and phosphorus from fine particle grade tailings

Abstract

The present application relates to tailings recovery technical field, the present application provides a kind of fine particle grade tailings recovery copper sulphur phosphorus mineral processing equipment and method, in which a kind of fine particle grade tailings recovery copper sulphur phosphorus mineral processing equipment, including pool body, pool body is used to hold and settle tailings water;Shaft body is vertically and rotationally arranged in pool body;Rake frame is slidably arranged on the outer periphery of shaft body by sliding member, rake frame can rotate with shaft body circumferentially, rake frame is rotationally connected with sliding member, rake frame can move along the axial direction of shaft body with sliding member, and can be vertically oscillated to be gathered in the outer periphery of shaft body;Scraping member is arranged in the lower part of rake frame, and scraping member can scrape the tailings settled in the bottom of pool body when following rake frame rotates.By the above technical scheme, the technical problem that the shaft body acting force is large and is prone to breakage in the equipment starting moment in the related art is solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of tailings recovery technology, specifically to a mineral processing equipment and method for recovering copper, sulfur and phosphorus from fine-grained tailings. Background Technology

[0002] In the process of mining resource development, with the continuous mining of high-quality, high-grade ores, resource reserves are gradually decreasing, and the secondary utilization of tailings has become a focus of industry attention. In particular, fine-grained tailings contain elements such as copper, sulfur, and phosphorus, which have considerable economic value. If they can be effectively recovered, it will greatly improve resource utilization and alleviate the pressure of resource shortage.

[0003] Current beneficiation equipment and processes for recovering copper, sulfur, and phosphorus from fine-grained tailings have many shortcomings. During the tailings settling stage, the significant initial resistance during equipment startup can easily damage rotating components (shafts), not only shortening the equipment's lifespan but also significantly increasing energy consumption and maintenance costs. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide a beneficiation equipment and method for recovering copper, sulfur and phosphorus from fine-grained tailings, which solves the technical problem in related technologies where the large force on the shaft during equipment startup leads to easy breakage and damage.

[0005] According to one aspect, at least one embodiment of the present invention provides a mineral processing device for recovering copper, sulfur, and phosphorus from fine-grained tailings, comprising:

[0006] The pool is used to hold and settle tailings water;

[0007] A shaft is vertically and rotatably mounted inside the pool.

[0008] The rake frame is slidably mounted on the outer periphery of the shaft via a sliding member. The rake frame can rotate circumferentially with the shaft. The rake frame is rotatably connected to the sliding member. The rake frame can move axially along the shaft with the sliding member and can swing vertically to retract to the outer periphery of the shaft.

[0009] A scraper is disposed at the lower part of the rake frame, and the scraper is capable of scraping the tailings that have settled at the bottom of the pool as it rotates with the rake frame.

[0010] For example, at least one embodiment of this disclosure provides a mineral processing device for recovering copper, sulfur, and phosphorus from fine-grained tailings.

[0011] The scraper is oscillatingly positioned below the rake frame. The scraper has a scraping state and a drag-reducing state. When in the scraping state, the scraper can contact the bottom wall of the pool to scrape the tailings at the bottom of the pool. When in the drag-reducing state, the scraper can reduce the resistance when it rotates with the rake frame.

[0012] For example, at least one embodiment of this disclosure provides a mineral processing device for recovering copper, sulfur, and phosphorus from fine-grained tailings.

[0013] The scraper has a scraping surface, which is configured to be perpendicular or inclined to the rotation direction of the rake frame when the scraper is in the scraping state, and parallel to the rotation direction of the rake frame when the scraper is in the drag-reducing state.

[0014] For example, at least one embodiment of this disclosure provides a mineral processing device for recovering copper, sulfur, and phosphorus from fine-grained tailings.

[0015] The scraper can swing with the rake frame. The scraper is configured to be in a drag-reducing state after the end of the rake frame swings close to the shaft, and to be in a scraping state after the end of the rake frame swings away from the shaft.

[0016] For example, at least one embodiment of this disclosure provides a mineral processing device for recovering copper, sulfur, and phosphorus from fine-grained tailings, wherein the rake frame includes:

[0017] The first rod, the second rod, the third rod, and the fourth rod are hinged together at their ends, forming a parallel four-bar linkage structure. The first rod is mounted on the sliding member, and the scraper is mounted on the second rod.

[0018] For example, at least one embodiment of this disclosure provides a mineral processing device for recovering copper, sulfur, and phosphorus from fine-grained tailings, wherein the scraper comprises:

[0019] The swing shaft is rotatably mounted on the second rod;

[0020] A scraper is disposed on the swing shaft, the scraper is located below the second rod, the scraper can swing with the swing shaft, and the scraping surface is located on the scraper.

[0021] For example, at least one embodiment of this disclosure provides a mineral processing device for recovering copper, sulfur, and phosphorus from fine-grained tailings, wherein the scraper further includes:

[0022] A sliding rod is slidably mounted on the second rod, and one side of the sliding rod has a rack;

[0023] The swing shaft meshes with the rack via a gear, and the sliding rod can drive the swing shaft to rotate after sliding. The sliding rod has a drive groove on the side facing the fourth rod.

[0024] A telescopic drive rod is provided at one end on the fourth rod and at the other end in the drive groove. The telescopic drive rod is perpendicular to the fourth rod. When the rake frame swings, the telescopic drive rod can extend or retract and slide along the drive groove to drive the sliding rod to move.

[0025] For example, at least one embodiment of this disclosure provides a mineral processing device for recovering copper, sulfur, and phosphorus from fine-grained tailings.

[0026] The drive groove has a limiting member, which is used to limit the sliding range of the telescopic drive rod within the drive groove.

[0027] For example, at least one embodiment of this disclosure provides a mineral processing device for recovering copper, sulfur, and phosphorus from fine-grained tailings.

[0028] An overflow trough is provided on the outer wall of the pool body, which is used to collect clean water overflowing from the top of the pool body;

[0029] The top of the pool wall of the pool body has a vertically opened strip-shaped overflow opening, and an opening adjustment baffle is installed on the strip-shaped overflow opening. The opening adjustment baffle can adjust the height of the lowest point of the strip-shaped overflow opening after being raised and lowered.

[0030] According to another aspect, at least one embodiment of the present invention also provides a beneficiation method for recovering copper, sulfur, and phosphorus from fine-grained tailings, comprising the following steps:

[0031] A1: Add tailings water to the pool and let it stand;

[0032] A2: Swing the rake frame so that its end is close to the shaft, and then drive the shaft to rotate;

[0033] A3: Swing the rake frame and gradually move its end away from the shaft. After the rake frame swings and the scraper moves close to the bottom of the pool, the scraper scrapes the tailings that have settled at the bottom of the pool.

[0034] The beneficial effects of the embodiments of the present invention are as follows:

[0035] In this invention, the pool is used to hold and settle tailings water. The rotation of the shaft drives the rake frame and the scraper on the rake frame to rotate together in the pool. The scraper scrapes off the tailings settled at the bottom of the pool and discharges them from the outlet in the middle of the bottom of the pool, thereby completing the function of collecting the settled tailings.

[0036] The rake frame can slide axially along the shaft via a sliding component, moving closer to or further away from the bottom of the pool. This allows adjustment of the pressure and distance of the scraper on the bottom of the pool. The rake frame can also swing vertically, resulting in two states: a low-resistance state close to the shaft and a working state far from the shaft (where the scraper is close to the bottom of the pool). Before starting the mineral processing equipment, the rake frame is first swung to the low-resistance state, where both the rake frame and scraper are closer to the shaft. This reduces the force required for shaft rotation, decreasing the force needed for shaft startup, extending shaft lifespan, and reducing the power required for the drive unit. After the shaft starts rotating, the rake frame, carrying the scraper, gradually swings to the working state. This gradually increases the force on the shaft, until finally (at the working state position) the force is sliding friction, which is less than the maximum static friction force required for direct startup from the working state position. This improves the overall lifespan of the equipment and reduces maintenance cycles and costs. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0038] Figure 1 This is a three-dimensional structural schematic diagram of a mineral processing equipment for recovering copper, sulfur and phosphorus from fine-grained tailings in one embodiment of the present invention.

[0039] Figure 2 for Figure 1 A top view of the structure in the embodiment;

[0040] Figure 3 for Figure 2 Schematic diagram of the AA section structure;

[0041] Figure 4 for Figure 3 A schematic diagram of the three-dimensional structure;

[0042] Figure 5 for Figure 4 A magnified schematic diagram of part of the B section;

[0043] Figure 6 for Figure 3 A schematic diagram of the structure when the end of the rake frame is close to the shaft;

[0044] Figure 7 for Figure 6 A schematic diagram of the three-dimensional structure;

[0045] Figure 8 for Figure 7A magnified schematic diagram of the C-shaped structure.

[0046] Figure 9 This is a schematic diagram of the sliding rod structure;

[0047] Figure 10 This is a schematic flowchart of a mineral processing method for recovering copper, sulfur, and phosphorus from fine-grained tailings in another embodiment of the present invention.

[0048] In the diagram: 1-pool body, 11-strip overflow opening, 12-opening adjustment baffle, 13-inlet, 14-outlet, 2-shaft body, 3-rake frame, 31-sliding component, 32-first rod, 33-second rod, 34-third rod, 35-fourth rod, 4-scraper, 41-scraping surface, 42-swing shaft, 43-scraper, 44-sliding rod, 45-rack, 46-gear, 47-drive groove, 48-telescopic drive rod, 49-limiting component, 5-overflow groove. Detailed Implementation

[0049] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0050] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0051] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0054] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0055] like Figures 1-9 As shown, this is a mineral processing device for recovering copper, sulfur and phosphorus from fine-grained tailings according to an embodiment of the present invention. It includes a pool body 1 for holding and settling tailings water; a shaft body 2 vertically and rotatably disposed within the pool body 1; a rake frame 3 slidably disposed on the outer periphery of the shaft body 2 via a sliding member 31, the rake frame 3 being able to rotate circumferentially with the shaft body 2, the rake frame 3 being rotatably connected to the sliding member 31, the rake frame 3 being able to move axially along the shaft body 2 with the sliding member 31, and being able to swing vertically to retract to the outer periphery of the shaft body 2; a scraper 4 disposed at the lower part of the rake frame 3, the scraper 4 being able to scrape the tailings settled at the bottom of the pool body 1 when rotating with the rake frame 3.

[0056] Reference Figure 3 and Figure 6 As shown, the pool 1 is used to hold and settle (with the addition of a flocculant) tailings water. The tailings water is poured into the pool 1 through the inlet 13, and the outlet 14 is used to discharge the settled tailings. The rotation of the shaft 2 drives the rake frame 3 and the scraper 4 on the rake frame 3 to rotate together in the pool 1. The scraper 4 scrapes off the tailings settled at the bottom of the pool 1 and discharges them from the outlet in the middle of the bottom of the pool, thus completing the function of collecting the settled tailings.

[0057] The rake frame 3 can slide axially along the shaft 2 via the sliding member 31. After sliding, it can move closer to or further away from the bottom of the pool 1, thereby adjusting the pressure and distance of the scraper 4 on the bottom of the pool 1. The rake frame 3 can also swing vertically, and after swinging, it has two states: a low-resistance state close to the shaft 2 and a working state far away from the shaft 2 (at which time the scraper 4 is close to the bottom of the pool 1). Before starting the mineral processing equipment, the rake frame 3 is first swung to the low-resistance state. At this time, the rake frame 3 and the scraper 4 are closer to the shaft 2, and the force required for the shaft 2 to rotate is smaller, which will reduce the force required for the shaft 2 at the moment of start-up, thereby improving the service life of the shaft 2 and reducing the power required by the drive device. After the shaft 2 starts to rotate, the rake frame 3, along with the scraper 4, gradually swings to the working state. In this way, the force on the shaft 2 gradually increases, and finally (at the working state position) is the sliding friction force, which is also less than the maximum static friction force when directly starting from the working state position, thus improving the overall service life of the equipment and reducing the maintenance cycle and cost.

[0058] In some examples, the scraper 4 is oscillating on the rake frame 3. The scraper 4 is configured to be in a scraping state and a drag-reducing state after oscillating. When in the scraping state, the scraper 4 can scrape the tailings at the bottom of the pool body 1, and when in the drag-reducing state, it can reduce the resistance of the scraper 4 as it rotates with the rake frame 3.

[0059] For example, such as Figure 3 As shown, scraper 4 is in the scraping state at this time, as... Figure 6 As shown, at this time, the scraper 4 is in the resistance reduction state. Before the shaft 2 rotates, the scraper 4 is in the resistance reduction state to reduce resistance. After the shaft 2 starts, the scraper 4 is in the scraping state to perform scraping work.

[0060] In some examples, the scraper 4 has a scraping surface 41, which is configured to be perpendicular or inclined to its rotation direction when the scraper 4 is in the scraping state, and parallel to its rotation direction when the scraper 4 is in the drag-reducing state.

[0061] For example, such as Figure 3 and Figure 6 As shown, when the scraper 4 is in the scraping state, the scraping surface 41 faces the fluid (i.e., the scraping surface 41 is perpendicular to the rotation direction or at a certain angle). When the scraper 4 is in the drag-reducing state, the side of the scraping surface 41 faces the fluid (i.e., the scraping surface 41 is parallel to the rotation direction). The contact area is small, so the resistance is small, which meets the need to reduce resistance when the shaft 2 rotates.

[0062] In some examples, the scraper 4 can swing along with the swing of the rake frame 3. The scraper 4 is configured to be in a drag-reducing state after swinging close to the shaft 2 at the end of the rake frame 3 (i.e., the end of the rake frame 3 away from the shaft 2), and to be in a scraping state after swinging away from the shaft 2 at the end of the rake frame 3.

[0063] For example, such as Figures 3-8As shown, when the rake frame 3 swings to the low resistance state, the scraper 4 is also in the low resistance state. When the rake frame 3 swings to the working state, the scraper 4 is in the scraping state. The state of the scraper 4 follows the swing of the rake frame 3, so that the two cooperate with each other and simultaneously reach the working state or the low resistance state, which improves consistency. This can be achieved simply by controlling the swing of the rake frame 3.

[0064] In some examples, the rake frame 3 includes a first rod 32, a second rod 33, a third rod 34, and a fourth rod 35, with a sliding member 31 vertically sliding on the shaft 2; the first rod 32, the second rod 33, the third rod 34, and the fourth rod 35 are hinged end to end, forming a parallel four-bar linkage structure, with the first rod 32 mounted on the sliding member 31 and the scraper 4 mounted on the second rod 33.

[0065] For example, such as Figure 3 and Figure 6 As shown, the sliding member 31 can slide along the axial direction of the shaft 2 (it cannot rotate, and it can stop at the required position after sliding; the sliding member 31 can be limited by setting a tightening screw on the sliding member 31). The sliding member 31 is provided with a rake frame 3 (i.e., a parallel four-bar structure formed by the first rod 32, the second rod 33, the third rod 34, and the fourth rod 35). Two rake frames 3 are symmetrically arranged on the sliding member 31. After the rake frame 3 swings, it can move closer to or away from the shaft 2, thereby adjusting the state of the rake frame 3 according to the rotation needs of the shaft 2 (i.e., it is in a low resistance state before starting and in a working state after starting). The swing of the rake frame 3 can be achieved by setting a pull member between the fourth rod 35 and the shaft 2. The pull member can be a telescopic rope, a cylinder, or a hydraulic cylinder, etc.

[0066] The sliding of the sliding member 31 can adjust the distance between the first rod 32 and the bottom of the pool body 1 when they are parallel, adjust the force of the scraper 4 on the bottom of the pool body 1, or when the scraper 4 is worn, the sliding member 31 can be lowered so that the scraper 4 can continue to perform the scraping function until it can no longer be used, thus improving its service life.

[0067] In some examples, the scraper 4 includes a swing shaft 42 and a scraper 43. The swing shaft 42 is rotatably mounted on the second rod 33. The scraper 43 is mounted on the swing shaft 42 and can swing with the swing shaft 42. The scraping surface 41 is located on the scraper 43.

[0068] In some examples, the scraper 4 also includes a sliding rod 44, which is slidably mounted on the second rod 33. One side of the sliding rod 44 has a rack 45. The swing shaft 42 meshes with the rack 45 through a gear 46. The sliding rod 44 can drive the swing shaft 42 to swing after sliding. The sliding rod 44 has a drive groove 47 on the side facing the fourth rod 35. One end of the telescopic drive rod 48 is mounted on the fourth rod 35, and the other end slides in the drive groove 47. The telescopic drive rod 48 is perpendicular to the fourth rod 35. When the rake frame 3 swings, the telescopic drive rod 48 can extend or retract and slide along the drive groove 47 to drive the sliding rod 44 to move.

[0069] For example, such as Figure 8 As shown, after the sliding rod 44 slides back and forth, it can drive the swing shaft 42 to rotate back and forth with the help of the gear 46. The rotation of the swing shaft 42 can drive the scraper 43 on it to swing. The telescopic drive rod 48 can move along the direction of the sliding rod 44 after the rake frame 3 swings. One end of the telescopic drive rod 48 is in the drive groove 47. When the telescopic drive rod 48 slides to the side wall of the drive groove 47, it drives the sliding rod 44 to slide.

[0070] In some examples, the drive groove 47 has a limiting member 49 for limiting the sliding range of the telescopic drive rod 48 within the drive groove 47.

[0071] For example, such as Figure 8 and Figure 9 As shown, there are two limiting members 49, both of which are slidably disposed in the drive groove 47 (the position of the limiting members 49 can be fixed by screws). The area between the two limiting members 49 is the active area of ​​the telescopic drive rod 48. When the telescopic drive rod 48 moves to one side, it can act on one of the limiting members 49 and drive the sliding rod 44 to slide to one side. When the telescopic drive rod 48 moves to the other side, it can act on the other limiting member 49 and drive the sliding rod 44 to slide to the other side.

[0072] In some examples, an overflow trough 5 is provided on the outer wall of the pool body 1, which is used to collect the clean water overflowing from the top of the pool body 1; the top of the pool wall of the pool body 1 has a vertically opened strip overflow opening 11, and an opening adjustment baffle 12 is provided on the strip overflow opening 11 for lifting and lowering, which can adjust the height of the lowest point of the strip overflow opening 11 after lifting and lowering.

[0073] For example, such as Figure 1 As shown, by adjusting the baffle 12 of the opening, the liquid level of the overflowing clean water in the pool 1 can be adjusted, and the clean water above a certain liquid level can be controlled to flow out.

[0074] like Figure 10 As shown, this illustrates a beneficiation method for recovering copper, sulfur, and phosphorus from fine-grained tailings according to another embodiment of the present invention, comprising the following steps:

[0075] A1: Add tailings water to pool 1 and let it stand;

[0076] A2: After the swing rake frame 3 brings its end close to the shaft 2, it drives the shaft 2 to rotate;

[0077] A3: Swing the rake frame 3 and gradually move its end away from the shaft 2. After the rake frame 3 swings and the scraper 4 approaches the bottom of the pool body 1, the scraper 4 scrapes the tailings that have settled at the bottom of the pool body 1.

[0078] Furthermore, the recovery and treatment of the tailings water (i.e., the overflow product from iron ore tailings concentrated and classified by hydrocyclones) in step A1 also includes the following steps:

[0079] S1: Feed tailings water (concentration 5-7.5%, -38 micron particle size greater than 95%) into pool 1;

[0080] S2: Add polyacrylamide to the tailings water at a concentration of 0.05% and a dosage of 25g / t. Mix the polyacrylamide thoroughly with the slurry.

[0081] S3: Polyacrylamide is thoroughly mixed with slurry (tailings water) and flocculated and settled in tank 1 for 2.5 to 3 hours;

[0082] S4: 30% to 35% of the underflow from the thickener (i.e., tank 1) is used as raw material for the flotation of copper-sulfur minerals;

[0083] S5: The overflow of the thickener (i.e., tank 1) is less than 0.03%, and it is used as circulating water in the mineral processing process.

[0084] Furthermore, the following steps are included:

[0085] S6: Feed the thickener underflow from S4 into the mixing tank, add the mixed copper-sulfur collector and No. 2 oil to the mixing tank. The mixed copper-sulfur collector is butyl xanthate and butyl ammonium black powder in a mass ratio of 2:1 and a dosage of 50g / t. The dosage of No. 2 oil is 30g / t. The stirring time is 3 to 5 minutes.

[0086] S7: The slurry (tailings water) after stirring S6 is fed into the copper-sulfur flotation roughing process to obtain copper-sulfur rough concentrate and tailings;

[0087] S8: The copper-sulfur rough concentrate from S7 is fed into a closed-circuit grinding process consisting of a tower mill and a hydrocyclone. The overflow from the hydrocyclone is the grinding product, with a -38 micron content of 85-90%.

[0088] S9: The grinding product of S8 is fed into the mixing tank of the copper-sulfur beneficiation process. Water glass is added to the mixing tank at a dosage of 200g / t. After stirring, the slurry undergoes secondary beneficiation and primary scavenging of copper-sulfur mixed flotation to obtain copper-sulfur mixed flotation concentrate 2 and scavenging tailings.

[0089] S10: Add butyl xanthate and No. 2 oil to the scavenging tailings of S9. The dosage of butyl xanthate is 50g / t and the dosage of No. 2 oil is 30g / t. The scavenging tailings with added butyl xanthate and No. 2 oil are fed into the sulfur flotation process for secondary roughing and primary cleaning to obtain sulfur concentrate, sulfur tailings, and the final product of sulfur concentrate.

[0090] S11: Feed the copper-sulfur mixed flotation agent 2 from S9 into the mixing tank of the copper-sulfur separation process. Add lime, sulfur-iron inhibitor, and copper collector to the mixing tank. The amount of lime is 1000g / t, the pH value is 9-10, the amount of sulfur-iron inhibitor is 1500g / t, and the amount of copper collector is 20g / t.

[0091] S12: The slurry prepared by the copper-sulfur separation mixing tank in S11 is fed into the copper-sulfur separation process for three fine selections to obtain copper concentrate 3 and copper middlings. Copper concentrate 3 is the final copper concentrate product.

[0092] S13: Return the copper middlings from S12 to a refining process in S9.

[0093] Furthermore, it also includes the following steps:

[0094] S14: Feed the tailings from S7 into the phosphorus beneficiation mixing tank. Add phosphorus beneficiation mixed collector, soda ash, and water glass to the mixing tank. The dosage of mixed collector is 400g / t, the dosage of soda ash is 300g / t, and the dosage of water glass is 400g / t. The stirring time is 3 to 5 minutes.

[0095] S15: After stirring S14, the slurry is fed into the phosphorus flotation process for one roughing, one scavenging, and three cleaning processes to obtain phosphorus concentrate 3 and phosphorus tailings. Phosphorus concentrate 3 is the final product.

[0096] S16: The phosphorus tailings from S15 are combined with the sulfur tailings from S10 to form the final tailings.

[0097] A method for flocculation sedimentation and flotation of copper and sulfur in fine-grained tailings is proposed, wherein the feed ore has a Cu grade of 0.05% and a S grade of 0.15%, the copper concentrate has a Cu grade of 10% and a Cu recovery rate of 82%, and the sulfur concentrate has a S grade of 40% and a S recovery rate of 45%.

[0098] A method for flocculation sedimentation and flotation of phosphorus in fine tailings, with a P2O5 grade of 2% in the feed, a P2O5 grade of 30% in the concentrate, and a P2O5 recovery rate of 65%.

[0099] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A beneficiation plant for recovering copper, sulphur and phosphorus from fine fraction tailings, characterized in that, The application relates to a tailing water recovery device. The device comprises a pool body (1) for containing and settling tailing water, a shaft body (2) vertically and rotatably arranged in the pool body (1), a rake frame (3) slidably arranged on the outer periphery of the shaft body (2) through a sliding piece (31), the rake frame (3) being capable of following the shaft body (2) to rotate circumferentially, the rake frame (3) being rotatably connected with the sliding piece (31), the rake frame (3) being capable of moving along the shaft body (2) in the axial direction following the sliding piece (31) and vertically swinging to be retracted on the outer periphery of the shaft body (2), and a scraping piece (4) arranged on the lower part of the rake frame (3), the scraping piece (4) being capable of scraping the tailings settled on the bottom of the pool body (1) when following the rake frame (3) to rotate. The scraping piece (4) has a scraping surface (41), the rake frame (3) comprises a first rod (32), a second rod (33), a third rod (34) and a fourth rod (35) which are sequentially hingedly connected, the first rod (32), the second rod (33), the third rod (34) and the fourth rod (35) form a parallel four-bar linkage structure, the first rod (32) is arranged on the sliding piece (31), and the scraping piece (4) is arranged on the second rod (33). The scraping piece (4) comprises a swinging shaft (42) rotatably arranged on the second rod (33), a scraping plate (43) arranged on the swinging shaft (42), the scraping plate (43) being located below the second rod (33), the scraping plate (43) being capable of swinging following the swinging shaft (42), and the scraping surface (41) being located on the scraping plate (43). A sliding rod (44) is slidably arranged on the second rod (33), one side of the sliding rod (44) is provided with a rack (45), the swinging shaft (42) is meshed with the rack (45) through a gear (46), the sliding rod (44) is capable of driving the swinging shaft (42) to rotate after sliding, one side of the sliding rod (44) towards the fourth rod (35) is provided with a driving groove (47), a telescopic driving rod (48) is arranged at one end of the fourth rod (35) and slidably arranged in the driving groove (47), the telescopic driving rod (48) is perpendicular to the fourth rod (35), and when the rake frame (3) swings, the telescopic driving rod (48) can be extended or retracted and slid along the driving groove (47) to drive the sliding rod (44) to move.

2. The tailing water recovery device according to claim 1, wherein the scraping piece (4) is swingably arranged below the rake frame (3), the scraping piece (4) has a scraping state and a resistance reducing state, in the scraping state, the scraping piece (4) can be in contact with the bottom wall of the pool body (1) to scrape the tailings on the bottom of the pool body (1), and in the resistance reducing state, the resistance of the scraping piece (4) following the rake frame (3) to rotate can be reduced.

3. The tailing water recovery device according to claim 2, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ The scraping surface (41) is configured to be perpendicular or inclined to the rotation direction of the rake frame (3) when the scraper (4) is in the scraping state, and parallel to the rotation direction of the rake frame (3) when the scraper (4) is in the resistance reduction state.

4. The mineral processing equipment for recovering copper, sulfur and phosphorus from fine particle tailings according to claim 3, characterized in that, The scraper (4) can swing with the rake frame (3), and the scraper (4) is configured to be in the resistance reduction state after the rake frame (3) swings to the end close to the shaft body (2), and the scraper (4) is in the scraping state after the rake frame (3) swings to the end away from the shaft body (2).

5. The mineral processing equipment for recovering copper, sulfur and phosphorus from fine particle tailings according to claim 1, characterized in that, The driving slot (47) is provided with a limiting piece (49) for limiting the sliding range of the telescopic driving rod (48) in the driving slot (47).

6. The mineral processing equipment for recovering copper, sulfur and phosphorus from fine particle tailings according to claim 1, characterized in that, The pool body (1) is provided with an overflow tank (5) on the outer wall, which is used to collect clean water overflowing from the top of the pool body (1); The pool wall of the pool body (1) has a vertically arranged strip-shaped overflow opening (11) at the top, and an opening adjusting baffle (12) is arranged on the strip-shaped overflow opening (11) for lifting and lowering, which can adjust the height of the lowest part of the strip-shaped overflow opening (11) after lifting and lowering.

7. A method for recovering copper, sulfur and phosphorus from fine fraction tailings, using the beneficiation plant according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: A1: adding tailings water into the pool body (1) and standing; A2: swing the rake frame (3) to make its end close to the shaft body (2), and then drive the shaft body (2) to rotate; A3: swing the rake frame (3) and make its end gradually away from the shaft body (2), and after the rake frame (3) swings to make the scraper (4) close to the bottom of the pool body (1), the scraper (4) scrapes the tailings settled at the bottom of the pool body (1).

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